www.project-moonshot.org Git - mech_eap.orig/blob - accept_sec_context.c

   1 /*
   2  * Copyright (c) 2010, JANET(UK)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of JANET(UK) nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "gssapiP_eap.h"
  34
  35 #ifdef BUILTIN_EAP
  36 #define EAP_KEY_AVAILABLE(ctx)  ((ctx)->acceptorCtx.eapPolInterface->eapKeyAvailable)
  37 #define EAP_KEY_DATA(ctx)       ((ctx)->acceptorCtx.eapPolInterface->eapKeyData)
  38 #define EAP_KEY_LENGTH(ctx)     ((ctx)->acceptorCtx.eapPolInterface->eapKeyDataLen)
  39 #else
  40 #define EAP_KEY_AVAILABLE(ctx)  0
  41 #define EAP_KEY_DATA(ctx)       NULL
  42 #define EAP_KEY_LENGTH(ctx)     0
  43 #endif /* BUILTIN_EAP */
  44
  45 static OM_uint32
  46 acceptReady(OM_uint32 *minor, gss_ctx_id_t ctx);
  47
  48 #ifdef BUILTIN_EAP
  49 #define EAP_MAX_METHODS 8
  50
  51 #define EAP_TTLS_AUTH_PAP 1
  52 #define EAP_TTLS_AUTH_CHAP 2
  53 #define EAP_TTLS_AUTH_MSCHAP 4
  54 #define EAP_TTLS_AUTH_MSCHAPV2 8
  55
  56 struct eap_user {
  57         struct {
  58                 int vendor;
  59                 u32 method;
  60         } methods[EAP_MAX_METHODS];
  61         u8 *password;
  62         size_t password_len;
  63         int password_hash; /* whether password is hashed with
  64                             * nt_password_hash() */
  65         int phase2;
  66         int force_version;
  67         int ttls_auth; /* bitfield of
  68                         * EAP_TTLS_AUTH_{PAP,CHAP,MSCHAP,MSCHAPV2} */
  69 };
  70
  71 struct eap_eapol_interface {
  72         /* Lower layer to full authenticator variables */
  73         Boolean eapResp; /* shared with EAPOL Backend Authentication */
  74         struct wpabuf *eapRespData;
  75         Boolean portEnabled;
  76         int retransWhile;
  77         Boolean eapRestart; /* shared with EAPOL Authenticator PAE */
  78         int eapSRTT;
  79         int eapRTTVAR;
  80
  81         /* Full authenticator to lower layer variables */
  82         Boolean eapReq; /* shared with EAPOL Backend Authentication */
  83         Boolean eapNoReq; /* shared with EAPOL Backend Authentication */
  84         Boolean eapSuccess;
  85         Boolean eapFail;
  86         Boolean eapTimeout;
  87         struct wpabuf *eapReqData;
  88         u8 *eapKeyData;
  89         size_t eapKeyDataLen;
  90         Boolean eapKeyAvailable; /* called keyAvailable in IEEE 802.1X-2004 */
  91
  92         /* AAA interface to full authenticator variables */
  93         Boolean aaaEapReq;
  94         Boolean aaaEapNoReq;
  95         Boolean aaaSuccess;
  96         Boolean aaaFail;
  97         struct wpabuf *aaaEapReqData;
  98         u8 *aaaEapKeyData;
  99         size_t aaaEapKeyDataLen;
 100         Boolean aaaEapKeyAvailable;
 101         int aaaMethodTimeout;
 102
 103         /* Full authenticator to AAA interface variables */
 104         Boolean aaaEapResp;
 105         struct wpabuf *aaaEapRespData;
 106         /* aaaIdentity -> eap_get_identity() */
 107         Boolean aaaTimeout;
 108 };
 109
 110 #define eapol_callbacks     SERVER_eapol_callbacks
 111
 112 struct eapol_callbacks {
 113         int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
 114                             int phase2, struct eap_user *user);
 115         const char * (*get_eap_req_id_text)(void *ctx, size_t *len);
 116 };
 117
 118 #define eap_config          SERVER_eap_config
 119
 120 struct eap_config {
 121         void *ssl_ctx;
 122         void *msg_ctx;
 123         void *eap_sim_db_priv;
 124         Boolean backend_auth;
 125         int eap_server;
 126         u8 *pac_opaque_encr_key;
 127         u8 *eap_fast_a_id;
 128         size_t eap_fast_a_id_len;
 129         char *eap_fast_a_id_info;
 130         int eap_fast_prov;
 131         int pac_key_lifetime;
 132         int pac_key_refresh_time;
 133         int eap_sim_aka_result_ind;
 134         int tnc;
 135         struct wps_context *wps;
 136         const struct wpabuf *assoc_wps_ie;
 137         const u8 *peer_addr;
 138         int fragment_size;
 139 };
 140
 141 struct eap_sm * eap_server_sm_init(void *eapol_ctx,
 142                                    struct eapol_callbacks *eapol_cb,
 143                                    struct eap_config *eap_conf);
 144 void eap_server_sm_deinit(struct eap_sm *sm);
 145 int eap_server_sm_step(struct eap_sm *sm);
 146 void eap_sm_notify_cached(struct eap_sm *sm);
 147 void eap_sm_pending_cb(struct eap_sm *sm);
 148 int eap_sm_method_pending(struct eap_sm *sm);
 149 const u8 * eap_get_identity(struct eap_sm *sm, size_t *len);
 150 struct eap_eapol_interface * eap_get_interface(struct eap_sm *sm);
 151
 152 #include <eap_server/eap_i.h>
 153
 154 static OM_uint32
 155 initTls(OM_uint32 *minor,
 156         gss_ctx_id_t ctx)
 157 {
 158     struct tls_config tconf;
 159     struct tls_connection_params tparams;
 160
 161     memset(&tconf, 0, sizeof(tconf));
 162     ctx->acceptorCtx.tlsContext = tls_init(&tconf);
 163     if (ctx->acceptorCtx.tlsContext == NULL)
 164         return GSS_S_FAILURE;
 165
 166     memset(&tparams, 0, sizeof(tparams));
 167     tparams.ca_cert = "ca.pem";
 168     tparams.client_cert = "server.pem";
 169     tparams.private_key = "server-key.pem";
 170
 171     if (tls_global_set_params(ctx->acceptorCtx.tlsContext, &tparams)) {
 172         return GSS_S_FAILURE;
 173     }
 174
 175     if (tls_global_set_verify(ctx->acceptorCtx.tlsContext, 0)) {
 176         return GSS_S_FAILURE;
 177     }
 178
 179     return GSS_S_COMPLETE;
 180 }
 181
 182 static int
 183 serverGetEapUser(void *ctx,
 184                  const unsigned char *identity,
 185                  size_t identityLength,
 186                  int phase2,
 187                  struct eap_user *user)
 188 {
 189     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
 190     OM_uint32 major, minor;
 191     gss_buffer_desc buf;
 192
 193     memset(user, 0, sizeof(*user));
 194
 195     buf.length = identityLength;
 196     buf.value = (void *)identity;
 197
 198     if (phase2 == 0) {
 199         user->methods[0].vendor = EAP_VENDOR_IETF;
 200         user->methods[0].method = EAP_TYPE_PEAP;
 201         return 0;
 202     }
 203
 204     major = gssEapImportName(&minor, &buf, GSS_C_NT_USER_NAME,
 205                              &gssCtx->initiatorName);
 206     if (GSS_ERROR(major))
 207         return -1;
 208
 209     /*
 210      * OK, obviously there is no real security here, this is simply
 211      * for testing the token exchange; this code will be completely
 212      * replaced with libradius once that library is available.
 213      */
 214     user->methods[0].vendor = EAP_VENDOR_IETF;
 215     user->methods[0].method = EAP_TYPE_MSCHAPV2;
 216     user->password = (unsigned char *)strdup(" ");
 217     user->password_len = 1;
 218
 219     gssCtx->initiatorName->attrCtx = gssEapCreateAttrContext(NULL, gssCtx);
 220     if (gssCtx->initiatorName->attrCtx != NULL)
 221         gssCtx->initiatorName->flags |= NAME_FLAG_COMPOSITE;
 222
 223     return 0;
 224 }
 225
 226 static const char *
 227 serverGetEapReqIdText(void *ctx,
 228                       size_t *len)
 229 {
 230     *len = 0;
 231     return NULL;
 232 }
 233
 234 static OM_uint32
 235 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
 236                            gss_ctx_id_t ctx,
 237                            gss_cred_id_t cred,
 238                            gss_buffer_t inputToken,
 239                            gss_channel_bindings_t chanBindings,
 240                            gss_buffer_t outputToken)
 241 {
 242     OM_uint32 major;
 243     OM_uint32 tmpMinor, tmpMajor;
 244     int code;
 245     struct wpabuf respData;
 246     static struct eapol_callbacks cb = { serverGetEapUser, serverGetEapReqIdText };
 247     if (ctx->acceptorCtx.eap == NULL) {
 248         struct eap_config eapConfig;
 249
 250         major = initTls(minor, ctx);
 251         if (GSS_ERROR(major))
 252             goto cleanup;
 253
 254         memset(&eapConfig, 0, sizeof(eapConfig));
 255         eapConfig.eap_server = 1;
 256         eapConfig.ssl_ctx = ctx->acceptorCtx.tlsContext;
 257
 258         ctx->acceptorCtx.eap = eap_server_sm_init(ctx, &cb, &eapConfig);
 259         if (ctx->acceptorCtx.eap == NULL) {
 260             major = GSS_S_FAILURE;
 261             goto cleanup;
 262         }
 263
 264         ctx->acceptorCtx.eapPolInterface = eap_get_interface(ctx->acceptorCtx.eap);
 265         ctx->acceptorCtx.eapPolInterface->portEnabled = TRUE;
 266         ctx->acceptorCtx.eapPolInterface->eapRestart = TRUE;
 267     }
 268
 269     if (ctx->acceptorName == GSS_C_NO_NAME &&
 270         cred != GSS_C_NO_CREDENTIAL &&
 271         cred->name != GSS_C_NO_NAME) {
 272         major = gss_duplicate_name(minor, cred->name, &ctx->acceptorName);
 273         if (GSS_ERROR(major))
 274             goto cleanup;
 275     }
 276
 277     wpabuf_set(&respData, inputToken->value, inputToken->length);
 278     ctx->acceptorCtx.eapPolInterface->eapRespData = &respData;
 279     ctx->acceptorCtx.eapPolInterface->eapResp = TRUE;
 280
 281     code = eap_server_sm_step(ctx->acceptorCtx.eap);
 282
 283     if (ctx->acceptorCtx.eapPolInterface->eapReq) {
 284         ctx->acceptorCtx.eapPolInterface->eapReq = 0;
 285         major = GSS_S_CONTINUE_NEEDED;
 286     }
 287
 288     if (ctx->acceptorCtx.eapPolInterface->eapSuccess) {
 289         ctx->acceptorCtx.eapPolInterface->eapSuccess = 0;
 290         major = acceptReady(minor, ctx);
 291         if (GSS_ERROR(major))
 292             goto cleanup;
 293
 294         ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
 295         major = GSS_S_CONTINUE_NEEDED;
 296     } else if (ctx->acceptorCtx.eapPolInterface->eapFail) {
 297         ctx->acceptorCtx.eapPolInterface->eapFail = 0;
 298         major = GSS_S_FAILURE;
 299     } else if (code == 0) {
 300         major = GSS_S_FAILURE;
 301     }
 302
 303     if (ctx->acceptorCtx.eapPolInterface->eapReqData != NULL) {
 304         gss_buffer_desc buf;
 305
 306         buf.length = wpabuf_len(ctx->acceptorCtx.eapPolInterface->eapReqData);
 307         buf.value = (void *)wpabuf_head(ctx->acceptorCtx.eapPolInterface->eapReqData);
 308
 309         tmpMajor = duplicateBuffer(&tmpMinor, &buf, outputToken);
 310         if (GSS_ERROR(tmpMajor)) {
 311             major = tmpMajor;
 312             *minor = tmpMinor;
 313             goto cleanup;
 314         }
 315     }
 316
 317 cleanup:
 318     ctx->acceptorCtx.eapPolInterface->eapRespData = NULL;
 319
 320     return major;
 321 }
 322 #else
 323 static OM_uint32
 324 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
 325                            gss_ctx_id_t ctx,
 326                            gss_cred_id_t cred,
 327                            gss_buffer_t inputToken,
 328                            gss_channel_bindings_t chanBindings,
 329                            gss_buffer_t outputToken)
 330 {
 331     OM_uint32 major, tmpMinor;
 332
 333 cleanup:
 334     return major;
 335 }
 336 #endif /* BUILTIN_EAP */
 337
 338 static OM_uint32
 339 eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
 340                                  gss_ctx_id_t ctx,
 341                                  gss_cred_id_t cred,
 342                                  gss_buffer_t inputToken,
 343                                  gss_channel_bindings_t chanBindings,
 344                                  gss_buffer_t outputToken)
 345 {
 346     OM_uint32 major, tmpMinor;
 347     gss_iov_buffer_desc iov[2];
 348
 349     outputToken->length = 0;
 350     outputToken->value = NULL;
 351
 352     if (chanBindings == GSS_C_NO_CHANNEL_BINDINGS) {
 353         ctx->state = EAP_STATE_ESTABLISHED;
 354         return GSS_S_COMPLETE;
 355     }
 356
 357     if (inputToken->length < 14) {
 358         return GSS_S_DEFECTIVE_TOKEN;
 359     }
 360
 361     iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
 362     iov[0].buffer.length = 0;
 363     iov[0].buffer.value = NULL;
 364
 365     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
 366         iov[0].buffer = chanBindings->application_data;
 367
 368     iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER;
 369     iov[1].buffer.length = 16;
 370     iov[1].buffer.value = (unsigned char *)inputToken->value - 2;
 371
 372     assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
 373
 374     iov[2].type = GSS_IOV_BUFFER_TYPE_TRAILER;
 375     iov[2].buffer.length = inputToken->length - 14;
 376     iov[2].buffer.value = (unsigned char *)inputToken->value + 14;
 377
 378     major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
 379                                     iov, 3, TOK_TYPE_GSS_CB);
 380     if (major == GSS_S_COMPLETE) {
 381         ctx->state = EAP_STATE_ESTABLISHED;
 382     }
 383
 384 #if 0
 385     gss_release_buffer(&tmpMinor, &iov[0].buffer);
 386 #endif
 387
 388     return major;
 389 }
 390
 391 static OM_uint32
 392 eapGssSmAcceptEstablished(OM_uint32 *minor,
 393                           gss_ctx_id_t ctx,
 394                           gss_cred_id_t cred,
 395                           gss_buffer_t inputToken,
 396                           gss_channel_bindings_t chanBindings,
 397                           gss_buffer_t outputToken)
 398 {
 399     /* Called with already established context */
 400     *minor = EINVAL;
 401     return GSS_S_BAD_STATUS;
 402 }
 403
 404 static struct gss_eap_acceptor_sm {
 405     enum gss_eap_token_type inputTokenType;
 406     enum gss_eap_token_type outputTokenType;
 407     OM_uint32 (*processToken)(OM_uint32 *,
 408                               gss_ctx_id_t,
 409                               gss_cred_id_t,
 410                               gss_buffer_t,
 411                               gss_channel_bindings_t,
 412                               gss_buffer_t);
 413 } eapGssAcceptorSm[] = {
 414     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,  eapGssSmAcceptAuthenticate       },
 415 #if 0
 416     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,  NULL                             },
 417     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,  NULL                             },
 418 #endif
 419     { TOK_TYPE_GSS_CB,      TOK_TYPE_NONE,     eapGssSmAcceptGssChannelBindings },
 420     { TOK_TYPE_NONE,        TOK_TYPE_NONE,     eapGssSmAcceptEstablished        },
 421 };
 422
 423 OM_uint32
 424 gss_accept_sec_context(OM_uint32 *minor,
 425                        gss_ctx_id_t *context_handle,
 426                        gss_cred_id_t cred,
 427                        gss_buffer_t input_token,
 428                        gss_channel_bindings_t input_chan_bindings,
 429                        gss_name_t *src_name,
 430                        gss_OID *mech_type,
 431                        gss_buffer_t output_token,
 432                        OM_uint32 *ret_flags,
 433                        OM_uint32 *time_rec,
 434                        gss_cred_id_t *delegated_cred_handle)
 435 {
 436     OM_uint32 major;
 437     OM_uint32 tmpMajor, tmpMinor;
 438     gss_ctx_id_t ctx = *context_handle;
 439     struct gss_eap_acceptor_sm *sm = NULL;
 440     gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
 441     gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
 442
 443     *minor = 0;
 444
 445     output_token->length = 0;
 446     output_token->value = NULL;
 447
 448     if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_ACCEPT)) {
 449         return GSS_S_NO_CRED;
 450     }
 451
 452     if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
 453         return GSS_S_DEFECTIVE_TOKEN;
 454     }
 455
 456     if (ctx == GSS_C_NO_CONTEXT) {
 457         major = gssEapAllocContext(minor, &ctx);
 458         if (GSS_ERROR(major))
 459             return major;
 460
 461         *context_handle = ctx;
 462     }
 463
 464     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 465
 466     sm = &eapGssAcceptorSm[ctx->state];
 467
 468     major = gssEapVerifyToken(minor, ctx, input_token,
 469                               sm->inputTokenType, &innerInputToken);
 470     if (GSS_ERROR(major))
 471         goto cleanup;
 472
 473     /* If credentials were provided, check they're usable with this mech */
 474     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 475         major = GSS_S_BAD_MECH;
 476         goto cleanup;
 477     }
 478
 479     do {
 480         sm = &eapGssAcceptorSm[ctx->state];
 481
 482         major = (sm->processToken)(minor,
 483                                    ctx,
 484                                    cred,
 485                                    &innerInputToken,
 486                                    input_chan_bindings,
 487                                    &innerOutputToken);
 488         if (GSS_ERROR(major))
 489             goto cleanup;
 490     } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
 491
 492     if (mech_type != NULL) {
 493         if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
 494             duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
 495     }
 496     if (innerOutputToken.length != 0) {
 497         tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
 498                                    sm->outputTokenType, output_token);
 499         if (GSS_ERROR(tmpMajor)) {
 500             major = tmpMajor;
 501             *minor = tmpMinor;
 502             goto cleanup;
 503         }
 504     }
 505     if (ret_flags != NULL)
 506         *ret_flags = ctx->gssFlags;
 507     if (delegated_cred_handle != NULL)
 508         *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 509
 510     if (major == GSS_S_COMPLETE) {
 511         if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
 512             major = gss_duplicate_name(&tmpMinor, ctx->initiatorName, src_name);
 513             if (GSS_ERROR(major))
 514                 goto cleanup;
 515         }
 516         if (time_rec != NULL)
 517             gss_context_time(&tmpMinor, ctx, time_rec);
 518     }
 519
 520     assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
 521
 522 cleanup:
 523     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 524
 525     if (GSS_ERROR(major))
 526         gssEapReleaseContext(&tmpMinor, context_handle);
 527
 528     gss_release_buffer(&tmpMinor, &innerOutputToken);
 529
 530     return major;
 531 }
 532
 533 /*
 534  * Mark a context as ready for cryptographic operations
 535  */
 536 static OM_uint32
 537 acceptReady(OM_uint32 *minor, gss_ctx_id_t ctx)
 538 {
 539     OM_uint32 major;
 540
 541     /* Cache encryption type derived from selected mechanism OID */
 542     major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
 543     if (GSS_ERROR(major))
 544         return major;
 545
 546     if (ctx->encryptionType != ENCTYPE_NULL &&
 547         EAP_KEY_AVAILABLE(ctx)) {
 548         major = gssEapDeriveRfc3961Key(minor,
 549                                        EAP_KEY_DATA(ctx),
 550                                        EAP_KEY_LENGTH(ctx),
 551                                        ctx->encryptionType,
 552                                        &ctx->rfc3961Key);
 553         if (GSS_ERROR(major))
 554             return major;
 555
 556         major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 557                                            &ctx->checksumType);
 558         if (GSS_ERROR(major))
 559             return major;
 560     } else {
 561         /*
 562          * draft-howlett-eap-gss says that integrity/confidentialty should
 563          * always be advertised as available, but if we have no keying
 564          * material it seems confusing to the caller to advertise this.
 565          */
 566         ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
 567     }
 568
 569     major = sequenceInit(minor,
 570                          &ctx->seqState, ctx->recvSeq,
 571                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 572                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 573                          TRUE);
 574     if (GSS_ERROR(major))
 575         return major;
 576
 577     return GSS_S_COMPLETE;
 578 }