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34 * Establish a security context on the acceptor (server). These functions
35 * wrap around libradsec and (thus) talk to a RADIUS server or proxy.
38 #include "gssapiP_eap.h"
40 #ifdef GSSEAP_ENABLE_REAUTH
42 eapGssSmAcceptGssReauth(OM_uint32 *minor,
49 gss_channel_bindings_t chanBindings,
50 gss_buffer_t inputToken,
51 gss_buffer_t outputToken,
56 * Mark an acceptor context as ready for cryptographic operations
59 acceptReadyEap(OM_uint32 *minor, gss_ctx_id_t ctx, gss_cred_id_t cred)
61 OM_uint32 major, tmpMinor;
63 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
65 /* Cache encryption type derived from selected mechanism OID */
66 major = gssEapOidToEnctype(minor, ctx->mechanismUsed,
67 &ctx->encryptionType);
71 gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
73 major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
74 PW_USER_NAME, 0, &vp);
75 if (major == GSS_S_COMPLETE) {
76 nameBuf.length = vp->length;
77 nameBuf.value = vp->vp_strvalue;
79 ctx->gssFlags |= GSS_C_ANON_FLAG;
82 major = gssEapImportName(minor, &nameBuf,
83 (ctx->gssFlags & GSS_C_ANON_FLAG) ?
84 GSS_C_NT_ANONYMOUS : GSS_C_NT_USER_NAME,
90 major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
91 PW_MS_MPPE_SEND_KEY, VENDORPEC_MS, &vp);
92 if (GSS_ERROR(major)) {
93 *minor = GSSEAP_KEY_UNAVAILABLE;
94 return GSS_S_UNAVAILABLE;
97 major = gssEapDeriveRfc3961Key(minor,
102 if (GSS_ERROR(major))
105 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
107 if (GSS_ERROR(major))
110 major = sequenceInit(minor,
111 &ctx->seqState, ctx->recvSeq,
112 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
113 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
115 if (GSS_ERROR(major))
118 major = gssEapCreateAttrContext(minor, cred, ctx,
119 &ctx->initiatorName->attrCtx,
121 if (GSS_ERROR(major))
125 return GSS_S_COMPLETE;
129 gssEapSupportedInitiatorExts[] = {
132 static struct gss_eap_itok_map
133 gssEapAcceptorExtsFlagMap[] = {
134 { ITOK_TYPE_REAUTH_CREDS, CTX_FLAG_KRB_REAUTH_SUPPORTED },
138 eapGssSmAcceptExts(OM_uint32 *minor,
139 gss_cred_id_t cred GSSEAP_UNUSED,
140 gss_ctx_id_t ctx GSSEAP_UNUSED,
141 gss_name_t target GSSEAP_UNUSED,
142 gss_OID mech GSSEAP_UNUSED,
143 OM_uint32 reqFlags GSSEAP_UNUSED,
144 OM_uint32 timeReq GSSEAP_UNUSED,
145 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
146 gss_buffer_t inputToken,
147 gss_buffer_t outputToken,
148 OM_uint32 *smFlags GSSEAP_UNUSED)
152 major = gssEapProcessSupportedExts(minor, inputToken,
153 gssEapAcceptorExtsFlagMap,
154 sizeof(gssEapAcceptorExtsFlagMap) /
155 sizeof(gssEapAcceptorExtsFlagMap[0]),
157 if (GSS_ERROR(major))
160 major = gssEapEncodeSupportedExts(minor,
161 gssEapSupportedInitiatorExts,
162 sizeof(gssEapSupportedInitiatorExts) /
163 sizeof(gssEapSupportedInitiatorExts[0]),
165 if (GSS_ERROR(major))
168 return GSS_S_CONTINUE_NEEDED;
172 eapGssSmAcceptAcceptorName(OM_uint32 *minor,
173 gss_cred_id_t cred GSSEAP_UNUSED,
175 gss_name_t target GSSEAP_UNUSED,
176 gss_OID mech GSSEAP_UNUSED,
177 OM_uint32 reqFlags GSSEAP_UNUSED,
178 OM_uint32 timeReq GSSEAP_UNUSED,
179 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
180 gss_buffer_t inputToken GSSEAP_UNUSED,
181 gss_buffer_t outputToken,
182 OM_uint32 *smFlags GSSEAP_UNUSED)
186 /* XXX TODO import and validate name from inputToken */
188 if (ctx->acceptorName != GSS_C_NO_NAME) {
189 /* Send desired target name to acceptor */
190 major = gssEapDisplayName(minor, ctx->acceptorName,
192 if (GSS_ERROR(major))
196 return GSS_S_CONTINUE_NEEDED;
201 eapGssSmAcceptVendorInfo(OM_uint32 *minor,
202 gss_cred_id_t cred GSSEAP_UNUSED,
203 gss_ctx_id_t ctx GSSEAP_UNUSED,
204 gss_name_t target GSSEAP_UNUSED,
205 gss_OID mech GSSEAP_UNUSED,
206 OM_uint32 reqFlags GSSEAP_UNUSED,
207 OM_uint32 timeReq GSSEAP_UNUSED,
208 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
209 gss_buffer_t inputToken,
210 gss_buffer_t outputToken GSSEAP_UNUSED,
211 OM_uint32 *smFlags GSSEAP_UNUSED)
213 fprintf(stderr, "GSS-EAP: vendor: %.*s\n",
214 (int)inputToken->length, (char *)inputToken->value);
217 return GSS_S_CONTINUE_NEEDED;
223 * Emit a identity EAP request to force the initiator (peer) to identify
227 eapGssSmAcceptIdentity(OM_uint32 *minor,
230 gss_name_t target GSSEAP_UNUSED,
231 gss_OID mech GSSEAP_UNUSED,
232 OM_uint32 reqFlags GSSEAP_UNUSED,
233 OM_uint32 timeReq GSSEAP_UNUSED,
234 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
235 gss_buffer_t inputToken,
236 gss_buffer_t outputToken,
240 struct wpabuf *reqData;
241 gss_buffer_desc pktBuffer;
243 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
244 *minor = GSSEAP_CRED_MECH_MISMATCH;
245 return GSS_S_BAD_MECH;
248 if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0) {
249 *minor = GSSEAP_WRONG_SIZE;
250 return GSS_S_DEFECTIVE_TOKEN;
253 reqData = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY, 0,
254 EAP_CODE_REQUEST, 0);
255 if (reqData == NULL) {
257 return GSS_S_FAILURE;
260 pktBuffer.length = wpabuf_len(reqData);
261 pktBuffer.value = (void *)wpabuf_head(reqData);
263 major = duplicateBuffer(minor, &pktBuffer, outputToken);
264 if (GSS_ERROR(major))
267 wpabuf_free(reqData);
269 GSSEAP_SM_TRANSITION_NEXT(ctx);
272 *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
274 return GSS_S_CONTINUE_NEEDED;
278 * Returns TRUE if the input token contains an EAP identity response.
281 isIdentityResponseP(gss_buffer_t inputToken)
283 struct wpabuf respData;
285 wpabuf_set(&respData, inputToken->value, inputToken->length);
287 return (eap_get_type(&respData) == EAP_TYPE_IDENTITY);
291 * Save the asserted initiator identity from the EAP identity response.
294 importInitiatorIdentity(OM_uint32 *minor,
296 gss_buffer_t inputToken)
299 struct wpabuf respData;
300 const unsigned char *pos;
302 gss_buffer_desc nameBuf;
304 wpabuf_set(&respData, inputToken->value, inputToken->length);
306 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
309 *minor = GSSEAP_PEER_BAD_MESSAGE;
310 return GSS_S_DEFECTIVE_TOKEN;
313 nameBuf.value = (void *)pos;
314 nameBuf.length = len;
316 gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
318 return gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
319 ctx->mechanismUsed, &ctx->initiatorName);
323 * Pass the asserted initiator identity to the authentication server.
326 setInitiatorIdentity(OM_uint32 *minor,
330 OM_uint32 major, tmpMinor;
331 gss_buffer_desc nameBuf;
334 * We should have got an EAP identity response, but if we didn't, then
335 * we will just avoid sending User-Name. Note that radsecproxy requires
336 * User-Name to be sent on every request (presumably so it can remain
339 if (ctx->initiatorName != GSS_C_NO_NAME) {
340 major = gssEapDisplayName(minor, ctx->initiatorName, &nameBuf, NULL);
341 if (GSS_ERROR(major))
344 major = gssEapRadiusAddAvp(minor, vps, PW_USER_NAME, 0, &nameBuf);
345 if (GSS_ERROR(major))
348 gss_release_buffer(&tmpMinor, &nameBuf);
352 return GSS_S_COMPLETE;
356 * Pass the asserted acceptor identity to the authentication server.
359 setAcceptorIdentity(OM_uint32 *minor,
364 gss_buffer_desc nameBuf;
365 krb5_context krbContext = NULL;
366 krb5_principal krbPrinc;
367 struct rs_context *rc = ctx->acceptorCtx.radContext;
371 if (ctx->acceptorName == GSS_C_NO_NAME) {
373 return GSS_S_COMPLETE;
376 if ((ctx->acceptorName->flags & NAME_FLAG_SERVICE) == 0) {
377 *minor = GSSEAP_BAD_SERVICE_NAME;
378 return GSS_S_BAD_NAME;
381 GSSEAP_KRB_INIT(&krbContext);
383 krbPrinc = ctx->acceptorName->krbPrincipal;
384 assert(krbPrinc != NULL);
385 assert(KRB_PRINC_LENGTH(krbPrinc) >= 2);
387 /* Acceptor-Service-Name */
388 krbPrincComponentToGssBuffer(krbPrinc, 0, &nameBuf);
390 major = gssEapRadiusAddAvp(minor, vps,
391 PW_GSS_ACCEPTOR_SERVICE_NAME,
394 if (GSS_ERROR(major))
397 /* Acceptor-Host-Name */
398 krbPrincComponentToGssBuffer(krbPrinc, 1, &nameBuf);
400 major = gssEapRadiusAddAvp(minor, vps,
401 PW_GSS_ACCEPTOR_HOST_NAME,
404 if (GSS_ERROR(major))
407 if (KRB_PRINC_LENGTH(krbPrinc) > 2) {
408 /* Acceptor-Service-Specific */
409 krb5_principal_data ssiPrinc = *krbPrinc;
412 KRB_PRINC_LENGTH(&ssiPrinc) -= 2;
413 KRB_PRINC_NAME(&ssiPrinc) += 2;
415 *minor = krb5_unparse_name_flags(krbContext, &ssiPrinc,
416 KRB5_PRINCIPAL_UNPARSE_NO_REALM, &ssi);
418 return GSS_S_FAILURE;
421 nameBuf.length = strlen(ssi);
423 major = gssEapRadiusAddAvp(minor, vps,
424 PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
428 if (GSS_ERROR(major)) {
429 krb5_free_unparsed_name(krbContext, ssi);
432 krb5_free_unparsed_name(krbContext, ssi);
435 krbPrincRealmToGssBuffer(krbPrinc, &nameBuf);
436 if (nameBuf.length != 0) {
437 /* Acceptor-Realm-Name */
438 major = gssEapRadiusAddAvp(minor, vps,
439 PW_GSS_ACCEPTOR_REALM_NAME,
442 if (GSS_ERROR(major))
447 return GSS_S_COMPLETE;
451 * Allocate a RadSec handle
454 createRadiusHandle(OM_uint32 *minor,
458 struct gss_eap_acceptor_ctx *actx = &ctx->acceptorCtx;
459 const char *configFile = RS_CONFIG_FILE;
460 const char *configStanza = "gss-eap";
461 struct rs_alloc_scheme ralloc;
462 struct rs_error *err;
464 assert(actx->radContext == NULL);
465 assert(actx->radConn == NULL);
467 if (rs_context_create(&actx->radContext, RS_DICT_FILE) != 0) {
468 *minor = GSSEAP_RADSEC_CONTEXT_FAILURE;
469 return GSS_S_FAILURE;
472 if (cred->radiusConfigFile != NULL)
473 configFile = cred->radiusConfigFile;
474 if (cred->radiusConfigStanza != NULL)
475 configStanza = cred->radiusConfigStanza;
477 ralloc.calloc = GSSEAP_CALLOC;
478 ralloc.malloc = GSSEAP_MALLOC;
479 ralloc.free = GSSEAP_FREE;
480 ralloc.realloc = GSSEAP_REALLOC;
482 rs_context_set_alloc_scheme(actx->radContext, &ralloc);
484 if (rs_context_read_config(actx->radContext, configFile) != 0) {
485 err = rs_err_ctx_pop(actx->radContext);
489 if (rs_conn_create(actx->radContext, &actx->radConn, configStanza) != 0) {
490 err = rs_err_conn_pop(actx->radConn);
494 if (actx->radServer != NULL) {
495 if (rs_conn_select_peer(actx->radConn, actx->radServer) != 0) {
496 err = rs_err_conn_pop(actx->radConn);
502 return GSS_S_COMPLETE;
505 return gssEapRadiusMapError(minor, err);
509 * Process a EAP response from the initiator.
512 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
515 gss_name_t target GSSEAP_UNUSED,
516 gss_OID mech GSSEAP_UNUSED,
517 OM_uint32 reqFlags GSSEAP_UNUSED,
518 OM_uint32 timeReq GSSEAP_UNUSED,
519 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
520 gss_buffer_t inputToken,
521 gss_buffer_t outputToken,
524 OM_uint32 major, tmpMinor;
525 struct rs_connection *rconn;
526 struct rs_request *request = NULL;
527 struct rs_packet *req = NULL, *resp = NULL;
528 struct radius_packet *frreq, *frresp;
530 if (ctx->acceptorCtx.radContext == NULL) {
531 /* May be NULL from an imported partial context */
532 major = createRadiusHandle(minor, cred, ctx);
533 if (GSS_ERROR(major))
537 if (isIdentityResponseP(inputToken)) {
538 major = importInitiatorIdentity(minor, ctx, inputToken);
539 if (GSS_ERROR(major))
543 rconn = ctx->acceptorCtx.radConn;
545 if (rs_packet_create_authn_request(rconn, &req, NULL, NULL) != 0) {
546 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
549 frreq = rs_packet_frpkt(req);
551 major = setInitiatorIdentity(minor, ctx, &frreq->vps);
552 if (GSS_ERROR(major))
555 major = setAcceptorIdentity(minor, ctx, &frreq->vps);
556 if (GSS_ERROR(major))
559 major = gssEapRadiusAddAvp(minor, &frreq->vps,
560 PW_EAP_MESSAGE, 0, inputToken);
561 if (GSS_ERROR(major))
564 if (ctx->acceptorCtx.state.length != 0) {
565 major = gssEapRadiusAddAvp(minor, &frreq->vps, PW_STATE, 0,
566 &ctx->acceptorCtx.state);
567 if (GSS_ERROR(major))
570 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
573 if (rs_request_create(rconn, &request) != 0) {
574 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
578 rs_request_add_reqpkt(request, req);
581 if (rs_request_send(request, &resp) != 0) {
582 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
586 assert(resp != NULL);
588 frresp = rs_packet_frpkt(resp);
589 switch (frresp->code) {
590 case PW_ACCESS_CHALLENGE:
591 case PW_AUTHENTICATION_ACK:
593 case PW_AUTHENTICATION_REJECT:
594 *minor = GSSEAP_RADIUS_AUTH_FAILURE;
595 major = GSS_S_DEFECTIVE_CREDENTIAL;
599 *minor = GSSEAP_UNKNOWN_RADIUS_CODE;
600 major = GSS_S_FAILURE;
605 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
607 if (major == GSS_S_UNAVAILABLE && frresp->code == PW_ACCESS_CHALLENGE) {
608 *minor = GSSEAP_MISSING_EAP_REQUEST;
609 major = GSS_S_DEFECTIVE_TOKEN;
611 } else if (GSS_ERROR(major))
614 if (frresp->code == PW_ACCESS_CHALLENGE) {
615 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
616 &ctx->acceptorCtx.state, TRUE);
617 if (GSS_ERROR(major) && *minor != GSSEAP_NO_SUCH_ATTR)
620 ctx->acceptorCtx.vps = frresp->vps;
623 major = acceptReadyEap(minor, ctx, cred);
624 if (GSS_ERROR(major))
627 GSSEAP_SM_TRANSITION_NEXT(ctx);
630 major = GSS_S_CONTINUE_NEEDED;
632 *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
636 rs_request_destroy(request);
638 rs_packet_destroy(req);
640 rs_packet_destroy(resp);
641 if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIATOR_EXTS) {
642 assert(major == GSS_S_CONTINUE_NEEDED);
644 rs_conn_destroy(ctx->acceptorCtx.radConn);
645 ctx->acceptorCtx.radConn = NULL;
652 eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
653 gss_cred_id_t cred GSSEAP_UNUSED,
655 gss_name_t target GSSEAP_UNUSED,
656 gss_OID mech GSSEAP_UNUSED,
657 OM_uint32 reqFlags GSSEAP_UNUSED,
658 OM_uint32 timeReq GSSEAP_UNUSED,
659 gss_channel_bindings_t chanBindings,
660 gss_buffer_t inputToken,
661 gss_buffer_t outputToken GSSEAP_UNUSED,
662 OM_uint32 *smFlags GSSEAP_UNUSED)
664 OM_uint32 major, tmpMinor;
665 gss_iov_buffer_desc iov[2];
667 if (ctx->flags & CTX_FLAG_KRB_REAUTH)
668 return GSS_S_CONTINUE_NEEDED;
670 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
671 iov[0].buffer.length = 0;
672 iov[0].buffer.value = NULL;
674 iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
675 iov[1].buffer = *inputToken;
677 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
678 iov, 2, TOK_TYPE_WRAP);
679 if (GSS_ERROR(major))
682 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
683 !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
684 major = GSS_S_BAD_BINDINGS;
685 *minor = GSSEAP_BINDINGS_MISMATCH;
687 major = GSS_S_CONTINUE_NEEDED;
691 gss_release_buffer(&tmpMinor, &iov[0].buffer);
696 #ifdef GSSEAP_ENABLE_REAUTH
698 eapGssSmAcceptReauthCreds(OM_uint32 *minor,
701 gss_name_t target GSSEAP_UNUSED,
702 gss_OID mech GSSEAP_UNUSED,
703 OM_uint32 reqFlags GSSEAP_UNUSED,
704 OM_uint32 timeReq GSSEAP_UNUSED,
705 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
706 gss_buffer_t inputToken GSSEAP_UNUSED,
707 gss_buffer_t outputToken,
708 OM_uint32 *smFlags GSSEAP_UNUSED)
713 * If we're built with fast reauthentication enabled, then
714 * fabricate a ticket from the initiator to ourselves.
716 if (ctx->flags & CTX_FLAG_KRB_REAUTH_SUPPORTED)
717 major = gssEapMakeReauthCreds(minor, ctx, cred, outputToken);
719 major = GSS_S_UNAVAILABLE;
721 if (major == GSS_S_UNAVAILABLE)
722 major = GSS_S_COMPLETE;
724 return GSS_ERROR(major) ? major : GSS_S_CONTINUE_NEEDED;
729 eapGssSmAcceptInitiatorMIC(OM_uint32 *minor,
730 gss_cred_id_t cred GSSEAP_UNUSED,
732 gss_name_t target GSSEAP_UNUSED,
733 gss_OID mech GSSEAP_UNUSED,
734 OM_uint32 reqFlags GSSEAP_UNUSED,
735 OM_uint32 timeReq GSSEAP_UNUSED,
736 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
737 gss_buffer_t inputToken,
738 gss_buffer_t outputToken GSSEAP_UNUSED,
739 OM_uint32 *smFlags GSSEAP_UNUSED)
743 major = gssEapVerifyConversationMIC(minor, ctx, inputToken);
744 if (GSS_ERROR(major))
747 GSSEAP_SM_TRANSITION_NEXT(ctx);
751 return GSS_S_CONTINUE_NEEDED;
755 eapGssSmAcceptAcceptorMIC(OM_uint32 *minor,
756 gss_cred_id_t cred GSSEAP_UNUSED,
758 gss_name_t target GSSEAP_UNUSED,
759 gss_OID mech GSSEAP_UNUSED,
760 OM_uint32 reqFlags GSSEAP_UNUSED,
761 OM_uint32 timeReq GSSEAP_UNUSED,
762 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
763 gss_buffer_t inputToken GSSEAP_UNUSED,
764 gss_buffer_t outputToken,
769 major = gssEapGetConversationMIC(minor, ctx, outputToken);
770 if (GSS_ERROR(major))
773 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
776 *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
778 return GSS_S_COMPLETE;
782 * Acceptor state machine.
784 static struct gss_eap_sm eapGssAcceptorSm[] = {
785 #ifdef GSSEAP_ENABLE_REAUTH
787 ITOK_TYPE_REAUTH_REQ,
788 ITOK_TYPE_REAUTH_RESP,
789 GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
791 eapGssSmAcceptGssReauth,
795 ITOK_TYPE_ACCEPTOR_NAME_REQ,
796 ITOK_TYPE_ACCEPTOR_NAME_RESP,
797 GSSEAP_STATE_INITIAL,
799 eapGssSmAcceptAcceptorName
802 ITOK_TYPE_SUPPORTED_ACCEPTOR_EXTS,
803 ITOK_TYPE_SUPPORTED_INITIATOR_EXTS,
804 GSSEAP_STATE_INITIAL,
810 ITOK_TYPE_VENDOR_INFO,
812 GSSEAP_STATE_INITIAL,
814 eapGssSmAcceptVendorInfo,
820 GSSEAP_STATE_INITIAL,
821 SM_ITOK_FLAG_REQUIRED,
822 eapGssSmAcceptIdentity,
827 GSSEAP_STATE_AUTHENTICATE,
828 SM_ITOK_FLAG_REQUIRED,
829 eapGssSmAcceptAuthenticate
832 ITOK_TYPE_GSS_CHANNEL_BINDINGS,
834 GSSEAP_STATE_INITIATOR_EXTS,
836 eapGssSmAcceptGssChannelBindings,
839 ITOK_TYPE_INITIATOR_MIC,
841 GSSEAP_STATE_INITIATOR_EXTS,
842 SM_ITOK_FLAG_REQUIRED,
843 eapGssSmAcceptInitiatorMIC,
845 #ifdef GSSEAP_ENABLE_REAUTH
848 ITOK_TYPE_REAUTH_CREDS,
849 GSSEAP_STATE_ACCEPTOR_EXTS,
851 eapGssSmAcceptReauthCreds,
856 ITOK_TYPE_ACCEPTOR_MIC,
857 GSSEAP_STATE_ACCEPTOR_EXTS,
859 eapGssSmAcceptAcceptorMIC
864 gss_accept_sec_context(OM_uint32 *minor,
865 gss_ctx_id_t *context_handle,
867 gss_buffer_t input_token,
868 gss_channel_bindings_t input_chan_bindings,
869 gss_name_t *src_name,
871 gss_buffer_t output_token,
872 OM_uint32 *ret_flags,
874 gss_cred_id_t *delegated_cred_handle)
876 OM_uint32 major, tmpMinor;
877 gss_ctx_id_t ctx = *context_handle;
881 output_token->length = 0;
882 output_token->value = NULL;
884 if (src_name != NULL)
885 *src_name = GSS_C_NO_NAME;
887 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
888 *minor = GSSEAP_TOK_TRUNC;
889 return GSS_S_DEFECTIVE_TOKEN;
892 if (ctx == GSS_C_NO_CONTEXT) {
893 major = gssEapAllocContext(minor, &ctx);
894 if (GSS_ERROR(major))
897 *context_handle = ctx;
900 GSSEAP_MUTEX_LOCK(&ctx->mutex);
902 if (cred == GSS_C_NO_CREDENTIAL) {
903 if (ctx->defaultCred == GSS_C_NO_CREDENTIAL) {
904 major = gssEapAcquireCred(minor,
913 if (GSS_ERROR(major))
917 cred = ctx->defaultCred;
920 GSSEAP_MUTEX_LOCK(&cred->mutex);
922 if (cred->name != GSS_C_NO_NAME) {
923 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
924 if (GSS_ERROR(major))
928 major = gssEapSmStep(minor,
939 sizeof(eapGssAcceptorSm) / sizeof(eapGssAcceptorSm[0]));
940 if (GSS_ERROR(major))
943 if (mech_type != NULL) {
944 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
945 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
947 if (ret_flags != NULL)
948 *ret_flags = ctx->gssFlags;
949 if (delegated_cred_handle != NULL)
950 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
952 if (major == GSS_S_COMPLETE) {
953 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
954 major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
955 if (GSS_ERROR(major))
958 if (time_rec != NULL) {
959 major = gssEapContextTime(&tmpMinor, ctx, time_rec);
960 if (GSS_ERROR(major))
965 assert(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
968 if (cred != GSS_C_NO_CREDENTIAL)
969 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
970 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
972 if (GSS_ERROR(major))
973 gssEapReleaseContext(&tmpMinor, context_handle);
978 #ifdef GSSEAP_ENABLE_REAUTH
980 acceptReadyKrb(OM_uint32 *minor,
983 const gss_name_t initiator,
989 major = gssEapGlueToMechName(minor, ctx, initiator, &ctx->initiatorName);
990 if (GSS_ERROR(major))
993 major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
994 if (GSS_ERROR(major))
998 return GSS_S_COMPLETE;
1002 eapGssSmAcceptGssReauth(OM_uint32 *minor,
1005 gss_name_t target GSSEAP_UNUSED,
1007 OM_uint32 reqFlags GSSEAP_UNUSED,
1008 OM_uint32 timeReq GSSEAP_UNUSED,
1009 gss_channel_bindings_t userChanBindings,
1010 gss_buffer_t inputToken,
1011 gss_buffer_t outputToken,
1014 OM_uint32 major, tmpMinor;
1015 gss_name_t krbInitiator = GSS_C_NO_NAME;
1016 OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
1017 struct gss_channel_bindings_struct wireChanBindings = { 0 };
1020 * If we're built with fast reauthentication support, it's valid
1021 * for an initiator to send a GSS reauthentication token as its
1022 * initial context token, causing us to short-circuit the state
1023 * machine and process Kerberos GSS messages instead.
1026 ctx->flags |= CTX_FLAG_KRB_REAUTH;
1029 * To avoid an additional round trip, we use GSS channel bindings
1030 * to integrity protect the rest of the initiator exchange. This
1031 * does have the disadvantage of making it impossible for the
1032 * acceptor to ignore application channel bindings, behaviour
1033 * which differs from normal Kerberos and GSS-EAP itself.
1035 major = gssEapMakeTokenChannelBindings(minor, ctx,
1039 if (GSS_ERROR(major))
1042 major = gssAcceptSecContext(minor,
1053 if (major == GSS_S_COMPLETE) {
1054 major = acceptReadyKrb(minor, ctx, cred,
1055 krbInitiator, mech, timeRec);
1056 if (major == GSS_S_COMPLETE) {
1057 /* Generate acceptor MIC */
1058 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ACCEPTOR_EXTS);
1060 ctx->gssFlags = gssFlags;
1061 } else if (GSS_ERROR(major) &&
1062 (*smFlags & SM_FLAG_INPUT_TOKEN_CRITICAL) == 0) {
1063 /* Fall back to EAP */
1064 gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
1065 ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
1066 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
1068 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
1071 major = GSS_S_CONTINUE_NEEDED;
1073 gssReleaseName(&tmpMinor, &krbInitiator);
1074 gss_release_buffer(&tmpMinor, &wireChanBindings.application_data);
1078 #endif /* GSSEAP_ENABLE_REAUTH */