2 * Copyright (c) 2011, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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.
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.
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
34 * Establish a security context on the initiator (client). These functions
38 #include "gssapiP_eap.h"
39 #include "radius/radius.h"
40 #include "util_radius.h"
41 #include "utils/radius_utils.h"
44 policyVariableToFlag(enum eapol_bool_var variable)
49 case EAPOL_eapSuccess:
50 flag = CTX_FLAG_EAP_SUCCESS;
52 case EAPOL_eapRestart:
53 flag = CTX_FLAG_EAP_RESTART;
56 flag = CTX_FLAG_EAP_FAIL;
59 flag = CTX_FLAG_EAP_RESP;
62 flag = CTX_FLAG_EAP_NO_RESP;
65 flag = CTX_FLAG_EAP_REQ;
67 case EAPOL_portEnabled:
68 flag = CTX_FLAG_EAP_PORT_ENABLED;
71 flag = CTX_FLAG_EAP_ALT_ACCEPT;
74 flag = CTX_FLAG_EAP_ALT_REJECT;
81 static struct eap_peer_config *
82 peerGetConfig(void *ctx)
84 gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
86 return &gssCtx->initiatorCtx.eapPeerConfig;
90 peerGetBool(void *data, enum eapol_bool_var variable)
92 gss_ctx_id_t ctx = data;
95 if (ctx == GSS_C_NO_CONTEXT)
98 flag = policyVariableToFlag(variable);
100 return ((ctx->flags & flag) != 0);
104 peerSetBool(void *data, enum eapol_bool_var variable,
107 gss_ctx_id_t ctx = data;
110 if (ctx == GSS_C_NO_CONTEXT)
113 flag = policyVariableToFlag(variable);
118 ctx->flags &= ~(flag);
122 peerGetInt(void *data, enum eapol_int_var variable)
124 gss_ctx_id_t ctx = data;
126 if (ctx == GSS_C_NO_CONTEXT)
129 GSSEAP_ASSERT(CTX_IS_INITIATOR(ctx));
132 case EAPOL_idleWhile:
133 return ctx->initiatorCtx.idleWhile;
141 peerSetInt(void *data, enum eapol_int_var variable,
144 gss_ctx_id_t ctx = data;
146 if (ctx == GSS_C_NO_CONTEXT)
149 GSSEAP_ASSERT(CTX_IS_INITIATOR(ctx));
152 case EAPOL_idleWhile:
153 ctx->initiatorCtx.idleWhile = value;
158 static struct wpabuf *
159 peerGetEapReqData(void *ctx)
161 gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
163 return &gssCtx->initiatorCtx.reqData;
167 peerSetConfigBlob(void *ctx GSSEAP_UNUSED,
168 struct wpa_config_blob *blob GSSEAP_UNUSED)
172 static const struct wpa_config_blob *
173 peerGetConfigBlob(void *ctx GSSEAP_UNUSED,
174 const char *name GSSEAP_UNUSED)
180 peerNotifyPending(void *ctx GSSEAP_UNUSED)
184 static struct eapol_callbacks gssEapPolicyCallbacks = {
197 extern int wpa_debug_level;
200 #define CHBIND_SERVICE_NAME_FLAG 0x01
201 #define CHBIND_HOST_NAME_FLAG 0x02
202 #define CHBIND_SERVICE_SPECIFIC_FLAG 0x04
203 #define CHBIND_REALM_NAME_FLAG 0x08
206 peerInitEapChannelBinding(OM_uint32 *minor, gss_ctx_id_t ctx)
208 struct wpabuf *buf = NULL;
209 unsigned int chbindReqFlags = 0;
210 krb5_principal princ = NULL;
211 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
212 OM_uint32 major = GSS_S_COMPLETE;
213 krb5_context krbContext = NULL;
215 /* XXX is this check redundant? */
216 if (ctx->acceptorName == GSS_C_NO_NAME) {
217 major = GSS_S_BAD_NAME;
218 *minor = GSSEAP_NO_ACCEPTOR_NAME;
222 princ = ctx->acceptorName->krbPrincipal;
224 krbPrincComponentToGssBuffer(princ, 0, &nameBuf);
225 if (nameBuf.length > 0) {
226 major = gssEapRadiusAddAttr(minor, &buf, PW_GSS_ACCEPTOR_SERVICE_NAME,
228 if (GSS_ERROR(major))
231 chbindReqFlags |= CHBIND_SERVICE_NAME_FLAG;
234 krbPrincComponentToGssBuffer(princ, 1, &nameBuf);
235 if (nameBuf.length > 0) {
236 major = gssEapRadiusAddAttr(minor, &buf, PW_GSS_ACCEPTOR_HOST_NAME,
238 if (GSS_ERROR(major))
241 chbindReqFlags |= CHBIND_HOST_NAME_FLAG;
244 GSSEAP_KRB_INIT(&krbContext);
246 *minor = krbPrincUnparseServiceSpecifics(krbContext, princ, &nameBuf);
250 if (nameBuf.length > 0) {
251 major = gssEapRadiusAddAttr(minor, &buf,
252 PW_GSS_ACCEPTOR_SERVICE_SPECIFICS,
254 if (GSS_ERROR(major))
257 chbindReqFlags |= CHBIND_SERVICE_SPECIFIC_FLAG;
260 krbFreeUnparsedName(krbContext, &nameBuf);
261 krbPrincRealmToGssBuffer(princ, &nameBuf);
263 if (nameBuf.length > 0) {
264 major = gssEapRadiusAddAttr(minor, &buf,
265 PW_GSS_ACCEPTOR_REALM_NAME,
267 chbindReqFlags |= CHBIND_REALM_NAME_FLAG;
270 if (chbindReqFlags == 0) {
271 major = GSS_S_BAD_NAME;
272 *minor = GSSEAP_BAD_ACCEPTOR_NAME;
276 ctx->initiatorCtx.chbindData = buf;
277 ctx->initiatorCtx.chbindReqFlags = chbindReqFlags;
281 major = GSS_S_COMPLETE;
285 krbFreeUnparsedName(krbContext, &nameBuf);
292 peerProcessChbindResponse(void *context, int code, int nsid,
293 u8 *data, size_t len)
296 gss_ctx_id_t ctx = (gss_ctx_id_t )context;
300 u32 chbindRetFlags = 0;
303 if (nsid != CHBIND_NSID_RADIUS)
306 msg = radius_parser_start(data, len);
310 while (radius_parser_parse_tlv(msg, &type, &vendor_id, &vsadata,
311 &vsadata_len) == 0) {
313 case PW_GSS_ACCEPTOR_SERVICE_NAME:
314 chbindRetFlags |= CHBIND_SERVICE_NAME_FLAG;
316 case PW_GSS_ACCEPTOR_HOST_NAME:
317 chbindRetFlags |= CHBIND_HOST_NAME_FLAG;
319 case PW_GSS_ACCEPTOR_SERVICE_SPECIFICS:
320 chbindRetFlags |= CHBIND_SERVICE_SPECIFIC_FLAG;
322 case PW_GSS_ACCEPTOR_REALM_NAME:
323 chbindRetFlags |= CHBIND_REALM_NAME_FLAG;
328 radius_parser_finish(msg);
330 if (code == CHBIND_CODE_SUCCESS &&
331 ((chbindRetFlags & ctx->initiatorCtx.chbindReqFlags) == ctx->initiatorCtx.chbindReqFlags)) {
332 ctx->flags |= CTX_FLAG_EAP_CHBIND_ACCEPT;
333 ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
334 } /* else log failures? */
338 peerConfigInit(OM_uint32 *minor, gss_ctx_id_t ctx)
341 krb5_context krbContext;
342 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
343 gss_buffer_desc identity = GSS_C_EMPTY_BUFFER;
344 gss_buffer_desc realm = GSS_C_EMPTY_BUFFER;
345 gss_cred_id_t cred = ctx->cred;
347 eapPeerConfig->identity = NULL;
348 eapPeerConfig->identity_len = 0;
349 eapPeerConfig->anonymous_identity = NULL;
350 eapPeerConfig->anonymous_identity_len = 0;
351 eapPeerConfig->password = NULL;
352 eapPeerConfig->password_len = 0;
354 GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
356 GSSEAP_KRB_INIT(&krbContext);
358 eapPeerConfig->fragment_size = 1024;
363 GSSEAP_ASSERT(cred->name != GSS_C_NO_NAME);
365 if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
366 *minor = GSSEAP_BAD_INITIATOR_NAME;
367 return GSS_S_BAD_NAME;
371 major = gssEapDisplayName(minor, cred->name, &identity, NULL);
372 if (GSS_ERROR(major))
375 eapPeerConfig->identity = (unsigned char *)identity.value;
376 eapPeerConfig->identity_len = identity.length;
378 krbPrincRealmToGssBuffer(cred->name->krbPrincipal, &realm);
380 /* anonymous_identity */
381 eapPeerConfig->anonymous_identity = GSSEAP_MALLOC(realm.length + 2);
382 if (eapPeerConfig->anonymous_identity == NULL) {
384 return GSS_S_FAILURE;
387 eapPeerConfig->anonymous_identity[0] = '@';
388 memcpy(eapPeerConfig->anonymous_identity + 1, realm.value, realm.length);
389 eapPeerConfig->anonymous_identity[1 + realm.length] = '\0';
390 eapPeerConfig->anonymous_identity_len = 1 + realm.length;
393 eapPeerConfig->password = (unsigned char *)cred->password.value;
394 eapPeerConfig->password_len = cred->password.length;
397 eapPeerConfig->ca_cert = (unsigned char *)cred->caCertificate.value;
398 eapPeerConfig->subject_match = (unsigned char *)cred->subjectNameConstraint.value;
399 eapPeerConfig->altsubject_match = (unsigned char *)cred->subjectAltNameConstraint.value;
401 /* eap channel binding */
402 if (ctx->initiatorCtx.chbindData != NULL) {
403 struct eap_peer_chbind_config *chbind_config =
404 (struct eap_peer_chbind_config *)GSSEAP_MALLOC(sizeof(struct eap_peer_chbind_config));
405 if (chbind_config == NULL) {
407 return GSS_S_FAILURE;
410 chbind_config->req_data = wpabuf_mhead_u8(ctx->initiatorCtx.chbindData);
411 chbind_config->req_data_len = wpabuf_len(ctx->initiatorCtx.chbindData);
412 chbind_config->nsid = CHBIND_NSID_RADIUS;
413 chbind_config->response_cb = &peerProcessChbindResponse;
414 chbind_config->ctx = ctx;
415 eapPeerConfig->chbind_config = chbind_config;
416 eapPeerConfig->chbind_config_len = 1;
418 eapPeerConfig->chbind_config = NULL;
419 eapPeerConfig->chbind_config_len = 0;
423 return GSS_S_COMPLETE;
427 peerConfigFree(OM_uint32 *minor,
430 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
432 if (eapPeerConfig->identity != NULL) {
433 GSSEAP_FREE(eapPeerConfig->identity);
434 eapPeerConfig->identity = NULL;
435 eapPeerConfig->identity_len = 0;
438 if (eapPeerConfig->anonymous_identity != NULL) {
439 GSSEAP_FREE(eapPeerConfig->anonymous_identity);
440 eapPeerConfig->anonymous_identity = NULL;
441 eapPeerConfig->anonymous_identity_len = 0;
445 return GSS_S_COMPLETE;
449 * Mark an initiator context as ready for cryptographic operations
452 initReady(OM_uint32 *minor, gss_ctx_id_t ctx)
455 const unsigned char *key;
458 /* Cache encryption type derived from selected mechanism OID */
459 major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
460 if (GSS_ERROR(major))
463 if (!eap_key_available(ctx->initiatorCtx.eap)) {
464 *minor = GSSEAP_KEY_UNAVAILABLE;
465 return GSS_S_UNAVAILABLE;
468 key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
470 if (keyLength < EAP_EMSK_LEN) {
471 *minor = GSSEAP_KEY_TOO_SHORT;
472 return GSS_S_UNAVAILABLE;
475 major = gssEapDeriveRfc3961Key(minor,
476 &key[EAP_EMSK_LEN / 2],
480 if (GSS_ERROR(major))
483 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
485 if (GSS_ERROR(major))
488 major = sequenceInit(minor,
491 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
492 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
494 if (GSS_ERROR(major))
498 return GSS_S_COMPLETE;
502 initBegin(OM_uint32 *minor,
506 OM_uint32 reqFlags GSSEAP_UNUSED,
508 gss_channel_bindings_t chanBindings GSSEAP_UNUSED)
511 gss_cred_id_t cred = ctx->cred;
513 GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
515 if (cred->expiryTime)
516 ctx->expiryTime = cred->expiryTime;
517 else if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
520 ctx->expiryTime = time(NULL) + timeReq;
523 * The credential mutex protects its name, however we need to
524 * explicitly lock the acceptor name (unlikely as it may be
525 * that it has attributes set on it).
527 major = gssEapDuplicateName(minor, cred->name, &ctx->initiatorName);
528 if (GSS_ERROR(major))
531 if (target != GSS_C_NO_NAME) {
532 GSSEAP_MUTEX_LOCK(&target->mutex);
534 major = gssEapDuplicateName(minor, target, &ctx->acceptorName);
535 if (GSS_ERROR(major)) {
536 GSSEAP_MUTEX_UNLOCK(&target->mutex);
540 GSSEAP_MUTEX_UNLOCK(&target->mutex);
543 major = gssEapCanonicalizeOid(minor,
545 OID_FLAG_NULL_VALID | OID_FLAG_MAP_NULL_TO_DEFAULT_MECH,
546 &ctx->mechanismUsed);
547 if (GSS_ERROR(major))
550 /* If credentials were provided, check they're usable with this mech */
551 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
552 *minor = GSSEAP_CRED_MECH_MISMATCH;
553 return GSS_S_BAD_MECH;
557 return GSS_S_COMPLETE;
561 eapGssSmInitError(OM_uint32 *minor,
562 gss_cred_id_t cred GSSEAP_UNUSED,
563 gss_ctx_id_t ctx GSSEAP_UNUSED,
564 gss_name_t target GSSEAP_UNUSED,
565 gss_OID mech GSSEAP_UNUSED,
566 OM_uint32 reqFlags GSSEAP_UNUSED,
567 OM_uint32 timeReq GSSEAP_UNUSED,
568 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
569 gss_buffer_t inputToken,
570 gss_buffer_t outputToken GSSEAP_UNUSED,
571 OM_uint32 *smFlags GSSEAP_UNUSED)
576 if (inputToken->length < 8) {
577 *minor = GSSEAP_TOK_TRUNC;
578 return GSS_S_DEFECTIVE_TOKEN;
581 p = (unsigned char *)inputToken->value;
583 major = load_uint32_be(&p[0]);
584 *minor = ERROR_TABLE_BASE_eapg + load_uint32_be(&p[4]);
586 if (!GSS_ERROR(major) || !IS_WIRE_ERROR(*minor)) {
587 major = GSS_S_FAILURE;
588 *minor = GSSEAP_BAD_ERROR_TOKEN;
591 GSSEAP_ASSERT(GSS_ERROR(major));
596 #ifdef GSSEAP_ENABLE_REAUTH
598 eapGssSmInitGssReauth(OM_uint32 *minor,
602 gss_OID mech GSSEAP_UNUSED,
605 gss_channel_bindings_t chanBindings,
606 gss_buffer_t inputToken,
607 gss_buffer_t outputToken,
608 OM_uint32 *smFlags GSSEAP_UNUSED)
610 OM_uint32 major, tmpMinor;
611 gss_name_t mechTarget = GSS_C_NO_NAME;
612 gss_OID actualMech = GSS_C_NO_OID;
613 OM_uint32 gssFlags, timeRec;
616 * Here we use the passed in credential handle because the resolved
617 * context credential does not currently have the reauth creds.
619 if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
620 if (!gssEapCanReauthP(cred, target, timeReq))
621 return GSS_S_CONTINUE_NEEDED;
623 ctx->flags |= CTX_FLAG_KRB_REAUTH;
624 } else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
625 major = GSS_S_DEFECTIVE_TOKEN;
626 *minor = GSSEAP_WRONG_ITOK;
630 GSSEAP_ASSERT(cred != GSS_C_NO_CREDENTIAL);
632 major = gssEapMechToGlueName(minor, target, &mechTarget);
633 if (GSS_ERROR(major))
636 major = gssInitSecContext(minor,
640 (gss_OID)gss_mech_krb5,
641 reqFlags | GSS_C_MUTUAL_FLAG,
649 if (GSS_ERROR(major))
652 ctx->gssFlags = gssFlags;
654 if (major == GSS_S_COMPLETE) {
655 GSSEAP_ASSERT(GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE);
657 major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
658 if (GSS_ERROR(major))
660 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
662 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
666 gssReleaseName(&tmpMinor, &mechTarget);
670 #endif /* GSSEAP_ENABLE_REAUTH */
674 eapGssSmInitVendorInfo(OM_uint32 *minor,
675 gss_cred_id_t cred GSSEAP_UNUSED,
676 gss_ctx_id_t ctx GSSEAP_UNUSED,
677 gss_name_t target GSSEAP_UNUSED,
678 gss_OID mech GSSEAP_UNUSED,
679 OM_uint32 reqFlags GSSEAP_UNUSED,
680 OM_uint32 timeReq GSSEAP_UNUSED,
681 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
682 gss_buffer_t inputToken GSSEAP_UNUSED,
683 gss_buffer_t outputToken,
684 OM_uint32 *smFlags GSSEAP_UNUSED)
688 major = makeStringBuffer(minor, "JANET(UK)", outputToken);
689 if (GSS_ERROR(major))
692 return GSS_S_CONTINUE_NEEDED;
697 eapGssSmInitAcceptorName(OM_uint32 *minor,
698 gss_cred_id_t cred GSSEAP_UNUSED,
700 gss_name_t target GSSEAP_UNUSED,
701 gss_OID mech GSSEAP_UNUSED,
702 OM_uint32 reqFlags GSSEAP_UNUSED,
703 OM_uint32 timeReq GSSEAP_UNUSED,
704 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
705 gss_buffer_t inputToken GSSEAP_UNUSED,
706 gss_buffer_t outputToken,
707 OM_uint32 *smFlags GSSEAP_UNUSED)
711 if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL &&
712 ctx->acceptorName != GSS_C_NO_NAME) {
714 /* Send desired target name to acceptor */
715 major = gssEapDisplayName(minor, ctx->acceptorName,
717 if (GSS_ERROR(major))
719 } else if (inputToken != GSS_C_NO_BUFFER) {
724 /* Accept target name hint from acceptor or verify acceptor */
725 major = gssEapImportName(minor, inputToken,
729 if (GSS_ERROR(major))
732 if (ctx->acceptorName != GSS_C_NO_NAME) {
733 /* verify name hint matched asserted acceptor name */
734 major = gssEapCompareName(minor,
737 COMPARE_NAME_FLAG_IGNORE_EMPTY_REALMS,
739 if (GSS_ERROR(major)) {
740 gssEapReleaseName(&tmpMinor, &nameHint);
744 gssEapReleaseName(&tmpMinor, &nameHint);
747 *minor = GSSEAP_WRONG_ACCEPTOR_NAME;
748 return GSS_S_DEFECTIVE_TOKEN;
750 } else { /* acceptor name is no_name */
751 /* accept acceptor name hint */
752 ctx->acceptorName = nameHint;
753 nameHint = GSS_C_NO_NAME;
759 * Currently, other parts of the code assume that the acceptor name
760 * is available, hence this check.
762 if (ctx->acceptorName == GSS_C_NO_NAME) {
763 *minor = GSSEAP_NO_ACCEPTOR_NAME;
764 return GSS_S_FAILURE;
768 * Generate channel binding data
770 if (ctx->initiatorCtx.chbindData == NULL) {
771 major = peerInitEapChannelBinding(minor, ctx);
772 if (GSS_ERROR(major))
776 return GSS_S_CONTINUE_NEEDED;
780 eapGssSmInitIdentity(OM_uint32 *minor,
781 gss_cred_id_t cred GSSEAP_UNUSED,
783 gss_name_t target GSSEAP_UNUSED,
784 gss_OID mech GSSEAP_UNUSED,
785 OM_uint32 reqFlags GSSEAP_UNUSED,
786 OM_uint32 timeReq GSSEAP_UNUSED,
787 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
788 gss_buffer_t inputToken GSSEAP_UNUSED,
789 gss_buffer_t outputToken GSSEAP_UNUSED,
792 struct eap_config eapConfig;
794 #ifdef GSSEAP_ENABLE_REAUTH
795 if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE) {
798 /* server didn't support reauthentication, sent EAP request */
799 gssDeleteSecContext(&tmpMinor, &ctx->reauthCtx, GSS_C_NO_BUFFER);
800 ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
801 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
804 *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
806 GSSEAP_ASSERT((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
807 GSSEAP_ASSERT(inputToken == GSS_C_NO_BUFFER);
809 memset(&eapConfig, 0, sizeof(eapConfig));
811 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
812 &gssEapPolicyCallbacks,
815 if (ctx->initiatorCtx.eap == NULL) {
816 *minor = GSSEAP_PEER_SM_INIT_FAILURE;
817 return GSS_S_FAILURE;
820 ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
822 /* poke EAP state machine */
823 if (eap_peer_sm_step(ctx->initiatorCtx.eap) != 0) {
824 *minor = GSSEAP_PEER_SM_STEP_FAILURE;
825 return GSS_S_FAILURE;
828 GSSEAP_SM_TRANSITION_NEXT(ctx);
832 return GSS_S_CONTINUE_NEEDED;
836 eapGssSmInitAuthenticate(OM_uint32 *minor,
837 gss_cred_id_t cred GSSEAP_UNUSED,
839 gss_name_t target GSSEAP_UNUSED,
840 gss_OID mech GSSEAP_UNUSED,
841 OM_uint32 reqFlags GSSEAP_UNUSED,
842 OM_uint32 timeReq GSSEAP_UNUSED,
843 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
844 gss_buffer_t inputToken GSSEAP_UNUSED,
845 gss_buffer_t outputToken,
850 struct wpabuf *resp = NULL;
854 GSSEAP_ASSERT(inputToken != GSS_C_NO_BUFFER);
856 major = peerConfigInit(minor, ctx);
857 if (GSS_ERROR(major))
860 GSSEAP_ASSERT(ctx->initiatorCtx.eap != NULL);
861 GSSEAP_ASSERT(ctx->flags & CTX_FLAG_EAP_PORT_ENABLED);
863 ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
865 wpabuf_set(&ctx->initiatorCtx.reqData,
866 inputToken->value, inputToken->length);
868 major = GSS_S_CONTINUE_NEEDED;
870 eap_peer_sm_step(ctx->initiatorCtx.eap);
871 if (ctx->flags & CTX_FLAG_EAP_RESP) {
872 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
874 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
875 } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
876 major = initReady(minor, ctx);
877 if (GSS_ERROR(major))
880 ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
881 major = GSS_S_CONTINUE_NEEDED;
882 GSSEAP_SM_TRANSITION_NEXT(ctx);
883 } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
884 major = GSS_S_DEFECTIVE_CREDENTIAL;
885 *minor = GSSEAP_PEER_AUTH_FAILURE;
887 major = GSS_S_DEFECTIVE_TOKEN;
888 *minor = GSSEAP_PEER_BAD_MESSAGE;
894 gss_buffer_desc respBuf;
896 GSSEAP_ASSERT(major == GSS_S_CONTINUE_NEEDED);
898 respBuf.length = wpabuf_len(resp);
899 respBuf.value = (void *)wpabuf_head(resp);
901 tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
902 if (GSS_ERROR(tmpMajor)) {
907 *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
910 wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
911 peerConfigFree(&tmpMinor, ctx);
917 eapGssSmInitGssFlags(OM_uint32 *minor,
918 gss_cred_id_t cred GSSEAP_UNUSED,
920 gss_name_t target GSSEAP_UNUSED,
921 gss_OID mech GSSEAP_UNUSED,
922 OM_uint32 reqFlags GSSEAP_UNUSED,
923 OM_uint32 timeReq GSSEAP_UNUSED,
924 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
925 gss_buffer_t inputToken GSSEAP_UNUSED,
926 gss_buffer_t outputToken,
927 OM_uint32 *smFlags GSSEAP_UNUSED)
929 unsigned char wireFlags[4];
930 gss_buffer_desc flagsBuf;
932 store_uint32_be(ctx->gssFlags & GSSEAP_WIRE_FLAGS_MASK, wireFlags);
934 flagsBuf.length = sizeof(wireFlags);
935 flagsBuf.value = wireFlags;
937 return duplicateBuffer(minor, &flagsBuf, outputToken);
941 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
942 gss_cred_id_t cred GSSEAP_UNUSED,
944 gss_name_t target GSSEAP_UNUSED,
945 gss_OID mech GSSEAP_UNUSED,
946 OM_uint32 reqFlags GSSEAP_UNUSED,
947 OM_uint32 timeReq GSSEAP_UNUSED,
948 gss_channel_bindings_t chanBindings,
949 gss_buffer_t inputToken GSSEAP_UNUSED,
950 gss_buffer_t outputToken,
954 krb5_error_code code;
955 krb5_context krbContext;
958 gss_buffer_desc cksumBuffer;
960 if (chanBindings == GSS_C_NO_CHANNEL_BINDINGS ||
961 chanBindings->application_data.length == 0)
962 return GSS_S_CONTINUE_NEEDED;
964 GSSEAP_KRB_INIT(&krbContext);
966 KRB_DATA_INIT(&data);
968 gssBufferToKrbData(&chanBindings->application_data, &data);
970 code = krb5_c_make_checksum(krbContext, ctx->checksumType,
972 KEY_USAGE_GSSEAP_CHBIND_MIC,
976 return GSS_S_FAILURE;
979 cksumBuffer.length = KRB_CHECKSUM_LENGTH(&cksum);
980 cksumBuffer.value = KRB_CHECKSUM_DATA(&cksum);
982 major = duplicateBuffer(minor, &cksumBuffer, outputToken);
983 if (GSS_ERROR(major)) {
984 krb5_free_checksum_contents(krbContext, &cksum);
989 *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
991 krb5_free_checksum_contents(krbContext, &cksum);
993 return GSS_S_CONTINUE_NEEDED;
997 eapGssSmInitInitiatorMIC(OM_uint32 *minor,
998 gss_cred_id_t cred GSSEAP_UNUSED,
1000 gss_name_t target GSSEAP_UNUSED,
1001 gss_OID mech GSSEAP_UNUSED,
1002 OM_uint32 reqFlags GSSEAP_UNUSED,
1003 OM_uint32 timeReq GSSEAP_UNUSED,
1004 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1005 gss_buffer_t inputToken GSSEAP_UNUSED,
1006 gss_buffer_t outputToken,
1011 major = gssEapMakeTokenMIC(minor, ctx, outputToken);
1012 if (GSS_ERROR(major))
1015 GSSEAP_SM_TRANSITION_NEXT(ctx);
1018 *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
1020 return GSS_S_CONTINUE_NEEDED;
1023 #ifdef GSSEAP_ENABLE_REAUTH
1025 eapGssSmInitReauthCreds(OM_uint32 *minor,
1028 gss_name_t target GSSEAP_UNUSED,
1029 gss_OID mech GSSEAP_UNUSED,
1030 OM_uint32 reqFlags GSSEAP_UNUSED,
1031 OM_uint32 timeReq GSSEAP_UNUSED,
1032 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1033 gss_buffer_t inputToken,
1034 gss_buffer_t outputToken GSSEAP_UNUSED,
1035 OM_uint32 *smFlags GSSEAP_UNUSED)
1039 if (ctx->gssFlags & GSS_C_MUTUAL_FLAG) {
1040 major = gssEapStoreReauthCreds(minor, ctx, cred, inputToken);
1041 if (GSS_ERROR(major))
1046 return GSS_S_CONTINUE_NEEDED;
1048 #endif /* GSSEAP_ENABLE_REAUTH */
1051 eapGssSmInitAcceptorMIC(OM_uint32 *minor,
1052 gss_cred_id_t cred GSSEAP_UNUSED,
1054 gss_name_t target GSSEAP_UNUSED,
1055 gss_OID mech GSSEAP_UNUSED,
1056 OM_uint32 reqFlags GSSEAP_UNUSED,
1057 OM_uint32 timeReq GSSEAP_UNUSED,
1058 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
1059 gss_buffer_t inputToken,
1060 gss_buffer_t outputToken GSSEAP_UNUSED,
1061 OM_uint32 *smFlags GSSEAP_UNUSED)
1065 major = gssEapVerifyTokenMIC(minor, ctx, inputToken);
1066 if (GSS_ERROR(major))
1070 * As a temporary measure, force mutual authentication until channel binding is
1071 * more widely deployed.
1073 ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
1074 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
1078 return GSS_S_COMPLETE;
1081 static struct gss_eap_sm eapGssInitiatorSm[] = {
1083 ITOK_TYPE_CONTEXT_ERR,
1085 GSSEAP_STATE_ALL & ~(GSSEAP_STATE_INITIAL),
1090 ITOK_TYPE_ACCEPTOR_NAME_RESP,
1091 ITOK_TYPE_ACCEPTOR_NAME_REQ,
1092 GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE |
1093 GSSEAP_STATE_ACCEPTOR_EXTS,
1095 eapGssSmInitAcceptorName
1100 ITOK_TYPE_VENDOR_INFO,
1101 GSSEAP_STATE_INITIAL,
1103 eapGssSmInitVendorInfo
1106 #ifdef GSSEAP_ENABLE_REAUTH
1108 ITOK_TYPE_REAUTH_RESP,
1109 ITOK_TYPE_REAUTH_REQ,
1110 GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
1112 eapGssSmInitGssReauth
1118 #ifdef GSSEAP_ENABLE_REAUTH
1119 GSSEAP_STATE_REAUTHENTICATE |
1121 GSSEAP_STATE_INITIAL,
1122 SM_ITOK_FLAG_REQUIRED,
1123 eapGssSmInitIdentity
1128 GSSEAP_STATE_AUTHENTICATE,
1129 SM_ITOK_FLAG_REQUIRED,
1130 eapGssSmInitAuthenticate
1134 ITOK_TYPE_GSS_FLAGS,
1135 GSSEAP_STATE_INITIATOR_EXTS,
1137 eapGssSmInitGssFlags
1141 ITOK_TYPE_GSS_CHANNEL_BINDINGS,
1142 GSSEAP_STATE_INITIATOR_EXTS,
1144 eapGssSmInitGssChannelBindings
1148 ITOK_TYPE_INITIATOR_MIC,
1149 GSSEAP_STATE_INITIATOR_EXTS,
1150 SM_ITOK_FLAG_REQUIRED,
1151 eapGssSmInitInitiatorMIC
1153 #ifdef GSSEAP_ENABLE_REAUTH
1155 ITOK_TYPE_REAUTH_CREDS,
1157 GSSEAP_STATE_ACCEPTOR_EXTS,
1159 eapGssSmInitReauthCreds
1162 /* other extensions go here */
1164 ITOK_TYPE_ACCEPTOR_MIC,
1166 GSSEAP_STATE_ACCEPTOR_EXTS,
1167 SM_ITOK_FLAG_REQUIRED,
1168 eapGssSmInitAcceptorMIC
1173 gssEapInitSecContext(OM_uint32 *minor,
1176 gss_name_t target_name,
1178 OM_uint32 req_flags,
1180 gss_channel_bindings_t input_chan_bindings,
1181 gss_buffer_t input_token,
1182 gss_OID *actual_mech_type,
1183 gss_buffer_t output_token,
1184 OM_uint32 *ret_flags,
1185 OM_uint32 *time_rec)
1187 OM_uint32 major, tmpMinor;
1188 int initialContextToken = (ctx->mechanismUsed == GSS_C_NO_OID);
1191 * XXX is acquiring the credential lock here necessary? The password is
1192 * mutable but the contract could specify that this is not updated whilst
1193 * a context is being initialized.
1195 if (cred != GSS_C_NO_CREDENTIAL)
1196 GSSEAP_MUTEX_LOCK(&cred->mutex);
1198 if (ctx->cred == GSS_C_NO_CREDENTIAL) {
1199 major = gssEapResolveInitiatorCred(minor, cred, target_name, &ctx->cred);
1200 if (GSS_ERROR(major))
1203 GSSEAP_ASSERT(ctx->cred != GSS_C_NO_CREDENTIAL);
1206 GSSEAP_MUTEX_LOCK(&ctx->cred->mutex);
1208 GSSEAP_ASSERT(ctx->cred->flags & CRED_FLAG_RESOLVED);
1209 GSSEAP_ASSERT(ctx->cred->flags & CRED_FLAG_INITIATE);
1211 if (initialContextToken) {
1212 major = initBegin(minor, ctx, target_name, mech_type,
1213 req_flags, time_req, input_chan_bindings);
1214 if (GSS_ERROR(major))
1218 major = gssEapSmStep(minor,
1225 input_chan_bindings,
1229 sizeof(eapGssInitiatorSm) / sizeof(eapGssInitiatorSm[0]));
1230 if (GSS_ERROR(major))
1233 if (actual_mech_type != NULL) {
1236 tmpMajor = gssEapCanonicalizeOid(&tmpMinor, ctx->mechanismUsed, 0, actual_mech_type);
1237 if (GSS_ERROR(tmpMajor)) {
1244 if (ret_flags != NULL)
1245 *ret_flags = ctx->gssFlags;
1247 if (time_rec != NULL)
1248 gssEapContextTime(&tmpMinor, ctx, time_rec);
1250 GSSEAP_ASSERT(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
1253 if (cred != GSS_C_NO_CREDENTIAL)
1254 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
1255 if (ctx->cred != GSS_C_NO_CREDENTIAL)
1256 GSSEAP_MUTEX_UNLOCK(&ctx->cred->mutex);
1261 OM_uint32 GSSAPI_CALLCONV
1262 gss_init_sec_context(OM_uint32 *minor,
1264 gss_ctx_id_t *context_handle,
1265 gss_name_t target_name,
1267 OM_uint32 req_flags,
1269 gss_channel_bindings_t input_chan_bindings,
1270 gss_buffer_t input_token,
1271 gss_OID *actual_mech_type,
1272 gss_buffer_t output_token,
1273 OM_uint32 *ret_flags,
1274 OM_uint32 *time_rec)
1276 OM_uint32 major, tmpMinor;
1277 gss_ctx_id_t ctx = *context_handle;
1281 output_token->length = 0;
1282 output_token->value = NULL;
1284 if (ctx == GSS_C_NO_CONTEXT) {
1285 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
1286 *minor = GSSEAP_WRONG_SIZE;
1287 return GSS_S_DEFECTIVE_TOKEN;
1290 major = gssEapAllocContext(minor, &ctx);
1291 if (GSS_ERROR(major))
1294 ctx->flags |= CTX_FLAG_INITIATOR;
1296 *context_handle = ctx;
1299 GSSEAP_MUTEX_LOCK(&ctx->mutex);
1301 major = gssEapInitSecContext(minor,
1308 input_chan_bindings,
1315 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
1317 if (GSS_ERROR(major))
1318 gssEapReleaseContext(&tmpMinor, context_handle);