source3/rpc_client/cli_pipe.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client routines
   4  *  Largely rewritten by Jeremy Allison             2005.
   5  *  Heavily modified by Simo Sorce                  2010.
   6  *  Copyright Andrew Bartlett                       2011.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 3 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "includes.h"
  23 #include "../lib/util/tevent_ntstatus.h"
  24 #include "librpc/gen_ndr/ndr_epmapper_c.h"
  25 #include "../librpc/gen_ndr/ndr_schannel.h"
  26 #include "../librpc/gen_ndr/ndr_dssetup.h"
  27 #include "../libcli/auth/schannel.h"
  28 #include "../libcli/auth/spnego.h"
  29 #include "../auth/ntlmssp/ntlmssp.h"
  30 #include "auth_generic.h"
  31 #include "librpc/gen_ndr/ndr_dcerpc.h"
  32 #include "librpc/rpc/dcerpc.h"
  33 #include "librpc/crypto/gse.h"
  34 #include "librpc/crypto/spnego.h"
  35 #include "rpc_dce.h"
  36 #include "cli_pipe.h"
  37 #include "libsmb/libsmb.h"
  38 #include "auth/gensec/gensec.h"
  39
  40 #undef DBGC_CLASS
  41 #define DBGC_CLASS DBGC_RPC_CLI
  42
  43 /********************************************************************
  44  Pipe description for a DEBUG
  45  ********************************************************************/
  46 static const char *rpccli_pipe_txt(TALLOC_CTX *mem_ctx,
  47                                    struct rpc_pipe_client *cli)
  48 {
  49         char *result = talloc_asprintf(mem_ctx, "host %s", cli->desthost);
  50         if (result == NULL) {
  51                 return "pipe";
  52         }
  53         return result;
  54 }
  55
  56 /********************************************************************
  57  Rpc pipe call id.
  58  ********************************************************************/
  59
  60 static uint32 get_rpc_call_id(void)
  61 {
  62         static uint32 call_id = 0;
  63         return ++call_id;
  64 }
  65
  66 /*******************************************************************
  67  Use SMBreadX to get rest of one fragment's worth of rpc data.
  68  Reads the whole size or give an error message
  69  ********************************************************************/
  70
  71 struct rpc_read_state {
  72         struct event_context *ev;
  73         struct rpc_cli_transport *transport;
  74         uint8_t *data;
  75         size_t size;
  76         size_t num_read;
  77 };
  78
  79 static void rpc_read_done(struct tevent_req *subreq);
  80
  81 static struct tevent_req *rpc_read_send(TALLOC_CTX *mem_ctx,
  82                                         struct event_context *ev,
  83                                         struct rpc_cli_transport *transport,
  84                                         uint8_t *data, size_t size)
  85 {
  86         struct tevent_req *req, *subreq;
  87         struct rpc_read_state *state;
  88
  89         req = tevent_req_create(mem_ctx, &state, struct rpc_read_state);
  90         if (req == NULL) {
  91                 return NULL;
  92         }
  93         state->ev = ev;
  94         state->transport = transport;
  95         state->data = data;
  96         state->size = size;
  97         state->num_read = 0;
  98
  99         DEBUG(5, ("rpc_read_send: data_to_read: %u\n", (unsigned int)size));
 100
 101         subreq = transport->read_send(state, ev, (uint8_t *)data, size,
 102                                       transport->priv);
 103         if (subreq == NULL) {
 104                 goto fail;
 105         }
 106         tevent_req_set_callback(subreq, rpc_read_done, req);
 107         return req;
 108
 109  fail:
 110         TALLOC_FREE(req);
 111         return NULL;
 112 }
 113
 114 static void rpc_read_done(struct tevent_req *subreq)
 115 {
 116         struct tevent_req *req = tevent_req_callback_data(
 117                 subreq, struct tevent_req);
 118         struct rpc_read_state *state = tevent_req_data(
 119                 req, struct rpc_read_state);
 120         NTSTATUS status;
 121         ssize_t received;
 122
 123         status = state->transport->read_recv(subreq, &received);
 124         TALLOC_FREE(subreq);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 tevent_req_nterror(req, status);
 127                 return;
 128         }
 129
 130         state->num_read += received;
 131         if (state->num_read == state->size) {
 132                 tevent_req_done(req);
 133                 return;
 134         }
 135
 136         subreq = state->transport->read_send(state, state->ev,
 137                                              state->data + state->num_read,
 138                                              state->size - state->num_read,
 139                                              state->transport->priv);
 140         if (tevent_req_nomem(subreq, req)) {
 141                 return;
 142         }
 143         tevent_req_set_callback(subreq, rpc_read_done, req);
 144 }
 145
 146 static NTSTATUS rpc_read_recv(struct tevent_req *req)
 147 {
 148         return tevent_req_simple_recv_ntstatus(req);
 149 }
 150
 151 struct rpc_write_state {
 152         struct event_context *ev;
 153         struct rpc_cli_transport *transport;
 154         const uint8_t *data;
 155         size_t size;
 156         size_t num_written;
 157 };
 158
 159 static void rpc_write_done(struct tevent_req *subreq);
 160
 161 static struct tevent_req *rpc_write_send(TALLOC_CTX *mem_ctx,
 162                                          struct event_context *ev,
 163                                          struct rpc_cli_transport *transport,
 164                                          const uint8_t *data, size_t size)
 165 {
 166         struct tevent_req *req, *subreq;
 167         struct rpc_write_state *state;
 168
 169         req = tevent_req_create(mem_ctx, &state, struct rpc_write_state);
 170         if (req == NULL) {
 171                 return NULL;
 172         }
 173         state->ev = ev;
 174         state->transport = transport;
 175         state->data = data;
 176         state->size = size;
 177         state->num_written = 0;
 178
 179         DEBUG(5, ("rpc_write_send: data_to_write: %u\n", (unsigned int)size));
 180
 181         subreq = transport->write_send(state, ev, data, size, transport->priv);
 182         if (subreq == NULL) {
 183                 goto fail;
 184         }
 185         tevent_req_set_callback(subreq, rpc_write_done, req);
 186         return req;
 187  fail:
 188         TALLOC_FREE(req);
 189         return NULL;
 190 }
 191
 192 static void rpc_write_done(struct tevent_req *subreq)
 193 {
 194         struct tevent_req *req = tevent_req_callback_data(
 195                 subreq, struct tevent_req);
 196         struct rpc_write_state *state = tevent_req_data(
 197                 req, struct rpc_write_state);
 198         NTSTATUS status;
 199         ssize_t written;
 200
 201         status = state->transport->write_recv(subreq, &written);
 202         TALLOC_FREE(subreq);
 203         if (!NT_STATUS_IS_OK(status)) {
 204                 tevent_req_nterror(req, status);
 205                 return;
 206         }
 207
 208         state->num_written += written;
 209
 210         if (state->num_written == state->size) {
 211                 tevent_req_done(req);
 212                 return;
 213         }
 214
 215         subreq = state->transport->write_send(state, state->ev,
 216                                               state->data + state->num_written,
 217                                               state->size - state->num_written,
 218                                               state->transport->priv);
 219         if (tevent_req_nomem(subreq, req)) {
 220                 return;
 221         }
 222         tevent_req_set_callback(subreq, rpc_write_done, req);
 223 }
 224
 225 static NTSTATUS rpc_write_recv(struct tevent_req *req)
 226 {
 227         return tevent_req_simple_recv_ntstatus(req);
 228 }
 229
 230
 231 /****************************************************************************
 232  Try and get a PDU's worth of data from current_pdu. If not, then read more
 233  from the wire.
 234  ****************************************************************************/
 235
 236 struct get_complete_frag_state {
 237         struct event_context *ev;
 238         struct rpc_pipe_client *cli;
 239         uint16_t frag_len;
 240         DATA_BLOB *pdu;
 241 };
 242
 243 static void get_complete_frag_got_header(struct tevent_req *subreq);
 244 static void get_complete_frag_got_rest(struct tevent_req *subreq);
 245
 246 static struct tevent_req *get_complete_frag_send(TALLOC_CTX *mem_ctx,
 247                                                  struct event_context *ev,
 248                                                  struct rpc_pipe_client *cli,
 249                                                  DATA_BLOB *pdu)
 250 {
 251         struct tevent_req *req, *subreq;
 252         struct get_complete_frag_state *state;
 253         size_t received;
 254         NTSTATUS status;
 255
 256         req = tevent_req_create(mem_ctx, &state,
 257                                 struct get_complete_frag_state);
 258         if (req == NULL) {
 259                 return NULL;
 260         }
 261         state->ev = ev;
 262         state->cli = cli;
 263         state->frag_len = RPC_HEADER_LEN;
 264         state->pdu = pdu;
 265
 266         received = pdu->length;
 267         if (received < RPC_HEADER_LEN) {
 268                 if (!data_blob_realloc(mem_ctx, pdu, RPC_HEADER_LEN)) {
 269                         status = NT_STATUS_NO_MEMORY;
 270                         goto post_status;
 271                 }
 272                 subreq = rpc_read_send(state, state->ev,
 273                                         state->cli->transport,
 274                                         pdu->data + received,
 275                                         RPC_HEADER_LEN - received);
 276                 if (subreq == NULL) {
 277                         status = NT_STATUS_NO_MEMORY;
 278                         goto post_status;
 279                 }
 280                 tevent_req_set_callback(subreq, get_complete_frag_got_header,
 281                                         req);
 282                 return req;
 283         }
 284
 285         state->frag_len = dcerpc_get_frag_length(pdu);
 286
 287         /*
 288          * Ensure we have frag_len bytes of data.
 289          */
 290         if (received < state->frag_len) {
 291                 if (!data_blob_realloc(NULL, pdu, state->frag_len)) {
 292                         status = NT_STATUS_NO_MEMORY;
 293                         goto post_status;
 294                 }
 295                 subreq = rpc_read_send(state, state->ev,
 296                                         state->cli->transport,
 297                                         pdu->data + received,
 298                                         state->frag_len - received);
 299                 if (subreq == NULL) {
 300                         status = NT_STATUS_NO_MEMORY;
 301                         goto post_status;
 302                 }
 303                 tevent_req_set_callback(subreq, get_complete_frag_got_rest,
 304                                         req);
 305                 return req;
 306         }
 307
 308         status = NT_STATUS_OK;
 309  post_status:
 310         if (NT_STATUS_IS_OK(status)) {
 311                 tevent_req_done(req);
 312         } else {
 313                 tevent_req_nterror(req, status);
 314         }
 315         return tevent_req_post(req, ev);
 316 }
 317
 318 static void get_complete_frag_got_header(struct tevent_req *subreq)
 319 {
 320         struct tevent_req *req = tevent_req_callback_data(
 321                 subreq, struct tevent_req);
 322         struct get_complete_frag_state *state = tevent_req_data(
 323                 req, struct get_complete_frag_state);
 324         NTSTATUS status;
 325
 326         status = rpc_read_recv(subreq);
 327         TALLOC_FREE(subreq);
 328         if (!NT_STATUS_IS_OK(status)) {
 329                 tevent_req_nterror(req, status);
 330                 return;
 331         }
 332
 333         state->frag_len = dcerpc_get_frag_length(state->pdu);
 334
 335         if (!data_blob_realloc(NULL, state->pdu, state->frag_len)) {
 336                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 337                 return;
 338         }
 339
 340         /*
 341          * We're here in this piece of code because we've read exactly
 342          * RPC_HEADER_LEN bytes into state->pdu.
 343          */
 344
 345         subreq = rpc_read_send(state, state->ev, state->cli->transport,
 346                                 state->pdu->data + RPC_HEADER_LEN,
 347                                 state->frag_len - RPC_HEADER_LEN);
 348         if (tevent_req_nomem(subreq, req)) {
 349                 return;
 350         }
 351         tevent_req_set_callback(subreq, get_complete_frag_got_rest, req);
 352 }
 353
 354 static void get_complete_frag_got_rest(struct tevent_req *subreq)
 355 {
 356         struct tevent_req *req = tevent_req_callback_data(
 357                 subreq, struct tevent_req);
 358         NTSTATUS status;
 359
 360         status = rpc_read_recv(subreq);
 361         TALLOC_FREE(subreq);
 362         if (!NT_STATUS_IS_OK(status)) {
 363                 tevent_req_nterror(req, status);
 364                 return;
 365         }
 366         tevent_req_done(req);
 367 }
 368
 369 static NTSTATUS get_complete_frag_recv(struct tevent_req *req)
 370 {
 371         return tevent_req_simple_recv_ntstatus(req);
 372 }
 373
 374 /****************************************************************************
 375  Do basic authentication checks on an incoming pdu.
 376  ****************************************************************************/
 377
 378 static NTSTATUS cli_pipe_validate_current_pdu(TALLOC_CTX *mem_ctx,
 379                                                 struct rpc_pipe_client *cli,
 380                                                 struct ncacn_packet *pkt,
 381                                                 DATA_BLOB *pdu,
 382                                                 uint8_t expected_pkt_type,
 383                                                 DATA_BLOB *rdata,
 384                                                 DATA_BLOB *reply_pdu)
 385 {
 386         struct dcerpc_response *r;
 387         NTSTATUS ret = NT_STATUS_OK;
 388         size_t pad_len = 0;
 389
 390         /*
 391          * Point the return values at the real data including the RPC
 392          * header. Just in case the caller wants it.
 393          */
 394         *rdata = *pdu;
 395
 396         /* Ensure we have the correct type. */
 397         switch (pkt->ptype) {
 398         case DCERPC_PKT_ALTER_RESP:
 399         case DCERPC_PKT_BIND_ACK:
 400
 401                 /* Client code never receives this kind of packets */
 402                 break;
 403
 404
 405         case DCERPC_PKT_RESPONSE:
 406
 407                 r = &pkt->u.response;
 408
 409                 /* Here's where we deal with incoming sign/seal. */
 410                 ret = dcerpc_check_auth(cli->auth, pkt,
 411                                         &r->stub_and_verifier,
 412                                         DCERPC_RESPONSE_LENGTH,
 413                                         pdu, &pad_len);
 414                 if (!NT_STATUS_IS_OK(ret)) {
 415                         return ret;
 416                 }
 417
 418                 if (pkt->frag_length < DCERPC_RESPONSE_LENGTH + pad_len) {
 419                         return NT_STATUS_BUFFER_TOO_SMALL;
 420                 }
 421
 422                 /* Point the return values at the NDR data. */
 423                 rdata->data = r->stub_and_verifier.data;
 424
 425                 if (pkt->auth_length) {
 426                         /* We've already done integer wrap tests in
 427                          * dcerpc_check_auth(). */
 428                         rdata->length = r->stub_and_verifier.length
 429                                          - pad_len
 430                                          - DCERPC_AUTH_TRAILER_LENGTH
 431                                          - pkt->auth_length;
 432                 } else {
 433                         rdata->length = r->stub_and_verifier.length;
 434                 }
 435
 436                 DEBUG(10, ("Got pdu len %lu, data_len %lu, ss_len %u\n",
 437                            (long unsigned int)pdu->length,
 438                            (long unsigned int)rdata->length,
 439                            (unsigned int)pad_len));
 440
 441                 /*
 442                  * If this is the first reply, and the allocation hint is
 443                  * reasonable, try and set up the reply_pdu DATA_BLOB to the
 444                  * correct size.
 445                  */
 446
 447                 if ((reply_pdu->length == 0) &&
 448                     r->alloc_hint && (r->alloc_hint < 15*1024*1024)) {
 449                         if (!data_blob_realloc(mem_ctx, reply_pdu,
 450                                                         r->alloc_hint)) {
 451                                 DEBUG(0, ("reply alloc hint %d too "
 452                                           "large to allocate\n",
 453                                           (int)r->alloc_hint));
 454                                 return NT_STATUS_NO_MEMORY;
 455                         }
 456                 }
 457
 458                 break;
 459
 460         case DCERPC_PKT_BIND_NAK:
 461                 DEBUG(1, (__location__ ": Bind NACK received from %s!\n",
 462                           rpccli_pipe_txt(talloc_tos(), cli)));
 463                 /* Use this for now... */
 464                 return NT_STATUS_NETWORK_ACCESS_DENIED;
 465
 466         case DCERPC_PKT_FAULT:
 467
 468                 DEBUG(1, (__location__ ": RPC fault code %s received "
 469                           "from %s!\n",
 470                           dcerpc_errstr(talloc_tos(),
 471                           pkt->u.fault.status),
 472                           rpccli_pipe_txt(talloc_tos(), cli)));
 473
 474                 return dcerpc_fault_to_nt_status(pkt->u.fault.status);
 475
 476         default:
 477                 DEBUG(0, (__location__ "Unknown packet type %u received "
 478                           "from %s!\n",
 479                           (unsigned int)pkt->ptype,
 480                           rpccli_pipe_txt(talloc_tos(), cli)));
 481                 return NT_STATUS_INVALID_INFO_CLASS;
 482         }
 483
 484         if (pkt->ptype != expected_pkt_type) {
 485                 DEBUG(3, (__location__ ": Connection to %s got an unexpected "
 486                           "RPC packet type - %u, not %u\n",
 487                           rpccli_pipe_txt(talloc_tos(), cli),
 488                           pkt->ptype, expected_pkt_type));
 489                 return NT_STATUS_INVALID_INFO_CLASS;
 490         }
 491
 492         /* Do this just before return - we don't want to modify any rpc header
 493            data before now as we may have needed to do cryptographic actions on
 494            it before. */
 495
 496         if ((pkt->ptype == DCERPC_PKT_BIND_ACK) &&
 497             !(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) {
 498                 DEBUG(5, (__location__ ": bug in server (AS/U?), setting "
 499                           "fragment first/last ON.\n"));
 500                 pkt->pfc_flags |= DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
 501         }
 502
 503         return NT_STATUS_OK;
 504 }
 505
 506 /****************************************************************************
 507  Call a remote api on an arbitrary pipe.  takes param, data and setup buffers.
 508 ****************************************************************************/
 509
 510 struct cli_api_pipe_state {
 511         struct event_context *ev;
 512         struct rpc_cli_transport *transport;
 513         uint8_t *rdata;
 514         uint32_t rdata_len;
 515 };
 516
 517 static void cli_api_pipe_trans_done(struct tevent_req *subreq);
 518 static void cli_api_pipe_write_done(struct tevent_req *subreq);
 519 static void cli_api_pipe_read_done(struct tevent_req *subreq);
 520
 521 static struct tevent_req *cli_api_pipe_send(TALLOC_CTX *mem_ctx,
 522                                             struct event_context *ev,
 523                                             struct rpc_cli_transport *transport,
 524                                             uint8_t *data, size_t data_len,
 525                                             uint32_t max_rdata_len)
 526 {
 527         struct tevent_req *req, *subreq;
 528         struct cli_api_pipe_state *state;
 529         NTSTATUS status;
 530
 531         req = tevent_req_create(mem_ctx, &state, struct cli_api_pipe_state);
 532         if (req == NULL) {
 533                 return NULL;
 534         }
 535         state->ev = ev;
 536         state->transport = transport;
 537
 538         if (max_rdata_len < RPC_HEADER_LEN) {
 539                 /*
 540                  * For a RPC reply we always need at least RPC_HEADER_LEN
 541                  * bytes. We check this here because we will receive
 542                  * RPC_HEADER_LEN bytes in cli_trans_sock_send_done.
 543                  */
 544                 status = NT_STATUS_INVALID_PARAMETER;
 545                 goto post_status;
 546         }
 547
 548         if (transport->trans_send != NULL) {
 549                 subreq = transport->trans_send(state, ev, data, data_len,
 550                                                max_rdata_len, transport->priv);
 551                 if (subreq == NULL) {
 552                         goto fail;
 553                 }
 554                 tevent_req_set_callback(subreq, cli_api_pipe_trans_done, req);
 555                 return req;
 556         }
 557
 558         /*
 559          * If the transport does not provide a "trans" routine, i.e. for
 560          * example the ncacn_ip_tcp transport, do the write/read step here.
 561          */
 562
 563         subreq = rpc_write_send(state, ev, transport, data, data_len);
 564         if (subreq == NULL) {
 565                 goto fail;
 566         }
 567         tevent_req_set_callback(subreq, cli_api_pipe_write_done, req);
 568         return req;
 569
 570  post_status:
 571         tevent_req_nterror(req, status);
 572         return tevent_req_post(req, ev);
 573  fail:
 574         TALLOC_FREE(req);
 575         return NULL;
 576 }
 577
 578 static void cli_api_pipe_trans_done(struct tevent_req *subreq)
 579 {
 580         struct tevent_req *req = tevent_req_callback_data(
 581                 subreq, struct tevent_req);
 582         struct cli_api_pipe_state *state = tevent_req_data(
 583                 req, struct cli_api_pipe_state);
 584         NTSTATUS status;
 585
 586         status = state->transport->trans_recv(subreq, state, &state->rdata,
 587                                               &state->rdata_len);
 588         TALLOC_FREE(subreq);
 589         if (!NT_STATUS_IS_OK(status)) {
 590                 tevent_req_nterror(req, status);
 591                 return;
 592         }
 593         tevent_req_done(req);
 594 }
 595
 596 static void cli_api_pipe_write_done(struct tevent_req *subreq)
 597 {
 598         struct tevent_req *req = tevent_req_callback_data(
 599                 subreq, struct tevent_req);
 600         struct cli_api_pipe_state *state = tevent_req_data(
 601                 req, struct cli_api_pipe_state);
 602         NTSTATUS status;
 603
 604         status = rpc_write_recv(subreq);
 605         TALLOC_FREE(subreq);
 606         if (!NT_STATUS_IS_OK(status)) {
 607                 tevent_req_nterror(req, status);
 608                 return;
 609         }
 610
 611         state->rdata = talloc_array(state, uint8_t, RPC_HEADER_LEN);
 612         if (tevent_req_nomem(state->rdata, req)) {
 613                 return;
 614         }
 615
 616         /*
 617          * We don't need to use rpc_read_send here, the upper layer will cope
 618          * with a short read, transport->trans_send could also return less
 619          * than state->max_rdata_len.
 620          */
 621         subreq = state->transport->read_send(state, state->ev, state->rdata,
 622                                              RPC_HEADER_LEN,
 623                                              state->transport->priv);
 624         if (tevent_req_nomem(subreq, req)) {
 625                 return;
 626         }
 627         tevent_req_set_callback(subreq, cli_api_pipe_read_done, req);
 628 }
 629
 630 static void cli_api_pipe_read_done(struct tevent_req *subreq)
 631 {
 632         struct tevent_req *req = tevent_req_callback_data(
 633                 subreq, struct tevent_req);
 634         struct cli_api_pipe_state *state = tevent_req_data(
 635                 req, struct cli_api_pipe_state);
 636         NTSTATUS status;
 637         ssize_t received;
 638
 639         status = state->transport->read_recv(subreq, &received);
 640         TALLOC_FREE(subreq);
 641         if (!NT_STATUS_IS_OK(status)) {
 642                 tevent_req_nterror(req, status);
 643                 return;
 644         }
 645         state->rdata_len = received;
 646         tevent_req_done(req);
 647 }
 648
 649 static NTSTATUS cli_api_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 650                                   uint8_t **prdata, uint32_t *prdata_len)
 651 {
 652         struct cli_api_pipe_state *state = tevent_req_data(
 653                 req, struct cli_api_pipe_state);
 654         NTSTATUS status;
 655
 656         if (tevent_req_is_nterror(req, &status)) {
 657                 return status;
 658         }
 659
 660         *prdata = talloc_move(mem_ctx, &state->rdata);
 661         *prdata_len = state->rdata_len;
 662         return NT_STATUS_OK;
 663 }
 664
 665 /****************************************************************************
 666  Send data on an rpc pipe via trans. The data must be the last
 667  pdu fragment of an NDR data stream.
 668
 669  Receive response data from an rpc pipe, which may be large...
 670
 671  Read the first fragment: unfortunately have to use SMBtrans for the first
 672  bit, then SMBreadX for subsequent bits.
 673
 674  If first fragment received also wasn't the last fragment, continue
 675  getting fragments until we _do_ receive the last fragment.
 676
 677  Request/Response PDU's look like the following...
 678
 679  |<------------------PDU len----------------------------------------------->|
 680  |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|
 681
 682  +------------+-----------------+-------------+---------------+-------------+
 683  | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR      | AUTH DATA   |
 684  +------------+-----------------+-------------+---------------+-------------+
 685
 686  Where the presence of the AUTH_HDR and AUTH DATA are dependent on the
 687  signing & sealing being negotiated.
 688
 689  ****************************************************************************/
 690
 691 struct rpc_api_pipe_state {
 692         struct event_context *ev;
 693         struct rpc_pipe_client *cli;
 694         uint8_t expected_pkt_type;
 695
 696         DATA_BLOB incoming_frag;
 697         struct ncacn_packet *pkt;
 698
 699         /* Incoming reply */
 700         DATA_BLOB reply_pdu;
 701         size_t reply_pdu_offset;
 702         uint8_t endianess;
 703 };
 704
 705 static void rpc_api_pipe_trans_done(struct tevent_req *subreq);
 706 static void rpc_api_pipe_got_pdu(struct tevent_req *subreq);
 707 static void rpc_api_pipe_auth3_done(struct tevent_req *subreq);
 708
 709 static struct tevent_req *rpc_api_pipe_send(TALLOC_CTX *mem_ctx,
 710                                             struct event_context *ev,
 711                                             struct rpc_pipe_client *cli,
 712                                             DATA_BLOB *data, /* Outgoing PDU */
 713                                             uint8_t expected_pkt_type)
 714 {
 715         struct tevent_req *req, *subreq;
 716         struct rpc_api_pipe_state *state;
 717         uint16_t max_recv_frag;
 718         NTSTATUS status;
 719
 720         req = tevent_req_create(mem_ctx, &state, struct rpc_api_pipe_state);
 721         if (req == NULL) {
 722                 return NULL;
 723         }
 724         state->ev = ev;
 725         state->cli = cli;
 726         state->expected_pkt_type = expected_pkt_type;
 727         state->incoming_frag = data_blob_null;
 728         state->reply_pdu = data_blob_null;
 729         state->reply_pdu_offset = 0;
 730         state->endianess = DCERPC_DREP_LE;
 731
 732         /*
 733          * Ensure we're not sending too much.
 734          */
 735         if (data->length > cli->max_xmit_frag) {
 736                 status = NT_STATUS_INVALID_PARAMETER;
 737                 goto post_status;
 738         }
 739
 740         DEBUG(5,("rpc_api_pipe: %s\n", rpccli_pipe_txt(talloc_tos(), cli)));
 741
 742         if (state->expected_pkt_type == DCERPC_PKT_AUTH3) {
 743                 subreq = rpc_write_send(state, ev, cli->transport,
 744                                         data->data, data->length);
 745                 if (subreq == NULL) {
 746                         goto fail;
 747                 }
 748                 tevent_req_set_callback(subreq, rpc_api_pipe_auth3_done, req);
 749                 return req;
 750         }
 751
 752         /* get the header first, then fetch the rest once we have
 753          * the frag_length available */
 754         max_recv_frag = RPC_HEADER_LEN;
 755
 756         subreq = cli_api_pipe_send(state, ev, cli->transport,
 757                                    data->data, data->length, max_recv_frag);
 758         if (subreq == NULL) {
 759                 goto fail;
 760         }
 761         tevent_req_set_callback(subreq, rpc_api_pipe_trans_done, req);
 762         return req;
 763
 764  post_status:
 765         tevent_req_nterror(req, status);
 766         return tevent_req_post(req, ev);
 767  fail:
 768         TALLOC_FREE(req);
 769         return NULL;
 770 }
 771
 772 static void rpc_api_pipe_auth3_done(struct tevent_req *subreq)
 773 {
 774         struct tevent_req *req =
 775                 tevent_req_callback_data(subreq,
 776                 struct tevent_req);
 777         NTSTATUS status;
 778
 779         status = rpc_write_recv(subreq);
 780         TALLOC_FREE(subreq);
 781         if (!NT_STATUS_IS_OK(status)) {
 782                 tevent_req_nterror(req, status);
 783                 return;
 784         }
 785
 786         tevent_req_done(req);
 787 }
 788
 789 static void rpc_api_pipe_trans_done(struct tevent_req *subreq)
 790 {
 791         struct tevent_req *req = tevent_req_callback_data(
 792                 subreq, struct tevent_req);
 793         struct rpc_api_pipe_state *state = tevent_req_data(
 794                 req, struct rpc_api_pipe_state);
 795         NTSTATUS status;
 796         uint8_t *rdata = NULL;
 797         uint32_t rdata_len = 0;
 798
 799         status = cli_api_pipe_recv(subreq, state, &rdata, &rdata_len);
 800         TALLOC_FREE(subreq);
 801         if (!NT_STATUS_IS_OK(status)) {
 802                 DEBUG(5, ("cli_api_pipe failed: %s\n", nt_errstr(status)));
 803                 tevent_req_nterror(req, status);
 804                 return;
 805         }
 806
 807         if (rdata == NULL) {
 808                 DEBUG(3,("rpc_api_pipe: %s failed to return data.\n",
 809                          rpccli_pipe_txt(talloc_tos(), state->cli)));
 810                 tevent_req_done(req);
 811                 return;
 812         }
 813
 814         /*
 815          * Move data on state->incoming_frag.
 816          */
 817         state->incoming_frag.data = talloc_move(state, &rdata);
 818         state->incoming_frag.length = rdata_len;
 819         if (!state->incoming_frag.data) {
 820                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 821                 return;
 822         }
 823
 824         /* Ensure we have enough data for a pdu. */
 825         subreq = get_complete_frag_send(state, state->ev, state->cli,
 826                                         &state->incoming_frag);
 827         if (tevent_req_nomem(subreq, req)) {
 828                 return;
 829         }
 830         tevent_req_set_callback(subreq, rpc_api_pipe_got_pdu, req);
 831 }
 832
 833 static void rpc_api_pipe_got_pdu(struct tevent_req *subreq)
 834 {
 835         struct tevent_req *req = tevent_req_callback_data(
 836                 subreq, struct tevent_req);
 837         struct rpc_api_pipe_state *state = tevent_req_data(
 838                 req, struct rpc_api_pipe_state);
 839         NTSTATUS status;
 840         DATA_BLOB rdata = data_blob_null;
 841
 842         status = get_complete_frag_recv(subreq);
 843         TALLOC_FREE(subreq);
 844         if (!NT_STATUS_IS_OK(status)) {
 845                 DEBUG(5, ("get_complete_frag failed: %s\n",
 846                           nt_errstr(status)));
 847                 tevent_req_nterror(req, status);
 848                 return;
 849         }
 850
 851         state->pkt = talloc(state, struct ncacn_packet);
 852         if (!state->pkt) {
 853                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 854                 return;
 855         }
 856
 857         status = dcerpc_pull_ncacn_packet(state->pkt,
 858                                           &state->incoming_frag,
 859                                           state->pkt,
 860                                           !state->endianess);
 861         if (!NT_STATUS_IS_OK(status)) {
 862                 tevent_req_nterror(req, status);
 863                 return;
 864         }
 865
 866         if (state->incoming_frag.length != state->pkt->frag_length) {
 867                 DEBUG(5, ("Incorrect pdu length %u, expected %u\n",
 868                           (unsigned int)state->incoming_frag.length,
 869                           (unsigned int)state->pkt->frag_length));
 870                 tevent_req_nterror(req,  NT_STATUS_INVALID_PARAMETER);
 871                 return;
 872         }
 873
 874         status = cli_pipe_validate_current_pdu(state,
 875                                                 state->cli, state->pkt,
 876                                                 &state->incoming_frag,
 877                                                 state->expected_pkt_type,
 878                                                 &rdata,
 879                                                 &state->reply_pdu);
 880
 881         DEBUG(10,("rpc_api_pipe: got frag len of %u at offset %u: %s\n",
 882                   (unsigned)state->incoming_frag.length,
 883                   (unsigned)state->reply_pdu_offset,
 884                   nt_errstr(status)));
 885
 886         if (!NT_STATUS_IS_OK(status)) {
 887                 tevent_req_nterror(req, status);
 888                 return;
 889         }
 890
 891         if ((state->pkt->pfc_flags & DCERPC_PFC_FLAG_FIRST)
 892             && (state->pkt->drep[0] != DCERPC_DREP_LE)) {
 893                 /*
 894                  * Set the data type correctly for big-endian data on the
 895                  * first packet.
 896                  */
 897                 DEBUG(10,("rpc_api_pipe: On %s PDU data format is "
 898                           "big-endian.\n",
 899                           rpccli_pipe_txt(talloc_tos(), state->cli)));
 900                 state->endianess = 0x00; /* BIG ENDIAN */
 901         }
 902         /*
 903          * Check endianness on subsequent packets.
 904          */
 905         if (state->endianess != state->pkt->drep[0]) {
 906                 DEBUG(0,("rpc_api_pipe: Error : Endianness changed from %s to "
 907                          "%s\n",
 908                          state->endianess?"little":"big",
 909                          state->pkt->drep[0]?"little":"big"));
 910                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 911                 return;
 912         }
 913
 914         /* Now copy the data portion out of the pdu into rbuf. */
 915         if (state->reply_pdu.length < state->reply_pdu_offset + rdata.length) {
 916                 if (!data_blob_realloc(NULL, &state->reply_pdu,
 917                                 state->reply_pdu_offset + rdata.length)) {
 918                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 919                         return;
 920                 }
 921         }
 922
 923         memcpy(state->reply_pdu.data + state->reply_pdu_offset,
 924                 rdata.data, rdata.length);
 925         state->reply_pdu_offset += rdata.length;
 926
 927         /* reset state->incoming_frag, there is no need to free it,
 928          * it will be reallocated to the right size the next time
 929          * it is used */
 930         state->incoming_frag.length = 0;
 931
 932         if (state->pkt->pfc_flags & DCERPC_PFC_FLAG_LAST) {
 933                 /* make sure the pdu length is right now that we
 934                  * have all the data available (alloc hint may
 935                  * have allocated more than was actually used) */
 936                 state->reply_pdu.length = state->reply_pdu_offset;
 937                 DEBUG(10,("rpc_api_pipe: %s returned %u bytes.\n",
 938                           rpccli_pipe_txt(talloc_tos(), state->cli),
 939                           (unsigned)state->reply_pdu.length));
 940                 tevent_req_done(req);
 941                 return;
 942         }
 943
 944         subreq = get_complete_frag_send(state, state->ev, state->cli,
 945                                         &state->incoming_frag);
 946         if (tevent_req_nomem(subreq, req)) {
 947                 return;
 948         }
 949         tevent_req_set_callback(subreq, rpc_api_pipe_got_pdu, req);
 950 }
 951
 952 static NTSTATUS rpc_api_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 953                                   struct ncacn_packet **pkt,
 954                                   DATA_BLOB *reply_pdu)
 955 {
 956         struct rpc_api_pipe_state *state = tevent_req_data(
 957                 req, struct rpc_api_pipe_state);
 958         NTSTATUS status;
 959
 960         if (tevent_req_is_nterror(req, &status)) {
 961                 return status;
 962         }
 963
 964         /* return data to caller and assign it ownership of memory */
 965         if (reply_pdu) {
 966                 reply_pdu->data = talloc_move(mem_ctx, &state->reply_pdu.data);
 967                 reply_pdu->length = state->reply_pdu.length;
 968                 state->reply_pdu.length = 0;
 969         } else {
 970                 data_blob_free(&state->reply_pdu);
 971         }
 972
 973         if (pkt) {
 974                 *pkt = talloc_steal(mem_ctx, state->pkt);
 975         }
 976
 977         return NT_STATUS_OK;
 978 }
 979
 980 /*******************************************************************
 981  Creates spnego auth bind.
 982  ********************************************************************/
 983
 984 static NTSTATUS create_spnego_auth_bind_req(TALLOC_CTX *mem_ctx,
 985                                             struct pipe_auth_data *auth,
 986                                             DATA_BLOB *auth_token)
 987 {
 988         struct spnego_context *spnego_ctx;
 989         DATA_BLOB in_token = data_blob_null;
 990         NTSTATUS status;
 991
 992         spnego_ctx = talloc_get_type_abort(auth->auth_ctx,
 993                                            struct spnego_context);
 994
 995         /* Negotiate the initial auth token */
 996         status = spnego_get_client_auth_token(mem_ctx, spnego_ctx,
 997                                               &in_token, auth_token);
 998         if (!NT_STATUS_IS_OK(status)) {
 999                 return status;
1000         }
1001
1002         DEBUG(5, ("Created GSS Authentication Token:\n"));
1003         dump_data(5, auth_token->data, auth_token->length);
1004
1005         return NT_STATUS_OK;
1006 }
1007
1008 /*******************************************************************
1009  Creates krb5 auth bind.
1010  ********************************************************************/
1011
1012 static NTSTATUS create_gssapi_auth_bind_req(TALLOC_CTX *mem_ctx,
1013                                             struct pipe_auth_data *auth,
1014                                             DATA_BLOB *auth_token)
1015 {
1016         struct gse_context *gse_ctx;
1017         DATA_BLOB in_token = data_blob_null;
1018         NTSTATUS status;
1019
1020         gse_ctx = talloc_get_type_abort(auth->auth_ctx,
1021                                         struct gse_context);
1022
1023         /* Negotiate the initial auth token */
1024         status = gse_get_client_auth_token(mem_ctx, gse_ctx,
1025                                            &in_token,
1026                                            auth_token);
1027         if (!NT_STATUS_IS_OK(status)) {
1028                 return status;
1029         }
1030
1031         DEBUG(5, ("Created GSS Authentication Token:\n"));
1032         dump_data(5, auth_token->data, auth_token->length);
1033
1034         return NT_STATUS_OK;
1035 }
1036
1037 /*******************************************************************
1038  Creates NTLMSSP auth bind.
1039  ********************************************************************/
1040
1041 static NTSTATUS create_generic_auth_rpc_bind_req(struct rpc_pipe_client *cli,
1042                                                  TALLOC_CTX *mem_ctx,
1043                                                  DATA_BLOB *auth_token)
1044 {
1045         struct gensec_security *gensec_security;
1046         DATA_BLOB null_blob = data_blob_null;
1047         NTSTATUS status;
1048
1049         gensec_security = talloc_get_type_abort(cli->auth->auth_ctx,
1050                                         struct gensec_security);
1051
1052         DEBUG(5, ("create_generic_auth_rpc_bind_req: Processing NTLMSSP Negotiate\n"));
1053         status = gensec_update(gensec_security, mem_ctx, NULL, null_blob, auth_token);
1054
1055         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1056                 data_blob_free(auth_token);
1057                 return status;
1058         }
1059
1060         return NT_STATUS_OK;
1061 }
1062
1063 /*******************************************************************
1064  Creates schannel auth bind.
1065  ********************************************************************/
1066
1067 static NTSTATUS create_schannel_auth_rpc_bind_req(struct rpc_pipe_client *cli,
1068                                                   DATA_BLOB *auth_token)
1069 {
1070         NTSTATUS status;
1071         struct NL_AUTH_MESSAGE r;
1072
1073         /* Use lp_workgroup() if domain not specified */
1074
1075         if (!cli->auth->domain || !cli->auth->domain[0]) {
1076                 cli->auth->domain = talloc_strdup(cli, lp_workgroup());
1077                 if (cli->auth->domain == NULL) {
1078                         return NT_STATUS_NO_MEMORY;
1079                 }
1080         }
1081
1082         /*
1083          * Now marshall the data into the auth parse_struct.
1084          */
1085
1086         r.MessageType                   = NL_NEGOTIATE_REQUEST;
1087         r.Flags                         = NL_FLAG_OEM_NETBIOS_DOMAIN_NAME |
1088                                           NL_FLAG_OEM_NETBIOS_COMPUTER_NAME;
1089         r.oem_netbios_domain.a          = cli->auth->domain;
1090         r.oem_netbios_computer.a        = lp_netbios_name();
1091
1092         status = dcerpc_push_schannel_bind(cli, &r, auth_token);
1093         if (!NT_STATUS_IS_OK(status)) {
1094                 return status;
1095         }
1096
1097         return NT_STATUS_OK;
1098 }
1099
1100 /*******************************************************************
1101  Creates the internals of a DCE/RPC bind request or alter context PDU.
1102  ********************************************************************/
1103
1104 static NTSTATUS create_bind_or_alt_ctx_internal(TALLOC_CTX *mem_ctx,
1105                                                 enum dcerpc_pkt_type ptype,
1106                                                 uint32 rpc_call_id,
1107                                                 const struct ndr_syntax_id *abstract,
1108                                                 const struct ndr_syntax_id *transfer,
1109                                                 const DATA_BLOB *auth_info,
1110                                                 DATA_BLOB *blob)
1111 {
1112         uint16 auth_len = auth_info->length;
1113         NTSTATUS status;
1114         union dcerpc_payload u;
1115         struct dcerpc_ctx_list ctx_list;
1116
1117         if (auth_len) {
1118                 auth_len -= DCERPC_AUTH_TRAILER_LENGTH;
1119         }
1120
1121         ctx_list.context_id = 0;
1122         ctx_list.num_transfer_syntaxes = 1;
1123         ctx_list.abstract_syntax = *abstract;
1124         ctx_list.transfer_syntaxes = (struct ndr_syntax_id *)discard_const(transfer);
1125
1126         u.bind.max_xmit_frag    = RPC_MAX_PDU_FRAG_LEN;
1127         u.bind.max_recv_frag    = RPC_MAX_PDU_FRAG_LEN;
1128         u.bind.assoc_group_id   = 0x0;
1129         u.bind.num_contexts     = 1;
1130         u.bind.ctx_list         = &ctx_list;
1131         u.bind.auth_info        = *auth_info;
1132
1133         status = dcerpc_push_ncacn_packet(mem_ctx,
1134                                           ptype,
1135                                           DCERPC_PFC_FLAG_FIRST |
1136                                           DCERPC_PFC_FLAG_LAST,
1137                                           auth_len,
1138                                           rpc_call_id,
1139                                           &u,
1140                                           blob);
1141         if (!NT_STATUS_IS_OK(status)) {
1142                 DEBUG(0, ("Failed to marshall bind/alter ncacn_packet.\n"));
1143                 return status;
1144         }
1145
1146         return NT_STATUS_OK;
1147 }
1148
1149 /*******************************************************************
1150  Creates a DCE/RPC bind request.
1151  ********************************************************************/
1152
1153 static NTSTATUS create_rpc_bind_req(TALLOC_CTX *mem_ctx,
1154                                     struct rpc_pipe_client *cli,
1155                                     struct pipe_auth_data *auth,
1156                                     uint32 rpc_call_id,
1157                                     const struct ndr_syntax_id *abstract,
1158                                     const struct ndr_syntax_id *transfer,
1159                                     DATA_BLOB *rpc_out)
1160 {
1161         DATA_BLOB auth_token = data_blob_null;
1162         DATA_BLOB auth_info = data_blob_null;
1163         NTSTATUS ret = NT_STATUS_OK;
1164
1165         switch (auth->auth_type) {
1166         case DCERPC_AUTH_TYPE_SCHANNEL:
1167                 ret = create_schannel_auth_rpc_bind_req(cli, &auth_token);
1168                 if (!NT_STATUS_IS_OK(ret)) {
1169                         return ret;
1170                 }
1171                 break;
1172
1173         case DCERPC_AUTH_TYPE_NTLMSSP:
1174                 ret = create_generic_auth_rpc_bind_req(cli, mem_ctx, &auth_token);
1175                 if (!NT_STATUS_IS_OK(ret)) {
1176                         return ret;
1177                 }
1178                 break;
1179
1180         case DCERPC_AUTH_TYPE_SPNEGO:
1181                 ret = create_spnego_auth_bind_req(cli, auth, &auth_token);
1182                 if (!NT_STATUS_IS_OK(ret)) {
1183                         return ret;
1184                 }
1185                 break;
1186
1187         case DCERPC_AUTH_TYPE_KRB5:
1188                 ret = create_gssapi_auth_bind_req(mem_ctx, auth, &auth_token);
1189                 if (!NT_STATUS_IS_OK(ret)) {
1190                         return ret;
1191                 }
1192                 break;
1193
1194         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1195                 auth_token = data_blob_talloc(mem_ctx,
1196                                               "NCALRPC_AUTH_TOKEN",
1197                                               18);
1198                 break;
1199
1200         case DCERPC_AUTH_TYPE_NONE:
1201                 break;
1202
1203         default:
1204                 /* "Can't" happen. */
1205                 return NT_STATUS_INVALID_INFO_CLASS;
1206         }
1207
1208         if (auth_token.length != 0) {
1209                 ret = dcerpc_push_dcerpc_auth(cli,
1210                                                 auth->auth_type,
1211                                                 auth->auth_level,
1212                                                 0, /* auth_pad_length */
1213                                                 1, /* auth_context_id */
1214                                                 &auth_token,
1215                                                 &auth_info);
1216                 if (!NT_STATUS_IS_OK(ret)) {
1217                         return ret;
1218                 }
1219                 data_blob_free(&auth_token);
1220         }
1221
1222         ret = create_bind_or_alt_ctx_internal(mem_ctx,
1223                                               DCERPC_PKT_BIND,
1224                                               rpc_call_id,
1225                                               abstract,
1226                                               transfer,
1227                                               &auth_info,
1228                                               rpc_out);
1229         return ret;
1230 }
1231
1232 /*******************************************************************
1233  External interface.
1234  Does an rpc request on a pipe. Incoming data is NDR encoded in in_data.
1235  Reply is NDR encoded in out_data. Splits the data stream into RPC PDU's
1236  and deals with signing/sealing details.
1237  ********************************************************************/
1238
1239 struct rpc_api_pipe_req_state {
1240         struct event_context *ev;
1241         struct rpc_pipe_client *cli;
1242         uint8_t op_num;
1243         uint32_t call_id;
1244         DATA_BLOB *req_data;
1245         uint32_t req_data_sent;
1246         DATA_BLOB rpc_out;
1247         DATA_BLOB reply_pdu;
1248 };
1249
1250 static void rpc_api_pipe_req_write_done(struct tevent_req *subreq);
1251 static void rpc_api_pipe_req_done(struct tevent_req *subreq);
1252 static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
1253                                   bool *is_last_frag);
1254
1255 struct tevent_req *rpc_api_pipe_req_send(TALLOC_CTX *mem_ctx,
1256                                          struct event_context *ev,
1257                                          struct rpc_pipe_client *cli,
1258                                          uint8_t op_num,
1259                                          DATA_BLOB *req_data)
1260 {
1261         struct tevent_req *req, *subreq;
1262         struct rpc_api_pipe_req_state *state;
1263         NTSTATUS status;
1264         bool is_last_frag;
1265
1266         req = tevent_req_create(mem_ctx, &state,
1267                                 struct rpc_api_pipe_req_state);
1268         if (req == NULL) {
1269                 return NULL;
1270         }
1271         state->ev = ev;
1272         state->cli = cli;
1273         state->op_num = op_num;
1274         state->req_data = req_data;
1275         state->req_data_sent = 0;
1276         state->call_id = get_rpc_call_id();
1277         state->reply_pdu = data_blob_null;
1278         state->rpc_out = data_blob_null;
1279
1280         if (cli->max_xmit_frag < DCERPC_REQUEST_LENGTH
1281                                         + RPC_MAX_SIGN_SIZE) {
1282                 /* Server is screwed up ! */
1283                 status = NT_STATUS_INVALID_PARAMETER;
1284                 goto post_status;
1285         }
1286
1287         status = prepare_next_frag(state, &is_last_frag);
1288         if (!NT_STATUS_IS_OK(status)) {
1289                 goto post_status;
1290         }
1291
1292         if (is_last_frag) {
1293                 subreq = rpc_api_pipe_send(state, ev, state->cli,
1294                                            &state->rpc_out,
1295                                            DCERPC_PKT_RESPONSE);
1296                 if (subreq == NULL) {
1297                         goto fail;
1298                 }
1299                 tevent_req_set_callback(subreq, rpc_api_pipe_req_done, req);
1300         } else {
1301                 subreq = rpc_write_send(state, ev, cli->transport,
1302                                         state->rpc_out.data,
1303                                         state->rpc_out.length);
1304                 if (subreq == NULL) {
1305                         goto fail;
1306                 }
1307                 tevent_req_set_callback(subreq, rpc_api_pipe_req_write_done,
1308                                         req);
1309         }
1310         return req;
1311
1312  post_status:
1313         tevent_req_nterror(req, status);
1314         return tevent_req_post(req, ev);
1315  fail:
1316         TALLOC_FREE(req);
1317         return NULL;
1318 }
1319
1320 static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
1321                                   bool *is_last_frag)
1322 {
1323         size_t data_sent_thistime;
1324         size_t auth_len;
1325         size_t frag_len;
1326         uint8_t flags = 0;
1327         size_t pad_len;
1328         size_t data_left;
1329         NTSTATUS status;
1330         union dcerpc_payload u;
1331
1332         data_left = state->req_data->length - state->req_data_sent;
1333
1334         status = dcerpc_guess_sizes(state->cli->auth,
1335                                     DCERPC_REQUEST_LENGTH, data_left,
1336                                     state->cli->max_xmit_frag,
1337                                     CLIENT_NDR_PADDING_SIZE,
1338                                     &data_sent_thistime,
1339                                     &frag_len, &auth_len, &pad_len);
1340         if (!NT_STATUS_IS_OK(status)) {
1341                 return status;
1342         }
1343
1344         if (state->req_data_sent == 0) {
1345                 flags = DCERPC_PFC_FLAG_FIRST;
1346         }
1347
1348         if (data_sent_thistime == data_left) {
1349                 flags |= DCERPC_PFC_FLAG_LAST;
1350         }
1351
1352         data_blob_free(&state->rpc_out);
1353
1354         ZERO_STRUCT(u.request);
1355
1356         u.request.alloc_hint    = state->req_data->length;
1357         u.request.context_id    = 0;
1358         u.request.opnum         = state->op_num;
1359
1360         status = dcerpc_push_ncacn_packet(state,
1361                                           DCERPC_PKT_REQUEST,
1362                                           flags,
1363                                           auth_len,
1364                                           state->call_id,
1365                                           &u,
1366                                           &state->rpc_out);
1367         if (!NT_STATUS_IS_OK(status)) {
1368                 return status;
1369         }
1370
1371         /* explicitly set frag_len here as dcerpc_push_ncacn_packet() can't
1372          * compute it right for requests because the auth trailer is missing
1373          * at this stage */
1374         dcerpc_set_frag_length(&state->rpc_out, frag_len);
1375
1376         /* Copy in the data. */
1377         if (!data_blob_append(NULL, &state->rpc_out,
1378                                 state->req_data->data + state->req_data_sent,
1379                                 data_sent_thistime)) {
1380                 return NT_STATUS_NO_MEMORY;
1381         }
1382
1383         switch (state->cli->auth->auth_level) {
1384         case DCERPC_AUTH_LEVEL_NONE:
1385         case DCERPC_AUTH_LEVEL_CONNECT:
1386         case DCERPC_AUTH_LEVEL_PACKET:
1387                 break;
1388         case DCERPC_AUTH_LEVEL_INTEGRITY:
1389         case DCERPC_AUTH_LEVEL_PRIVACY:
1390                 status = dcerpc_add_auth_footer(state->cli->auth, pad_len,
1391                                                 &state->rpc_out);
1392                 if (!NT_STATUS_IS_OK(status)) {
1393                         return status;
1394                 }
1395                 break;
1396         default:
1397                 return NT_STATUS_INVALID_PARAMETER;
1398         }
1399
1400         state->req_data_sent += data_sent_thistime;
1401         *is_last_frag = ((flags & DCERPC_PFC_FLAG_LAST) != 0);
1402
1403         return status;
1404 }
1405
1406 static void rpc_api_pipe_req_write_done(struct tevent_req *subreq)
1407 {
1408         struct tevent_req *req = tevent_req_callback_data(
1409                 subreq, struct tevent_req);
1410         struct rpc_api_pipe_req_state *state = tevent_req_data(
1411                 req, struct rpc_api_pipe_req_state);
1412         NTSTATUS status;
1413         bool is_last_frag;
1414
1415         status = rpc_write_recv(subreq);
1416         TALLOC_FREE(subreq);
1417         if (!NT_STATUS_IS_OK(status)) {
1418                 tevent_req_nterror(req, status);
1419                 return;
1420         }
1421
1422         status = prepare_next_frag(state, &is_last_frag);
1423         if (!NT_STATUS_IS_OK(status)) {
1424                 tevent_req_nterror(req, status);
1425                 return;
1426         }
1427
1428         if (is_last_frag) {
1429                 subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1430                                            &state->rpc_out,
1431                                            DCERPC_PKT_RESPONSE);
1432                 if (tevent_req_nomem(subreq, req)) {
1433                         return;
1434                 }
1435                 tevent_req_set_callback(subreq, rpc_api_pipe_req_done, req);
1436         } else {
1437                 subreq = rpc_write_send(state, state->ev,
1438                                         state->cli->transport,
1439                                         state->rpc_out.data,
1440                                         state->rpc_out.length);
1441                 if (tevent_req_nomem(subreq, req)) {
1442                         return;
1443                 }
1444                 tevent_req_set_callback(subreq, rpc_api_pipe_req_write_done,
1445                                         req);
1446         }
1447 }
1448
1449 static void rpc_api_pipe_req_done(struct tevent_req *subreq)
1450 {
1451         struct tevent_req *req = tevent_req_callback_data(
1452                 subreq, struct tevent_req);
1453         struct rpc_api_pipe_req_state *state = tevent_req_data(
1454                 req, struct rpc_api_pipe_req_state);
1455         NTSTATUS status;
1456
1457         status = rpc_api_pipe_recv(subreq, state, NULL, &state->reply_pdu);
1458         TALLOC_FREE(subreq);
1459         if (!NT_STATUS_IS_OK(status)) {
1460                 tevent_req_nterror(req, status);
1461                 return;
1462         }
1463         tevent_req_done(req);
1464 }
1465
1466 NTSTATUS rpc_api_pipe_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1467                                DATA_BLOB *reply_pdu)
1468 {
1469         struct rpc_api_pipe_req_state *state = tevent_req_data(
1470                 req, struct rpc_api_pipe_req_state);
1471         NTSTATUS status;
1472
1473         if (tevent_req_is_nterror(req, &status)) {
1474                 /*
1475                  * We always have to initialize to reply pdu, even if there is
1476                  * none. The rpccli_* caller routines expect this.
1477                  */
1478                 *reply_pdu = data_blob_null;
1479                 return status;
1480         }
1481
1482         /* return data to caller and assign it ownership of memory */
1483         reply_pdu->data = talloc_move(mem_ctx, &state->reply_pdu.data);
1484         reply_pdu->length = state->reply_pdu.length;
1485         state->reply_pdu.length = 0;
1486
1487         return NT_STATUS_OK;
1488 }
1489
1490 /****************************************************************************
1491  Check the rpc bind acknowledge response.
1492 ****************************************************************************/
1493
1494 static bool check_bind_response(const struct dcerpc_bind_ack *r,
1495                                 const struct ndr_syntax_id *transfer)
1496 {
1497         struct dcerpc_ack_ctx ctx;
1498
1499         if (r->secondary_address_size == 0) {
1500                 DEBUG(4,("Ignoring length check -- ASU bug (server didn't fill in the pipe name correctly)"));
1501         }
1502
1503         if (r->num_results < 1 || !r->ctx_list) {
1504                 return false;
1505         }
1506
1507         ctx = r->ctx_list[0];
1508
1509         /* check the transfer syntax */
1510         if ((ctx.syntax.if_version != transfer->if_version) ||
1511              (memcmp(&ctx.syntax.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) {
1512                 DEBUG(2,("bind_rpc_pipe: transfer syntax differs\n"));
1513                 return False;
1514         }
1515
1516         if (r->num_results != 0x1 || ctx.result != 0) {
1517                 DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n",
1518                           r->num_results, ctx.reason));
1519         }
1520
1521         DEBUG(5,("check_bind_response: accepted!\n"));
1522         return True;
1523 }
1524
1525 /*******************************************************************
1526  Creates a DCE/RPC bind authentication response.
1527  This is the packet that is sent back to the server once we
1528  have received a BIND-ACK, to finish the third leg of
1529  the authentication handshake.
1530  ********************************************************************/
1531
1532 static NTSTATUS create_rpc_bind_auth3(TALLOC_CTX *mem_ctx,
1533                                 struct rpc_pipe_client *cli,
1534                                 uint32 rpc_call_id,
1535                                 enum dcerpc_AuthType auth_type,
1536                                 enum dcerpc_AuthLevel auth_level,
1537                                 DATA_BLOB *pauth_blob,
1538                                 DATA_BLOB *rpc_out)
1539 {
1540         NTSTATUS status;
1541         union dcerpc_payload u;
1542
1543         u.auth3._pad = 0;
1544
1545         status = dcerpc_push_dcerpc_auth(mem_ctx,
1546                                          auth_type,
1547                                          auth_level,
1548                                          0, /* auth_pad_length */
1549                                          1, /* auth_context_id */
1550                                          pauth_blob,
1551                                          &u.auth3.auth_info);
1552         if (!NT_STATUS_IS_OK(status)) {
1553                 return status;
1554         }
1555
1556         status = dcerpc_push_ncacn_packet(mem_ctx,
1557                                           DCERPC_PKT_AUTH3,
1558                                           DCERPC_PFC_FLAG_FIRST |
1559                                           DCERPC_PFC_FLAG_LAST,
1560                                           pauth_blob->length,
1561                                           rpc_call_id,
1562                                           &u,
1563                                           rpc_out);
1564         data_blob_free(&u.auth3.auth_info);
1565         if (!NT_STATUS_IS_OK(status)) {
1566                 DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall RPC_HDR_RB.\n"));
1567                 return status;
1568         }
1569
1570         return NT_STATUS_OK;
1571 }
1572
1573 /*******************************************************************
1574  Creates a DCE/RPC bind alter context authentication request which
1575  may contain a spnego auth blobl
1576  ********************************************************************/
1577
1578 static NTSTATUS create_rpc_alter_context(TALLOC_CTX *mem_ctx,
1579                                         enum dcerpc_AuthType auth_type,
1580                                         enum dcerpc_AuthLevel auth_level,
1581                                         uint32 rpc_call_id,
1582                                         const struct ndr_syntax_id *abstract,
1583                                         const struct ndr_syntax_id *transfer,
1584                                         const DATA_BLOB *pauth_blob, /* spnego auth blob already created. */
1585                                         DATA_BLOB *rpc_out)
1586 {
1587         DATA_BLOB auth_info;
1588         NTSTATUS status;
1589
1590         status = dcerpc_push_dcerpc_auth(mem_ctx,
1591                                          auth_type,
1592                                          auth_level,
1593                                          0, /* auth_pad_length */
1594                                          1, /* auth_context_id */
1595                                          pauth_blob,
1596                                          &auth_info);
1597         if (!NT_STATUS_IS_OK(status)) {
1598                 return status;
1599         }
1600
1601         status = create_bind_or_alt_ctx_internal(mem_ctx,
1602                                                  DCERPC_PKT_ALTER,
1603                                                  rpc_call_id,
1604                                                  abstract,
1605                                                  transfer,
1606                                                  &auth_info,
1607                                                  rpc_out);
1608         data_blob_free(&auth_info);
1609         return status;
1610 }
1611
1612 /****************************************************************************
1613  Do an rpc bind.
1614 ****************************************************************************/
1615
1616 struct rpc_pipe_bind_state {
1617         struct event_context *ev;
1618         struct rpc_pipe_client *cli;
1619         DATA_BLOB rpc_out;
1620         bool auth3;
1621         uint32_t rpc_call_id;
1622 };
1623
1624 static void rpc_pipe_bind_step_one_done(struct tevent_req *subreq);
1625 static NTSTATUS rpc_bind_next_send(struct tevent_req *req,
1626                                    struct rpc_pipe_bind_state *state,
1627                                    DATA_BLOB *credentials);
1628 static NTSTATUS rpc_bind_finish_send(struct tevent_req *req,
1629                                      struct rpc_pipe_bind_state *state,
1630                                      DATA_BLOB *credentials);
1631
1632 struct tevent_req *rpc_pipe_bind_send(TALLOC_CTX *mem_ctx,
1633                                       struct event_context *ev,
1634                                       struct rpc_pipe_client *cli,
1635                                       struct pipe_auth_data *auth)
1636 {
1637         struct tevent_req *req, *subreq;
1638         struct rpc_pipe_bind_state *state;
1639         NTSTATUS status;
1640
1641         req = tevent_req_create(mem_ctx, &state, struct rpc_pipe_bind_state);
1642         if (req == NULL) {
1643                 return NULL;
1644         }
1645
1646         DEBUG(5,("Bind RPC Pipe: %s auth_type %u, auth_level %u\n",
1647                 rpccli_pipe_txt(talloc_tos(), cli),
1648                 (unsigned int)auth->auth_type,
1649                 (unsigned int)auth->auth_level ));
1650
1651         state->ev = ev;
1652         state->cli = cli;
1653         state->rpc_call_id = get_rpc_call_id();
1654
1655         cli->auth = talloc_move(cli, &auth);
1656
1657         /* Marshall the outgoing data. */
1658         status = create_rpc_bind_req(state, cli,
1659                                      cli->auth,
1660                                      state->rpc_call_id,
1661                                      &cli->abstract_syntax,
1662                                      &cli->transfer_syntax,
1663                                      &state->rpc_out);
1664
1665         if (!NT_STATUS_IS_OK(status)) {
1666                 goto post_status;
1667         }
1668
1669         subreq = rpc_api_pipe_send(state, ev, cli, &state->rpc_out,
1670                                    DCERPC_PKT_BIND_ACK);
1671         if (subreq == NULL) {
1672                 goto fail;
1673         }
1674         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1675         return req;
1676
1677  post_status:
1678         tevent_req_nterror(req, status);
1679         return tevent_req_post(req, ev);
1680  fail:
1681         TALLOC_FREE(req);
1682         return NULL;
1683 }
1684
1685 static void rpc_pipe_bind_step_one_done(struct tevent_req *subreq)
1686 {
1687         struct tevent_req *req = tevent_req_callback_data(
1688                 subreq, struct tevent_req);
1689         struct rpc_pipe_bind_state *state = tevent_req_data(
1690                 req, struct rpc_pipe_bind_state);
1691         struct pipe_auth_data *pauth = state->cli->auth;
1692         struct gensec_security *gensec_security;
1693         struct spnego_context *spnego_ctx;
1694         struct gse_context *gse_ctx;
1695         struct ncacn_packet *pkt = NULL;
1696         struct dcerpc_auth auth;
1697         DATA_BLOB auth_token = data_blob_null;
1698         NTSTATUS status;
1699
1700         status = rpc_api_pipe_recv(subreq, talloc_tos(), &pkt, NULL);
1701         TALLOC_FREE(subreq);
1702         if (!NT_STATUS_IS_OK(status)) {
1703                 DEBUG(3, ("rpc_pipe_bind: %s bind request returned %s\n",
1704                           rpccli_pipe_txt(talloc_tos(), state->cli),
1705                           nt_errstr(status)));
1706                 tevent_req_nterror(req, status);
1707                 return;
1708         }
1709
1710         if (state->auth3) {
1711                 tevent_req_done(req);
1712                 return;
1713         }
1714
1715         if (!check_bind_response(&pkt->u.bind_ack, &state->cli->transfer_syntax)) {
1716                 DEBUG(2, ("rpc_pipe_bind: check_bind_response failed.\n"));
1717                 tevent_req_nterror(req, NT_STATUS_BUFFER_TOO_SMALL);
1718                 return;
1719         }
1720
1721         state->cli->max_xmit_frag = pkt->u.bind_ack.max_xmit_frag;
1722         state->cli->max_recv_frag = pkt->u.bind_ack.max_recv_frag;
1723
1724         switch(pauth->auth_type) {
1725
1726         case DCERPC_AUTH_TYPE_NONE:
1727         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1728         case DCERPC_AUTH_TYPE_SCHANNEL:
1729                 /* Bind complete. */
1730                 tevent_req_done(req);
1731                 return;
1732
1733         case DCERPC_AUTH_TYPE_NTLMSSP:
1734         case DCERPC_AUTH_TYPE_SPNEGO:
1735         case DCERPC_AUTH_TYPE_KRB5:
1736                 /* Paranoid lenght checks */
1737                 if (pkt->frag_length < DCERPC_AUTH_TRAILER_LENGTH
1738                                                 + pkt->auth_length) {
1739                         tevent_req_nterror(req,
1740                                         NT_STATUS_INFO_LENGTH_MISMATCH);
1741                         return;
1742                 }
1743                 /* get auth credentials */
1744                 status = dcerpc_pull_dcerpc_auth(talloc_tos(),
1745                                                  &pkt->u.bind_ack.auth_info,
1746                                                  &auth, false);
1747                 if (!NT_STATUS_IS_OK(status)) {
1748                         DEBUG(0, ("Failed to pull dcerpc auth: %s.\n",
1749                                   nt_errstr(status)));
1750                         tevent_req_nterror(req, status);
1751                         return;
1752                 }
1753                 break;
1754
1755         default:
1756                 goto err_out;
1757         }
1758
1759         /*
1760          * For authenticated binds we may need to do 3 or 4 leg binds.
1761          */
1762
1763         switch(pauth->auth_type) {
1764
1765         case DCERPC_AUTH_TYPE_NONE:
1766         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1767         case DCERPC_AUTH_TYPE_SCHANNEL:
1768                 /* Bind complete. */
1769                 tevent_req_done(req);
1770                 return;
1771
1772         case DCERPC_AUTH_TYPE_NTLMSSP:
1773                 gensec_security = talloc_get_type_abort(pauth->auth_ctx,
1774                                                 struct gensec_security);
1775                 status = gensec_update(gensec_security, state, NULL,
1776                                        auth.credentials, &auth_token);
1777                 if (NT_STATUS_EQUAL(status,
1778                                     NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1779                         status = rpc_bind_next_send(req, state,
1780                                                         &auth_token);
1781                 } else if (NT_STATUS_IS_OK(status)) {
1782                         status = rpc_bind_finish_send(req, state,
1783                                                         &auth_token);
1784                 }
1785                 break;
1786
1787         case DCERPC_AUTH_TYPE_SPNEGO:
1788                 spnego_ctx = talloc_get_type_abort(pauth->auth_ctx,
1789                                                    struct spnego_context);
1790                 status = spnego_get_client_auth_token(state,
1791                                                 spnego_ctx,
1792                                                 &auth.credentials,
1793                                                 &auth_token);
1794                 if (!NT_STATUS_IS_OK(status)) {
1795                         break;
1796                 }
1797                 if (auth_token.length == 0) {
1798                         /* Bind complete. */
1799                         tevent_req_done(req);
1800                         return;
1801                 }
1802                 if (spnego_require_more_processing(spnego_ctx)) {
1803                         status = rpc_bind_next_send(req, state,
1804                                                         &auth_token);
1805                 } else {
1806                         status = rpc_bind_finish_send(req, state,
1807                                                         &auth_token);
1808                 }
1809                 break;
1810
1811         case DCERPC_AUTH_TYPE_KRB5:
1812                 gse_ctx = talloc_get_type_abort(pauth->auth_ctx,
1813                                                 struct gse_context);
1814                 status = gse_get_client_auth_token(state,
1815                                                    gse_ctx,
1816                                                    &auth.credentials,
1817                                                    &auth_token);
1818                 if (!NT_STATUS_IS_OK(status)) {
1819                         break;
1820                 }
1821
1822                 if (gse_require_more_processing(gse_ctx)) {
1823                         status = rpc_bind_next_send(req, state, &auth_token);
1824                 } else {
1825                         status = rpc_bind_finish_send(req, state, &auth_token);
1826                 }
1827                 break;
1828
1829         default:
1830                 goto err_out;
1831         }
1832
1833         if (!NT_STATUS_IS_OK(status)) {
1834                 tevent_req_nterror(req, status);
1835         }
1836         return;
1837
1838 err_out:
1839         DEBUG(0,("cli_finish_bind_auth: unknown auth type %u\n",
1840                  (unsigned int)state->cli->auth->auth_type));
1841         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1842 }
1843
1844 static NTSTATUS rpc_bind_next_send(struct tevent_req *req,
1845                                    struct rpc_pipe_bind_state *state,
1846                                    DATA_BLOB *auth_token)
1847 {
1848         struct pipe_auth_data *auth = state->cli->auth;
1849         struct tevent_req *subreq;
1850         NTSTATUS status;
1851
1852         /* Now prepare the alter context pdu. */
1853         data_blob_free(&state->rpc_out);
1854
1855         status = create_rpc_alter_context(state,
1856                                           auth->auth_type,
1857                                           auth->auth_level,
1858                                           state->rpc_call_id,
1859                                           &state->cli->abstract_syntax,
1860                                           &state->cli->transfer_syntax,
1861                                           auth_token,
1862                                           &state->rpc_out);
1863         if (!NT_STATUS_IS_OK(status)) {
1864                 return status;
1865         }
1866
1867         subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1868                                    &state->rpc_out, DCERPC_PKT_ALTER_RESP);
1869         if (subreq == NULL) {
1870                 return NT_STATUS_NO_MEMORY;
1871         }
1872         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1873         return NT_STATUS_OK;
1874 }
1875
1876 static NTSTATUS rpc_bind_finish_send(struct tevent_req *req,
1877                                      struct rpc_pipe_bind_state *state,
1878                                      DATA_BLOB *auth_token)
1879 {
1880         struct pipe_auth_data *auth = state->cli->auth;
1881         struct tevent_req *subreq;
1882         NTSTATUS status;
1883
1884         state->auth3 = true;
1885
1886         /* Now prepare the auth3 context pdu. */
1887         data_blob_free(&state->rpc_out);
1888
1889         status = create_rpc_bind_auth3(state, state->cli,
1890                                         state->rpc_call_id,
1891                                         auth->auth_type,
1892                                         auth->auth_level,
1893                                         auth_token,
1894                                         &state->rpc_out);
1895         if (!NT_STATUS_IS_OK(status)) {
1896                 return status;
1897         }
1898
1899         subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1900                                    &state->rpc_out, DCERPC_PKT_AUTH3);
1901         if (subreq == NULL) {
1902                 return NT_STATUS_NO_MEMORY;
1903         }
1904         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1905         return NT_STATUS_OK;
1906 }
1907
1908 NTSTATUS rpc_pipe_bind_recv(struct tevent_req *req)
1909 {
1910         return tevent_req_simple_recv_ntstatus(req);
1911 }
1912
1913 NTSTATUS rpc_pipe_bind(struct rpc_pipe_client *cli,
1914                        struct pipe_auth_data *auth)
1915 {
1916         TALLOC_CTX *frame = talloc_stackframe();
1917         struct event_context *ev;
1918         struct tevent_req *req;
1919         NTSTATUS status = NT_STATUS_OK;
1920
1921         ev = event_context_init(frame);
1922         if (ev == NULL) {
1923                 status = NT_STATUS_NO_MEMORY;
1924                 goto fail;
1925         }
1926
1927         req = rpc_pipe_bind_send(frame, ev, cli, auth);
1928         if (req == NULL) {
1929                 status = NT_STATUS_NO_MEMORY;
1930                 goto fail;
1931         }
1932
1933         if (!tevent_req_poll(req, ev)) {
1934                 status = map_nt_error_from_unix(errno);
1935                 goto fail;
1936         }
1937
1938         status = rpc_pipe_bind_recv(req);
1939  fail:
1940         TALLOC_FREE(frame);
1941         return status;
1942 }
1943
1944 #define RPCCLI_DEFAULT_TIMEOUT 10000 /* 10 seconds. */
1945
1946 unsigned int rpccli_set_timeout(struct rpc_pipe_client *rpc_cli,
1947                                 unsigned int timeout)
1948 {
1949         unsigned int old;
1950
1951         if (rpc_cli->transport == NULL) {
1952                 return RPCCLI_DEFAULT_TIMEOUT;
1953         }
1954
1955         if (rpc_cli->transport->set_timeout == NULL) {
1956                 return RPCCLI_DEFAULT_TIMEOUT;
1957         }
1958
1959         old = rpc_cli->transport->set_timeout(rpc_cli->transport->priv, timeout);
1960         if (old == 0) {
1961                 return RPCCLI_DEFAULT_TIMEOUT;
1962         }
1963
1964         return old;
1965 }
1966
1967 bool rpccli_is_connected(struct rpc_pipe_client *rpc_cli)
1968 {
1969         if (rpc_cli == NULL) {
1970                 return false;
1971         }
1972
1973         if (rpc_cli->transport == NULL) {
1974                 return false;
1975         }
1976
1977         return rpc_cli->transport->is_connected(rpc_cli->transport->priv);
1978 }
1979
1980 struct rpccli_bh_state {
1981         struct rpc_pipe_client *rpc_cli;
1982 };
1983
1984 static bool rpccli_bh_is_connected(struct dcerpc_binding_handle *h)
1985 {
1986         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
1987                                      struct rpccli_bh_state);
1988
1989         return rpccli_is_connected(hs->rpc_cli);
1990 }
1991
1992 static uint32_t rpccli_bh_set_timeout(struct dcerpc_binding_handle *h,
1993                                       uint32_t timeout)
1994 {
1995         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
1996                                      struct rpccli_bh_state);
1997
1998         return rpccli_set_timeout(hs->rpc_cli, timeout);
1999 }
2000
2001 struct rpccli_bh_raw_call_state {
2002         DATA_BLOB in_data;
2003         DATA_BLOB out_data;
2004         uint32_t out_flags;
2005 };
2006
2007 static void rpccli_bh_raw_call_done(struct tevent_req *subreq);
2008
2009 static struct tevent_req *rpccli_bh_raw_call_send(TALLOC_CTX *mem_ctx,
2010                                                   struct tevent_context *ev,
2011                                                   struct dcerpc_binding_handle *h,
2012                                                   const struct GUID *object,
2013                                                   uint32_t opnum,
2014                                                   uint32_t in_flags,
2015                                                   const uint8_t *in_data,
2016                                                   size_t in_length)
2017 {
2018         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2019                                      struct rpccli_bh_state);
2020         struct tevent_req *req;
2021         struct rpccli_bh_raw_call_state *state;
2022         bool ok;
2023         struct tevent_req *subreq;
2024
2025         req = tevent_req_create(mem_ctx, &state,
2026                                 struct rpccli_bh_raw_call_state);
2027         if (req == NULL) {
2028                 return NULL;
2029         }
2030         state->in_data.data = discard_const_p(uint8_t, in_data);
2031         state->in_data.length = in_length;
2032
2033         ok = rpccli_bh_is_connected(h);
2034         if (!ok) {
2035                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
2036                 return tevent_req_post(req, ev);
2037         }
2038
2039         subreq = rpc_api_pipe_req_send(state, ev, hs->rpc_cli,
2040                                        opnum, &state->in_data);
2041         if (tevent_req_nomem(subreq, req)) {
2042                 return tevent_req_post(req, ev);
2043         }
2044         tevent_req_set_callback(subreq, rpccli_bh_raw_call_done, req);
2045
2046         return req;
2047 }
2048
2049 static void rpccli_bh_raw_call_done(struct tevent_req *subreq)
2050 {
2051         struct tevent_req *req =
2052                 tevent_req_callback_data(subreq,
2053                 struct tevent_req);
2054         struct rpccli_bh_raw_call_state *state =
2055                 tevent_req_data(req,
2056                 struct rpccli_bh_raw_call_state);
2057         NTSTATUS status;
2058
2059         state->out_flags = 0;
2060
2061         /* TODO: support bigendian responses */
2062
2063         status = rpc_api_pipe_req_recv(subreq, state, &state->out_data);
2064         TALLOC_FREE(subreq);
2065         if (!NT_STATUS_IS_OK(status)) {
2066                 tevent_req_nterror(req, status);
2067                 return;
2068         }
2069
2070         tevent_req_done(req);
2071 }
2072
2073 static NTSTATUS rpccli_bh_raw_call_recv(struct tevent_req *req,
2074                                         TALLOC_CTX *mem_ctx,
2075                                         uint8_t **out_data,
2076                                         size_t *out_length,
2077                                         uint32_t *out_flags)
2078 {
2079         struct rpccli_bh_raw_call_state *state =
2080                 tevent_req_data(req,
2081                 struct rpccli_bh_raw_call_state);
2082         NTSTATUS status;
2083
2084         if (tevent_req_is_nterror(req, &status)) {
2085                 tevent_req_received(req);
2086                 return status;
2087         }
2088
2089         *out_data = talloc_move(mem_ctx, &state->out_data.data);
2090         *out_length = state->out_data.length;
2091         *out_flags = state->out_flags;
2092         tevent_req_received(req);
2093         return NT_STATUS_OK;
2094 }
2095
2096 struct rpccli_bh_disconnect_state {
2097         uint8_t _dummy;
2098 };
2099
2100 static struct tevent_req *rpccli_bh_disconnect_send(TALLOC_CTX *mem_ctx,
2101                                                 struct tevent_context *ev,
2102                                                 struct dcerpc_binding_handle *h)
2103 {
2104         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2105                                      struct rpccli_bh_state);
2106         struct tevent_req *req;
2107         struct rpccli_bh_disconnect_state *state;
2108         bool ok;
2109
2110         req = tevent_req_create(mem_ctx, &state,
2111                                 struct rpccli_bh_disconnect_state);
2112         if (req == NULL) {
2113                 return NULL;
2114         }
2115
2116         ok = rpccli_bh_is_connected(h);
2117         if (!ok) {
2118                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
2119                 return tevent_req_post(req, ev);
2120         }
2121
2122         /*
2123          * TODO: do a real async disconnect ...
2124          *
2125          * For now the caller needs to free rpc_cli
2126          */
2127         hs->rpc_cli = NULL;
2128
2129         tevent_req_done(req);
2130         return tevent_req_post(req, ev);
2131 }
2132
2133 static NTSTATUS rpccli_bh_disconnect_recv(struct tevent_req *req)
2134 {
2135         NTSTATUS status;
2136
2137         if (tevent_req_is_nterror(req, &status)) {
2138                 tevent_req_received(req);
2139                 return status;
2140         }
2141
2142         tevent_req_received(req);
2143         return NT_STATUS_OK;
2144 }
2145
2146 static bool rpccli_bh_ref_alloc(struct dcerpc_binding_handle *h)
2147 {
2148         return true;
2149 }
2150
2151 static void rpccli_bh_do_ndr_print(struct dcerpc_binding_handle *h,
2152                                    int ndr_flags,
2153                                    const void *_struct_ptr,
2154                                    const struct ndr_interface_call *call)
2155 {
2156         void *struct_ptr = discard_const(_struct_ptr);
2157
2158         if (DEBUGLEVEL < 10) {
2159                 return;
2160         }
2161
2162         if (ndr_flags & NDR_IN) {
2163                 ndr_print_function_debug(call->ndr_print,
2164                                          call->name,
2165                                          ndr_flags,
2166                                          struct_ptr);
2167         }
2168         if (ndr_flags & NDR_OUT) {
2169                 ndr_print_function_debug(call->ndr_print,
2170                                          call->name,
2171                                          ndr_flags,
2172                                          struct_ptr);
2173         }
2174 }
2175
2176 static const struct dcerpc_binding_handle_ops rpccli_bh_ops = {
2177         .name                   = "rpccli",
2178         .is_connected           = rpccli_bh_is_connected,
2179         .set_timeout            = rpccli_bh_set_timeout,
2180         .raw_call_send          = rpccli_bh_raw_call_send,
2181         .raw_call_recv          = rpccli_bh_raw_call_recv,
2182         .disconnect_send        = rpccli_bh_disconnect_send,
2183         .disconnect_recv        = rpccli_bh_disconnect_recv,
2184
2185         .ref_alloc              = rpccli_bh_ref_alloc,
2186         .do_ndr_print           = rpccli_bh_do_ndr_print,
2187 };
2188
2189 /* initialise a rpc_pipe_client binding handle */
2190 struct dcerpc_binding_handle *rpccli_bh_create(struct rpc_pipe_client *c)
2191 {
2192         struct dcerpc_binding_handle *h;
2193         struct rpccli_bh_state *hs;
2194
2195         h = dcerpc_binding_handle_create(c,
2196                                          &rpccli_bh_ops,
2197                                          NULL,
2198                                          NULL, /* TODO */
2199                                          &hs,
2200                                          struct rpccli_bh_state,
2201                                          __location__);
2202         if (h == NULL) {
2203                 return NULL;
2204         }
2205         hs->rpc_cli = c;
2206
2207         return h;
2208 }
2209
2210 NTSTATUS rpccli_ncalrpc_bind_data(TALLOC_CTX *mem_ctx,
2211                                   struct pipe_auth_data **presult)
2212 {
2213         struct pipe_auth_data *result;
2214
2215         result = talloc(mem_ctx, struct pipe_auth_data);
2216         if (result == NULL) {
2217                 return NT_STATUS_NO_MEMORY;
2218         }
2219
2220         result->auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM;
2221         result->auth_level = DCERPC_AUTH_LEVEL_CONNECT;
2222
2223         result->user_name = talloc_strdup(result, "");
2224         result->domain = talloc_strdup(result, "");
2225         if ((result->user_name == NULL) || (result->domain == NULL)) {
2226                 TALLOC_FREE(result);
2227                 return NT_STATUS_NO_MEMORY;
2228         }
2229
2230         *presult = result;
2231         return NT_STATUS_OK;
2232 }
2233
2234 NTSTATUS rpccli_anon_bind_data(TALLOC_CTX *mem_ctx,
2235                                struct pipe_auth_data **presult)
2236 {
2237         struct pipe_auth_data *result;
2238
2239         result = talloc(mem_ctx, struct pipe_auth_data);
2240         if (result == NULL) {
2241                 return NT_STATUS_NO_MEMORY;
2242         }
2243
2244         result->auth_type = DCERPC_AUTH_TYPE_NONE;
2245         result->auth_level = DCERPC_AUTH_LEVEL_NONE;
2246
2247         result->user_name = talloc_strdup(result, "");
2248         result->domain = talloc_strdup(result, "");
2249         if ((result->user_name == NULL) || (result->domain == NULL)) {
2250                 TALLOC_FREE(result);
2251                 return NT_STATUS_NO_MEMORY;
2252         }
2253
2254         *presult = result;
2255         return NT_STATUS_OK;
2256 }
2257
2258 static NTSTATUS rpccli_ntlmssp_bind_data(TALLOC_CTX *mem_ctx,
2259                                   enum dcerpc_AuthType auth_type,
2260                                   enum dcerpc_AuthLevel auth_level,
2261                                   const char *domain,
2262                                   const char *username,
2263                                   const char *password,
2264                                   struct pipe_auth_data **presult)
2265 {
2266         struct auth_generic_state *ntlmssp_ctx;
2267         struct pipe_auth_data *result;
2268         NTSTATUS status;
2269
2270         result = talloc(mem_ctx, struct pipe_auth_data);
2271         if (result == NULL) {
2272                 return NT_STATUS_NO_MEMORY;
2273         }
2274
2275         result->auth_type = auth_type;
2276         result->auth_level = auth_level;
2277
2278         result->user_name = talloc_strdup(result, username);
2279         result->domain = talloc_strdup(result, domain);
2280         if ((result->user_name == NULL) || (result->domain == NULL)) {
2281                 status = NT_STATUS_NO_MEMORY;
2282                 goto fail;
2283         }
2284
2285         status = auth_generic_client_prepare(result,
2286                                              &ntlmssp_ctx);
2287         if (!NT_STATUS_IS_OK(status)) {
2288                 goto fail;
2289         }
2290
2291         status = auth_generic_set_username(ntlmssp_ctx, username);
2292         if (!NT_STATUS_IS_OK(status)) {
2293                 goto fail;
2294         }
2295
2296         status = auth_generic_set_domain(ntlmssp_ctx, domain);
2297         if (!NT_STATUS_IS_OK(status)) {
2298                 goto fail;
2299         }
2300
2301         status = auth_generic_set_password(ntlmssp_ctx, password);
2302         if (!NT_STATUS_IS_OK(status)) {
2303                 goto fail;
2304         }
2305
2306         status = auth_generic_client_start_by_authtype(ntlmssp_ctx, auth_type, auth_level);
2307         if (!NT_STATUS_IS_OK(status)) {
2308                 goto fail;
2309         }
2310
2311         result->auth_ctx = talloc_move(result, &ntlmssp_ctx->gensec_security);
2312         talloc_free(ntlmssp_ctx);
2313         *presult = result;
2314         return NT_STATUS_OK;
2315
2316  fail:
2317         TALLOC_FREE(result);
2318         return status;
2319 }
2320
2321 NTSTATUS rpccli_schannel_bind_data(TALLOC_CTX *mem_ctx, const char *domain,
2322                                    enum dcerpc_AuthLevel auth_level,
2323                                    struct netlogon_creds_CredentialState *creds,
2324                                    struct pipe_auth_data **presult)
2325 {
2326         struct schannel_state *schannel_auth;
2327         struct pipe_auth_data *result;
2328
2329         result = talloc(mem_ctx, struct pipe_auth_data);
2330         if (result == NULL) {
2331                 return NT_STATUS_NO_MEMORY;
2332         }
2333
2334         result->auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
2335         result->auth_level = auth_level;
2336
2337         result->user_name = talloc_strdup(result, "");
2338         result->domain = talloc_strdup(result, domain);
2339         if ((result->user_name == NULL) || (result->domain == NULL)) {
2340                 goto fail;
2341         }
2342
2343         schannel_auth = talloc(result, struct schannel_state);
2344         if (schannel_auth == NULL) {
2345                 goto fail;
2346         }
2347
2348         schannel_auth->state = SCHANNEL_STATE_START;
2349         schannel_auth->seq_num = 0;
2350         schannel_auth->initiator = true;
2351         schannel_auth->creds = netlogon_creds_copy(result, creds);
2352
2353         result->auth_ctx = schannel_auth;
2354         *presult = result;
2355         return NT_STATUS_OK;
2356
2357  fail:
2358         TALLOC_FREE(result);
2359         return NT_STATUS_NO_MEMORY;
2360 }
2361
2362 /**
2363  * Create an rpc pipe client struct, connecting to a tcp port.
2364  */
2365 static NTSTATUS rpc_pipe_open_tcp_port(TALLOC_CTX *mem_ctx, const char *host,
2366                                        uint16_t port,
2367                                        const struct ndr_syntax_id *abstract_syntax,
2368                                        struct rpc_pipe_client **presult)
2369 {
2370         struct rpc_pipe_client *result;
2371         struct sockaddr_storage addr;
2372         NTSTATUS status;
2373         int fd;
2374
2375         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
2376         if (result == NULL) {
2377                 return NT_STATUS_NO_MEMORY;
2378         }
2379
2380         result->abstract_syntax = *abstract_syntax;
2381         result->transfer_syntax = ndr_transfer_syntax;
2382
2383         result->desthost = talloc_strdup(result, host);
2384         result->srv_name_slash = talloc_asprintf_strupper_m(
2385                 result, "\\\\%s", result->desthost);
2386         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2387                 status = NT_STATUS_NO_MEMORY;
2388                 goto fail;
2389         }
2390
2391         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2392         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2393
2394         if (!resolve_name(host, &addr, 0, false)) {
2395                 status = NT_STATUS_NOT_FOUND;
2396                 goto fail;
2397         }
2398
2399         status = open_socket_out(&addr, port, 60*1000, &fd);
2400         if (!NT_STATUS_IS_OK(status)) {
2401                 goto fail;
2402         }
2403         set_socket_options(fd, lp_socket_options());
2404
2405         status = rpc_transport_sock_init(result, fd, &result->transport);
2406         if (!NT_STATUS_IS_OK(status)) {
2407                 close(fd);
2408                 goto fail;
2409         }
2410
2411         result->transport->transport = NCACN_IP_TCP;
2412
2413         result->binding_handle = rpccli_bh_create(result);
2414         if (result->binding_handle == NULL) {
2415                 TALLOC_FREE(result);
2416                 return NT_STATUS_NO_MEMORY;
2417         }
2418
2419         *presult = result;
2420         return NT_STATUS_OK;
2421
2422  fail:
2423         TALLOC_FREE(result);
2424         return status;
2425 }
2426
2427 /**
2428  * Determine the tcp port on which a dcerpc interface is listening
2429  * for the ncacn_ip_tcp transport via the endpoint mapper of the
2430  * target host.
2431  */
2432 static NTSTATUS rpc_pipe_get_tcp_port(const char *host,
2433                                       const struct ndr_syntax_id *abstract_syntax,
2434                                       uint16_t *pport)
2435 {
2436         NTSTATUS status;
2437         struct rpc_pipe_client *epm_pipe = NULL;
2438         struct dcerpc_binding_handle *epm_handle = NULL;
2439         struct pipe_auth_data *auth = NULL;
2440         struct dcerpc_binding *map_binding = NULL;
2441         struct dcerpc_binding *res_binding = NULL;
2442         struct epm_twr_t *map_tower = NULL;
2443         struct epm_twr_t *res_towers = NULL;
2444         struct policy_handle *entry_handle = NULL;
2445         uint32_t num_towers = 0;
2446         uint32_t max_towers = 1;
2447         struct epm_twr_p_t towers;
2448         TALLOC_CTX *tmp_ctx = talloc_stackframe();
2449         uint32_t result = 0;
2450
2451         if (pport == NULL) {
2452                 status = NT_STATUS_INVALID_PARAMETER;
2453                 goto done;
2454         }
2455
2456         if (ndr_syntax_id_equal(abstract_syntax,
2457                                 &ndr_table_epmapper.syntax_id)) {
2458                 *pport = 135;
2459                 return NT_STATUS_OK;
2460         }
2461
2462         /* open the connection to the endpoint mapper */
2463         status = rpc_pipe_open_tcp_port(tmp_ctx, host, 135,
2464                                         &ndr_table_epmapper.syntax_id,
2465                                         &epm_pipe);
2466
2467         if (!NT_STATUS_IS_OK(status)) {
2468                 goto done;
2469         }
2470         epm_handle = epm_pipe->binding_handle;
2471
2472         status = rpccli_anon_bind_data(tmp_ctx, &auth);
2473         if (!NT_STATUS_IS_OK(status)) {
2474                 goto done;
2475         }
2476
2477         status = rpc_pipe_bind(epm_pipe, auth);
2478         if (!NT_STATUS_IS_OK(status)) {
2479                 goto done;
2480         }
2481
2482         /* create tower for asking the epmapper */
2483
2484         map_binding = talloc_zero(tmp_ctx, struct dcerpc_binding);
2485         if (map_binding == NULL) {
2486                 status = NT_STATUS_NO_MEMORY;
2487                 goto done;
2488         }
2489
2490         map_binding->transport = NCACN_IP_TCP;
2491         map_binding->object = *abstract_syntax;
2492         map_binding->host = host; /* needed? */
2493         map_binding->endpoint = "0"; /* correct? needed? */
2494
2495         map_tower = talloc_zero(tmp_ctx, struct epm_twr_t);
2496         if (map_tower == NULL) {
2497                 status = NT_STATUS_NO_MEMORY;
2498                 goto done;
2499         }
2500
2501         status = dcerpc_binding_build_tower(tmp_ctx, map_binding,
2502                                             &(map_tower->tower));
2503         if (!NT_STATUS_IS_OK(status)) {
2504                 goto done;
2505         }
2506
2507         /* allocate further parameters for the epm_Map call */
2508
2509         res_towers = talloc_array(tmp_ctx, struct epm_twr_t, max_towers);
2510         if (res_towers == NULL) {
2511                 status = NT_STATUS_NO_MEMORY;
2512                 goto done;
2513         }
2514         towers.twr = res_towers;
2515
2516         entry_handle = talloc_zero(tmp_ctx, struct policy_handle);
2517         if (entry_handle == NULL) {
2518                 status = NT_STATUS_NO_MEMORY;
2519                 goto done;
2520         }
2521
2522         /* ask the endpoint mapper for the port */
2523
2524         status = dcerpc_epm_Map(epm_handle,
2525                                 tmp_ctx,
2526                                 discard_const_p(struct GUID,
2527                                               &(abstract_syntax->uuid)),
2528                                 map_tower,
2529                                 entry_handle,
2530                                 max_towers,
2531                                 &num_towers,
2532                                 &towers,
2533                                 &result);
2534
2535         if (!NT_STATUS_IS_OK(status)) {
2536                 goto done;
2537         }
2538
2539         if (result != EPMAPPER_STATUS_OK) {
2540                 status = NT_STATUS_UNSUCCESSFUL;
2541                 goto done;
2542         }
2543
2544         if (num_towers != 1) {
2545                 status = NT_STATUS_UNSUCCESSFUL;
2546                 goto done;
2547         }
2548
2549         /* extract the port from the answer */
2550
2551         status = dcerpc_binding_from_tower(tmp_ctx,
2552                                            &(towers.twr->tower),
2553                                            &res_binding);
2554         if (!NT_STATUS_IS_OK(status)) {
2555                 goto done;
2556         }
2557
2558         /* are further checks here necessary? */
2559         if (res_binding->transport != NCACN_IP_TCP) {
2560                 status = NT_STATUS_UNSUCCESSFUL;
2561                 goto done;
2562         }
2563
2564         *pport = (uint16_t)atoi(res_binding->endpoint);
2565
2566 done:
2567         TALLOC_FREE(tmp_ctx);
2568         return status;
2569 }
2570
2571 /**
2572  * Create a rpc pipe client struct, connecting to a host via tcp.
2573  * The port is determined by asking the endpoint mapper on the given
2574  * host.
2575  */
2576 NTSTATUS rpc_pipe_open_tcp(TALLOC_CTX *mem_ctx, const char *host,
2577                            const struct ndr_syntax_id *abstract_syntax,
2578                            struct rpc_pipe_client **presult)
2579 {
2580         NTSTATUS status;
2581         uint16_t port = 0;
2582
2583         status = rpc_pipe_get_tcp_port(host, abstract_syntax, &port);
2584         if (!NT_STATUS_IS_OK(status)) {
2585                 return status;
2586         }
2587
2588         return rpc_pipe_open_tcp_port(mem_ctx, host, port,
2589                                         abstract_syntax, presult);
2590 }
2591
2592 /********************************************************************
2593  Create a rpc pipe client struct, connecting to a unix domain socket
2594  ********************************************************************/
2595 NTSTATUS rpc_pipe_open_ncalrpc(TALLOC_CTX *mem_ctx, const char *socket_path,
2596                                const struct ndr_syntax_id *abstract_syntax,
2597                                struct rpc_pipe_client **presult)
2598 {
2599         struct rpc_pipe_client *result;
2600         struct sockaddr_un addr;
2601         NTSTATUS status;
2602         int fd;
2603
2604         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
2605         if (result == NULL) {
2606                 return NT_STATUS_NO_MEMORY;
2607         }
2608
2609         result->abstract_syntax = *abstract_syntax;
2610         result->transfer_syntax = ndr_transfer_syntax;
2611
2612         result->desthost = get_myname(result);
2613         result->srv_name_slash = talloc_asprintf_strupper_m(
2614                 result, "\\\\%s", result->desthost);
2615         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2616                 status = NT_STATUS_NO_MEMORY;
2617                 goto fail;
2618         }
2619
2620         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2621         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2622
2623         fd = socket(AF_UNIX, SOCK_STREAM, 0);
2624         if (fd == -1) {
2625                 status = map_nt_error_from_unix(errno);
2626                 goto fail;
2627         }
2628
2629         ZERO_STRUCT(addr);
2630         addr.sun_family = AF_UNIX;
2631         strlcpy(addr.sun_path, socket_path, sizeof(addr.sun_path));
2632
2633         if (sys_connect(fd, (struct sockaddr *)(void *)&addr) == -1) {
2634                 DEBUG(0, ("connect(%s) failed: %s\n", socket_path,
2635                           strerror(errno)));
2636                 close(fd);
2637                 return map_nt_error_from_unix(errno);
2638         }
2639
2640         status = rpc_transport_sock_init(result, fd, &result->transport);
2641         if (!NT_STATUS_IS_OK(status)) {
2642                 close(fd);
2643                 goto fail;
2644         }
2645
2646         result->transport->transport = NCALRPC;
2647
2648         result->binding_handle = rpccli_bh_create(result);
2649         if (result->binding_handle == NULL) {
2650                 TALLOC_FREE(result);
2651                 return NT_STATUS_NO_MEMORY;
2652         }
2653
2654         *presult = result;
2655         return NT_STATUS_OK;
2656
2657  fail:
2658         TALLOC_FREE(result);
2659         return status;
2660 }
2661
2662 struct rpc_pipe_client_np_ref {
2663         struct cli_state *cli;
2664         struct rpc_pipe_client *pipe;
2665 };
2666
2667 static int rpc_pipe_client_np_ref_destructor(struct rpc_pipe_client_np_ref *np_ref)
2668 {
2669         DLIST_REMOVE(np_ref->cli->pipe_list, np_ref->pipe);
2670         return 0;
2671 }
2672
2673 /****************************************************************************
2674  Open a named pipe over SMB to a remote server.
2675  *
2676  * CAVEAT CALLER OF THIS FUNCTION:
2677  *    The returned rpc_pipe_client saves a copy of the cli_state cli pointer,
2678  *    so be sure that this function is called AFTER any structure (vs pointer)
2679  *    assignment of the cli.  In particular, libsmbclient does structure
2680  *    assignments of cli, which invalidates the data in the returned
2681  *    rpc_pipe_client if this function is called before the structure assignment
2682  *    of cli.
2683  *
2684  ****************************************************************************/
2685
2686 static NTSTATUS rpc_pipe_open_np(struct cli_state *cli,
2687                                  const struct ndr_syntax_id *abstract_syntax,
2688                                  struct rpc_pipe_client **presult)
2689 {
2690         struct rpc_pipe_client *result;
2691         NTSTATUS status;
2692         struct rpc_pipe_client_np_ref *np_ref;
2693
2694         /* sanity check to protect against crashes */
2695
2696         if ( !cli ) {
2697                 return NT_STATUS_INVALID_HANDLE;
2698         }
2699
2700         result = talloc_zero(NULL, struct rpc_pipe_client);
2701         if (result == NULL) {
2702                 return NT_STATUS_NO_MEMORY;
2703         }
2704
2705         result->abstract_syntax = *abstract_syntax;
2706         result->transfer_syntax = ndr_transfer_syntax;
2707         result->desthost = talloc_strdup(result, cli_state_remote_name(cli));
2708         result->srv_name_slash = talloc_asprintf_strupper_m(
2709                 result, "\\\\%s", result->desthost);
2710
2711         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2712         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2713
2714         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2715                 TALLOC_FREE(result);
2716                 return NT_STATUS_NO_MEMORY;
2717         }
2718
2719         status = rpc_transport_np_init(result, cli, abstract_syntax,
2720                                        &result->transport);
2721         if (!NT_STATUS_IS_OK(status)) {
2722                 TALLOC_FREE(result);
2723                 return status;
2724         }
2725
2726         result->transport->transport = NCACN_NP;
2727
2728         np_ref = talloc(result->transport, struct rpc_pipe_client_np_ref);
2729         if (np_ref == NULL) {
2730                 TALLOC_FREE(result);
2731                 return NT_STATUS_NO_MEMORY;
2732         }
2733         np_ref->cli = cli;
2734         np_ref->pipe = result;
2735
2736         DLIST_ADD(np_ref->cli->pipe_list, np_ref->pipe);
2737         talloc_set_destructor(np_ref, rpc_pipe_client_np_ref_destructor);
2738
2739         result->binding_handle = rpccli_bh_create(result);
2740         if (result->binding_handle == NULL) {
2741                 TALLOC_FREE(result);
2742                 return NT_STATUS_NO_MEMORY;
2743         }
2744
2745         *presult = result;
2746         return NT_STATUS_OK;
2747 }
2748
2749 /****************************************************************************
2750  Open a pipe to a remote server.
2751  ****************************************************************************/
2752
2753 static NTSTATUS cli_rpc_pipe_open(struct cli_state *cli,
2754                                   enum dcerpc_transport_t transport,
2755                                   const struct ndr_syntax_id *interface,
2756                                   struct rpc_pipe_client **presult)
2757 {
2758         switch (transport) {
2759         case NCACN_IP_TCP:
2760                 return rpc_pipe_open_tcp(NULL, cli_state_remote_name(cli),
2761                                          interface, presult);
2762         case NCACN_NP:
2763                 return rpc_pipe_open_np(cli, interface, presult);
2764         default:
2765                 return NT_STATUS_NOT_IMPLEMENTED;
2766         }
2767 }
2768
2769 /****************************************************************************
2770  Open a named pipe to an SMB server and bind anonymously.
2771  ****************************************************************************/
2772
2773 NTSTATUS cli_rpc_pipe_open_noauth_transport(struct cli_state *cli,
2774                                             enum dcerpc_transport_t transport,
2775                                             const struct ndr_syntax_id *interface,
2776                                             struct rpc_pipe_client **presult)
2777 {
2778         struct rpc_pipe_client *result;
2779         struct pipe_auth_data *auth;
2780         NTSTATUS status;
2781
2782         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2783         if (!NT_STATUS_IS_OK(status)) {
2784                 return status;
2785         }
2786
2787         status = rpccli_anon_bind_data(result, &auth);
2788         if (!NT_STATUS_IS_OK(status)) {
2789                 DEBUG(0, ("rpccli_anon_bind_data returned %s\n",
2790                           nt_errstr(status)));
2791                 TALLOC_FREE(result);
2792                 return status;
2793         }
2794
2795         /*
2796          * This is a bit of an abstraction violation due to the fact that an
2797          * anonymous bind on an authenticated SMB inherits the user/domain
2798          * from the enclosing SMB creds
2799          */
2800
2801         TALLOC_FREE(auth->user_name);
2802         TALLOC_FREE(auth->domain);
2803
2804         auth->user_name = talloc_strdup(auth, cli->user_name);
2805         auth->domain = talloc_strdup(auth, cli->domain);
2806         auth->user_session_key = data_blob_talloc(auth,
2807                 cli->user_session_key.data,
2808                 cli->user_session_key.length);
2809
2810         if ((auth->user_name == NULL) || (auth->domain == NULL)) {
2811                 TALLOC_FREE(result);
2812                 return NT_STATUS_NO_MEMORY;
2813         }
2814
2815         status = rpc_pipe_bind(result, auth);
2816         if (!NT_STATUS_IS_OK(status)) {
2817                 int lvl = 0;
2818                 if (ndr_syntax_id_equal(interface,
2819                                         &ndr_table_dssetup.syntax_id)) {
2820                         /* non AD domains just don't have this pipe, avoid
2821                          * level 0 statement in that case - gd */
2822                         lvl = 3;
2823                 }
2824                 DEBUG(lvl, ("cli_rpc_pipe_open_noauth: rpc_pipe_bind for pipe "
2825                             "%s failed with error %s\n",
2826                             get_pipe_name_from_syntax(talloc_tos(), interface),
2827                             nt_errstr(status) ));
2828                 TALLOC_FREE(result);
2829                 return status;
2830         }
2831
2832         DEBUG(10,("cli_rpc_pipe_open_noauth: opened pipe %s to machine "
2833                   "%s and bound anonymously.\n",
2834                   get_pipe_name_from_syntax(talloc_tos(), interface),
2835                   result->desthost));
2836
2837         *presult = result;
2838         return NT_STATUS_OK;
2839 }
2840
2841 /****************************************************************************
2842  ****************************************************************************/
2843
2844 NTSTATUS cli_rpc_pipe_open_noauth(struct cli_state *cli,
2845                                   const struct ndr_syntax_id *interface,
2846                                   struct rpc_pipe_client **presult)
2847 {
2848         return cli_rpc_pipe_open_noauth_transport(cli, NCACN_NP,
2849                                                   interface, presult);
2850 }
2851
2852 /****************************************************************************
2853  Open a named pipe to an SMB server and bind using NTLMSSP or SPNEGO NTLMSSP
2854  ****************************************************************************/
2855
2856 NTSTATUS cli_rpc_pipe_open_ntlmssp(struct cli_state *cli,
2857                                    const struct ndr_syntax_id *interface,
2858                                    enum dcerpc_transport_t transport,
2859                                    enum dcerpc_AuthLevel auth_level,
2860                                    const char *domain,
2861                                    const char *username,
2862                                    const char *password,
2863                                    struct rpc_pipe_client **presult)
2864 {
2865         struct rpc_pipe_client *result;
2866         struct pipe_auth_data *auth = NULL;
2867         enum dcerpc_AuthType auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
2868         NTSTATUS status;
2869
2870         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2871         if (!NT_STATUS_IS_OK(status)) {
2872                 return status;
2873         }
2874
2875         status = rpccli_ntlmssp_bind_data(result,
2876                                           auth_type, auth_level,
2877                                           domain, username, password,
2878                                           &auth);
2879         if (!NT_STATUS_IS_OK(status)) {
2880                 DEBUG(0, ("rpccli_ntlmssp_bind_data returned %s\n",
2881                           nt_errstr(status)));
2882                 goto err;
2883         }
2884
2885         status = rpc_pipe_bind(result, auth);
2886         if (!NT_STATUS_IS_OK(status)) {
2887                 DEBUG(0, ("cli_rpc_pipe_open_ntlmssp_internal: cli_rpc_pipe_bind failed with error %s\n",
2888                         nt_errstr(status) ));
2889                 goto err;
2890         }
2891
2892         DEBUG(10,("cli_rpc_pipe_open_ntlmssp_internal: opened pipe %s to "
2893                 "machine %s and bound NTLMSSP as user %s\\%s.\n",
2894                   get_pipe_name_from_syntax(talloc_tos(), interface),
2895                   result->desthost, domain, username));
2896
2897         *presult = result;
2898         return NT_STATUS_OK;
2899
2900   err:
2901
2902         TALLOC_FREE(result);
2903         return status;
2904 }
2905
2906 /****************************************************************************
2907  External interface.
2908  Open a named pipe to an SMB server and bind using schannel (bind type 68)
2909  using session_key. sign and seal.
2910
2911  The *pdc will be stolen onto this new pipe
2912  ****************************************************************************/
2913
2914 NTSTATUS cli_rpc_pipe_open_schannel_with_key(struct cli_state *cli,
2915                                              const struct ndr_syntax_id *interface,
2916                                              enum dcerpc_transport_t transport,
2917                                              enum dcerpc_AuthLevel auth_level,
2918                                              const char *domain,
2919                                              struct netlogon_creds_CredentialState **pdc,
2920                                              struct rpc_pipe_client **presult)
2921 {
2922         struct rpc_pipe_client *result;
2923         struct pipe_auth_data *auth;
2924         NTSTATUS status;
2925
2926         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2927         if (!NT_STATUS_IS_OK(status)) {
2928                 return status;
2929         }
2930
2931         status = rpccli_schannel_bind_data(result, domain, auth_level,
2932                                            *pdc, &auth);
2933         if (!NT_STATUS_IS_OK(status)) {
2934                 DEBUG(0, ("rpccli_schannel_bind_data returned %s\n",
2935                           nt_errstr(status)));
2936                 TALLOC_FREE(result);
2937                 return status;
2938         }
2939
2940         status = rpc_pipe_bind(result, auth);
2941         if (!NT_STATUS_IS_OK(status)) {
2942                 DEBUG(0, ("cli_rpc_pipe_open_schannel_with_key: "
2943                           "cli_rpc_pipe_bind failed with error %s\n",
2944                           nt_errstr(status) ));
2945                 TALLOC_FREE(result);
2946                 return status;
2947         }
2948
2949         /*
2950          * The credentials on a new netlogon pipe are the ones we are passed
2951          * in - copy them over
2952          */
2953         result->dc = netlogon_creds_copy(result, *pdc);
2954         if (result->dc == NULL) {
2955                 TALLOC_FREE(result);
2956                 return NT_STATUS_NO_MEMORY;
2957         }
2958
2959         DEBUG(10,("cli_rpc_pipe_open_schannel_with_key: opened pipe %s to machine %s "
2960                   "for domain %s and bound using schannel.\n",
2961                   get_pipe_name_from_syntax(talloc_tos(), interface),
2962                   result->desthost, domain));
2963
2964         *presult = result;
2965         return NT_STATUS_OK;
2966 }
2967
2968 /****************************************************************************
2969  Open a named pipe to an SMB server and bind using krb5 (bind type 16).
2970  The idea is this can be called with service_princ, username and password all
2971  NULL so long as the caller has a TGT.
2972  ****************************************************************************/
2973
2974 NTSTATUS cli_rpc_pipe_open_krb5(struct cli_state *cli,
2975                                 const struct ndr_syntax_id *interface,
2976                                 enum dcerpc_transport_t transport,
2977                                 enum dcerpc_AuthLevel auth_level,
2978                                 const char *server,
2979                                 const char *username,
2980                                 const char *password,
2981                                 struct rpc_pipe_client **presult)
2982 {
2983         struct rpc_pipe_client *result;
2984         struct pipe_auth_data *auth;
2985         struct gse_context *gse_ctx;
2986         NTSTATUS status;
2987
2988         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2989         if (!NT_STATUS_IS_OK(status)) {
2990                 return status;
2991         }
2992
2993         auth = talloc(result, struct pipe_auth_data);
2994         if (auth == NULL) {
2995                 status = NT_STATUS_NO_MEMORY;
2996                 goto err_out;
2997         }
2998         auth->auth_type = DCERPC_AUTH_TYPE_KRB5;
2999         auth->auth_level = auth_level;
3000
3001         if (!username) {
3002                 username = "";
3003         }
3004         auth->user_name = talloc_strdup(auth, username);
3005         if (!auth->user_name) {
3006                 status = NT_STATUS_NO_MEMORY;
3007                 goto err_out;
3008         }
3009
3010         /* Fixme, should we fetch/set the Realm ? */
3011         auth->domain = talloc_strdup(auth, "");
3012         if (!auth->domain) {
3013                 status = NT_STATUS_NO_MEMORY;
3014                 goto err_out;
3015         }
3016
3017         status = gse_init_client(auth,
3018                                  (auth_level == DCERPC_AUTH_LEVEL_INTEGRITY),
3019                                  (auth_level == DCERPC_AUTH_LEVEL_PRIVACY),
3020                                  NULL, server, "cifs", username, password,
3021                                  GSS_C_DCE_STYLE, &gse_ctx);
3022         if (!NT_STATUS_IS_OK(status)) {
3023                 DEBUG(0, ("gse_init_client returned %s\n",
3024                           nt_errstr(status)));
3025                 goto err_out;
3026         }
3027         auth->auth_ctx = gse_ctx;
3028
3029         status = rpc_pipe_bind(result, auth);
3030         if (!NT_STATUS_IS_OK(status)) {
3031                 DEBUG(0, ("cli_rpc_pipe_bind failed with error %s\n",
3032                           nt_errstr(status)));
3033                 goto err_out;
3034         }
3035
3036         *presult = result;
3037         return NT_STATUS_OK;
3038
3039 err_out:
3040         TALLOC_FREE(result);
3041         return status;
3042 }
3043
3044 NTSTATUS cli_rpc_pipe_open_spnego_krb5(struct cli_state *cli,
3045                                         const struct ndr_syntax_id *interface,
3046                                         enum dcerpc_transport_t transport,
3047                                         enum dcerpc_AuthLevel auth_level,
3048                                         const char *server,
3049                                         const char *username,
3050                                         const char *password,
3051                                         struct rpc_pipe_client **presult)
3052 {
3053         struct rpc_pipe_client *result;
3054         struct pipe_auth_data *auth;
3055         struct spnego_context *spnego_ctx;
3056         NTSTATUS status;
3057
3058         status = cli_rpc_pipe_open(cli, transport, interface, &result);
3059         if (!NT_STATUS_IS_OK(status)) {
3060                 return status;
3061         }
3062
3063         auth = talloc(result, struct pipe_auth_data);
3064         if (auth == NULL) {
3065                 status = NT_STATUS_NO_MEMORY;
3066                 goto err_out;
3067         }
3068         auth->auth_type = DCERPC_AUTH_TYPE_SPNEGO;
3069         auth->auth_level = auth_level;
3070
3071         if (!username) {
3072                 username = "";
3073         }
3074         auth->user_name = talloc_strdup(auth, username);
3075         if (!auth->user_name) {
3076                 status = NT_STATUS_NO_MEMORY;
3077                 goto err_out;
3078         }
3079
3080         /* Fixme, should we fetch/set the Realm ? */
3081         auth->domain = talloc_strdup(auth, "");
3082         if (!auth->domain) {
3083                 status = NT_STATUS_NO_MEMORY;
3084                 goto err_out;
3085         }
3086
3087         status = spnego_gssapi_init_client(auth,
3088                                            (auth->auth_level ==
3089                                                 DCERPC_AUTH_LEVEL_INTEGRITY),
3090                                            (auth->auth_level ==
3091                                                 DCERPC_AUTH_LEVEL_PRIVACY),
3092                                            true,
3093                                            NULL, server, "cifs",
3094                                            username, password,
3095                                            &spnego_ctx);
3096         if (!NT_STATUS_IS_OK(status)) {
3097                 DEBUG(0, ("spnego_init_client returned %s\n",
3098                           nt_errstr(status)));
3099                 goto err_out;
3100         }
3101         auth->auth_ctx = spnego_ctx;
3102
3103         status = rpc_pipe_bind(result, auth);
3104         if (!NT_STATUS_IS_OK(status)) {
3105                 DEBUG(0, ("cli_rpc_pipe_bind failed with error %s\n",
3106                           nt_errstr(status)));
3107                 goto err_out;
3108         }
3109
3110         *presult = result;
3111         return NT_STATUS_OK;
3112
3113 err_out:
3114         TALLOC_FREE(result);
3115         return status;
3116 }
3117
3118 NTSTATUS cli_rpc_pipe_open_spnego_ntlmssp(struct cli_state *cli,
3119                                           const struct ndr_syntax_id *interface,
3120                                           enum dcerpc_transport_t transport,
3121                                           enum dcerpc_AuthLevel auth_level,
3122                                           const char *domain,
3123                                           const char *username,
3124                                           const char *password,
3125                                           struct rpc_pipe_client **presult)
3126 {
3127         struct rpc_pipe_client *result;
3128         struct pipe_auth_data *auth;
3129         struct spnego_context *spnego_ctx;
3130         NTSTATUS status;
3131
3132         status = cli_rpc_pipe_open(cli, transport, interface, &result);
3133         if (!NT_STATUS_IS_OK(status)) {
3134                 return status;
3135         }
3136
3137         auth = talloc(result, struct pipe_auth_data);
3138         if (auth == NULL) {
3139                 status = NT_STATUS_NO_MEMORY;
3140                 goto err_out;
3141         }
3142         auth->auth_type = DCERPC_AUTH_TYPE_SPNEGO;
3143         auth->auth_level = auth_level;
3144
3145         if (!username) {
3146                 username = "";
3147         }
3148         auth->user_name = talloc_strdup(auth, username);
3149         if (!auth->user_name) {
3150                 status = NT_STATUS_NO_MEMORY;
3151                 goto err_out;
3152         }
3153
3154         if (!domain) {
3155                 domain = "";
3156         }
3157         auth->domain = talloc_strdup(auth, domain);
3158         if (!auth->domain) {
3159                 status = NT_STATUS_NO_MEMORY;
3160                 goto err_out;
3161         }
3162
3163         status = spnego_ntlmssp_init_client(auth,
3164                                             (auth->auth_level ==
3165                                                 DCERPC_AUTH_LEVEL_INTEGRITY),
3166                                             (auth->auth_level ==
3167                                                 DCERPC_AUTH_LEVEL_PRIVACY),
3168                                             true,
3169                                             domain, username, password,
3170                                             &spnego_ctx);
3171         if (!NT_STATUS_IS_OK(status)) {
3172                 DEBUG(0, ("spnego_init_client returned %s\n",
3173                           nt_errstr(status)));
3174                 goto err_out;
3175         }
3176         auth->auth_ctx = spnego_ctx;
3177
3178         status = rpc_pipe_bind(result, auth);
3179         if (!NT_STATUS_IS_OK(status)) {
3180                 DEBUG(0, ("cli_rpc_pipe_bind failed with error %s\n",
3181                           nt_errstr(status)));
3182                 goto err_out;
3183         }
3184
3185         *presult = result;
3186         return NT_STATUS_OK;
3187
3188 err_out:
3189         TALLOC_FREE(result);
3190         return status;
3191 }
3192
3193 NTSTATUS cli_get_session_key(TALLOC_CTX *mem_ctx,
3194                              struct rpc_pipe_client *cli,
3195                              DATA_BLOB *session_key)
3196 {
3197         NTSTATUS status;
3198         struct pipe_auth_data *a;
3199         struct schannel_state *schannel_auth;
3200         struct gensec_security *gensec_security;
3201         struct spnego_context *spnego_ctx;
3202         struct gse_context *gse_ctx;
3203         DATA_BLOB sk = data_blob_null;
3204         bool make_dup = false;
3205
3206         if (!session_key || !cli) {
3207                 return NT_STATUS_INVALID_PARAMETER;
3208         }
3209
3210         a = cli->auth;
3211
3212         if (a == NULL) {
3213                 return NT_STATUS_INVALID_PARAMETER;
3214         }
3215
3216         switch (cli->auth->auth_type) {
3217         case DCERPC_AUTH_TYPE_SCHANNEL:
3218                 schannel_auth = talloc_get_type_abort(a->auth_ctx,
3219                                                       struct schannel_state);
3220                 sk = data_blob_const(schannel_auth->creds->session_key, 16);
3221                 make_dup = true;
3222                 break;
3223         case DCERPC_AUTH_TYPE_SPNEGO:
3224                 spnego_ctx = talloc_get_type_abort(a->auth_ctx,
3225                                                    struct spnego_context);
3226                 sk = spnego_get_session_key(mem_ctx, spnego_ctx);
3227                 make_dup = false;
3228                 break;
3229         case DCERPC_AUTH_TYPE_NTLMSSP:
3230                 gensec_security = talloc_get_type_abort(a->auth_ctx,
3231                                                 struct gensec_security);
3232                 status = gensec_session_key(gensec_security, mem_ctx, &sk);
3233                 if (!NT_STATUS_IS_OK(status)) {
3234                         return status;
3235                 }
3236                 make_dup = false;
3237                 break;
3238         case DCERPC_AUTH_TYPE_KRB5:
3239                 gse_ctx = talloc_get_type_abort(a->auth_ctx,
3240                                                 struct gse_context);
3241                 sk = gse_get_session_key(mem_ctx, gse_ctx);
3242                 make_dup = false;
3243                 break;
3244         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
3245         case DCERPC_AUTH_TYPE_NONE:
3246                 sk = data_blob_const(a->user_session_key.data,
3247                                      a->user_session_key.length);
3248                 make_dup = true;
3249                 break;
3250         default:
3251                 break;
3252         }
3253
3254         if (!sk.data) {
3255                 return NT_STATUS_NO_USER_SESSION_KEY;
3256         }
3257
3258         if (make_dup) {
3259                 *session_key = data_blob_dup_talloc(mem_ctx, sk);
3260         } else {
3261                 *session_key = sk;
3262         }
3263
3264         return NT_STATUS_OK;
3265 }