source3/libsmb/ntlmssp.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    handle NLTMSSP, server side
   5
   6    Copyright (C) Andrew Tridgell      2001
   7    Copyright (C) Andrew Bartlett 2001-2003
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
  27                                        DATA_BLOB reply, DATA_BLOB *next_request);
  28 static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
  29                                          const DATA_BLOB in, DATA_BLOB *out);
  30 static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
  31                                          const DATA_BLOB reply, DATA_BLOB *next_request);
  32 static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
  33                                     const DATA_BLOB request, DATA_BLOB *reply);
  34
  35 /**
  36  * Callbacks for NTLMSSP - for both client and server operating modes
  37  *
  38  */
  39
  40 static const struct ntlmssp_callbacks {
  41         enum NTLMSSP_ROLE role;
  42         enum NTLM_MESSAGE_TYPE ntlmssp_command;
  43         NTSTATUS (*fn)(struct ntlmssp_state *ntlmssp_state,
  44                        DATA_BLOB in, DATA_BLOB *out);
  45 } ntlmssp_callbacks[] = {
  46         {NTLMSSP_CLIENT, NTLMSSP_INITIAL, ntlmssp_client_initial},
  47         {NTLMSSP_SERVER, NTLMSSP_NEGOTIATE, ntlmssp_server_negotiate},
  48         {NTLMSSP_CLIENT, NTLMSSP_CHALLENGE, ntlmssp_client_challenge},
  49         {NTLMSSP_SERVER, NTLMSSP_AUTH, ntlmssp_server_auth},
  50         {NTLMSSP_CLIENT, NTLMSSP_UNKNOWN, NULL},
  51         {NTLMSSP_SERVER, NTLMSSP_UNKNOWN, NULL}
  52 };
  53
  54
  55 /**
  56  * Print out the NTLMSSP flags for debugging
  57  * @param neg_flags The flags from the packet
  58  */
  59
  60 void debug_ntlmssp_flags(uint32 neg_flags)
  61 {
  62         DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
  63
  64         if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
  65                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_UNICODE\n"));
  66         if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
  67                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_OEM\n"));
  68         if (neg_flags & NTLMSSP_REQUEST_TARGET)
  69                 DEBUGADD(4, ("  NTLMSSP_REQUEST_TARGET\n"));
  70         if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
  71                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_SIGN\n"));
  72         if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
  73                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_SEAL\n"));
  74         if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
  75                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_LM_KEY\n"));
  76         if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
  77                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NETWARE\n"));
  78         if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
  79                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NTLM\n"));
  80         if (neg_flags & NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED)
  81                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED\n"));
  82         if (neg_flags & NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED)
  83                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED\n"));
  84         if (neg_flags & NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL)
  85                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
  86         if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
  87                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
  88         if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
  89                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NTLM2\n"));
  90         if (neg_flags & NTLMSSP_CHAL_TARGET_INFO)
  91                 DEBUGADD(4, ("  NTLMSSP_CHAL_TARGET_INFO\n"));
  92         if (neg_flags & NTLMSSP_NEGOTIATE_128)
  93                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_128\n"));
  94         if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
  95                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
  96 }
  97
  98 /**
  99  * Default challenge generation code.
 100  *
 101  */
 102
 103 static const uint8 *get_challenge(const struct ntlmssp_state *ntlmssp_state)
 104 {
 105         static uchar chal[8];
 106         generate_random_buffer(chal, sizeof(chal), False);
 107
 108         return chal;
 109 }
 110
 111 /**
 112  * Default 'we can set the challenge to anything we like' implementation
 113  *
 114  */
 115
 116 static BOOL may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
 117 {
 118         return True;
 119 }
 120
 121 /**
 122  * Default 'we can set the challenge to anything we like' implementation
 123  *
 124  * Does not actually do anything, as the value is always in the structure anyway.
 125  *
 126  */
 127
 128 static NTSTATUS set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
 129 {
 130         SMB_ASSERT(challenge->length == 8);
 131         return NT_STATUS_OK;
 132 }
 133
 134 /**
 135  * Set a username on an NTLMSSP context - ensures it is talloc()ed
 136  *
 137  */
 138
 139 NTSTATUS ntlmssp_set_username(NTLMSSP_STATE *ntlmssp_state, const char *user)
 140 {
 141         ntlmssp_state->user = talloc_strdup(ntlmssp_state->mem_ctx, user);
 142         if (!ntlmssp_state->user) {
 143                 return NT_STATUS_NO_MEMORY;
 144         }
 145         return NT_STATUS_OK;
 146 }
 147
 148 /**
 149  * Set a password on an NTLMSSP context - ensures it is talloc()ed
 150  *
 151  */
 152 NTSTATUS ntlmssp_set_password(NTLMSSP_STATE *ntlmssp_state, const char *password)
 153 {
 154         if (!password) {
 155                 ntlmssp_state->password = NULL;
 156         } else {
 157                 ntlmssp_state->password = talloc_strdup(ntlmssp_state->mem_ctx, password);
 158                 if (!ntlmssp_state->password) {
 159                         return NT_STATUS_NO_MEMORY;
 160                 }
 161         }
 162         return NT_STATUS_OK;
 163 }
 164
 165 /**
 166  * Set a domain on an NTLMSSP context - ensures it is talloc()ed
 167  *
 168  */
 169 NTSTATUS ntlmssp_set_domain(NTLMSSP_STATE *ntlmssp_state, const char *domain)
 170 {
 171         ntlmssp_state->domain = talloc_strdup(ntlmssp_state->mem_ctx, domain);
 172         if (!ntlmssp_state->domain) {
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175         return NT_STATUS_OK;
 176 }
 177
 178 /**
 179  * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
 180  *
 181  */
 182 NTSTATUS ntlmssp_set_workstation(NTLMSSP_STATE *ntlmssp_state, const char *workstation)
 183 {
 184         ntlmssp_state->workstation = talloc_strdup(ntlmssp_state->mem_ctx, workstation);
 185         if (!ntlmssp_state->domain) {
 186                 return NT_STATUS_NO_MEMORY;
 187         }
 188         return NT_STATUS_OK;
 189 }
 190
 191 /**
 192  *  Store a DATA_BLOB containing an NTLMSSP response, for use later.
 193  *  This copies the data blob
 194  */
 195
 196 NTSTATUS ntlmssp_store_response(NTLMSSP_STATE *ntlmssp_state,
 197                                 DATA_BLOB response)
 198 {
 199         ntlmssp_state->stored_response = data_blob_talloc(ntlmssp_state->mem_ctx,
 200                                                           response.data, response.length);
 201         return NT_STATUS_OK;
 202 }
 203
 204 /**
 205  * Next state function for the NTLMSSP state machine
 206  *
 207  * @param ntlmssp_state NTLMSSP State
 208  * @param in The packet in from the NTLMSSP partner, as a DATA_BLOB
 209  * @param out The reply, as an allocated DATA_BLOB, caller to free.
 210  * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
 211  */
 212
 213 NTSTATUS ntlmssp_update(NTLMSSP_STATE *ntlmssp_state,
 214                         const DATA_BLOB in, DATA_BLOB *out)
 215 {
 216         DATA_BLOB input;
 217         uint32 ntlmssp_command;
 218         int i;
 219
 220         *out = data_blob(NULL, 0);
 221
 222         if (!in.length && ntlmssp_state->stored_response.length) {
 223                 input = ntlmssp_state->stored_response;
 224
 225                 /* we only want to read the stored response once - overwrite it */
 226                 ntlmssp_state->stored_response = data_blob(NULL, 0);
 227         } else {
 228                 input = in;
 229         }
 230
 231         if (!input.length) {
 232                 switch (ntlmssp_state->role) {
 233                 case NTLMSSP_CLIENT:
 234                         ntlmssp_command = NTLMSSP_INITIAL;
 235                         break;
 236                 case NTLMSSP_SERVER:
 237                         /* 'datagram' mode - no neg packet */
 238                         ntlmssp_command = NTLMSSP_NEGOTIATE;
 239                         break;
 240                 }
 241         } else {
 242                 if (!msrpc_parse(&input, "Cd",
 243                                  "NTLMSSP",
 244                                  &ntlmssp_command)) {
 245                         DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
 246                         dump_data(2, (const char *)input.data, input.length);
 247                         return NT_STATUS_INVALID_PARAMETER;
 248                 }
 249         }
 250
 251         if (ntlmssp_command != ntlmssp_state->expected_state) {
 252                 DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
 253                 return NT_STATUS_INVALID_PARAMETER;
 254         }
 255
 256         for (i=0; ntlmssp_callbacks[i].fn; i++) {
 257                 if (ntlmssp_callbacks[i].role == ntlmssp_state->role
 258                     && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
 259                         return ntlmssp_callbacks[i].fn(ntlmssp_state, input, out);
 260                 }
 261         }
 262
 263         DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
 264                   ntlmssp_state->role, ntlmssp_command));
 265
 266         return NT_STATUS_INVALID_PARAMETER;
 267 }
 268
 269 /**
 270  * End an NTLMSSP state machine
 271  *
 272  * @param ntlmssp_state NTLMSSP State, free()ed by this function
 273  */
 274
 275 void ntlmssp_end(NTLMSSP_STATE **ntlmssp_state)
 276 {
 277         TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
 278
 279         (*ntlmssp_state)->ref_count--;
 280
 281         if ((*ntlmssp_state)->ref_count == 0) {
 282                 data_blob_free(&(*ntlmssp_state)->chal);
 283                 data_blob_free(&(*ntlmssp_state)->lm_resp);
 284                 data_blob_free(&(*ntlmssp_state)->nt_resp);
 285
 286                 talloc_destroy(mem_ctx);
 287         }
 288
 289         *ntlmssp_state = NULL;
 290         return;
 291 }
 292
 293 /**
 294  * Determine correct target name flags for reply, given server role
 295  * and negotiated flags
 296  *
 297  * @param ntlmssp_state NTLMSSP State
 298  * @param neg_flags The flags from the packet
 299  * @param chal_flags The flags to be set in the reply packet
 300  * @return The 'target name' string.
 301  */
 302
 303 static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
 304                                        uint32 neg_flags, uint32 *chal_flags)
 305 {
 306         if (neg_flags & NTLMSSP_REQUEST_TARGET) {
 307                 *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
 308                 *chal_flags |= NTLMSSP_REQUEST_TARGET;
 309                 if (ntlmssp_state->server_role == ROLE_STANDALONE) {
 310                         *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
 311                         return ntlmssp_state->get_global_myname();
 312                 } else {
 313                         *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
 314                         return ntlmssp_state->get_domain();
 315                 };
 316         } else {
 317                 return "";
 318         }
 319 }
 320
 321 static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
 322                                       uint32 neg_flags, BOOL allow_lm) {
 323         if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
 324                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 325                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
 326                 ntlmssp_state->unicode = True;
 327         } else {
 328                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
 329                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 330                 ntlmssp_state->unicode = False;
 331         }
 332
 333         if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm) {
 334                 /* other end forcing us to use LM */
 335                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
 336                 ntlmssp_state->use_ntlmv2 = False;
 337         } else {
 338                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 339         }
 340
 341         if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
 342                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 343         }
 344
 345         if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
 346                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
 347         }
 348
 349         if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
 350                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
 351         }
 352
 353         if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
 354                 ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
 355         }
 356
 357 }
 358
 359
 360 /**
 361  * Next state function for the Negotiate packet
 362  *
 363  * @param ntlmssp_state NTLMSSP State
 364  * @param request The request, as a DATA_BLOB
 365  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 366  * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
 367  */
 368
 369 static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
 370                                          const DATA_BLOB request, DATA_BLOB *reply)
 371 {
 372         DATA_BLOB struct_blob;
 373         fstring dnsname, dnsdomname;
 374         uint32 neg_flags = 0;
 375         uint32 ntlmssp_command, chal_flags;
 376         char *cliname=NULL, *domname=NULL;
 377         const uint8 *cryptkey;
 378         const char *target_name;
 379
 380         /* parse the NTLMSSP packet */
 381 #if 0
 382         file_save("ntlmssp_negotiate.dat", request.data, request.length);
 383 #endif
 384
 385         if (request.length) {
 386                 if (!msrpc_parse(&request, "CddAA",
 387                                  "NTLMSSP",
 388                                  &ntlmssp_command,
 389                                  &neg_flags,
 390                                  &cliname,
 391                                  &domname)) {
 392                         DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
 393                         dump_data(2, (const char *)request.data, request.length);
 394                         return NT_STATUS_INVALID_PARAMETER;
 395                 }
 396
 397                 SAFE_FREE(cliname);
 398                 SAFE_FREE(domname);
 399
 400                 debug_ntlmssp_flags(neg_flags);
 401         }
 402
 403         ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth());
 404
 405         /* Ask our caller what challenge they would like in the packet */
 406         cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
 407
 408         /* Check if we may set the challenge */
 409         if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
 410                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 411         }
 412
 413         /* The flags we send back are not just the negotiated flags,
 414          * they are also 'what is in this packet'.  Therfore, we
 415          * operate on 'chal_flags' from here on
 416          */
 417
 418         chal_flags = ntlmssp_state->neg_flags;
 419
 420         /* get the right name to fill in as 'target' */
 421         target_name = ntlmssp_target_name(ntlmssp_state,
 422                                           neg_flags, &chal_flags);
 423         if (target_name == NULL)
 424                 return NT_STATUS_INVALID_PARAMETER;
 425
 426         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
 427         ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
 428
 429
 430         /* This should be a 'netbios domain -> DNS domain' mapping */
 431         dnsdomname[0] = '\0';
 432         get_mydomname(dnsdomname);
 433         strlower_m(dnsdomname);
 434
 435         dnsname[0] = '\0';
 436         get_myfullname(dnsname);
 437         strlower_m(dnsname);
 438
 439         /* This creates the 'blob' of names that appears at the end of the packet */
 440         if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
 441         {
 442                 const char *target_name_dns = "";
 443                 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
 444                         target_name_dns = dnsdomname;
 445                 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
 446                         target_name_dns = dnsname;
 447                 }
 448
 449                 msrpc_gen(&struct_blob, "aaaaa",
 450                           NTLMSSP_NAME_TYPE_DOMAIN, target_name,
 451                           NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->get_global_myname(),
 452                           NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
 453                           NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
 454                           0, "");
 455         } else {
 456                 struct_blob = data_blob(NULL, 0);
 457         }
 458
 459         {
 460                 /* Marshel the packet in the right format, be it unicode or ASCII */
 461                 const char *gen_string;
 462                 if (ntlmssp_state->unicode) {
 463                         gen_string = "CdUdbddB";
 464                 } else {
 465                         gen_string = "CdAdbddB";
 466                 }
 467
 468                 msrpc_gen(reply, gen_string,
 469                           "NTLMSSP",
 470                           NTLMSSP_CHALLENGE,
 471                           target_name,
 472                           chal_flags,
 473                           cryptkey, 8,
 474                           0, 0,
 475                           struct_blob.data, struct_blob.length);
 476         }
 477
 478         data_blob_free(&struct_blob);
 479
 480         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 481
 482         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 483 }
 484
 485 /**
 486  * Next state function for the Authenticate packet
 487  *
 488  * @param ntlmssp_state NTLMSSP State
 489  * @param request The request, as a DATA_BLOB
 490  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 491  * @return Errors or NT_STATUS_OK.
 492  */
 493
 494 static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
 495                                     const DATA_BLOB request, DATA_BLOB *reply)
 496 {
 497         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 498         DATA_BLOB nt_session_key = data_blob(NULL, 0);
 499         DATA_BLOB lm_session_key = data_blob(NULL, 0);
 500         DATA_BLOB session_key = data_blob(NULL, 0);
 501         uint32 ntlmssp_command, auth_flags;
 502         NTSTATUS nt_status;
 503
 504         /* used by NTLM2 */
 505         BOOL doing_ntlm2 = False;
 506
 507         uchar session_nonce[16];
 508         uchar session_nonce_hash[16];
 509
 510         const char *parse_string;
 511         char *domain = NULL;
 512         char *user = NULL;
 513         char *workstation = NULL;
 514
 515         /* parse the NTLMSSP packet */
 516         *reply = data_blob(NULL, 0);
 517
 518 #if 0
 519         file_save("ntlmssp_auth.dat", request.data, request.length);
 520 #endif
 521
 522         if (ntlmssp_state->unicode) {
 523                 parse_string = "CdBBUUUBd";
 524         } else {
 525                 parse_string = "CdBBAAABd";
 526         }
 527
 528         data_blob_free(&ntlmssp_state->lm_resp);
 529         data_blob_free(&ntlmssp_state->nt_resp);
 530
 531         ntlmssp_state->user = NULL;
 532         ntlmssp_state->domain = NULL;
 533         ntlmssp_state->workstation = NULL;
 534
 535         /* now the NTLMSSP encoded auth hashes */
 536         if (!msrpc_parse(&request, parse_string,
 537                          "NTLMSSP",
 538                          &ntlmssp_command,
 539                          &ntlmssp_state->lm_resp,
 540                          &ntlmssp_state->nt_resp,
 541                          &domain,
 542                          &user,
 543                          &workstation,
 544                          &encrypted_session_key,
 545                          &auth_flags)) {
 546                 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
 547                 dump_data(2, (const char *)request.data, request.length);
 548                 SAFE_FREE(domain);
 549                 SAFE_FREE(user);
 550                 SAFE_FREE(workstation);
 551                 data_blob_free(&encrypted_session_key);
 552                 auth_flags = 0;
 553
 554                 /* Try again with a shorter string (Win9X truncates this packet) */
 555                 if (ntlmssp_state->unicode) {
 556                         parse_string = "CdBBUUU";
 557                 } else {
 558                         parse_string = "CdBBAAA";
 559                 }
 560
 561                 /* now the NTLMSSP encoded auth hashes */
 562                 if (!msrpc_parse(&request, parse_string,
 563                                  "NTLMSSP",
 564                                  &ntlmssp_command,
 565                                  &ntlmssp_state->lm_resp,
 566                                  &ntlmssp_state->nt_resp,
 567                                  &domain,
 568                                  &user,
 569                                  &workstation)) {
 570                         DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
 571                         dump_data(2, (const char *)request.data, request.length);
 572                         SAFE_FREE(domain);
 573                         SAFE_FREE(user);
 574                         SAFE_FREE(workstation);
 575
 576                         return NT_STATUS_INVALID_PARAMETER;
 577                 }
 578         }
 579
 580         if (auth_flags)
 581                 ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, lp_lanman_auth());
 582
 583         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 584                 SAFE_FREE(domain);
 585                 SAFE_FREE(user);
 586                 SAFE_FREE(workstation);
 587                 data_blob_free(&encrypted_session_key);
 588                 return nt_status;
 589         }
 590
 591         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 592                 SAFE_FREE(domain);
 593                 SAFE_FREE(user);
 594                 SAFE_FREE(workstation);
 595                 data_blob_free(&encrypted_session_key);
 596                 return nt_status;
 597         }
 598
 599         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(ntlmssp_state, workstation))) {
 600                 SAFE_FREE(domain);
 601                 SAFE_FREE(user);
 602                 SAFE_FREE(workstation);
 603                 data_blob_free(&encrypted_session_key);
 604                 return nt_status;
 605         }
 606
 607         SAFE_FREE(domain);
 608         SAFE_FREE(user);
 609         SAFE_FREE(workstation);
 610
 611         DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
 612                  ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, (unsigned long)ntlmssp_state->lm_resp.length, (unsigned long)ntlmssp_state->nt_resp.length));
 613
 614 #if 0
 615         file_save("nthash1.dat",  &ntlmssp_state->nt_resp.data,  &ntlmssp_state->nt_resp.length);
 616         file_save("lmhash1.dat",  &ntlmssp_state->lm_resp.data,  &ntlmssp_state->lm_resp.length);
 617 #endif
 618
 619         /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
 620            client challenge
 621
 622            However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
 623         */
 624         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 625                 if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
 626                         struct MD5Context md5_session_nonce_ctx;
 627                         SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
 628
 629                         doing_ntlm2 = True;
 630
 631                         memcpy(session_nonce, ntlmssp_state->internal_chal.data, 8);
 632                         memcpy(&session_nonce[8], ntlmssp_state->lm_resp.data, 8);
 633
 634                         MD5Init(&md5_session_nonce_ctx);
 635                         MD5Update(&md5_session_nonce_ctx, session_nonce, 16);
 636                         MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 637
 638                         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, session_nonce_hash, 8);
 639
 640                         /* LM response is no longer useful */
 641                         data_blob_free(&ntlmssp_state->lm_resp);
 642
 643                         /* We changed the effective challenge - set it */
 644                         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->set_challenge(ntlmssp_state, &ntlmssp_state->chal))) {
 645                                 data_blob_free(&encrypted_session_key);
 646                                 return nt_status;
 647                         }
 648                 }
 649         }
 650
 651         /*
 652          * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
 653          * is required (by "ntlm auth = no" and "lm auth = no" being set in the
 654          * smb.conf file) and no NTLMv2 response was sent then the password check
 655          * will fail here. JRA.
 656          */
 657
 658         /* Finally, actually ask if the password is OK */
 659
 660         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state, &nt_session_key, &lm_session_key))) {
 661                 data_blob_free(&encrypted_session_key);
 662                 return nt_status;
 663         }
 664
 665         dump_data_pw("NT session key:\n", nt_session_key.data, nt_session_key.length);
 666         dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
 667
 668         /* Handle the different session key derivation for NTLM2 */
 669         if (doing_ntlm2) {
 670                 if (nt_session_key.data && nt_session_key.length == 16) {
 671                         session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 672                         hmac_md5(nt_session_key.data, session_nonce,
 673                                  sizeof(session_nonce), session_key.data);
 674                         DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
 675                         dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 676
 677                 } else {
 678                         data_blob_free(&encrypted_session_key);
 679                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
 680                         return NT_STATUS_INVALID_PARAMETER;
 681                 }
 682         } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
 683                 if (lm_session_key.data && lm_session_key.length >= 8) {
 684                         if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
 685                                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 686                                 SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
 687                                                           session_key.data);
 688                                 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
 689                                 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
 690                         } else {
 691                                 /* use the key unmodified - it's
 692                                  * probably a NULL key from the guest
 693                                  * login */
 694                                 session_key = lm_session_key;
 695                         }
 696                 } else {
 697                         data_blob_free(&encrypted_session_key);
 698                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
 699                         return NT_STATUS_INVALID_PARAMETER;
 700                 }
 701         } else if (nt_session_key.data) {
 702                 session_key = nt_session_key;
 703                 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
 704                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 705         } else if (lm_session_key.data) {
 706                 session_key = lm_session_key;
 707                 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
 708                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 709         } else {
 710                 data_blob_free(&encrypted_session_key);
 711                 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
 712                 return NT_STATUS_INVALID_PARAMETER;
 713         }
 714
 715         /* With KEY_EXCH, the client supplies the proposed session key,
 716            but encrypts it with the long-term key */
 717         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
 718                 if (!encrypted_session_key.data || encrypted_session_key.length != 16) {
 719                         data_blob_free(&encrypted_session_key);
 720                         DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
 721                                   encrypted_session_key.length));
 722                         return NT_STATUS_INVALID_PARAMETER;
 723                 } else if (!session_key.data || session_key.length != 16) {
 724                         DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
 725                                   session_key.length));
 726                 } else {
 727                         dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
 728                         SamOEMhash(encrypted_session_key.data,
 729                                    session_key.data,
 730                                    encrypted_session_key.length);
 731                         ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state->mem_ctx,
 732                                                                       encrypted_session_key.data,
 733                                                                       encrypted_session_key.length);
 734                         dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data,
 735                                 encrypted_session_key.length);
 736                 }
 737         } else {
 738                 ntlmssp_state->session_key = session_key;
 739         }
 740
 741         data_blob_free(&encrypted_session_key);
 742
 743         /* allow arbitarily many authentications */
 744         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 745
 746         return nt_status;
 747 }
 748
 749 /**
 750  * Create an NTLMSSP state machine
 751  *
 752  * @param ntlmssp_state NTLMSSP State, allocated by this function
 753  */
 754
 755 NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
 756 {
 757         TALLOC_CTX *mem_ctx;
 758
 759         mem_ctx = talloc_init("NTLMSSP context");
 760
 761         *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
 762         if (!*ntlmssp_state) {
 763                 DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
 764                 talloc_destroy(mem_ctx);
 765                 return NT_STATUS_NO_MEMORY;
 766         }
 767
 768         (*ntlmssp_state)->role = NTLMSSP_SERVER;
 769
 770         (*ntlmssp_state)->mem_ctx = mem_ctx;
 771         (*ntlmssp_state)->get_challenge = get_challenge;
 772         (*ntlmssp_state)->set_challenge = set_challenge;
 773         (*ntlmssp_state)->may_set_challenge = may_set_challenge;
 774
 775         (*ntlmssp_state)->get_global_myname = global_myname;
 776         (*ntlmssp_state)->get_domain = lp_workgroup;
 777         (*ntlmssp_state)->server_role = ROLE_DOMAIN_MEMBER; /* a good default */
 778
 779         (*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
 780
 781         (*ntlmssp_state)->ref_count = 1;
 782
 783         (*ntlmssp_state)->neg_flags =
 784                 NTLMSSP_NEGOTIATE_128 |
 785                 NTLMSSP_NEGOTIATE_NTLM |
 786                 NTLMSSP_NEGOTIATE_NTLM2 |
 787                 NTLMSSP_NEGOTIATE_KEY_EXCH |
 788                 NTLMSSP_NEGOTIATE_SIGN;
 789
 790         return NT_STATUS_OK;
 791 }
 792
 793 /*********************************************************************
 794  Client side NTLMSSP
 795 *********************************************************************/
 796
 797 /**
 798  * Next state function for the Initial packet
 799  *
 800  * @param ntlmssp_state NTLMSSP State
 801  * @param request The request, as a DATA_BLOB.  reply.data must be NULL
 802  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 803  * @return Errors or NT_STATUS_OK.
 804  */
 805
 806 static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
 807                                   DATA_BLOB reply, DATA_BLOB *next_request)
 808 {
 809         if (ntlmssp_state->unicode) {
 810                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 811         } else {
 812                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 813         }
 814
 815         if (ntlmssp_state->use_ntlmv2) {
 816                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 817         }
 818
 819         /* generate the ntlmssp negotiate packet */
 820         msrpc_gen(next_request, "CddAA",
 821                   "NTLMSSP",
 822                   NTLMSSP_NEGOTIATE,
 823                   ntlmssp_state->neg_flags,
 824                   ntlmssp_state->get_domain(),
 825                   ntlmssp_state->get_global_myname());
 826
 827         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 828
 829         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 830 }
 831
 832 /**
 833  * Next state function for the Challenge Packet.  Generate an auth packet.
 834  *
 835  * @param ntlmssp_state NTLMSSP State
 836  * @param request The request, as a DATA_BLOB.  reply.data must be NULL
 837  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 838  * @return Errors or NT_STATUS_OK.
 839  */
 840
 841 static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
 842                                          const DATA_BLOB reply, DATA_BLOB *next_request)
 843 {
 844         uint32 chal_flags, ntlmssp_command, unkn1, unkn2;
 845         DATA_BLOB server_domain_blob;
 846         DATA_BLOB challenge_blob;
 847         DATA_BLOB struct_blob = data_blob(NULL, 0);
 848         char *server_domain;
 849         const char *chal_parse_string;
 850         const char *auth_gen_string;
 851         DATA_BLOB lm_response = data_blob(NULL, 0);
 852         DATA_BLOB nt_response = data_blob(NULL, 0);
 853         DATA_BLOB session_key = data_blob(NULL, 0);
 854         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 855         NTSTATUS nt_status;
 856
 857         if (!msrpc_parse(&reply, "CdBd",
 858                          "NTLMSSP",
 859                          &ntlmssp_command,
 860                          &server_domain_blob,
 861                          &chal_flags)) {
 862                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
 863                 dump_data(2, (const char *)reply.data, reply.length);
 864
 865                 return NT_STATUS_INVALID_PARAMETER;
 866         }
 867
 868         data_blob_free(&server_domain_blob);
 869
 870         DEBUG(3, ("Got challenge flags:\n"));
 871         debug_ntlmssp_flags(chal_flags);
 872
 873         ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
 874
 875         if (ntlmssp_state->unicode) {
 876                 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
 877                         chal_parse_string = "CdUdbddB";
 878                 } else {
 879                         chal_parse_string = "CdUdbdd";
 880                 }
 881                 auth_gen_string = "CdBBUUUBd";
 882         } else {
 883                 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
 884                         chal_parse_string = "CdAdbddB";
 885                 } else {
 886                         chal_parse_string = "CdAdbdd";
 887                 }
 888
 889                 auth_gen_string = "CdBBAAABd";
 890         }
 891
 892         DEBUG(3, ("NTLMSSP: Set final flags:\n"));
 893         debug_ntlmssp_flags(ntlmssp_state->neg_flags);
 894
 895         if (!msrpc_parse(&reply, chal_parse_string,
 896                          "NTLMSSP",
 897                          &ntlmssp_command,
 898                          &server_domain,
 899                          &chal_flags,
 900                          &challenge_blob, 8,
 901                          &unkn1, &unkn2,
 902                          &struct_blob)) {
 903                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
 904                 dump_data(2, (const char *)reply.data, reply.length);
 905                 return NT_STATUS_INVALID_PARAMETER;
 906         }
 907
 908         ntlmssp_state->server_domain = talloc_strdup(ntlmssp_state->mem_ctx,
 909                                                      server_domain);
 910
 911         SAFE_FREE(server_domain);
 912         if (challenge_blob.length != 8) {
 913                 data_blob_free(&struct_blob);
 914                 return NT_STATUS_INVALID_PARAMETER;
 915         }
 916
 917         if (!ntlmssp_state->password) {
 918                 /* do nothing - blobs are zero length */
 919         } else if (ntlmssp_state->use_ntlmv2) {
 920
 921                 if (!struct_blob.length) {
 922                         /* be lazy, match win2k - we can't do NTLMv2 without it */
 923                         DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
 924                         return NT_STATUS_INVALID_PARAMETER;
 925                 }
 926
 927                 /* TODO: if the remote server is standalone, then we should replace 'domain'
 928                    with the server name as supplied above */
 929
 930                 if (!SMBNTLMv2encrypt(ntlmssp_state->user,
 931                                       ntlmssp_state->domain,
 932                                       ntlmssp_state->password, &challenge_blob,
 933                                       &struct_blob,
 934                                       &lm_response, &nt_response, &session_key)) {
 935                         data_blob_free(&challenge_blob);
 936                         data_blob_free(&struct_blob);
 937                         return NT_STATUS_NO_MEMORY;
 938                 }
 939         } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 940                 struct MD5Context md5_session_nonce_ctx;
 941                 uchar nt_hash[16];
 942                 uchar session_nonce[16];
 943                 uchar session_nonce_hash[16];
 944                 uchar nt_session_key[16];
 945                 E_md4hash(ntlmssp_state->password, nt_hash);
 946
 947                 lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 948                 generate_random_buffer(lm_response.data, 8, False);
 949                 memset(lm_response.data+8, 0, 16);
 950
 951                 memcpy(session_nonce, challenge_blob.data, 8);
 952                 memcpy(&session_nonce[8], lm_response.data, 8);
 953
 954                 MD5Init(&md5_session_nonce_ctx);
 955                 MD5Update(&md5_session_nonce_ctx, challenge_blob.data, 8);
 956                 MD5Update(&md5_session_nonce_ctx, lm_response.data, 8);
 957                 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 958
 959                 DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
 960                 DEBUG(5, ("challenge is: \n"));
 961                 dump_data(5, session_nonce_hash, 8);
 962
 963                 nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 964                 SMBNTencrypt(ntlmssp_state->password,
 965                              session_nonce_hash,
 966                              nt_response.data);
 967
 968                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 969
 970                 SMBsesskeygen_ntv1(nt_hash, NULL, nt_session_key);
 971                 hmac_md5(nt_session_key, session_nonce, sizeof(session_nonce), session_key.data);
 972                 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 973         } else {
 974
 975
 976                 uchar lm_hash[16];
 977                 uchar nt_hash[16];
 978                 E_deshash(ntlmssp_state->password, lm_hash);
 979                 E_md4hash(ntlmssp_state->password, nt_hash);
 980
 981                 /* lanman auth is insecure, it may be disabled */
 982                 if (lp_client_lanman_auth()) {
 983                         lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 984                         SMBencrypt(ntlmssp_state->password,challenge_blob.data,
 985                                    lm_response.data);
 986                 }
 987
 988                 nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 989                 SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
 990                              nt_response.data);
 991
 992                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 993                 if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
 994                     && lp_client_lanman_auth()) {
 995                         SMBsesskeygen_lmv1(lm_hash, lm_response.data,
 996                                            session_key.data);
 997                         dump_data_pw("LM session key\n", session_key.data, session_key.length);
 998                 } else {
 999                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
1000                         dump_data_pw("NT session key:\n", session_key.data, session_key.length);
1001                 }
1002         }
1003         data_blob_free(&struct_blob);
1004
1005         /* Key exchange encryptes a new client-generated session key with
1006            the password-derived key */
1007         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
1008                 uint8 client_session_key[16];
1009
1010                 generate_random_buffer(client_session_key, sizeof(client_session_key), False);
1011                 encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key));
1012                 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
1013
1014                 SamOEMhash(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
1015                 data_blob_free(&session_key);
1016                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, client_session_key, sizeof(client_session_key));
1017                 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
1018         }
1019
1020         /* this generates the actual auth packet */
1021         if (!msrpc_gen(next_request, auth_gen_string,
1022                        "NTLMSSP",
1023                        NTLMSSP_AUTH,
1024                        lm_response.data, lm_response.length,
1025                        nt_response.data, nt_response.length,
1026                        ntlmssp_state->domain,
1027                        ntlmssp_state->user,
1028                        ntlmssp_state->get_global_myname(),
1029                        encrypted_session_key.data, encrypted_session_key.length,
1030                        ntlmssp_state->neg_flags)) {
1031
1032                 return NT_STATUS_NO_MEMORY;
1033         }
1034
1035         data_blob_free(&encrypted_session_key);
1036
1037         data_blob_free(&ntlmssp_state->chal);
1038
1039         ntlmssp_state->chal = challenge_blob;
1040         ntlmssp_state->lm_resp = lm_response;
1041         ntlmssp_state->nt_resp = nt_response;
1042         ntlmssp_state->session_key = session_key;
1043
1044         ntlmssp_state->expected_state = NTLMSSP_UNKNOWN;
1045
1046         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_sign_init(ntlmssp_state))) {
1047                 DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n", nt_errstr(nt_status)));
1048                 return nt_status;
1049         }
1050
1051         return NT_STATUS_MORE_PROCESSING_REQUIRED;
1052 }
1053
1054 NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state)
1055 {
1056         TALLOC_CTX *mem_ctx;
1057
1058         mem_ctx = talloc_init("NTLMSSP Client context");
1059
1060         *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
1061         if (!*ntlmssp_state) {
1062                 DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
1063                 talloc_destroy(mem_ctx);
1064                 return NT_STATUS_NO_MEMORY;
1065         }
1066
1067         (*ntlmssp_state)->role = NTLMSSP_CLIENT;
1068
1069         (*ntlmssp_state)->mem_ctx = mem_ctx;
1070
1071         (*ntlmssp_state)->get_global_myname = global_myname;
1072         (*ntlmssp_state)->get_domain = lp_workgroup;
1073
1074         (*ntlmssp_state)->unicode = True;
1075
1076         (*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
1077
1078         (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
1079
1080         (*ntlmssp_state)->ref_count = 1;
1081
1082         (*ntlmssp_state)->neg_flags =
1083                 NTLMSSP_NEGOTIATE_128 |
1084                 NTLMSSP_NEGOTIATE_NTLM |
1085                 NTLMSSP_NEGOTIATE_NTLM2 |
1086                 NTLMSSP_NEGOTIATE_KEY_EXCH |
1087                 /*
1088                  * We need to set this to allow a later SetPassword
1089                  * via the SAMR pipe to succeed. Strange.... We could
1090                  * also add  NTLMSSP_NEGOTIATE_SEAL here. JRA.
1091                  * */
1092                 NTLMSSP_NEGOTIATE_SIGN |
1093                 NTLMSSP_REQUEST_TARGET;
1094
1095         return NT_STATUS_OK;
1096 }
1097