auth/ntlmssp/ntlmssp_client.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    handle NLTMSSP, client server side parsing
   5
   6    Copyright (C) Andrew Tridgell      2001
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
   8    Copyright (C) Stefan Metzmacher 2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 struct auth_session_info;
  25
  26 #include "includes.h"
  27 #include "auth/ntlmssp/ntlmssp.h"
  28 #include "../lib/crypto/crypto.h"
  29 #include "../libcli/auth/libcli_auth.h"
  30 #include "auth/credentials/credentials.h"
  31 #include "auth/gensec/gensec.h"
  32 #include "auth/gensec/gensec_internal.h"
  33 #include "param/param.h"
  34 #include "auth/ntlmssp/ntlmssp_private.h"
  35 #include "../librpc/gen_ndr/ndr_ntlmssp.h"
  36 #include "../auth/ntlmssp/ntlmssp_ndr.h"
  37 #include "../nsswitch/libwbclient/wbclient.h"
  38
  39 /*********************************************************************
  40  Client side NTLMSSP
  41 *********************************************************************/
  42
  43 /**
  44  * Next state function for the Initial packet
  45  *
  46  * @param ntlmssp_state NTLMSSP State
  47  * @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
  48  * @param in A NULL data blob (input ignored)
  49  * @param out The initial negotiate request to the server, as an talloc()ed DATA_BLOB, on out_mem_ctx
  50  * @return Errors or NT_STATUS_OK.
  51  */
  52
  53 NTSTATUS ntlmssp_client_initial(struct gensec_security *gensec_security,
  54                                 TALLOC_CTX *out_mem_ctx,
  55                                 DATA_BLOB in, DATA_BLOB *out)
  56 {
  57         struct gensec_ntlmssp_context *gensec_ntlmssp =
  58                 talloc_get_type_abort(gensec_security->private_data,
  59                                       struct gensec_ntlmssp_context);
  60         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
  61         NTSTATUS status;
  62         const DATA_BLOB version_blob = ntlmssp_version_blob();
  63
  64         /* generate the ntlmssp negotiate packet */
  65         status = msrpc_gen(out_mem_ctx,
  66                   out, "CddAAb",
  67                   "NTLMSSP",
  68                   NTLMSSP_NEGOTIATE,
  69                   ntlmssp_state->neg_flags,
  70                   "", /* domain */
  71                   "", /* workstation */
  72                   version_blob.data, version_blob.length);
  73         if (!NT_STATUS_IS_OK(status)) {
  74                 DEBUG(0, ("ntlmssp_client_initial: failed to generate "
  75                           "ntlmssp negotiate packet\n"));
  76                 return status;
  77         }
  78
  79         if (DEBUGLEVEL >= 10) {
  80                 struct NEGOTIATE_MESSAGE *negotiate = talloc(
  81                         ntlmssp_state, struct NEGOTIATE_MESSAGE);
  82                 if (negotiate != NULL) {
  83                         status = ntlmssp_pull_NEGOTIATE_MESSAGE(
  84                                 out, negotiate, negotiate);
  85                         if (NT_STATUS_IS_OK(status)) {
  86                                 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
  87                                                 negotiate);
  88                         }
  89                         TALLOC_FREE(negotiate);
  90                 }
  91         }
  92
  93         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
  94
  95         return NT_STATUS_MORE_PROCESSING_REQUIRED;
  96 }
  97
  98 NTSTATUS gensec_ntlmssp_resume_ccache(struct gensec_security *gensec_security,
  99                                 TALLOC_CTX *out_mem_ctx,
 100                                 DATA_BLOB in, DATA_BLOB *out)
 101 {
 102         struct gensec_ntlmssp_context *gensec_ntlmssp =
 103                 talloc_get_type_abort(gensec_security->private_data,
 104                                       struct gensec_ntlmssp_context);
 105         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 106         uint32_t neg_flags = 0;
 107         uint32_t ntlmssp_command;
 108         NTSTATUS status;
 109         bool ok;
 110
 111         *out = data_blob_null;
 112
 113         if (in.length == 0) {
 114                 /*
 115                  * This is compat code for older callers
 116                  * which were missing the "initial_blob"
 117                  */
 118                 ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 119                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 120         }
 121
 122         /* parse the NTLMSSP packet */
 123
 124         if (in.length > UINT16_MAX) {
 125                 DEBUG(1, ("%s: reject large request of length %u\n",
 126                         __func__, (unsigned int)in.length));
 127                 return NT_STATUS_INVALID_PARAMETER;
 128         }
 129
 130         ok = msrpc_parse(ntlmssp_state, &in, "Cdd",
 131                          "NTLMSSP",
 132                          &ntlmssp_command,
 133                          &neg_flags);
 134         if (!ok) {
 135                 DEBUG(1, ("%s: failed to parse NTLMSSP Negotiate of length %u\n",
 136                         __func__, (unsigned int)in.length));
 137                 dump_data(2, in.data, in.length);
 138                 return NT_STATUS_INVALID_PARAMETER;
 139         }
 140
 141         if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
 142                 DEBUG(1, ("%s: no NTLMSSP Negotiate message (length %u)\n",
 143                         __func__, (unsigned int)in.length));
 144                 dump_data(2, in.data, in.length);
 145                 return NT_STATUS_INVALID_PARAMETER;
 146         }
 147
 148         ntlmssp_state->neg_flags = neg_flags;
 149         DEBUG(3, ("Imported Negotiate flags:\n"));
 150         debug_ntlmssp_flags(neg_flags);
 151
 152         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
 153                 ntlmssp_state->unicode = true;
 154         } else {
 155                 ntlmssp_state->unicode = false;
 156         }
 157
 158         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
 159                 gensec_security->want_features |= GENSEC_FEATURE_SIGN;
 160
 161                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 162         }
 163
 164         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
 165                 gensec_security->want_features |= GENSEC_FEATURE_SEAL;
 166
 167                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 168                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
 169         }
 170
 171         if (DEBUGLEVEL >= 10) {
 172                 struct NEGOTIATE_MESSAGE *negotiate = talloc(
 173                         ntlmssp_state, struct NEGOTIATE_MESSAGE);
 174                 if (negotiate != NULL) {
 175                         status = ntlmssp_pull_NEGOTIATE_MESSAGE(
 176                                 &in, negotiate, negotiate);
 177                         if (NT_STATUS_IS_OK(status)) {
 178                                 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
 179                                                 negotiate);
 180                         }
 181                         TALLOC_FREE(negotiate);
 182                 }
 183         }
 184
 185         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 186
 187         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 188 }
 189
 190 /**
 191  * Next state function for the Challenge Packet.  Generate an auth packet.
 192  *
 193  * @param gensec_security GENSEC state
 194  * @param out_mem_ctx Memory context for *out
 195  * @param in The server challnege, as a DATA_BLOB.  reply.data must be NULL
 196  * @param out The next request (auth packet) to the server, as an allocated DATA_BLOB, on the out_mem_ctx context
 197  * @return Errors or NT_STATUS_OK.
 198  */
 199
 200 NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security,
 201                                   TALLOC_CTX *out_mem_ctx,
 202                                   const DATA_BLOB in, DATA_BLOB *out)
 203 {
 204         struct gensec_ntlmssp_context *gensec_ntlmssp =
 205                 talloc_get_type_abort(gensec_security->private_data,
 206                                       struct gensec_ntlmssp_context);
 207         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 208         uint32_t chal_flags, ntlmssp_command, unkn1 = 0, unkn2 = 0;
 209         DATA_BLOB server_domain_blob;
 210         DATA_BLOB challenge_blob;
 211         DATA_BLOB target_info = data_blob(NULL, 0);
 212         char *server_domain;
 213         const char *chal_parse_string;
 214         const char *chal_parse_string_short = NULL;
 215         const char *auth_gen_string;
 216         DATA_BLOB lm_response = data_blob(NULL, 0);
 217         DATA_BLOB nt_response = data_blob(NULL, 0);
 218         DATA_BLOB session_key = data_blob(NULL, 0);
 219         DATA_BLOB lm_session_key = data_blob(NULL, 0);
 220         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 221         NTSTATUS nt_status;
 222         int flags = 0;
 223         const char *user = NULL, *domain = NULL, *workstation = NULL;
 224         bool is_anonymous = false;
 225         const DATA_BLOB version_blob = ntlmssp_version_blob();
 226
 227         TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
 228         if (!mem_ctx) {
 229                 return NT_STATUS_NO_MEMORY;
 230         }
 231
 232         if (!msrpc_parse(mem_ctx,
 233                          &in, "CdBd",
 234                          "NTLMSSP",
 235                          &ntlmssp_command,
 236                          &server_domain_blob,
 237                          &chal_flags)) {
 238                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
 239                 dump_data(2, in.data, in.length);
 240                 talloc_free(mem_ctx);
 241
 242                 return NT_STATUS_INVALID_PARAMETER;
 243         }
 244
 245         data_blob_free(&server_domain_blob);
 246
 247         DEBUG(3, ("Got challenge flags:\n"));
 248         debug_ntlmssp_flags(chal_flags);
 249
 250         nt_status = ntlmssp_handle_neg_flags(ntlmssp_state,
 251                                              chal_flags, "challenge");
 252         if (!NT_STATUS_IS_OK(nt_status)) {
 253                 return nt_status;
 254         }
 255
 256         if (ntlmssp_state->unicode) {
 257                 if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
 258                         chal_parse_string = "CdUdbddB";
 259                 } else {
 260                         chal_parse_string = "CdUdbdd";
 261                         chal_parse_string_short = "CdUdb";
 262                 }
 263                 auth_gen_string = "CdBBUUUBdb";
 264         } else {
 265                 if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
 266                         chal_parse_string = "CdAdbddB";
 267                 } else {
 268                         chal_parse_string = "CdAdbdd";
 269                         chal_parse_string_short = "CdAdb";
 270                 }
 271
 272                 auth_gen_string = "CdBBAAABdb";
 273         }
 274
 275         if (!msrpc_parse(mem_ctx,
 276                          &in, chal_parse_string,
 277                          "NTLMSSP",
 278                          &ntlmssp_command,
 279                          &server_domain,
 280                          &chal_flags,
 281                          &challenge_blob, 8,
 282                          &unkn1, &unkn2,
 283                          &target_info)) {
 284
 285                 bool ok = false;
 286
 287                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
 288
 289                 if (chal_parse_string_short != NULL) {
 290                         /*
 291                          * In the case where NTLMSSP_NEGOTIATE_TARGET_INFO
 292                          * is not used, some NTLMSSP servers don't return
 293                          * the unused unkn1 and unkn2 fields.
 294                          * See bug:
 295                          * https://bugzilla.samba.org/show_bug.cgi?id=10016
 296                          * for packet traces.
 297                          * Try and parse again without them.
 298                          */
 299                         ok = msrpc_parse(mem_ctx,
 300                                 &in, chal_parse_string_short,
 301                                 "NTLMSSP",
 302                                 &ntlmssp_command,
 303                                 &server_domain,
 304                                 &chal_flags,
 305                                 &challenge_blob, 8);
 306                         if (!ok) {
 307                                 DEBUG(1, ("Failed to short parse "
 308                                         "the NTLMSSP Challenge: (#2)\n"));
 309                         }
 310                 }
 311
 312                 if (!ok) {
 313                         dump_data(2, in.data, in.length);
 314                         talloc_free(mem_ctx);
 315                         return NT_STATUS_INVALID_PARAMETER;
 316                 }
 317         }
 318
 319         if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) {
 320                 ntlmssp_state->server.is_standalone = true;
 321         } else {
 322                 ntlmssp_state->server.is_standalone = false;
 323         }
 324         /* TODO: parse struct_blob and fill in the rest */
 325         ntlmssp_state->server.netbios_name = "";
 326         ntlmssp_state->server.netbios_domain = talloc_move(ntlmssp_state, &server_domain);
 327         ntlmssp_state->server.dns_name = "";
 328         ntlmssp_state->server.dns_domain = "";
 329
 330         if (challenge_blob.length != 8) {
 331                 talloc_free(mem_ctx);
 332                 return NT_STATUS_INVALID_PARAMETER;
 333         }
 334
 335         is_anonymous = cli_credentials_is_anonymous(gensec_security->credentials);
 336         cli_credentials_get_ntlm_username_domain(gensec_security->credentials, mem_ctx,
 337                                                  &user, &domain);
 338
 339         workstation = cli_credentials_get_workstation(gensec_security->credentials);
 340
 341         if (user == NULL) {
 342                 DEBUG(10, ("User is NULL, returning INVALID_PARAMETER\n"));
 343                 return NT_STATUS_INVALID_PARAMETER;
 344         }
 345
 346         if (domain == NULL) {
 347                 DEBUG(10, ("Domain is NULL, returning INVALID_PARAMETER\n"));
 348                 return NT_STATUS_INVALID_PARAMETER;
 349         }
 350
 351         if (workstation == NULL) {
 352                 DEBUG(10, ("Workstation is NULL, returning INVALID_PARAMETER\n"));
 353                 return NT_STATUS_INVALID_PARAMETER;
 354         }
 355
 356         if (is_anonymous) {
 357                 ntlmssp_state->neg_flags |= NTLMSSP_ANONYMOUS;
 358                 /*
 359                  * don't use the ccache for anonymous auth
 360                  */
 361                 ntlmssp_state->use_ccache = false;
 362         }
 363         if (ntlmssp_state->use_ccache) {
 364                 struct samr_Password *nt_hash = NULL;
 365
 366                 /*
 367                  * If we have a password given we don't
 368                  * use the ccache
 369                  */
 370                 nt_hash = cli_credentials_get_nt_hash(gensec_security->credentials,
 371                                                       mem_ctx);
 372                 if (nt_hash != NULL) {
 373                         ZERO_STRUCTP(nt_hash);
 374                         TALLOC_FREE(nt_hash);
 375                         ntlmssp_state->use_ccache = false;
 376                 }
 377         }
 378
 379         if (ntlmssp_state->use_ccache) {
 380                 struct wbcCredentialCacheParams params;
 381                 struct wbcCredentialCacheInfo *info = NULL;
 382                 struct wbcAuthErrorInfo *error = NULL;
 383                 struct wbcNamedBlob auth_blobs[1];
 384                 const struct wbcBlob *wbc_auth_blob = NULL;
 385                 const struct wbcBlob *wbc_session_key = NULL;
 386                 wbcErr wbc_status;
 387                 int i;
 388
 389                 params.account_name = user;
 390                 params.domain_name = domain;
 391                 params.level = WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP;
 392
 393                 auth_blobs[0].name = "challenge_blob";
 394                 auth_blobs[0].flags = 0;
 395                 auth_blobs[0].blob.data = in.data;
 396                 auth_blobs[0].blob.length = in.length;
 397                 params.num_blobs = ARRAY_SIZE(auth_blobs);
 398                 params.blobs = auth_blobs;
 399
 400                 wbc_status = wbcCredentialCache(&params, &info, &error);
 401                 wbcFreeMemory(error);
 402                 if (!WBC_ERROR_IS_OK(wbc_status)) {
 403                         return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
 404                 }
 405
 406                 for (i=0; i<info->num_blobs; i++) {
 407                         if (strequal(info->blobs[i].name, "auth_blob")) {
 408                                 wbc_auth_blob = &info->blobs[i].blob;
 409                         }
 410                         if (strequal(info->blobs[i].name, "session_key")) {
 411                                 wbc_session_key = &info->blobs[i].blob;
 412                         }
 413                 }
 414                 if ((wbc_auth_blob == NULL) || (wbc_session_key == NULL)) {
 415                         wbcFreeMemory(info);
 416                         return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
 417                 }
 418
 419                 session_key = data_blob_talloc(mem_ctx,
 420                                                wbc_session_key->data,
 421                                                wbc_session_key->length);
 422                 if (session_key.length != wbc_session_key->length) {
 423                         wbcFreeMemory(info);
 424                         return NT_STATUS_NO_MEMORY;
 425                 }
 426                 *out = data_blob_talloc(mem_ctx,
 427                                         wbc_auth_blob->data,
 428                                         wbc_auth_blob->length);
 429                 if (out->length != wbc_auth_blob->length) {
 430                         wbcFreeMemory(info);
 431                         return NT_STATUS_NO_MEMORY;
 432                 }
 433
 434                 wbcFreeMemory(info);
 435                 goto done;
 436         }
 437
 438         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 439                 flags |= CLI_CRED_NTLM2;
 440         }
 441         if (ntlmssp_state->use_ntlmv2) {
 442                 flags |= CLI_CRED_NTLMv2_AUTH;
 443         }
 444         if (ntlmssp_state->use_nt_response) {
 445                 flags |= CLI_CRED_NTLM_AUTH;
 446         }
 447         if (lpcfg_client_lanman_auth(gensec_security->settings->lp_ctx)) {
 448                 flags |= CLI_CRED_LANMAN_AUTH;
 449         }
 450
 451         nt_status = cli_credentials_get_ntlm_response(gensec_security->credentials, mem_ctx,
 452                                                       &flags, challenge_blob, target_info,
 453                                                       &lm_response, &nt_response,
 454                                                       &lm_session_key, &session_key);
 455
 456         if (!NT_STATUS_IS_OK(nt_status)) {
 457                 return nt_status;
 458         }
 459
 460         if (!(flags & CLI_CRED_LANMAN_AUTH)) {
 461                 /* LM Key is still possible, just silly, so we do not
 462                  * allow it. Fortunetly all LM crypto is off by
 463                  * default and we require command line options to end
 464                  * up here */
 465                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 466         }
 467
 468         if (!(flags & CLI_CRED_NTLM2)) {
 469                 /* NTLM2 is incompatible... */
 470                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 471         }
 472
 473         if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
 474             && lpcfg_client_lanman_auth(gensec_security->settings->lp_ctx) && lm_session_key.length == 16) {
 475                 DATA_BLOB new_session_key = data_blob_talloc(mem_ctx, NULL, 16);
 476                 if (lm_response.length == 24) {
 477                         SMBsesskeygen_lm_sess_key(lm_session_key.data, lm_response.data,
 478                                                   new_session_key.data);
 479                 } else {
 480                         static const uint8_t zeros[24];
 481                         SMBsesskeygen_lm_sess_key(lm_session_key.data, zeros,
 482                                                   new_session_key.data);
 483                 }
 484                 session_key = new_session_key;
 485                 dump_data_pw("LM session key\n", session_key.data, session_key.length);
 486         }
 487
 488
 489         /* Key exchange encryptes a new client-generated session key with
 490            the password-derived key */
 491         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
 492                 /* Make up a new session key */
 493                 uint8_t client_session_key[16];
 494                 generate_secret_buffer(client_session_key, sizeof(client_session_key));
 495
 496                 /* Encrypt the new session key with the old one */
 497                 encrypted_session_key = data_blob_talloc(ntlmssp_state,
 498                                                          client_session_key, sizeof(client_session_key));
 499                 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
 500                 arcfour_crypt(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
 501                 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
 502
 503                 /* Mark the new session key as the 'real' session key */
 504                 session_key = data_blob_talloc(mem_ctx, client_session_key, sizeof(client_session_key));
 505         }
 506
 507         /* this generates the actual auth packet */
 508         nt_status = msrpc_gen(mem_ctx,
 509                        out, auth_gen_string,
 510                        "NTLMSSP",
 511                        NTLMSSP_AUTH,
 512                        lm_response.data, lm_response.length,
 513                        nt_response.data, nt_response.length,
 514                        domain,
 515                        user,
 516                        workstation,
 517                        encrypted_session_key.data, encrypted_session_key.length,
 518                        ntlmssp_state->neg_flags,
 519                        version_blob.data, version_blob.length);
 520         if (!NT_STATUS_IS_OK(nt_status)) {
 521                 talloc_free(mem_ctx);
 522                 return nt_status;
 523         }
 524
 525 done:
 526         ntlmssp_state->session_key = session_key;
 527         talloc_steal(ntlmssp_state, session_key.data);
 528
 529         DEBUG(3, ("NTLMSSP: Set final flags:\n"));
 530         debug_ntlmssp_flags(ntlmssp_state->neg_flags);
 531
 532         talloc_steal(out_mem_ctx, out->data);
 533
 534         ntlmssp_state->expected_state = NTLMSSP_DONE;
 535
 536         if (gensec_security->want_features & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL)) {
 537                 nt_status = ntlmssp_sign_init(ntlmssp_state);
 538                 if (!NT_STATUS_IS_OK(nt_status)) {
 539                         DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
 540                                   nt_errstr(nt_status)));
 541                         talloc_free(mem_ctx);
 542                         return nt_status;
 543                 }
 544         }
 545
 546         talloc_free(mem_ctx);
 547         return NT_STATUS_OK;
 548 }
 549
 550 NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
 551 {
 552         struct gensec_ntlmssp_context *gensec_ntlmssp;
 553         struct ntlmssp_state *ntlmssp_state;
 554         NTSTATUS nt_status;
 555
 556         nt_status = gensec_ntlmssp_start(gensec_security);
 557         NT_STATUS_NOT_OK_RETURN(nt_status);
 558
 559         gensec_ntlmssp =
 560                 talloc_get_type_abort(gensec_security->private_data,
 561                                       struct gensec_ntlmssp_context);
 562
 563         ntlmssp_state = talloc_zero(gensec_ntlmssp,
 564                                     struct ntlmssp_state);
 565         if (!ntlmssp_state) {
 566                 return NT_STATUS_NO_MEMORY;
 567         }
 568
 569         gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
 570
 571         ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 572
 573         ntlmssp_state->role = NTLMSSP_CLIENT;
 574
 575         ntlmssp_state->client.netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
 576         ntlmssp_state->client.netbios_name = cli_credentials_get_workstation(gensec_security->credentials);
 577
 578         ntlmssp_state->unicode = gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "unicode", true);
 579
 580         ntlmssp_state->use_nt_response = gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "send_nt_reponse", true);
 581
 582         ntlmssp_state->allow_lm_key = (lpcfg_client_lanman_auth(gensec_security->settings->lp_ctx)
 583                                               && (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "allow_lm_key", false)
 584                                                   || gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)));
 585
 586         ntlmssp_state->use_ntlmv2 = lpcfg_client_ntlmv2_auth(gensec_security->settings->lp_ctx);
 587
 588         ntlmssp_state->expected_state = NTLMSSP_INITIAL;
 589
 590         ntlmssp_state->neg_flags =
 591                 NTLMSSP_NEGOTIATE_NTLM |
 592                 NTLMSSP_NEGOTIATE_VERSION |
 593                 NTLMSSP_REQUEST_TARGET;
 594
 595         if (ntlmssp_state->unicode) {
 596                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 597         } else {
 598                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 599         }
 600
 601         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "128bit", true)) {
 602                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
 603         }
 604
 605         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "56bit", false)) {
 606                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
 607         }
 608
 609         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)) {
 610                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
 611         }
 612
 613         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "keyexchange", true)) {
 614                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
 615         }
 616
 617         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "alwayssign", true)) {
 618                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
 619         }
 620
 621         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "ntlm2", true)) {
 622                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 623         } else {
 624                 /* apparently we can't do ntlmv2 if we don't do ntlm2 */
 625                 ntlmssp_state->use_ntlmv2 = false;
 626         }
 627
 628         if (ntlmssp_state->use_ntlmv2) {
 629                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 630         }
 631
 632         if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
 633                 /*
 634                  * We need to set this to allow a later SetPassword
 635                  * via the SAMR pipe to succeed. Strange.... We could
 636                  * also add  NTLMSSP_NEGOTIATE_SEAL here. JRA.
 637                  *
 638                  * Without this, Windows will not create the master key
 639                  * that it thinks is only used for NTLMSSP signing and
 640                  * sealing.  (It is actually pulled out and used directly)
 641                  */
 642                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 643         }
 644         if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
 645                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 646
 647                 if (gensec_security->want_features & GENSEC_FEATURE_LDAP_STYLE) {
 648                         /*
 649                          * We need to handle NTLMSSP_NEGOTIATE_SIGN as
 650                          * NTLMSSP_NEGOTIATE_SEAL if GENSEC_FEATURE_LDAP_STYLE
 651                          * is requested.
 652                          */
 653                         ntlmssp_state->force_wrap_seal = true;
 654                         /*
 655                          * We want also work against old Samba servers
 656                          * which didn't had GENSEC_FEATURE_LDAP_STYLE
 657                          * we negotiate SEAL too. We may remove this
 658                          * in a few years. As all servers should have
 659                          * GENSEC_FEATURE_LDAP_STYLE by then.
 660                          */
 661                         ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
 662                 }
 663         }
 664         if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
 665                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
 666                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
 667         }
 668         if (gensec_security->want_features & GENSEC_FEATURE_NTLM_CCACHE) {
 669                 ntlmssp_state->use_ccache = true;
 670         }
 671
 672         return NT_STATUS_OK;
 673 }
 674
 675 NTSTATUS gensec_ntlmssp_resume_ccache_start(struct gensec_security *gensec_security)
 676 {
 677         struct gensec_ntlmssp_context *gensec_ntlmssp = NULL;
 678         NTSTATUS status;
 679
 680         status = gensec_ntlmssp_client_start(gensec_security);
 681         if (!NT_STATUS_IS_OK(status)) {
 682                 return status;
 683         }
 684
 685         gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
 686                                                struct gensec_ntlmssp_context);
 687         gensec_ntlmssp->ntlmssp_state->use_ccache = false;
 688         gensec_ntlmssp->ntlmssp_state->resume_ccache = true;
 689         gensec_ntlmssp->ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
 690
 691         return NT_STATUS_OK;
 692 }