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 /* methods allowed for phase1 authentication*/
  44 static const struct eap_method_type allowed_eap_method_types[] = {
  45     {EAP_VENDOR_IETF, EAP_TYPE_TTLS},
  46     {EAP_VENDOR_IETF, EAP_TYPE_NONE}};
  47
  48 static OM_uint32
  49 policyVariableToFlag(enum eapol_bool_var variable)
  50 {
  51     OM_uint32 flag = 0;
  52
  53     switch (variable) {
  54     case EAPOL_eapSuccess:
  55         flag = CTX_FLAG_EAP_SUCCESS;
  56         break;
  57     case EAPOL_eapRestart:
  58         flag = CTX_FLAG_EAP_RESTART;
  59         break;
  60     case EAPOL_eapFail:
  61         flag = CTX_FLAG_EAP_FAIL;
  62         break;
  63     case EAPOL_eapResp:
  64         flag = CTX_FLAG_EAP_RESP;
  65         break;
  66     case EAPOL_eapNoResp:
  67         flag = CTX_FLAG_EAP_NO_RESP;
  68         break;
  69     case EAPOL_eapReq:
  70         flag = CTX_FLAG_EAP_REQ;
  71         break;
  72     case EAPOL_portEnabled:
  73         flag = CTX_FLAG_EAP_PORT_ENABLED;
  74         break;
  75     case EAPOL_altAccept:
  76         flag = CTX_FLAG_EAP_ALT_ACCEPT;
  77         break;
  78     case EAPOL_altReject:
  79         flag = CTX_FLAG_EAP_ALT_REJECT;
  80         break;
  81     }
  82
  83     return flag;
  84 }
  85
  86 static struct eap_peer_config *
  87 peerGetConfig(void *ctx)
  88 {
  89     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
  90
  91     return &gssCtx->initiatorCtx.eapPeerConfig;
  92 }
  93
  94 static Boolean
  95 peerGetBool(void *data, enum eapol_bool_var variable)
  96 {
  97     gss_ctx_id_t ctx = data;
  98     OM_uint32 flag;
  99
 100     if (ctx == GSS_C_NO_CONTEXT)
 101         return FALSE;
 102
 103     flag = policyVariableToFlag(variable);
 104
 105     return ((ctx->flags & flag) != 0);
 106 }
 107
 108 static void
 109 peerSetBool(void *data, enum eapol_bool_var variable,
 110             Boolean value)
 111 {
 112     gss_ctx_id_t ctx = data;
 113     OM_uint32 flag;
 114
 115     if (ctx == GSS_C_NO_CONTEXT)
 116         return;
 117
 118     flag = policyVariableToFlag(variable);
 119
 120     if (value)
 121         ctx->flags |= flag;
 122     else
 123         ctx->flags &= ~(flag);
 124 }
 125
 126 static unsigned int
 127 peerGetInt(void *data, enum eapol_int_var variable)
 128 {
 129     gss_ctx_id_t ctx = data;
 130
 131     if (ctx == GSS_C_NO_CONTEXT)
 132         return FALSE;
 133
 134     GSSEAP_ASSERT(CTX_IS_INITIATOR(ctx));
 135
 136     switch (variable) {
 137     case EAPOL_idleWhile:
 138         return ctx->initiatorCtx.idleWhile;
 139         break;
 140     }
 141
 142     return 0;
 143 }
 144
 145 static void
 146 peerSetInt(void *data, enum eapol_int_var variable,
 147            unsigned int value)
 148 {
 149     gss_ctx_id_t ctx = data;
 150
 151     if (ctx == GSS_C_NO_CONTEXT)
 152         return;
 153
 154     GSSEAP_ASSERT(CTX_IS_INITIATOR(ctx));
 155
 156     switch (variable) {
 157     case EAPOL_idleWhile:
 158         ctx->initiatorCtx.idleWhile = value;
 159         break;
 160     }
 161 }
 162
 163 static struct wpabuf *
 164 peerGetEapReqData(void *ctx)
 165 {
 166     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
 167
 168     return &gssCtx->initiatorCtx.reqData;
 169 }
 170
 171 static void
 172 peerSetConfigBlob(void *ctx GSSEAP_UNUSED,
 173                   struct wpa_config_blob *blob GSSEAP_UNUSED)
 174 {
 175 }
 176
 177 static const struct wpa_config_blob *
 178 peerGetConfigBlob(void *ctx,
 179                   const char *name)
 180 {
 181     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
 182     size_t index;
 183
 184     if (strcmp(name, "client-cert") == 0)
 185         index = CONFIG_BLOB_CLIENT_CERT;
 186     else if (strcmp(name, "private-key") == 0)
 187         index = CONFIG_BLOB_PRIVATE_KEY;
 188     else if (strcmp(name, "ca-cert") == 0)
 189         index = CONFIG_BLOB_CA_CERT;
 190     else
 191         return NULL;
 192
 193     return &gssCtx->initiatorCtx.configBlobs[index];
 194 }
 195
 196 static void
 197 peerNotifyPending(void *ctx GSSEAP_UNUSED)
 198 {
 199 }
 200
 201 static struct eapol_callbacks gssEapPolicyCallbacks = {
 202     peerGetConfig,
 203     peerGetBool,
 204     peerSetBool,
 205     peerGetInt,
 206     peerSetInt,
 207     peerGetEapReqData,
 208     peerSetConfigBlob,
 209     peerGetConfigBlob,
 210     peerNotifyPending,
 211 };
 212
 213 extern int wpa_debug_level;
 214
 215 #define CHBIND_SERVICE_NAME_FLAG        0x01
 216 #define CHBIND_HOST_NAME_FLAG           0x02
 217 #define CHBIND_SERVICE_SPECIFIC_FLAG    0x04
 218 #define CHBIND_REALM_NAME_FLAG          0x08
 219
 220 static OM_uint32
 221 peerInitEapChannelBinding(OM_uint32 *minor, gss_ctx_id_t ctx)
 222 {
 223     struct wpabuf *buf = NULL;
 224     unsigned int chbindReqFlags = 0;
 225     krb5_principal princ = NULL;
 226     gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
 227     OM_uint32 major = GSS_S_COMPLETE;
 228     krb5_context krbContext = NULL;
 229
 230     /* XXX is this check redundant? */
 231     if (ctx->acceptorName == GSS_C_NO_NAME) {
 232         major = GSS_S_BAD_NAME;
 233         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 234         goto cleanup;
 235     }
 236
 237     princ = ctx->acceptorName->krbPrincipal;
 238
 239     krbPrincComponentToGssBuffer(princ, 0, &nameBuf);
 240     if (nameBuf.length > 0) {
 241         major = gssEapRadiusAddAttr(minor, &buf, PW_GSS_ACCEPTOR_SERVICE_NAME,
 242                                     0, &nameBuf);
 243         if (GSS_ERROR(major))
 244             goto cleanup;
 245
 246         chbindReqFlags |= CHBIND_SERVICE_NAME_FLAG;
 247     }
 248
 249     krbPrincComponentToGssBuffer(princ, 1, &nameBuf);
 250     if (nameBuf.length > 0) {
 251         major = gssEapRadiusAddAttr(minor, &buf, PW_GSS_ACCEPTOR_HOST_NAME,
 252                                     0, &nameBuf);
 253         if (GSS_ERROR(major))
 254             goto cleanup;
 255
 256         chbindReqFlags |= CHBIND_HOST_NAME_FLAG;
 257     }
 258
 259     GSSEAP_KRB_INIT(&krbContext);
 260
 261     *minor = krbPrincUnparseServiceSpecifics(krbContext, princ, &nameBuf);
 262     if (*minor != 0)
 263         goto cleanup;
 264
 265     if (nameBuf.length > 0) {
 266         major = gssEapRadiusAddAttr(minor, &buf,
 267                                     PW_GSS_ACCEPTOR_SERVICE_SPECIFICS,
 268                                     0, &nameBuf);
 269         if (GSS_ERROR(major))
 270             goto cleanup;
 271
 272         chbindReqFlags |= CHBIND_SERVICE_SPECIFIC_FLAG;
 273     }
 274
 275     krbFreeUnparsedName(krbContext, &nameBuf);
 276     krbPrincRealmToGssBuffer(princ, &nameBuf);
 277
 278     if (nameBuf.length > 0) {
 279         major = gssEapRadiusAddAttr(minor, &buf,
 280                                     PW_GSS_ACCEPTOR_REALM_NAME,
 281                                     0, &nameBuf);
 282         if (GSS_ERROR(major))
 283             goto cleanup;
 284
 285         chbindReqFlags |= CHBIND_REALM_NAME_FLAG;
 286     }
 287
 288     if (chbindReqFlags == 0) {
 289         major = GSS_S_BAD_NAME;
 290         *minor = GSSEAP_BAD_ACCEPTOR_NAME;
 291         goto cleanup;
 292     }
 293
 294     ctx->initiatorCtx.chbindData = buf;
 295     ctx->initiatorCtx.chbindReqFlags = chbindReqFlags;
 296
 297     buf = NULL;
 298
 299     major = GSS_S_COMPLETE;
 300     *minor = 0;
 301
 302 cleanup:
 303     /*namebuf is freed when used and may be left with a unowned pointer*/
 304     wpabuf_free(buf);
 305
 306     return major;
 307 }
 308
 309 static void
 310 peerProcessChbindResponse(void *context, int code, int nsid,
 311                           u8 *data, size_t len)
 312 {
 313     radius_parser msg;
 314     gss_ctx_id_t ctx = (gss_ctx_id_t )context;
 315     void *vsadata;
 316     u8 type;
 317     u32 vendor_id;
 318     u32 chbindRetFlags = 0;
 319     size_t vsadata_len;
 320
 321     if (nsid != CHBIND_NSID_RADIUS)
 322         return;
 323
 324     if (data == NULL)
 325         return;
 326     msg = radius_parser_start(data, len);
 327     if (msg == NULL)
 328         return;
 329
 330     while (radius_parser_parse_tlv(msg, &type, &vendor_id, &vsadata,
 331                                    &vsadata_len) == 0) {
 332         switch (type) {
 333         case PW_GSS_ACCEPTOR_SERVICE_NAME:
 334             chbindRetFlags |= CHBIND_SERVICE_NAME_FLAG;
 335             break;
 336         case PW_GSS_ACCEPTOR_HOST_NAME:
 337             chbindRetFlags |= CHBIND_HOST_NAME_FLAG;
 338             break;
 339         case PW_GSS_ACCEPTOR_SERVICE_SPECIFICS:
 340             chbindRetFlags |= CHBIND_SERVICE_SPECIFIC_FLAG;
 341             break;
 342         case PW_GSS_ACCEPTOR_REALM_NAME:
 343             chbindRetFlags |= CHBIND_REALM_NAME_FLAG;
 344             break;
 345         }
 346     }
 347
 348     radius_parser_finish(msg);
 349
 350     if (code == CHBIND_CODE_SUCCESS &&
 351         ((chbindRetFlags & ctx->initiatorCtx.chbindReqFlags) == ctx->initiatorCtx.chbindReqFlags)) {
 352         ctx->flags |= CTX_FLAG_EAP_CHBIND_ACCEPT;
 353         ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
 354     } /* else log failures? */
 355 }
 356
 357 static OM_uint32
 358 peerConfigInit(OM_uint32 *minor, gss_ctx_id_t ctx)
 359 {
 360     OM_uint32 major;
 361     krb5_context krbContext;
 362     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 363     struct wpa_config_blob *configBlobs = ctx->initiatorCtx.configBlobs;
 364     gss_buffer_desc identity = GSS_C_EMPTY_BUFFER;
 365     gss_buffer_desc realm = GSS_C_EMPTY_BUFFER;
 366     gss_cred_id_t cred = ctx->cred;
 367     char *debug_file = NULL;
 368
 369     eapPeerConfig->identity = NULL;
 370     eapPeerConfig->identity_len = 0;
 371     eapPeerConfig->anonymous_identity = NULL;
 372     eapPeerConfig->anonymous_identity_len = 0;
 373     eapPeerConfig->password = NULL;
 374     eapPeerConfig->password_len = 0;
 375     eapPeerConfig->eap_methods = (struct eap_method_type *) allowed_eap_method_types;
 376
 377     GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
 378
 379     GSSEAP_KRB_INIT(&krbContext);
 380
 381     eapPeerConfig->fragment_size = 1024;
 382     wpa_debug_level = MSG_ERROR;
 383     if ((debug_file = getenv("GSSEAP_TRACE")) != NULL) {
 384             wpa_debug_open_file(debug_file);
 385             wpa_debug_level = 0;
 386         }
 387
 388     GSSEAP_ASSERT(cred->name != GSS_C_NO_NAME);
 389
 390     if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
 391         *minor = GSSEAP_BAD_INITIATOR_NAME;
 392         return GSS_S_BAD_NAME;
 393     }
 394
 395     /* identity */
 396     major = gssEapDisplayName(minor, cred->name, &identity, NULL);
 397     if (GSS_ERROR(major))
 398         return major;
 399
 400     eapPeerConfig->identity = (unsigned char *)identity.value;
 401     eapPeerConfig->identity_len = identity.length;
 402
 403     krbPrincRealmToGssBuffer(cred->name->krbPrincipal, &realm);
 404
 405     /* anonymous_identity */
 406     eapPeerConfig->anonymous_identity = GSSEAP_MALLOC(realm.length + 2);
 407     if (eapPeerConfig->anonymous_identity == NULL) {
 408         *minor = ENOMEM;
 409         return GSS_S_FAILURE;
 410     }
 411
 412     eapPeerConfig->anonymous_identity[0] = '@';
 413     memcpy(eapPeerConfig->anonymous_identity + 1, realm.value, realm.length);
 414     eapPeerConfig->anonymous_identity[1 + realm.length] = '\0';
 415     eapPeerConfig->anonymous_identity_len = 1 + realm.length;
 416
 417     /* password */
 418     if ((cred->flags & CRED_FLAG_CERTIFICATE) == 0) {
 419         eapPeerConfig->password = (unsigned char *)cred->password.value;
 420         eapPeerConfig->password_len = cred->password.length;
 421     }
 422
 423     /* certs */
 424     eapPeerConfig->ca_cert = (unsigned char *)cred->caCertificate.value;
 425     eapPeerConfig->subject_match = (unsigned char *)cred->subjectNameConstraint.value;
 426     eapPeerConfig->altsubject_match = (unsigned char *)cred->subjectAltNameConstraint.value;
 427     configBlobs[CONFIG_BLOB_CA_CERT].data = cred->caCertificateBlob.value;
 428     configBlobs[CONFIG_BLOB_CA_CERT].len = cred->caCertificateBlob.length;
 429
 430     /* eap channel binding */
 431     if (ctx->initiatorCtx.chbindData != NULL) {
 432         struct eap_peer_chbind_config *chbind_config =
 433             (struct eap_peer_chbind_config *)GSSEAP_MALLOC(sizeof(struct eap_peer_chbind_config));
 434         if (chbind_config == NULL) {
 435             *minor = ENOMEM;
 436             return GSS_S_FAILURE;
 437         }
 438
 439         chbind_config->req_data = wpabuf_mhead_u8(ctx->initiatorCtx.chbindData);
 440         chbind_config->req_data_len = wpabuf_len(ctx->initiatorCtx.chbindData);
 441         chbind_config->nsid = CHBIND_NSID_RADIUS;
 442         chbind_config->response_cb = &peerProcessChbindResponse;
 443         chbind_config->ctx = ctx;
 444         eapPeerConfig->chbind_config = chbind_config;
 445         eapPeerConfig->chbind_config_len = 1;
 446     } else {
 447         eapPeerConfig->chbind_config = NULL;
 448         eapPeerConfig->chbind_config_len = 0;
 449     }
 450     if (cred->flags & CRED_FLAG_CERTIFICATE) {
 451         /*
 452          * CRED_FLAG_CONFIG_BLOB is an internal flag which will be used in the
 453          * future to directly pass certificate and private key data to the
 454          * EAP implementation, rather than an indirected string pointer.
 455          */
 456         if (cred->flags & CRED_FLAG_CONFIG_BLOB) {
 457             eapPeerConfig->client_cert = (unsigned char *)"blob://client-cert";
 458             configBlobs[CONFIG_BLOB_CLIENT_CERT].data = cred->clientCertificate.value;
 459             configBlobs[CONFIG_BLOB_CLIENT_CERT].len  = cred->clientCertificate.length;
 460
 461             eapPeerConfig->client_cert = (unsigned char *)"blob://private-key";
 462             configBlobs[CONFIG_BLOB_PRIVATE_KEY].data = cred->clientCertificate.value;
 463             configBlobs[CONFIG_BLOB_PRIVATE_KEY].len  = cred->privateKey.length;
 464         } else {
 465             eapPeerConfig->client_cert = (unsigned char *)cred->clientCertificate.value;
 466             eapPeerConfig->private_key = (unsigned char *)cred->privateKey.value;
 467         }
 468         eapPeerConfig->private_key_passwd = (unsigned char *)cred->password.value;
 469     }
 470
 471     *minor = 0;
 472     return GSS_S_COMPLETE;
 473 }
 474
 475 static OM_uint32
 476 peerConfigFree(OM_uint32 *minor,
 477                gss_ctx_id_t ctx)
 478 {
 479     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 480
 481     if (eapPeerConfig->identity != NULL) {
 482         GSSEAP_FREE(eapPeerConfig->identity);
 483         eapPeerConfig->identity = NULL;
 484         eapPeerConfig->identity_len = 0;
 485     }
 486
 487     if (eapPeerConfig->anonymous_identity != NULL) {
 488         GSSEAP_FREE(eapPeerConfig->anonymous_identity);
 489         eapPeerConfig->anonymous_identity = NULL;
 490         eapPeerConfig->anonymous_identity_len = 0;
 491     }
 492
 493     *minor = 0;
 494     return GSS_S_COMPLETE;
 495 }
 496
 497 /*
 498  * Mark an initiator context as ready for cryptographic operations
 499  */
 500 static OM_uint32
 501 initReady(OM_uint32 *minor, gss_ctx_id_t ctx)
 502 {
 503     OM_uint32 major;
 504     const unsigned char *key;
 505     size_t keyLength;
 506
 507     /* Cache encryption type derived from selected mechanism OID */
 508     major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
 509     if (GSS_ERROR(major))
 510         return major;
 511
 512     if (!eap_key_available(ctx->initiatorCtx.eap)) {
 513         *minor = GSSEAP_KEY_UNAVAILABLE;
 514         return GSS_S_UNAVAILABLE;
 515     }
 516
 517     key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
 518
 519     if (keyLength < EAP_EMSK_LEN) {
 520         *minor = GSSEAP_KEY_TOO_SHORT;
 521         return GSS_S_UNAVAILABLE;
 522     }
 523
 524     major = gssEapDeriveRfc3961Key(minor,
 525                                    &key[EAP_EMSK_LEN / 2],
 526                                    EAP_EMSK_LEN / 2,
 527                                    ctx->encryptionType,
 528                                    &ctx->rfc3961Key);
 529        if (GSS_ERROR(major))
 530            return major;
 531
 532     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 533                                       &ctx->checksumType);
 534     if (GSS_ERROR(major))
 535         return major;
 536
 537     major = sequenceInit(minor,
 538                          &ctx->seqState,
 539                          ctx->recvSeq,
 540                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 541                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 542                          TRUE);
 543     if (GSS_ERROR(major))
 544         return major;
 545
 546     *minor = 0;
 547     return GSS_S_COMPLETE;
 548 }
 549
 550 static OM_uint32
 551 initBegin(OM_uint32 *minor,
 552           gss_ctx_id_t ctx,
 553           gss_name_t target,
 554           gss_OID mech,
 555           OM_uint32 reqFlags GSSEAP_UNUSED,
 556           OM_uint32 timeReq,
 557           gss_channel_bindings_t chanBindings GSSEAP_UNUSED)
 558 {
 559     OM_uint32 major;
 560     gss_cred_id_t cred = ctx->cred;
 561
 562     GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
 563
 564     if (cred->expiryTime)
 565         ctx->expiryTime = cred->expiryTime;
 566     else if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
 567         ctx->expiryTime = 0;
 568     else
 569         ctx->expiryTime = time(NULL) + timeReq;
 570
 571     /*
 572      * The credential mutex protects its name, however we need to
 573      * explicitly lock the acceptor name (unlikely as it may be
 574      * that it has attributes set on it).
 575      */
 576     major = gssEapDuplicateName(minor, cred->name, &ctx->initiatorName);
 577     if (GSS_ERROR(major))
 578         return major;
 579
 580     if (target != GSS_C_NO_NAME) {
 581         GSSEAP_MUTEX_LOCK(&target->mutex);
 582
 583         major = gssEapDuplicateName(minor, target, &ctx->acceptorName);
 584         if (GSS_ERROR(major)) {
 585             GSSEAP_MUTEX_UNLOCK(&target->mutex);
 586             return major;
 587         }
 588
 589         GSSEAP_MUTEX_UNLOCK(&target->mutex);
 590     }
 591
 592     major = gssEapCanonicalizeOid(minor,
 593                                   mech,
 594                                   OID_FLAG_NULL_VALID | OID_FLAG_MAP_NULL_TO_DEFAULT_MECH,
 595                                   &ctx->mechanismUsed);
 596     if (GSS_ERROR(major))
 597         return major;
 598
 599     /* If credentials were provided, check they're usable with this mech */
 600     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 601         *minor = GSSEAP_CRED_MECH_MISMATCH;
 602         return GSS_S_BAD_MECH;
 603     }
 604
 605     *minor = 0;
 606     return GSS_S_COMPLETE;
 607 }
 608
 609 static OM_uint32
 610 eapGssSmInitError(OM_uint32 *minor,
 611                   gss_cred_id_t cred GSSEAP_UNUSED,
 612                   gss_ctx_id_t ctx GSSEAP_UNUSED,
 613                   gss_name_t target GSSEAP_UNUSED,
 614                   gss_OID mech GSSEAP_UNUSED,
 615                   OM_uint32 reqFlags GSSEAP_UNUSED,
 616                   OM_uint32 timeReq GSSEAP_UNUSED,
 617                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 618                   gss_buffer_t inputToken,
 619                   gss_buffer_t outputToken GSSEAP_UNUSED,
 620                   OM_uint32 *smFlags GSSEAP_UNUSED)
 621 {
 622     OM_uint32 major;
 623     unsigned char *p;
 624
 625     if (inputToken->length < 8) {
 626         *minor = GSSEAP_TOK_TRUNC;
 627         return GSS_S_DEFECTIVE_TOKEN;
 628     }
 629
 630     p = (unsigned char *)inputToken->value;
 631
 632     major = load_uint32_be(&p[0]);
 633     *minor =  load_uint32_be(&p[4]);
 634     if ((*minor >0) && (*minor < 128))
 635       * minor += ERROR_TABLE_BASE_eapg;
 636     else *minor = 0;
 637
 638     if (!GSS_ERROR(major) || !IS_WIRE_ERROR(*minor)) {
 639         major = GSS_S_FAILURE;
 640         *minor = GSSEAP_BAD_ERROR_TOKEN;
 641     }
 642
 643     GSSEAP_ASSERT(GSS_ERROR(major));
 644
 645     return major;
 646 }
 647
 648 #ifdef GSSEAP_ENABLE_REAUTH
 649 static OM_uint32
 650 eapGssSmInitGssReauth(OM_uint32 *minor,
 651                       gss_cred_id_t cred,
 652                       gss_ctx_id_t ctx,
 653                       gss_name_t target,
 654                       gss_OID mech GSSEAP_UNUSED,
 655                       OM_uint32 reqFlags,
 656                       OM_uint32 timeReq,
 657                       gss_channel_bindings_t chanBindings,
 658                       gss_buffer_t inputToken,
 659                       gss_buffer_t outputToken,
 660                       OM_uint32 *smFlags GSSEAP_UNUSED)
 661 {
 662     OM_uint32 major, tmpMinor;
 663     gss_name_t mechTarget = GSS_C_NO_NAME;
 664     gss_OID actualMech = GSS_C_NO_OID;
 665     OM_uint32 gssFlags, timeRec;
 666
 667     /*
 668      * Here we use the passed in credential handle because the resolved
 669      * context credential does not currently have the reauth creds.
 670      */
 671     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
 672         if (!gssEapCanReauthP(cred, target, timeReq))
 673             return GSS_S_CONTINUE_NEEDED;
 674
 675         ctx->flags |= CTX_FLAG_KRB_REAUTH;
 676     } else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
 677         major = GSS_S_DEFECTIVE_TOKEN;
 678         *minor = GSSEAP_WRONG_ITOK;
 679         goto cleanup;
 680     }
 681
 682     GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
 683
 684     major = gssEapMechToGlueName(minor, target, &mechTarget);
 685     if (GSS_ERROR(major))
 686         goto cleanup;
 687
 688     major = gssInitSecContext(minor,
 689                               cred->reauthCred,
 690                               &ctx->reauthCtx,
 691                               mechTarget,
 692                               (gss_OID)gss_mech_krb5,
 693                               reqFlags | GSS_C_MUTUAL_FLAG,
 694                               timeReq,
 695                               chanBindings,
 696                               inputToken,
 697                               &actualMech,
 698                               outputToken,
 699                               &gssFlags,
 700                               &timeRec);
 701     if (GSS_ERROR(major))
 702         goto cleanup;
 703
 704     ctx->gssFlags = gssFlags;
 705
 706     if (major == GSS_S_COMPLETE) {
 707         GSSEAP_ASSERT(GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE);
 708
 709         major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
 710         if (GSS_ERROR(major))
 711             goto cleanup;
 712         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 713     } else {
 714         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
 715     }
 716
 717 cleanup:
 718     gssReleaseName(&tmpMinor, &mechTarget);
 719
 720     return major;
 721 }
 722 #endif /* GSSEAP_ENABLE_REAUTH */
 723
 724 #ifdef GSSEAP_DEBUG
 725 static OM_uint32
 726 eapGssSmInitVendorInfo(OM_uint32 *minor,
 727                        gss_cred_id_t cred GSSEAP_UNUSED,
 728                        gss_ctx_id_t ctx GSSEAP_UNUSED,
 729                        gss_name_t target GSSEAP_UNUSED,
 730                        gss_OID mech GSSEAP_UNUSED,
 731                        OM_uint32 reqFlags GSSEAP_UNUSED,
 732                        OM_uint32 timeReq GSSEAP_UNUSED,
 733                        gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 734                        gss_buffer_t inputToken GSSEAP_UNUSED,
 735                        gss_buffer_t outputToken,
 736                        OM_uint32 *smFlags GSSEAP_UNUSED)
 737 {
 738     OM_uint32 major;
 739
 740     major = makeStringBuffer(minor, "JANET(UK)", outputToken);
 741     if (GSS_ERROR(major))
 742         return major;
 743
 744     return GSS_S_CONTINUE_NEEDED;
 745 }
 746 #endif
 747
 748 static OM_uint32
 749 eapGssSmInitAcceptorName(OM_uint32 *minor,
 750                          gss_cred_id_t cred GSSEAP_UNUSED,
 751                          gss_ctx_id_t ctx,
 752                          gss_name_t target GSSEAP_UNUSED,
 753                          gss_OID mech GSSEAP_UNUSED,
 754                          OM_uint32 reqFlags GSSEAP_UNUSED,
 755                          OM_uint32 timeReq GSSEAP_UNUSED,
 756                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 757                          gss_buffer_t inputToken GSSEAP_UNUSED,
 758                          gss_buffer_t outputToken,
 759                          OM_uint32 *smFlags GSSEAP_UNUSED)
 760 {
 761     OM_uint32 major;
 762
 763     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL &&
 764         ctx->acceptorName != GSS_C_NO_NAME) {
 765
 766         /* Send desired target name to acceptor */
 767         major = gssEapDisplayName(minor, ctx->acceptorName,
 768                                   outputToken, NULL);
 769         if (GSS_ERROR(major))
 770             return major;
 771     } else if (inputToken != GSS_C_NO_BUFFER) {
 772         OM_uint32 tmpMinor;
 773         gss_name_t nameHint;
 774         int equal;
 775
 776         /* Accept target name hint from acceptor or verify acceptor */
 777         major = gssEapImportName(minor, inputToken,
 778                                  GSS_C_NT_USER_NAME,
 779                                  ctx->mechanismUsed,
 780                                  &nameHint);
 781         if (GSS_ERROR(major))
 782             return major;
 783
 784         if (ctx->acceptorName != GSS_C_NO_NAME) {
 785             /* verify name hint matched asserted acceptor name  */
 786             major = gssEapCompareName(minor,
 787                                       nameHint,
 788                                       ctx->acceptorName,
 789                                       COMPARE_NAME_FLAG_IGNORE_EMPTY_REALMS,
 790                                       &equal);
 791             if (GSS_ERROR(major)) {
 792                 gssEapReleaseName(&tmpMinor, &nameHint);
 793                 return major;
 794             }
 795
 796             gssEapReleaseName(&tmpMinor, &nameHint);
 797
 798             if (!equal) {
 799                 *minor = GSSEAP_WRONG_ACCEPTOR_NAME;
 800                 return GSS_S_DEFECTIVE_TOKEN;
 801             }
 802         } else { /* acceptor name is no_name */
 803             /* accept acceptor name hint */
 804             ctx->acceptorName = nameHint;
 805             nameHint = GSS_C_NO_NAME;
 806         }
 807     }
 808
 809
 810     /*
 811      * Currently, other parts of the code assume that the acceptor name
 812      * is available, hence this check.
 813      */
 814     if (ctx->acceptorName == GSS_C_NO_NAME) {
 815         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 816         return GSS_S_FAILURE;
 817     }
 818
 819     /*
 820      * Generate channel binding data
 821      */
 822     if (ctx->initiatorCtx.chbindData == NULL) {
 823         major = peerInitEapChannelBinding(minor, ctx);
 824         if (GSS_ERROR(major))
 825             return major;
 826     }
 827
 828     return GSS_S_CONTINUE_NEEDED;
 829 }
 830
 831 static OM_uint32
 832 eapGssSmInitIdentity(OM_uint32 *minor,
 833                      gss_cred_id_t cred GSSEAP_UNUSED,
 834                      gss_ctx_id_t ctx,
 835                      gss_name_t target GSSEAP_UNUSED,
 836                      gss_OID mech GSSEAP_UNUSED,
 837                      OM_uint32 reqFlags GSSEAP_UNUSED,
 838                      OM_uint32 timeReq GSSEAP_UNUSED,
 839                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 840                      gss_buffer_t inputToken GSSEAP_UNUSED,
 841                      gss_buffer_t outputToken GSSEAP_UNUSED,
 842                      OM_uint32 *smFlags)
 843 {
 844     struct eap_config eapConfig;
 845
 846 #ifdef GSSEAP_ENABLE_REAUTH
 847     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE) {
 848         OM_uint32 tmpMinor;
 849
 850         /* server didn't support reauthentication, sent EAP request */
 851         gssDeleteSecContext(&tmpMinor, &ctx->reauthCtx, GSS_C_NO_BUFFER);
 852         ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
 853         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
 854     } else
 855 #endif
 856         *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 857
 858     GSSEAP_ASSERT((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
 859     GSSEAP_ASSERT(inputToken == GSS_C_NO_BUFFER);
 860
 861     memset(&eapConfig, 0, sizeof(eapConfig));
 862
 863     ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
 864                                              &gssEapPolicyCallbacks,
 865                                              ctx,
 866                                              &eapConfig);
 867     if (ctx->initiatorCtx.eap == NULL) {
 868         *minor = GSSEAP_PEER_SM_INIT_FAILURE;
 869         return GSS_S_FAILURE;
 870     }
 871
 872     ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
 873
 874     /* poke EAP state machine */
 875     if (eap_peer_sm_step(ctx->initiatorCtx.eap) != 0) {
 876         *minor = GSSEAP_PEER_SM_STEP_FAILURE;
 877         return GSS_S_FAILURE;
 878     }
 879
 880     GSSEAP_SM_TRANSITION_NEXT(ctx);
 881
 882     *minor = 0;
 883
 884     return GSS_S_CONTINUE_NEEDED;
 885 }
 886
 887 static OM_uint32
 888 eapGssSmInitAuthenticate(OM_uint32 *minor,
 889                          gss_cred_id_t cred GSSEAP_UNUSED,
 890                          gss_ctx_id_t ctx,
 891                          gss_name_t target GSSEAP_UNUSED,
 892                          gss_OID mech GSSEAP_UNUSED,
 893                          OM_uint32 reqFlags GSSEAP_UNUSED,
 894                          OM_uint32 timeReq GSSEAP_UNUSED,
 895                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 896                          gss_buffer_t inputToken GSSEAP_UNUSED,
 897                          gss_buffer_t outputToken,
 898                          OM_uint32 *smFlags)
 899 {
 900     OM_uint32 major;
 901     OM_uint32 tmpMinor;
 902     struct wpabuf *resp = NULL;
 903
 904     *minor = 0;
 905
 906     GSSEAP_ASSERT(inputToken != GSS_C_NO_BUFFER);
 907
 908     major = peerConfigInit(minor, ctx);
 909     if (GSS_ERROR(major))
 910         goto cleanup;
 911
 912     GSSEAP_ASSERT(ctx->initiatorCtx.eap != NULL);
 913     GSSEAP_ASSERT(ctx->flags & CTX_FLAG_EAP_PORT_ENABLED);
 914
 915     ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
 916
 917     wpabuf_set(&ctx->initiatorCtx.reqData,
 918                inputToken->value, inputToken->length);
 919
 920     major = GSS_S_CONTINUE_NEEDED;
 921
 922     eap_peer_sm_step(ctx->initiatorCtx.eap);
 923     if (ctx->flags & CTX_FLAG_EAP_RESP) {
 924         ctx->flags &= ~(CTX_FLAG_EAP_RESP);
 925
 926         resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
 927     } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
 928         major = initReady(minor, ctx);
 929         if (GSS_ERROR(major))
 930             goto cleanup;
 931
 932         ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
 933         major = GSS_S_CONTINUE_NEEDED;
 934         GSSEAP_SM_TRANSITION_NEXT(ctx);
 935     } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
 936         major = GSS_S_DEFECTIVE_CREDENTIAL;
 937         *minor = GSSEAP_PEER_AUTH_FAILURE;
 938     } else {
 939         major = GSS_S_DEFECTIVE_TOKEN;
 940         *minor = GSSEAP_PEER_BAD_MESSAGE;
 941     }
 942
 943 cleanup:
 944     if (resp != NULL) {
 945         OM_uint32 tmpMajor;
 946         gss_buffer_desc respBuf;
 947
 948         GSSEAP_ASSERT(major == GSS_S_CONTINUE_NEEDED);
 949
 950         respBuf.length = wpabuf_len(resp);
 951         respBuf.value = (void *)wpabuf_head(resp);
 952
 953         tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
 954         if (GSS_ERROR(tmpMajor)) {
 955             major = tmpMajor;
 956             *minor = tmpMinor;
 957         }
 958
 959         *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 960     }
 961
 962     wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
 963     peerConfigFree(&tmpMinor, ctx);
 964
 965     return major;
 966 }
 967
 968 static OM_uint32
 969 eapGssSmInitGssFlags(OM_uint32 *minor,
 970                      gss_cred_id_t cred GSSEAP_UNUSED,
 971                      gss_ctx_id_t ctx,
 972                      gss_name_t target GSSEAP_UNUSED,
 973                      gss_OID mech GSSEAP_UNUSED,
 974                      OM_uint32 reqFlags GSSEAP_UNUSED,
 975                      OM_uint32 timeReq GSSEAP_UNUSED,
 976                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 977                      gss_buffer_t inputToken GSSEAP_UNUSED,
 978                      gss_buffer_t outputToken,
 979                      OM_uint32 *smFlags GSSEAP_UNUSED)
 980 {
 981     unsigned char wireFlags[4];
 982     gss_buffer_desc flagsBuf;
 983
 984     /*
 985      * As a temporary measure, force mutual authentication until channel binding is
 986      * more widely deployed.
 987      */
 988     ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
 989     store_uint32_be(ctx->gssFlags & GSSEAP_WIRE_FLAGS_MASK, wireFlags);
 990
 991     flagsBuf.length = sizeof(wireFlags);
 992     flagsBuf.value = wireFlags;
 993
 994     return duplicateBuffer(minor, &flagsBuf, outputToken);
 995 }
 996
 997 static OM_uint32
 998 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
 999                                gss_cred_id_t cred GSSEAP_UNUSED,
1000                                gss_ctx_id_t ctx,
1001                                gss_name_t target GSSEAP_UNUSED,
1002                                gss_OID mech GSSEAP_UNUSED,
1003                                OM_uint32 reqFlags GSSEAP_UNUSED,
1004                                OM_uint32 timeReq GSSEAP_UNUSED,
1005                                gss_channel_bindings_t chanBindings,
1006                                gss_buffer_t inputToken GSSEAP_UNUSED,
1007                                gss_buffer_t outputToken,
1008                                OM_uint32 *smFlags)
1009 {
1010     OM_uint32 major;
1011     krb5_error_code code;
1012     krb5_context krbContext;
1013     krb5_data data;
1014     krb5_checksum cksum;
1015     gss_buffer_desc cksumBuffer;
1016
1017     if (chanBindings == GSS_C_NO_CHANNEL_BINDINGS ||
1018         chanBindings->application_data.length == 0)
1019         return GSS_S_CONTINUE_NEEDED;
1020
1021     GSSEAP_KRB_INIT(&krbContext);
1022
1023     KRB_DATA_INIT(&data);
1024
1025     gssBufferToKrbData(&chanBindings->application_data, &data);
1026
1027     code = krb5_c_make_checksum(krbContext, ctx->checksumType,
1028                                 &ctx->rfc3961Key,
1029                                 KEY_USAGE_GSSEAP_CHBIND_MIC,
1030                                 &data, &cksum);
1031     if (code != 0) {
1032         *minor = code;
1033         return GSS_S_FAILURE;
1034     }
1035
1036     cksumBuffer.length = KRB_CHECKSUM_LENGTH(&cksum);
1037     cksumBuffer.value  = KRB_CHECKSUM_DATA(&cksum);
1038
1039     major = duplicateBuffer(minor, &cksumBuffer, outputToken);
1040     if (GSS_ERROR(major)) {
1041         krb5_free_checksum_contents(krbContext, &cksum);
1042         return major;
1043     }
1044
1045     *minor = 0;
1046     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
1047
1048     krb5_free_checksum_contents(krbContext, &cksum);
1049
1050     return GSS_S_CONTINUE_NEEDED;
1051 }
1052
1053 static OM_uint32
1054 eapGssSmInitInitiatorMIC(OM_uint32 *minor,
1055                          gss_cred_id_t cred GSSEAP_UNUSED,
1056                          gss_ctx_id_t ctx,
1057                          gss_name_t target GSSEAP_UNUSED,
1058                          gss_OID mech GSSEAP_UNUSED,
1059                          OM_uint32 reqFlags GSSEAP_UNUSED,
1060                          OM_uint32 timeReq GSSEAP_UNUSED,
1061                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1062                          gss_buffer_t inputToken GSSEAP_UNUSED,
1063                          gss_buffer_t outputToken,
1064                          OM_uint32 *smFlags)
1065 {
1066     OM_uint32 major;
1067
1068     major = gssEapMakeTokenMIC(minor, ctx, outputToken);
1069     if (GSS_ERROR(major))
1070         return major;
1071
1072     GSSEAP_SM_TRANSITION_NEXT(ctx);
1073
1074     *minor = 0;
1075     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
1076
1077     return GSS_S_CONTINUE_NEEDED;
1078 }
1079
1080 #ifdef GSSEAP_ENABLE_REAUTH
1081 static OM_uint32
1082 eapGssSmInitReauthCreds(OM_uint32 *minor,
1083                         gss_cred_id_t cred,
1084                         gss_ctx_id_t ctx,
1085                         gss_name_t target GSSEAP_UNUSED,
1086                         gss_OID mech GSSEAP_UNUSED,
1087                         OM_uint32 reqFlags GSSEAP_UNUSED,
1088                         OM_uint32 timeReq GSSEAP_UNUSED,
1089                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1090                         gss_buffer_t inputToken,
1091                         gss_buffer_t outputToken GSSEAP_UNUSED,
1092                         OM_uint32 *smFlags GSSEAP_UNUSED)
1093 {
1094     OM_uint32 major;
1095
1096     if (ctx->gssFlags & GSS_C_MUTUAL_FLAG) {
1097         major = gssEapStoreReauthCreds(minor, ctx, cred, inputToken);
1098         if (GSS_ERROR(major))
1099             return major;
1100     }
1101
1102     *minor = 0;
1103     return GSS_S_CONTINUE_NEEDED;
1104 }
1105 #endif /* GSSEAP_ENABLE_REAUTH */
1106
1107 static OM_uint32
1108 eapGssSmInitAcceptorMIC(OM_uint32 *minor,
1109                         gss_cred_id_t cred GSSEAP_UNUSED,
1110                         gss_ctx_id_t ctx,
1111                         gss_name_t target GSSEAP_UNUSED,
1112                         gss_OID mech GSSEAP_UNUSED,
1113                         OM_uint32 reqFlags GSSEAP_UNUSED,
1114                         OM_uint32 timeReq GSSEAP_UNUSED,
1115                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1116                         gss_buffer_t inputToken,
1117                         gss_buffer_t outputToken GSSEAP_UNUSED,
1118                         OM_uint32 *smFlags GSSEAP_UNUSED)
1119 {
1120     OM_uint32 major;
1121
1122     major = gssEapVerifyTokenMIC(minor, ctx, inputToken);
1123     if (GSS_ERROR(major))
1124         return major;
1125
1126     GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
1127
1128     *minor = 0;
1129
1130     return GSS_S_COMPLETE;
1131 }
1132
1133 static struct gss_eap_sm eapGssInitiatorSm[] = {
1134     {
1135         ITOK_TYPE_CONTEXT_ERR,
1136         ITOK_TYPE_NONE,
1137         GSSEAP_STATE_ALL & ~(GSSEAP_STATE_INITIAL),
1138         0,
1139         eapGssSmInitError
1140     },
1141     {
1142         ITOK_TYPE_ACCEPTOR_NAME_RESP,
1143         ITOK_TYPE_ACCEPTOR_NAME_REQ,
1144         GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE |
1145         GSSEAP_STATE_ACCEPTOR_EXTS,
1146         0,
1147         eapGssSmInitAcceptorName
1148     },
1149 #ifdef GSSEAP_DEBUG
1150     {
1151         ITOK_TYPE_NONE,
1152         ITOK_TYPE_VENDOR_INFO,
1153         GSSEAP_STATE_INITIAL,
1154         0,
1155         eapGssSmInitVendorInfo
1156     },
1157 #endif
1158 #ifdef GSSEAP_ENABLE_REAUTH
1159     {
1160         ITOK_TYPE_REAUTH_RESP,
1161         ITOK_TYPE_REAUTH_REQ,
1162         GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
1163         0,
1164         eapGssSmInitGssReauth
1165     },
1166 #endif
1167     {
1168         ITOK_TYPE_NONE,
1169         ITOK_TYPE_NONE,
1170 #ifdef GSSEAP_ENABLE_REAUTH
1171         GSSEAP_STATE_REAUTHENTICATE |
1172 #endif
1173         GSSEAP_STATE_INITIAL,
1174         SM_ITOK_FLAG_REQUIRED,
1175         eapGssSmInitIdentity
1176     },
1177     {
1178         ITOK_TYPE_EAP_REQ,
1179         ITOK_TYPE_EAP_RESP,
1180         GSSEAP_STATE_AUTHENTICATE,
1181         SM_ITOK_FLAG_REQUIRED,
1182         eapGssSmInitAuthenticate
1183     },
1184     {
1185         ITOK_TYPE_NONE,
1186         ITOK_TYPE_GSS_FLAGS,
1187         GSSEAP_STATE_INITIATOR_EXTS,
1188         0,
1189         eapGssSmInitGssFlags
1190     },
1191     {
1192         ITOK_TYPE_NONE,
1193         ITOK_TYPE_GSS_CHANNEL_BINDINGS,
1194         GSSEAP_STATE_INITIATOR_EXTS,
1195         0,
1196         eapGssSmInitGssChannelBindings
1197     },
1198     {
1199         ITOK_TYPE_NONE,
1200         ITOK_TYPE_INITIATOR_MIC,
1201         GSSEAP_STATE_INITIATOR_EXTS,
1202         SM_ITOK_FLAG_REQUIRED,
1203         eapGssSmInitInitiatorMIC
1204     },
1205 #ifdef GSSEAP_ENABLE_REAUTH
1206     {
1207         ITOK_TYPE_REAUTH_CREDS,
1208         ITOK_TYPE_NONE,
1209         GSSEAP_STATE_ACCEPTOR_EXTS,
1210         0,
1211         eapGssSmInitReauthCreds
1212     },
1213 #endif
1214     /* other extensions go here */
1215     {
1216         ITOK_TYPE_ACCEPTOR_MIC,
1217         ITOK_TYPE_NONE,
1218         GSSEAP_STATE_ACCEPTOR_EXTS,
1219         SM_ITOK_FLAG_REQUIRED,
1220         eapGssSmInitAcceptorMIC
1221     }
1222 };
1223
1224 OM_uint32
1225 gssEapInitSecContext(OM_uint32 *minor,
1226                      gss_cred_id_t cred,
1227                      gss_ctx_id_t ctx,
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     int initialContextToken = (ctx->mechanismUsed == GSS_C_NO_OID);
1241
1242     /*
1243      * XXX is acquiring the credential lock here necessary? The password is
1244      * mutable but the contract could specify that this is not updated whilst
1245      * a context is being initialized.
1246      */
1247     if (cred != GSS_C_NO_CREDENTIAL)
1248         GSSEAP_MUTEX_LOCK(&cred->mutex);
1249
1250     if (ctx->cred == GSS_C_NO_CREDENTIAL) {
1251         major = gssEapResolveInitiatorCred(minor, cred, target_name, &ctx->cred);
1252         if (GSS_ERROR(major))
1253             goto cleanup;
1254
1255         GSSEAP_ASSERT(ctx->cred != GSS_C_NO_CREDENTIAL);
1256     }
1257
1258     GSSEAP_MUTEX_LOCK(&ctx->cred->mutex);
1259
1260     GSSEAP_ASSERT(ctx->cred->flags & CRED_FLAG_RESOLVED);
1261     GSSEAP_ASSERT(ctx->cred->flags & CRED_FLAG_INITIATE);
1262
1263     if (initialContextToken) {
1264         major = initBegin(minor, ctx, target_name, mech_type,
1265                           req_flags, time_req, input_chan_bindings);
1266         if (GSS_ERROR(major))
1267             goto cleanup;
1268     }
1269
1270     major = gssEapSmStep(minor,
1271                          cred,
1272                          ctx,
1273                          target_name,
1274                          mech_type,
1275                          req_flags,
1276                          time_req,
1277                          input_chan_bindings,
1278                          input_token,
1279                          output_token,
1280                          eapGssInitiatorSm,
1281                          sizeof(eapGssInitiatorSm) / sizeof(eapGssInitiatorSm[0]));
1282     if (GSS_ERROR(major))
1283         goto cleanup;
1284
1285     if (actual_mech_type != NULL) {
1286         OM_uint32 tmpMajor;
1287
1288         tmpMajor = gssEapCanonicalizeOid(&tmpMinor, ctx->mechanismUsed, 0, actual_mech_type);
1289         if (GSS_ERROR(tmpMajor)) {
1290             major = tmpMajor;
1291             *minor = tmpMinor;
1292             goto cleanup;
1293         }
1294     }
1295
1296     if (ret_flags != NULL)
1297         *ret_flags = ctx->gssFlags;
1298
1299     if (time_rec != NULL)
1300         gssEapContextTime(&tmpMinor, ctx, time_rec);
1301
1302     GSSEAP_ASSERT(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
1303
1304 cleanup:
1305     if (cred != GSS_C_NO_CREDENTIAL)
1306         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
1307     if (ctx->cred != GSS_C_NO_CREDENTIAL)
1308         GSSEAP_MUTEX_UNLOCK(&ctx->cred->mutex);
1309
1310     return major;
1311 }
1312
1313 OM_uint32 GSSAPI_CALLCONV
1314 gss_init_sec_context(OM_uint32 *minor,
1315                      gss_cred_id_t cred,
1316                      gss_ctx_id_t *context_handle,
1317                      gss_name_t target_name,
1318                      gss_OID mech_type,
1319                      OM_uint32 req_flags,
1320                      OM_uint32 time_req,
1321                      gss_channel_bindings_t input_chan_bindings,
1322                      gss_buffer_t input_token,
1323                      gss_OID *actual_mech_type,
1324                      gss_buffer_t output_token,
1325                      OM_uint32 *ret_flags,
1326                      OM_uint32 *time_rec)
1327 {
1328     OM_uint32 major, tmpMinor;
1329     gss_ctx_id_t ctx = *context_handle;
1330
1331     *minor = 0;
1332
1333     output_token->length = 0;
1334     output_token->value = NULL;
1335
1336     if (ctx == GSS_C_NO_CONTEXT) {
1337         if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
1338             *minor = GSSEAP_WRONG_SIZE;
1339             return GSS_S_DEFECTIVE_TOKEN;
1340         }
1341
1342         major = gssEapAllocContext(minor, &ctx);
1343         if (GSS_ERROR(major))
1344             return major;
1345
1346         ctx->flags |= CTX_FLAG_INITIATOR;
1347
1348         *context_handle = ctx;
1349     }
1350
1351     GSSEAP_MUTEX_LOCK(&ctx->mutex);
1352
1353     major = gssEapInitSecContext(minor,
1354                                  cred,
1355                                  ctx,
1356                                  target_name,
1357                                  mech_type,
1358                                  req_flags,
1359                                  time_req,
1360                                  input_chan_bindings,
1361                                  input_token,
1362                                  actual_mech_type,
1363                                  output_token,
1364                                  ret_flags,
1365                                  time_rec);
1366
1367     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
1368
1369     if (GSS_ERROR(major))
1370         gssEapReleaseContext(&tmpMinor, context_handle);
1371
1372     return major;
1373 }