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_ALWAYS_SIGN) {
 342                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
 343         }
 344
 345         if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
 346                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 347         }
 348
 349         if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
 350                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
 351         }
 352
 353         if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
 354                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
 355         }
 356
 357         if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
 358                 ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
 359         }
 360
 361 }
 362
 363
 364 /**
 365  * Next state function for the Negotiate packet
 366  *
 367  * @param ntlmssp_state NTLMSSP State
 368  * @param request The request, as a DATA_BLOB
 369  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 370  * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
 371  */
 372
 373 static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
 374                                          const DATA_BLOB request, DATA_BLOB *reply)
 375 {
 376         DATA_BLOB struct_blob;
 377         fstring dnsname, dnsdomname;
 378         uint32 neg_flags = 0;
 379         uint32 ntlmssp_command, chal_flags;
 380         char *cliname=NULL, *domname=NULL;
 381         const uint8 *cryptkey;
 382         const char *target_name;
 383
 384         /* parse the NTLMSSP packet */
 385 #if 0
 386         file_save("ntlmssp_negotiate.dat", request.data, request.length);
 387 #endif
 388
 389         if (request.length) {
 390                 if (!msrpc_parse(&request, "CddAA",
 391                                  "NTLMSSP",
 392                                  &ntlmssp_command,
 393                                  &neg_flags,
 394                                  &cliname,
 395                                  &domname)) {
 396                         DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
 397                         dump_data(2, (const char *)request.data, request.length);
 398                         return NT_STATUS_INVALID_PARAMETER;
 399                 }
 400
 401                 SAFE_FREE(cliname);
 402                 SAFE_FREE(domname);
 403
 404                 debug_ntlmssp_flags(neg_flags);
 405         }
 406
 407         ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth());
 408
 409         /* Ask our caller what challenge they would like in the packet */
 410         cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
 411
 412         /* Check if we may set the challenge */
 413         if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
 414                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 415         }
 416
 417         /* The flags we send back are not just the negotiated flags,
 418          * they are also 'what is in this packet'.  Therfore, we
 419          * operate on 'chal_flags' from here on
 420          */
 421
 422         chal_flags = ntlmssp_state->neg_flags;
 423
 424         /* get the right name to fill in as 'target' */
 425         target_name = ntlmssp_target_name(ntlmssp_state,
 426                                           neg_flags, &chal_flags);
 427         if (target_name == NULL)
 428                 return NT_STATUS_INVALID_PARAMETER;
 429
 430         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
 431         ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
 432
 433
 434         /* This should be a 'netbios domain -> DNS domain' mapping */
 435         dnsdomname[0] = '\0';
 436         get_mydomname(dnsdomname);
 437         strlower_m(dnsdomname);
 438
 439         dnsname[0] = '\0';
 440         get_myfullname(dnsname);
 441         strlower_m(dnsname);
 442
 443         /* This creates the 'blob' of names that appears at the end of the packet */
 444         if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
 445         {
 446                 const char *target_name_dns = "";
 447                 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
 448                         target_name_dns = dnsdomname;
 449                 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
 450                         target_name_dns = dnsname;
 451                 }
 452
 453                 msrpc_gen(&struct_blob, "aaaaa",
 454                           NTLMSSP_NAME_TYPE_DOMAIN, target_name,
 455                           NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->get_global_myname(),
 456                           NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
 457                           NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
 458                           0, "");
 459         } else {
 460                 struct_blob = data_blob(NULL, 0);
 461         }
 462
 463         {
 464                 /* Marshel the packet in the right format, be it unicode or ASCII */
 465                 const char *gen_string;
 466                 if (ntlmssp_state->unicode) {
 467                         gen_string = "CdUdbddB";
 468                 } else {
 469                         gen_string = "CdAdbddB";
 470                 }
 471
 472                 msrpc_gen(reply, gen_string,
 473                           "NTLMSSP",
 474                           NTLMSSP_CHALLENGE,
 475                           target_name,
 476                           chal_flags,
 477                           cryptkey, 8,
 478                           0, 0,
 479                           struct_blob.data, struct_blob.length);
 480         }
 481
 482         data_blob_free(&struct_blob);
 483
 484         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 485
 486         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 487 }
 488
 489 /**
 490  * Next state function for the Authenticate packet
 491  *
 492  * @param ntlmssp_state NTLMSSP State
 493  * @param request The request, as a DATA_BLOB
 494  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 495  * @return Errors or NT_STATUS_OK.
 496  */
 497
 498 static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
 499                                     const DATA_BLOB request, DATA_BLOB *reply)
 500 {
 501         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 502         DATA_BLOB nt_session_key = data_blob(NULL, 0);
 503         DATA_BLOB lm_session_key = data_blob(NULL, 0);
 504         DATA_BLOB session_key = data_blob(NULL, 0);
 505         uint32 ntlmssp_command, auth_flags;
 506         NTSTATUS nt_status;
 507
 508         /* used by NTLM2 */
 509         BOOL doing_ntlm2 = False;
 510
 511         uchar session_nonce[16];
 512         uchar session_nonce_hash[16];
 513
 514         const char *parse_string;
 515         char *domain = NULL;
 516         char *user = NULL;
 517         char *workstation = NULL;
 518
 519         /* parse the NTLMSSP packet */
 520         *reply = data_blob(NULL, 0);
 521
 522 #if 0
 523         file_save("ntlmssp_auth.dat", request.data, request.length);
 524 #endif
 525
 526         if (ntlmssp_state->unicode) {
 527                 parse_string = "CdBBUUUBd";
 528         } else {
 529                 parse_string = "CdBBAAABd";
 530         }
 531
 532         data_blob_free(&ntlmssp_state->lm_resp);
 533         data_blob_free(&ntlmssp_state->nt_resp);
 534
 535         ntlmssp_state->user = NULL;
 536         ntlmssp_state->domain = NULL;
 537         ntlmssp_state->workstation = NULL;
 538
 539         /* now the NTLMSSP encoded auth hashes */
 540         if (!msrpc_parse(&request, parse_string,
 541                          "NTLMSSP",
 542                          &ntlmssp_command,
 543                          &ntlmssp_state->lm_resp,
 544                          &ntlmssp_state->nt_resp,
 545                          &domain,
 546                          &user,
 547                          &workstation,
 548                          &encrypted_session_key,
 549                          &auth_flags)) {
 550                 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
 551                 dump_data(2, (const char *)request.data, request.length);
 552                 SAFE_FREE(domain);
 553                 SAFE_FREE(user);
 554                 SAFE_FREE(workstation);
 555                 data_blob_free(&encrypted_session_key);
 556                 auth_flags = 0;
 557
 558                 /* Try again with a shorter string (Win9X truncates this packet) */
 559                 if (ntlmssp_state->unicode) {
 560                         parse_string = "CdBBUUU";
 561                 } else {
 562                         parse_string = "CdBBAAA";
 563                 }
 564
 565                 /* now the NTLMSSP encoded auth hashes */
 566                 if (!msrpc_parse(&request, parse_string,
 567                                  "NTLMSSP",
 568                                  &ntlmssp_command,
 569                                  &ntlmssp_state->lm_resp,
 570                                  &ntlmssp_state->nt_resp,
 571                                  &domain,
 572                                  &user,
 573                                  &workstation)) {
 574                         DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
 575                         dump_data(2, (const char *)request.data, request.length);
 576                         SAFE_FREE(domain);
 577                         SAFE_FREE(user);
 578                         SAFE_FREE(workstation);
 579
 580                         return NT_STATUS_INVALID_PARAMETER;
 581                 }
 582         }
 583
 584         if (auth_flags)
 585                 ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, lp_lanman_auth());
 586
 587         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 588                 SAFE_FREE(domain);
 589                 SAFE_FREE(user);
 590                 SAFE_FREE(workstation);
 591                 data_blob_free(&encrypted_session_key);
 592                 return nt_status;
 593         }
 594
 595         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 596                 SAFE_FREE(domain);
 597                 SAFE_FREE(user);
 598                 SAFE_FREE(workstation);
 599                 data_blob_free(&encrypted_session_key);
 600                 return nt_status;
 601         }
 602
 603         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(ntlmssp_state, workstation))) {
 604                 SAFE_FREE(domain);
 605                 SAFE_FREE(user);
 606                 SAFE_FREE(workstation);
 607                 data_blob_free(&encrypted_session_key);
 608                 return nt_status;
 609         }
 610
 611         SAFE_FREE(domain);
 612         SAFE_FREE(user);
 613         SAFE_FREE(workstation);
 614
 615         DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
 616                  ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, (unsigned long)ntlmssp_state->lm_resp.length, (unsigned long)ntlmssp_state->nt_resp.length));
 617
 618 #if 0
 619         file_save("nthash1.dat",  &ntlmssp_state->nt_resp.data,  &ntlmssp_state->nt_resp.length);
 620         file_save("lmhash1.dat",  &ntlmssp_state->lm_resp.data,  &ntlmssp_state->lm_resp.length);
 621 #endif
 622
 623         /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
 624            client challenge
 625
 626            However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
 627         */
 628         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 629                 if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
 630                         struct MD5Context md5_session_nonce_ctx;
 631                         SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
 632
 633                         doing_ntlm2 = True;
 634
 635                         memcpy(session_nonce, ntlmssp_state->internal_chal.data, 8);
 636                         memcpy(&session_nonce[8], ntlmssp_state->lm_resp.data, 8);
 637
 638                         MD5Init(&md5_session_nonce_ctx);
 639                         MD5Update(&md5_session_nonce_ctx, session_nonce, 16);
 640                         MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 641
 642                         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, session_nonce_hash, 8);
 643
 644                         /* LM response is no longer useful */
 645                         data_blob_free(&ntlmssp_state->lm_resp);
 646
 647                         /* We changed the effective challenge - set it */
 648                         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->set_challenge(ntlmssp_state, &ntlmssp_state->chal))) {
 649                                 data_blob_free(&encrypted_session_key);
 650                                 return nt_status;
 651                         }
 652                 }
 653         }
 654
 655         /*
 656          * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
 657          * is required (by "ntlm auth = no" and "lm auth = no" being set in the
 658          * smb.conf file) and no NTLMv2 response was sent then the password check
 659          * will fail here. JRA.
 660          */
 661
 662         /* Finally, actually ask if the password is OK */
 663
 664         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state,
 665                                                                        &nt_session_key, &lm_session_key))) {
 666                 data_blob_free(&encrypted_session_key);
 667                 return nt_status;
 668         }
 669
 670         dump_data_pw("NT session key:\n", nt_session_key.data, nt_session_key.length);
 671         dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
 672
 673         /* Handle the different session key derivation for NTLM2 */
 674         if (doing_ntlm2) {
 675                 if (nt_session_key.data && nt_session_key.length == 16) {
 676                         session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 677                         hmac_md5(nt_session_key.data, session_nonce,
 678                                  sizeof(session_nonce), session_key.data);
 679                         DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
 680                         dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 681
 682                 } else {
 683                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
 684                         session_key = data_blob(NULL, 0);
 685                 }
 686         } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
 687                 if (lm_session_key.data && lm_session_key.length >= 8) {
 688                         if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
 689                                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 690                                 SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
 691                                                           session_key.data);
 692                                 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
 693                                 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
 694                         } else {
 695                                 /* use the key unmodified - it's
 696                                  * probably a NULL key from the guest
 697                                  * login */
 698                                 session_key = lm_session_key;
 699                         }
 700                 } else {
 701                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
 702                         session_key = data_blob(NULL, 0);
 703                 }
 704         } else if (nt_session_key.data) {
 705                 session_key = nt_session_key;
 706                 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
 707                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 708         } else if (lm_session_key.data) {
 709                 session_key = lm_session_key;
 710                 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
 711                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 712         } else {
 713                 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
 714                 session_key = data_blob(NULL, 0);
 715         }
 716
 717         /* With KEY_EXCH, the client supplies the proposed session key,
 718            but encrypts it with the long-term key */
 719         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
 720                 if (!encrypted_session_key.data || encrypted_session_key.length != 16) {
 721                         data_blob_free(&encrypted_session_key);
 722                         DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
 723                                   encrypted_session_key.length));
 724                         return NT_STATUS_INVALID_PARAMETER;
 725                 } else if (!session_key.data || session_key.length != 16) {
 726                         DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
 727                                   session_key.length));
 728                         ntlmssp_state->session_key = session_key;
 729                 } else {
 730                         dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
 731                         SamOEMhash(encrypted_session_key.data,
 732                                    session_key.data,
 733                                    encrypted_session_key.length);
 734                         ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state->mem_ctx,
 735                                                                       encrypted_session_key.data,
 736                                                                       encrypted_session_key.length);
 737                         dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data,
 738                                      encrypted_session_key.length);
 739                 }
 740         } else {
 741                 ntlmssp_state->session_key = session_key;
 742         }
 743
 744         if (!NT_STATUS_IS_OK(nt_status)) {
 745                 ntlmssp_state->session_key = data_blob(NULL, 0);
 746         } else if (ntlmssp_state->session_key.length) {
 747                 nt_status = ntlmssp_sign_init(ntlmssp_state);
 748         }
 749
 750         data_blob_free(&encrypted_session_key);
 751
 752         /* allow arbitarily many authentications */
 753         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 754
 755         return nt_status;
 756 }
 757
 758 /**
 759  * Create an NTLMSSP state machine
 760  *
 761  * @param ntlmssp_state NTLMSSP State, allocated by this function
 762  */
 763
 764 NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
 765 {
 766         TALLOC_CTX *mem_ctx;
 767
 768         mem_ctx = talloc_init("NTLMSSP context");
 769
 770         *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
 771         if (!*ntlmssp_state) {
 772                 DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
 773                 talloc_destroy(mem_ctx);
 774                 return NT_STATUS_NO_MEMORY;
 775         }
 776
 777         (*ntlmssp_state)->role = NTLMSSP_SERVER;
 778
 779         (*ntlmssp_state)->mem_ctx = mem_ctx;
 780         (*ntlmssp_state)->get_challenge = get_challenge;
 781         (*ntlmssp_state)->set_challenge = set_challenge;
 782         (*ntlmssp_state)->may_set_challenge = may_set_challenge;
 783
 784         (*ntlmssp_state)->get_global_myname = global_myname;
 785         (*ntlmssp_state)->get_domain = lp_workgroup;
 786         (*ntlmssp_state)->server_role = ROLE_DOMAIN_MEMBER; /* a good default */
 787
 788         (*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
 789
 790         (*ntlmssp_state)->ref_count = 1;
 791
 792         (*ntlmssp_state)->neg_flags =
 793                 NTLMSSP_NEGOTIATE_128 |
 794                 NTLMSSP_NEGOTIATE_NTLM |
 795                 NTLMSSP_NEGOTIATE_NTLM2 |
 796                 NTLMSSP_NEGOTIATE_KEY_EXCH |
 797                 NTLMSSP_NEGOTIATE_SIGN;
 798
 799         return NT_STATUS_OK;
 800 }
 801
 802 /*********************************************************************
 803  Client side NTLMSSP
 804 *********************************************************************/
 805
 806 /**
 807  * Next state function for the Initial packet
 808  *
 809  * @param ntlmssp_state NTLMSSP State
 810  * @param request The request, as a DATA_BLOB.  reply.data must be NULL
 811  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 812  * @return Errors or NT_STATUS_OK.
 813  */
 814
 815 static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
 816                                   DATA_BLOB reply, DATA_BLOB *next_request)
 817 {
 818         if (ntlmssp_state->unicode) {
 819                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 820         } else {
 821                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 822         }
 823
 824         if (ntlmssp_state->use_ntlmv2) {
 825                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 826         }
 827
 828         /* generate the ntlmssp negotiate packet */
 829         msrpc_gen(next_request, "CddAA",
 830                   "NTLMSSP",
 831                   NTLMSSP_NEGOTIATE,
 832                   ntlmssp_state->neg_flags,
 833                   ntlmssp_state->get_domain(),
 834                   ntlmssp_state->get_global_myname());
 835
 836         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 837
 838         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 839 }
 840
 841 /**
 842  * Next state function for the Challenge Packet.  Generate an auth packet.
 843  *
 844  * @param ntlmssp_state NTLMSSP State
 845  * @param request The request, as a DATA_BLOB.  reply.data must be NULL
 846  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 847  * @return Errors or NT_STATUS_OK.
 848  */
 849
 850 static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
 851                                          const DATA_BLOB reply, DATA_BLOB *next_request)
 852 {
 853         uint32 chal_flags, ntlmssp_command, unkn1, unkn2;
 854         DATA_BLOB server_domain_blob;
 855         DATA_BLOB challenge_blob;
 856         DATA_BLOB struct_blob = data_blob(NULL, 0);
 857         char *server_domain;
 858         const char *chal_parse_string;
 859         const char *auth_gen_string;
 860         DATA_BLOB lm_response = data_blob(NULL, 0);
 861         DATA_BLOB nt_response = data_blob(NULL, 0);
 862         DATA_BLOB session_key = data_blob(NULL, 0);
 863         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 864         NTSTATUS nt_status;
 865
 866         if (!msrpc_parse(&reply, "CdBd",
 867                          "NTLMSSP",
 868                          &ntlmssp_command,
 869                          &server_domain_blob,
 870                          &chal_flags)) {
 871                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
 872                 dump_data(2, (const char *)reply.data, reply.length);
 873
 874                 return NT_STATUS_INVALID_PARAMETER;
 875         }
 876
 877         data_blob_free(&server_domain_blob);
 878
 879         DEBUG(3, ("Got challenge flags:\n"));
 880         debug_ntlmssp_flags(chal_flags);
 881
 882         ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
 883
 884         if (ntlmssp_state->unicode) {
 885                 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
 886                         chal_parse_string = "CdUdbddB";
 887                 } else {
 888                         chal_parse_string = "CdUdbdd";
 889                 }
 890                 auth_gen_string = "CdBBUUUBd";
 891         } else {
 892                 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
 893                         chal_parse_string = "CdAdbddB";
 894                 } else {
 895                         chal_parse_string = "CdAdbdd";
 896                 }
 897
 898                 auth_gen_string = "CdBBAAABd";
 899         }
 900
 901         DEBUG(3, ("NTLMSSP: Set final flags:\n"));
 902         debug_ntlmssp_flags(ntlmssp_state->neg_flags);
 903
 904         if (!msrpc_parse(&reply, chal_parse_string,
 905                          "NTLMSSP",
 906                          &ntlmssp_command,
 907                          &server_domain,
 908                          &chal_flags,
 909                          &challenge_blob, 8,
 910                          &unkn1, &unkn2,
 911                          &struct_blob)) {
 912                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
 913                 dump_data(2, (const char *)reply.data, reply.length);
 914                 return NT_STATUS_INVALID_PARAMETER;
 915         }
 916
 917         ntlmssp_state->server_domain = talloc_strdup(ntlmssp_state->mem_ctx,
 918                                                      server_domain);
 919
 920         SAFE_FREE(server_domain);
 921         if (challenge_blob.length != 8) {
 922                 data_blob_free(&struct_blob);
 923                 return NT_STATUS_INVALID_PARAMETER;
 924         }
 925
 926         if (!ntlmssp_state->password) {
 927                 static const uchar zeros[16];
 928                 /* do nothing - blobs are zero length */
 929
 930                 /* session key is all zeros */
 931                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, zeros, 16);
 932
 933                 /* not doing NLTM2 without a password */
 934                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 935         } else if (ntlmssp_state->use_ntlmv2) {
 936
 937                 if (!struct_blob.length) {
 938                         /* be lazy, match win2k - we can't do NTLMv2 without it */
 939                         DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
 940                         return NT_STATUS_INVALID_PARAMETER;
 941                 }
 942
 943                 /* TODO: if the remote server is standalone, then we should replace 'domain'
 944                    with the server name as supplied above */
 945
 946                 if (!SMBNTLMv2encrypt(ntlmssp_state->user,
 947                                       ntlmssp_state->domain,
 948                                       ntlmssp_state->password, &challenge_blob,
 949                                       &struct_blob,
 950                                       &lm_response, &nt_response, &session_key)) {
 951                         data_blob_free(&challenge_blob);
 952                         data_blob_free(&struct_blob);
 953                         return NT_STATUS_NO_MEMORY;
 954                 }
 955         } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 956                 struct MD5Context md5_session_nonce_ctx;
 957                 uchar nt_hash[16];
 958                 uchar session_nonce[16];
 959                 uchar session_nonce_hash[16];
 960                 uchar nt_session_key[16];
 961                 E_md4hash(ntlmssp_state->password, nt_hash);
 962
 963                 lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 964                 generate_random_buffer(lm_response.data, 8, False);
 965                 memset(lm_response.data+8, 0, 16);
 966
 967                 memcpy(session_nonce, challenge_blob.data, 8);
 968                 memcpy(&session_nonce[8], lm_response.data, 8);
 969
 970                 MD5Init(&md5_session_nonce_ctx);
 971                 MD5Update(&md5_session_nonce_ctx, challenge_blob.data, 8);
 972                 MD5Update(&md5_session_nonce_ctx, lm_response.data, 8);
 973                 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 974
 975                 DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
 976                 DEBUG(5, ("challenge is: \n"));
 977                 dump_data(5, (const char *)session_nonce_hash, 8);
 978
 979                 nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 980                 SMBNTencrypt(ntlmssp_state->password,
 981                              session_nonce_hash,
 982                              nt_response.data);
 983
 984                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 985
 986                 SMBsesskeygen_ntv1(nt_hash, NULL, nt_session_key);
 987                 hmac_md5(nt_session_key, session_nonce, sizeof(session_nonce), session_key.data);
 988                 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 989         } else {
 990
 991
 992                 uchar lm_hash[16];
 993                 uchar nt_hash[16];
 994                 E_deshash(ntlmssp_state->password, lm_hash);
 995                 E_md4hash(ntlmssp_state->password, nt_hash);
 996
 997                 /* lanman auth is insecure, it may be disabled */
 998                 if (lp_client_lanman_auth()) {
 999                         lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
1000                         SMBencrypt(ntlmssp_state->password,challenge_blob.data,
1001                                    lm_response.data);
1002                 }
1003
1004                 nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
1005                 SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
1006                              nt_response.data);
1007
1008                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
1009                 if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
1010                     && lp_client_lanman_auth()) {
1011                         SMBsesskeygen_lmv1(lm_hash, lm_response.data,
1012                                            session_key.data);
1013                         dump_data_pw("LM session key\n", session_key.data, session_key.length);
1014                 } else {
1015                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
1016                         dump_data_pw("NT session key:\n", session_key.data, session_key.length);
1017                 }
1018         }
1019         data_blob_free(&struct_blob);
1020
1021         /* Key exchange encryptes a new client-generated session key with
1022            the password-derived key */
1023         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
1024                 uint8 client_session_key[16];
1025
1026                 generate_random_buffer(client_session_key, sizeof(client_session_key), False);
1027                 encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key));
1028                 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
1029
1030                 SamOEMhash(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
1031                 data_blob_free(&session_key);
1032                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, client_session_key, sizeof(client_session_key));
1033                 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
1034         }
1035
1036         /* this generates the actual auth packet */
1037         if (!msrpc_gen(next_request, auth_gen_string,
1038                        "NTLMSSP",
1039                        NTLMSSP_AUTH,
1040                        lm_response.data, lm_response.length,
1041                        nt_response.data, nt_response.length,
1042                        ntlmssp_state->domain,
1043                        ntlmssp_state->user,
1044                        ntlmssp_state->get_global_myname(),
1045                        encrypted_session_key.data, encrypted_session_key.length,
1046                        ntlmssp_state->neg_flags)) {
1047
1048                 return NT_STATUS_NO_MEMORY;
1049         }
1050
1051         data_blob_free(&encrypted_session_key);
1052
1053         data_blob_free(&ntlmssp_state->chal);
1054
1055         ntlmssp_state->chal = challenge_blob;
1056         ntlmssp_state->lm_resp = lm_response;
1057         ntlmssp_state->nt_resp = nt_response;
1058         ntlmssp_state->session_key = session_key;
1059
1060         ntlmssp_state->expected_state = NTLMSSP_UNKNOWN;
1061
1062         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_sign_init(ntlmssp_state))) {
1063                 DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n", nt_errstr(nt_status)));
1064                 return nt_status;
1065         }
1066
1067         return NT_STATUS_MORE_PROCESSING_REQUIRED;
1068 }
1069
1070 NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state)
1071 {
1072         TALLOC_CTX *mem_ctx;
1073
1074         mem_ctx = talloc_init("NTLMSSP Client context");
1075
1076         *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
1077         if (!*ntlmssp_state) {
1078                 DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
1079                 talloc_destroy(mem_ctx);
1080                 return NT_STATUS_NO_MEMORY;
1081         }
1082
1083         (*ntlmssp_state)->role = NTLMSSP_CLIENT;
1084
1085         (*ntlmssp_state)->mem_ctx = mem_ctx;
1086
1087         (*ntlmssp_state)->get_global_myname = global_myname;
1088         (*ntlmssp_state)->get_domain = lp_workgroup;
1089
1090         (*ntlmssp_state)->unicode = True;
1091
1092         (*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
1093
1094         (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
1095
1096         (*ntlmssp_state)->ref_count = 1;
1097
1098         (*ntlmssp_state)->neg_flags =
1099                 NTLMSSP_NEGOTIATE_128 |
1100                 NTLMSSP_NEGOTIATE_NTLM |
1101                 NTLMSSP_NEGOTIATE_NTLM2 |
1102                 NTLMSSP_NEGOTIATE_KEY_EXCH |
1103                 /*
1104                  * We need to set this to allow a later SetPassword
1105                  * via the SAMR pipe to succeed. Strange.... We could
1106                  * also add  NTLMSSP_NEGOTIATE_SEAL here. JRA.
1107                  * */
1108                 NTLMSSP_NEGOTIATE_SIGN |
1109                 NTLMSSP_REQUEST_TARGET;
1110
1111         return NT_STATUS_OK;
1112 }
1113