source4/auth/gensec/spnego.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    RFC2478 Compliant SPNEGO implementation
   5
   6    Copyright (C) Jim McDonough <jmcd@us.ibm.com>      2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   8    Copyright (C) Stefan Metzmacher <metze@samba.org>  2004-2008
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "auth/gensec/spnego.h"
  27 #include "librpc/gen_ndr/ndr_dcerpc.h"
  28 #include "auth/credentials/credentials.h"
  29 #include "auth/gensec/gensec.h"
  30 #include "auth/gensec/gensec_proto.h"
  31
  32 enum spnego_state_position {
  33         SPNEGO_SERVER_START,
  34         SPNEGO_CLIENT_START,
  35         SPNEGO_SERVER_TARG,
  36         SPNEGO_CLIENT_TARG,
  37         SPNEGO_FALLBACK,
  38         SPNEGO_DONE
  39 };
  40
  41 struct spnego_state {
  42         enum spnego_message_type expected_packet;
  43         enum spnego_state_position state_position;
  44         struct gensec_security *sub_sec_security;
  45         bool no_response_expected;
  46
  47         const char *neg_oid;
  48
  49         DATA_BLOB mech_types;
  50 };
  51
  52
  53 static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_security)
  54 {
  55         struct spnego_state *spnego_state;
  56
  57         spnego_state = talloc(gensec_security, struct spnego_state);
  58         if (!spnego_state) {
  59                 return NT_STATUS_NO_MEMORY;
  60         }
  61
  62         spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
  63         spnego_state->state_position = SPNEGO_CLIENT_START;
  64         spnego_state->sub_sec_security = NULL;
  65         spnego_state->no_response_expected = false;
  66         spnego_state->mech_types = data_blob(NULL, 0);
  67
  68         gensec_security->private_data = spnego_state;
  69         return NT_STATUS_OK;
  70 }
  71
  72 static NTSTATUS gensec_spnego_server_start(struct gensec_security *gensec_security)
  73 {
  74         struct spnego_state *spnego_state;
  75
  76         spnego_state = talloc(gensec_security, struct spnego_state);
  77         if (!spnego_state) {
  78                 return NT_STATUS_NO_MEMORY;
  79         }
  80
  81         spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
  82         spnego_state->state_position = SPNEGO_SERVER_START;
  83         spnego_state->sub_sec_security = NULL;
  84         spnego_state->no_response_expected = false;
  85         spnego_state->mech_types = data_blob(NULL, 0);
  86
  87         gensec_security->private_data = spnego_state;
  88         return NT_STATUS_OK;
  89 }
  90
  91 /*
  92   wrappers for the spnego_*() functions
  93 */
  94 static NTSTATUS gensec_spnego_unseal_packet(struct gensec_security *gensec_security,
  95                                             TALLOC_CTX *mem_ctx,
  96                                             uint8_t *data, size_t length,
  97                                             const uint8_t *whole_pdu, size_t pdu_length,
  98                                             const DATA_BLOB *sig)
  99 {
 100         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 101
 102         if (spnego_state->state_position != SPNEGO_DONE
 103             && spnego_state->state_position != SPNEGO_FALLBACK) {
 104                 return NT_STATUS_INVALID_PARAMETER;
 105         }
 106
 107         return gensec_unseal_packet(spnego_state->sub_sec_security,
 108                                     mem_ctx,
 109                                     data, length,
 110                                     whole_pdu, pdu_length,
 111                                     sig);
 112 }
 113
 114 static NTSTATUS gensec_spnego_check_packet(struct gensec_security *gensec_security,
 115                                            TALLOC_CTX *mem_ctx,
 116                                            const uint8_t *data, size_t length,
 117                                            const uint8_t *whole_pdu, size_t pdu_length,
 118                                            const DATA_BLOB *sig)
 119 {
 120         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 121
 122         if (spnego_state->state_position != SPNEGO_DONE
 123             && spnego_state->state_position != SPNEGO_FALLBACK) {
 124                 return NT_STATUS_INVALID_PARAMETER;
 125         }
 126
 127         return gensec_check_packet(spnego_state->sub_sec_security,
 128                                    mem_ctx,
 129                                    data, length,
 130                                    whole_pdu, pdu_length,
 131                                    sig);
 132 }
 133
 134 static NTSTATUS gensec_spnego_seal_packet(struct gensec_security *gensec_security,
 135                                           TALLOC_CTX *mem_ctx,
 136                                           uint8_t *data, size_t length,
 137                                           const uint8_t *whole_pdu, size_t pdu_length,
 138                                           DATA_BLOB *sig)
 139 {
 140         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 141
 142         if (spnego_state->state_position != SPNEGO_DONE
 143             && spnego_state->state_position != SPNEGO_FALLBACK) {
 144                 return NT_STATUS_INVALID_PARAMETER;
 145         }
 146
 147         return gensec_seal_packet(spnego_state->sub_sec_security,
 148                                   mem_ctx,
 149                                   data, length,
 150                                   whole_pdu, pdu_length,
 151                                   sig);
 152 }
 153
 154 static NTSTATUS gensec_spnego_sign_packet(struct gensec_security *gensec_security,
 155                                           TALLOC_CTX *mem_ctx,
 156                                           const uint8_t *data, size_t length,
 157                                           const uint8_t *whole_pdu, size_t pdu_length,
 158                                           DATA_BLOB *sig)
 159 {
 160         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 161
 162         if (spnego_state->state_position != SPNEGO_DONE
 163             && spnego_state->state_position != SPNEGO_FALLBACK) {
 164                 return NT_STATUS_INVALID_PARAMETER;
 165         }
 166
 167         return gensec_sign_packet(spnego_state->sub_sec_security,
 168                                   mem_ctx,
 169                                   data, length,
 170                                   whole_pdu, pdu_length,
 171                                   sig);
 172 }
 173
 174 static NTSTATUS gensec_spnego_wrap(struct gensec_security *gensec_security,
 175                                    TALLOC_CTX *mem_ctx,
 176                                    const DATA_BLOB *in,
 177                                    DATA_BLOB *out)
 178 {
 179         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 180
 181         if (spnego_state->state_position != SPNEGO_DONE
 182             && spnego_state->state_position != SPNEGO_FALLBACK) {
 183                 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
 184                 return NT_STATUS_INVALID_PARAMETER;
 185         }
 186
 187         return gensec_wrap(spnego_state->sub_sec_security,
 188                            mem_ctx, in, out);
 189 }
 190
 191 static NTSTATUS gensec_spnego_unwrap(struct gensec_security *gensec_security,
 192                                      TALLOC_CTX *mem_ctx,
 193                                      const DATA_BLOB *in,
 194                                      DATA_BLOB *out)
 195 {
 196         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 197
 198         if (spnego_state->state_position != SPNEGO_DONE
 199             && spnego_state->state_position != SPNEGO_FALLBACK) {
 200                 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
 201                 return NT_STATUS_INVALID_PARAMETER;
 202         }
 203
 204         return gensec_unwrap(spnego_state->sub_sec_security,
 205                              mem_ctx, in, out);
 206 }
 207
 208 static NTSTATUS gensec_spnego_wrap_packets(struct gensec_security *gensec_security,
 209                                            TALLOC_CTX *mem_ctx,
 210                                            const DATA_BLOB *in,
 211                                            DATA_BLOB *out,
 212                                            size_t *len_processed)
 213 {
 214         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 215
 216         if (spnego_state->state_position != SPNEGO_DONE
 217             && spnego_state->state_position != SPNEGO_FALLBACK) {
 218                 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
 219                 return NT_STATUS_INVALID_PARAMETER;
 220         }
 221
 222         return gensec_wrap_packets(spnego_state->sub_sec_security,
 223                                    mem_ctx, in, out,
 224                                    len_processed);
 225 }
 226
 227 static NTSTATUS gensec_spnego_packet_full_request(struct gensec_security *gensec_security,
 228                                                 DATA_BLOB blob, size_t *size)
 229 {
 230         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 231
 232         if (spnego_state->state_position != SPNEGO_DONE
 233             && spnego_state->state_position != SPNEGO_FALLBACK) {
 234                 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
 235                 return NT_STATUS_INVALID_PARAMETER;
 236         }
 237
 238         return gensec_packet_full_request(spnego_state->sub_sec_security,
 239                                           blob, size);
 240 }
 241
 242 static NTSTATUS gensec_spnego_unwrap_packets(struct gensec_security *gensec_security,
 243                                              TALLOC_CTX *mem_ctx,
 244                                              const DATA_BLOB *in,
 245                                              DATA_BLOB *out,
 246                                              size_t *len_processed)
 247 {
 248         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 249
 250         if (spnego_state->state_position != SPNEGO_DONE
 251             && spnego_state->state_position != SPNEGO_FALLBACK) {
 252                 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
 253                 return NT_STATUS_INVALID_PARAMETER;
 254         }
 255
 256         return gensec_unwrap_packets(spnego_state->sub_sec_security,
 257                                      mem_ctx, in, out,
 258                                      len_processed);
 259 }
 260
 261 static size_t gensec_spnego_sig_size(struct gensec_security *gensec_security, size_t data_size)
 262 {
 263         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 264
 265         if (spnego_state->state_position != SPNEGO_DONE
 266             && spnego_state->state_position != SPNEGO_FALLBACK) {
 267                 return 0;
 268         }
 269
 270         return gensec_sig_size(spnego_state->sub_sec_security, data_size);
 271 }
 272
 273 static size_t gensec_spnego_max_input_size(struct gensec_security *gensec_security)
 274 {
 275         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 276
 277         if (spnego_state->state_position != SPNEGO_DONE
 278             && spnego_state->state_position != SPNEGO_FALLBACK) {
 279                 return 0;
 280         }
 281
 282         return gensec_max_input_size(spnego_state->sub_sec_security);
 283 }
 284
 285 static size_t gensec_spnego_max_wrapped_size(struct gensec_security *gensec_security)
 286 {
 287         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 288
 289         if (spnego_state->state_position != SPNEGO_DONE
 290             && spnego_state->state_position != SPNEGO_FALLBACK) {
 291                 return 0;
 292         }
 293
 294         return gensec_max_wrapped_size(spnego_state->sub_sec_security);
 295 }
 296
 297 static NTSTATUS gensec_spnego_session_key(struct gensec_security *gensec_security,
 298                                           DATA_BLOB *session_key)
 299 {
 300         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 301         if (!spnego_state->sub_sec_security) {
 302                 return NT_STATUS_INVALID_PARAMETER;
 303         }
 304
 305         return gensec_session_key(spnego_state->sub_sec_security,
 306                                   session_key);
 307 }
 308
 309 static NTSTATUS gensec_spnego_session_info(struct gensec_security *gensec_security,
 310                                                                       struct auth_session_info **session_info)
 311 {
 312         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 313         if (!spnego_state->sub_sec_security) {
 314                 return NT_STATUS_INVALID_PARAMETER;
 315         }
 316
 317         return gensec_session_info(spnego_state->sub_sec_security,
 318                                    session_info);
 319 }
 320
 321 /** Fallback to another GENSEC mechanism, based on magic strings
 322  *
 323  * This is the 'fallback' case, where we don't get SPNEGO, and have to
 324  * try all the other options (and hope they all have a magic string
 325  * they check)
 326 */
 327
 328 static NTSTATUS gensec_spnego_server_try_fallback(struct gensec_security *gensec_security,
 329                                                   struct spnego_state *spnego_state,
 330                                                   TALLOC_CTX *out_mem_ctx,
 331                                                   const DATA_BLOB in, DATA_BLOB *out)
 332 {
 333         int i,j;
 334         struct gensec_security_ops **all_ops
 335                 = gensec_security_mechs(gensec_security, out_mem_ctx);
 336         for (i=0; all_ops[i]; i++) {
 337                 bool is_spnego;
 338                 NTSTATUS nt_status;
 339                 if (!all_ops[i]->oid) {
 340                         continue;
 341                 }
 342
 343                 is_spnego = false;
 344                 for (j=0; all_ops[i]->oid[j]; j++) {
 345                         if (strcasecmp(GENSEC_OID_SPNEGO,all_ops[i]->oid[j]) == 0) {
 346                                 is_spnego = true;
 347                         }
 348                 }
 349                 if (is_spnego) {
 350                         continue;
 351                 }
 352
 353                 if (!all_ops[i]->magic) {
 354                         continue;
 355                 }
 356
 357                 nt_status = all_ops[i]->magic(gensec_security, &in);
 358                 if (!NT_STATUS_IS_OK(nt_status)) {
 359                         continue;
 360                 }
 361
 362                 spnego_state->state_position = SPNEGO_FALLBACK;
 363
 364                 nt_status = gensec_subcontext_start(spnego_state,
 365                                                     gensec_security,
 366                                                     &spnego_state->sub_sec_security);
 367
 368                 if (!NT_STATUS_IS_OK(nt_status)) {
 369                         return nt_status;
 370                 }
 371                 /* select the sub context */
 372                 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
 373                                                      all_ops[i]);
 374                 if (!NT_STATUS_IS_OK(nt_status)) {
 375                         return nt_status;
 376                 }
 377                 nt_status = gensec_update(spnego_state->sub_sec_security,
 378                                           out_mem_ctx, in, out);
 379                 return nt_status;
 380         }
 381         DEBUG(1, ("Failed to parse SPNEGO request\n"));
 382         return NT_STATUS_INVALID_PARAMETER;
 383
 384 }
 385
 386 /*
 387    Parse the netTokenInit, either from the client, to the server, or
 388    from the server to the client.
 389 */
 390
 391 static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_security,
 392                                                  struct spnego_state *spnego_state,
 393                                                  TALLOC_CTX *out_mem_ctx,
 394                                                  const char **mechType,
 395                                                  const DATA_BLOB unwrapped_in, DATA_BLOB *unwrapped_out)
 396 {
 397         int i;
 398         NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
 399         DATA_BLOB null_data_blob = data_blob(NULL,0);
 400         bool ok;
 401
 402         const struct gensec_security_ops_wrapper *all_sec
 403                 = gensec_security_by_oid_list(gensec_security,
 404                                               out_mem_ctx,
 405                                               mechType,
 406                                               GENSEC_OID_SPNEGO);
 407
 408         ok = spnego_write_mech_types(spnego_state,
 409                                      mechType,
 410                                      &spnego_state->mech_types);
 411         if (!ok) {
 412                 DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
 413                 return NT_STATUS_NO_MEMORY;
 414         }
 415
 416         if (spnego_state->state_position == SPNEGO_SERVER_START) {
 417                 for (i=0; all_sec && all_sec[i].op; i++) {
 418                         /* optomisitic token */
 419                         if (strcmp(all_sec[i].oid, mechType[0]) == 0) {
 420                                 nt_status = gensec_subcontext_start(spnego_state,
 421                                                                     gensec_security,
 422                                                                     &spnego_state->sub_sec_security);
 423                                 if (!NT_STATUS_IS_OK(nt_status)) {
 424                                         return nt_status;
 425                                 }
 426                                 /* select the sub context */
 427                                 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
 428                                                                      all_sec[i].op);
 429                                 if (!NT_STATUS_IS_OK(nt_status)) {
 430                                         talloc_free(spnego_state->sub_sec_security);
 431                                         spnego_state->sub_sec_security = NULL;
 432                                         break;
 433                                 }
 434
 435                                 nt_status = gensec_update(spnego_state->sub_sec_security,
 436                                                           out_mem_ctx,
 437                                                           unwrapped_in,
 438                                                           unwrapped_out);
 439                                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
 440                                     NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
 441                                         /* Pretend we never started it (lets the first run find some incompatible demand) */
 442
 443                                         DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
 444                                                   spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
 445                                         talloc_free(spnego_state->sub_sec_security);
 446                                         spnego_state->sub_sec_security = NULL;
 447                                         break;
 448                                 }
 449
 450                                 spnego_state->neg_oid = all_sec[i].oid;
 451                                 break;
 452                         }
 453                 }
 454         }
 455
 456         /* Having tried any optomisitc token from the client (if we
 457          * were the server), if we didn't get anywhere, walk our list
 458          * in our preference order */
 459
 460         if (!spnego_state->sub_sec_security) {
 461                 for (i=0; all_sec && all_sec[i].op; i++) {
 462                         nt_status = gensec_subcontext_start(spnego_state,
 463                                                             gensec_security,
 464                                                             &spnego_state->sub_sec_security);
 465                         if (!NT_STATUS_IS_OK(nt_status)) {
 466                                 return nt_status;
 467                         }
 468                         /* select the sub context */
 469                         nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
 470                                                              all_sec[i].op);
 471                         if (!NT_STATUS_IS_OK(nt_status)) {
 472                                 talloc_free(spnego_state->sub_sec_security);
 473                                 spnego_state->sub_sec_security = NULL;
 474                                 continue;
 475                         }
 476
 477                         spnego_state->neg_oid = all_sec[i].oid;
 478
 479                         /* only get the helping start blob for the first OID */
 480                         nt_status = gensec_update(spnego_state->sub_sec_security,
 481                                                   out_mem_ctx,
 482                                                   null_data_blob,
 483                                                   unwrapped_out);
 484
 485                         /* it is likely that a NULL input token will
 486                          * not be liked by most server mechs, but if
 487                          * we are in the client, we want the first
 488                          * update packet to be able to abort the use
 489                          * of this mech */
 490                         if (spnego_state->state_position != SPNEGO_SERVER_START) {
 491                                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
 492                                     NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
 493                                         /* Pretend we never started it (lets the first run find some incompatible demand) */
 494
 495                                         DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse: %s\n",
 496                                                   spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
 497                                         talloc_free(spnego_state->sub_sec_security);
 498                                         spnego_state->sub_sec_security = NULL;
 499                                         continue;
 500                                 }
 501                         }
 502
 503                         break;
 504                 }
 505         }
 506
 507         if (spnego_state->sub_sec_security) {
 508                 /* it is likely that a NULL input token will
 509                  * not be liked by most server mechs, but this
 510                  * does the right thing in the CIFS client.
 511                  * just push us along the merry-go-round
 512                  * again, and hope for better luck next
 513                  * time */
 514
 515                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
 516                         *unwrapped_out = data_blob(NULL, 0);
 517                         nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
 518                 }
 519
 520                 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)
 521                     && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
 522                     && !NT_STATUS_IS_OK(nt_status)) {
 523                         DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
 524                                   spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
 525                         talloc_free(spnego_state->sub_sec_security);
 526                         spnego_state->sub_sec_security = NULL;
 527
 528                         /* We started the mech correctly, and the
 529                          * input from the other side was valid.
 530                          * Return the error (say bad password, invalid
 531                          * ticket) */
 532                         return nt_status;
 533                 }
 534
 535
 536                 return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
 537         }
 538
 539         DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
 540         /* we could re-negotiate here, but it would only work
 541          * if the client or server lied about what it could
 542          * support the first time.  Lets keep this code to
 543          * reality */
 544
 545         return nt_status;
 546 }
 547
 548 /** create a negTokenInit
 549  *
 550  * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
 551 */
 552 static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
 553                                                   struct spnego_state *spnego_state,
 554                                                   TALLOC_CTX *out_mem_ctx,
 555                                                   const DATA_BLOB in, DATA_BLOB *out)
 556 {
 557         int i;
 558         NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
 559         DATA_BLOB null_data_blob = data_blob(NULL,0);
 560         const char **mechTypes = NULL;
 561         DATA_BLOB unwrapped_out = data_blob(NULL, 0);
 562         const struct gensec_security_ops_wrapper *all_sec;
 563         const char *principal = NULL;
 564
 565         mechTypes = gensec_security_oids(gensec_security,
 566                                          out_mem_ctx, GENSEC_OID_SPNEGO);
 567
 568         all_sec = gensec_security_by_oid_list(gensec_security,
 569                                               out_mem_ctx,
 570                                               mechTypes,
 571                                               GENSEC_OID_SPNEGO);
 572         for (i=0; all_sec && all_sec[i].op; i++) {
 573                 struct spnego_data spnego_out;
 574                 const char **send_mech_types;
 575                 bool ok;
 576
 577                 nt_status = gensec_subcontext_start(spnego_state,
 578                                                     gensec_security,
 579                                                     &spnego_state->sub_sec_security);
 580                 if (!NT_STATUS_IS_OK(nt_status)) {
 581                         return nt_status;
 582                 }
 583                 /* select the sub context */
 584                 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
 585                                                      all_sec[i].op);
 586                 if (!NT_STATUS_IS_OK(nt_status)) {
 587                         talloc_free(spnego_state->sub_sec_security);
 588                         spnego_state->sub_sec_security = NULL;
 589                         continue;
 590                 }
 591
 592                 /* In the client, try and produce the first (optimistic) packet */
 593                 if (spnego_state->state_position == SPNEGO_CLIENT_START) {
 594                         nt_status = gensec_update(spnego_state->sub_sec_security,
 595                                                   out_mem_ctx,
 596                                                   null_data_blob,
 597                                                   &unwrapped_out);
 598
 599                         if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
 600                             && !NT_STATUS_IS_OK(nt_status)) {
 601                                 DEBUG(1, ("SPNEGO(%s) creating NEG_TOKEN_INIT failed: %s\n",
 602                                           spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
 603                                 talloc_free(spnego_state->sub_sec_security);
 604                                 spnego_state->sub_sec_security = NULL;
 605                                 /* Pretend we never started it (lets the first run find some incompatible demand) */
 606
 607                                 continue;
 608                         }
 609                 }
 610
 611                 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
 612
 613                 send_mech_types = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
 614                                                                         &all_sec[i]);
 615
 616                 ok = spnego_write_mech_types(spnego_state,
 617                                              send_mech_types,
 618                                              &spnego_state->mech_types);
 619                 if (!ok) {
 620                         DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
 621                         return NT_STATUS_NO_MEMORY;
 622                 }
 623
 624                 /* List the remaining mechs as options */
 625                 spnego_out.negTokenInit.mechTypes = send_mech_types;
 626                 spnego_out.negTokenInit.reqFlags = 0;
 627
 628                 if (spnego_state->state_position == SPNEGO_SERVER_START) {
 629                         /* server credentials */
 630                         struct cli_credentials *creds = gensec_get_credentials(gensec_security);
 631                         if (creds) {
 632                                 principal = cli_credentials_get_principal(creds, out_mem_ctx);
 633                         }
 634                 }
 635                 if (principal) {
 636                         spnego_out.negTokenInit.mechListMIC
 637                                 = data_blob_string_const(principal);
 638                 } else {
 639                         spnego_out.negTokenInit.mechListMIC = null_data_blob;
 640                 }
 641
 642                 spnego_out.negTokenInit.mechToken = unwrapped_out;
 643
 644                 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
 645                         DEBUG(1, ("Failed to write NEG_TOKEN_INIT\n"));
 646                                 return NT_STATUS_INVALID_PARAMETER;
 647                 }
 648
 649                 /* set next state */
 650                 spnego_state->neg_oid = all_sec[i].oid;
 651
 652                 if (NT_STATUS_IS_OK(nt_status)) {
 653                         spnego_state->no_response_expected = true;
 654                 }
 655
 656                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 657         }
 658         talloc_free(spnego_state->sub_sec_security);
 659         spnego_state->sub_sec_security = NULL;
 660
 661         DEBUG(1, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
 662         return NT_STATUS_INVALID_PARAMETER;
 663 }
 664
 665
 666 /** create a server negTokenTarg
 667  *
 668  * This is the case, where the client is the first one who sends data
 669 */
 670
 671 static NTSTATUS gensec_spnego_server_negTokenTarg(struct gensec_security *gensec_security,
 672                                                   struct spnego_state *spnego_state,
 673                                                   TALLOC_CTX *out_mem_ctx,
 674                                                   NTSTATUS nt_status,
 675                                                   const DATA_BLOB unwrapped_out,
 676                                                   DATA_BLOB mech_list_mic,
 677                                                   DATA_BLOB *out)
 678 {
 679         struct spnego_data spnego_out;
 680         DATA_BLOB null_data_blob = data_blob(NULL, 0);
 681
 682         /* compose reply */
 683         spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
 684         spnego_out.negTokenTarg.responseToken = unwrapped_out;
 685         spnego_out.negTokenTarg.mechListMIC = null_data_blob;
 686         spnego_out.negTokenTarg.supportedMech = NULL;
 687
 688         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 689                 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
 690                 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
 691                 spnego_state->state_position = SPNEGO_SERVER_TARG;
 692         } else if (NT_STATUS_IS_OK(nt_status)) {
 693                 if (unwrapped_out.data) {
 694                         spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
 695                 }
 696                 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
 697                 spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
 698                 spnego_state->state_position = SPNEGO_DONE;
 699         } else {
 700                 spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
 701                 DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
 702                 spnego_state->state_position = SPNEGO_DONE;
 703         }
 704
 705         if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
 706                 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
 707                 return NT_STATUS_INVALID_PARAMETER;
 708         }
 709
 710         spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
 711
 712         return nt_status;
 713 }
 714
 715
 716 static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
 717                                      const DATA_BLOB in, DATA_BLOB *out)
 718 {
 719         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
 720         DATA_BLOB null_data_blob = data_blob(NULL, 0);
 721         DATA_BLOB mech_list_mic = data_blob(NULL, 0);
 722         DATA_BLOB unwrapped_out = data_blob(NULL, 0);
 723         struct spnego_data spnego_out;
 724         struct spnego_data spnego;
 725
 726         ssize_t len;
 727
 728         *out = data_blob(NULL, 0);
 729
 730         if (!out_mem_ctx) {
 731                 out_mem_ctx = spnego_state;
 732         }
 733
 734         /* and switch into the state machine */
 735
 736         switch (spnego_state->state_position) {
 737         case SPNEGO_FALLBACK:
 738                 return gensec_update(spnego_state->sub_sec_security,
 739                                      out_mem_ctx, in, out);
 740         case SPNEGO_SERVER_START:
 741         {
 742                 NTSTATUS nt_status;
 743                 if (in.length) {
 744
 745                         len = spnego_read_data(gensec_security, in, &spnego);
 746                         if (len == -1) {
 747                                 return gensec_spnego_server_try_fallback(gensec_security, spnego_state,
 748                                                                          out_mem_ctx, in, out);
 749                         }
 750                         /* client sent NegTargetInit, we send NegTokenTarg */
 751
 752                         /* OK, so it's real SPNEGO, check the packet's the one we expect */
 753                         if (spnego.type != spnego_state->expected_packet) {
 754                                 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
 755                                           spnego_state->expected_packet));
 756                                 dump_data(1, in.data, in.length);
 757                                 spnego_free_data(&spnego);
 758                                 return NT_STATUS_INVALID_PARAMETER;
 759                         }
 760
 761                         nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
 762                                                                      spnego_state,
 763                                                                      out_mem_ctx,
 764                                                                      spnego.negTokenInit.mechTypes,
 765                                                                      spnego.negTokenInit.mechToken,
 766                                                                      &unwrapped_out);
 767
 768                         nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
 769                                                                       spnego_state,
 770                                                                       out_mem_ctx,
 771                                                                       nt_status,
 772                                                                       unwrapped_out,
 773                                                                       null_data_blob,
 774                                                                       out);
 775
 776                         spnego_free_data(&spnego);
 777
 778                         return nt_status;
 779                 } else {
 780                         nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
 781                                                                       out_mem_ctx, in, out);
 782                         spnego_state->state_position = SPNEGO_SERVER_START;
 783                         spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
 784                         return nt_status;
 785                 }
 786         }
 787
 788         case SPNEGO_CLIENT_START:
 789         {
 790                 /* The server offers a list of mechanisms */
 791
 792                 const char *my_mechs[] = {NULL, NULL};
 793                 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
 794
 795                 if (!in.length) {
 796                         /* client to produce negTokenInit */
 797                         nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
 798                                                                  out_mem_ctx, in, out);
 799                         spnego_state->state_position = SPNEGO_CLIENT_TARG;
 800                         spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
 801                         return nt_status;
 802                 }
 803
 804                 len = spnego_read_data(gensec_security, in, &spnego);
 805
 806                 if (len == -1) {
 807                         DEBUG(1, ("Invalid SPNEGO request:\n"));
 808                         dump_data(1, in.data, in.length);
 809                         return NT_STATUS_INVALID_PARAMETER;
 810                 }
 811
 812                 /* OK, so it's real SPNEGO, check the packet's the one we expect */
 813                 if (spnego.type != spnego_state->expected_packet) {
 814                         DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
 815                                   spnego_state->expected_packet));
 816                         dump_data(1, in.data, in.length);
 817                         spnego_free_data(&spnego);
 818                         return NT_STATUS_INVALID_PARAMETER;
 819                 }
 820
 821                 if (spnego.negTokenInit.targetPrincipal) {
 822                         DEBUG(5, ("Server claims it's principal name is %s\n", spnego.negTokenInit.targetPrincipal));
 823                         gensec_set_target_principal(gensec_security, spnego.negTokenInit.targetPrincipal);
 824                 }
 825
 826                 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
 827                                                              spnego_state,
 828                                                              out_mem_ctx,
 829                                                              spnego.negTokenInit.mechTypes,
 830                                                              spnego.negTokenInit.mechToken,
 831                                                              &unwrapped_out);
 832
 833                 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
 834                         spnego_free_data(&spnego);
 835                         return nt_status;
 836                 }
 837
 838                 my_mechs[0] = spnego_state->neg_oid;
 839                 /* compose reply */
 840                 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
 841                 spnego_out.negTokenInit.mechTypes = my_mechs;
 842                 spnego_out.negTokenInit.reqFlags = 0;
 843                 spnego_out.negTokenInit.mechListMIC = null_data_blob;
 844                 spnego_out.negTokenInit.mechToken = unwrapped_out;
 845
 846                 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
 847                         DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n"));
 848                                 return NT_STATUS_INVALID_PARAMETER;
 849                 }
 850
 851                 /* set next state */
 852                 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
 853                 spnego_state->state_position = SPNEGO_CLIENT_TARG;
 854
 855                 if (NT_STATUS_IS_OK(nt_status)) {
 856                         spnego_state->no_response_expected = true;
 857                 }
 858
 859                 spnego_free_data(&spnego);
 860                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 861         }
 862         case SPNEGO_SERVER_TARG:
 863         {
 864                 NTSTATUS nt_status;
 865                 bool new_spnego = false;
 866
 867                 if (!in.length) {
 868                         return NT_STATUS_INVALID_PARAMETER;
 869                 }
 870
 871                 len = spnego_read_data(gensec_security, in, &spnego);
 872
 873                 if (len == -1) {
 874                         DEBUG(1, ("Invalid SPNEGO request:\n"));
 875                         dump_data(1, in.data, in.length);
 876                         return NT_STATUS_INVALID_PARAMETER;
 877                 }
 878
 879                 /* OK, so it's real SPNEGO, check the packet's the one we expect */
 880                 if (spnego.type != spnego_state->expected_packet) {
 881                         DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
 882                                   spnego_state->expected_packet));
 883                         dump_data(1, in.data, in.length);
 884                         spnego_free_data(&spnego);
 885                         return NT_STATUS_INVALID_PARAMETER;
 886                 }
 887
 888                 if (!spnego_state->sub_sec_security) {
 889                         DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
 890                         spnego_free_data(&spnego);
 891                         return NT_STATUS_INVALID_PARAMETER;
 892                 }
 893
 894                 nt_status = gensec_update(spnego_state->sub_sec_security,
 895                                           out_mem_ctx,
 896                                           spnego.negTokenTarg.responseToken,
 897                                           &unwrapped_out);
 898                 if (NT_STATUS_IS_OK(nt_status) && spnego.negTokenTarg.mechListMIC.length > 0) {
 899                         new_spnego = true;
 900                         nt_status = gensec_check_packet(spnego_state->sub_sec_security,
 901                                                         out_mem_ctx,
 902                                                         spnego_state->mech_types.data,
 903                                                         spnego_state->mech_types.length,
 904                                                         spnego_state->mech_types.data,
 905                                                         spnego_state->mech_types.length,
 906                                                         &spnego.negTokenTarg.mechListMIC);
 907                         if (!NT_STATUS_IS_OK(nt_status)) {
 908                                 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
 909                                         nt_errstr(nt_status)));
 910                         }
 911                 }
 912                 if (NT_STATUS_IS_OK(nt_status) && new_spnego) {
 913                         nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
 914                                                        out_mem_ctx,
 915                                                        spnego_state->mech_types.data,
 916                                                        spnego_state->mech_types.length,
 917                                                        spnego_state->mech_types.data,
 918                                                        spnego_state->mech_types.length,
 919                                                        &mech_list_mic);
 920                         if (!NT_STATUS_IS_OK(nt_status)) {
 921                                 DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
 922                                         nt_errstr(nt_status)));
 923                         }
 924                 }
 925
 926                 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
 927                                                               spnego_state,
 928                                                               out_mem_ctx,
 929                                                               nt_status,
 930                                                               unwrapped_out,
 931                                                               mech_list_mic,
 932                                                               out);
 933
 934                 spnego_free_data(&spnego);
 935
 936                 return nt_status;
 937         }
 938         case SPNEGO_CLIENT_TARG:
 939         {
 940                 NTSTATUS nt_status;
 941                 if (!in.length) {
 942                         return NT_STATUS_INVALID_PARAMETER;
 943                 }
 944
 945                 len = spnego_read_data(gensec_security, in, &spnego);
 946
 947                 if (len == -1) {
 948                         DEBUG(1, ("Invalid SPNEGO request:\n"));
 949                         dump_data(1, in.data, in.length);
 950                         return NT_STATUS_INVALID_PARAMETER;
 951                 }
 952
 953                 /* OK, so it's real SPNEGO, check the packet's the one we expect */
 954                 if (spnego.type != spnego_state->expected_packet) {
 955                         DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
 956                                   spnego_state->expected_packet));
 957                         dump_data(1, in.data, in.length);
 958                         spnego_free_data(&spnego);
 959                         return NT_STATUS_INVALID_PARAMETER;
 960                 }
 961
 962                 if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
 963                         spnego_free_data(&spnego);
 964                         return NT_STATUS_ACCESS_DENIED;
 965                 }
 966
 967                 /* Server didn't like our choice of mech, and chose something else */
 968                 if ((spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_INCOMPLETE) &&
 969                     spnego.negTokenTarg.supportedMech &&
 970                     strcmp(spnego.negTokenTarg.supportedMech, spnego_state->neg_oid) != 0) {
 971                         DEBUG(3,("GENSEC SPNEGO: client preferred mech (%s) not accepted, server wants: %s\n",
 972                                  gensec_get_name_by_oid(spnego.negTokenTarg.supportedMech),
 973                                  gensec_get_name_by_oid(spnego_state->neg_oid)));
 974
 975                         talloc_free(spnego_state->sub_sec_security);
 976                         nt_status = gensec_subcontext_start(spnego_state,
 977                                                             gensec_security,
 978                                                             &spnego_state->sub_sec_security);
 979                         if (!NT_STATUS_IS_OK(nt_status)) {
 980                                 spnego_free_data(&spnego);
 981                                 return nt_status;
 982                         }
 983                         /* select the sub context */
 984                         nt_status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
 985                                                              spnego.negTokenTarg.supportedMech);
 986                         if (!NT_STATUS_IS_OK(nt_status)) {
 987                                 spnego_free_data(&spnego);
 988                                 return nt_status;
 989                         }
 990
 991                         nt_status = gensec_update(spnego_state->sub_sec_security,
 992                                                   out_mem_ctx,
 993                                                   spnego.negTokenTarg.responseToken,
 994                                                   &unwrapped_out);
 995                         spnego_state->neg_oid = talloc_strdup(spnego_state, spnego.negTokenTarg.supportedMech);
 996                 } else if (spnego_state->no_response_expected) {
 997                         if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
 998                                 DEBUG(3,("GENSEC SPNEGO: client GENSEC accepted, but server rejected (bad password?)\n"));
 999                                 nt_status = NT_STATUS_INVALID_PARAMETER;
1000                         } else if (spnego.negTokenTarg.responseToken.length) {
1001                                 DEBUG(2,("GENSEC SPNEGO: client GENSEC accepted, but server continued negotiation!\n"));
1002                                 nt_status = NT_STATUS_INVALID_PARAMETER;
1003                         } else {
1004                                 nt_status = NT_STATUS_OK;
1005                         }
1006                         if (NT_STATUS_IS_OK(nt_status) && spnego.negTokenTarg.mechListMIC.length > 0) {
1007                                 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
1008                                                                 out_mem_ctx,
1009                                                                 spnego_state->mech_types.data,
1010                                                                 spnego_state->mech_types.length,
1011                                                                 spnego_state->mech_types.data,
1012                                                                 spnego_state->mech_types.length,
1013                                                                 &spnego.negTokenTarg.mechListMIC);
1014                                 if (!NT_STATUS_IS_OK(nt_status)) {
1015                                         DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
1016                                                 nt_errstr(nt_status)));
1017                                 }
1018                         }
1019                 } else {
1020                         bool new_spnego = false;
1021
1022                         nt_status = gensec_update(spnego_state->sub_sec_security,
1023                                                   out_mem_ctx,
1024                                                   spnego.negTokenTarg.responseToken,
1025                                                   &unwrapped_out);
1026
1027                         if (NT_STATUS_IS_OK(nt_status)) {
1028                                 new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
1029                                                                  GENSEC_FEATURE_NEW_SPNEGO);
1030                         }
1031                         if (NT_STATUS_IS_OK(nt_status) && new_spnego) {
1032                                 nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
1033                                                                out_mem_ctx,
1034                                                                spnego_state->mech_types.data,
1035                                                                spnego_state->mech_types.length,
1036                                                                spnego_state->mech_types.data,
1037                                                                spnego_state->mech_types.length,
1038                                                                &mech_list_mic);
1039                                 if (!NT_STATUS_IS_OK(nt_status)) {
1040                                         DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
1041                                                 nt_errstr(nt_status)));
1042                                 }
1043                         }
1044                         if (NT_STATUS_IS_OK(nt_status)) {
1045                                 spnego_state->no_response_expected = true;
1046                         }
1047                 }
1048
1049                 spnego_free_data(&spnego);
1050
1051                 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
1052                         && !NT_STATUS_IS_OK(nt_status)) {
1053                         DEBUG(1, ("SPNEGO(%s) login failed: %s\n",
1054                                   spnego_state->sub_sec_security->ops->name,
1055                                   nt_errstr(nt_status)));
1056                         return nt_status;
1057                 }
1058
1059                 if (unwrapped_out.length) {
1060                         /* compose reply */
1061                         spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
1062                         spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
1063                         spnego_out.negTokenTarg.supportedMech = NULL;
1064                         spnego_out.negTokenTarg.responseToken = unwrapped_out;
1065                         spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
1066
1067                         if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
1068                                 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
1069                                 return NT_STATUS_INVALID_PARAMETER;
1070                         }
1071
1072                         spnego_state->state_position = SPNEGO_CLIENT_TARG;
1073                         nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1074                 } else {
1075
1076                         /* all done - server has accepted, and we agree */
1077                         *out = null_data_blob;
1078
1079                         if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
1080                                 /* unless of course it did not accept */
1081                                 DEBUG(1,("gensec_update ok but not accepted\n"));
1082                                 nt_status = NT_STATUS_INVALID_PARAMETER;
1083                         }
1084
1085                         spnego_state->state_position = SPNEGO_DONE;
1086                 }
1087
1088                 return nt_status;
1089         }
1090         case SPNEGO_DONE:
1091                 /* We should not be called after we are 'done' */
1092                 return NT_STATUS_INVALID_PARAMETER;
1093         }
1094         return NT_STATUS_INVALID_PARAMETER;
1095 }
1096
1097 static bool gensec_spnego_have_feature(struct gensec_security *gensec_security,
1098                                        uint32_t feature)
1099 {
1100         struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1101         if (!spnego_state->sub_sec_security) {
1102                 return false;
1103         }
1104
1105         return gensec_have_feature(spnego_state->sub_sec_security,
1106                                    feature);
1107 }
1108
1109 static const char *gensec_spnego_oids[] = {
1110         GENSEC_OID_SPNEGO,
1111         NULL
1112 };
1113
1114 static const struct gensec_security_ops gensec_spnego_security_ops = {
1115         .name             = "spnego",
1116         .sasl_name        = "GSS-SPNEGO",
1117         .auth_type        = DCERPC_AUTH_TYPE_SPNEGO,
1118         .oid              = gensec_spnego_oids,
1119         .client_start     = gensec_spnego_client_start,
1120         .server_start     = gensec_spnego_server_start,
1121         .update           = gensec_spnego_update,
1122         .seal_packet      = gensec_spnego_seal_packet,
1123         .sign_packet      = gensec_spnego_sign_packet,
1124         .sig_size         = gensec_spnego_sig_size,
1125         .max_wrapped_size = gensec_spnego_max_wrapped_size,
1126         .max_input_size   = gensec_spnego_max_input_size,
1127         .check_packet     = gensec_spnego_check_packet,
1128         .unseal_packet    = gensec_spnego_unseal_packet,
1129         .packet_full_request = gensec_spnego_packet_full_request,
1130         .wrap             = gensec_spnego_wrap,
1131         .unwrap           = gensec_spnego_unwrap,
1132         .wrap_packets     = gensec_spnego_wrap_packets,
1133         .unwrap_packets   = gensec_spnego_unwrap_packets,
1134         .session_key      = gensec_spnego_session_key,
1135         .session_info     = gensec_spnego_session_info,
1136         .have_feature     = gensec_spnego_have_feature,
1137         .enabled          = true,
1138         .priority         = GENSEC_SPNEGO
1139 };
1140
1141 _PUBLIC_ NTSTATUS gensec_spnego_init(void)
1142 {
1143         NTSTATUS ret;
1144         ret = gensec_register(&gensec_spnego_security_ops);
1145         if (!NT_STATUS_IS_OK(ret)) {
1146                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1147                         gensec_spnego_security_ops.name));
1148                 return ret;
1149         }
1150
1151         return ret;
1152 }