www.project-moonshot.org Git - mech_eap.orig/blob - 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
  40 static OM_uint32
  41 policyVariableToFlag(enum eapol_bool_var variable)
  42 {
  43     OM_uint32 flag = 0;
  44
  45     switch (variable) {
  46     case EAPOL_eapSuccess:
  47         flag = CTX_FLAG_EAP_SUCCESS;
  48         break;
  49     case EAPOL_eapRestart:
  50         flag = CTX_FLAG_EAP_RESTART;
  51         break;
  52     case EAPOL_eapFail:
  53         flag = CTX_FLAG_EAP_FAIL;
  54         break;
  55     case EAPOL_eapResp:
  56         flag = CTX_FLAG_EAP_RESP;
  57         break;
  58     case EAPOL_eapNoResp:
  59         flag = CTX_FLAG_EAP_NO_RESP;
  60         break;
  61     case EAPOL_eapReq:
  62         flag = CTX_FLAG_EAP_REQ;
  63         break;
  64     case EAPOL_portEnabled:
  65         flag = CTX_FLAG_EAP_PORT_ENABLED;
  66         break;
  67     case EAPOL_altAccept:
  68         flag = CTX_FLAG_EAP_ALT_ACCEPT;
  69         break;
  70     case EAPOL_altReject:
  71         flag = CTX_FLAG_EAP_ALT_REJECT;
  72         break;
  73     }
  74
  75     return flag;
  76 }
  77
  78 static struct eap_peer_config *
  79 peerGetConfig(void *ctx)
  80 {
  81     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
  82
  83     return &gssCtx->initiatorCtx.eapPeerConfig;
  84 }
  85
  86 static Boolean
  87 peerGetBool(void *data, enum eapol_bool_var variable)
  88 {
  89     gss_ctx_id_t ctx = data;
  90     OM_uint32 flag;
  91
  92     if (ctx == GSS_C_NO_CONTEXT)
  93         return FALSE;
  94
  95     flag = policyVariableToFlag(variable);
  96
  97     return ((ctx->flags & flag) != 0);
  98 }
  99
 100 static void
 101 peerSetBool(void *data, enum eapol_bool_var variable,
 102             Boolean value)
 103 {
 104     gss_ctx_id_t ctx = data;
 105     OM_uint32 flag;
 106
 107     if (ctx == GSS_C_NO_CONTEXT)
 108         return;
 109
 110     flag = policyVariableToFlag(variable);
 111
 112     if (value)
 113         ctx->flags |= flag;
 114     else
 115         ctx->flags &= ~(flag);
 116 }
 117
 118 static unsigned int
 119 peerGetInt(void *data, enum eapol_int_var variable)
 120 {
 121     gss_ctx_id_t ctx = data;
 122
 123     if (ctx == GSS_C_NO_CONTEXT)
 124         return FALSE;
 125
 126     assert(CTX_IS_INITIATOR(ctx));
 127
 128     switch (variable) {
 129     case EAPOL_idleWhile:
 130         return ctx->initiatorCtx.idleWhile;
 131         break;
 132     }
 133
 134     return 0;
 135 }
 136
 137 static void
 138 peerSetInt(void *data, enum eapol_int_var variable,
 139            unsigned int value)
 140 {
 141     gss_ctx_id_t ctx = data;
 142
 143     if (ctx == GSS_C_NO_CONTEXT)
 144         return;
 145
 146     assert(CTX_IS_INITIATOR(ctx));
 147
 148     switch (variable) {
 149     case EAPOL_idleWhile:
 150         ctx->initiatorCtx.idleWhile = value;
 151         break;
 152     }
 153 }
 154
 155 static struct wpabuf *
 156 peerGetEapReqData(void *ctx)
 157 {
 158     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
 159
 160     return &gssCtx->initiatorCtx.reqData;
 161 }
 162
 163 static void
 164 peerSetConfigBlob(void *ctx GSSEAP_UNUSED,
 165                   struct wpa_config_blob *blob GSSEAP_UNUSED)
 166 {
 167 }
 168
 169 static const struct wpa_config_blob *
 170 peerGetConfigBlob(void *ctx GSSEAP_UNUSED,
 171                   const char *name GSSEAP_UNUSED)
 172 {
 173     return NULL;
 174 }
 175
 176 static void
 177 peerNotifyPending(void *ctx GSSEAP_UNUSED)
 178 {
 179 }
 180
 181 static struct eapol_callbacks gssEapPolicyCallbacks = {
 182     peerGetConfig,
 183     peerGetBool,
 184     peerSetBool,
 185     peerGetInt,
 186     peerSetInt,
 187     peerGetEapReqData,
 188     peerSetConfigBlob,
 189     peerGetConfigBlob,
 190     peerNotifyPending,
 191 };
 192
 193 #ifdef GSSEAP_DEBUG
 194 extern int wpa_debug_level;
 195 #endif
 196
 197 static OM_uint32
 198 peerConfigInit(OM_uint32 *minor,
 199                gss_cred_id_t cred,
 200                gss_ctx_id_t ctx)
 201 {
 202     OM_uint32 major;
 203     krb5_context krbContext;
 204     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 205     gss_buffer_desc identity = GSS_C_EMPTY_BUFFER;
 206     gss_buffer_desc anonymousIdentity = GSS_C_EMPTY_BUFFER;
 207     ssize_t i;
 208
 209     eapPeerConfig->identity = NULL;
 210     eapPeerConfig->identity_len = 0;
 211     eapPeerConfig->anonymous_identity = NULL;
 212     eapPeerConfig->anonymous_identity_len = 0;
 213     eapPeerConfig->password = NULL;
 214     eapPeerConfig->password_len = 0;
 215
 216     assert(cred != GSS_C_NO_CREDENTIAL);
 217
 218     GSSEAP_KRB_INIT(&krbContext);
 219
 220     eapPeerConfig->fragment_size = 1024;
 221 #ifdef GSSEAP_DEBUG
 222     wpa_debug_level = 0;
 223 #endif
 224
 225     assert(cred->name != GSS_C_NO_NAME);
 226
 227     if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
 228         *minor = GSSEAP_BAD_INITIATOR_NAME;
 229         return GSS_S_BAD_NAME;
 230     }
 231
 232     major = gssEapDisplayName(minor, cred->name, &identity, NULL);
 233     if (GSS_ERROR(major))
 234         return major;
 235
 236     assert(identity.length > 0);
 237
 238     for (i = identity.length - 1; i >= 0; i--) {
 239         unsigned char *p = (unsigned char *)identity.value + i;
 240
 241         if (*p == '@') {
 242             anonymousIdentity.length = identity.length - i;
 243             anonymousIdentity.value = p;
 244             break;
 245         }
 246     }
 247
 248     if (anonymousIdentity.length == 0)
 249         anonymousIdentity.value = "";
 250
 251     eapPeerConfig->identity = (unsigned char *)identity.value;
 252     eapPeerConfig->identity_len = identity.length;
 253     eapPeerConfig->anonymous_identity = (unsigned char *)anonymousIdentity.value;
 254     eapPeerConfig->anonymous_identity_len = anonymousIdentity.length;
 255     eapPeerConfig->password = (unsigned char *)cred->password.value;
 256     eapPeerConfig->password_len = cred->password.length;
 257
 258     *minor = 0;
 259     return GSS_S_COMPLETE;
 260 }
 261
 262 static OM_uint32
 263 peerConfigFree(OM_uint32 *minor,
 264                gss_ctx_id_t ctx)
 265 {
 266     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 267
 268     GSSEAP_FREE(eapPeerConfig->identity);
 269
 270     *minor = 0;
 271     return GSS_S_COMPLETE;
 272 }
 273
 274 /*
 275  * Mark an initiator context as ready for cryptographic operations
 276  */
 277 static OM_uint32
 278 initReady(OM_uint32 *minor, gss_ctx_id_t ctx, OM_uint32 reqFlags)
 279 {
 280     OM_uint32 major;
 281     const unsigned char *key;
 282     size_t keyLength;
 283
 284 #if 1
 285     /* XXX actually check for mutual auth */
 286     if (reqFlags & GSS_C_MUTUAL_FLAG)
 287         ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
 288 #endif
 289
 290     /* Cache encryption type derived from selected mechanism OID */
 291     major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
 292     if (GSS_ERROR(major))
 293         return major;
 294
 295     if (!eap_key_available(ctx->initiatorCtx.eap)) {
 296         *minor = GSSEAP_KEY_UNAVAILABLE;
 297         return GSS_S_UNAVAILABLE;
 298     }
 299
 300     key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
 301
 302     if (keyLength < EAP_EMSK_LEN) {
 303         *minor = GSSEAP_KEY_TOO_SHORT;
 304         return GSS_S_UNAVAILABLE;
 305     }
 306
 307     major = gssEapDeriveRfc3961Key(minor,
 308                                    &key[EAP_EMSK_LEN / 2],
 309                                    EAP_EMSK_LEN / 2,
 310                                    ctx->encryptionType,
 311                                    &ctx->rfc3961Key);
 312        if (GSS_ERROR(major))
 313            return major;
 314
 315     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 316                                       &ctx->checksumType);
 317     if (GSS_ERROR(major))
 318         return major;
 319
 320     major = sequenceInit(minor,
 321                          &ctx->seqState,
 322                          ctx->recvSeq,
 323                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 324                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 325                          TRUE);
 326     if (GSS_ERROR(major))
 327         return major;
 328
 329     *minor = 0;
 330     return GSS_S_COMPLETE;
 331 }
 332
 333 static OM_uint32
 334 initBegin(OM_uint32 *minor,
 335           gss_cred_id_t cred,
 336           gss_ctx_id_t ctx,
 337           gss_name_t target,
 338           gss_OID mech,
 339           OM_uint32 reqFlags GSSEAP_UNUSED,
 340           OM_uint32 timeReq,
 341           gss_channel_bindings_t chanBindings GSSEAP_UNUSED)
 342 {
 343     OM_uint32 major;
 344
 345     assert(cred != GSS_C_NO_CREDENTIAL);
 346
 347     if (cred->expiryTime)
 348         ctx->expiryTime = cred->expiryTime;
 349     else if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
 350         ctx->expiryTime = 0;
 351     else
 352         ctx->expiryTime = time(NULL) + timeReq;
 353
 354     /*
 355      * The credential mutex protects its name, however we need to
 356      * explicitly lock the acceptor name (unlikely as it may be
 357      * that it has attributes set on it).
 358      */
 359     major = gssEapDuplicateName(minor, cred->name, &ctx->initiatorName);
 360     if (GSS_ERROR(major))
 361         return major;
 362
 363     if (target != GSS_C_NO_NAME) {
 364         GSSEAP_MUTEX_LOCK(&target->mutex);
 365
 366         major = gssEapDuplicateName(minor, target, &ctx->acceptorName);
 367         if (GSS_ERROR(major)) {
 368             GSSEAP_MUTEX_UNLOCK(&target->mutex);
 369             return major;
 370         }
 371
 372         GSSEAP_MUTEX_UNLOCK(&target->mutex);
 373     }
 374
 375     major = gssEapCanonicalizeOid(minor,
 376                                   mech,
 377                                   OID_FLAG_NULL_VALID | OID_FLAG_MAP_NULL_TO_DEFAULT_MECH,
 378                                   &ctx->mechanismUsed);
 379     if (GSS_ERROR(major))
 380         return major;
 381
 382     /* If credentials were provided, check they're usable with this mech */
 383     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 384         *minor = GSSEAP_CRED_MECH_MISMATCH;
 385         return GSS_S_BAD_MECH;
 386     }
 387
 388     *minor = 0;
 389     return GSS_S_COMPLETE;
 390 }
 391
 392 static OM_uint32
 393 eapGssSmInitError(OM_uint32 *minor,
 394                   gss_cred_id_t cred GSSEAP_UNUSED,
 395                   gss_ctx_id_t ctx GSSEAP_UNUSED,
 396                   gss_name_t target GSSEAP_UNUSED,
 397                   gss_OID mech GSSEAP_UNUSED,
 398                   OM_uint32 reqFlags GSSEAP_UNUSED,
 399                   OM_uint32 timeReq GSSEAP_UNUSED,
 400                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 401                   gss_buffer_t inputToken,
 402                   gss_buffer_t outputToken GSSEAP_UNUSED,
 403                   OM_uint32 *smFlags GSSEAP_UNUSED)
 404 {
 405     OM_uint32 major;
 406     unsigned char *p;
 407
 408     if (inputToken->length < 8) {
 409         *minor = GSSEAP_TOK_TRUNC;
 410         return GSS_S_DEFECTIVE_TOKEN;
 411     }
 412
 413     p = (unsigned char *)inputToken->value;
 414
 415     major = load_uint32_be(&p[0]);
 416     *minor = ERROR_TABLE_BASE_eapg + load_uint32_be(&p[4]);
 417
 418     if (!GSS_ERROR(major) || !IS_WIRE_ERROR(*minor)) {
 419         major = GSS_S_FAILURE;
 420         *minor = GSSEAP_BAD_ERROR_TOKEN;
 421     }
 422
 423     assert(GSS_ERROR(major));
 424
 425     return major;
 426 }
 427
 428 #ifdef GSSEAP_ENABLE_REAUTH
 429 static OM_uint32
 430 eapGssSmInitGssReauth(OM_uint32 *minor,
 431                       gss_cred_id_t cred,
 432                       gss_ctx_id_t ctx,
 433                       gss_name_t target,
 434                       gss_OID mech GSSEAP_UNUSED,
 435                       OM_uint32 reqFlags,
 436                       OM_uint32 timeReq,
 437                       gss_channel_bindings_t chanBindings,
 438                       gss_buffer_t inputToken,
 439                       gss_buffer_t outputToken,
 440                       OM_uint32 *smFlags GSSEAP_UNUSED)
 441 {
 442     OM_uint32 major, tmpMinor;
 443     gss_name_t mechTarget = GSS_C_NO_NAME;
 444     gss_OID actualMech = GSS_C_NO_OID;
 445     OM_uint32 gssFlags, timeRec;
 446
 447     assert(cred != GSS_C_NO_CREDENTIAL);
 448
 449     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
 450         if (!gssEapCanReauthP(cred, target, timeReq))
 451             return GSS_S_CONTINUE_NEEDED;
 452
 453         ctx->flags |= CTX_FLAG_KRB_REAUTH;
 454     } else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
 455         major = GSS_S_DEFECTIVE_TOKEN;
 456         *minor = GSSEAP_WRONG_ITOK;
 457         goto cleanup;
 458     }
 459
 460     major = gssEapMechToGlueName(minor, target, &mechTarget);
 461     if (GSS_ERROR(major))
 462         goto cleanup;
 463
 464     major = gssInitSecContext(minor,
 465                               cred->krbCred,
 466                               &ctx->kerberosCtx,
 467                               mechTarget,
 468                               (gss_OID)gss_mech_krb5,
 469                               reqFlags | GSS_C_MUTUAL_FLAG,
 470                               timeReq,
 471                               chanBindings,
 472                               inputToken,
 473                               &actualMech,
 474                               outputToken,
 475                               &gssFlags,
 476                               &timeRec);
 477     if (GSS_ERROR(major))
 478         goto cleanup;
 479
 480     ctx->gssFlags = gssFlags;
 481
 482     if (major == GSS_S_COMPLETE) {
 483         assert(GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE);
 484
 485         major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
 486         if (GSS_ERROR(major))
 487             goto cleanup;
 488         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 489     } else {
 490         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
 491     }
 492
 493 cleanup:
 494     gssReleaseName(&tmpMinor, &mechTarget);
 495
 496     return major;
 497 }
 498 #endif /* GSSEAP_ENABLE_REAUTH */
 499
 500 #ifdef GSSEAP_DEBUG
 501 static OM_uint32
 502 eapGssSmInitVendorInfo(OM_uint32 *minor,
 503                        gss_cred_id_t cred GSSEAP_UNUSED,
 504                        gss_ctx_id_t ctx GSSEAP_UNUSED,
 505                        gss_name_t target GSSEAP_UNUSED,
 506                        gss_OID mech GSSEAP_UNUSED,
 507                        OM_uint32 reqFlags GSSEAP_UNUSED,
 508                        OM_uint32 timeReq GSSEAP_UNUSED,
 509                        gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 510                        gss_buffer_t inputToken GSSEAP_UNUSED,
 511                        gss_buffer_t outputToken,
 512                        OM_uint32 *smFlags GSSEAP_UNUSED)
 513 {
 514     OM_uint32 major;
 515
 516     major = makeStringBuffer(minor, "JANET(UK)", outputToken);
 517     if (GSS_ERROR(major))
 518         return major;
 519
 520     return GSS_S_CONTINUE_NEEDED;
 521 }
 522 #endif
 523
 524 static OM_uint32
 525 eapGssSmInitAcceptorName(OM_uint32 *minor,
 526                          gss_cred_id_t cred GSSEAP_UNUSED,
 527                          gss_ctx_id_t ctx,
 528                          gss_name_t target GSSEAP_UNUSED,
 529                          gss_OID mech GSSEAP_UNUSED,
 530                          OM_uint32 reqFlags GSSEAP_UNUSED,
 531                          OM_uint32 timeReq GSSEAP_UNUSED,
 532                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 533                          gss_buffer_t inputToken GSSEAP_UNUSED,
 534                          gss_buffer_t outputToken,
 535                          OM_uint32 *smFlags GSSEAP_UNUSED)
 536 {
 537     OM_uint32 major;
 538
 539     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL &&
 540         ctx->acceptorName != GSS_C_NO_NAME) {
 541
 542         /* Send desired target name to acceptor */
 543         major = gssEapDisplayName(minor, ctx->acceptorName,
 544                                   outputToken, NULL);
 545         if (GSS_ERROR(major))
 546             return major;
 547     } else if (inputToken != GSS_C_NO_BUFFER &&
 548                ctx->acceptorName == GSS_C_NO_NAME) {
 549         /* Accept target name hint from acceptor */
 550         major = gssEapImportName(minor, inputToken,
 551                                  GSS_C_NT_USER_NAME,
 552                                  ctx->mechanismUsed,
 553                                  &ctx->acceptorName);
 554         if (GSS_ERROR(major))
 555             return major;
 556     }
 557
 558     /*
 559      * Currently, other parts of the code assume that the acceptor name
 560      * is available, hence this check.
 561      */
 562     if (ctx->acceptorName == GSS_C_NO_NAME) {
 563         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 564         return GSS_S_FAILURE;
 565     }
 566
 567     return GSS_S_CONTINUE_NEEDED;
 568 }
 569
 570 static OM_uint32
 571 eapGssSmInitIdentity(OM_uint32 *minor,
 572                      gss_cred_id_t cred GSSEAP_UNUSED,
 573                      gss_ctx_id_t ctx,
 574                      gss_name_t target GSSEAP_UNUSED,
 575                      gss_OID mech GSSEAP_UNUSED,
 576                      OM_uint32 reqFlags GSSEAP_UNUSED,
 577                      OM_uint32 timeReq GSSEAP_UNUSED,
 578                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 579                      gss_buffer_t inputToken GSSEAP_UNUSED,
 580                      gss_buffer_t outputToken GSSEAP_UNUSED,
 581                      OM_uint32 *smFlags)
 582 {
 583     struct eap_config eapConfig;
 584
 585 #ifdef GSSEAP_ENABLE_REAUTH
 586     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE) {
 587         OM_uint32 tmpMinor;
 588
 589         /* server didn't support reauthentication, sent EAP request */
 590         gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
 591         ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
 592         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
 593     } else
 594 #endif
 595         *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 596
 597     assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
 598     assert(inputToken == GSS_C_NO_BUFFER);
 599
 600     memset(&eapConfig, 0, sizeof(eapConfig));
 601
 602     ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
 603                                              &gssEapPolicyCallbacks,
 604                                              ctx,
 605                                              &eapConfig);
 606     if (ctx->initiatorCtx.eap == NULL) {
 607         *minor = GSSEAP_PEER_SM_INIT_FAILURE;
 608         return GSS_S_FAILURE;
 609     }
 610
 611     ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
 612
 613     /* poke EAP state machine */
 614     if (eap_peer_sm_step(ctx->initiatorCtx.eap) != 0) {
 615         *minor = GSSEAP_PEER_SM_STEP_FAILURE;
 616         return GSS_S_FAILURE;
 617     }
 618
 619     GSSEAP_SM_TRANSITION_NEXT(ctx);
 620
 621     *minor = 0;
 622
 623     return GSS_S_CONTINUE_NEEDED;
 624 }
 625
 626 static OM_uint32
 627 eapGssSmInitAuthenticate(OM_uint32 *minor,
 628                          gss_cred_id_t cred,
 629                          gss_ctx_id_t ctx,
 630                          gss_name_t target GSSEAP_UNUSED,
 631                          gss_OID mech GSSEAP_UNUSED,
 632                          OM_uint32 reqFlags GSSEAP_UNUSED,
 633                          OM_uint32 timeReq GSSEAP_UNUSED,
 634                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 635                          gss_buffer_t inputToken GSSEAP_UNUSED,
 636                          gss_buffer_t outputToken,
 637                          OM_uint32 *smFlags)
 638 {
 639     OM_uint32 major;
 640     OM_uint32 tmpMinor;
 641     int code;
 642     struct wpabuf *resp = NULL;
 643
 644     *minor = 0;
 645
 646     assert(inputToken != GSS_C_NO_BUFFER);
 647
 648     major = peerConfigInit(minor, cred, ctx);
 649     if (GSS_ERROR(major))
 650         goto cleanup;
 651
 652     assert(ctx->initiatorCtx.eap != NULL);
 653     assert(ctx->flags & CTX_FLAG_EAP_PORT_ENABLED);
 654
 655     ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
 656
 657     wpabuf_set(&ctx->initiatorCtx.reqData,
 658                inputToken->value, inputToken->length);
 659
 660     major = GSS_S_CONTINUE_NEEDED;
 661
 662     code = eap_peer_sm_step(ctx->initiatorCtx.eap);
 663     if (ctx->flags & CTX_FLAG_EAP_RESP) {
 664         ctx->flags &= ~(CTX_FLAG_EAP_RESP);
 665
 666         resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
 667     } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
 668         major = initReady(minor, ctx, reqFlags);
 669         if (GSS_ERROR(major))
 670             goto cleanup;
 671
 672         ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
 673         major = GSS_S_CONTINUE_NEEDED;
 674         GSSEAP_SM_TRANSITION_NEXT(ctx);
 675     } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
 676         major = GSS_S_DEFECTIVE_CREDENTIAL;
 677         *minor = GSSEAP_PEER_AUTH_FAILURE;
 678     } else {
 679         major = GSS_S_DEFECTIVE_TOKEN;
 680         *minor = GSSEAP_PEER_BAD_MESSAGE;
 681     }
 682
 683 cleanup:
 684     if (resp != NULL) {
 685         OM_uint32 tmpMajor;
 686         gss_buffer_desc respBuf;
 687
 688         assert(major == GSS_S_CONTINUE_NEEDED);
 689
 690         respBuf.length = wpabuf_len(resp);
 691         respBuf.value = (void *)wpabuf_head(resp);
 692
 693         tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
 694         if (GSS_ERROR(tmpMajor)) {
 695             major = tmpMajor;
 696             *minor = tmpMinor;
 697         }
 698
 699         *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 700     }
 701
 702     wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
 703     peerConfigFree(&tmpMinor, ctx);
 704
 705     return major;
 706 }
 707
 708 static OM_uint32
 709 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
 710                                gss_cred_id_t cred GSSEAP_UNUSED,
 711                                gss_ctx_id_t ctx,
 712                                gss_name_t target GSSEAP_UNUSED,
 713                                gss_OID mech GSSEAP_UNUSED,
 714                                OM_uint32 reqFlags GSSEAP_UNUSED,
 715                                OM_uint32 timeReq GSSEAP_UNUSED,
 716                                gss_channel_bindings_t chanBindings,
 717                                gss_buffer_t inputToken GSSEAP_UNUSED,
 718                                gss_buffer_t outputToken,
 719                                OM_uint32 *smFlags)
 720 {
 721     OM_uint32 major;
 722     gss_buffer_desc buffer = GSS_C_EMPTY_BUFFER;
 723
 724     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
 725         buffer = chanBindings->application_data;
 726
 727     major = gssEapWrap(minor, ctx, TRUE, GSS_C_QOP_DEFAULT,
 728                        &buffer, NULL, outputToken);
 729     if (GSS_ERROR(major))
 730         return major;
 731
 732     assert(outputToken->value != NULL);
 733
 734     *minor = 0;
 735     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 736
 737     return GSS_S_CONTINUE_NEEDED;
 738 }
 739
 740 #ifdef GSSEAP_ENABLE_REAUTH
 741 static OM_uint32
 742 eapGssSmInitReauthCreds(OM_uint32 *minor,
 743                         gss_cred_id_t cred,
 744                         gss_ctx_id_t ctx,
 745                         gss_name_t target GSSEAP_UNUSED,
 746                         gss_OID mech GSSEAP_UNUSED,
 747                         OM_uint32 reqFlags GSSEAP_UNUSED,
 748                         OM_uint32 timeReq GSSEAP_UNUSED,
 749                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 750                         gss_buffer_t inputToken,
 751                         gss_buffer_t outputToken GSSEAP_UNUSED,
 752                         OM_uint32 *smFlags GSSEAP_UNUSED)
 753 {
 754     OM_uint32 major;
 755
 756     if (ctx->gssFlags & GSS_C_MUTUAL_FLAG) {
 757         major = gssEapStoreReauthCreds(minor, ctx, cred, inputToken);
 758         if (GSS_ERROR(major))
 759             return major;
 760     }
 761
 762     *minor = 0;
 763     return GSS_S_CONTINUE_NEEDED;
 764 }
 765 #endif /* GSSEAP_ENABLE_REAUTH */
 766
 767 static OM_uint32
 768 eapGssSmInitCompleteInitiatorExts(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     GSSEAP_SM_TRANSITION_NEXT(ctx);
 781
 782     *minor = 0;
 783     *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 784
 785     return GSS_S_CONTINUE_NEEDED;
 786 }
 787
 788 static OM_uint32
 789 eapGssSmInitCompleteAcceptorExts(OM_uint32 *minor,
 790                                  gss_cred_id_t cred GSSEAP_UNUSED,
 791                                  gss_ctx_id_t ctx,
 792                                  gss_name_t target GSSEAP_UNUSED,
 793                                  gss_OID mech GSSEAP_UNUSED,
 794                                  OM_uint32 reqFlags GSSEAP_UNUSED,
 795                                  OM_uint32 timeReq GSSEAP_UNUSED,
 796                                  gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 797                                  gss_buffer_t inputToken GSSEAP_UNUSED,
 798                                  gss_buffer_t outputToken GSSEAP_UNUSED,
 799                                  OM_uint32 *smFlags GSSEAP_UNUSED)
 800 {
 801     GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 802
 803     *minor = 0;
 804
 805     return GSS_S_COMPLETE;
 806 }
 807
 808 static struct gss_eap_sm eapGssInitiatorSm[] = {
 809     {
 810         ITOK_TYPE_CONTEXT_ERR,
 811         ITOK_TYPE_NONE,
 812         GSSEAP_STATE_ALL & ~(GSSEAP_STATE_INITIAL),
 813         0,
 814         eapGssSmInitError
 815     },
 816     {
 817         ITOK_TYPE_ACCEPTOR_NAME_RESP,
 818         ITOK_TYPE_ACCEPTOR_NAME_REQ,
 819         GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE,
 820         0,
 821         eapGssSmInitAcceptorName
 822     },
 823 #ifdef GSSEAP_DEBUG
 824     {
 825         ITOK_TYPE_NONE,
 826         ITOK_TYPE_VENDOR_INFO,
 827         GSSEAP_STATE_INITIAL,
 828         0,
 829         eapGssSmInitVendorInfo
 830     },
 831 #endif
 832 #ifdef GSSEAP_ENABLE_REAUTH
 833     {
 834         ITOK_TYPE_REAUTH_RESP,
 835         ITOK_TYPE_REAUTH_REQ,
 836         GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
 837         0,
 838         eapGssSmInitGssReauth
 839     },
 840 #endif
 841     {
 842         ITOK_TYPE_NONE,
 843         ITOK_TYPE_NONE,
 844 #ifdef GSSEAP_ENABLE_REAUTH
 845         GSSEAP_STATE_REAUTHENTICATE |
 846 #endif
 847         GSSEAP_STATE_INITIAL,
 848         SM_ITOK_FLAG_REQUIRED,
 849         eapGssSmInitIdentity
 850     },
 851     {
 852         ITOK_TYPE_EAP_REQ,
 853         ITOK_TYPE_EAP_RESP,
 854         GSSEAP_STATE_AUTHENTICATE,
 855         SM_ITOK_FLAG_REQUIRED,
 856         eapGssSmInitAuthenticate
 857     },
 858     {
 859         ITOK_TYPE_NONE,
 860         ITOK_TYPE_GSS_CHANNEL_BINDINGS,
 861         GSSEAP_STATE_INITIATOR_EXTS,
 862         SM_ITOK_FLAG_REQUIRED,
 863         eapGssSmInitGssChannelBindings
 864     },
 865     {
 866         ITOK_TYPE_NONE,
 867         ITOK_TYPE_NONE,
 868         GSSEAP_STATE_INITIATOR_EXTS,
 869         0,
 870         eapGssSmInitCompleteInitiatorExts
 871     },
 872 #ifdef GSSEAP_ENABLE_REAUTH
 873     {
 874         ITOK_TYPE_REAUTH_CREDS,
 875         ITOK_TYPE_NONE,
 876         GSSEAP_STATE_ACCEPTOR_EXTS,
 877         0,
 878         eapGssSmInitReauthCreds
 879     },
 880 #endif
 881     /* other extensions go here */
 882     {
 883         ITOK_TYPE_NONE,
 884         ITOK_TYPE_NONE,
 885         GSSEAP_STATE_ACCEPTOR_EXTS,
 886         0,
 887         eapGssSmInitCompleteAcceptorExts
 888     }
 889 };
 890
 891 OM_uint32
 892 gss_init_sec_context(OM_uint32 *minor,
 893                      gss_cred_id_t cred,
 894                      gss_ctx_id_t *context_handle,
 895                      gss_name_t target_name,
 896                      gss_OID mech_type,
 897                      OM_uint32 req_flags,
 898                      OM_uint32 time_req,
 899                      gss_channel_bindings_t input_chan_bindings,
 900                      gss_buffer_t input_token,
 901                      gss_OID *actual_mech_type,
 902                      gss_buffer_t output_token,
 903                      OM_uint32 *ret_flags,
 904                      OM_uint32 *time_rec)
 905 {
 906     OM_uint32 major, tmpMinor;
 907     gss_ctx_id_t ctx = *context_handle;
 908     int initialContextToken = 0;
 909
 910     *minor = 0;
 911
 912     output_token->length = 0;
 913     output_token->value = NULL;
 914
 915     if (ctx == GSS_C_NO_CONTEXT) {
 916         if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
 917             *minor = GSSEAP_WRONG_SIZE;
 918             return GSS_S_DEFECTIVE_TOKEN;
 919         }
 920
 921         major = gssEapAllocContext(minor, &ctx);
 922         if (GSS_ERROR(major))
 923             return major;
 924
 925         ctx->flags |= CTX_FLAG_INITIATOR;
 926         initialContextToken = 1;
 927
 928         *context_handle = ctx;
 929     }
 930
 931     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 932
 933     if (cred == GSS_C_NO_CREDENTIAL) {
 934         if (ctx->defaultCred == GSS_C_NO_CREDENTIAL) {
 935             major = gssEapAcquireCred(minor,
 936                                       GSS_C_NO_NAME,
 937                                       GSS_C_NO_BUFFER,
 938                                       time_req,
 939                                       GSS_C_NO_OID_SET,
 940                                       GSS_C_INITIATE,
 941                                       &ctx->defaultCred,
 942                                       NULL,
 943                                       NULL);
 944             if (GSS_ERROR(major))
 945                 goto cleanup;
 946         }
 947
 948         cred = ctx->defaultCred;
 949     }
 950
 951     GSSEAP_MUTEX_LOCK(&cred->mutex);
 952
 953     if ((cred->flags & CRED_FLAG_INITIATE) == 0) {
 954         major = GSS_S_NO_CRED;
 955         *minor = GSSEAP_CRED_USAGE_MISMATCH;
 956         goto cleanup;
 957     }
 958
 959     if (initialContextToken) {
 960         major = initBegin(minor, cred, ctx, target_name, mech_type,
 961                           req_flags, time_req, input_chan_bindings);
 962         if (GSS_ERROR(major))
 963             goto cleanup;
 964     }
 965
 966     major = gssEapSmStep(minor,
 967                          cred,
 968                          ctx,
 969                          target_name,
 970                          mech_type,
 971                          req_flags,
 972                          time_req,
 973                          input_chan_bindings,
 974                          input_token,
 975                          output_token,
 976                          eapGssInitiatorSm,
 977                          sizeof(eapGssInitiatorSm) / sizeof(eapGssInitiatorSm[0]));
 978     if (GSS_ERROR(major))
 979         goto cleanup;
 980
 981     if (actual_mech_type != NULL) {
 982         OM_uint32 tmpMajor;
 983
 984         tmpMajor = gssEapCanonicalizeOid(&tmpMinor, ctx->mechanismUsed, 0, actual_mech_type);
 985         if (GSS_ERROR(tmpMajor)) {
 986             major = tmpMajor;
 987             *minor = tmpMinor;
 988             goto cleanup;
 989         }
 990     }
 991     if (ret_flags != NULL)
 992         *ret_flags = ctx->gssFlags;
 993     if (time_rec != NULL)
 994         gssEapContextTime(&tmpMinor, ctx, time_rec);
 995
 996     assert(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
 997
 998 cleanup:
 999     if (cred != GSS_C_NO_CREDENTIAL)
1000         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
1001     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
1002
1003     if (GSS_ERROR(major))
1004         gssEapReleaseContext(&tmpMinor, context_handle);
1005
1006     return major;
1007 }