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     krb5_context krbContext;
 203     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 204     krb5_error_code code;
 205     char *identity, *anonymousIdentity;
 206
 207     eapPeerConfig->identity = NULL;
 208     eapPeerConfig->identity_len = 0;
 209     eapPeerConfig->password = NULL;
 210     eapPeerConfig->password_len = 0;
 211
 212     assert(cred != GSS_C_NO_CREDENTIAL);
 213
 214     GSSEAP_KRB_INIT(&krbContext);
 215
 216     eapPeerConfig->fragment_size = 1024;
 217 #ifdef GSSEAP_DEBUG
 218     wpa_debug_level = 0;
 219 #endif
 220
 221     assert(cred->name != GSS_C_NO_NAME);
 222
 223     if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
 224         *minor = GSSEAP_BAD_INITIATOR_NAME;
 225         return GSS_S_BAD_NAME;
 226     }
 227
 228     code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
 229     if (code != 0) {
 230         *minor = code;
 231         return GSS_S_FAILURE;
 232     }
 233
 234     anonymousIdentity = strchr(identity, '@');
 235     if (anonymousIdentity == NULL)
 236         anonymousIdentity = "";
 237
 238     eapPeerConfig->identity = (unsigned char *)identity;
 239     eapPeerConfig->identity_len = strlen(identity);
 240     eapPeerConfig->anonymous_identity = (unsigned char *)anonymousIdentity;
 241     eapPeerConfig->anonymous_identity_len = strlen(anonymousIdentity);
 242     eapPeerConfig->password = (unsigned char *)cred->password.value;
 243     eapPeerConfig->password_len = cred->password.length;
 244
 245     *minor = 0;
 246     return GSS_S_COMPLETE;
 247 }
 248
 249 static OM_uint32
 250 peerConfigFree(OM_uint32 *minor,
 251                gss_ctx_id_t ctx)
 252 {
 253     krb5_context krbContext;
 254     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 255
 256     GSSEAP_KRB_INIT(&krbContext);
 257
 258     krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
 259
 260     *minor = 0;
 261     return GSS_S_COMPLETE;
 262 }
 263
 264 /*
 265  * Mark an initiator context as ready for cryptographic operations
 266  */
 267 static OM_uint32
 268 initReady(OM_uint32 *minor, gss_ctx_id_t ctx, OM_uint32 reqFlags)
 269 {
 270     OM_uint32 major;
 271     const unsigned char *key;
 272     size_t keyLength;
 273
 274 #if 1
 275     /* XXX actually check for mutual auth */
 276     if (reqFlags & GSS_C_MUTUAL_FLAG)
 277         ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
 278 #endif
 279
 280     /* Cache encryption type derived from selected mechanism OID */
 281     major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
 282     if (GSS_ERROR(major))
 283         return major;
 284
 285     if (!eap_key_available(ctx->initiatorCtx.eap)) {
 286         *minor = GSSEAP_KEY_UNAVAILABLE;
 287         return GSS_S_UNAVAILABLE;
 288     }
 289
 290     key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
 291
 292     if (keyLength < EAP_EMSK_LEN) {
 293         *minor = GSSEAP_KEY_TOO_SHORT;
 294         return GSS_S_UNAVAILABLE;
 295     }
 296
 297     major = gssEapDeriveRfc3961Key(minor,
 298                                    &key[EAP_EMSK_LEN / 2],
 299                                    EAP_EMSK_LEN / 2,
 300                                    ctx->encryptionType,
 301                                    &ctx->rfc3961Key);
 302        if (GSS_ERROR(major))
 303            return major;
 304
 305     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 306                                       &ctx->checksumType);
 307     if (GSS_ERROR(major))
 308         return major;
 309
 310     major = sequenceInit(minor,
 311                          &ctx->seqState,
 312                          ctx->recvSeq,
 313                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 314                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 315                          TRUE);
 316     if (GSS_ERROR(major))
 317         return major;
 318
 319     *minor = 0;
 320     return GSS_S_COMPLETE;
 321 }
 322
 323 static OM_uint32
 324 initBegin(OM_uint32 *minor,
 325           gss_cred_id_t cred,
 326           gss_ctx_id_t ctx,
 327           gss_name_t target,
 328           gss_OID mech,
 329           OM_uint32 reqFlags GSSEAP_UNUSED,
 330           OM_uint32 timeReq,
 331           gss_channel_bindings_t chanBindings GSSEAP_UNUSED)
 332 {
 333     OM_uint32 major;
 334
 335     assert(cred != GSS_C_NO_CREDENTIAL);
 336
 337     if (cred->expiryTime)
 338         ctx->expiryTime = cred->expiryTime;
 339     else if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
 340         ctx->expiryTime = 0;
 341     else
 342         ctx->expiryTime = time(NULL) + timeReq;
 343
 344     /*
 345      * The credential mutex protects its name, however we need to
 346      * explicitly lock the acceptor name (unlikely as it may be
 347      * that it has attributes set on it).
 348      */
 349     major = gssEapDuplicateName(minor, cred->name, &ctx->initiatorName);
 350     if (GSS_ERROR(major))
 351         return major;
 352
 353     if (target != GSS_C_NO_NAME) {
 354         GSSEAP_MUTEX_LOCK(&target->mutex);
 355
 356         major = gssEapDuplicateName(minor, target, &ctx->acceptorName);
 357         if (GSS_ERROR(major)) {
 358             GSSEAP_MUTEX_UNLOCK(&target->mutex);
 359             return major;
 360         }
 361
 362         GSSEAP_MUTEX_UNLOCK(&target->mutex);
 363     }
 364
 365     if (mech == GSS_C_NULL_OID) {
 366         major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
 367     } else if (gssEapIsConcreteMechanismOid(mech)) {
 368         if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
 369             major = duplicateOid(minor, mech, &ctx->mechanismUsed);
 370     } else {
 371         major = GSS_S_BAD_MECH;
 372         *minor = GSSEAP_WRONG_MECH;
 373     }
 374     if (GSS_ERROR(major))
 375         return major;
 376
 377     /* If credentials were provided, check they're usable with this mech */
 378     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 379         *minor = GSSEAP_CRED_MECH_MISMATCH;
 380         return GSS_S_BAD_MECH;
 381     }
 382
 383     *minor = 0;
 384     return GSS_S_COMPLETE;
 385 }
 386
 387 static OM_uint32
 388 eapGssSmInitError(OM_uint32 *minor,
 389                   gss_cred_id_t cred GSSEAP_UNUSED,
 390                   gss_ctx_id_t ctx GSSEAP_UNUSED,
 391                   gss_name_t target GSSEAP_UNUSED,
 392                   gss_OID mech GSSEAP_UNUSED,
 393                   OM_uint32 reqFlags GSSEAP_UNUSED,
 394                   OM_uint32 timeReq GSSEAP_UNUSED,
 395                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 396                   gss_buffer_t inputToken,
 397                   gss_buffer_t outputToken GSSEAP_UNUSED,
 398                   OM_uint32 *smFlags GSSEAP_UNUSED)
 399 {
 400     OM_uint32 major;
 401     unsigned char *p;
 402
 403     if (inputToken->length < 8) {
 404         *minor = GSSEAP_TOK_TRUNC;
 405         return GSS_S_DEFECTIVE_TOKEN;
 406     }
 407
 408     p = (unsigned char *)inputToken->value;
 409
 410     major = load_uint32_be(&p[0]);
 411     *minor = ERROR_TABLE_BASE_eapg + load_uint32_be(&p[4]);
 412
 413     if (!GSS_ERROR(major) || !IS_WIRE_ERROR(*minor)) {
 414         major = GSS_S_FAILURE;
 415         *minor = GSSEAP_BAD_ERROR_TOKEN;
 416     }
 417
 418     assert(GSS_ERROR(major));
 419
 420     return major;
 421 }
 422
 423 #ifdef GSSEAP_ENABLE_REAUTH
 424 static OM_uint32
 425 eapGssSmInitGssReauth(OM_uint32 *minor,
 426                       gss_cred_id_t cred,
 427                       gss_ctx_id_t ctx,
 428                       gss_name_t target,
 429                       gss_OID mech GSSEAP_UNUSED,
 430                       OM_uint32 reqFlags,
 431                       OM_uint32 timeReq,
 432                       gss_channel_bindings_t chanBindings,
 433                       gss_buffer_t inputToken,
 434                       gss_buffer_t outputToken,
 435                       OM_uint32 *smFlags GSSEAP_UNUSED)
 436 {
 437     OM_uint32 major, tmpMinor;
 438     gss_name_t mechTarget = GSS_C_NO_NAME;
 439     gss_OID actualMech = GSS_C_NO_OID;
 440     OM_uint32 gssFlags, timeRec;
 441
 442     assert(cred != GSS_C_NO_CREDENTIAL);
 443
 444     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
 445         if (!gssEapCanReauthP(cred, target, timeReq))
 446             return GSS_S_CONTINUE_NEEDED;
 447
 448         ctx->flags |= CTX_FLAG_KRB_REAUTH;
 449     } else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
 450         major = GSS_S_DEFECTIVE_TOKEN;
 451         *minor = GSSEAP_WRONG_ITOK;
 452         goto cleanup;
 453     }
 454
 455     major = gssEapMechToGlueName(minor, target, &mechTarget);
 456     if (GSS_ERROR(major))
 457         goto cleanup;
 458
 459     major = gssInitSecContext(minor,
 460                               cred->krbCred,
 461                               &ctx->kerberosCtx,
 462                               mechTarget,
 463                               (gss_OID)gss_mech_krb5,
 464                               reqFlags | GSS_C_MUTUAL_FLAG,
 465                               timeReq,
 466                               chanBindings,
 467                               inputToken,
 468                               &actualMech,
 469                               outputToken,
 470                               &gssFlags,
 471                               &timeRec);
 472     if (GSS_ERROR(major))
 473         goto cleanup;
 474
 475     ctx->gssFlags = gssFlags;
 476
 477     if (major == GSS_S_COMPLETE) {
 478         assert(GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE);
 479
 480         major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
 481         if (GSS_ERROR(major))
 482             goto cleanup;
 483         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 484     } else {
 485         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
 486     }
 487
 488 cleanup:
 489     gssReleaseName(&tmpMinor, &mechTarget);
 490
 491     return major;
 492 }
 493 #endif /* GSSEAP_ENABLE_REAUTH */
 494
 495 #ifdef GSSEAP_DEBUG
 496 static OM_uint32
 497 eapGssSmInitVendorInfo(OM_uint32 *minor,
 498                        gss_cred_id_t cred GSSEAP_UNUSED,
 499                        gss_ctx_id_t ctx GSSEAP_UNUSED,
 500                        gss_name_t target GSSEAP_UNUSED,
 501                        gss_OID mech GSSEAP_UNUSED,
 502                        OM_uint32 reqFlags GSSEAP_UNUSED,
 503                        OM_uint32 timeReq GSSEAP_UNUSED,
 504                        gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 505                        gss_buffer_t inputToken GSSEAP_UNUSED,
 506                        gss_buffer_t outputToken,
 507                        OM_uint32 *smFlags GSSEAP_UNUSED)
 508 {
 509     OM_uint32 major;
 510
 511     major = makeStringBuffer(minor, "JANET(UK)", outputToken);
 512     if (GSS_ERROR(major))
 513         return major;
 514
 515     return GSS_S_CONTINUE_NEEDED;
 516 }
 517 #endif
 518
 519 static OM_uint32
 520 eapGssSmInitAcceptorName(OM_uint32 *minor,
 521                          gss_cred_id_t cred GSSEAP_UNUSED,
 522                          gss_ctx_id_t ctx,
 523                          gss_name_t target GSSEAP_UNUSED,
 524                          gss_OID mech GSSEAP_UNUSED,
 525                          OM_uint32 reqFlags GSSEAP_UNUSED,
 526                          OM_uint32 timeReq GSSEAP_UNUSED,
 527                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 528                          gss_buffer_t inputToken GSSEAP_UNUSED,
 529                          gss_buffer_t outputToken,
 530                          OM_uint32 *smFlags GSSEAP_UNUSED)
 531 {
 532     OM_uint32 major;
 533
 534     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL &&
 535         ctx->acceptorName != GSS_C_NO_NAME) {
 536
 537         /* Send desired target name to acceptor */
 538         major = gssEapDisplayName(minor, ctx->acceptorName,
 539                                   outputToken, NULL);
 540         if (GSS_ERROR(major))
 541             return major;
 542     } else if (inputToken != GSS_C_NO_BUFFER &&
 543                ctx->acceptorName == GSS_C_NO_NAME) {
 544         /* Accept target name hint from acceptor */
 545         major = gssEapImportName(minor, inputToken,
 546                                  GSS_C_NT_USER_NAME,
 547                                  ctx->mechanismUsed,
 548                                  &ctx->acceptorName);
 549         if (GSS_ERROR(major))
 550             return major;
 551     }
 552
 553     /*
 554      * Currently, other parts of the code assume that the acceptor name
 555      * is available, hence this check.
 556      */
 557     if (ctx->acceptorName == GSS_C_NO_NAME) {
 558         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 559         return GSS_S_FAILURE;
 560     }
 561
 562     return GSS_S_CONTINUE_NEEDED;
 563 }
 564
 565 static OM_uint32
 566 eapGssSmInitIdentity(OM_uint32 *minor,
 567                      gss_cred_id_t cred GSSEAP_UNUSED,
 568                      gss_ctx_id_t ctx,
 569                      gss_name_t target GSSEAP_UNUSED,
 570                      gss_OID mech GSSEAP_UNUSED,
 571                      OM_uint32 reqFlags GSSEAP_UNUSED,
 572                      OM_uint32 timeReq GSSEAP_UNUSED,
 573                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 574                      gss_buffer_t inputToken GSSEAP_UNUSED,
 575                      gss_buffer_t outputToken GSSEAP_UNUSED,
 576                      OM_uint32 *smFlags)
 577 {
 578     struct eap_config eapConfig;
 579
 580 #ifdef GSSEAP_ENABLE_REAUTH
 581     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE) {
 582         OM_uint32 tmpMinor;
 583
 584         /* server didn't support reauthentication, sent EAP request */
 585         gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
 586         ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
 587         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
 588     } else
 589 #endif
 590         *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 591
 592     assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
 593     assert(inputToken == GSS_C_NO_BUFFER);
 594
 595     memset(&eapConfig, 0, sizeof(eapConfig));
 596
 597     ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
 598                                              &gssEapPolicyCallbacks,
 599                                              ctx,
 600                                              &eapConfig);
 601     if (ctx->initiatorCtx.eap == NULL) {
 602         *minor = GSSEAP_PEER_SM_INIT_FAILURE;
 603         return GSS_S_FAILURE;
 604     }
 605
 606     ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
 607
 608     /* poke EAP state machine */
 609     if (eap_peer_sm_step(ctx->initiatorCtx.eap) != 0) {
 610         *minor = GSSEAP_PEER_SM_STEP_FAILURE;
 611         return GSS_S_FAILURE;
 612     }
 613
 614     GSSEAP_SM_TRANSITION_NEXT(ctx);
 615
 616     *minor = 0;
 617
 618     return GSS_S_CONTINUE_NEEDED;
 619 }
 620
 621 static OM_uint32
 622 eapGssSmInitAuthenticate(OM_uint32 *minor,
 623                          gss_cred_id_t cred,
 624                          gss_ctx_id_t ctx,
 625                          gss_name_t target GSSEAP_UNUSED,
 626                          gss_OID mech GSSEAP_UNUSED,
 627                          OM_uint32 reqFlags GSSEAP_UNUSED,
 628                          OM_uint32 timeReq GSSEAP_UNUSED,
 629                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 630                          gss_buffer_t inputToken GSSEAP_UNUSED,
 631                          gss_buffer_t outputToken,
 632                          OM_uint32 *smFlags)
 633 {
 634     OM_uint32 major;
 635     OM_uint32 tmpMinor;
 636     int code;
 637     struct wpabuf *resp = NULL;
 638
 639     *minor = 0;
 640
 641     assert(inputToken != GSS_C_NO_BUFFER);
 642
 643     major = peerConfigInit(minor, cred, ctx);
 644     if (GSS_ERROR(major))
 645         goto cleanup;
 646
 647     assert(ctx->initiatorCtx.eap != NULL);
 648     assert(ctx->flags & CTX_FLAG_EAP_PORT_ENABLED);
 649
 650     ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
 651
 652     wpabuf_set(&ctx->initiatorCtx.reqData,
 653                inputToken->value, inputToken->length);
 654
 655     major = GSS_S_CONTINUE_NEEDED;
 656
 657     code = eap_peer_sm_step(ctx->initiatorCtx.eap);
 658     if (ctx->flags & CTX_FLAG_EAP_RESP) {
 659         ctx->flags &= ~(CTX_FLAG_EAP_RESP);
 660
 661         resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
 662     } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
 663         major = initReady(minor, ctx, reqFlags);
 664         if (GSS_ERROR(major))
 665             goto cleanup;
 666
 667         ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
 668         major = GSS_S_CONTINUE_NEEDED;
 669         GSSEAP_SM_TRANSITION_NEXT(ctx);
 670     } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
 671         major = GSS_S_DEFECTIVE_CREDENTIAL;
 672         *minor = GSSEAP_PEER_AUTH_FAILURE;
 673     } else {
 674         major = GSS_S_DEFECTIVE_TOKEN;
 675         *minor = GSSEAP_PEER_BAD_MESSAGE;
 676     }
 677
 678 cleanup:
 679     if (resp != NULL) {
 680         OM_uint32 tmpMajor;
 681         gss_buffer_desc respBuf;
 682
 683         assert(major == GSS_S_CONTINUE_NEEDED);
 684
 685         respBuf.length = wpabuf_len(resp);
 686         respBuf.value = (void *)wpabuf_head(resp);
 687
 688         tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
 689         if (GSS_ERROR(tmpMajor)) {
 690             major = tmpMajor;
 691             *minor = tmpMinor;
 692         }
 693
 694         *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 695     }
 696
 697     wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
 698     peerConfigFree(&tmpMinor, ctx);
 699
 700     return major;
 701 }
 702
 703 static OM_uint32
 704 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
 705                                gss_cred_id_t cred GSSEAP_UNUSED,
 706                                gss_ctx_id_t ctx,
 707                                gss_name_t target GSSEAP_UNUSED,
 708                                gss_OID mech GSSEAP_UNUSED,
 709                                OM_uint32 reqFlags GSSEAP_UNUSED,
 710                                OM_uint32 timeReq GSSEAP_UNUSED,
 711                                gss_channel_bindings_t chanBindings,
 712                                gss_buffer_t inputToken GSSEAP_UNUSED,
 713                                gss_buffer_t outputToken,
 714                                OM_uint32 *smFlags)
 715 {
 716     OM_uint32 major;
 717     gss_buffer_desc buffer = GSS_C_EMPTY_BUFFER;
 718
 719     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
 720         buffer = chanBindings->application_data;
 721
 722     major = gssEapWrap(minor, ctx, TRUE, GSS_C_QOP_DEFAULT,
 723                        &buffer, NULL, outputToken);
 724     if (GSS_ERROR(major))
 725         return major;
 726
 727     assert(outputToken->value != NULL);
 728
 729     *minor = 0;
 730     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 731
 732     return GSS_S_CONTINUE_NEEDED;
 733 }
 734
 735 #ifdef GSSEAP_ENABLE_REAUTH
 736 static OM_uint32
 737 eapGssSmInitReauthCreds(OM_uint32 *minor,
 738                         gss_cred_id_t cred,
 739                         gss_ctx_id_t ctx,
 740                         gss_name_t target GSSEAP_UNUSED,
 741                         gss_OID mech GSSEAP_UNUSED,
 742                         OM_uint32 reqFlags GSSEAP_UNUSED,
 743                         OM_uint32 timeReq GSSEAP_UNUSED,
 744                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 745                         gss_buffer_t inputToken,
 746                         gss_buffer_t outputToken GSSEAP_UNUSED,
 747                         OM_uint32 *smFlags GSSEAP_UNUSED)
 748 {
 749     OM_uint32 major;
 750
 751     if (ctx->gssFlags & GSS_C_MUTUAL_FLAG) {
 752         major = gssEapStoreReauthCreds(minor, ctx, cred, inputToken);
 753         if (GSS_ERROR(major))
 754             return major;
 755     }
 756
 757     *minor = 0;
 758     return GSS_S_CONTINUE_NEEDED;
 759 }
 760 #endif /* GSSEAP_ENABLE_REAUTH */
 761
 762 static OM_uint32
 763 eapGssSmInitCompleteInitiatorExts(OM_uint32 *minor,
 764                                   gss_cred_id_t cred GSSEAP_UNUSED,
 765                                   gss_ctx_id_t ctx,
 766                                   gss_name_t target GSSEAP_UNUSED,
 767                                   gss_OID mech GSSEAP_UNUSED,
 768                                   OM_uint32 reqFlags GSSEAP_UNUSED,
 769                                   OM_uint32 timeReq GSSEAP_UNUSED,
 770                                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 771                                   gss_buffer_t inputToken GSSEAP_UNUSED,
 772                                   gss_buffer_t outputToken GSSEAP_UNUSED,
 773                                   OM_uint32 *smFlags)
 774 {
 775     GSSEAP_SM_TRANSITION_NEXT(ctx);
 776
 777     *minor = 0;
 778     *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 779
 780     return GSS_S_CONTINUE_NEEDED;
 781 }
 782
 783 static OM_uint32
 784 eapGssSmInitCompleteAcceptorExts(OM_uint32 *minor,
 785                                  gss_cred_id_t cred GSSEAP_UNUSED,
 786                                  gss_ctx_id_t ctx,
 787                                  gss_name_t target GSSEAP_UNUSED,
 788                                  gss_OID mech GSSEAP_UNUSED,
 789                                  OM_uint32 reqFlags GSSEAP_UNUSED,
 790                                  OM_uint32 timeReq GSSEAP_UNUSED,
 791                                  gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 792                                  gss_buffer_t inputToken GSSEAP_UNUSED,
 793                                  gss_buffer_t outputToken GSSEAP_UNUSED,
 794                                  OM_uint32 *smFlags GSSEAP_UNUSED)
 795 {
 796     GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 797
 798     *minor = 0;
 799
 800     return GSS_S_COMPLETE;
 801 }
 802
 803 static struct gss_eap_sm eapGssInitiatorSm[] = {
 804     {
 805         ITOK_TYPE_CONTEXT_ERR,
 806         ITOK_TYPE_NONE,
 807         GSSEAP_STATE_ALL & ~(GSSEAP_STATE_INITIAL),
 808         0,
 809         eapGssSmInitError
 810     },
 811     {
 812         ITOK_TYPE_ACCEPTOR_NAME_RESP,
 813         ITOK_TYPE_ACCEPTOR_NAME_REQ,
 814         GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE,
 815         0,
 816         eapGssSmInitAcceptorName
 817     },
 818 #ifdef GSSEAP_DEBUG
 819     {
 820         ITOK_TYPE_NONE,
 821         ITOK_TYPE_VENDOR_INFO,
 822         GSSEAP_STATE_INITIAL,
 823         0,
 824         eapGssSmInitVendorInfo
 825     },
 826 #endif
 827 #ifdef GSSEAP_ENABLE_REAUTH
 828     {
 829         ITOK_TYPE_REAUTH_RESP,
 830         ITOK_TYPE_REAUTH_REQ,
 831         GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
 832         0,
 833         eapGssSmInitGssReauth
 834     },
 835 #endif
 836     {
 837         ITOK_TYPE_NONE,
 838         ITOK_TYPE_NONE,
 839 #ifdef GSSEAP_ENABLE_REAUTH
 840         GSSEAP_STATE_REAUTHENTICATE |
 841 #endif
 842         GSSEAP_STATE_INITIAL,
 843         SM_ITOK_FLAG_REQUIRED,
 844         eapGssSmInitIdentity
 845     },
 846     {
 847         ITOK_TYPE_EAP_REQ,
 848         ITOK_TYPE_EAP_RESP,
 849         GSSEAP_STATE_AUTHENTICATE,
 850         SM_ITOK_FLAG_REQUIRED,
 851         eapGssSmInitAuthenticate
 852     },
 853     {
 854         ITOK_TYPE_NONE,
 855         ITOK_TYPE_GSS_CHANNEL_BINDINGS,
 856         GSSEAP_STATE_INITIATOR_EXTS,
 857         SM_ITOK_FLAG_REQUIRED,
 858         eapGssSmInitGssChannelBindings
 859     },
 860     {
 861         ITOK_TYPE_NONE,
 862         ITOK_TYPE_NONE,
 863         GSSEAP_STATE_INITIATOR_EXTS,
 864         0,
 865         eapGssSmInitCompleteInitiatorExts
 866     },
 867 #ifdef GSSEAP_ENABLE_REAUTH
 868     {
 869         ITOK_TYPE_REAUTH_CREDS,
 870         ITOK_TYPE_NONE,
 871         GSSEAP_STATE_ACCEPTOR_EXTS,
 872         0,
 873         eapGssSmInitReauthCreds
 874     },
 875 #endif
 876     /* other extensions go here */
 877     {
 878         ITOK_TYPE_NONE,
 879         ITOK_TYPE_NONE,
 880         GSSEAP_STATE_ACCEPTOR_EXTS,
 881         0,
 882         eapGssSmInitCompleteAcceptorExts
 883     }
 884 };
 885
 886 OM_uint32
 887 gss_init_sec_context(OM_uint32 *minor,
 888                      gss_cred_id_t cred,
 889                      gss_ctx_id_t *context_handle,
 890                      gss_name_t target_name,
 891                      gss_OID mech_type,
 892                      OM_uint32 req_flags,
 893                      OM_uint32 time_req,
 894                      gss_channel_bindings_t input_chan_bindings,
 895                      gss_buffer_t input_token,
 896                      gss_OID *actual_mech_type,
 897                      gss_buffer_t output_token,
 898                      OM_uint32 *ret_flags,
 899                      OM_uint32 *time_rec)
 900 {
 901     OM_uint32 major, tmpMinor;
 902     gss_ctx_id_t ctx = *context_handle;
 903     int initialContextToken = 0;
 904
 905     *minor = 0;
 906
 907     output_token->length = 0;
 908     output_token->value = NULL;
 909
 910     if (ctx == GSS_C_NO_CONTEXT) {
 911         if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
 912             *minor = GSSEAP_WRONG_SIZE;
 913             return GSS_S_DEFECTIVE_TOKEN;
 914         }
 915
 916         major = gssEapAllocContext(minor, &ctx);
 917         if (GSS_ERROR(major))
 918             return major;
 919
 920         ctx->flags |= CTX_FLAG_INITIATOR;
 921         initialContextToken = 1;
 922
 923         *context_handle = ctx;
 924     }
 925
 926     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 927
 928     if (cred == GSS_C_NO_CREDENTIAL) {
 929         if (ctx->defaultCred == GSS_C_NO_CREDENTIAL) {
 930             major = gssEapAcquireCred(minor,
 931                                       GSS_C_NO_NAME,
 932                                       GSS_C_NO_BUFFER,
 933                                       time_req,
 934                                       GSS_C_NO_OID_SET,
 935                                       GSS_C_INITIATE,
 936                                       &ctx->defaultCred,
 937                                       NULL,
 938                                       NULL);
 939             if (GSS_ERROR(major))
 940                 goto cleanup;
 941         }
 942
 943         cred = ctx->defaultCred;
 944     }
 945
 946     GSSEAP_MUTEX_LOCK(&cred->mutex);
 947
 948     if ((cred->flags & CRED_FLAG_INITIATE) == 0) {
 949         major = GSS_S_NO_CRED;
 950         *minor = GSSEAP_CRED_USAGE_MISMATCH;
 951         goto cleanup;
 952     }
 953
 954     if (initialContextToken) {
 955         major = initBegin(minor, cred, ctx, target_name, mech_type,
 956                           req_flags, time_req, input_chan_bindings);
 957         if (GSS_ERROR(major))
 958             goto cleanup;
 959     }
 960
 961     major = gssEapSmStep(minor,
 962                          cred,
 963                          ctx,
 964                          target_name,
 965                          mech_type,
 966                          req_flags,
 967                          time_req,
 968                          input_chan_bindings,
 969                          input_token,
 970                          output_token,
 971                          eapGssInitiatorSm,
 972                          sizeof(eapGssInitiatorSm) / sizeof(eapGssInitiatorSm[0]));
 973     if (GSS_ERROR(major))
 974         goto cleanup;
 975
 976     if (actual_mech_type != NULL) {
 977         if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
 978             duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
 979     }
 980     if (ret_flags != NULL)
 981         *ret_flags = ctx->gssFlags;
 982     if (time_rec != NULL)
 983         gssEapContextTime(&tmpMinor, ctx, time_rec);
 984
 985     assert(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
 986
 987 cleanup:
 988     if (cred != GSS_C_NO_CREDENTIAL)
 989         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
 990     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 991
 992     if (GSS_ERROR(major))
 993         gssEapReleaseContext(&tmpMinor, context_handle);
 994
 995     return major;
 996 }