libcli/smb/smbXcli_base.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Infrastructure for async SMB client requests
   4    Copyright (C) Volker Lendecke 2008
   5    Copyright (C) Stefan Metzmacher 2011
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/network.h"
  23 #include "../lib/async_req/async_sock.h"
  24 #include "../lib/util/tevent_ntstatus.h"
  25 #include "../lib/util/tevent_unix.h"
  26 #include "lib/util/util_net.h"
  27 #include "lib/util/dlinklist.h"
  28 #include "lib/util/iov_buf.h"
  29 #include "../libcli/smb/smb_common.h"
  30 #include "../libcli/smb/smb_seal.h"
  31 #include "../libcli/smb/smb_signing.h"
  32 #include "../libcli/smb/read_smb.h"
  33 #include "smbXcli_base.h"
  34 #include "librpc/ndr/libndr.h"
  35 #include "libcli/smb/smb2_negotiate_context.h"
  36 #include "lib/crypto/sha512.h"
  37 #include "lib/crypto/aes.h"
  38 #include "lib/crypto/aes_ccm_128.h"
  39 #include "lib/crypto/aes_gcm_128.h"
  40
  41 struct smbXcli_conn;
  42 struct smbXcli_req;
  43 struct smbXcli_session;
  44 struct smbXcli_tcon;
  45
  46 struct smbXcli_conn {
  47         int sock_fd;
  48         struct sockaddr_storage local_ss;
  49         struct sockaddr_storage remote_ss;
  50         const char *remote_name;
  51
  52         struct tevent_queue *outgoing;
  53         struct tevent_req **pending;
  54         struct tevent_req *read_smb_req;
  55         struct tevent_req *suicide_req;
  56
  57         enum protocol_types min_protocol;
  58         enum protocol_types max_protocol;
  59         enum protocol_types protocol;
  60         bool allow_signing;
  61         bool desire_signing;
  62         bool mandatory_signing;
  63
  64         /*
  65          * The incoming dispatch function should return:
  66          * - NT_STATUS_RETRY, if more incoming PDUs are expected.
  67          * - NT_STATUS_OK, if no more processing is desired, e.g.
  68          *                 the dispatch function called
  69          *                 tevent_req_done().
  70          * - All other return values disconnect the connection.
  71          */
  72         NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
  73                                       TALLOC_CTX *tmp_mem,
  74                                       uint8_t *inbuf);
  75
  76         struct {
  77                 struct {
  78                         uint32_t capabilities;
  79                         uint32_t max_xmit;
  80                 } client;
  81
  82                 struct {
  83                         uint32_t capabilities;
  84                         uint32_t max_xmit;
  85                         uint16_t max_mux;
  86                         uint16_t security_mode;
  87                         bool readbraw;
  88                         bool writebraw;
  89                         bool lockread;
  90                         bool writeunlock;
  91                         uint32_t session_key;
  92                         struct GUID guid;
  93                         DATA_BLOB gss_blob;
  94                         uint8_t challenge[8];
  95                         const char *workgroup;
  96                         const char *name;
  97                         int time_zone;
  98                         NTTIME system_time;
  99                 } server;
 100
 101                 uint32_t capabilities;
 102                 uint32_t max_xmit;
 103
 104                 uint16_t mid;
 105
 106                 struct smb_signing_state *signing;
 107                 struct smb_trans_enc_state *trans_enc;
 108
 109                 struct tevent_req *read_braw_req;
 110         } smb1;
 111
 112         struct {
 113                 struct {
 114                         uint32_t capabilities;
 115                         uint16_t security_mode;
 116                         struct GUID guid;
 117                 } client;
 118
 119                 struct {
 120                         uint32_t capabilities;
 121                         uint16_t security_mode;
 122                         struct GUID guid;
 123                         uint32_t max_trans_size;
 124                         uint32_t max_read_size;
 125                         uint32_t max_write_size;
 126                         NTTIME system_time;
 127                         NTTIME start_time;
 128                         DATA_BLOB gss_blob;
 129                         uint16_t cipher;
 130                 } server;
 131
 132                 uint64_t mid;
 133                 uint16_t cur_credits;
 134                 uint16_t max_credits;
 135
 136                 uint32_t cc_chunk_len;
 137                 uint32_t cc_max_chunks;
 138
 139                 uint8_t io_priority;
 140
 141                 uint8_t preauth_sha512[64];
 142         } smb2;
 143
 144         struct smbXcli_session *sessions;
 145 };
 146
 147 struct smb2cli_session {
 148         uint64_t session_id;
 149         uint16_t session_flags;
 150         DATA_BLOB application_key;
 151         DATA_BLOB signing_key;
 152         bool should_sign;
 153         bool should_encrypt;
 154         DATA_BLOB encryption_key;
 155         DATA_BLOB decryption_key;
 156         uint64_t nonce_high_random;
 157         uint64_t nonce_high_max;
 158         uint64_t nonce_high;
 159         uint64_t nonce_low;
 160         uint16_t channel_sequence;
 161         bool replay_active;
 162 };
 163
 164 struct smbXcli_session {
 165         struct smbXcli_session *prev, *next;
 166         struct smbXcli_conn *conn;
 167
 168         struct {
 169                 uint16_t session_id;
 170                 DATA_BLOB application_key;
 171                 bool protected_key;
 172         } smb1;
 173
 174         struct smb2cli_session *smb2;
 175
 176         struct {
 177                 DATA_BLOB signing_key;
 178                 uint8_t preauth_sha512[64];
 179         } smb2_channel;
 180
 181         /*
 182          * this should be a short term hack
 183          * until the upper layers have implemented
 184          * re-authentication.
 185          */
 186         bool disconnect_expired;
 187 };
 188
 189 struct smbXcli_tcon {
 190         bool is_smb1;
 191         uint32_t fs_attributes;
 192
 193         struct {
 194                 uint16_t tcon_id;
 195                 uint16_t optional_support;
 196                 uint32_t maximal_access;
 197                 uint32_t guest_maximal_access;
 198                 char *service;
 199                 char *fs_type;
 200         } smb1;
 201
 202         struct {
 203                 uint32_t tcon_id;
 204                 uint8_t type;
 205                 uint32_t flags;
 206                 uint32_t capabilities;
 207                 uint32_t maximal_access;
 208                 bool should_sign;
 209                 bool should_encrypt;
 210         } smb2;
 211 };
 212
 213 struct smbXcli_req_state {
 214         struct tevent_context *ev;
 215         struct smbXcli_conn *conn;
 216         struct smbXcli_session *session; /* maybe NULL */
 217         struct smbXcli_tcon *tcon; /* maybe NULL */
 218
 219         uint8_t length_hdr[4];
 220
 221         bool one_way;
 222
 223         uint8_t *inbuf;
 224
 225         struct tevent_req *write_req;
 226
 227         struct {
 228                 /* Space for the header including the wct */
 229                 uint8_t hdr[HDR_VWV];
 230
 231                 /*
 232                  * For normal requests, smb1cli_req_send chooses a mid.
 233                  * SecondaryV trans requests need to use the mid of the primary
 234                  * request, so we need a place to store it.
 235                  * Assume it is set if != 0.
 236                  */
 237                 uint16_t mid;
 238
 239                 uint16_t *vwv;
 240                 uint8_t bytecount_buf[2];
 241
 242 #define MAX_SMB_IOV 10
 243                 /* length_hdr, hdr, words, byte_count, buffers */
 244                 struct iovec iov[1 + 3 + MAX_SMB_IOV];
 245                 int iov_count;
 246
 247                 bool one_way_seqnum;
 248                 uint32_t seqnum;
 249                 struct tevent_req **chained_requests;
 250
 251                 uint8_t recv_cmd;
 252                 NTSTATUS recv_status;
 253                 /* always an array of 3 talloc elements */
 254                 struct iovec *recv_iov;
 255         } smb1;
 256
 257         struct {
 258                 const uint8_t *fixed;
 259                 uint16_t fixed_len;
 260                 const uint8_t *dyn;
 261                 uint32_t dyn_len;
 262
 263                 uint8_t transform[SMB2_TF_HDR_SIZE];
 264                 uint8_t hdr[SMB2_HDR_BODY];
 265                 uint8_t pad[7]; /* padding space for compounding */
 266
 267                 /*
 268                  * always an array of 3 talloc elements
 269                  * (without a SMB2_TRANSFORM header!)
 270                  *
 271                  * HDR, BODY, DYN
 272                  */
 273                 struct iovec *recv_iov;
 274
 275                 /*
 276                  * the expected max for the response dyn_len
 277                  */
 278                 uint32_t max_dyn_len;
 279
 280                 uint16_t credit_charge;
 281
 282                 bool should_sign;
 283                 bool should_encrypt;
 284                 uint64_t encryption_session_id;
 285
 286                 bool signing_skipped;
 287                 bool notify_async;
 288                 bool got_async;
 289                 uint16_t cancel_flags;
 290                 uint64_t cancel_mid;
 291                 uint64_t cancel_aid;
 292         } smb2;
 293 };
 294
 295 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
 296 {
 297         /*
 298          * NT_STATUS_OK, means we do not notify the callers
 299          */
 300         smbXcli_conn_disconnect(conn, NT_STATUS_OK);
 301
 302         while (conn->sessions) {
 303                 conn->sessions->conn = NULL;
 304                 DLIST_REMOVE(conn->sessions, conn->sessions);
 305         }
 306
 307         if (conn->smb1.trans_enc) {
 308                 TALLOC_FREE(conn->smb1.trans_enc);
 309         }
 310
 311         return 0;
 312 }
 313
 314 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
 315                                          int fd,
 316                                          const char *remote_name,
 317                                          enum smb_signing_setting signing_state,
 318                                          uint32_t smb1_capabilities,
 319                                          struct GUID *client_guid,
 320                                          uint32_t smb2_capabilities)
 321 {
 322         struct smbXcli_conn *conn = NULL;
 323         void *ss = NULL;
 324         struct sockaddr *sa = NULL;
 325         socklen_t sa_length;
 326         int ret;
 327
 328         conn = talloc_zero(mem_ctx, struct smbXcli_conn);
 329         if (!conn) {
 330                 return NULL;
 331         }
 332
 333         conn->sock_fd = fd;
 334
 335         conn->remote_name = talloc_strdup(conn, remote_name);
 336         if (conn->remote_name == NULL) {
 337                 goto error;
 338         }
 339
 340         ss = (void *)&conn->local_ss;
 341         sa = (struct sockaddr *)ss;
 342         sa_length = sizeof(conn->local_ss);
 343         ret = getsockname(fd, sa, &sa_length);
 344         if (ret == -1) {
 345                 goto error;
 346         }
 347         ss = (void *)&conn->remote_ss;
 348         sa = (struct sockaddr *)ss;
 349         sa_length = sizeof(conn->remote_ss);
 350         ret = getpeername(fd, sa, &sa_length);
 351         if (ret == -1) {
 352                 goto error;
 353         }
 354
 355         conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
 356         if (conn->outgoing == NULL) {
 357                 goto error;
 358         }
 359         conn->pending = NULL;
 360
 361         conn->min_protocol = PROTOCOL_NONE;
 362         conn->max_protocol = PROTOCOL_NONE;
 363         conn->protocol = PROTOCOL_NONE;
 364
 365         switch (signing_state) {
 366         case SMB_SIGNING_OFF:
 367                 /* never */
 368                 conn->allow_signing = false;
 369                 conn->desire_signing = false;
 370                 conn->mandatory_signing = false;
 371                 break;
 372         case SMB_SIGNING_DEFAULT:
 373         case SMB_SIGNING_IF_REQUIRED:
 374                 /* if the server requires it */
 375                 conn->allow_signing = true;
 376                 conn->desire_signing = false;
 377                 conn->mandatory_signing = false;
 378                 break;
 379         case SMB_SIGNING_DESIRED:
 380                 /* if the server desires it */
 381                 conn->allow_signing = true;
 382                 conn->desire_signing = true;
 383                 conn->mandatory_signing = false;
 384                 break;
 385         case SMB_SIGNING_REQUIRED:
 386                 /* always */
 387                 conn->allow_signing = true;
 388                 conn->desire_signing = true;
 389                 conn->mandatory_signing = true;
 390                 break;
 391         }
 392
 393         conn->smb1.client.capabilities = smb1_capabilities;
 394         conn->smb1.client.max_xmit = UINT16_MAX;
 395
 396         conn->smb1.capabilities = conn->smb1.client.capabilities;
 397         conn->smb1.max_xmit = 1024;
 398
 399         conn->smb1.mid = 1;
 400
 401         /* initialise signing */
 402         conn->smb1.signing = smb_signing_init(conn,
 403                                               conn->allow_signing,
 404                                               conn->desire_signing,
 405                                               conn->mandatory_signing);
 406         if (!conn->smb1.signing) {
 407                 goto error;
 408         }
 409
 410         conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
 411         if (conn->mandatory_signing) {
 412                 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
 413         }
 414         if (client_guid) {
 415                 conn->smb2.client.guid = *client_guid;
 416         }
 417         conn->smb2.client.capabilities = smb2_capabilities;
 418
 419         conn->smb2.cur_credits = 1;
 420         conn->smb2.max_credits = 0;
 421         conn->smb2.io_priority = 1;
 422
 423         /*
 424          * Samba and Windows servers accept a maximum of 16 MiB with a maximum
 425          * chunk length of 1 MiB.
 426          */
 427         conn->smb2.cc_chunk_len = 1024 * 1024;
 428         conn->smb2.cc_max_chunks = 16;
 429
 430         talloc_set_destructor(conn, smbXcli_conn_destructor);
 431         return conn;
 432
 433  error:
 434         TALLOC_FREE(conn);
 435         return NULL;
 436 }
 437
 438 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
 439 {
 440         if (conn == NULL) {
 441                 return false;
 442         }
 443
 444         if (conn->sock_fd == -1) {
 445                 return false;
 446         }
 447
 448         return true;
 449 }
 450
 451 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
 452 {
 453         return conn->protocol;
 454 }
 455
 456 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
 457 {
 458         if (conn->protocol >= PROTOCOL_SMB2_02) {
 459                 return true;
 460         }
 461
 462         if (conn->smb1.capabilities & CAP_UNICODE) {
 463                 return true;
 464         }
 465
 466         return false;
 467 }
 468
 469 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
 470 {
 471         set_socket_options(conn->sock_fd, options);
 472 }
 473
 474 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
 475 {
 476         return &conn->local_ss;
 477 }
 478
 479 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
 480 {
 481         return &conn->remote_ss;
 482 }
 483
 484 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
 485 {
 486         return conn->remote_name;
 487 }
 488
 489 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
 490 {
 491         if (conn->protocol >= PROTOCOL_SMB2_02) {
 492                 /*
 493                  * TODO...
 494                  */
 495                 return 1;
 496         }
 497
 498         return conn->smb1.server.max_mux;
 499 }
 500
 501 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
 502 {
 503         if (conn->protocol >= PROTOCOL_SMB2_02) {
 504                 return conn->smb2.server.system_time;
 505         }
 506
 507         return conn->smb1.server.system_time;
 508 }
 509
 510 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
 511 {
 512         if (conn->protocol >= PROTOCOL_SMB2_02) {
 513                 return &conn->smb2.server.gss_blob;
 514         }
 515
 516         return &conn->smb1.server.gss_blob;
 517 }
 518
 519 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
 520 {
 521         if (conn->protocol >= PROTOCOL_SMB2_02) {
 522                 return &conn->smb2.server.guid;
 523         }
 524
 525         return &conn->smb1.server.guid;
 526 }
 527
 528 struct smbXcli_conn_samba_suicide_state {
 529         struct smbXcli_conn *conn;
 530         struct iovec iov;
 531         uint8_t buf[9];
 532         struct tevent_req *write_req;
 533 };
 534
 535 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
 536                                                enum tevent_req_state req_state);
 537 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
 538
 539 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
 540                                                    struct tevent_context *ev,
 541                                                    struct smbXcli_conn *conn,
 542                                                    uint8_t exitcode)
 543 {
 544         struct tevent_req *req, *subreq;
 545         struct smbXcli_conn_samba_suicide_state *state;
 546
 547         req = tevent_req_create(mem_ctx, &state,
 548                                 struct smbXcli_conn_samba_suicide_state);
 549         if (req == NULL) {
 550                 return NULL;
 551         }
 552         state->conn = conn;
 553         SIVAL(state->buf, 4, 0x74697865);
 554         SCVAL(state->buf, 8, exitcode);
 555         _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
 556
 557         if (conn->suicide_req != NULL) {
 558                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 559                 return tevent_req_post(req, ev);
 560         }
 561
 562         state->iov.iov_base = state->buf;
 563         state->iov.iov_len = sizeof(state->buf);
 564
 565         subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
 566                              false, &state->iov, 1);
 567         if (tevent_req_nomem(subreq, req)) {
 568                 return tevent_req_post(req, ev);
 569         }
 570         tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
 571         state->write_req = subreq;
 572
 573         tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
 574
 575         /*
 576          * We need to use tevent_req_defer_callback()
 577          * in order to allow smbXcli_conn_disconnect()
 578          * to do a safe cleanup.
 579          */
 580         tevent_req_defer_callback(req, ev);
 581         conn->suicide_req = req;
 582
 583         return req;
 584 }
 585
 586 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
 587                                                enum tevent_req_state req_state)
 588 {
 589         struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
 590                 req, struct smbXcli_conn_samba_suicide_state);
 591
 592         TALLOC_FREE(state->write_req);
 593
 594         if (state->conn == NULL) {
 595                 return;
 596         }
 597
 598         if (state->conn->suicide_req == req) {
 599                 state->conn->suicide_req = NULL;
 600         }
 601         state->conn = NULL;
 602 }
 603
 604 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
 605 {
 606         struct tevent_req *req = tevent_req_callback_data(
 607                 subreq, struct tevent_req);
 608         struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
 609                 req, struct smbXcli_conn_samba_suicide_state);
 610         ssize_t nwritten;
 611         int err;
 612
 613         state->write_req = NULL;
 614
 615         nwritten = writev_recv(subreq, &err);
 616         TALLOC_FREE(subreq);
 617         if (nwritten == -1) {
 618                 /* here, we need to notify all pending requests */
 619                 NTSTATUS status = map_nt_error_from_unix_common(err);
 620                 smbXcli_conn_disconnect(state->conn, status);
 621                 return;
 622         }
 623         tevent_req_done(req);
 624 }
 625
 626 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
 627 {
 628         return tevent_req_simple_recv_ntstatus(req);
 629 }
 630
 631 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
 632                                     uint8_t exitcode)
 633 {
 634         TALLOC_CTX *frame = talloc_stackframe();
 635         struct tevent_context *ev;
 636         struct tevent_req *req;
 637         NTSTATUS status = NT_STATUS_NO_MEMORY;
 638         bool ok;
 639
 640         if (smbXcli_conn_has_async_calls(conn)) {
 641                 /*
 642                  * Can't use sync call while an async call is in flight
 643                  */
 644                 status = NT_STATUS_INVALID_PARAMETER_MIX;
 645                 goto fail;
 646         }
 647         ev = samba_tevent_context_init(frame);
 648         if (ev == NULL) {
 649                 goto fail;
 650         }
 651         req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
 652         if (req == NULL) {
 653                 goto fail;
 654         }
 655         ok = tevent_req_poll_ntstatus(req, ev, &status);
 656         if (!ok) {
 657                 goto fail;
 658         }
 659         status = smbXcli_conn_samba_suicide_recv(req);
 660  fail:
 661         TALLOC_FREE(frame);
 662         return status;
 663 }
 664
 665 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
 666 {
 667         return conn->smb1.capabilities;
 668 }
 669
 670 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
 671 {
 672         return conn->smb1.max_xmit;
 673 }
 674
 675 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
 676 {
 677         size_t pending = talloc_array_length(conn->pending);
 678         uint16_t possible = conn->smb1.server.max_mux;
 679
 680         if (pending >= possible) {
 681                 return false;
 682         }
 683
 684         return true;
 685 }
 686
 687 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
 688 {
 689         return conn->smb1.server.session_key;
 690 }
 691
 692 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
 693 {
 694         return conn->smb1.server.challenge;
 695 }
 696
 697 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
 698 {
 699         return conn->smb1.server.security_mode;
 700 }
 701
 702 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
 703 {
 704         return conn->smb1.server.readbraw;
 705 }
 706
 707 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
 708 {
 709         return conn->smb1.server.writebraw;
 710 }
 711
 712 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
 713 {
 714         return conn->smb1.server.lockread;
 715 }
 716
 717 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
 718 {
 719         return conn->smb1.server.writeunlock;
 720 }
 721
 722 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
 723 {
 724         return conn->smb1.server.time_zone;
 725 }
 726
 727 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
 728                                    const DATA_BLOB user_session_key,
 729                                    const DATA_BLOB response)
 730 {
 731         return smb_signing_activate(conn->smb1.signing,
 732                                     user_session_key,
 733                                     response);
 734 }
 735
 736 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
 737                                 const uint8_t *buf, uint32_t seqnum)
 738 {
 739         const uint8_t *hdr = buf + NBT_HDR_SIZE;
 740         size_t len = smb_len_nbt(buf);
 741
 742         return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
 743 }
 744
 745 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
 746 {
 747         return smb_signing_is_active(conn->smb1.signing);
 748 }
 749
 750 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
 751                                  struct smb_trans_enc_state *es)
 752 {
 753         /* Replace the old state, if any. */
 754         if (conn->smb1.trans_enc) {
 755                 TALLOC_FREE(conn->smb1.trans_enc);
 756         }
 757         conn->smb1.trans_enc = es;
 758 }
 759
 760 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
 761 {
 762         return common_encryption_on(conn->smb1.trans_enc);
 763 }
 764
 765
 766 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
 767 {
 768         uint32_t flags2 = SVAL(hdr, HDR_FLG2);
 769         NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
 770
 771         if (NT_STATUS_IS_OK(status)) {
 772                 return NT_STATUS_OK;
 773         }
 774
 775         if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
 776                 return status;
 777         }
 778
 779         return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
 780 }
 781
 782 /**
 783  * Is the SMB command able to hold an AND_X successor
 784  * @param[in] cmd       The SMB command in question
 785  * @retval Can we add a chained request after "cmd"?
 786  */
 787 bool smb1cli_is_andx_req(uint8_t cmd)
 788 {
 789         switch (cmd) {
 790         case SMBtconX:
 791         case SMBlockingX:
 792         case SMBopenX:
 793         case SMBreadX:
 794         case SMBwriteX:
 795         case SMBsesssetupX:
 796         case SMBulogoffX:
 797         case SMBntcreateX:
 798                 return true;
 799                 break;
 800         default:
 801                 break;
 802         }
 803
 804         return false;
 805 }
 806
 807 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
 808 {
 809         size_t num_pending = talloc_array_length(conn->pending);
 810         uint16_t result;
 811
 812         if (conn->protocol == PROTOCOL_NONE) {
 813                 /*
 814                  * This is what windows sends on the SMB1 Negprot request
 815                  * and some vendors reuse the SMB1 MID as SMB2 sequence number.
 816                  */
 817                 return 0;
 818         }
 819
 820         while (true) {
 821                 size_t i;
 822
 823                 result = conn->smb1.mid++;
 824                 if ((result == 0) || (result == 0xffff)) {
 825                         continue;
 826                 }
 827
 828                 for (i=0; i<num_pending; i++) {
 829                         if (result == smb1cli_req_mid(conn->pending[i])) {
 830                                 break;
 831                         }
 832                 }
 833
 834                 if (i == num_pending) {
 835                         return result;
 836                 }
 837         }
 838 }
 839
 840 void smbXcli_req_unset_pending(struct tevent_req *req)
 841 {
 842         struct smbXcli_req_state *state =
 843                 tevent_req_data(req,
 844                 struct smbXcli_req_state);
 845         struct smbXcli_conn *conn = state->conn;
 846         size_t num_pending = talloc_array_length(conn->pending);
 847         size_t i;
 848
 849         TALLOC_FREE(state->write_req);
 850
 851         if (state->smb1.mid != 0) {
 852                 /*
 853                  * This is a [nt]trans[2] request which waits
 854                  * for more than one reply.
 855                  */
 856                 return;
 857         }
 858
 859         tevent_req_set_cleanup_fn(req, NULL);
 860
 861         if (num_pending == 1) {
 862                 /*
 863                  * The pending read_smb tevent_req is a child of
 864                  * conn->pending. So if nothing is pending anymore, we need to
 865                  * delete the socket read fde.
 866                  */
 867                 TALLOC_FREE(conn->pending);
 868                 conn->read_smb_req = NULL;
 869                 return;
 870         }
 871
 872         for (i=0; i<num_pending; i++) {
 873                 if (req == conn->pending[i]) {
 874                         break;
 875                 }
 876         }
 877         if (i == num_pending) {
 878                 /*
 879                  * Something's seriously broken. Just returning here is the
 880                  * right thing nevertheless, the point of this routine is to
 881                  * remove ourselves from conn->pending.
 882                  */
 883                 return;
 884         }
 885
 886         /*
 887          * Remove ourselves from the conn->pending array
 888          */
 889         for (; i < (num_pending - 1); i++) {
 890                 conn->pending[i] = conn->pending[i+1];
 891         }
 892
 893         /*
 894          * No NULL check here, we're shrinking by sizeof(void *), and
 895          * talloc_realloc just adjusts the size for this.
 896          */
 897         conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
 898                                        num_pending - 1);
 899         return;
 900 }
 901
 902 static void smbXcli_req_cleanup(struct tevent_req *req,
 903                                 enum tevent_req_state req_state)
 904 {
 905         struct smbXcli_req_state *state =
 906                 tevent_req_data(req,
 907                 struct smbXcli_req_state);
 908
 909         TALLOC_FREE(state->write_req);
 910
 911         switch (req_state) {
 912         case TEVENT_REQ_RECEIVED:
 913                 /*
 914                  * Make sure we really remove it from
 915                  * the pending array on destruction.
 916                  */
 917                 state->smb1.mid = 0;
 918                 smbXcli_req_unset_pending(req);
 919                 return;
 920         default:
 921                 return;
 922         }
 923 }
 924
 925 static bool smb1cli_req_cancel(struct tevent_req *req);
 926 static bool smb2cli_req_cancel(struct tevent_req *req);
 927
 928 static bool smbXcli_req_cancel(struct tevent_req *req)
 929 {
 930         struct smbXcli_req_state *state =
 931                 tevent_req_data(req,
 932                 struct smbXcli_req_state);
 933
 934         if (!smbXcli_conn_is_connected(state->conn)) {
 935                 return false;
 936         }
 937
 938         if (state->conn->protocol == PROTOCOL_NONE) {
 939                 return false;
 940         }
 941
 942         if (state->conn->protocol >= PROTOCOL_SMB2_02) {
 943                 return smb2cli_req_cancel(req);
 944         }
 945
 946         return smb1cli_req_cancel(req);
 947 }
 948
 949 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
 950
 951 bool smbXcli_req_set_pending(struct tevent_req *req)
 952 {
 953         struct smbXcli_req_state *state =
 954                 tevent_req_data(req,
 955                 struct smbXcli_req_state);
 956         struct smbXcli_conn *conn;
 957         struct tevent_req **pending;
 958         size_t num_pending;
 959
 960         conn = state->conn;
 961
 962         if (!smbXcli_conn_is_connected(conn)) {
 963                 return false;
 964         }
 965
 966         num_pending = talloc_array_length(conn->pending);
 967
 968         pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
 969                                  num_pending+1);
 970         if (pending == NULL) {
 971                 return false;
 972         }
 973         pending[num_pending] = req;
 974         conn->pending = pending;
 975         tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
 976         tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
 977
 978         if (!smbXcli_conn_receive_next(conn)) {
 979                 /*
 980                  * the caller should notify the current request
 981                  *
 982                  * And all other pending requests get notified
 983                  * by smbXcli_conn_disconnect().
 984                  */
 985                 smbXcli_req_unset_pending(req);
 986                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
 987                 return false;
 988         }
 989
 990         return true;
 991 }
 992
 993 static void smbXcli_conn_received(struct tevent_req *subreq);
 994
 995 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
 996 {
 997         size_t num_pending = talloc_array_length(conn->pending);
 998         struct tevent_req *req;
 999         struct smbXcli_req_state *state;
1000
1001         if (conn->read_smb_req != NULL) {
1002                 return true;
1003         }
1004
1005         if (num_pending == 0) {
1006                 if (conn->smb2.mid < UINT64_MAX) {
1007                         /* no more pending requests, so we are done for now */
1008                         return true;
1009                 }
1010
1011                 /*
1012                  * If there are no more SMB2 requests possible,
1013                  * because we are out of message ids,
1014                  * we need to disconnect.
1015                  */
1016                 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
1017                 return true;
1018         }
1019
1020         req = conn->pending[0];
1021         state = tevent_req_data(req, struct smbXcli_req_state);
1022
1023         /*
1024          * We're the first ones, add the read_smb request that waits for the
1025          * answer from the server
1026          */
1027         conn->read_smb_req = read_smb_send(conn->pending,
1028                                            state->ev,
1029                                            conn->sock_fd);
1030         if (conn->read_smb_req == NULL) {
1031                 return false;
1032         }
1033         tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
1034         return true;
1035 }
1036
1037 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
1038 {
1039         struct smbXcli_session *session;
1040         int sock_fd = conn->sock_fd;
1041
1042         tevent_queue_stop(conn->outgoing);
1043
1044         conn->sock_fd = -1;
1045
1046         session = conn->sessions;
1047         if (talloc_array_length(conn->pending) == 0) {
1048                 /*
1049                  * if we do not have pending requests
1050                  * there is no need to update the channel_sequence
1051                  */
1052                 session = NULL;
1053         }
1054         for (; session; session = session->next) {
1055                 smb2cli_session_increment_channel_sequence(session);
1056         }
1057
1058         if (conn->suicide_req != NULL) {
1059                 /*
1060                  * smbXcli_conn_samba_suicide_send()
1061                  * used tevent_req_defer_callback() already.
1062                  */
1063                 if (!NT_STATUS_IS_OK(status)) {
1064                         tevent_req_nterror(conn->suicide_req, status);
1065                 }
1066                 conn->suicide_req = NULL;
1067         }
1068
1069         /*
1070          * Cancel all pending requests. We do not do a for-loop walking
1071          * conn->pending because that array changes in
1072          * smbXcli_req_unset_pending.
1073          */
1074         while (talloc_array_length(conn->pending) > 0) {
1075                 struct tevent_req *req;
1076                 struct smbXcli_req_state *state;
1077                 struct tevent_req **chain;
1078                 size_t num_chained;
1079                 size_t i;
1080
1081                 req = conn->pending[0];
1082                 state = tevent_req_data(req, struct smbXcli_req_state);
1083
1084                 if (state->smb1.chained_requests == NULL) {
1085                         /*
1086                          * We're dead. No point waiting for trans2
1087                          * replies.
1088                          */
1089                         state->smb1.mid = 0;
1090
1091                         smbXcli_req_unset_pending(req);
1092
1093                         if (NT_STATUS_IS_OK(status)) {
1094                                 /* do not notify the callers */
1095                                 continue;
1096                         }
1097
1098                         /*
1099                          * we need to defer the callback, because we may notify
1100                          * more then one caller.
1101                          */
1102                         tevent_req_defer_callback(req, state->ev);
1103                         tevent_req_nterror(req, status);
1104                         continue;
1105                 }
1106
1107                 chain = talloc_move(conn, &state->smb1.chained_requests);
1108                 num_chained = talloc_array_length(chain);
1109
1110                 for (i=0; i<num_chained; i++) {
1111                         req = chain[i];
1112                         state = tevent_req_data(req, struct smbXcli_req_state);
1113
1114                         /*
1115                          * We're dead. No point waiting for trans2
1116                          * replies.
1117                          */
1118                         state->smb1.mid = 0;
1119
1120                         smbXcli_req_unset_pending(req);
1121
1122                         if (NT_STATUS_IS_OK(status)) {
1123                                 /* do not notify the callers */
1124                                 continue;
1125                         }
1126
1127                         /*
1128                          * we need to defer the callback, because we may notify
1129                          * more than one caller.
1130                          */
1131                         tevent_req_defer_callback(req, state->ev);
1132                         tevent_req_nterror(req, status);
1133                 }
1134                 TALLOC_FREE(chain);
1135         }
1136
1137         if (sock_fd != -1) {
1138                 close(sock_fd);
1139         }
1140 }
1141
1142 /*
1143  * Fetch a smb request's mid. Only valid after the request has been sent by
1144  * smb1cli_req_send().
1145  */
1146 uint16_t smb1cli_req_mid(struct tevent_req *req)
1147 {
1148         struct smbXcli_req_state *state =
1149                 tevent_req_data(req,
1150                 struct smbXcli_req_state);
1151
1152         if (state->smb1.mid != 0) {
1153                 return state->smb1.mid;
1154         }
1155
1156         return SVAL(state->smb1.hdr, HDR_MID);
1157 }
1158
1159 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1160 {
1161         struct smbXcli_req_state *state =
1162                 tevent_req_data(req,
1163                 struct smbXcli_req_state);
1164
1165         state->smb1.mid = mid;
1166 }
1167
1168 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1169 {
1170         struct smbXcli_req_state *state =
1171                 tevent_req_data(req,
1172                 struct smbXcli_req_state);
1173
1174         return state->smb1.seqnum;
1175 }
1176
1177 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1178 {
1179         struct smbXcli_req_state *state =
1180                 tevent_req_data(req,
1181                 struct smbXcli_req_state);
1182
1183         state->smb1.seqnum = seqnum;
1184 }
1185
1186 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1187 {
1188         ssize_t ret = iov_buflen(iov, count);
1189
1190         /* Ignore the overflow case for now ... */
1191         return ret;
1192 }
1193
1194 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1195                                    const struct iovec *iov,
1196                                    int count)
1197 {
1198         ssize_t buflen;
1199         uint8_t *buf;
1200
1201         buflen = iov_buflen(iov, count);
1202         if (buflen == -1) {
1203                 return NULL;
1204         }
1205
1206         buf = talloc_array(mem_ctx, uint8_t, buflen);
1207         if (buf == NULL) {
1208                 return NULL;
1209         }
1210
1211         iov_buf(iov, count, buf, buflen);
1212
1213         return buf;
1214 }
1215
1216 static void smb1cli_req_flags(enum protocol_types protocol,
1217                               uint32_t smb1_capabilities,
1218                               uint8_t smb_command,
1219                               uint8_t additional_flags,
1220                               uint8_t clear_flags,
1221                               uint8_t *_flags,
1222                               uint16_t additional_flags2,
1223                               uint16_t clear_flags2,
1224                               uint16_t *_flags2)
1225 {
1226         uint8_t flags = 0;
1227         uint16_t flags2 = 0;
1228
1229         if (protocol >= PROTOCOL_LANMAN1) {
1230                 flags |= FLAG_CASELESS_PATHNAMES;
1231                 flags |= FLAG_CANONICAL_PATHNAMES;
1232         }
1233
1234         if (protocol >= PROTOCOL_LANMAN2) {
1235                 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1236                 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1237         }
1238
1239         if (protocol >= PROTOCOL_NT1) {
1240                 flags2 |= FLAGS2_IS_LONG_NAME;
1241
1242                 if (smb1_capabilities & CAP_UNICODE) {
1243                         flags2 |= FLAGS2_UNICODE_STRINGS;
1244                 }
1245                 if (smb1_capabilities & CAP_STATUS32) {
1246                         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1247                 }
1248                 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1249                         flags2 |= FLAGS2_EXTENDED_SECURITY;
1250                 }
1251         }
1252
1253         flags |= additional_flags;
1254         flags &= ~clear_flags;
1255         flags2 |= additional_flags2;
1256         flags2 &= ~clear_flags2;
1257
1258         *_flags = flags;
1259         *_flags2 = flags2;
1260 }
1261
1262 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1263
1264 static bool smb1cli_req_cancel(struct tevent_req *req)
1265 {
1266         struct smbXcli_req_state *state =
1267                 tevent_req_data(req,
1268                 struct smbXcli_req_state);
1269         uint8_t flags;
1270         uint16_t flags2;
1271         uint32_t pid;
1272         uint16_t mid;
1273         struct tevent_req *subreq;
1274         NTSTATUS status;
1275
1276         flags = CVAL(state->smb1.hdr, HDR_FLG);
1277         flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1278         pid  = SVAL(state->smb1.hdr, HDR_PID);
1279         pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1280         mid = SVAL(state->smb1.hdr, HDR_MID);
1281
1282         subreq = smb1cli_req_create(state, state->ev,
1283                                     state->conn,
1284                                     SMBntcancel,
1285                                     flags, 0,
1286                                     flags2, 0,
1287                                     0, /* timeout */
1288                                     pid,
1289                                     state->tcon,
1290                                     state->session,
1291                                     0, NULL, /* vwv */
1292                                     0, NULL); /* bytes */
1293         if (subreq == NULL) {
1294                 return false;
1295         }
1296         smb1cli_req_set_mid(subreq, mid);
1297
1298         status = smb1cli_req_chain_submit(&subreq, 1);
1299         if (!NT_STATUS_IS_OK(status)) {
1300                 TALLOC_FREE(subreq);
1301                 return false;
1302         }
1303         smb1cli_req_set_mid(subreq, 0);
1304
1305         tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1306
1307         return true;
1308 }
1309
1310 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1311 {
1312         /* we do not care about the result */
1313         TALLOC_FREE(subreq);
1314 }
1315
1316 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1317                                       struct tevent_context *ev,
1318                                       struct smbXcli_conn *conn,
1319                                       uint8_t smb_command,
1320                                       uint8_t additional_flags,
1321                                       uint8_t clear_flags,
1322                                       uint16_t additional_flags2,
1323                                       uint16_t clear_flags2,
1324                                       uint32_t timeout_msec,
1325                                       uint32_t pid,
1326                                       struct smbXcli_tcon *tcon,
1327                                       struct smbXcli_session *session,
1328                                       uint8_t wct, uint16_t *vwv,
1329                                       int iov_count,
1330                                       struct iovec *bytes_iov)
1331 {
1332         struct tevent_req *req;
1333         struct smbXcli_req_state *state;
1334         uint8_t flags = 0;
1335         uint16_t flags2 = 0;
1336         uint16_t uid = 0;
1337         uint16_t tid = 0;
1338         ssize_t num_bytes;
1339
1340         if (iov_count > MAX_SMB_IOV) {
1341                 /*
1342                  * Should not happen :-)
1343                  */
1344                 return NULL;
1345         }
1346
1347         req = tevent_req_create(mem_ctx, &state,
1348                                 struct smbXcli_req_state);
1349         if (req == NULL) {
1350                 return NULL;
1351         }
1352         state->ev = ev;
1353         state->conn = conn;
1354         state->session = session;
1355         state->tcon = tcon;
1356
1357         if (session) {
1358                 uid = session->smb1.session_id;
1359         }
1360
1361         if (tcon) {
1362                 tid = tcon->smb1.tcon_id;
1363
1364                 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1365                         clear_flags |= FLAG_CASELESS_PATHNAMES;
1366                 } else {
1367                         /* Default setting, case insensitive. */
1368                         additional_flags |= FLAG_CASELESS_PATHNAMES;
1369                 }
1370
1371                 if (smbXcli_conn_dfs_supported(conn) &&
1372                     smbXcli_tcon_is_dfs_share(tcon))
1373                 {
1374                         additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1375                 }
1376         }
1377
1378         state->smb1.recv_cmd = 0xFF;
1379         state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1380         state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1381         if (state->smb1.recv_iov == NULL) {
1382                 TALLOC_FREE(req);
1383                 return NULL;
1384         }
1385
1386         smb1cli_req_flags(conn->protocol,
1387                           conn->smb1.capabilities,
1388                           smb_command,
1389                           additional_flags,
1390                           clear_flags,
1391                           &flags,
1392                           additional_flags2,
1393                           clear_flags2,
1394                           &flags2);
1395
1396         SIVAL(state->smb1.hdr, 0,           SMB_MAGIC);
1397         SCVAL(state->smb1.hdr, HDR_COM,     smb_command);
1398         SIVAL(state->smb1.hdr, HDR_RCLS,    NT_STATUS_V(NT_STATUS_OK));
1399         SCVAL(state->smb1.hdr, HDR_FLG,     flags);
1400         SSVAL(state->smb1.hdr, HDR_FLG2,    flags2);
1401         SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1402         SSVAL(state->smb1.hdr, HDR_TID,     tid);
1403         SSVAL(state->smb1.hdr, HDR_PID,     pid);
1404         SSVAL(state->smb1.hdr, HDR_UID,     uid);
1405         SSVAL(state->smb1.hdr, HDR_MID,     0); /* this comes later */
1406         SCVAL(state->smb1.hdr, HDR_WCT,     wct);
1407
1408         state->smb1.vwv = vwv;
1409
1410         num_bytes = iov_buflen(bytes_iov, iov_count);
1411         if (num_bytes == -1) {
1412                 /*
1413                  * I'd love to add a check for num_bytes<=UINT16_MAX here, but
1414                  * the smbclient->samba connections can lie and transfer more.
1415                  */
1416                 TALLOC_FREE(req);
1417                 return NULL;
1418         }
1419
1420         SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
1421
1422         state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1423         state->smb1.iov[0].iov_len  = sizeof(state->length_hdr);
1424         state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1425         state->smb1.iov[1].iov_len  = sizeof(state->smb1.hdr);
1426         state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1427         state->smb1.iov[2].iov_len  = wct * sizeof(uint16_t);
1428         state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1429         state->smb1.iov[3].iov_len  = sizeof(uint16_t);
1430
1431         if (iov_count != 0) {
1432                 memcpy(&state->smb1.iov[4], bytes_iov,
1433                        iov_count * sizeof(*bytes_iov));
1434         }
1435         state->smb1.iov_count = iov_count + 4;
1436
1437         if (timeout_msec > 0) {
1438                 struct timeval endtime;
1439
1440                 endtime = timeval_current_ofs_msec(timeout_msec);
1441                 if (!tevent_req_set_endtime(req, ev, endtime)) {
1442                         return req;
1443                 }
1444         }
1445
1446         switch (smb_command) {
1447         case SMBtranss:
1448         case SMBtranss2:
1449         case SMBnttranss:
1450                 state->one_way = true;
1451                 break;
1452         case SMBntcancel:
1453                 state->one_way = true;
1454                 state->smb1.one_way_seqnum = true;
1455                 break;
1456         case SMBlockingX:
1457                 if ((wct == 8) &&
1458                     (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1459                         state->one_way = true;
1460                 }
1461                 break;
1462         }
1463
1464         return req;
1465 }
1466
1467 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1468                                    struct iovec *iov, int iov_count,
1469                                    uint32_t *seqnum,
1470                                    bool one_way_seqnum)
1471 {
1472         TALLOC_CTX *frame = NULL;
1473         uint8_t *buf;
1474
1475         /*
1476          * Obvious optimization: Make cli_calculate_sign_mac work with struct
1477          * iovec directly. MD5Update would do that just fine.
1478          */
1479
1480         if (iov_count < 4) {
1481                 return NT_STATUS_INVALID_PARAMETER_MIX;
1482         }
1483         if (iov[0].iov_len != NBT_HDR_SIZE) {
1484                 return NT_STATUS_INVALID_PARAMETER_MIX;
1485         }
1486         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1487                 return NT_STATUS_INVALID_PARAMETER_MIX;
1488         }
1489         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1490                 return NT_STATUS_INVALID_PARAMETER_MIX;
1491         }
1492         if (iov[3].iov_len != sizeof(uint16_t)) {
1493                 return NT_STATUS_INVALID_PARAMETER_MIX;
1494         }
1495
1496         frame = talloc_stackframe();
1497
1498         buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1499         if (buf == NULL) {
1500                 return NT_STATUS_NO_MEMORY;
1501         }
1502
1503         *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1504                                           one_way_seqnum);
1505         smb_signing_sign_pdu(conn->smb1.signing,
1506                              buf, talloc_get_size(buf),
1507                              *seqnum);
1508         memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1509
1510         TALLOC_FREE(frame);
1511         return NT_STATUS_OK;
1512 }
1513
1514 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1515 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1516                                                TALLOC_CTX *tmp_mem,
1517                                                uint8_t *inbuf);
1518
1519 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1520                                           struct smbXcli_req_state *state,
1521                                           struct iovec *iov, int iov_count)
1522 {
1523         struct tevent_req *subreq;
1524         NTSTATUS status;
1525         uint8_t cmd;
1526         uint16_t mid;
1527         ssize_t nbtlen;
1528
1529         if (!smbXcli_conn_is_connected(state->conn)) {
1530                 return NT_STATUS_CONNECTION_DISCONNECTED;
1531         }
1532
1533         if (state->conn->protocol > PROTOCOL_NT1) {
1534                 return NT_STATUS_REVISION_MISMATCH;
1535         }
1536
1537         if (iov_count < 4) {
1538                 return NT_STATUS_INVALID_PARAMETER_MIX;
1539         }
1540         if (iov[0].iov_len != NBT_HDR_SIZE) {
1541                 return NT_STATUS_INVALID_PARAMETER_MIX;
1542         }
1543         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1544                 return NT_STATUS_INVALID_PARAMETER_MIX;
1545         }
1546         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1547                 return NT_STATUS_INVALID_PARAMETER_MIX;
1548         }
1549         if (iov[3].iov_len != sizeof(uint16_t)) {
1550                 return NT_STATUS_INVALID_PARAMETER_MIX;
1551         }
1552
1553         cmd = CVAL(iov[1].iov_base, HDR_COM);
1554         if (cmd == SMBreadBraw) {
1555                 if (smbXcli_conn_has_async_calls(state->conn)) {
1556                         return NT_STATUS_INVALID_PARAMETER_MIX;
1557                 }
1558                 state->conn->smb1.read_braw_req = req;
1559         }
1560
1561         if (state->smb1.mid != 0) {
1562                 mid = state->smb1.mid;
1563         } else {
1564                 mid = smb1cli_alloc_mid(state->conn);
1565         }
1566         SSVAL(iov[1].iov_base, HDR_MID, mid);
1567
1568         nbtlen = iov_buflen(&iov[1], iov_count-1);
1569         if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
1570                 return NT_STATUS_INVALID_PARAMETER_MIX;
1571         }
1572
1573         _smb_setlen_nbt(iov[0].iov_base, nbtlen);
1574
1575         status = smb1cli_conn_signv(state->conn, iov, iov_count,
1576                                     &state->smb1.seqnum,
1577                                     state->smb1.one_way_seqnum);
1578
1579         if (!NT_STATUS_IS_OK(status)) {
1580                 return status;
1581         }
1582
1583         /*
1584          * If we supported multiple encrytion contexts
1585          * here we'd look up based on tid.
1586          */
1587         if (common_encryption_on(state->conn->smb1.trans_enc)) {
1588                 char *buf, *enc_buf;
1589
1590                 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1591                 if (buf == NULL) {
1592                         return NT_STATUS_NO_MEMORY;
1593                 }
1594                 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1595                                                (char *)buf, &enc_buf);
1596                 TALLOC_FREE(buf);
1597                 if (!NT_STATUS_IS_OK(status)) {
1598                         DEBUG(0, ("Error in encrypting client message: %s\n",
1599                                   nt_errstr(status)));
1600                         return status;
1601                 }
1602                 buf = (char *)talloc_memdup(state, enc_buf,
1603                                             smb_len_nbt(enc_buf)+4);
1604                 SAFE_FREE(enc_buf);
1605                 if (buf == NULL) {
1606                         return NT_STATUS_NO_MEMORY;
1607                 }
1608                 iov[0].iov_base = (void *)buf;
1609                 iov[0].iov_len = talloc_get_size(buf);
1610                 iov_count = 1;
1611         }
1612
1613         if (state->conn->dispatch_incoming == NULL) {
1614                 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1615         }
1616
1617         if (!smbXcli_req_set_pending(req)) {
1618                 return NT_STATUS_NO_MEMORY;
1619         }
1620
1621         tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1622
1623         subreq = writev_send(state, state->ev, state->conn->outgoing,
1624                              state->conn->sock_fd, false, iov, iov_count);
1625         if (subreq == NULL) {
1626                 return NT_STATUS_NO_MEMORY;
1627         }
1628         tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1629         state->write_req = subreq;
1630
1631         return NT_STATUS_OK;
1632 }
1633
1634 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1635                                     struct tevent_context *ev,
1636                                     struct smbXcli_conn *conn,
1637                                     uint8_t smb_command,
1638                                     uint8_t additional_flags,
1639                                     uint8_t clear_flags,
1640                                     uint16_t additional_flags2,
1641                                     uint16_t clear_flags2,
1642                                     uint32_t timeout_msec,
1643                                     uint32_t pid,
1644                                     struct smbXcli_tcon *tcon,
1645                                     struct smbXcli_session *session,
1646                                     uint8_t wct, uint16_t *vwv,
1647                                     uint32_t num_bytes,
1648                                     const uint8_t *bytes)
1649 {
1650         struct tevent_req *req;
1651         struct iovec iov;
1652         NTSTATUS status;
1653
1654         iov.iov_base = discard_const_p(void, bytes);
1655         iov.iov_len = num_bytes;
1656
1657         req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1658                                  additional_flags, clear_flags,
1659                                  additional_flags2, clear_flags2,
1660                                  timeout_msec,
1661                                  pid, tcon, session,
1662                                  wct, vwv, 1, &iov);
1663         if (req == NULL) {
1664                 return NULL;
1665         }
1666         if (!tevent_req_is_in_progress(req)) {
1667                 return tevent_req_post(req, ev);
1668         }
1669         status = smb1cli_req_chain_submit(&req, 1);
1670         if (tevent_req_nterror(req, status)) {
1671                 return tevent_req_post(req, ev);
1672         }
1673         return req;
1674 }
1675
1676 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1677 {
1678         struct tevent_req *req =
1679                 tevent_req_callback_data(subreq,
1680                 struct tevent_req);
1681         struct smbXcli_req_state *state =
1682                 tevent_req_data(req,
1683                 struct smbXcli_req_state);
1684         ssize_t nwritten;
1685         int err;
1686
1687         state->write_req = NULL;
1688
1689         nwritten = writev_recv(subreq, &err);
1690         TALLOC_FREE(subreq);
1691         if (nwritten == -1) {
1692                 /* here, we need to notify all pending requests */
1693                 NTSTATUS status = map_nt_error_from_unix_common(err);
1694                 smbXcli_conn_disconnect(state->conn, status);
1695                 return;
1696         }
1697
1698         if (state->one_way) {
1699                 state->inbuf = NULL;
1700                 tevent_req_done(req);
1701                 return;
1702         }
1703 }
1704
1705 static void smbXcli_conn_received(struct tevent_req *subreq)
1706 {
1707         struct smbXcli_conn *conn =
1708                 tevent_req_callback_data(subreq,
1709                 struct smbXcli_conn);
1710         TALLOC_CTX *frame = talloc_stackframe();
1711         NTSTATUS status;
1712         uint8_t *inbuf;
1713         ssize_t received;
1714         int err;
1715
1716         if (subreq != conn->read_smb_req) {
1717                 DEBUG(1, ("Internal error: cli_smb_received called with "
1718                           "unexpected subreq\n"));
1719                 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1720                 TALLOC_FREE(frame);
1721                 return;
1722         }
1723         conn->read_smb_req = NULL;
1724
1725         received = read_smb_recv(subreq, frame, &inbuf, &err);
1726         TALLOC_FREE(subreq);
1727         if (received == -1) {
1728                 status = map_nt_error_from_unix_common(err);
1729                 smbXcli_conn_disconnect(conn, status);
1730                 TALLOC_FREE(frame);
1731                 return;
1732         }
1733
1734         status = conn->dispatch_incoming(conn, frame, inbuf);
1735         TALLOC_FREE(frame);
1736         if (NT_STATUS_IS_OK(status)) {
1737                 /*
1738                  * We should not do any more processing
1739                  * as the dispatch function called
1740                  * tevent_req_done().
1741                  */
1742                 return;
1743         }
1744
1745         if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1746                 /*
1747                  * We got an error, so notify all pending requests
1748                  */
1749                 smbXcli_conn_disconnect(conn, status);
1750                 return;
1751         }
1752
1753         /*
1754          * We got NT_STATUS_RETRY, so we may ask for a
1755          * next incoming pdu.
1756          */
1757         if (!smbXcli_conn_receive_next(conn)) {
1758                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1759         }
1760 }
1761
1762 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1763                                           struct iovec **piov, int *pnum_iov)
1764 {
1765         struct iovec *iov;
1766         int num_iov;
1767         size_t buflen;
1768         size_t taken;
1769         size_t remaining;
1770         uint8_t *hdr;
1771         uint8_t cmd;
1772         uint32_t wct_ofs;
1773         NTSTATUS status;
1774         size_t min_size = MIN_SMB_SIZE;
1775
1776         buflen = smb_len_tcp(buf);
1777         taken = 0;
1778
1779         hdr = buf + NBT_HDR_SIZE;
1780
1781         status = smb1cli_pull_raw_error(hdr);
1782         if (NT_STATUS_IS_ERR(status)) {
1783                 /*
1784                  * This is an ugly hack to support OS/2
1785                  * which skips the byte_count in the DATA block
1786                  * on some error responses.
1787                  *
1788                  * See bug #9096
1789                  */
1790                 min_size -= sizeof(uint16_t);
1791         }
1792
1793         if (buflen < min_size) {
1794                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1795         }
1796
1797         /*
1798          * This returns iovec elements in the following order:
1799          *
1800          * - SMB header
1801          *
1802          * - Parameter Block
1803          * - Data Block
1804          *
1805          * - Parameter Block
1806          * - Data Block
1807          *
1808          * - Parameter Block
1809          * - Data Block
1810          */
1811         num_iov = 1;
1812
1813         iov = talloc_array(mem_ctx, struct iovec, num_iov);
1814         if (iov == NULL) {
1815                 return NT_STATUS_NO_MEMORY;
1816         }
1817         iov[0].iov_base = hdr;
1818         iov[0].iov_len = HDR_WCT;
1819         taken += HDR_WCT;
1820
1821         cmd = CVAL(hdr, HDR_COM);
1822         wct_ofs = HDR_WCT;
1823
1824         while (true) {
1825                 size_t len = buflen - taken;
1826                 struct iovec *cur;
1827                 struct iovec *iov_tmp;
1828                 uint8_t wct;
1829                 uint32_t bcc_ofs;
1830                 uint16_t bcc;
1831                 size_t needed;
1832
1833                 /*
1834                  * we need at least WCT
1835                  */
1836                 needed = sizeof(uint8_t);
1837                 if (len < needed) {
1838                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1839                                    __location__, (int)len, (int)needed));
1840                         goto inval;
1841                 }
1842
1843                 /*
1844                  * Now we check if the specified words are there
1845                  */
1846                 wct = CVAL(hdr, wct_ofs);
1847                 needed += wct * sizeof(uint16_t);
1848                 if (len < needed) {
1849                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1850                                    __location__, (int)len, (int)needed));
1851                         goto inval;
1852                 }
1853
1854                 if ((num_iov == 1) &&
1855                     (len == needed) &&
1856                     NT_STATUS_IS_ERR(status))
1857                 {
1858                         /*
1859                          * This is an ugly hack to support OS/2
1860                          * which skips the byte_count in the DATA block
1861                          * on some error responses.
1862                          *
1863                          * See bug #9096
1864                          */
1865                         iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1866                                                  num_iov + 2);
1867                         if (iov_tmp == NULL) {
1868                                 TALLOC_FREE(iov);
1869                                 return NT_STATUS_NO_MEMORY;
1870                         }
1871                         iov = iov_tmp;
1872                         cur = &iov[num_iov];
1873                         num_iov += 2;
1874
1875                         cur[0].iov_len = 0;
1876                         cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1877                         cur[1].iov_len = 0;
1878                         cur[1].iov_base = cur[0].iov_base;
1879
1880                         taken += needed;
1881                         break;
1882                 }
1883
1884                 /*
1885                  * we need at least BCC
1886                  */
1887                 needed += sizeof(uint16_t);
1888                 if (len < needed) {
1889                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1890                                    __location__, (int)len, (int)needed));
1891                         goto inval;
1892                 }
1893
1894                 /*
1895                  * Now we check if the specified bytes are there
1896                  */
1897                 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1898                 bcc = SVAL(hdr, bcc_ofs);
1899                 needed += bcc * sizeof(uint8_t);
1900                 if (len < needed) {
1901                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1902                                    __location__, (int)len, (int)needed));
1903                         goto inval;
1904                 }
1905
1906                 /*
1907                  * we allocate 2 iovec structures for words and bytes
1908                  */
1909                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1910                                          num_iov + 2);
1911                 if (iov_tmp == NULL) {
1912                         TALLOC_FREE(iov);
1913                         return NT_STATUS_NO_MEMORY;
1914                 }
1915                 iov = iov_tmp;
1916                 cur = &iov[num_iov];
1917                 num_iov += 2;
1918
1919                 cur[0].iov_len = wct * sizeof(uint16_t);
1920                 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1921                 cur[1].iov_len = bcc * sizeof(uint8_t);
1922                 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1923
1924                 taken += needed;
1925
1926                 if (!smb1cli_is_andx_req(cmd)) {
1927                         /*
1928                          * If the current command does not have AndX chanining
1929                          * we are done.
1930                          */
1931                         break;
1932                 }
1933
1934                 if (wct == 0 && bcc == 0) {
1935                         /*
1936                          * An empty response also ends the chain,
1937                          * most likely with an error.
1938                          */
1939                         break;
1940                 }
1941
1942                 if (wct < 2) {
1943                         DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1944                                    __location__, (int)wct, (int)cmd));
1945                         goto inval;
1946                 }
1947                 cmd = CVAL(cur[0].iov_base, 0);
1948                 if (cmd == 0xFF) {
1949                         /*
1950                          * If it is the end of the chain we are also done.
1951                          */
1952                         break;
1953                 }
1954                 wct_ofs = SVAL(cur[0].iov_base, 2);
1955
1956                 if (wct_ofs < taken) {
1957                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1958                 }
1959                 if (wct_ofs > buflen) {
1960                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1961                 }
1962
1963                 /*
1964                  * we consumed everything up to the start of the next
1965                  * parameter block.
1966                  */
1967                 taken = wct_ofs;
1968         }
1969
1970         remaining = buflen - taken;
1971
1972         if (remaining > 0 && num_iov >= 3) {
1973                 /*
1974                  * The last DATA block gets the remaining
1975                  * bytes, this is needed to support
1976                  * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1977                  */
1978                 iov[num_iov-1].iov_len += remaining;
1979         }
1980
1981         *piov = iov;
1982         *pnum_iov = num_iov;
1983         return NT_STATUS_OK;
1984
1985 inval:
1986         TALLOC_FREE(iov);
1987         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1988 }
1989
1990 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1991                                                TALLOC_CTX *tmp_mem,
1992                                                uint8_t *inbuf)
1993 {
1994         struct tevent_req *req;
1995         struct smbXcli_req_state *state;
1996         NTSTATUS status;
1997         size_t num_pending;
1998         size_t i;
1999         uint8_t cmd;
2000         uint16_t mid;
2001         bool oplock_break;
2002         uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
2003         size_t len = smb_len_tcp(inbuf);
2004         struct iovec *iov = NULL;
2005         int num_iov = 0;
2006         struct tevent_req **chain = NULL;
2007         size_t num_chained = 0;
2008         size_t num_responses = 0;
2009
2010         if (conn->smb1.read_braw_req != NULL) {
2011                 req = conn->smb1.read_braw_req;
2012                 conn->smb1.read_braw_req = NULL;
2013                 state = tevent_req_data(req, struct smbXcli_req_state);
2014
2015                 smbXcli_req_unset_pending(req);
2016
2017                 if (state->smb1.recv_iov == NULL) {
2018                         /*
2019                          * For requests with more than
2020                          * one response, we have to readd the
2021                          * recv_iov array.
2022                          */
2023                         state->smb1.recv_iov = talloc_zero_array(state,
2024                                                                  struct iovec,
2025                                                                  3);
2026                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2027                                 return NT_STATUS_OK;
2028                         }
2029                 }
2030
2031                 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
2032                 state->smb1.recv_iov[0].iov_len = len;
2033                 ZERO_STRUCT(state->smb1.recv_iov[1]);
2034                 ZERO_STRUCT(state->smb1.recv_iov[2]);
2035
2036                 state->smb1.recv_cmd = SMBreadBraw;
2037                 state->smb1.recv_status = NT_STATUS_OK;
2038                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2039
2040                 tevent_req_done(req);
2041                 return NT_STATUS_OK;
2042         }
2043
2044         if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
2045             && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
2046                 DEBUG(10, ("Got non-SMB PDU\n"));
2047                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2048         }
2049
2050         /*
2051          * If we supported multiple encrytion contexts
2052          * here we'd look up based on tid.
2053          */
2054         if (common_encryption_on(conn->smb1.trans_enc)
2055             && (CVAL(inbuf, 0) == 0)) {
2056                 uint16_t enc_ctx_num;
2057
2058                 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
2059                 if (!NT_STATUS_IS_OK(status)) {
2060                         DEBUG(10, ("get_enc_ctx_num returned %s\n",
2061                                    nt_errstr(status)));
2062                         return status;
2063                 }
2064
2065                 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
2066                         DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
2067                                    enc_ctx_num,
2068                                    conn->smb1.trans_enc->enc_ctx_num));
2069                         return NT_STATUS_INVALID_HANDLE;
2070                 }
2071
2072                 status = common_decrypt_buffer(conn->smb1.trans_enc,
2073                                                (char *)inbuf);
2074                 if (!NT_STATUS_IS_OK(status)) {
2075                         DEBUG(10, ("common_decrypt_buffer returned %s\n",
2076                                    nt_errstr(status)));
2077                         return status;
2078                 }
2079                 inhdr = inbuf + NBT_HDR_SIZE;
2080                 len = smb_len_nbt(inbuf);
2081         }
2082
2083         mid = SVAL(inhdr, HDR_MID);
2084         num_pending = talloc_array_length(conn->pending);
2085
2086         for (i=0; i<num_pending; i++) {
2087                 if (mid == smb1cli_req_mid(conn->pending[i])) {
2088                         break;
2089                 }
2090         }
2091         if (i == num_pending) {
2092                 /* Dump unexpected reply */
2093                 return NT_STATUS_RETRY;
2094         }
2095
2096         oplock_break = false;
2097
2098         if (mid == 0xffff) {
2099                 /*
2100                  * Paranoia checks that this is really an oplock break request.
2101                  */
2102                 oplock_break = (len == 51); /* hdr + 8 words */
2103                 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2104                 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2105                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2106                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2107
2108                 if (!oplock_break) {
2109                         /* Dump unexpected reply */
2110                         return NT_STATUS_RETRY;
2111                 }
2112         }
2113
2114         req = conn->pending[i];
2115         state = tevent_req_data(req, struct smbXcli_req_state);
2116
2117         if (!oplock_break /* oplock breaks are not signed */
2118             && !smb_signing_check_pdu(conn->smb1.signing,
2119                                       inhdr, len, state->smb1.seqnum+1)) {
2120                 DEBUG(10, ("cli_check_sign_mac failed\n"));
2121                 return NT_STATUS_ACCESS_DENIED;
2122         }
2123
2124         status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2125                                            &iov, &num_iov);
2126         if (!NT_STATUS_IS_OK(status)) {
2127                 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2128                           nt_errstr(status)));
2129                 return status;
2130         }
2131
2132         cmd = CVAL(inhdr, HDR_COM);
2133         status = smb1cli_pull_raw_error(inhdr);
2134
2135         if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2136             (state->session != NULL) && state->session->disconnect_expired)
2137         {
2138                 /*
2139                  * this should be a short term hack
2140                  * until the upper layers have implemented
2141                  * re-authentication.
2142                  */
2143                 return status;
2144         }
2145
2146         if (state->smb1.chained_requests == NULL) {
2147                 if (num_iov != 3) {
2148                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2149                 }
2150
2151                 smbXcli_req_unset_pending(req);
2152
2153                 if (state->smb1.recv_iov == NULL) {
2154                         /*
2155                          * For requests with more than
2156                          * one response, we have to readd the
2157                          * recv_iov array.
2158                          */
2159                         state->smb1.recv_iov = talloc_zero_array(state,
2160                                                                  struct iovec,
2161                                                                  3);
2162                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2163                                 return NT_STATUS_OK;
2164                         }
2165                 }
2166
2167                 state->smb1.recv_cmd = cmd;
2168                 state->smb1.recv_status = status;
2169                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2170
2171                 state->smb1.recv_iov[0] = iov[0];
2172                 state->smb1.recv_iov[1] = iov[1];
2173                 state->smb1.recv_iov[2] = iov[2];
2174
2175                 if (talloc_array_length(conn->pending) == 0) {
2176                         tevent_req_done(req);
2177                         return NT_STATUS_OK;
2178                 }
2179
2180                 tevent_req_defer_callback(req, state->ev);
2181                 tevent_req_done(req);
2182                 return NT_STATUS_RETRY;
2183         }
2184
2185         chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2186         num_chained = talloc_array_length(chain);
2187         num_responses = (num_iov - 1)/2;
2188
2189         if (num_responses > num_chained) {
2190                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2191         }
2192
2193         for (i=0; i<num_chained; i++) {
2194                 size_t iov_idx = 1 + (i*2);
2195                 struct iovec *cur = &iov[iov_idx];
2196                 uint8_t *inbuf_ref;
2197
2198                 req = chain[i];
2199                 state = tevent_req_data(req, struct smbXcli_req_state);
2200
2201                 smbXcli_req_unset_pending(req);
2202
2203                 /*
2204                  * as we finish multiple requests here
2205                  * we need to defer the callbacks as
2206                  * they could destroy our current stack state.
2207                  */
2208                 tevent_req_defer_callback(req, state->ev);
2209
2210                 if (i >= num_responses) {
2211                         tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2212                         continue;
2213                 }
2214
2215                 if (state->smb1.recv_iov == NULL) {
2216                         /*
2217                          * For requests with more than
2218                          * one response, we have to readd the
2219                          * recv_iov array.
2220                          */
2221                         state->smb1.recv_iov = talloc_zero_array(state,
2222                                                                  struct iovec,
2223                                                                  3);
2224                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2225                                 continue;
2226                         }
2227                 }
2228
2229                 state->smb1.recv_cmd = cmd;
2230
2231                 if (i == (num_responses - 1)) {
2232                         /*
2233                          * The last request in the chain gets the status
2234                          */
2235                         state->smb1.recv_status = status;
2236                 } else {
2237                         cmd = CVAL(cur[0].iov_base, 0);
2238                         state->smb1.recv_status = NT_STATUS_OK;
2239                 }
2240
2241                 state->inbuf = inbuf;
2242
2243                 /*
2244                  * Note: here we use talloc_reference() in a way
2245                  *       that does not expose it to the caller.
2246                  */
2247                 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2248                 if (tevent_req_nomem(inbuf_ref, req)) {
2249                         continue;
2250                 }
2251
2252                 /* copy the related buffers */
2253                 state->smb1.recv_iov[0] = iov[0];
2254                 state->smb1.recv_iov[1] = cur[0];
2255                 state->smb1.recv_iov[2] = cur[1];
2256
2257                 tevent_req_done(req);
2258         }
2259
2260         return NT_STATUS_RETRY;
2261 }
2262
2263 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2264                           TALLOC_CTX *mem_ctx,
2265                           struct iovec **piov,
2266                           uint8_t **phdr,
2267                           uint8_t *pwct,
2268                           uint16_t **pvwv,
2269                           uint32_t *pvwv_offset,
2270                           uint32_t *pnum_bytes,
2271                           uint8_t **pbytes,
2272                           uint32_t *pbytes_offset,
2273                           uint8_t **pinbuf,
2274                           const struct smb1cli_req_expected_response *expected,
2275                           size_t num_expected)
2276 {
2277         struct smbXcli_req_state *state =
2278                 tevent_req_data(req,
2279                 struct smbXcli_req_state);
2280         NTSTATUS status = NT_STATUS_OK;
2281         struct iovec *recv_iov = NULL;
2282         uint8_t *hdr = NULL;
2283         uint8_t wct = 0;
2284         uint32_t vwv_offset = 0;
2285         uint16_t *vwv = NULL;
2286         uint32_t num_bytes = 0;
2287         uint32_t bytes_offset = 0;
2288         uint8_t *bytes = NULL;
2289         size_t i;
2290         bool found_status = false;
2291         bool found_size = false;
2292
2293         if (piov != NULL) {
2294                 *piov = NULL;
2295         }
2296         if (phdr != NULL) {
2297                 *phdr = 0;
2298         }
2299         if (pwct != NULL) {
2300                 *pwct = 0;
2301         }
2302         if (pvwv != NULL) {
2303                 *pvwv = NULL;
2304         }
2305         if (pvwv_offset != NULL) {
2306                 *pvwv_offset = 0;
2307         }
2308         if (pnum_bytes != NULL) {
2309                 *pnum_bytes = 0;
2310         }
2311         if (pbytes != NULL) {
2312                 *pbytes = NULL;
2313         }
2314         if (pbytes_offset != NULL) {
2315                 *pbytes_offset = 0;
2316         }
2317         if (pinbuf != NULL) {
2318                 *pinbuf = NULL;
2319         }
2320
2321         if (state->inbuf != NULL) {
2322                 recv_iov = state->smb1.recv_iov;
2323                 state->smb1.recv_iov = NULL;
2324                 if (state->smb1.recv_cmd != SMBreadBraw) {
2325                         hdr = (uint8_t *)recv_iov[0].iov_base;
2326                         wct = recv_iov[1].iov_len/2;
2327                         vwv = (uint16_t *)recv_iov[1].iov_base;
2328                         vwv_offset = PTR_DIFF(vwv, hdr);
2329                         num_bytes = recv_iov[2].iov_len;
2330                         bytes = (uint8_t *)recv_iov[2].iov_base;
2331                         bytes_offset = PTR_DIFF(bytes, hdr);
2332                 }
2333         }
2334
2335         if (tevent_req_is_nterror(req, &status)) {
2336                 for (i=0; i < num_expected; i++) {
2337                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
2338                                 found_status = true;
2339                                 break;
2340                         }
2341                 }
2342
2343                 if (found_status) {
2344                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2345                 }
2346
2347                 return status;
2348         }
2349
2350         if (num_expected == 0) {
2351                 found_status = true;
2352                 found_size = true;
2353         }
2354
2355         status = state->smb1.recv_status;
2356
2357         for (i=0; i < num_expected; i++) {
2358                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2359                         continue;
2360                 }
2361
2362                 found_status = true;
2363                 if (expected[i].wct == 0) {
2364                         found_size = true;
2365                         break;
2366                 }
2367
2368                 if (expected[i].wct == wct) {
2369                         found_size = true;
2370                         break;
2371                 }
2372         }
2373
2374         if (!found_status) {
2375                 return status;
2376         }
2377
2378         if (!found_size) {
2379                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2380         }
2381
2382         if (piov != NULL) {
2383                 *piov = talloc_move(mem_ctx, &recv_iov);
2384         }
2385
2386         if (phdr != NULL) {
2387                 *phdr = hdr;
2388         }
2389         if (pwct != NULL) {
2390                 *pwct = wct;
2391         }
2392         if (pvwv != NULL) {
2393                 *pvwv = vwv;
2394         }
2395         if (pvwv_offset != NULL) {
2396                 *pvwv_offset = vwv_offset;
2397         }
2398         if (pnum_bytes != NULL) {
2399                 *pnum_bytes = num_bytes;
2400         }
2401         if (pbytes != NULL) {
2402                 *pbytes = bytes;
2403         }
2404         if (pbytes_offset != NULL) {
2405                 *pbytes_offset = bytes_offset;
2406         }
2407         if (pinbuf != NULL) {
2408                 *pinbuf = state->inbuf;
2409         }
2410
2411         return status;
2412 }
2413
2414 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2415 {
2416         size_t wct_ofs;
2417         int i;
2418
2419         wct_ofs = HDR_WCT;
2420
2421         for (i=0; i<num_reqs; i++) {
2422                 struct smbXcli_req_state *state;
2423                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2424                 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2425                                            state->smb1.iov_count-2);
2426                 wct_ofs = (wct_ofs + 3) & ~3;
2427         }
2428         return wct_ofs;
2429 }
2430
2431 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2432 {
2433         struct smbXcli_req_state *first_state =
2434                 tevent_req_data(reqs[0],
2435                 struct smbXcli_req_state);
2436         struct smbXcli_req_state *state;
2437         size_t wct_offset;
2438         size_t chain_padding = 0;
2439         int i, iovlen;
2440         struct iovec *iov = NULL;
2441         struct iovec *this_iov;
2442         NTSTATUS status;
2443         ssize_t nbt_len;
2444
2445         if (num_reqs == 1) {
2446                 return smb1cli_req_writev_submit(reqs[0], first_state,
2447                                                  first_state->smb1.iov,
2448                                                  first_state->smb1.iov_count);
2449         }
2450
2451         iovlen = 0;
2452         for (i=0; i<num_reqs; i++) {
2453                 if (!tevent_req_is_in_progress(reqs[i])) {
2454                         return NT_STATUS_INTERNAL_ERROR;
2455                 }
2456
2457                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2458
2459                 if (state->smb1.iov_count < 4) {
2460                         return NT_STATUS_INVALID_PARAMETER_MIX;
2461                 }
2462
2463                 if (i == 0) {
2464                         /*
2465                          * The NBT and SMB header
2466                          */
2467                         iovlen += 2;
2468                 } else {
2469                         /*
2470                          * Chain padding
2471                          */
2472                         iovlen += 1;
2473                 }
2474
2475                 /*
2476                  * words and bytes
2477                  */
2478                 iovlen += state->smb1.iov_count - 2;
2479         }
2480
2481         iov = talloc_zero_array(first_state, struct iovec, iovlen);
2482         if (iov == NULL) {
2483                 return NT_STATUS_NO_MEMORY;
2484         }
2485
2486         first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2487                 first_state, reqs, sizeof(*reqs) * num_reqs);
2488         if (first_state->smb1.chained_requests == NULL) {
2489                 TALLOC_FREE(iov);
2490                 return NT_STATUS_NO_MEMORY;
2491         }
2492
2493         wct_offset = HDR_WCT;
2494         this_iov = iov;
2495
2496         for (i=0; i<num_reqs; i++) {
2497                 size_t next_padding = 0;
2498                 uint16_t *vwv;
2499
2500                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2501
2502                 if (i < num_reqs-1) {
2503                         if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2504                             || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2505                                 TALLOC_FREE(iov);
2506                                 TALLOC_FREE(first_state->smb1.chained_requests);
2507                                 return NT_STATUS_INVALID_PARAMETER_MIX;
2508                         }
2509                 }
2510
2511                 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2512                                               state->smb1.iov_count-2) + 1;
2513                 if ((wct_offset % 4) != 0) {
2514                         next_padding = 4 - (wct_offset % 4);
2515                 }
2516                 wct_offset += next_padding;
2517                 vwv = state->smb1.vwv;
2518
2519                 if (i < num_reqs-1) {
2520                         struct smbXcli_req_state *next_state =
2521                                 tevent_req_data(reqs[i+1],
2522                                 struct smbXcli_req_state);
2523                         SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2524                         SCVAL(vwv+0, 1, 0);
2525                         SSVAL(vwv+1, 0, wct_offset);
2526                 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2527                         /* properly end the chain */
2528                         SCVAL(vwv+0, 0, 0xff);
2529                         SCVAL(vwv+0, 1, 0xff);
2530                         SSVAL(vwv+1, 0, 0);
2531                 }
2532
2533                 if (i == 0) {
2534                         /*
2535                          * The NBT and SMB header
2536                          */
2537                         this_iov[0] = state->smb1.iov[0];
2538                         this_iov[1] = state->smb1.iov[1];
2539                         this_iov += 2;
2540                 } else {
2541                         /*
2542                          * This one is a bit subtle. We have to add
2543                          * chain_padding bytes between the requests, and we
2544                          * have to also include the wct field of the
2545                          * subsequent requests. We use the subsequent header
2546                          * for the padding, it contains the wct field in its
2547                          * last byte.
2548                          */
2549                         this_iov[0].iov_len = chain_padding+1;
2550                         this_iov[0].iov_base = (void *)&state->smb1.hdr[
2551                                 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2552                         memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2553                         this_iov += 1;
2554                 }
2555
2556                 /*
2557                  * copy the words and bytes
2558                  */
2559                 memcpy(this_iov, state->smb1.iov+2,
2560                        sizeof(struct iovec) * (state->smb1.iov_count-2));
2561                 this_iov += state->smb1.iov_count - 2;
2562                 chain_padding = next_padding;
2563         }
2564
2565         nbt_len = iov_buflen(&iov[1], iovlen-1);
2566         if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
2567                 TALLOC_FREE(iov);
2568                 TALLOC_FREE(first_state->smb1.chained_requests);
2569                 return NT_STATUS_INVALID_PARAMETER_MIX;
2570         }
2571
2572         status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2573         if (!NT_STATUS_IS_OK(status)) {
2574                 TALLOC_FREE(iov);
2575                 TALLOC_FREE(first_state->smb1.chained_requests);
2576                 return status;
2577         }
2578
2579         return NT_STATUS_OK;
2580 }
2581
2582 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2583 {
2584         return ((tevent_queue_length(conn->outgoing) != 0)
2585                 || (talloc_array_length(conn->pending) != 0));
2586 }
2587
2588 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2589 {
2590         if (conn->protocol >= PROTOCOL_SMB2_02) {
2591                 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2592         }
2593
2594         return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2595 }
2596
2597 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2598 {
2599         uint16_t credits = 1;
2600
2601         if (conn->smb2.cur_credits == 0) {
2602                 if (max_dyn_len != NULL) {
2603                         *max_dyn_len = 0;
2604                 }
2605                 return false;
2606         }
2607
2608         if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2609                 credits = conn->smb2.cur_credits;
2610         }
2611
2612         if (max_dyn_len != NULL) {
2613                 *max_dyn_len = credits * 65536;
2614         }
2615
2616         return true;
2617 }
2618
2619 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2620 {
2621         return conn->smb2.server.capabilities;
2622 }
2623
2624 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2625 {
2626         return conn->smb2.server.security_mode;
2627 }
2628
2629 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2630 {
2631         return conn->smb2.server.max_trans_size;
2632 }
2633
2634 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2635 {
2636         return conn->smb2.server.max_read_size;
2637 }
2638
2639 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2640 {
2641         return conn->smb2.server.max_write_size;
2642 }
2643
2644 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2645                                   uint16_t max_credits)
2646 {
2647         conn->smb2.max_credits = max_credits;
2648 }
2649
2650 uint8_t smb2cli_conn_get_io_priority(struct smbXcli_conn *conn)
2651 {
2652         if (conn->protocol < PROTOCOL_SMB3_11) {
2653                 return 0;
2654         }
2655
2656         return conn->smb2.io_priority;
2657 }
2658
2659 void smb2cli_conn_set_io_priority(struct smbXcli_conn *conn,
2660                                   uint8_t io_priority)
2661 {
2662         conn->smb2.io_priority = io_priority;
2663 }
2664
2665 uint32_t smb2cli_conn_cc_chunk_len(struct smbXcli_conn *conn)
2666 {
2667         return conn->smb2.cc_chunk_len;
2668 }
2669
2670 void smb2cli_conn_set_cc_chunk_len(struct smbXcli_conn *conn,
2671                                     uint32_t chunk_len)
2672 {
2673         conn->smb2.cc_chunk_len = chunk_len;
2674 }
2675
2676 uint32_t smb2cli_conn_cc_max_chunks(struct smbXcli_conn *conn)
2677 {
2678         return conn->smb2.cc_max_chunks;
2679 }
2680
2681 void smb2cli_conn_set_cc_max_chunks(struct smbXcli_conn *conn,
2682                                     uint32_t max_chunks)
2683 {
2684         conn->smb2.cc_max_chunks = max_chunks;
2685 }
2686
2687 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2688
2689 static bool smb2cli_req_cancel(struct tevent_req *req)
2690 {
2691         struct smbXcli_req_state *state =
2692                 tevent_req_data(req,
2693                 struct smbXcli_req_state);
2694         struct smbXcli_tcon *tcon = state->tcon;
2695         struct smbXcli_session *session = state->session;
2696         uint8_t *fixed = state->smb2.pad;
2697         uint16_t fixed_len = 4;
2698         struct tevent_req *subreq;
2699         struct smbXcli_req_state *substate;
2700         NTSTATUS status;
2701
2702         SSVAL(fixed, 0, 0x04);
2703         SSVAL(fixed, 2, 0);
2704
2705         subreq = smb2cli_req_create(state, state->ev,
2706                                     state->conn,
2707                                     SMB2_OP_CANCEL,
2708                                     0, 0, /* flags */
2709                                     0, /* timeout */
2710                                     tcon, session,
2711                                     fixed, fixed_len,
2712                                     NULL, 0, 0);
2713         if (subreq == NULL) {
2714                 return false;
2715         }
2716         substate = tevent_req_data(subreq, struct smbXcli_req_state);
2717
2718         SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, state->smb2.cancel_flags);
2719         SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, state->smb2.cancel_mid);
2720         SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, state->smb2.cancel_aid);
2721
2722         status = smb2cli_req_compound_submit(&subreq, 1);
2723         if (!NT_STATUS_IS_OK(status)) {
2724                 TALLOC_FREE(subreq);
2725                 return false;
2726         }
2727
2728         tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2729
2730         return true;
2731 }
2732
2733 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2734 {
2735         /* we do not care about the result */
2736         TALLOC_FREE(subreq);
2737 }
2738
2739 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2740                                       struct tevent_context *ev,
2741                                       struct smbXcli_conn *conn,
2742                                       uint16_t cmd,
2743                                       uint32_t additional_flags,
2744                                       uint32_t clear_flags,
2745                                       uint32_t timeout_msec,
2746                                       struct smbXcli_tcon *tcon,
2747                                       struct smbXcli_session *session,
2748                                       const uint8_t *fixed,
2749                                       uint16_t fixed_len,
2750                                       const uint8_t *dyn,
2751                                       uint32_t dyn_len,
2752                                       uint32_t max_dyn_len)
2753 {
2754         struct tevent_req *req;
2755         struct smbXcli_req_state *state;
2756         uint32_t flags = 0;
2757         uint32_t tid = 0;
2758         uint64_t uid = 0;
2759         bool use_channel_sequence = false;
2760         uint16_t channel_sequence = 0;
2761         bool use_replay_flag = false;
2762
2763         req = tevent_req_create(mem_ctx, &state,
2764                                 struct smbXcli_req_state);
2765         if (req == NULL) {
2766                 return NULL;
2767         }
2768
2769         state->ev = ev;
2770         state->conn = conn;
2771         state->session = session;
2772         state->tcon = tcon;
2773
2774         if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2775                 use_channel_sequence = true;
2776         } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2777                 use_channel_sequence = true;
2778         }
2779
2780         if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
2781                 use_replay_flag = true;
2782         }
2783
2784         if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_11) {
2785                 flags |= SMB2_PRIORITY_VALUE_TO_MASK(conn->smb2.io_priority);
2786         }
2787
2788         if (session) {
2789                 uid = session->smb2->session_id;
2790
2791                 if (use_channel_sequence) {
2792                         channel_sequence = session->smb2->channel_sequence;
2793                 }
2794
2795                 if (use_replay_flag && session->smb2->replay_active) {
2796                         additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
2797                 }
2798
2799                 state->smb2.should_sign = session->smb2->should_sign;
2800                 state->smb2.should_encrypt = session->smb2->should_encrypt;
2801
2802                 if (cmd == SMB2_OP_SESSSETUP &&
2803                     session->smb2_channel.signing_key.length == 0 &&
2804                     session->smb2->signing_key.length != 0)
2805                 {
2806                         /*
2807                          * a session bind needs to be signed
2808                          */
2809                         state->smb2.should_sign = true;
2810                 }
2811
2812                 if (cmd == SMB2_OP_SESSSETUP &&
2813                     session->smb2_channel.signing_key.length == 0) {
2814                         state->smb2.should_encrypt = false;
2815                 }
2816
2817                 if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
2818                         if (session->smb2_channel.signing_key.length == 0) {
2819                                 tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
2820                                 return req;
2821                         }
2822
2823                         additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
2824                         state->smb2.should_sign = true;
2825                 }
2826         }
2827
2828         if (tcon) {
2829                 tid = tcon->smb2.tcon_id;
2830
2831                 if (tcon->smb2.should_sign) {
2832                         state->smb2.should_sign = true;
2833                 }
2834                 if (tcon->smb2.should_encrypt) {
2835                         state->smb2.should_encrypt = true;
2836                 }
2837         }
2838
2839         if (state->smb2.should_encrypt) {
2840                 state->smb2.should_sign = false;
2841         }
2842
2843         state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2844         if (state->smb2.recv_iov == NULL) {
2845                 TALLOC_FREE(req);
2846                 return NULL;
2847         }
2848
2849         flags |= additional_flags;
2850         flags &= ~clear_flags;
2851
2852         state->smb2.fixed = fixed;
2853         state->smb2.fixed_len = fixed_len;
2854         state->smb2.dyn = dyn;
2855         state->smb2.dyn_len = dyn_len;
2856         state->smb2.max_dyn_len = max_dyn_len;
2857
2858         if (state->smb2.should_encrypt) {
2859                 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2860                 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2861         }
2862
2863         SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID,    SMB2_MAGIC);
2864         SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH,         SMB2_HDR_BODY);
2865         SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE,         cmd);
2866         SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2867         SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS,          flags);
2868         SIVAL(state->smb2.hdr, SMB2_HDR_PID,            0); /* reserved */
2869         SIVAL(state->smb2.hdr, SMB2_HDR_TID,            tid);
2870         SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID,     uid);
2871
2872         switch (cmd) {
2873         case SMB2_OP_CANCEL:
2874                 state->one_way = true;
2875                 break;
2876         case SMB2_OP_BREAK:
2877                 /*
2878                  * If this is a dummy request, it will have
2879                  * UINT64_MAX as message id.
2880                  * If we send on break acknowledgement,
2881                  * this gets overwritten later.
2882                  */
2883                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2884                 break;
2885         }
2886
2887         if (timeout_msec > 0) {
2888                 struct timeval endtime;
2889
2890                 endtime = timeval_current_ofs_msec(timeout_msec);
2891                 if (!tevent_req_set_endtime(req, ev, endtime)) {
2892                         return req;
2893                 }
2894         }
2895
2896         return req;
2897 }
2898
2899 void smb2cli_req_set_notify_async(struct tevent_req *req)
2900 {
2901         struct smbXcli_req_state *state =
2902                 tevent_req_data(req,
2903                 struct smbXcli_req_state);
2904
2905         state->smb2.notify_async = true;
2906 }
2907
2908 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2909 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2910                                                TALLOC_CTX *tmp_mem,
2911                                                uint8_t *inbuf);
2912
2913 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2914                                      int num_reqs)
2915 {
2916         struct smbXcli_req_state *state;
2917         struct tevent_req *subreq;
2918         struct iovec *iov;
2919         int i, num_iov, nbt_len;
2920         int tf_iov = -1;
2921         const DATA_BLOB *encryption_key = NULL;
2922         uint64_t encryption_session_id = 0;
2923         uint64_t nonce_high = UINT64_MAX;
2924         uint64_t nonce_low = UINT64_MAX;
2925
2926         /*
2927          * 1 for the nbt length, optional TRANSFORM
2928          * per request: HDR, fixed, dyn, padding
2929          * -1 because the last one does not need padding
2930          */
2931
2932         iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2933         if (iov == NULL) {
2934                 return NT_STATUS_NO_MEMORY;
2935         }
2936
2937         num_iov = 1;
2938         nbt_len = 0;
2939
2940         /*
2941          * the session of the first request that requires encryption
2942          * specifies the encryption key.
2943          */
2944         for (i=0; i<num_reqs; i++) {
2945                 if (!tevent_req_is_in_progress(reqs[i])) {
2946                         return NT_STATUS_INTERNAL_ERROR;
2947                 }
2948
2949                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2950
2951                 if (!smbXcli_conn_is_connected(state->conn)) {
2952                         return NT_STATUS_CONNECTION_DISCONNECTED;
2953                 }
2954
2955                 if ((state->conn->protocol != PROTOCOL_NONE) &&
2956                     (state->conn->protocol < PROTOCOL_SMB2_02)) {
2957                         return NT_STATUS_REVISION_MISMATCH;
2958                 }
2959
2960                 if (state->session == NULL) {
2961                         continue;
2962                 }
2963
2964                 if (!state->smb2.should_encrypt) {
2965                         continue;
2966                 }
2967
2968                 encryption_key = &state->session->smb2->encryption_key;
2969                 if (encryption_key->length == 0) {
2970                         return NT_STATUS_INVALID_PARAMETER_MIX;
2971                 }
2972
2973                 encryption_session_id = state->session->smb2->session_id;
2974
2975                 state->session->smb2->nonce_low += 1;
2976                 if (state->session->smb2->nonce_low == 0) {
2977                         state->session->smb2->nonce_high += 1;
2978                         state->session->smb2->nonce_low += 1;
2979                 }
2980
2981                 /*
2982                  * CCM and GCM algorithms must never have their
2983                  * nonce wrap, or the security of the whole
2984                  * communication and the keys is destroyed.
2985                  * We must drop the connection once we have
2986                  * transfered too much data.
2987                  *
2988                  * NOTE: We assume nonces greater than 8 bytes.
2989                  */
2990                 if (state->session->smb2->nonce_high >=
2991                     state->session->smb2->nonce_high_max)
2992                 {
2993                         return NT_STATUS_ENCRYPTION_FAILED;
2994                 }
2995
2996                 nonce_high = state->session->smb2->nonce_high_random;
2997                 nonce_high += state->session->smb2->nonce_high;
2998                 nonce_low = state->session->smb2->nonce_low;
2999
3000                 tf_iov = num_iov;
3001                 iov[num_iov].iov_base = state->smb2.transform;
3002                 iov[num_iov].iov_len  = sizeof(state->smb2.transform);
3003                 num_iov += 1;
3004
3005                 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3006                 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
3007                       nonce_low);
3008                 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
3009                       nonce_high);
3010                 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
3011                       encryption_session_id);
3012
3013                 nbt_len += SMB2_TF_HDR_SIZE;
3014                 break;
3015         }
3016
3017         for (i=0; i<num_reqs; i++) {
3018                 int hdr_iov;
3019                 size_t reqlen;
3020                 bool ret;
3021                 uint16_t opcode;
3022                 uint64_t avail;
3023                 uint16_t charge;
3024                 uint16_t credits;
3025                 uint64_t mid;
3026                 const DATA_BLOB *signing_key = NULL;
3027
3028                 if (!tevent_req_is_in_progress(reqs[i])) {
3029                         return NT_STATUS_INTERNAL_ERROR;
3030                 }
3031
3032                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3033
3034                 if (!smbXcli_conn_is_connected(state->conn)) {
3035                         return NT_STATUS_CONNECTION_DISCONNECTED;
3036                 }
3037
3038                 if ((state->conn->protocol != PROTOCOL_NONE) &&
3039                     (state->conn->protocol < PROTOCOL_SMB2_02)) {
3040                         return NT_STATUS_REVISION_MISMATCH;
3041                 }
3042
3043                 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3044                 if (opcode == SMB2_OP_CANCEL) {
3045                         goto skip_credits;
3046                 }
3047
3048                 avail = UINT64_MAX - state->conn->smb2.mid;
3049                 if (avail < 1) {
3050                         return NT_STATUS_CONNECTION_ABORTED;
3051                 }
3052
3053                 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3054                         uint32_t max_dyn_len = 1;
3055
3056                         max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
3057                         max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
3058
3059                         charge = (max_dyn_len - 1)/ 65536 + 1;
3060                 } else {
3061                         charge = 1;
3062                 }
3063
3064                 charge = MAX(state->smb2.credit_charge, charge);
3065
3066                 avail = MIN(avail, state->conn->smb2.cur_credits);
3067                 if (avail < charge) {
3068                         return NT_STATUS_INTERNAL_ERROR;
3069                 }
3070
3071                 credits = 0;
3072                 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
3073                         credits = state->conn->smb2.max_credits -
3074                                   state->conn->smb2.cur_credits;
3075                 }
3076                 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
3077                         credits += 1;
3078                 }
3079
3080                 mid = state->conn->smb2.mid;
3081                 state->conn->smb2.mid += charge;
3082                 state->conn->smb2.cur_credits -= charge;
3083
3084                 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3085                         SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
3086                 }
3087                 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
3088                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
3089
3090                 state->smb2.cancel_flags = 0;
3091                 state->smb2.cancel_mid = mid;
3092                 state->smb2.cancel_aid = 0;
3093
3094 skip_credits:
3095                 if (state->session && encryption_key == NULL) {
3096                         /*
3097                          * We prefer the channel signing key if it is
3098                          * already there.
3099                          */
3100                         if (state->smb2.should_sign) {
3101                                 signing_key = &state->session->smb2_channel.signing_key;
3102                         }
3103
3104                         /*
3105                          * If it is a channel binding, we already have the main
3106                          * signing key and try that one.
3107                          */
3108                         if (signing_key && signing_key->length == 0) {
3109                                 signing_key = &state->session->smb2->signing_key;
3110                         }
3111
3112                         /*
3113                          * If we do not have any session key yet, we skip the
3114                          * signing of SMB2_OP_SESSSETUP requests.
3115                          */
3116                         if (signing_key && signing_key->length == 0) {
3117                                 signing_key = NULL;
3118                         }
3119                 }
3120
3121                 hdr_iov = num_iov;
3122                 iov[num_iov].iov_base = state->smb2.hdr;
3123                 iov[num_iov].iov_len  = sizeof(state->smb2.hdr);
3124                 num_iov += 1;
3125
3126                 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
3127                 iov[num_iov].iov_len  = state->smb2.fixed_len;
3128                 num_iov += 1;
3129
3130                 if (state->smb2.dyn != NULL) {
3131                         iov[num_iov].iov_base = discard_const(state->smb2.dyn);
3132                         iov[num_iov].iov_len  = state->smb2.dyn_len;
3133                         num_iov += 1;
3134                 }
3135
3136                 reqlen  = sizeof(state->smb2.hdr);
3137                 reqlen += state->smb2.fixed_len;
3138                 reqlen += state->smb2.dyn_len;
3139
3140                 if (i < num_reqs-1) {
3141                         if ((reqlen % 8) > 0) {
3142                                 uint8_t pad = 8 - (reqlen % 8);
3143                                 iov[num_iov].iov_base = state->smb2.pad;
3144                                 iov[num_iov].iov_len = pad;
3145                                 num_iov += 1;
3146                                 reqlen += pad;
3147                         }
3148                         SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
3149                 }
3150
3151                 state->smb2.encryption_session_id = encryption_session_id;
3152
3153                 if (signing_key != NULL) {
3154                         NTSTATUS status;
3155
3156                         status = smb2_signing_sign_pdu(*signing_key,
3157                                                        state->session->conn->protocol,
3158                                                        &iov[hdr_iov], num_iov - hdr_iov);
3159                         if (!NT_STATUS_IS_OK(status)) {
3160                                 return status;
3161                         }
3162                 }
3163
3164                 nbt_len += reqlen;
3165
3166                 ret = smbXcli_req_set_pending(reqs[i]);
3167                 if (!ret) {
3168                         return NT_STATUS_NO_MEMORY;
3169                 }
3170         }
3171
3172         state = tevent_req_data(reqs[0], struct smbXcli_req_state);
3173         _smb_setlen_tcp(state->length_hdr, nbt_len);
3174         iov[0].iov_base = state->length_hdr;
3175         iov[0].iov_len  = sizeof(state->length_hdr);
3176
3177         if (encryption_key != NULL) {
3178                 NTSTATUS status;
3179                 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
3180                 uint8_t *buf;
3181                 int vi;
3182
3183                 buf = talloc_array(iov, uint8_t, buflen);
3184                 if (buf == NULL) {
3185                         return NT_STATUS_NO_MEMORY;
3186                 }
3187
3188                 /*
3189                  * We copy the buffers before encrypting them,
3190                  * this is at least currently needed for the
3191                  * to keep state->smb2.hdr.
3192                  *
3193                  * Also the callers may expect there buffers
3194                  * to be const.
3195                  */
3196                 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3197                         struct iovec *v = &iov[vi];
3198                         const uint8_t *o = (const uint8_t *)v->iov_base;
3199
3200                         memcpy(buf, o, v->iov_len);
3201                         v->iov_base = (void *)buf;
3202                         buf += v->iov_len;
3203                 }
3204
3205                 status = smb2_signing_encrypt_pdu(*encryption_key,
3206                                         state->conn->smb2.server.cipher,
3207                                         &iov[tf_iov], num_iov - tf_iov);
3208                 if (!NT_STATUS_IS_OK(status)) {
3209                         return status;
3210                 }
3211         }
3212
3213         if (state->conn->dispatch_incoming == NULL) {
3214                 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3215         }
3216
3217         subreq = writev_send(state, state->ev, state->conn->outgoing,
3218                              state->conn->sock_fd, false, iov, num_iov);
3219         if (subreq == NULL) {
3220                 return NT_STATUS_NO_MEMORY;
3221         }
3222         tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3223         state->write_req = subreq;
3224
3225         return NT_STATUS_OK;
3226 }
3227
3228 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3229 {
3230         struct smbXcli_req_state *state =
3231                 tevent_req_data(req,
3232                 struct smbXcli_req_state);
3233
3234         state->smb2.credit_charge = charge;
3235 }
3236
3237 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3238                                     struct tevent_context *ev,
3239                                     struct smbXcli_conn *conn,
3240                                     uint16_t cmd,
3241                                     uint32_t additional_flags,
3242                                     uint32_t clear_flags,
3243                                     uint32_t timeout_msec,
3244                                     struct smbXcli_tcon *tcon,
3245                                     struct smbXcli_session *session,
3246                                     const uint8_t *fixed,
3247                                     uint16_t fixed_len,
3248                                     const uint8_t *dyn,
3249                                     uint32_t dyn_len,
3250                                     uint32_t max_dyn_len)
3251 {
3252         struct tevent_req *req;
3253         NTSTATUS status;
3254
3255         req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3256                                  additional_flags, clear_flags,
3257                                  timeout_msec,
3258                                  tcon, session,
3259                                  fixed, fixed_len,
3260                                  dyn, dyn_len,
3261                                  max_dyn_len);
3262         if (req == NULL) {
3263                 return NULL;
3264         }
3265         if (!tevent_req_is_in_progress(req)) {
3266                 return tevent_req_post(req, ev);
3267         }
3268         status = smb2cli_req_compound_submit(&req, 1);
3269         if (tevent_req_nterror(req, status)) {
3270                 return tevent_req_post(req, ev);
3271         }
3272         return req;
3273 }
3274
3275 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3276 {
3277         struct tevent_req *req =
3278                 tevent_req_callback_data(subreq,
3279                 struct tevent_req);
3280         struct smbXcli_req_state *state =
3281                 tevent_req_data(req,
3282                 struct smbXcli_req_state);
3283         ssize_t nwritten;
3284         int err;
3285
3286         state->write_req = NULL;
3287
3288         nwritten = writev_recv(subreq, &err);
3289         TALLOC_FREE(subreq);
3290         if (nwritten == -1) {
3291                 /* here, we need to notify all pending requests */
3292                 NTSTATUS status = map_nt_error_from_unix_common(err);
3293                 smbXcli_conn_disconnect(state->conn, status);
3294                 return;
3295         }
3296 }
3297
3298 static struct smbXcli_session* smbXcli_session_by_uid(struct smbXcli_conn *conn,
3299                                                      uint64_t uid)
3300 {
3301         struct smbXcli_session *s = conn->sessions;
3302
3303         for (; s; s = s->next) {
3304                 if (s->smb2->session_id != uid) {
3305                         continue;
3306                 }
3307                 break;
3308         }
3309
3310         return s;
3311 }
3312
3313 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3314                                              uint8_t *buf,
3315                                              size_t buflen,
3316                                              TALLOC_CTX *mem_ctx,
3317                                              struct iovec **piov, int *pnum_iov)
3318 {
3319         struct iovec *iov;
3320         int num_iov = 0;
3321         size_t taken = 0;
3322         uint8_t *first_hdr = buf;
3323         size_t verified_buflen = 0;
3324         uint8_t *tf = NULL;
3325         size_t tf_len = 0;
3326
3327         iov = talloc_array(mem_ctx, struct iovec, num_iov);
3328         if (iov == NULL) {
3329                 return NT_STATUS_NO_MEMORY;
3330         }
3331
3332         while (taken < buflen) {
3333                 size_t len = buflen - taken;
3334                 uint8_t *hdr = first_hdr + taken;
3335                 struct iovec *cur;
3336                 size_t full_size;
3337                 size_t next_command_ofs;
3338                 uint16_t body_size;
3339                 struct iovec *iov_tmp;
3340
3341                 if (verified_buflen > taken) {
3342                         len = verified_buflen - taken;
3343                 } else {
3344                         tf = NULL;
3345                         tf_len = 0;
3346                 }
3347
3348                 if (len < 4) {
3349                         DEBUG(10, ("%d bytes left, expected at least %d\n",
3350                                    (int)len, 4));
3351                         goto inval;
3352                 }
3353                 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3354                         struct smbXcli_session *s;
3355                         uint64_t uid;
3356                         struct iovec tf_iov[2];
3357                         size_t enc_len;
3358                         NTSTATUS status;
3359
3360                         if (len < SMB2_TF_HDR_SIZE) {
3361                                 DEBUG(10, ("%d bytes left, expected at least %d\n",
3362                                            (int)len, SMB2_TF_HDR_SIZE));
3363                                 goto inval;
3364                         }
3365                         tf = hdr;
3366                         tf_len = SMB2_TF_HDR_SIZE;
3367                         taken += tf_len;
3368
3369                         hdr = first_hdr + taken;
3370                         enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3371                         uid = BVAL(tf, SMB2_TF_SESSION_ID);
3372
3373                         if (len < SMB2_TF_HDR_SIZE + enc_len) {
3374                                 DEBUG(10, ("%d bytes left, expected at least %d\n",
3375                                            (int)len,
3376                                            (int)(SMB2_TF_HDR_SIZE + enc_len)));
3377                                 goto inval;
3378                         }
3379
3380                         s = smbXcli_session_by_uid(conn, uid);
3381                         if (s == NULL) {
3382                                 DEBUG(10, ("unknown session_id %llu\n",
3383                                            (unsigned long long)uid));
3384                                 goto inval;
3385                         }
3386
3387                         tf_iov[0].iov_base = (void *)tf;
3388                         tf_iov[0].iov_len = tf_len;
3389                         tf_iov[1].iov_base = (void *)hdr;
3390                         tf_iov[1].iov_len = enc_len;
3391
3392                         status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3393                                                           conn->smb2.server.cipher,
3394                                                           tf_iov, 2);
3395                         if (!NT_STATUS_IS_OK(status)) {
3396                                 TALLOC_FREE(iov);
3397                                 return status;
3398                         }
3399
3400                         verified_buflen = taken + enc_len;
3401                         len = enc_len;
3402                 }
3403
3404                 /*
3405                  * We need the header plus the body length field
3406                  */
3407
3408                 if (len < SMB2_HDR_BODY + 2) {
3409                         DEBUG(10, ("%d bytes left, expected at least %d\n",
3410                                    (int)len, SMB2_HDR_BODY));
3411                         goto inval;
3412                 }
3413                 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3414                         DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3415                                    IVAL(hdr, 0)));
3416                         goto inval;
3417                 }
3418                 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3419                         DEBUG(10, ("Got HDR len %d, expected %d\n",
3420                                    SVAL(hdr, 4), SMB2_HDR_BODY));
3421                         goto inval;
3422                 }
3423
3424                 full_size = len;
3425                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3426                 body_size = SVAL(hdr, SMB2_HDR_BODY);
3427
3428                 if (next_command_ofs != 0) {
3429                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3430                                 goto inval;
3431                         }
3432                         if (next_command_ofs > full_size) {
3433                                 goto inval;
3434                         }
3435                         full_size = next_command_ofs;
3436                 }
3437                 if (body_size < 2) {
3438                         goto inval;
3439                 }
3440                 body_size &= 0xfffe;
3441
3442                 if (body_size > (full_size - SMB2_HDR_BODY)) {
3443                         goto inval;
3444                 }
3445
3446                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3447                                          num_iov + 4);
3448                 if (iov_tmp == NULL) {
3449                         TALLOC_FREE(iov);
3450                         return NT_STATUS_NO_MEMORY;
3451                 }
3452                 iov = iov_tmp;
3453                 cur = &iov[num_iov];
3454                 num_iov += 4;
3455
3456                 cur[0].iov_base = tf;
3457                 cur[0].iov_len  = tf_len;
3458                 cur[1].iov_base = hdr;
3459                 cur[1].iov_len  = SMB2_HDR_BODY;
3460                 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3461                 cur[2].iov_len  = body_size;
3462                 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3463                 cur[3].iov_len  = full_size - (SMB2_HDR_BODY + body_size);
3464
3465                 taken += full_size;
3466         }
3467
3468         *piov = iov;
3469         *pnum_iov = num_iov;
3470         return NT_STATUS_OK;
3471
3472 inval:
3473         TALLOC_FREE(iov);
3474         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3475 }
3476
3477 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3478                                                     uint64_t mid)
3479 {
3480         size_t num_pending = talloc_array_length(conn->pending);
3481         size_t i;
3482
3483         for (i=0; i<num_pending; i++) {
3484                 struct tevent_req *req = conn->pending[i];
3485                 struct smbXcli_req_state *state =
3486                         tevent_req_data(req,
3487                         struct smbXcli_req_state);
3488
3489                 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3490                         return req;
3491                 }
3492         }
3493         return NULL;
3494 }
3495
3496 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3497                                                TALLOC_CTX *tmp_mem,
3498                                                uint8_t *inbuf)
3499 {
3500         struct tevent_req *req;
3501         struct smbXcli_req_state *state = NULL;
3502         struct iovec *iov;
3503         int i, num_iov;
3504         NTSTATUS status;
3505         bool defer = true;
3506         struct smbXcli_session *last_session = NULL;
3507         size_t inbuf_len = smb_len_tcp(inbuf);
3508
3509         status = smb2cli_inbuf_parse_compound(conn,
3510                                               inbuf + NBT_HDR_SIZE,
3511                                               inbuf_len,
3512                                               tmp_mem,
3513                                               &iov, &num_iov);
3514         if (!NT_STATUS_IS_OK(status)) {
3515                 return status;
3516         }
3517
3518         for (i=0; i<num_iov; i+=4) {
3519                 uint8_t *inbuf_ref = NULL;
3520                 struct iovec *cur = &iov[i];
3521                 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3522                 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3523                 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3524                 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3525                 uint16_t req_opcode;
3526                 uint32_t req_flags;
3527                 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3528                 uint32_t new_credits;
3529                 struct smbXcli_session *session = NULL;
3530                 const DATA_BLOB *signing_key = NULL;
3531                 bool was_encrypted = false;
3532
3533                 new_credits = conn->smb2.cur_credits;
3534                 new_credits += credits;
3535                 if (new_credits > UINT16_MAX) {
3536                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3537                 }
3538                 conn->smb2.cur_credits += credits;
3539
3540                 req = smb2cli_conn_find_pending(conn, mid);
3541                 if (req == NULL) {
3542                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3543                 }
3544                 state = tevent_req_data(req, struct smbXcli_req_state);
3545
3546                 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3547                 if (opcode != req_opcode) {
3548                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3549                 }
3550                 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3551
3552                 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3553                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3554                 }
3555
3556                 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3557                 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3558                     NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3559                         uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3560
3561                         if (state->smb2.got_async) {
3562                                 /* We only expect one STATUS_PENDING response */
3563                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3564                         }
3565                         state->smb2.got_async = true;
3566
3567                         /*
3568                          * async interim responses are not signed,
3569                          * even if the SMB2_HDR_FLAG_SIGNED flag
3570                          * is set.
3571                          */
3572                         state->smb2.cancel_flags = SMB2_HDR_FLAG_ASYNC;
3573                         state->smb2.cancel_mid = 0;
3574                         state->smb2.cancel_aid = async_id;
3575
3576                         if (state->smb2.notify_async) {
3577                                 tevent_req_defer_callback(req, state->ev);
3578                                 tevent_req_notify_callback(req);
3579                         }
3580                         continue;
3581                 }
3582
3583                 session = state->session;
3584                 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3585                         session = last_session;
3586                 }
3587                 last_session = session;
3588
3589                 if (state->smb2.should_sign) {
3590                         if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3591                                 return NT_STATUS_ACCESS_DENIED;
3592                         }
3593                 }
3594
3595                 if (flags & SMB2_HDR_FLAG_SIGNED) {
3596                         uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3597
3598                         if (session == NULL) {
3599                                 session = smbXcli_session_by_uid(state->conn,
3600                                                                  uid);
3601                         }
3602
3603                         if (session == NULL) {
3604                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3605                         }
3606
3607                         last_session = session;
3608                         signing_key = &session->smb2_channel.signing_key;
3609                 }
3610
3611                 if (opcode == SMB2_OP_SESSSETUP) {
3612                         /*
3613                          * We prefer the channel signing key, if it is
3614                          * already there.
3615                          *
3616                          * If we do not have a channel signing key yet,
3617                          * we try the main signing key, if it is not
3618                          * the final response.
3619                          */
3620                         if (signing_key && signing_key->length == 0 &&
3621                             !NT_STATUS_IS_OK(status)) {
3622                                 signing_key = &session->smb2->signing_key;
3623                         }
3624
3625                         if (signing_key && signing_key->length == 0) {
3626                                 /*
3627                                  * If we do not have a session key to
3628                                  * verify the signature, we defer the
3629                                  * signing check to the caller.
3630                                  *
3631                                  * The caller gets NT_STATUS_OK, it
3632                                  * has to call
3633                                  * smb2cli_session_set_session_key()
3634                                  * or
3635                                  * smb2cli_session_set_channel_key()
3636                                  * which will check the signature
3637                                  * with the channel signing key.
3638                                  */
3639                                 signing_key = NULL;
3640                         }
3641                 }
3642
3643                 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3644                         const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3645                         uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3646
3647                         /*
3648                          * If the response was encrypted in a SMB2_TRANSFORM
3649                          * pdu, which belongs to the correct session,
3650                          * we do not need to do signing checks
3651                          *
3652                          * It could be the session the response belongs to
3653                          * or the session that was used to encrypt the
3654                          * SMB2_TRANSFORM request.
3655                          */
3656                         if ((session && session->smb2->session_id == uid) ||
3657                             (state->smb2.encryption_session_id == uid)) {
3658                                 signing_key = NULL;
3659                                 was_encrypted = true;
3660                         }
3661                 }
3662
3663                 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3664                         /*
3665                          * if the server returns NT_STATUS_USER_SESSION_DELETED
3666                          * the response is not signed and we should
3667                          * propagate the NT_STATUS_USER_SESSION_DELETED
3668                          * status to the caller.
3669                          */
3670                         state->smb2.signing_skipped = true;
3671                         signing_key = NULL;
3672                 }
3673
3674                 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3675                         /*
3676                          * if the server returns
3677                          * NT_STATUS_INVALID_PARAMETER
3678                          * the response might not be encrypted.
3679                          */
3680                         if (state->smb2.should_encrypt && !was_encrypted) {
3681                                 state->smb2.signing_skipped = true;
3682                                 signing_key = NULL;
3683                         }
3684                 }
3685
3686                 if (state->smb2.should_encrypt && !was_encrypted) {
3687                         if (!state->smb2.signing_skipped) {
3688                                 return NT_STATUS_ACCESS_DENIED;
3689                         }
3690                 }
3691
3692                 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3693                     NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3694                     NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3695                         /*
3696                          * if the server returns
3697                          * NT_STATUS_NETWORK_NAME_DELETED
3698                          * NT_STATUS_FILE_CLOSED
3699                          * NT_STATUS_INVALID_PARAMETER
3700                          * the response might not be signed
3701                          * as this happens before the signing checks.
3702                          *
3703                          * If server echos the signature (or all zeros)
3704                          * we should report the status from the server
3705                          * to the caller.
3706                          */
3707                         if (signing_key) {
3708                                 int cmp;
3709
3710                                 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3711                                              state->smb2.hdr+SMB2_HDR_SIGNATURE,
3712                                              16);
3713                                 if (cmp == 0) {
3714                                         state->smb2.signing_skipped = true;
3715                                         signing_key = NULL;
3716                                 }
3717                         }
3718                         if (signing_key) {
3719                                 int cmp;
3720                                 static const uint8_t zeros[16];
3721
3722                                 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3723                                              zeros,
3724                                              16);
3725                                 if (cmp == 0) {
3726                                         state->smb2.signing_skipped = true;
3727                                         signing_key = NULL;
3728                                 }
3729                         }
3730                 }
3731
3732                 if (signing_key) {
3733                         status = smb2_signing_check_pdu(*signing_key,
3734                                                         state->conn->protocol,
3735                                                         &cur[1], 3);
3736                         if (!NT_STATUS_IS_OK(status)) {
3737                                 /*
3738                                  * If the signing check fails, we disconnect
3739                                  * the connection.
3740                                  */
3741                                 return status;
3742                         }
3743                 }
3744
3745                 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3746                     (session != NULL) && session->disconnect_expired)
3747                 {
3748                         /*
3749                          * this should be a short term hack
3750                          * until the upper layers have implemented
3751                          * re-authentication.
3752                          */
3753                         return status;
3754                 }
3755
3756                 smbXcli_req_unset_pending(req);
3757
3758                 /*
3759                  * There might be more than one response
3760                  * we need to defer the notifications
3761                  */
3762                 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3763                         defer = false;
3764                 }
3765
3766                 if (defer) {
3767                         tevent_req_defer_callback(req, state->ev);
3768                 }
3769
3770                 /*
3771                  * Note: here we use talloc_reference() in a way
3772                  *       that does not expose it to the caller.
3773                  */
3774                 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3775                 if (tevent_req_nomem(inbuf_ref, req)) {
3776                         continue;
3777                 }
3778
3779                 /* copy the related buffers */
3780                 state->smb2.recv_iov[0] = cur[1];
3781                 state->smb2.recv_iov[1] = cur[2];
3782                 state->smb2.recv_iov[2] = cur[3];
3783
3784                 tevent_req_done(req);
3785         }
3786
3787         if (defer) {
3788                 return NT_STATUS_RETRY;
3789         }
3790
3791         return NT_STATUS_OK;
3792 }
3793
3794 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3795                           struct iovec **piov,
3796                           const struct smb2cli_req_expected_response *expected,
3797                           size_t num_expected)
3798 {
3799         struct smbXcli_req_state *state =
3800                 tevent_req_data(req,
3801                 struct smbXcli_req_state);
3802         NTSTATUS status;
3803         size_t body_size;
3804         bool found_status = false;
3805         bool found_size = false;
3806         size_t i;
3807
3808         if (piov != NULL) {
3809                 *piov = NULL;
3810         }
3811
3812         if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
3813                 return STATUS_PENDING;
3814         }
3815
3816         if (tevent_req_is_nterror(req, &status)) {
3817                 for (i=0; i < num_expected; i++) {
3818                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
3819                                 found_status = true;
3820                                 break;
3821                         }
3822                 }
3823
3824                 if (found_status) {
3825                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3826                 }
3827
3828                 return status;
3829         }
3830
3831         if (num_expected == 0) {
3832                 found_status = true;
3833                 found_size = true;
3834         }
3835
3836         status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3837         body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3838
3839         for (i=0; i < num_expected; i++) {
3840                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3841                         continue;
3842                 }
3843
3844                 found_status = true;
3845                 if (expected[i].body_size == 0) {
3846                         found_size = true;
3847                         break;
3848                 }
3849
3850                 if (expected[i].body_size == body_size) {
3851                         found_size = true;
3852                         break;
3853                 }
3854         }
3855
3856         if (!found_status) {
3857                 return status;
3858         }
3859
3860         if (state->smb2.signing_skipped) {
3861                 if (num_expected > 0) {
3862                         return NT_STATUS_ACCESS_DENIED;
3863                 }
3864                 if (!NT_STATUS_IS_ERR(status)) {
3865                         return NT_STATUS_ACCESS_DENIED;
3866                 }
3867         }
3868
3869         if (!found_size) {
3870                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3871         }
3872
3873         if (piov != NULL) {
3874                 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3875         }
3876
3877         return status;
3878 }
3879
3880 NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
3881                                   struct iovec *sent_iov)
3882 {
3883         struct smbXcli_req_state *state =
3884                 tevent_req_data(req,
3885                 struct smbXcli_req_state);
3886
3887         if (tevent_req_is_in_progress(req)) {
3888                 return STATUS_PENDING;
3889         }
3890
3891         sent_iov[0].iov_base = state->smb2.hdr;
3892         sent_iov[0].iov_len  = sizeof(state->smb2.hdr);
3893
3894         sent_iov[1].iov_base = discard_const(state->smb2.fixed);
3895         sent_iov[1].iov_len  = state->smb2.fixed_len;
3896
3897         if (state->smb2.dyn != NULL) {
3898                 sent_iov[2].iov_base = discard_const(state->smb2.dyn);
3899                 sent_iov[2].iov_len  = state->smb2.dyn_len;
3900         } else {
3901                 sent_iov[2].iov_base = NULL;
3902                 sent_iov[2].iov_len  = 0;
3903         }
3904
3905         return NT_STATUS_OK;
3906 }
3907
3908 static const struct {
3909         enum protocol_types proto;
3910         const char *smb1_name;
3911 } smb1cli_prots[] = {
3912         {PROTOCOL_CORE,         "PC NETWORK PROGRAM 1.0"},
3913         {PROTOCOL_COREPLUS,     "MICROSOFT NETWORKS 1.03"},
3914         {PROTOCOL_LANMAN1,      "MICROSOFT NETWORKS 3.0"},
3915         {PROTOCOL_LANMAN1,      "LANMAN1.0"},
3916         {PROTOCOL_LANMAN2,      "LM1.2X002"},
3917         {PROTOCOL_LANMAN2,      "DOS LANMAN2.1"},
3918         {PROTOCOL_LANMAN2,      "LANMAN2.1"},
3919         {PROTOCOL_LANMAN2,      "Samba"},
3920         {PROTOCOL_NT1,          "NT LANMAN 1.0"},
3921         {PROTOCOL_NT1,          "NT LM 0.12"},
3922         {PROTOCOL_SMB2_02,      "SMB 2.002"},
3923         {PROTOCOL_SMB2_10,      "SMB 2.???"},
3924 };
3925
3926 static const struct {
3927         enum protocol_types proto;
3928         uint16_t smb2_dialect;
3929 } smb2cli_prots[] = {
3930         {PROTOCOL_SMB2_02,      SMB2_DIALECT_REVISION_202},
3931         {PROTOCOL_SMB2_10,      SMB2_DIALECT_REVISION_210},
3932         {PROTOCOL_SMB2_22,      SMB2_DIALECT_REVISION_222},
3933         {PROTOCOL_SMB2_24,      SMB2_DIALECT_REVISION_224},
3934         {PROTOCOL_SMB3_00,      SMB3_DIALECT_REVISION_300},
3935         {PROTOCOL_SMB3_02,      SMB3_DIALECT_REVISION_302},
3936         {PROTOCOL_SMB3_10,      SMB3_DIALECT_REVISION_310},
3937         {PROTOCOL_SMB3_11,      SMB3_DIALECT_REVISION_311},
3938 };
3939
3940 struct smbXcli_negprot_state {
3941         struct smbXcli_conn *conn;
3942         struct tevent_context *ev;
3943         uint32_t timeout_msec;
3944
3945         struct {
3946                 uint8_t fixed[36];
3947         } smb2;
3948 };
3949
3950 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3951 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3952 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3953 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3954 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3955 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3956                                                   TALLOC_CTX *frame,
3957                                                   uint8_t *inbuf);
3958
3959 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3960                                         struct tevent_context *ev,
3961                                         struct smbXcli_conn *conn,
3962                                         uint32_t timeout_msec,
3963                                         enum protocol_types min_protocol,
3964                                         enum protocol_types max_protocol)
3965 {
3966         struct tevent_req *req, *subreq;
3967         struct smbXcli_negprot_state *state;
3968
3969         req = tevent_req_create(mem_ctx, &state,
3970                                 struct smbXcli_negprot_state);
3971         if (req == NULL) {
3972                 return NULL;
3973         }
3974         state->conn = conn;
3975         state->ev = ev;
3976         state->timeout_msec = timeout_msec;
3977
3978         if (min_protocol == PROTOCOL_NONE) {
3979                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3980                 return tevent_req_post(req, ev);
3981         }
3982
3983         if (max_protocol == PROTOCOL_NONE) {
3984                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3985                 return tevent_req_post(req, ev);
3986         }
3987
3988         if (min_protocol > max_protocol) {
3989                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3990                 return tevent_req_post(req, ev);
3991         }
3992
3993         conn->min_protocol = min_protocol;
3994         conn->max_protocol = max_protocol;
3995         conn->protocol = PROTOCOL_NONE;
3996
3997         if ((min_protocol < PROTOCOL_SMB2_02) &&
3998             (max_protocol < PROTOCOL_SMB2_02)) {
3999                 /*
4000                  * SMB1 only...
4001                  */
4002                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4003
4004                 subreq = smbXcli_negprot_smb1_subreq(state);
4005                 if (tevent_req_nomem(subreq, req)) {
4006                         return tevent_req_post(req, ev);
4007                 }
4008                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4009                 return req;
4010         }
4011
4012         if ((min_protocol >= PROTOCOL_SMB2_02) &&
4013             (max_protocol >= PROTOCOL_SMB2_02)) {
4014                 /*
4015                  * SMB2 only...
4016                  */
4017                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4018
4019                 /*
4020                  * As we're starting with an SMB2 negprot, emulate Windows
4021                  * and ask for 31 credits in the initial SMB2 negprot.
4022                  * If we don't and leave requested credits at
4023                  * zero, MacOSX servers return zero credits on
4024                  * the negprot reply and we fail to connect.
4025                  */
4026                 smb2cli_conn_set_max_credits(conn,
4027                         WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK);
4028
4029                 subreq = smbXcli_negprot_smb2_subreq(state);
4030                 if (tevent_req_nomem(subreq, req)) {
4031                         return tevent_req_post(req, ev);
4032                 }
4033                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4034                 return req;
4035         }
4036
4037         /*
4038          * We send an SMB1 negprot with the SMB2 dialects
4039          * and expect a SMB1 or a SMB2 response.
4040          *
4041          * smbXcli_negprot_dispatch_incoming() will fix the
4042          * callback to match protocol of the response.
4043          */
4044         conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
4045
4046         subreq = smbXcli_negprot_smb1_subreq(state);
4047         if (tevent_req_nomem(subreq, req)) {
4048                 return tevent_req_post(req, ev);
4049         }
4050         tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
4051         return req;
4052 }
4053
4054 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
4055 {
4056         struct tevent_req *req =
4057                 tevent_req_callback_data(subreq,
4058                 struct tevent_req);
4059         NTSTATUS status;
4060
4061         /*
4062          * we just want the low level error
4063          */
4064         status = tevent_req_simple_recv_ntstatus(subreq);
4065         TALLOC_FREE(subreq);
4066         if (tevent_req_nterror(req, status)) {
4067                 return;
4068         }
4069
4070         /* this should never happen */
4071         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4072 }
4073
4074 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
4075 {
4076         size_t i;
4077         DATA_BLOB bytes = data_blob_null;
4078         uint8_t flags;
4079         uint16_t flags2;
4080
4081         /* setup the protocol strings */
4082         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4083                 uint8_t c = 2;
4084                 bool ok;
4085
4086                 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4087                         continue;
4088                 }
4089
4090                 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4091                         continue;
4092                 }
4093
4094                 ok = data_blob_append(state, &bytes, &c, sizeof(c));
4095                 if (!ok) {
4096                         return NULL;
4097                 }
4098
4099                 /*
4100                  * We now it is already ascii and
4101                  * we want NULL termination.
4102                  */
4103                 ok = data_blob_append(state, &bytes,
4104                                       smb1cli_prots[i].smb1_name,
4105                                       strlen(smb1cli_prots[i].smb1_name)+1);
4106                 if (!ok) {
4107                         return NULL;
4108                 }
4109         }
4110
4111         smb1cli_req_flags(state->conn->max_protocol,
4112                           state->conn->smb1.client.capabilities,
4113                           SMBnegprot,
4114                           0, 0, &flags,
4115                           0, 0, &flags2);
4116
4117         return smb1cli_req_send(state, state->ev, state->conn,
4118                                 SMBnegprot,
4119                                 flags, ~flags,
4120                                 flags2, ~flags2,
4121                                 state->timeout_msec,
4122                                 0xFFFE, 0, NULL, /* pid, tid, session */
4123                                 0, NULL, /* wct, vwv */
4124                                 bytes.length, bytes.data);
4125 }
4126
4127 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
4128 {
4129         struct tevent_req *req =
4130                 tevent_req_callback_data(subreq,
4131                 struct tevent_req);
4132         struct smbXcli_negprot_state *state =
4133                 tevent_req_data(req,
4134                 struct smbXcli_negprot_state);
4135         struct smbXcli_conn *conn = state->conn;
4136         struct iovec *recv_iov = NULL;
4137         uint8_t *inhdr;
4138         uint8_t wct;
4139         uint16_t *vwv;
4140         uint32_t num_bytes;
4141         uint8_t *bytes;
4142         NTSTATUS status;
4143         uint16_t protnum;
4144         size_t i;
4145         size_t num_prots = 0;
4146         uint8_t flags;
4147         uint32_t client_capabilities = conn->smb1.client.capabilities;
4148         uint32_t both_capabilities;
4149         uint32_t server_capabilities = 0;
4150         uint32_t capabilities;
4151         uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4152         uint32_t server_max_xmit = 0;
4153         uint32_t max_xmit;
4154         uint32_t server_max_mux = 0;
4155         uint16_t server_security_mode = 0;
4156         uint32_t server_session_key = 0;
4157         bool server_readbraw = false;
4158         bool server_writebraw = false;
4159         bool server_lockread = false;
4160         bool server_writeunlock = false;
4161         struct GUID server_guid = GUID_zero();
4162         DATA_BLOB server_gss_blob = data_blob_null;
4163         uint8_t server_challenge[8];
4164         char *server_workgroup = NULL;
4165         char *server_name = NULL;
4166         int server_time_zone = 0;
4167         NTTIME server_system_time = 0;
4168         static const struct smb1cli_req_expected_response expected[] = {
4169         {
4170                 .status = NT_STATUS_OK,
4171                 .wct = 0x11, /* NT1 */
4172         },
4173         {
4174                 .status = NT_STATUS_OK,
4175                 .wct = 0x0D, /* LM */
4176         },
4177         {
4178                 .status = NT_STATUS_OK,
4179                 .wct = 0x01, /* CORE */
4180         }
4181         };
4182
4183         ZERO_STRUCT(server_challenge);
4184
4185         status = smb1cli_req_recv(subreq, state,
4186                                   &recv_iov,
4187                                   &inhdr,
4188                                   &wct,
4189                                   &vwv,
4190                                   NULL, /* pvwv_offset */
4191                                   &num_bytes,
4192                                   &bytes,
4193                                   NULL, /* pbytes_offset */
4194                                   NULL, /* pinbuf */
4195                                   expected, ARRAY_SIZE(expected));
4196         TALLOC_FREE(subreq);
4197         if (tevent_req_nterror(req, status)) {
4198                 return;
4199         }
4200
4201         flags = CVAL(inhdr, HDR_FLG);
4202
4203         protnum = SVAL(vwv, 0);
4204
4205         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4206                 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4207                         continue;
4208                 }
4209
4210                 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4211                         continue;
4212                 }
4213
4214                 if (protnum != num_prots) {
4215                         num_prots++;
4216                         continue;
4217                 }
4218
4219                 conn->protocol = smb1cli_prots[i].proto;
4220                 break;
4221         }
4222
4223         if (conn->protocol == PROTOCOL_NONE) {
4224                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4225                 return;
4226         }
4227
4228         if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4229                 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4230                          "and the selected protocol level doesn't support it.\n"));
4231                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4232                 return;
4233         }
4234
4235         if (flags & FLAG_SUPPORT_LOCKREAD) {
4236                 server_lockread = true;
4237                 server_writeunlock = true;
4238         }
4239
4240         if (conn->protocol >= PROTOCOL_NT1) {
4241                 const char *client_signing = NULL;
4242                 bool server_mandatory = false;
4243                 bool server_allowed = false;
4244                 const char *server_signing = NULL;
4245                 bool ok;
4246                 uint8_t key_len;
4247
4248                 if (wct != 0x11) {
4249                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4250                         return;
4251                 }
4252
4253                 /* NT protocol */
4254                 server_security_mode = CVAL(vwv + 1, 0);
4255                 server_max_mux = SVAL(vwv + 1, 1);
4256                 server_max_xmit = IVAL(vwv + 3, 1);
4257                 server_session_key = IVAL(vwv + 7, 1);
4258                 server_time_zone = SVALS(vwv + 15, 1);
4259                 server_time_zone *= 60;
4260                 /* this time arrives in real GMT */
4261                 server_system_time = BVAL(vwv + 11, 1);
4262                 server_capabilities = IVAL(vwv + 9, 1);
4263
4264                 key_len = CVAL(vwv + 16, 1);
4265
4266                 if (server_capabilities & CAP_RAW_MODE) {
4267                         server_readbraw = true;
4268                         server_writebraw = true;
4269                 }
4270                 if (server_capabilities & CAP_LOCK_AND_READ) {
4271                         server_lockread = true;
4272                 }
4273
4274                 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4275                         DATA_BLOB blob1, blob2;
4276
4277                         if (num_bytes < 16) {
4278                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4279                                 return;
4280                         }
4281
4282                         blob1 = data_blob_const(bytes, 16);
4283                         status = GUID_from_data_blob(&blob1, &server_guid);
4284                         if (tevent_req_nterror(req, status)) {
4285                                 return;
4286                         }
4287
4288                         blob1 = data_blob_const(bytes+16, num_bytes-16);
4289                         blob2 = data_blob_dup_talloc(state, blob1);
4290                         if (blob1.length > 0 &&
4291                             tevent_req_nomem(blob2.data, req)) {
4292                                 return;
4293                         }
4294                         server_gss_blob = blob2;
4295                 } else {
4296                         DATA_BLOB blob1, blob2;
4297
4298                         if (num_bytes < key_len) {
4299                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4300                                 return;
4301                         }
4302
4303                         if (key_len != 0 && key_len != 8) {
4304                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4305                                 return;
4306                         }
4307
4308                         if (key_len == 8) {
4309                                 memcpy(server_challenge, bytes, 8);
4310                         }
4311
4312                         blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4313                         blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4314                         if (blob1.length > 0) {
4315                                 size_t len;
4316
4317                                 len = utf16_len_n(blob1.data,
4318                                                   blob1.length);
4319                                 blob1.length = len;
4320
4321                                 ok = convert_string_talloc(state,
4322                                                            CH_UTF16LE,
4323                                                            CH_UNIX,
4324                                                            blob1.data,
4325                                                            blob1.length,
4326                                                            &server_workgroup,
4327                                                            &len);
4328                                 if (!ok) {
4329                                         status = map_nt_error_from_unix_common(errno);
4330                                         tevent_req_nterror(req, status);
4331                                         return;
4332                                 }
4333                         }
4334
4335                         blob2.data += blob1.length;
4336                         blob2.length -= blob1.length;
4337                         if (blob2.length > 0) {
4338                                 size_t len;
4339
4340                                 len = utf16_len_n(blob1.data,
4341                                                   blob1.length);
4342                                 blob1.length = len;
4343
4344                                 ok = convert_string_talloc(state,
4345                                                            CH_UTF16LE,
4346                                                            CH_UNIX,
4347                                                            blob2.data,
4348                                                            blob2.length,
4349                                                            &server_name,
4350                                                            &len);
4351                                 if (!ok) {
4352                                         status = map_nt_error_from_unix_common(errno);
4353                                         tevent_req_nterror(req, status);
4354                                         return;
4355                                 }
4356                         }
4357                 }
4358
4359                 client_signing = "disabled";
4360                 if (conn->allow_signing) {
4361                         client_signing = "allowed";
4362                 }
4363                 if (conn->mandatory_signing) {
4364                         client_signing = "required";
4365                 }
4366
4367                 server_signing = "not supported";
4368                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4369                         server_signing = "supported";
4370                         server_allowed = true;
4371                 } else if (conn->mandatory_signing) {
4372                         /*
4373                          * We have mandatory signing as client
4374                          * lets assume the server will look at our
4375                          * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4376                          * flag in the session setup
4377                          */
4378                         server_signing = "not announced";
4379                         server_allowed = true;
4380                 }
4381                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4382                         server_signing = "required";
4383                         server_mandatory = true;
4384                 }
4385
4386                 ok = smb_signing_set_negotiated(conn->smb1.signing,
4387                                                 server_allowed,
4388                                                 server_mandatory);
4389                 if (!ok) {
4390                         DEBUG(1,("cli_negprot: SMB signing is required, "
4391                                  "but client[%s] and server[%s] mismatch\n",
4392                                  client_signing, server_signing));
4393                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4394                         return;
4395                 }
4396
4397         } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4398                 DATA_BLOB blob1;
4399                 uint8_t key_len;
4400                 time_t t;
4401
4402                 if (wct != 0x0D) {
4403                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4404                         return;
4405                 }
4406
4407                 server_security_mode = SVAL(vwv + 1, 0);
4408                 server_max_xmit = SVAL(vwv + 2, 0);
4409                 server_max_mux = SVAL(vwv + 3, 0);
4410                 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4411                 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4412                 server_session_key = IVAL(vwv + 6, 0);
4413                 server_time_zone = SVALS(vwv + 10, 0);
4414                 server_time_zone *= 60;
4415                 /* this time is converted to GMT by make_unix_date */
4416                 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4417                 unix_to_nt_time(&server_system_time, t);
4418                 key_len = SVAL(vwv + 11, 0);
4419
4420                 if (num_bytes < key_len) {
4421                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4422                         return;
4423                 }
4424
4425                 if (key_len != 0 && key_len != 8) {
4426                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4427                         return;
4428                 }
4429
4430                 if (key_len == 8) {
4431                         memcpy(server_challenge, bytes, 8);
4432                 }
4433
4434                 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4435                 if (blob1.length > 0) {
4436                         size_t len;
4437                         bool ok;
4438
4439                         len = utf16_len_n(blob1.data,
4440                                           blob1.length);
4441                         blob1.length = len;
4442
4443                         ok = convert_string_talloc(state,
4444                                                    CH_DOS,
4445                                                    CH_UNIX,
4446                                                    blob1.data,
4447                                                    blob1.length,
4448                                                    &server_workgroup,
4449                                                    &len);
4450                         if (!ok) {
4451                                 status = map_nt_error_from_unix_common(errno);
4452                                 tevent_req_nterror(req, status);
4453                                 return;
4454                         }
4455                 }
4456
4457         } else {
4458                 /* the old core protocol */
4459                 server_time_zone = get_time_zone(time(NULL));
4460                 server_max_xmit = 1024;
4461                 server_max_mux = 1;
4462         }
4463
4464         if (server_max_xmit < 1024) {
4465                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4466                 return;
4467         }
4468
4469         if (server_max_mux < 1) {
4470                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4471                 return;
4472         }
4473
4474         /*
4475          * Now calculate the negotiated capabilities
4476          * based on the mask for:
4477          * - client only flags
4478          * - flags used in both directions
4479          * - server only flags
4480          */
4481         both_capabilities = client_capabilities & server_capabilities;
4482         capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4483         capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4484         capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4485
4486         max_xmit = MIN(client_max_xmit, server_max_xmit);
4487
4488         conn->smb1.server.capabilities = server_capabilities;
4489         conn->smb1.capabilities = capabilities;
4490
4491         conn->smb1.server.max_xmit = server_max_xmit;
4492         conn->smb1.max_xmit = max_xmit;
4493
4494         conn->smb1.server.max_mux = server_max_mux;
4495
4496         conn->smb1.server.security_mode = server_security_mode;
4497
4498         conn->smb1.server.readbraw = server_readbraw;
4499         conn->smb1.server.writebraw = server_writebraw;
4500         conn->smb1.server.lockread = server_lockread;
4501         conn->smb1.server.writeunlock = server_writeunlock;
4502
4503         conn->smb1.server.session_key = server_session_key;
4504
4505         talloc_steal(conn, server_gss_blob.data);
4506         conn->smb1.server.gss_blob = server_gss_blob;
4507         conn->smb1.server.guid = server_guid;
4508         memcpy(conn->smb1.server.challenge, server_challenge, 8);
4509         conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4510         conn->smb1.server.name = talloc_move(conn, &server_name);
4511
4512         conn->smb1.server.time_zone = server_time_zone;
4513         conn->smb1.server.system_time = server_system_time;
4514
4515         tevent_req_done(req);
4516 }
4517
4518 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4519 {
4520         if ((offset & (n-1)) == 0) return 0;
4521         return n - (offset & (n-1));
4522 }
4523
4524 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4525 {
4526         size_t i;
4527         uint8_t *buf;
4528         uint16_t dialect_count = 0;
4529         DATA_BLOB dyn = data_blob_null;
4530
4531         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4532                 bool ok;
4533                 uint8_t val[2];
4534
4535                 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4536                         continue;
4537                 }
4538
4539                 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4540                         continue;
4541                 }
4542
4543                 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4544
4545                 ok = data_blob_append(state, &dyn, val, sizeof(val));
4546                 if (!ok) {
4547                         return NULL;
4548                 }
4549
4550                 dialect_count++;
4551         }
4552
4553         buf = state->smb2.fixed;
4554         SSVAL(buf, 0, 36);
4555         SSVAL(buf, 2, dialect_count);
4556         SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4557         SSVAL(buf, 6, 0);       /* Reserved */
4558         if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4559                 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4560         } else {
4561                 SIVAL(buf, 8, 0);       /* Capabilities */
4562         }
4563         if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4564                 NTSTATUS status;
4565                 DATA_BLOB blob;
4566
4567                 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4568                                           state, &blob);
4569                 if (!NT_STATUS_IS_OK(status)) {
4570                         return NULL;
4571                 }
4572                 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4573         } else {
4574                 memset(buf+12, 0, 16);  /* ClientGuid */
4575         }
4576
4577         if (state->conn->max_protocol >= PROTOCOL_SMB3_10) {
4578                 NTSTATUS status;
4579                 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4580                 uint32_t offset;
4581                 DATA_BLOB b;
4582                 uint8_t p[38];
4583                 const uint8_t zeros[8] = {0, };
4584                 size_t pad;
4585                 bool ok;
4586
4587                 SSVAL(p, 0,  1); /* HashAlgorithmCount */
4588                 SSVAL(p, 2, 32); /* SaltLength */
4589                 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4590                 generate_random_buffer(p + 6, 32);
4591
4592                 b = data_blob_const(p, 38);
4593                 status = smb2_negotiate_context_add(state, &c,
4594                                         SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
4595                 if (!NT_STATUS_IS_OK(status)) {
4596                         return NULL;
4597                 }
4598
4599                 SSVAL(p, 0, 2); /* ChiperCount */
4600                 /*
4601                  * For now we preferr CCM because our implementation
4602                  * is faster than GCM, see bug #11451.
4603                  */
4604                 SSVAL(p, 2, SMB2_ENCRYPTION_AES128_CCM);
4605                 SSVAL(p, 4, SMB2_ENCRYPTION_AES128_GCM);
4606
4607                 b = data_blob_const(p, 6);
4608                 status = smb2_negotiate_context_add(state, &c,
4609                                         SMB2_ENCRYPTION_CAPABILITIES, b);
4610                 if (!NT_STATUS_IS_OK(status)) {
4611                         return NULL;
4612                 }
4613
4614                 status = smb2_negotiate_context_push(state, &b, c);
4615                 if (!NT_STATUS_IS_OK(status)) {
4616                         return NULL;
4617                 }
4618
4619                 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
4620                 pad = smbXcli_padding_helper(offset, 8);
4621
4622                 ok = data_blob_append(state, &dyn, zeros, pad);
4623                 if (!ok) {
4624                         return NULL;
4625                 }
4626                 offset += pad;
4627
4628                 ok = data_blob_append(state, &dyn, b.data, b.length);
4629                 if (!ok) {
4630                         return NULL;
4631                 }
4632
4633                 SIVAL(buf, 28, offset);   /* NegotiateContextOffset */
4634                 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
4635                 SSVAL(buf, 34, 0);        /* Reserved */
4636         } else {
4637                 SBVAL(buf, 28, 0);      /* Reserved/ClientStartTime */
4638         }
4639
4640         return smb2cli_req_send(state, state->ev,
4641                                 state->conn, SMB2_OP_NEGPROT,
4642                                 0, 0, /* flags */
4643                                 state->timeout_msec,
4644                                 NULL, NULL, /* tcon, session */
4645                                 state->smb2.fixed, sizeof(state->smb2.fixed),
4646                                 dyn.data, dyn.length,
4647                                 UINT16_MAX); /* max_dyn_len */
4648 }
4649
4650 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4651 {
4652         struct tevent_req *req =
4653                 tevent_req_callback_data(subreq,
4654                 struct tevent_req);
4655         struct smbXcli_negprot_state *state =
4656                 tevent_req_data(req,
4657                 struct smbXcli_negprot_state);
4658         struct smbXcli_conn *conn = state->conn;
4659         size_t security_offset, security_length;
4660         DATA_BLOB blob;
4661         NTSTATUS status;
4662         struct iovec *iov;
4663         uint8_t *body;
4664         size_t i;
4665         uint16_t dialect_revision;
4666         struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4667         uint32_t negotiate_context_offset = 0;
4668         uint16_t negotiate_context_count = 0;
4669         DATA_BLOB negotiate_context_blob = data_blob_null;
4670         size_t avail;
4671         size_t ctx_ofs;
4672         size_t needed;
4673         struct smb2_negotiate_context *preauth = NULL;
4674         uint16_t hash_count;
4675         uint16_t salt_length;
4676         uint16_t hash_selected;
4677         struct hc_sha512state sctx;
4678         struct smb2_negotiate_context *cipher = NULL;
4679         struct iovec sent_iov[3];
4680         static const struct smb2cli_req_expected_response expected[] = {
4681         {
4682                 .status = NT_STATUS_OK,
4683                 .body_size = 0x41
4684         }
4685         };
4686
4687         status = smb2cli_req_recv(subreq, state, &iov,
4688                                   expected, ARRAY_SIZE(expected));
4689         if (tevent_req_nterror(req, status)) {
4690                 return;
4691         }
4692
4693         body = (uint8_t *)iov[1].iov_base;
4694
4695         dialect_revision = SVAL(body, 4);
4696
4697         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4698                 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4699                         continue;
4700                 }
4701
4702                 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4703                         continue;
4704                 }
4705
4706                 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4707                         continue;
4708                 }
4709
4710                 conn->protocol = smb2cli_prots[i].proto;
4711                 break;
4712         }
4713
4714         if (conn->protocol == PROTOCOL_NONE) {
4715                 TALLOC_FREE(subreq);
4716
4717                 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4718                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4719                         return;
4720                 }
4721
4722                 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4723                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4724                         return;
4725                 }
4726
4727                 /* make sure we do not loop forever */
4728                 state->conn->min_protocol = PROTOCOL_SMB2_02;
4729
4730                 /*
4731                  * send a SMB2 negprot, in order to negotiate
4732                  * the SMB2 dialect.
4733                  */
4734                 subreq = smbXcli_negprot_smb2_subreq(state);
4735                 if (tevent_req_nomem(subreq, req)) {
4736                         return;
4737                 }
4738                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4739                 return;
4740         }
4741
4742         conn->smb2.server.security_mode = SVAL(body, 2);
4743         if (conn->protocol >= PROTOCOL_SMB3_10) {
4744                 negotiate_context_count = SVAL(body, 6);
4745         }
4746
4747         blob = data_blob_const(body + 8, 16);
4748         status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4749         if (tevent_req_nterror(req, status)) {
4750                 return;
4751         }
4752
4753         conn->smb2.server.capabilities  = IVAL(body, 24);
4754         conn->smb2.server.max_trans_size= IVAL(body, 28);
4755         conn->smb2.server.max_read_size = IVAL(body, 32);
4756         conn->smb2.server.max_write_size= IVAL(body, 36);
4757         conn->smb2.server.system_time   = BVAL(body, 40);
4758         conn->smb2.server.start_time    = BVAL(body, 48);
4759
4760         security_offset = SVAL(body, 56);
4761         security_length = SVAL(body, 58);
4762
4763         if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4764                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4765                 return;
4766         }
4767
4768         if (security_length > iov[2].iov_len) {
4769                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4770                 return;
4771         }
4772
4773         conn->smb2.server.gss_blob = data_blob_talloc(conn,
4774                                                 iov[2].iov_base,
4775                                                 security_length);
4776         if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4777                 return;
4778         }
4779
4780         if (conn->protocol < PROTOCOL_SMB3_10) {
4781                 TALLOC_FREE(subreq);
4782
4783                 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4784                         conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
4785                 }
4786                 tevent_req_done(req);
4787                 return;
4788         }
4789
4790         if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4791                 tevent_req_nterror(req,
4792                                 NT_STATUS_INVALID_NETWORK_RESPONSE);
4793                 return;
4794         }
4795
4796         negotiate_context_offset = IVAL(body, 60);
4797         if (negotiate_context_offset < security_offset) {
4798                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4799                 return;
4800         }
4801
4802         ctx_ofs = negotiate_context_offset - security_offset;
4803         if (ctx_ofs > iov[2].iov_len) {
4804                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4805                 return;
4806         }
4807         avail = iov[2].iov_len - security_length;
4808         needed = iov[2].iov_len - ctx_ofs;
4809         if (needed > avail) {
4810                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4811                 return;
4812         }
4813
4814         negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
4815         negotiate_context_blob.length = iov[2].iov_len;
4816
4817         negotiate_context_blob.data += ctx_ofs;
4818         negotiate_context_blob.length -= ctx_ofs;
4819
4820         status = smb2_negotiate_context_parse(state, negotiate_context_blob, &c);
4821         if (tevent_req_nterror(req, status)) {
4822                 return;
4823         }
4824
4825         if (negotiate_context_count != c.num_contexts) {
4826                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4827                 return;
4828         }
4829
4830         preauth = smb2_negotiate_context_find(&c,
4831                                         SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
4832         if (preauth == NULL) {
4833                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4834                 return;
4835         }
4836
4837         if (preauth->data.length < 6) {
4838                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4839                 return;
4840         }
4841
4842         hash_count = SVAL(preauth->data.data, 0);
4843         salt_length = SVAL(preauth->data.data, 2);
4844         hash_selected = SVAL(preauth->data.data, 4);
4845
4846         if (hash_count != 1) {
4847                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4848                 return;
4849         }
4850
4851         if (preauth->data.length != (6 + salt_length)) {
4852                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4853                 return;
4854         }
4855
4856         if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
4857                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4858                 return;
4859         }
4860
4861         cipher = smb2_negotiate_context_find(&c, SMB2_ENCRYPTION_CAPABILITIES);
4862         if (cipher != NULL) {
4863                 uint16_t cipher_count;
4864
4865                 if (cipher->data.length < 2) {
4866                         tevent_req_nterror(req,
4867                                         NT_STATUS_INVALID_NETWORK_RESPONSE);
4868                         return;
4869                 }
4870
4871                 cipher_count = SVAL(cipher->data.data, 0);
4872
4873                 if (cipher_count > 1) {
4874                         tevent_req_nterror(req,
4875                                         NT_STATUS_INVALID_NETWORK_RESPONSE);
4876                         return;
4877                 }
4878
4879                 if (cipher->data.length != (2 + 2 * cipher_count)) {
4880                         tevent_req_nterror(req,
4881                                         NT_STATUS_INVALID_NETWORK_RESPONSE);
4882                         return;
4883                 }
4884
4885                 if (cipher_count == 1) {
4886                         uint16_t cipher_selected;
4887
4888                         cipher_selected = SVAL(cipher->data.data, 2);
4889
4890                         switch (cipher_selected) {
4891                         case SMB2_ENCRYPTION_AES128_GCM:
4892                         case SMB2_ENCRYPTION_AES128_CCM:
4893                                 conn->smb2.server.cipher = cipher_selected;
4894                                 break;
4895                         }
4896                 }
4897         }
4898
4899         /* First we hash the request */
4900         smb2cli_req_get_sent_iov(subreq, sent_iov);
4901         samba_SHA512_Init(&sctx);
4902         samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
4903                       sizeof(conn->smb2.preauth_sha512));
4904         for (i = 0; i < 3; i++) {
4905                 samba_SHA512_Update(&sctx, sent_iov[i].iov_base, sent_iov[i].iov_len);
4906         }
4907         samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
4908         TALLOC_FREE(subreq);
4909
4910         /* And now we hash the response */
4911         samba_SHA512_Init(&sctx);
4912         samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
4913                       sizeof(conn->smb2.preauth_sha512));
4914         for (i = 0; i < 3; i++) {
4915                 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
4916         }
4917         samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
4918
4919         tevent_req_done(req);
4920 }
4921
4922 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4923                                                   TALLOC_CTX *tmp_mem,
4924                                                   uint8_t *inbuf)
4925 {
4926         size_t num_pending = talloc_array_length(conn->pending);
4927         struct tevent_req *subreq;
4928         struct smbXcli_req_state *substate;
4929         struct tevent_req *req;
4930         uint32_t protocol_magic;
4931         size_t inbuf_len = smb_len_nbt(inbuf);
4932
4933         if (num_pending != 1) {
4934                 return NT_STATUS_INTERNAL_ERROR;
4935         }
4936
4937         if (inbuf_len < 4) {
4938                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4939         }
4940
4941         subreq = conn->pending[0];
4942         substate = tevent_req_data(subreq, struct smbXcli_req_state);
4943         req = tevent_req_callback_data(subreq, struct tevent_req);
4944
4945         protocol_magic = IVAL(inbuf, 4);
4946
4947         switch (protocol_magic) {
4948         case SMB_MAGIC:
4949                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4950                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4951                 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4952
4953         case SMB2_MAGIC:
4954                 if (substate->smb2.recv_iov == NULL) {
4955                         /*
4956                          * For the SMB1 negprot we have move it.
4957                          */
4958                         substate->smb2.recv_iov = substate->smb1.recv_iov;
4959                         substate->smb1.recv_iov = NULL;
4960                 }
4961
4962                 /*
4963                  * we got an SMB2 answer, which consumed sequence number 0
4964                  * so we need to use 1 as the next one.
4965                  *
4966                  * we also need to set the current credits to 0
4967                  * as we consumed the initial one. The SMB2 answer
4968                  * hopefully grant us a new credit.
4969                  */
4970                 conn->smb2.mid = 1;
4971                 conn->smb2.cur_credits = 0;
4972                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4973                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4974                 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4975         }
4976
4977         DEBUG(10, ("Got non-SMB PDU\n"));
4978         return NT_STATUS_INVALID_NETWORK_RESPONSE;
4979 }
4980
4981 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4982 {
4983         return tevent_req_simple_recv_ntstatus(req);
4984 }
4985
4986 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4987                          uint32_t timeout_msec,
4988                          enum protocol_types min_protocol,
4989                          enum protocol_types max_protocol)
4990 {
4991         TALLOC_CTX *frame = talloc_stackframe();
4992         struct tevent_context *ev;
4993         struct tevent_req *req;
4994         NTSTATUS status = NT_STATUS_NO_MEMORY;
4995         bool ok;
4996
4997         if (smbXcli_conn_has_async_calls(conn)) {
4998                 /*
4999                  * Can't use sync call while an async call is in flight
5000                  */
5001                 status = NT_STATUS_INVALID_PARAMETER_MIX;
5002                 goto fail;
5003         }
5004         ev = samba_tevent_context_init(frame);
5005         if (ev == NULL) {
5006                 goto fail;
5007         }
5008         req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
5009                                    min_protocol, max_protocol);
5010         if (req == NULL) {
5011                 goto fail;
5012         }
5013         ok = tevent_req_poll_ntstatus(req, ev, &status);
5014         if (!ok) {
5015                 goto fail;
5016         }
5017         status = smbXcli_negprot_recv(req);
5018  fail:
5019         TALLOC_FREE(frame);
5020         return status;
5021 }
5022
5023 struct smb2cli_validate_negotiate_info_state {
5024         struct smbXcli_conn *conn;
5025         DATA_BLOB in_input_buffer;
5026         DATA_BLOB in_output_buffer;
5027         DATA_BLOB out_input_buffer;
5028         DATA_BLOB out_output_buffer;
5029         uint16_t dialect;
5030 };
5031
5032 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
5033
5034 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
5035                                                 struct tevent_context *ev,
5036                                                 struct smbXcli_conn *conn,
5037                                                 uint32_t timeout_msec,
5038                                                 struct smbXcli_session *session,
5039                                                 struct smbXcli_tcon *tcon)
5040 {
5041         struct tevent_req *req;
5042         struct smb2cli_validate_negotiate_info_state *state;
5043         uint8_t *buf;
5044         uint16_t dialect_count = 0;
5045         struct tevent_req *subreq;
5046         bool _save_should_sign;
5047         size_t i;
5048
5049         req = tevent_req_create(mem_ctx, &state,
5050                                 struct smb2cli_validate_negotiate_info_state);
5051         if (req == NULL) {
5052                 return NULL;
5053         }
5054         state->conn = conn;
5055
5056         state->in_input_buffer = data_blob_talloc_zero(state,
5057                                         4 + 16 + 1 + 1 + 2);
5058         if (tevent_req_nomem(state->in_input_buffer.data, req)) {
5059                 return tevent_req_post(req, ev);
5060         }
5061         buf = state->in_input_buffer.data;
5062
5063         if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
5064                 SIVAL(buf, 0, conn->smb2.client.capabilities);
5065         } else {
5066                 SIVAL(buf, 0, 0); /* Capabilities */
5067         }
5068         if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
5069                 NTSTATUS status;
5070                 DATA_BLOB blob;
5071
5072                 status = GUID_to_ndr_blob(&conn->smb2.client.guid,
5073                                           state, &blob);
5074                 if (!NT_STATUS_IS_OK(status)) {
5075                         return NULL;
5076                 }
5077                 memcpy(buf+4, blob.data, 16); /* ClientGuid */
5078         } else {
5079                 memset(buf+4, 0, 16);   /* ClientGuid */
5080         }
5081         if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5082                 SCVAL(buf, 20, conn->smb2.client.security_mode);
5083         } else {
5084                 SCVAL(buf, 20, 0);
5085         }
5086         SCVAL(buf, 21, 0); /* reserved */
5087
5088         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5089                 bool ok;
5090                 size_t ofs;
5091
5092                 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5093                         continue;
5094                 }
5095
5096                 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5097                         continue;
5098                 }
5099
5100                 if (smb2cli_prots[i].proto == state->conn->protocol) {
5101                         state->dialect = smb2cli_prots[i].smb2_dialect;
5102                 }
5103
5104                 ofs = state->in_input_buffer.length;
5105                 ok = data_blob_realloc(state, &state->in_input_buffer,
5106                                        ofs + 2);
5107                 if (!ok) {
5108                         tevent_req_oom(req);
5109                         return tevent_req_post(req, ev);
5110                 }
5111
5112                 buf = state->in_input_buffer.data;
5113                 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
5114
5115                 dialect_count++;
5116         }
5117         buf = state->in_input_buffer.data;
5118         SSVAL(buf, 22, dialect_count);
5119
5120         _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
5121         smb2cli_tcon_should_sign(tcon, true);
5122         subreq = smb2cli_ioctl_send(state, ev, conn,
5123                                     timeout_msec, session, tcon,
5124                                     UINT64_MAX, /* in_fid_persistent */
5125                                     UINT64_MAX, /* in_fid_volatile */
5126                                     FSCTL_VALIDATE_NEGOTIATE_INFO,
5127                                     0, /* in_max_input_length */
5128                                     &state->in_input_buffer,
5129                                     24, /* in_max_output_length */
5130                                     &state->in_output_buffer,
5131                                     SMB2_IOCTL_FLAG_IS_FSCTL);
5132         smb2cli_tcon_should_sign(tcon, _save_should_sign);
5133         if (tevent_req_nomem(subreq, req)) {
5134                 return tevent_req_post(req, ev);
5135         }
5136         tevent_req_set_callback(subreq,
5137                                 smb2cli_validate_negotiate_info_done,
5138                                 req);
5139
5140         return req;
5141 }
5142
5143 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
5144 {
5145         struct tevent_req *req =
5146                 tevent_req_callback_data(subreq,
5147                 struct tevent_req);
5148         struct smb2cli_validate_negotiate_info_state *state =
5149                 tevent_req_data(req,
5150                 struct smb2cli_validate_negotiate_info_state);
5151         NTSTATUS status;
5152         const uint8_t *buf;
5153         uint32_t capabilities;
5154         DATA_BLOB guid_blob;
5155         struct GUID server_guid;
5156         uint16_t security_mode;
5157         uint16_t dialect;
5158
5159         status = smb2cli_ioctl_recv(subreq, state,
5160                                     &state->out_input_buffer,
5161                                     &state->out_output_buffer);
5162         TALLOC_FREE(subreq);
5163         if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5164                 /*
5165                  * The response was signed, but not supported
5166                  *
5167                  * Older Windows and Samba releases return
5168                  * NT_STATUS_FILE_CLOSED.
5169                  */
5170                 tevent_req_done(req);
5171                 return;
5172         }
5173         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5174                 /*
5175                  * The response was signed, but not supported
5176                  *
5177                  * This is returned by the NTVFS based Samba 4.x file server
5178                  * for file shares.
5179                  */
5180                 tevent_req_done(req);
5181                 return;
5182         }
5183         if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5184                 /*
5185                  * The response was signed, but not supported
5186                  *
5187                  * This is returned by the NTVFS based Samba 4.x file server
5188                  * for ipc shares.
5189                  */
5190                 tevent_req_done(req);
5191                 return;
5192         }
5193         if (tevent_req_nterror(req, status)) {
5194                 return;
5195         }
5196
5197         if (state->out_output_buffer.length != 24) {
5198                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5199                 return;
5200         }
5201
5202         buf = state->out_output_buffer.data;
5203
5204         capabilities = IVAL(buf, 0);
5205         guid_blob = data_blob_const(buf + 4, 16);
5206         status = GUID_from_data_blob(&guid_blob, &server_guid);
5207         if (tevent_req_nterror(req, status)) {
5208                 return;
5209         }
5210         security_mode = CVAL(buf, 20);
5211         dialect = SVAL(buf, 22);
5212
5213         if (capabilities != state->conn->smb2.server.capabilities) {
5214                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5215                 return;
5216         }
5217
5218         if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5219                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5220                 return;
5221         }
5222
5223         if (security_mode != state->conn->smb2.server.security_mode) {
5224                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5225                 return;
5226         }
5227
5228         if (dialect != state->dialect) {
5229                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5230                 return;
5231         }
5232
5233         tevent_req_done(req);
5234 }
5235
5236 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5237 {
5238         return tevent_req_simple_recv_ntstatus(req);
5239 }
5240
5241 static int smbXcli_session_destructor(struct smbXcli_session *session)
5242 {
5243         if (session->conn == NULL) {
5244                 return 0;
5245         }
5246
5247         DLIST_REMOVE(session->conn->sessions, session);
5248         return 0;
5249 }
5250
5251 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5252                                                struct smbXcli_conn *conn)
5253 {
5254         struct smbXcli_session *session;
5255
5256         session = talloc_zero(mem_ctx, struct smbXcli_session);
5257         if (session == NULL) {
5258                 return NULL;
5259         }
5260         session->smb2 = talloc_zero(session, struct smb2cli_session);
5261         if (session->smb2 == NULL) {
5262                 talloc_free(session);
5263                 return NULL;
5264         }
5265         talloc_set_destructor(session, smbXcli_session_destructor);
5266
5267         DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
5268         session->conn = conn;
5269
5270         memcpy(session->smb2_channel.preauth_sha512,
5271                conn->smb2.preauth_sha512,
5272                sizeof(session->smb2_channel.preauth_sha512));
5273
5274         return session;
5275 }
5276
5277 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
5278                                                 struct smbXcli_session *src)
5279 {
5280         struct smbXcli_session *session;
5281
5282         session = talloc_zero(mem_ctx, struct smbXcli_session);
5283         if (session == NULL) {
5284                 return NULL;
5285         }
5286         session->smb2 = talloc_zero(session, struct smb2cli_session);
5287         if (session->smb2 == NULL) {
5288                 talloc_free(session);
5289                 return NULL;
5290         }
5291
5292         session->conn = src->conn;
5293         *session->smb2 = *src->smb2;
5294         session->smb2_channel = src->smb2_channel;
5295         session->disconnect_expired = src->disconnect_expired;
5296
5297         DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
5298         talloc_set_destructor(session, smbXcli_session_destructor);
5299
5300         return session;
5301 }
5302
5303 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
5304 {
5305         const DATA_BLOB *application_key;
5306
5307         if (session->conn == NULL) {
5308                 return false;
5309         }
5310
5311         /*
5312          * If we have an application key we had a session key negotiated
5313          * at auth time.
5314          */
5315         if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5316                 application_key = &session->smb2->application_key;
5317         } else {
5318                 application_key = &session->smb1.application_key;
5319         }
5320
5321         if (application_key->length == 0) {
5322                 return false;
5323         }
5324
5325         return true;
5326 }
5327
5328 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
5329                                          TALLOC_CTX *mem_ctx,
5330                                          DATA_BLOB *key)
5331 {
5332         const DATA_BLOB *application_key;
5333
5334         *key = data_blob_null;
5335
5336         if (session->conn == NULL) {
5337                 return NT_STATUS_NO_USER_SESSION_KEY;
5338         }
5339
5340         if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5341                 application_key = &session->smb2->application_key;
5342         } else {
5343                 application_key = &session->smb1.application_key;
5344         }
5345
5346         if (application_key->length == 0) {
5347                 return NT_STATUS_NO_USER_SESSION_KEY;
5348         }
5349
5350         *key = data_blob_dup_talloc(mem_ctx, *application_key);
5351         if (key->data == NULL) {
5352                 return NT_STATUS_NO_MEMORY;
5353         }
5354
5355         return NT_STATUS_OK;
5356 }
5357
5358 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
5359 {
5360         session->disconnect_expired = true;
5361 }
5362
5363 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
5364 {
5365         return session->smb1.session_id;
5366 }
5367
5368 void smb1cli_session_set_id(struct smbXcli_session *session,
5369                             uint16_t session_id)
5370 {
5371         session->smb1.session_id = session_id;
5372 }
5373
5374 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
5375                                          const DATA_BLOB _session_key)
5376 {
5377         struct smbXcli_conn *conn = session->conn;
5378         uint8_t session_key[16];
5379
5380         if (conn == NULL) {
5381                 return NT_STATUS_INVALID_PARAMETER_MIX;
5382         }
5383
5384         if (session->smb1.application_key.length != 0) {
5385                 /*
5386                  * TODO: do not allow this...
5387                  *
5388                  * return NT_STATUS_INVALID_PARAMETER_MIX;
5389                  */
5390                 data_blob_clear_free(&session->smb1.application_key);
5391                 session->smb1.protected_key = false;
5392         }
5393
5394         if (_session_key.length == 0) {
5395                 return NT_STATUS_OK;
5396         }
5397
5398         ZERO_STRUCT(session_key);
5399         memcpy(session_key, _session_key.data,
5400                MIN(_session_key.length, sizeof(session_key)));
5401
5402         session->smb1.application_key = data_blob_talloc(session,
5403                                                          session_key,
5404                                                          sizeof(session_key));
5405         ZERO_STRUCT(session_key);
5406         if (session->smb1.application_key.data == NULL) {
5407                 return NT_STATUS_NO_MEMORY;
5408         }
5409
5410         session->smb1.protected_key = false;
5411
5412         return NT_STATUS_OK;
5413 }
5414
5415 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
5416 {
5417         if (session->smb1.protected_key) {
5418                 /* already protected */
5419                 return NT_STATUS_OK;
5420         }
5421
5422         if (session->smb1.application_key.length != 16) {
5423                 return NT_STATUS_INVALID_PARAMETER_MIX;
5424         }
5425
5426         smb_key_derivation(session->smb1.application_key.data,
5427                            session->smb1.application_key.length,
5428                            session->smb1.application_key.data);
5429
5430         session->smb1.protected_key = true;
5431
5432         return NT_STATUS_OK;
5433 }
5434
5435 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
5436 {
5437         struct smbXcli_conn *conn = session->conn;
5438         uint8_t security_mode = 0;
5439
5440         if (conn == NULL) {
5441                 return security_mode;
5442         }
5443
5444         security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
5445         if (conn->mandatory_signing) {
5446                 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5447         }
5448         if (session->smb2->should_sign) {
5449                 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5450         }
5451
5452         return security_mode;
5453 }
5454
5455 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
5456 {
5457         return session->smb2->session_id;
5458 }
5459
5460 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
5461 {
5462         return session->smb2->session_flags;
5463 }
5464
5465 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
5466                                       uint64_t session_id,
5467                                       uint16_t session_flags)
5468 {
5469         session->smb2->session_id = session_id;
5470         session->smb2->session_flags = session_flags;
5471 }
5472
5473 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
5474 {
5475         session->smb2->channel_sequence += 1;
5476 }
5477
5478 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
5479                                                 uint16_t channel_sequence)
5480 {
5481         uint16_t prev_cs;
5482
5483         prev_cs = session->smb2->channel_sequence;
5484         session->smb2->channel_sequence = channel_sequence;
5485
5486         return prev_cs;
5487 }
5488
5489 void smb2cli_session_start_replay(struct smbXcli_session *session)
5490 {
5491         session->smb2->replay_active = true;
5492 }
5493
5494 void smb2cli_session_stop_replay(struct smbXcli_session *session)
5495 {
5496         session->smb2->replay_active = false;
5497 }
5498
5499 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
5500                                         const struct iovec *iov)
5501 {
5502         struct hc_sha512state sctx;
5503         size_t i;
5504
5505         if (session->conn == NULL) {
5506                 return NT_STATUS_INTERNAL_ERROR;
5507         }
5508
5509         if (session->conn->protocol < PROTOCOL_SMB3_10) {
5510                 return NT_STATUS_OK;
5511         }
5512
5513         if (session->smb2_channel.signing_key.length != 0) {
5514                 return NT_STATUS_OK;
5515         }
5516
5517         samba_SHA512_Init(&sctx);
5518         samba_SHA512_Update(&sctx, session->smb2_channel.preauth_sha512,
5519                       sizeof(session->smb2_channel.preauth_sha512));
5520         for (i = 0; i < 3; i++) {
5521                 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5522         }
5523         samba_SHA512_Final(session->smb2_channel.preauth_sha512, &sctx);
5524
5525         return NT_STATUS_OK;
5526 }
5527
5528 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
5529                                          const DATA_BLOB _session_key,
5530                                          const struct iovec *recv_iov)
5531 {
5532         struct smbXcli_conn *conn = session->conn;
5533         uint16_t no_sign_flags;
5534         uint8_t session_key[16];
5535         bool check_signature = true;
5536         uint32_t hdr_flags;
5537         NTSTATUS status;
5538         struct _derivation {
5539                 DATA_BLOB label;
5540                 DATA_BLOB context;
5541         };
5542         struct {
5543                 struct _derivation signing;
5544                 struct _derivation encryption;
5545                 struct _derivation decryption;
5546                 struct _derivation application;
5547         } derivation = { };
5548         size_t nonce_size = 0;
5549
5550         if (conn == NULL) {
5551                 return NT_STATUS_INVALID_PARAMETER_MIX;
5552         }
5553
5554         if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
5555                 return NT_STATUS_INVALID_PARAMETER_MIX;
5556         }
5557
5558         no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
5559
5560         if (session->smb2->session_flags & no_sign_flags) {
5561                 session->smb2->should_sign = false;
5562                 return NT_STATUS_OK;
5563         }
5564
5565         if (session->smb2->signing_key.length != 0) {
5566                 return NT_STATUS_INVALID_PARAMETER_MIX;
5567         }
5568
5569         if (conn->protocol >= PROTOCOL_SMB3_10) {
5570                 struct _derivation *d;
5571                 DATA_BLOB p;
5572
5573                 p = data_blob_const(session->smb2_channel.preauth_sha512,
5574                                 sizeof(session->smb2_channel.preauth_sha512));
5575
5576                 d = &derivation.signing;
5577                 d->label = data_blob_string_const_null("SMBSigningKey");
5578                 d->context = p;
5579
5580                 d = &derivation.encryption;
5581                 d->label = data_blob_string_const_null("SMBC2SCipherKey");
5582                 d->context = p;
5583
5584                 d = &derivation.decryption;
5585                 d->label = data_blob_string_const_null("SMBS2CCipherKey");
5586                 d->context = p;
5587
5588                 d = &derivation.application;
5589                 d->label = data_blob_string_const_null("SMBAppKey");
5590                 d->context = p;
5591
5592         } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5593                 struct _derivation *d;
5594
5595                 d = &derivation.signing;
5596                 d->label = data_blob_string_const_null("SMB2AESCMAC");
5597                 d->context = data_blob_string_const_null("SmbSign");
5598
5599                 d = &derivation.encryption;
5600                 d->label = data_blob_string_const_null("SMB2AESCCM");
5601                 d->context = data_blob_string_const_null("ServerIn ");
5602
5603                 d = &derivation.decryption;
5604                 d->label = data_blob_string_const_null("SMB2AESCCM");
5605                 d->context = data_blob_string_const_null("ServerOut");
5606
5607                 d = &derivation.application;
5608                 d->label = data_blob_string_const_null("SMB2APP");
5609                 d->context = data_blob_string_const_null("SmbRpc");
5610         }
5611
5612         ZERO_STRUCT(session_key);
5613         memcpy(session_key, _session_key.data,
5614                MIN(_session_key.length, sizeof(session_key)));
5615
5616         session->smb2->signing_key = data_blob_talloc(session,
5617                                                      session_key,
5618                                                      sizeof(session_key));
5619         if (session->smb2->signing_key.data == NULL) {
5620                 ZERO_STRUCT(session_key);
5621                 return NT_STATUS_NO_MEMORY;
5622         }
5623
5624         if (conn->protocol >= PROTOCOL_SMB2_24) {
5625                 struct _derivation *d = &derivation.signing;
5626
5627                 smb2_key_derivation(session_key, sizeof(session_key),
5628                                     d->label.data, d->label.length,
5629                                     d->context.data, d->context.length,
5630                                     session->smb2->signing_key.data);
5631         }
5632
5633         session->smb2->encryption_key = data_blob_dup_talloc(session,
5634                                                 session->smb2->signing_key);
5635         if (session->smb2->encryption_key.data == NULL) {
5636                 ZERO_STRUCT(session_key);
5637                 return NT_STATUS_NO_MEMORY;
5638         }
5639
5640         if (conn->protocol >= PROTOCOL_SMB2_24) {
5641                 struct _derivation *d = &derivation.encryption;
5642
5643                 smb2_key_derivation(session_key, sizeof(session_key),
5644                                     d->label.data, d->label.length,
5645                                     d->context.data, d->context.length,
5646                                     session->smb2->encryption_key.data);
5647         }
5648
5649         session->smb2->decryption_key = data_blob_dup_talloc(session,
5650                                                 session->smb2->signing_key);
5651         if (session->smb2->decryption_key.data == NULL) {
5652                 ZERO_STRUCT(session_key);
5653                 return NT_STATUS_NO_MEMORY;
5654         }
5655
5656         if (conn->protocol >= PROTOCOL_SMB2_24) {
5657                 struct _derivation *d = &derivation.decryption;
5658
5659                 smb2_key_derivation(session_key, sizeof(session_key),
5660                                     d->label.data, d->label.length,
5661                                     d->context.data, d->context.length,
5662                                     session->smb2->decryption_key.data);
5663         }
5664
5665         session->smb2->application_key = data_blob_dup_talloc(session,
5666                                                 session->smb2->signing_key);
5667         if (session->smb2->application_key.data == NULL) {
5668                 ZERO_STRUCT(session_key);
5669                 return NT_STATUS_NO_MEMORY;
5670         }
5671
5672         if (conn->protocol >= PROTOCOL_SMB2_24) {
5673                 struct _derivation *d = &derivation.application;
5674
5675                 smb2_key_derivation(session_key, sizeof(session_key),
5676                                     d->label.data, d->label.length,
5677                                     d->context.data, d->context.length,
5678                                     session->smb2->application_key.data);
5679         }
5680         ZERO_STRUCT(session_key);
5681
5682         session->smb2_channel.signing_key = data_blob_dup_talloc(session,
5683                                                 session->smb2->signing_key);
5684         if (session->smb2_channel.signing_key.data == NULL) {
5685                 return NT_STATUS_NO_MEMORY;
5686         }
5687
5688         check_signature = conn->mandatory_signing;
5689
5690         hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
5691         if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
5692                 /*
5693                  * Sadly some vendors don't sign the
5694                  * final SMB2 session setup response
5695                  *
5696                  * At least Windows and Samba are always doing this
5697                  * if there's a session key available.
5698                  *
5699                  * We only check the signature if it's mandatory
5700                  * or SMB2_HDR_FLAG_SIGNED is provided.
5701                  */
5702                 check_signature = true;
5703         }
5704
5705         if (conn->protocol >= PROTOCOL_SMB3_10) {
5706                 check_signature = true;
5707         }
5708
5709         if (check_signature) {
5710                 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5711                                                 session->conn->protocol,
5712                                                 recv_iov, 3);
5713                 if (!NT_STATUS_IS_OK(status)) {
5714                         return status;
5715                 }
5716         }
5717
5718         session->smb2->should_sign = false;
5719         session->smb2->should_encrypt = false;
5720
5721         if (conn->desire_signing) {
5722                 session->smb2->should_sign = true;
5723         }
5724
5725         if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
5726                 session->smb2->should_sign = true;
5727         }
5728
5729         if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
5730                 session->smb2->should_encrypt = true;
5731         }
5732
5733         if (conn->protocol < PROTOCOL_SMB2_24) {
5734                 session->smb2->should_encrypt = false;
5735         }
5736
5737         if (conn->smb2.server.cipher == 0) {
5738                 session->smb2->should_encrypt = false;
5739         }
5740
5741         /*
5742          * CCM and GCM algorithms must never have their
5743          * nonce wrap, or the security of the whole
5744          * communication and the keys is destroyed.
5745          * We must drop the connection once we have
5746          * transfered too much data.
5747          *
5748          * NOTE: We assume nonces greater than 8 bytes.
5749          */
5750         generate_random_buffer((uint8_t *)&session->smb2->nonce_high_random,
5751                                sizeof(session->smb2->nonce_high_random));
5752         switch (conn->smb2.server.cipher) {
5753         case SMB2_ENCRYPTION_AES128_CCM:
5754                 nonce_size = AES_CCM_128_NONCE_SIZE;
5755                 break;
5756         case SMB2_ENCRYPTION_AES128_GCM:
5757                 nonce_size = AES_GCM_128_IV_SIZE;
5758                 break;
5759         default:
5760                 nonce_size = 0;
5761                 break;
5762         }
5763         session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
5764         session->smb2->nonce_high = 0;
5765         session->smb2->nonce_low = 0;
5766
5767         return NT_STATUS_OK;
5768 }
5769
5770 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
5771                                         struct smbXcli_session *session1,
5772                                         struct smbXcli_conn *conn,
5773                                         struct smbXcli_session **_session2)
5774 {
5775         struct smbXcli_session *session2;
5776
5777         if (session1->smb2->signing_key.length == 0) {
5778                 return NT_STATUS_INVALID_PARAMETER_MIX;
5779         }
5780
5781         if (conn == NULL) {
5782                 return NT_STATUS_INVALID_PARAMETER_MIX;
5783         }
5784
5785         session2 = talloc_zero(mem_ctx, struct smbXcli_session);
5786         if (session2 == NULL) {
5787                 return NT_STATUS_NO_MEMORY;
5788         }
5789         session2->smb2 = talloc_reference(session2, session1->smb2);
5790         if (session2->smb2 == NULL) {
5791                 talloc_free(session2);
5792                 return NT_STATUS_NO_MEMORY;
5793         }
5794
5795         talloc_set_destructor(session2, smbXcli_session_destructor);
5796         DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
5797         session2->conn = conn;
5798
5799         memcpy(session2->smb2_channel.preauth_sha512,
5800                conn->smb2.preauth_sha512,
5801                sizeof(session2->smb2_channel.preauth_sha512));
5802
5803         *_session2 = session2;
5804         return NT_STATUS_OK;
5805 }
5806
5807 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
5808                                          const DATA_BLOB _channel_key,
5809                                          const struct iovec *recv_iov)
5810 {
5811         struct smbXcli_conn *conn = session->conn;
5812         uint8_t channel_key[16];
5813         NTSTATUS status;
5814         struct _derivation {
5815                 DATA_BLOB label;
5816                 DATA_BLOB context;
5817         };
5818         struct {
5819                 struct _derivation signing;
5820         } derivation = { };
5821
5822         if (conn == NULL) {
5823                 return NT_STATUS_INVALID_PARAMETER_MIX;
5824         }
5825
5826         if (session->smb2_channel.signing_key.length != 0) {
5827                 return NT_STATUS_INVALID_PARAMETER_MIX;
5828         }
5829
5830         if (conn->protocol >= PROTOCOL_SMB3_10) {
5831                 struct _derivation *d;
5832                 DATA_BLOB p;
5833
5834                 p = data_blob_const(session->smb2_channel.preauth_sha512,
5835                                 sizeof(session->smb2_channel.preauth_sha512));
5836
5837                 d = &derivation.signing;
5838                 d->label = data_blob_string_const_null("SMBSigningKey");
5839                 d->context = p;
5840         } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5841                 struct _derivation *d;
5842
5843                 d = &derivation.signing;
5844                 d->label = data_blob_string_const_null("SMB2AESCMAC");
5845                 d->context = data_blob_string_const_null("SmbSign");
5846         }
5847
5848         ZERO_STRUCT(channel_key);
5849         memcpy(channel_key, _channel_key.data,
5850                MIN(_channel_key.length, sizeof(channel_key)));
5851
5852         session->smb2_channel.signing_key = data_blob_talloc(session,
5853                                                 channel_key,
5854                                                 sizeof(channel_key));
5855         if (session->smb2_channel.signing_key.data == NULL) {
5856                 ZERO_STRUCT(channel_key);
5857                 return NT_STATUS_NO_MEMORY;
5858         }
5859
5860         if (conn->protocol >= PROTOCOL_SMB2_24) {
5861                 struct _derivation *d = &derivation.signing;
5862
5863                 smb2_key_derivation(channel_key, sizeof(channel_key),
5864                                     d->label.data, d->label.length,
5865                                     d->context.data, d->context.length,
5866                                     session->smb2_channel.signing_key.data);
5867         }
5868         ZERO_STRUCT(channel_key);
5869
5870         status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5871                                         session->conn->protocol,
5872                                         recv_iov, 3);
5873         if (!NT_STATUS_IS_OK(status)) {
5874                 return status;
5875         }
5876
5877         return NT_STATUS_OK;
5878 }
5879
5880 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
5881 {
5882         if (!session->smb2->should_sign) {
5883                 /*
5884                  * We need required signing on the session
5885                  * in order to prevent man in the middle attacks.
5886                  */
5887                 return NT_STATUS_INVALID_PARAMETER_MIX;
5888         }
5889
5890         if (session->smb2->should_encrypt) {
5891                 return NT_STATUS_OK;
5892         }
5893
5894         if (session->conn->protocol < PROTOCOL_SMB2_24) {
5895                 return NT_STATUS_NOT_SUPPORTED;
5896         }
5897
5898         if (session->conn->smb2.server.cipher == 0) {
5899                 return NT_STATUS_NOT_SUPPORTED;
5900         }
5901
5902         if (session->smb2->signing_key.data == NULL) {
5903                 return NT_STATUS_NOT_SUPPORTED;
5904         }
5905         session->smb2->should_encrypt = true;
5906         return NT_STATUS_OK;
5907 }
5908
5909 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5910 {
5911         struct smbXcli_tcon *tcon;
5912
5913         tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5914         if (tcon == NULL) {
5915                 return NULL;
5916         }
5917
5918         return tcon;
5919 }
5920
5921 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
5922                                     uint32_t fs_attributes)
5923 {
5924         tcon->fs_attributes = fs_attributes;
5925 }
5926
5927 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
5928 {
5929         return tcon->fs_attributes;
5930 }
5931
5932 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
5933 {
5934         if (tcon == NULL) {
5935                 return false;
5936         }
5937
5938         if (tcon->is_smb1) {
5939                 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
5940                         return true;
5941                 }
5942
5943                 return false;
5944         }
5945
5946         if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
5947                 return true;
5948         }
5949
5950         return false;
5951 }
5952
5953 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5954 {
5955         return tcon->smb1.tcon_id;
5956 }
5957
5958 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5959 {
5960         tcon->is_smb1 = true;
5961         tcon->smb1.tcon_id = tcon_id;
5962 }
5963
5964 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5965                              uint16_t tcon_id,
5966                              uint16_t optional_support,
5967                              uint32_t maximal_access,
5968                              uint32_t guest_maximal_access,
5969                              const char *service,
5970                              const char *fs_type)
5971 {
5972         tcon->is_smb1 = true;
5973         tcon->fs_attributes = 0;
5974         tcon->smb1.tcon_id = tcon_id;
5975         tcon->smb1.optional_support = optional_support;
5976         tcon->smb1.maximal_access = maximal_access;
5977         tcon->smb1.guest_maximal_access = guest_maximal_access;
5978
5979         TALLOC_FREE(tcon->smb1.service);
5980         tcon->smb1.service = talloc_strdup(tcon, service);
5981         if (service != NULL && tcon->smb1.service == NULL) {
5982                 return false;
5983         }
5984
5985         TALLOC_FREE(tcon->smb1.fs_type);
5986         tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5987         if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5988                 return false;
5989         }
5990
5991         return true;
5992 }
5993
5994 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5995 {
5996         return tcon->smb2.tcon_id;
5997 }
5998
5999 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
6000 {
6001         return tcon->smb2.capabilities;
6002 }
6003
6004 uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
6005 {
6006         return tcon->smb2.flags;
6007 }
6008
6009 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
6010                              struct smbXcli_session *session,
6011                              uint32_t tcon_id,
6012                              uint8_t type,
6013                              uint32_t flags,
6014                              uint32_t capabilities,
6015                              uint32_t maximal_access)
6016 {
6017         tcon->is_smb1 = false;
6018         tcon->fs_attributes = 0;
6019         tcon->smb2.tcon_id = tcon_id;
6020         tcon->smb2.type = type;
6021         tcon->smb2.flags = flags;
6022         tcon->smb2.capabilities = capabilities;
6023         tcon->smb2.maximal_access = maximal_access;
6024
6025         tcon->smb2.should_sign = false;
6026         tcon->smb2.should_encrypt = false;
6027
6028         if (session == NULL) {
6029                 return;
6030         }
6031
6032         tcon->smb2.should_sign = session->smb2->should_sign;
6033         tcon->smb2.should_encrypt = session->smb2->should_encrypt;
6034
6035         if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
6036                 tcon->smb2.should_encrypt = true;
6037         }
6038 }
6039
6040 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
6041                               bool should_sign)
6042 {
6043         tcon->smb2.should_sign = should_sign;
6044 }
6045
6046 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
6047 {
6048         if (tcon->smb2.should_encrypt) {
6049                 return true;
6050         }
6051
6052         return tcon->smb2.should_sign;
6053 }
6054
6055 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
6056                                  bool should_encrypt)
6057 {
6058         tcon->smb2.should_encrypt = should_encrypt;
6059 }
6060
6061 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
6062 {
6063         return tcon->smb2.should_encrypt;
6064 }