mech_eap/init_sec_context.c

   1 /*
   2  * Copyright (c) 2011, 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 /*
  34  * Establish a security context on the initiator (client). These functions
  35  * wrap around libeap.
  36  */
  37
  38 #include "gssapiP_eap.h"
  39 #include "radius/radius.h"
  40 #include "util_radius.h"
  41 #include "utils/radius_utils.h"
  42
  43 static OM_uint32
  44 policyVariableToFlag(enum eapol_bool_var variable)
  45 {
  46     OM_uint32 flag = 0;
  47
  48     switch (variable) {
  49     case EAPOL_eapSuccess:
  50         flag = CTX_FLAG_EAP_SUCCESS;
  51         break;
  52     case EAPOL_eapRestart:
  53         flag = CTX_FLAG_EAP_RESTART;
  54         break;
  55     case EAPOL_eapFail:
  56         flag = CTX_FLAG_EAP_FAIL;
  57         break;
  58     case EAPOL_eapResp:
  59         flag = CTX_FLAG_EAP_RESP;
  60         break;
  61     case EAPOL_eapNoResp:
  62         flag = CTX_FLAG_EAP_NO_RESP;
  63         break;
  64     case EAPOL_eapReq:
  65         flag = CTX_FLAG_EAP_REQ;
  66         break;
  67     case EAPOL_portEnabled:
  68         flag = CTX_FLAG_EAP_PORT_ENABLED;
  69         break;
  70     case EAPOL_altAccept:
  71         flag = CTX_FLAG_EAP_ALT_ACCEPT;
  72         break;
  73     case EAPOL_altReject:
  74         flag = CTX_FLAG_EAP_ALT_REJECT;
  75         break;
  76     }
  77
  78     return flag;
  79 }
  80
  81 static struct eap_peer_config *
  82 peerGetConfig(void *ctx)
  83 {
  84     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
  85
  86     return &gssCtx->initiatorCtx.eapPeerConfig;
  87 }
  88
  89 static Boolean
  90 peerGetBool(void *data, enum eapol_bool_var variable)
  91 {
  92     gss_ctx_id_t ctx = data;
  93     OM_uint32 flag;
  94
  95     if (ctx == GSS_C_NO_CONTEXT)
  96         return FALSE;
  97
  98     flag = policyVariableToFlag(variable);
  99
 100     return ((ctx->flags & flag) != 0);
 101 }
 102
 103 static void
 104 peerSetBool(void *data, enum eapol_bool_var variable,
 105             Boolean value)
 106 {
 107     gss_ctx_id_t ctx = data;
 108     OM_uint32 flag;
 109
 110     if (ctx == GSS_C_NO_CONTEXT)
 111         return;
 112
 113     flag = policyVariableToFlag(variable);
 114
 115     if (value)
 116         ctx->flags |= flag;
 117     else
 118         ctx->flags &= ~(flag);
 119 }
 120
 121 static unsigned int
 122 peerGetInt(void *data, enum eapol_int_var variable)
 123 {
 124     gss_ctx_id_t ctx = data;
 125
 126     if (ctx == GSS_C_NO_CONTEXT)
 127         return FALSE;
 128
 129     GSSEAP_ASSERT(CTX_IS_INITIATOR(ctx));
 130
 131     switch (variable) {
 132     case EAPOL_idleWhile:
 133         return ctx->initiatorCtx.idleWhile;
 134         break;
 135     }
 136
 137     return 0;
 138 }
 139
 140 static void
 141 peerSetInt(void *data, enum eapol_int_var variable,
 142            unsigned int value)
 143 {
 144     gss_ctx_id_t ctx = data;
 145
 146     if (ctx == GSS_C_NO_CONTEXT)
 147         return;
 148
 149     GSSEAP_ASSERT(CTX_IS_INITIATOR(ctx));
 150
 151     switch (variable) {
 152     case EAPOL_idleWhile:
 153         ctx->initiatorCtx.idleWhile = value;
 154         break;
 155     }
 156 }
 157
 158 static struct wpabuf *
 159 peerGetEapReqData(void *ctx)
 160 {
 161     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
 162
 163     return &gssCtx->initiatorCtx.reqData;
 164 }
 165
 166 static void
 167 peerSetConfigBlob(void *ctx GSSEAP_UNUSED,
 168                   struct wpa_config_blob *blob GSSEAP_UNUSED)
 169 {
 170 }
 171
 172 static const struct wpa_config_blob *
 173 peerGetConfigBlob(void *ctx GSSEAP_UNUSED,
 174                   const char *name GSSEAP_UNUSED)
 175 {
 176     return NULL;
 177 }
 178
 179 static void
 180 peerNotifyPending(void *ctx GSSEAP_UNUSED)
 181 {
 182 }
 183
 184 static struct eapol_callbacks gssEapPolicyCallbacks = {
 185     peerGetConfig,
 186     peerGetBool,
 187     peerSetBool,
 188     peerGetInt,
 189     peerSetInt,
 190     peerGetEapReqData,
 191     peerSetConfigBlob,
 192     peerGetConfigBlob,
 193     peerNotifyPending,
 194 };
 195
 196 #ifdef GSSEAP_DEBUG
 197 extern int wpa_debug_level;
 198 #endif
 199
 200 #define CHBIND_SERVICE_NAME_FLAG 0x01
 201 #define CHBIND_HOST_NAME_FLAG 0x02
 202 #define CHBIND_SERVICE_SPECIFIC_FLAG 0x04
 203 #define CHBIND_REALM_NAME_FLAG 0x08
 204
 205 extern void TestFunc();
 206
 207 static OM_uint32
 208 peerInitEapChannelBinding(OM_uint32 *minor, gss_ctx_id_t ctx)
 209 {
 210     struct wpabuf *buf = NULL;
 211     int component, components = 0;
 212     unsigned int requested = 0;
 213     krb5_principal princ;
 214     gss_buffer_desc nameBuf;
 215     OM_uint32 major = GSS_S_COMPLETE;
 216     krb5_context krbContext = NULL;
 217
 218     /* must have acceptor name, but already checked in
 219      * eapGssSmInitAcceptorName(), so maybe redunadant
 220      * to do so here as well? */
 221     if (!ctx->acceptorName) {
 222         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 223         return GSS_S_BAD_NAME;
 224     }
 225
 226     princ = ctx->acceptorName->krbPrincipal;
 227
 228     krbPrincComponentToGssBuffer(princ, 0, &nameBuf);
 229     if (nameBuf.length > 0) {
 230         major = gssEapRadiusAddAttr(minor, &buf, PW_GSS_ACCEPTOR_SERVICE_NAME,
 231                                     VENDORPEC_UKERNA, &nameBuf);
 232         if (GSS_ERROR(major))
 233             goto init_chbind_cleanup;
 234         requested |= CHBIND_SERVICE_NAME_FLAG;
 235     }
 236
 237     krbPrincComponentToGssBuffer(princ, 1, &nameBuf);
 238     if (nameBuf.length > 0) {
 239         major = gssEapRadiusAddAttr(minor, &buf, PW_GSS_ACCEPTOR_HOST_NAME,
 240                                     VENDORPEC_UKERNA, &nameBuf);
 241         if (GSS_ERROR(major))
 242             goto init_chbind_cleanup;
 243         requested |= CHBIND_HOST_NAME_FLAG;
 244     }
 245
 246     GSSEAP_KRB_INIT(&krbContext);
 247     *minor = krbPrincUnparseServiceSpecifics(krbContext, princ, &nameBuf);
 248     if (*minor)
 249         goto init_chbind_cleanup;
 250
 251     if (nameBuf.length > 0) {
 252         major = gssEapRadiusAddAttr(minor, &buf,
 253                                     PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
 254                                     VENDORPEC_UKERNA, &nameBuf);
 255         if (GSS_ERROR(major)) {
 256             krbFreeUnparsedName(krbContext, &nameBuf);
 257             goto init_chbind_cleanup;
 258         }
 259         requested |= CHBIND_SERVICE_SPECIFIC_FLAG;
 260     }
 261     krbFreeUnparsedName(krbContext, &nameBuf);
 262
 263     krbPrincRealmToGssBuffer(princ, &nameBuf);
 264     if (nameBuf.length > 0) {
 265         major = gssEapRadiusAddAttr(minor, &buf,
 266                                     PW_GSS_ACCEPTOR_REALM_NAME,
 267                                     VENDORPEC_UKERNA, &nameBuf);
 268         requested |= CHBIND_REALM_NAME_FLAG;
 269     }
 270
 271     if (requested==0) {
 272         wpabuf_free(buf);
 273         *minor = GSSEAP_BAD_ACCEPTOR_NAME;
 274         return GSS_S_BAD_NAME;
 275     }
 276     ctx->initiatorCtx.chbindData = buf;
 277     ctx->initiatorCtx.chbindReqFlags = requested;
 278     buf = NULL;
 279 init_chbind_cleanup:
 280     wpabuf_free(buf);
 281     return major;
 282 }
 283
 284 static void
 285 peerProcessChbindResponse(void *context, int code, int nsid,
 286                           u8 *data, size_t len)
 287 {
 288     radius_parser msg, vendor_specific;
 289     gss_ctx_id_t ctx = (gss_ctx_id_t )context;
 290     void *vsadata;
 291     u8 type;
 292     u32 vendor_id;
 293     u32 accepted = 0;
 294     size_t vsadata_len;
 295     int i;
 296
 297     if (nsid != CHBIND_NSID_RADIUS)
 298         return;
 299     msg = radius_parser_start(data, len);
 300     if (!msg)
 301         return;
 302     while (radius_parser_parse_tlv(msg, &type, &vendor_id, &vsadata,
 303                                    &vsadata_len) == 0) {
 304         void *unused_data;
 305         size_t unused_len;
 306         u8 vendor_type;
 307
 308         if ((type != RADIUS_ATTR_VENDOR_SPECIFIC) ||
 309             (vendor_id != VENDORPEC_UKERNA))
 310             continue;
 311         vendor_specific = radius_parser_start(vsadata, vsadata_len);
 312         if (!vendor_specific)
 313             continue;
 314         while (radius_parser_parse_vendor_specific(vendor_specific,
 315                                                    &vendor_type,
 316                                                    &unused_data,
 317                                                    &unused_len) == 0) {
 318             switch (vendor_type) {
 319             case PW_GSS_ACCEPTOR_SERVICE_NAME:
 320                 accepted |= CHBIND_SERVICE_NAME_FLAG;
 321                 break;
 322             case PW_GSS_ACCEPTOR_HOST_NAME:
 323                 accepted |= CHBIND_HOST_NAME_FLAG;
 324                 break;
 325             case PW_GSS_ACCEPTOR_SERVICE_SPECIFIC:
 326                 accepted |= CHBIND_SERVICE_SPECIFIC_FLAG;
 327                 break;
 328             case PW_GSS_ACCEPTOR_REALM_NAME:
 329                 accepted |= CHBIND_REALM_NAME_FLAG;
 330                 break;
 331             }
 332         }
 333         radius_parser_finish(vendor_specific);
 334     }
 335     radius_parser_finish(msg);
 336     if ((code == CHBIND_CODE_SUCCESS) &&
 337         (accepted == ctx->initiatorCtx.chbindReqFlags)) {
 338         ctx->flags |= CTX_FLAG_EAP_CHBIND_ACCEPT;
 339         /* Accepted! */
 340     } else {
 341         /* log failures? */
 342     }
 343 }
 344
 345 static OM_uint32
 346 peerConfigInit(OM_uint32 *minor, gss_ctx_id_t ctx)
 347 {
 348     OM_uint32 major;
 349     krb5_context krbContext;
 350     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 351     gss_buffer_desc identity = GSS_C_EMPTY_BUFFER;
 352     gss_buffer_desc realm = GSS_C_EMPTY_BUFFER;
 353     gss_cred_id_t cred = ctx->cred;
 354
 355     eapPeerConfig->identity = NULL;
 356     eapPeerConfig->identity_len = 0;
 357     eapPeerConfig->anonymous_identity = NULL;
 358     eapPeerConfig->anonymous_identity_len = 0;
 359     eapPeerConfig->password = NULL;
 360     eapPeerConfig->password_len = 0;
 361
 362     GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
 363
 364     GSSEAP_KRB_INIT(&krbContext);
 365
 366     eapPeerConfig->fragment_size = 1024;
 367 #ifdef GSSEAP_DEBUG
 368     wpa_debug_level = 0;
 369 #endif
 370
 371     GSSEAP_ASSERT(cred->name != GSS_C_NO_NAME);
 372
 373     if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
 374         *minor = GSSEAP_BAD_INITIATOR_NAME;
 375         return GSS_S_BAD_NAME;
 376     }
 377
 378     /* identity */
 379     major = gssEapDisplayName(minor, cred->name, &identity, NULL);
 380     if (GSS_ERROR(major))
 381         return major;
 382
 383     eapPeerConfig->identity = (unsigned char *)identity.value;
 384     eapPeerConfig->identity_len = identity.length;
 385
 386     krbPrincRealmToGssBuffer(cred->name->krbPrincipal, &realm);
 387
 388     /* anonymous_identity */
 389     eapPeerConfig->anonymous_identity = GSSEAP_MALLOC(realm.length + 2);
 390     if (eapPeerConfig->anonymous_identity == NULL) {
 391         *minor = ENOMEM;
 392         return GSS_S_FAILURE;
 393     }
 394
 395     eapPeerConfig->anonymous_identity[0] = '@';
 396     memcpy(eapPeerConfig->anonymous_identity + 1, realm.value, realm.length);
 397     eapPeerConfig->anonymous_identity[1 + realm.length] = '\0';
 398     eapPeerConfig->anonymous_identity_len = 1 + realm.length;
 399
 400     /* password */
 401     eapPeerConfig->password = (unsigned char *)cred->password.value;
 402     eapPeerConfig->password_len = cred->password.length;
 403
 404     /* certs */
 405     eapPeerConfig->ca_cert = (unsigned char *)cred->caCertificate.value;
 406     eapPeerConfig->subject_match = (unsigned char *)cred->subjectNameConstraint.value;
 407     eapPeerConfig->altsubject_match = (unsigned char *)cred->subjectAltNameConstraint.value;
 408
 409     /* eap channel binding */
 410     if (ctx->initiatorCtx.chbindData)
 411     {
 412         struct eap_peer_chbind_config *chbind_config =
 413             (struct eap_peer_chbind_config *)
 414             GSSEAP_MALLOC(sizeof(struct eap_peer_chbind_config));
 415         if (chbind_config == NULL) {
 416             *minor = ENOMEM;
 417             return GSS_S_FAILURE;
 418         }
 419
 420         chbind_config->req_data = wpabuf_mhead_u8(ctx->initiatorCtx.chbindData);
 421         chbind_config->req_data_len = wpabuf_len(ctx->initiatorCtx.chbindData);
 422         chbind_config->nsid = CHBIND_NSID_RADIUS;
 423         chbind_config->response_cb = &peerProcessChbindResponse;
 424         chbind_config->ctx = ctx;
 425         eapPeerConfig->chbind_config = chbind_config;
 426         eapPeerConfig->chbind_config_len = 1;
 427     } else {
 428         eapPeerConfig->chbind_config = NULL;
 429         eapPeerConfig->chbind_config_len = 0;
 430     }
 431     *minor = 0;
 432     return GSS_S_COMPLETE;
 433 }
 434
 435 static OM_uint32
 436 peerConfigFree(OM_uint32 *minor,
 437                gss_ctx_id_t ctx)
 438 {
 439     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 440
 441     if (eapPeerConfig->identity != NULL) {
 442         GSSEAP_FREE(eapPeerConfig->identity);
 443         eapPeerConfig->identity = NULL;
 444         eapPeerConfig->identity_len = 0;
 445     }
 446
 447     if (eapPeerConfig->anonymous_identity != NULL) {
 448         GSSEAP_FREE(eapPeerConfig->anonymous_identity);
 449         eapPeerConfig->anonymous_identity = NULL;
 450         eapPeerConfig->anonymous_identity_len = 0;
 451     }
 452
 453     *minor = 0;
 454     return GSS_S_COMPLETE;
 455 }
 456
 457 /*
 458  * Mark an initiator context as ready for cryptographic operations
 459  */
 460 static OM_uint32
 461 initReady(OM_uint32 *minor, gss_ctx_id_t ctx, OM_uint32 reqFlags)
 462 {
 463     OM_uint32 major;
 464     const unsigned char *key;
 465     size_t keyLength;
 466
 467 #if 1
 468     /* XXX actually check for mutual auth */
 469     if (reqFlags & GSS_C_MUTUAL_FLAG)
 470         ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
 471 #endif
 472
 473     /* Cache encryption type derived from selected mechanism OID */
 474     major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
 475     if (GSS_ERROR(major))
 476         return major;
 477
 478     if (!eap_key_available(ctx->initiatorCtx.eap)) {
 479         *minor = GSSEAP_KEY_UNAVAILABLE;
 480         return GSS_S_UNAVAILABLE;
 481     }
 482
 483     key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
 484
 485     if (keyLength < EAP_EMSK_LEN) {
 486         *minor = GSSEAP_KEY_TOO_SHORT;
 487         return GSS_S_UNAVAILABLE;
 488     }
 489
 490     major = gssEapDeriveRfc3961Key(minor,
 491                                    &key[EAP_EMSK_LEN / 2],
 492                                    EAP_EMSK_LEN / 2,
 493                                    ctx->encryptionType,
 494                                    &ctx->rfc3961Key);
 495        if (GSS_ERROR(major))
 496            return major;
 497
 498     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 499                                       &ctx->checksumType);
 500     if (GSS_ERROR(major))
 501         return major;
 502
 503     major = sequenceInit(minor,
 504                          &ctx->seqState,
 505                          ctx->recvSeq,
 506                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 507                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 508                          TRUE);
 509     if (GSS_ERROR(major))
 510         return major;
 511
 512     *minor = 0;
 513     return GSS_S_COMPLETE;
 514 }
 515
 516 static OM_uint32
 517 initBegin(OM_uint32 *minor,
 518           gss_ctx_id_t ctx,
 519           gss_name_t target,
 520           gss_OID mech,
 521           OM_uint32 reqFlags GSSEAP_UNUSED,
 522           OM_uint32 timeReq,
 523           gss_channel_bindings_t chanBindings GSSEAP_UNUSED)
 524 {
 525     OM_uint32 major;
 526     gss_cred_id_t cred = ctx->cred;
 527
 528     GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
 529
 530     if (cred->expiryTime)
 531         ctx->expiryTime = cred->expiryTime;
 532     else if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
 533         ctx->expiryTime = 0;
 534     else
 535         ctx->expiryTime = time(NULL) + timeReq;
 536
 537     /*
 538      * The credential mutex protects its name, however we need to
 539      * explicitly lock the acceptor name (unlikely as it may be
 540      * that it has attributes set on it).
 541      */
 542     major = gssEapDuplicateName(minor, cred->name, &ctx->initiatorName);
 543     if (GSS_ERROR(major))
 544         return major;
 545
 546     if (target != GSS_C_NO_NAME) {
 547         GSSEAP_MUTEX_LOCK(&target->mutex);
 548
 549         major = gssEapDuplicateName(minor, target, &ctx->acceptorName);
 550         if (GSS_ERROR(major)) {
 551             GSSEAP_MUTEX_UNLOCK(&target->mutex);
 552             return major;
 553         }
 554
 555         GSSEAP_MUTEX_UNLOCK(&target->mutex);
 556     }
 557
 558     major = gssEapCanonicalizeOid(minor,
 559                                   mech,
 560                                   OID_FLAG_NULL_VALID | OID_FLAG_MAP_NULL_TO_DEFAULT_MECH,
 561                                   &ctx->mechanismUsed);
 562     if (GSS_ERROR(major))
 563         return major;
 564
 565     /* If credentials were provided, check they're usable with this mech */
 566     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 567         *minor = GSSEAP_CRED_MECH_MISMATCH;
 568         return GSS_S_BAD_MECH;
 569     }
 570
 571     *minor = 0;
 572     return GSS_S_COMPLETE;
 573 }
 574
 575 static OM_uint32
 576 eapGssSmInitError(OM_uint32 *minor,
 577                   gss_cred_id_t cred GSSEAP_UNUSED,
 578                   gss_ctx_id_t ctx GSSEAP_UNUSED,
 579                   gss_name_t target GSSEAP_UNUSED,
 580                   gss_OID mech GSSEAP_UNUSED,
 581                   OM_uint32 reqFlags GSSEAP_UNUSED,
 582                   OM_uint32 timeReq GSSEAP_UNUSED,
 583                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 584                   gss_buffer_t inputToken,
 585                   gss_buffer_t outputToken GSSEAP_UNUSED,
 586                   OM_uint32 *smFlags GSSEAP_UNUSED)
 587 {
 588     OM_uint32 major;
 589     unsigned char *p;
 590
 591     if (inputToken->length < 8) {
 592         *minor = GSSEAP_TOK_TRUNC;
 593         return GSS_S_DEFECTIVE_TOKEN;
 594     }
 595
 596     p = (unsigned char *)inputToken->value;
 597
 598     major = load_uint32_be(&p[0]);
 599     *minor = ERROR_TABLE_BASE_eapg + load_uint32_be(&p[4]);
 600
 601     if (!GSS_ERROR(major) || !IS_WIRE_ERROR(*minor)) {
 602         major = GSS_S_FAILURE;
 603         *minor = GSSEAP_BAD_ERROR_TOKEN;
 604     }
 605
 606     GSSEAP_ASSERT(GSS_ERROR(major));
 607
 608     return major;
 609 }
 610
 611 #ifdef GSSEAP_ENABLE_REAUTH
 612 static OM_uint32
 613 eapGssSmInitGssReauth(OM_uint32 *minor,
 614                       gss_cred_id_t cred,
 615                       gss_ctx_id_t ctx,
 616                       gss_name_t target,
 617                       gss_OID mech GSSEAP_UNUSED,
 618                       OM_uint32 reqFlags,
 619                       OM_uint32 timeReq,
 620                       gss_channel_bindings_t chanBindings,
 621                       gss_buffer_t inputToken,
 622                       gss_buffer_t outputToken,
 623                       OM_uint32 *smFlags GSSEAP_UNUSED)
 624 {
 625     OM_uint32 major, tmpMinor;
 626     gss_name_t mechTarget = GSS_C_NO_NAME;
 627     gss_OID actualMech = GSS_C_NO_OID;
 628     OM_uint32 gssFlags, timeRec;
 629
 630     /*
 631      * Here we use the passed in credential handle because the resolved
 632      * context credential does not currently have the reauth creds.
 633      */
 634     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
 635         if (!gssEapCanReauthP(cred, target, timeReq))
 636             return GSS_S_CONTINUE_NEEDED;
 637
 638         ctx->flags |= CTX_FLAG_KRB_REAUTH;
 639     } else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
 640         major = GSS_S_DEFECTIVE_TOKEN;
 641         *minor = GSSEAP_WRONG_ITOK;
 642         goto cleanup;
 643     }
 644
 645     GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
 646
 647     major = gssEapMechToGlueName(minor, target, &mechTarget);
 648     if (GSS_ERROR(major))
 649         goto cleanup;
 650
 651     major = gssInitSecContext(minor,
 652                               cred->reauthCred,
 653                               &ctx->reauthCtx,
 654                               mechTarget,
 655                               (gss_OID)gss_mech_krb5,
 656                               reqFlags | GSS_C_MUTUAL_FLAG,
 657                               timeReq,
 658                               chanBindings,
 659                               inputToken,
 660                               &actualMech,
 661                               outputToken,
 662                               &gssFlags,
 663                               &timeRec);
 664     if (GSS_ERROR(major))
 665         goto cleanup;
 666
 667     ctx->gssFlags = gssFlags;
 668
 669     if (major == GSS_S_COMPLETE) {
 670         GSSEAP_ASSERT(GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE);
 671
 672         major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
 673         if (GSS_ERROR(major))
 674             goto cleanup;
 675         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 676     } else {
 677         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
 678     }
 679
 680 cleanup:
 681     gssReleaseName(&tmpMinor, &mechTarget);
 682
 683     return major;
 684 }
 685 #endif /* GSSEAP_ENABLE_REAUTH */
 686
 687 #ifdef GSSEAP_DEBUG
 688 static OM_uint32
 689 eapGssSmInitVendorInfo(OM_uint32 *minor,
 690                        gss_cred_id_t cred GSSEAP_UNUSED,
 691                        gss_ctx_id_t ctx GSSEAP_UNUSED,
 692                        gss_name_t target GSSEAP_UNUSED,
 693                        gss_OID mech GSSEAP_UNUSED,
 694                        OM_uint32 reqFlags GSSEAP_UNUSED,
 695                        OM_uint32 timeReq GSSEAP_UNUSED,
 696                        gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 697                        gss_buffer_t inputToken GSSEAP_UNUSED,
 698                        gss_buffer_t outputToken,
 699                        OM_uint32 *smFlags GSSEAP_UNUSED)
 700 {
 701     OM_uint32 major;
 702
 703     major = makeStringBuffer(minor, "JANET(UK)", outputToken);
 704     if (GSS_ERROR(major))
 705         return major;
 706
 707     return GSS_S_CONTINUE_NEEDED;
 708 }
 709 #endif
 710
 711 static OM_uint32
 712 eapGssSmInitAcceptorName(OM_uint32 *minor,
 713                          gss_cred_id_t cred GSSEAP_UNUSED,
 714                          gss_ctx_id_t ctx,
 715                          gss_name_t target GSSEAP_UNUSED,
 716                          gss_OID mech GSSEAP_UNUSED,
 717                          OM_uint32 reqFlags GSSEAP_UNUSED,
 718                          OM_uint32 timeReq GSSEAP_UNUSED,
 719                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 720                          gss_buffer_t inputToken GSSEAP_UNUSED,
 721                          gss_buffer_t outputToken,
 722                          OM_uint32 *smFlags GSSEAP_UNUSED)
 723 {
 724     OM_uint32 major;
 725
 726     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL &&
 727         ctx->acceptorName != GSS_C_NO_NAME) {
 728
 729         /* Send desired target name to acceptor */
 730         major = gssEapDisplayName(minor, ctx->acceptorName,
 731                                   outputToken, NULL);
 732         if (GSS_ERROR(major))
 733             return major;
 734     } else if (inputToken != GSS_C_NO_BUFFER &&
 735                ctx->acceptorName == GSS_C_NO_NAME) {
 736         /* Accept target name hint from acceptor */
 737         major = gssEapImportName(minor, inputToken,
 738                                  GSS_C_NT_USER_NAME,
 739                                  ctx->mechanismUsed,
 740                                  &ctx->acceptorName);
 741         if (GSS_ERROR(major))
 742             return major;
 743     }
 744
 745     /*
 746      * Currently, other parts of the code assume that the acceptor name
 747      * is available, hence this check.
 748      */
 749     if (ctx->acceptorName == GSS_C_NO_NAME) {
 750         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 751         return GSS_S_FAILURE;
 752     }
 753
 754     /*
 755      * Generate channel binding data
 756      */
 757     if (ctx->initiatorCtx.chbindData == NULL)
 758     {
 759         major = peerInitEapChannelBinding(minor, ctx);
 760         if (GSS_ERROR(major))
 761             return major;
 762     }
 763
 764     return GSS_S_CONTINUE_NEEDED;
 765 }
 766
 767 static OM_uint32
 768 eapGssSmInitIdentity(OM_uint32 *minor,
 769                      gss_cred_id_t cred GSSEAP_UNUSED,
 770                      gss_ctx_id_t ctx,
 771                      gss_name_t target GSSEAP_UNUSED,
 772                      gss_OID mech GSSEAP_UNUSED,
 773                      OM_uint32 reqFlags GSSEAP_UNUSED,
 774                      OM_uint32 timeReq GSSEAP_UNUSED,
 775                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 776                      gss_buffer_t inputToken GSSEAP_UNUSED,
 777                      gss_buffer_t outputToken GSSEAP_UNUSED,
 778                      OM_uint32 *smFlags)
 779 {
 780     struct eap_config eapConfig;
 781
 782 #ifdef GSSEAP_ENABLE_REAUTH
 783     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE) {
 784         OM_uint32 tmpMinor;
 785
 786         /* server didn't support reauthentication, sent EAP request */
 787         gssDeleteSecContext(&tmpMinor, &ctx->reauthCtx, GSS_C_NO_BUFFER);
 788         ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
 789         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
 790     } else
 791 #endif
 792         *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 793
 794     GSSEAP_ASSERT((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
 795     GSSEAP_ASSERT(inputToken == GSS_C_NO_BUFFER);
 796
 797     memset(&eapConfig, 0, sizeof(eapConfig));
 798
 799     ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
 800                                              &gssEapPolicyCallbacks,
 801                                              ctx,
 802                                              &eapConfig);
 803     if (ctx->initiatorCtx.eap == NULL) {
 804         *minor = GSSEAP_PEER_SM_INIT_FAILURE;
 805         return GSS_S_FAILURE;
 806     }
 807
 808     ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
 809
 810     /* poke EAP state machine */
 811     if (eap_peer_sm_step(ctx->initiatorCtx.eap) != 0) {
 812         *minor = GSSEAP_PEER_SM_STEP_FAILURE;
 813         return GSS_S_FAILURE;
 814     }
 815
 816     GSSEAP_SM_TRANSITION_NEXT(ctx);
 817
 818     *minor = 0;
 819
 820     return GSS_S_CONTINUE_NEEDED;
 821 }
 822
 823 static OM_uint32
 824 eapGssSmInitAuthenticate(OM_uint32 *minor,
 825                          gss_cred_id_t cred GSSEAP_UNUSED,
 826                          gss_ctx_id_t ctx,
 827                          gss_name_t target GSSEAP_UNUSED,
 828                          gss_OID mech GSSEAP_UNUSED,
 829                          OM_uint32 reqFlags GSSEAP_UNUSED,
 830                          OM_uint32 timeReq GSSEAP_UNUSED,
 831                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 832                          gss_buffer_t inputToken GSSEAP_UNUSED,
 833                          gss_buffer_t outputToken,
 834                          OM_uint32 *smFlags)
 835 {
 836     OM_uint32 major;
 837     OM_uint32 tmpMinor;
 838     struct wpabuf *resp = NULL;
 839
 840     *minor = 0;
 841
 842     GSSEAP_ASSERT(inputToken != GSS_C_NO_BUFFER);
 843
 844     major = peerConfigInit(minor, ctx);
 845     if (GSS_ERROR(major))
 846         goto cleanup;
 847
 848     GSSEAP_ASSERT(ctx->initiatorCtx.eap != NULL);
 849     GSSEAP_ASSERT(ctx->flags & CTX_FLAG_EAP_PORT_ENABLED);
 850
 851     ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
 852
 853     wpabuf_set(&ctx->initiatorCtx.reqData,
 854                inputToken->value, inputToken->length);
 855
 856     major = GSS_S_CONTINUE_NEEDED;
 857
 858     eap_peer_sm_step(ctx->initiatorCtx.eap);
 859     if (ctx->flags & CTX_FLAG_EAP_RESP) {
 860         ctx->flags &= ~(CTX_FLAG_EAP_RESP);
 861
 862         resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
 863     } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
 864         major = initReady(minor, ctx, reqFlags);
 865         if (GSS_ERROR(major))
 866             goto cleanup;
 867
 868         ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
 869         major = GSS_S_CONTINUE_NEEDED;
 870         GSSEAP_SM_TRANSITION_NEXT(ctx);
 871     } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
 872         major = GSS_S_DEFECTIVE_CREDENTIAL;
 873         *minor = GSSEAP_PEER_AUTH_FAILURE;
 874     } else {
 875         major = GSS_S_DEFECTIVE_TOKEN;
 876         *minor = GSSEAP_PEER_BAD_MESSAGE;
 877     }
 878
 879 cleanup:
 880     if (resp != NULL) {
 881         OM_uint32 tmpMajor;
 882         gss_buffer_desc respBuf;
 883
 884         GSSEAP_ASSERT(major == GSS_S_CONTINUE_NEEDED);
 885
 886         respBuf.length = wpabuf_len(resp);
 887         respBuf.value = (void *)wpabuf_head(resp);
 888
 889         tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
 890         if (GSS_ERROR(tmpMajor)) {
 891             major = tmpMajor;
 892             *minor = tmpMinor;
 893         }
 894
 895         *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 896     }
 897
 898     wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
 899     peerConfigFree(&tmpMinor, ctx);
 900
 901     return major;
 902 }
 903
 904 static OM_uint32
 905 eapGssSmInitGssFlags(OM_uint32 *minor,
 906                      gss_cred_id_t cred GSSEAP_UNUSED,
 907                      gss_ctx_id_t ctx,
 908                      gss_name_t target GSSEAP_UNUSED,
 909                      gss_OID mech GSSEAP_UNUSED,
 910                      OM_uint32 reqFlags GSSEAP_UNUSED,
 911                      OM_uint32 timeReq GSSEAP_UNUSED,
 912                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 913                      gss_buffer_t inputToken GSSEAP_UNUSED,
 914                      gss_buffer_t outputToken,
 915                      OM_uint32 *smFlags GSSEAP_UNUSED)
 916 {
 917     unsigned char wireFlags[4];
 918     gss_buffer_desc flagsBuf;
 919
 920     store_uint32_be(ctx->gssFlags & GSSEAP_WIRE_FLAGS_MASK, wireFlags);
 921
 922     flagsBuf.length = sizeof(wireFlags);
 923     flagsBuf.value = wireFlags;
 924
 925     return duplicateBuffer(minor, &flagsBuf, outputToken);
 926 }
 927
 928 static OM_uint32
 929 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
 930                                gss_cred_id_t cred GSSEAP_UNUSED,
 931                                gss_ctx_id_t ctx,
 932                                gss_name_t target GSSEAP_UNUSED,
 933                                gss_OID mech GSSEAP_UNUSED,
 934                                OM_uint32 reqFlags GSSEAP_UNUSED,
 935                                OM_uint32 timeReq GSSEAP_UNUSED,
 936                                gss_channel_bindings_t chanBindings,
 937                                gss_buffer_t inputToken GSSEAP_UNUSED,
 938                                gss_buffer_t outputToken,
 939                                OM_uint32 *smFlags)
 940 {
 941     OM_uint32 major;
 942     gss_buffer_desc buffer = GSS_C_EMPTY_BUFFER;
 943
 944     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
 945         buffer = chanBindings->application_data;
 946
 947     major = gssEapWrap(minor, ctx, TRUE, GSS_C_QOP_DEFAULT,
 948                        &buffer, NULL, outputToken);
 949     if (GSS_ERROR(major))
 950         return major;
 951
 952     GSSEAP_ASSERT(outputToken->value != NULL);
 953
 954     *minor = 0;
 955     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 956
 957     return GSS_S_CONTINUE_NEEDED;
 958 }
 959
 960 static OM_uint32
 961 eapGssSmInitInitiatorMIC(OM_uint32 *minor,
 962                          gss_cred_id_t cred GSSEAP_UNUSED,
 963                          gss_ctx_id_t ctx,
 964                          gss_name_t target GSSEAP_UNUSED,
 965                          gss_OID mech GSSEAP_UNUSED,
 966                          OM_uint32 reqFlags GSSEAP_UNUSED,
 967                          OM_uint32 timeReq GSSEAP_UNUSED,
 968                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 969                          gss_buffer_t inputToken GSSEAP_UNUSED,
 970                          gss_buffer_t outputToken,
 971                          OM_uint32 *smFlags)
 972 {
 973     OM_uint32 major;
 974
 975     major = gssEapMakeTokenMIC(minor, ctx, outputToken);
 976     if (GSS_ERROR(major))
 977         return major;
 978
 979     GSSEAP_SM_TRANSITION_NEXT(ctx);
 980
 981     *minor = 0;
 982     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 983
 984     return GSS_S_CONTINUE_NEEDED;
 985 }
 986
 987 #ifdef GSSEAP_ENABLE_REAUTH
 988 static OM_uint32
 989 eapGssSmInitReauthCreds(OM_uint32 *minor,
 990                         gss_cred_id_t cred,
 991                         gss_ctx_id_t ctx,
 992                         gss_name_t target GSSEAP_UNUSED,
 993                         gss_OID mech GSSEAP_UNUSED,
 994                         OM_uint32 reqFlags GSSEAP_UNUSED,
 995                         OM_uint32 timeReq GSSEAP_UNUSED,
 996                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 997                         gss_buffer_t inputToken,
 998                         gss_buffer_t outputToken GSSEAP_UNUSED,
 999                         OM_uint32 *smFlags GSSEAP_UNUSED)
1000 {
1001     OM_uint32 major;
1002
1003     if (ctx->gssFlags & GSS_C_MUTUAL_FLAG) {
1004         major = gssEapStoreReauthCreds(minor, ctx, cred, inputToken);
1005         if (GSS_ERROR(major))
1006             return major;
1007     }
1008
1009     *minor = 0;
1010     return GSS_S_CONTINUE_NEEDED;
1011 }
1012 #endif /* GSSEAP_ENABLE_REAUTH */
1013
1014 static OM_uint32
1015 eapGssSmInitAcceptorMIC(OM_uint32 *minor,
1016                         gss_cred_id_t cred GSSEAP_UNUSED,
1017                         gss_ctx_id_t ctx,
1018                         gss_name_t target GSSEAP_UNUSED,
1019                         gss_OID mech GSSEAP_UNUSED,
1020                         OM_uint32 reqFlags GSSEAP_UNUSED,
1021                         OM_uint32 timeReq GSSEAP_UNUSED,
1022                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1023                         gss_buffer_t inputToken,
1024                         gss_buffer_t outputToken GSSEAP_UNUSED,
1025                         OM_uint32 *smFlags GSSEAP_UNUSED)
1026 {
1027     OM_uint32 major;
1028
1029     major = gssEapVerifyTokenMIC(minor, ctx, inputToken);
1030     if (GSS_ERROR(major))
1031         return major;
1032
1033     GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
1034
1035     *minor = 0;
1036
1037     return GSS_S_COMPLETE;
1038 }
1039
1040 static struct gss_eap_sm eapGssInitiatorSm[] = {
1041     {
1042         ITOK_TYPE_CONTEXT_ERR,
1043         ITOK_TYPE_NONE,
1044         GSSEAP_STATE_ALL & ~(GSSEAP_STATE_INITIAL),
1045         0,
1046         eapGssSmInitError
1047     },
1048     {
1049         ITOK_TYPE_ACCEPTOR_NAME_RESP,
1050         ITOK_TYPE_ACCEPTOR_NAME_REQ,
1051         GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE,
1052         0,
1053         eapGssSmInitAcceptorName
1054     },
1055 #ifdef GSSEAP_DEBUG
1056     {
1057         ITOK_TYPE_NONE,
1058         ITOK_TYPE_VENDOR_INFO,
1059         GSSEAP_STATE_INITIAL,
1060         0,
1061         eapGssSmInitVendorInfo
1062     },
1063 #endif
1064 #ifdef GSSEAP_ENABLE_REAUTH
1065     {
1066         ITOK_TYPE_REAUTH_RESP,
1067         ITOK_TYPE_REAUTH_REQ,
1068         GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
1069         0,
1070         eapGssSmInitGssReauth
1071     },
1072 #endif
1073     {
1074         ITOK_TYPE_NONE,
1075         ITOK_TYPE_NONE,
1076 #ifdef GSSEAP_ENABLE_REAUTH
1077         GSSEAP_STATE_REAUTHENTICATE |
1078 #endif
1079         GSSEAP_STATE_INITIAL,
1080         SM_ITOK_FLAG_REQUIRED,
1081         eapGssSmInitIdentity
1082     },
1083     {
1084         ITOK_TYPE_EAP_REQ,
1085         ITOK_TYPE_EAP_RESP,
1086         GSSEAP_STATE_AUTHENTICATE,
1087         SM_ITOK_FLAG_REQUIRED,
1088         eapGssSmInitAuthenticate
1089     },
1090     {
1091         ITOK_TYPE_NONE,
1092         ITOK_TYPE_GSS_FLAGS,
1093         GSSEAP_STATE_INITIATOR_EXTS,
1094         0,
1095         eapGssSmInitGssFlags
1096     },
1097     {
1098         ITOK_TYPE_NONE,
1099         ITOK_TYPE_GSS_CHANNEL_BINDINGS,
1100         GSSEAP_STATE_INITIATOR_EXTS,
1101         SM_ITOK_FLAG_REQUIRED,
1102         eapGssSmInitGssChannelBindings
1103     },
1104     {
1105         ITOK_TYPE_NONE,
1106         ITOK_TYPE_INITIATOR_MIC,
1107         GSSEAP_STATE_INITIATOR_EXTS,
1108         SM_ITOK_FLAG_REQUIRED,
1109         eapGssSmInitInitiatorMIC
1110     },
1111 #ifdef GSSEAP_ENABLE_REAUTH
1112     {
1113         ITOK_TYPE_REAUTH_CREDS,
1114         ITOK_TYPE_NONE,
1115         GSSEAP_STATE_ACCEPTOR_EXTS,
1116         0,
1117         eapGssSmInitReauthCreds
1118     },
1119 #endif
1120     /* other extensions go here */
1121     {
1122         ITOK_TYPE_ACCEPTOR_MIC,
1123         ITOK_TYPE_NONE,
1124         GSSEAP_STATE_ACCEPTOR_EXTS,
1125         SM_ITOK_FLAG_REQUIRED,
1126         eapGssSmInitAcceptorMIC
1127     }
1128 };
1129
1130 OM_uint32
1131 gssEapInitSecContext(OM_uint32 *minor,
1132                      gss_cred_id_t cred,
1133                      gss_ctx_id_t ctx,
1134                      gss_name_t target_name,
1135                      gss_OID mech_type,
1136                      OM_uint32 req_flags,
1137                      OM_uint32 time_req,
1138                      gss_channel_bindings_t input_chan_bindings,
1139                      gss_buffer_t input_token,
1140                      gss_OID *actual_mech_type,
1141                      gss_buffer_t output_token,
1142                      OM_uint32 *ret_flags,
1143                      OM_uint32 *time_rec)
1144 {
1145     OM_uint32 major, tmpMinor;
1146     int initialContextToken = (ctx->mechanismUsed == GSS_C_NO_OID);
1147
1148     /*
1149      * XXX is acquiring the credential lock here necessary? The password is
1150      * mutable but the contract could specify that this is not updated whilst
1151      * a context is being initialized.
1152      */
1153     if (cred != GSS_C_NO_CREDENTIAL)
1154         GSSEAP_MUTEX_LOCK(&cred->mutex);
1155
1156     if (ctx->cred == GSS_C_NO_CREDENTIAL) {
1157         major = gssEapResolveInitiatorCred(minor, cred, target_name, &ctx->cred);
1158         if (GSS_ERROR(major))
1159             goto cleanup;
1160
1161         GSSEAP_ASSERT(ctx->cred != GSS_C_NO_CREDENTIAL);
1162     }
1163
1164     GSSEAP_MUTEX_LOCK(&ctx->cred->mutex);
1165
1166     GSSEAP_ASSERT(ctx->cred->flags & CRED_FLAG_RESOLVED);
1167     GSSEAP_ASSERT(ctx->cred->flags & CRED_FLAG_INITIATE);
1168
1169     if (initialContextToken) {
1170         major = initBegin(minor, ctx, target_name, mech_type,
1171                           req_flags, time_req, input_chan_bindings);
1172         if (GSS_ERROR(major))
1173             goto cleanup;
1174     }
1175
1176     major = gssEapSmStep(minor,
1177                          cred,
1178                          ctx,
1179                          target_name,
1180                          mech_type,
1181                          req_flags,
1182                          time_req,
1183                          input_chan_bindings,
1184                          input_token,
1185                          output_token,
1186                          eapGssInitiatorSm,
1187                          sizeof(eapGssInitiatorSm) / sizeof(eapGssInitiatorSm[0]));
1188     if (GSS_ERROR(major))
1189         goto cleanup;
1190
1191     if (actual_mech_type != NULL) {
1192         OM_uint32 tmpMajor;
1193
1194         tmpMajor = gssEapCanonicalizeOid(&tmpMinor, ctx->mechanismUsed, 0, actual_mech_type);
1195         if (GSS_ERROR(tmpMajor)) {
1196             major = tmpMajor;
1197             *minor = tmpMinor;
1198             goto cleanup;
1199         }
1200     }
1201     if (ret_flags != NULL) {
1202         if ((major == GSS_S_COMPLETE) &&
1203             (ctx->flags & CTX_FLAG_EAP_CHBIND_ACCEPT))
1204             *ret_flags = ctx->gssFlags | GSS_C_MUTUAL_FLAG;
1205         else
1206             *ret_flags = ctx->gssFlags & (~GSS_C_MUTUAL_FLAG);
1207     }
1208     if (major == GSS_S_COMPLETE)
1209         major = major;
1210     if (time_rec != NULL)
1211         gssEapContextTime(&tmpMinor, ctx, time_rec);
1212
1213     GSSEAP_ASSERT(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
1214
1215 cleanup:
1216     if (cred != GSS_C_NO_CREDENTIAL)
1217         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
1218     if (ctx->cred != GSS_C_NO_CREDENTIAL)
1219         GSSEAP_MUTEX_UNLOCK(&ctx->cred->mutex);
1220
1221     return major;
1222 }
1223
1224 OM_uint32 GSSAPI_CALLCONV
1225 gss_init_sec_context(OM_uint32 *minor,
1226                      gss_cred_id_t cred,
1227                      gss_ctx_id_t *context_handle,
1228                      gss_name_t target_name,
1229                      gss_OID mech_type,
1230                      OM_uint32 req_flags,
1231                      OM_uint32 time_req,
1232                      gss_channel_bindings_t input_chan_bindings,
1233                      gss_buffer_t input_token,
1234                      gss_OID *actual_mech_type,
1235                      gss_buffer_t output_token,
1236                      OM_uint32 *ret_flags,
1237                      OM_uint32 *time_rec)
1238 {
1239     OM_uint32 major, tmpMinor;
1240     gss_ctx_id_t ctx = *context_handle;
1241
1242     *minor = 0;
1243
1244     output_token->length = 0;
1245     output_token->value = NULL;
1246
1247     if (ctx == GSS_C_NO_CONTEXT) {
1248         if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
1249             *minor = GSSEAP_WRONG_SIZE;
1250             return GSS_S_DEFECTIVE_TOKEN;
1251         }
1252
1253         major = gssEapAllocContext(minor, &ctx);
1254         if (GSS_ERROR(major))
1255             return major;
1256
1257         ctx->flags |= CTX_FLAG_INITIATOR;
1258
1259         *context_handle = ctx;
1260     }
1261
1262     GSSEAP_MUTEX_LOCK(&ctx->mutex);
1263
1264     major = gssEapInitSecContext(minor,
1265                                  cred,
1266                                  ctx,
1267                                  target_name,
1268                                  mech_type,
1269                                  req_flags,
1270                                  time_req,
1271                                  input_chan_bindings,
1272                                  input_token,
1273                                  actual_mech_type,
1274                                  output_token,
1275                                  ret_flags,
1276                                  time_rec);
1277
1278     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
1279
1280     if (GSS_ERROR(major))
1281         gssEapReleaseContext(&tmpMinor, context_handle);
1282
1283     return major;
1284 }