2 * Copyright (c) 2011, JANET(UK)
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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 && vp->length) {
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))
124 if (ctx->expiryTime != 0 && ctx->expiryTime < time(NULL)) {
125 *minor = GSSEAP_CRED_EXPIRED;
126 return GSS_S_CREDENTIALS_EXPIRED;
130 return GSS_S_COMPLETE;
134 gssEapSupportedInitiatorExts[] = {
137 static struct gss_eap_itok_map
138 gssEapAcceptorExtsFlagMap[] = {
139 { ITOK_TYPE_REAUTH_CREDS, CTX_FLAG_KRB_REAUTH_SUPPORTED },
143 eapGssSmAcceptExts(OM_uint32 *minor,
144 gss_cred_id_t cred GSSEAP_UNUSED,
145 gss_ctx_id_t ctx GSSEAP_UNUSED,
146 gss_name_t target GSSEAP_UNUSED,
147 gss_OID mech GSSEAP_UNUSED,
148 OM_uint32 reqFlags GSSEAP_UNUSED,
149 OM_uint32 timeReq GSSEAP_UNUSED,
150 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
151 gss_buffer_t inputToken,
152 gss_buffer_t outputToken,
153 OM_uint32 *smFlags GSSEAP_UNUSED)
157 major = gssEapProcessSupportedExts(minor, inputToken,
158 gssEapAcceptorExtsFlagMap,
159 sizeof(gssEapAcceptorExtsFlagMap) /
160 sizeof(gssEapAcceptorExtsFlagMap[0]),
162 if (GSS_ERROR(major))
165 major = gssEapEncodeSupportedExts(minor,
166 gssEapSupportedInitiatorExts,
167 sizeof(gssEapSupportedInitiatorExts) /
168 sizeof(gssEapSupportedInitiatorExts[0]),
170 if (GSS_ERROR(major))
173 return GSS_S_CONTINUE_NEEDED;
177 eapGssSmAcceptAcceptorName(OM_uint32 *minor,
178 gss_cred_id_t cred GSSEAP_UNUSED,
180 gss_name_t target GSSEAP_UNUSED,
181 gss_OID mech GSSEAP_UNUSED,
182 OM_uint32 reqFlags GSSEAP_UNUSED,
183 OM_uint32 timeReq GSSEAP_UNUSED,
184 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
185 gss_buffer_t inputToken GSSEAP_UNUSED,
186 gss_buffer_t outputToken,
187 OM_uint32 *smFlags GSSEAP_UNUSED)
191 /* XXX TODO import and validate name from inputToken */
193 if (ctx->acceptorName != GSS_C_NO_NAME) {
194 /* Send desired target name to acceptor */
195 major = gssEapDisplayName(minor, ctx->acceptorName,
197 if (GSS_ERROR(major))
201 return GSS_S_CONTINUE_NEEDED;
206 eapGssSmAcceptVendorInfo(OM_uint32 *minor,
207 gss_cred_id_t cred GSSEAP_UNUSED,
208 gss_ctx_id_t ctx GSSEAP_UNUSED,
209 gss_name_t target GSSEAP_UNUSED,
210 gss_OID mech GSSEAP_UNUSED,
211 OM_uint32 reqFlags GSSEAP_UNUSED,
212 OM_uint32 timeReq GSSEAP_UNUSED,
213 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
214 gss_buffer_t inputToken,
215 gss_buffer_t outputToken GSSEAP_UNUSED,
216 OM_uint32 *smFlags GSSEAP_UNUSED)
218 fprintf(stderr, "GSS-EAP: vendor: %.*s\n",
219 (int)inputToken->length, (char *)inputToken->value);
222 return GSS_S_CONTINUE_NEEDED;
228 * Emit a identity EAP request to force the initiator (peer) to identify
232 eapGssSmAcceptIdentity(OM_uint32 *minor,
235 gss_name_t target GSSEAP_UNUSED,
236 gss_OID mech GSSEAP_UNUSED,
237 OM_uint32 reqFlags GSSEAP_UNUSED,
238 OM_uint32 timeReq GSSEAP_UNUSED,
239 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
240 gss_buffer_t inputToken,
241 gss_buffer_t outputToken,
245 struct wpabuf *reqData;
246 gss_buffer_desc pktBuffer;
248 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
249 *minor = GSSEAP_CRED_MECH_MISMATCH;
250 return GSS_S_BAD_MECH;
253 if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0) {
254 *minor = GSSEAP_WRONG_SIZE;
255 return GSS_S_DEFECTIVE_TOKEN;
258 reqData = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY, 0,
259 EAP_CODE_REQUEST, 0);
260 if (reqData == NULL) {
262 return GSS_S_FAILURE;
265 pktBuffer.length = wpabuf_len(reqData);
266 pktBuffer.value = (void *)wpabuf_head(reqData);
268 major = duplicateBuffer(minor, &pktBuffer, outputToken);
269 if (GSS_ERROR(major))
272 wpabuf_free(reqData);
274 GSSEAP_SM_TRANSITION_NEXT(ctx);
277 *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
279 return GSS_S_CONTINUE_NEEDED;
283 * Returns TRUE if the input token contains an EAP identity response.
286 isIdentityResponseP(gss_buffer_t inputToken)
288 struct wpabuf respData;
290 wpabuf_set(&respData, inputToken->value, inputToken->length);
292 return (eap_get_type(&respData) == EAP_TYPE_IDENTITY);
296 * Save the asserted initiator identity from the EAP identity response.
299 importInitiatorIdentity(OM_uint32 *minor,
301 gss_buffer_t inputToken)
304 struct wpabuf respData;
305 const unsigned char *pos;
307 gss_buffer_desc nameBuf;
309 wpabuf_set(&respData, inputToken->value, inputToken->length);
311 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
314 *minor = GSSEAP_PEER_BAD_MESSAGE;
315 return GSS_S_DEFECTIVE_TOKEN;
318 nameBuf.value = (void *)pos;
319 nameBuf.length = len;
321 gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
323 return gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
324 ctx->mechanismUsed, &ctx->initiatorName);
328 * Pass the asserted initiator identity to the authentication server.
331 setInitiatorIdentity(OM_uint32 *minor,
335 OM_uint32 major, tmpMinor;
336 gss_buffer_desc nameBuf;
339 * We should have got an EAP identity response, but if we didn't, then
340 * we will just avoid sending User-Name. Note that radsecproxy requires
341 * User-Name to be sent on every request (presumably so it can remain
344 if (ctx->initiatorName != GSS_C_NO_NAME) {
345 major = gssEapDisplayName(minor, ctx->initiatorName, &nameBuf, NULL);
346 if (GSS_ERROR(major))
349 major = gssEapRadiusAddAvp(minor, vps, PW_USER_NAME, 0, &nameBuf);
350 if (GSS_ERROR(major))
353 gss_release_buffer(&tmpMinor, &nameBuf);
357 return GSS_S_COMPLETE;
361 * Pass the asserted acceptor identity to the authentication server.
364 setAcceptorIdentity(OM_uint32 *minor,
369 gss_buffer_desc nameBuf;
370 krb5_context krbContext = NULL;
371 krb5_principal krbPrinc;
372 struct rs_context *rc = ctx->acceptorCtx.radContext;
376 if (ctx->acceptorName == GSS_C_NO_NAME) {
378 return GSS_S_COMPLETE;
381 if ((ctx->acceptorName->flags & NAME_FLAG_SERVICE) == 0) {
382 *minor = GSSEAP_BAD_SERVICE_NAME;
383 return GSS_S_BAD_NAME;
386 GSSEAP_KRB_INIT(&krbContext);
388 krbPrinc = ctx->acceptorName->krbPrincipal;
389 assert(krbPrinc != NULL);
390 assert(KRB_PRINC_LENGTH(krbPrinc) >= 2);
392 /* Acceptor-Service-Name */
393 krbPrincComponentToGssBuffer(krbPrinc, 0, &nameBuf);
395 major = gssEapRadiusAddAvp(minor, vps,
396 PW_GSS_ACCEPTOR_SERVICE_NAME,
399 if (GSS_ERROR(major))
402 /* Acceptor-Host-Name */
403 krbPrincComponentToGssBuffer(krbPrinc, 1, &nameBuf);
405 major = gssEapRadiusAddAvp(minor, vps,
406 PW_GSS_ACCEPTOR_HOST_NAME,
409 if (GSS_ERROR(major))
412 if (KRB_PRINC_LENGTH(krbPrinc) > 2) {
413 /* Acceptor-Service-Specific */
414 krb5_principal_data ssiPrinc = *krbPrinc;
417 KRB_PRINC_LENGTH(&ssiPrinc) -= 2;
418 KRB_PRINC_NAME(&ssiPrinc) += 2;
420 *minor = krb5_unparse_name_flags(krbContext, &ssiPrinc,
421 KRB5_PRINCIPAL_UNPARSE_NO_REALM, &ssi);
423 return GSS_S_FAILURE;
426 nameBuf.length = strlen(ssi);
428 major = gssEapRadiusAddAvp(minor, vps,
429 PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
433 if (GSS_ERROR(major)) {
434 krb5_free_unparsed_name(krbContext, ssi);
437 krb5_free_unparsed_name(krbContext, ssi);
440 krbPrincRealmToGssBuffer(krbPrinc, &nameBuf);
441 if (nameBuf.length != 0) {
442 /* Acceptor-Realm-Name */
443 major = gssEapRadiusAddAvp(minor, vps,
444 PW_GSS_ACCEPTOR_REALM_NAME,
447 if (GSS_ERROR(major))
452 return GSS_S_COMPLETE;
456 * Allocate a RadSec handle
459 createRadiusHandle(OM_uint32 *minor,
463 struct gss_eap_acceptor_ctx *actx = &ctx->acceptorCtx;
464 const char *configFile = RS_CONFIG_FILE;
465 const char *configStanza = "gss-eap";
466 struct rs_alloc_scheme ralloc;
467 struct rs_error *err;
469 assert(actx->radContext == NULL);
470 assert(actx->radConn == NULL);
472 if (rs_context_create(&actx->radContext) != 0) {
473 *minor = GSSEAP_RADSEC_CONTEXT_FAILURE;
474 return GSS_S_FAILURE;
477 if (cred->radiusConfigFile != NULL)
478 configFile = cred->radiusConfigFile;
479 if (cred->radiusConfigStanza != NULL)
480 configStanza = cred->radiusConfigStanza;
482 ralloc.calloc = GSSEAP_CALLOC;
483 ralloc.malloc = GSSEAP_MALLOC;
484 ralloc.free = GSSEAP_FREE;
485 ralloc.realloc = GSSEAP_REALLOC;
487 rs_context_set_alloc_scheme(actx->radContext, &ralloc);
489 if (rs_context_read_config(actx->radContext, configFile) != 0) {
490 err = rs_err_ctx_pop(actx->radContext);
494 if (rs_context_init_freeradius_dict(actx->radContext, NULL) != 0) {
495 err = rs_err_ctx_pop(actx->radContext);
499 if (rs_conn_create(actx->radContext, &actx->radConn, configStanza) != 0) {
500 err = rs_err_conn_pop(actx->radConn);
504 if (actx->radServer != NULL) {
505 if (rs_conn_select_peer(actx->radConn, actx->radServer) != 0) {
506 err = rs_err_conn_pop(actx->radConn);
512 return GSS_S_COMPLETE;
515 return gssEapRadiusMapError(minor, err);
519 * Process a EAP response from the initiator.
522 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
525 gss_name_t target GSSEAP_UNUSED,
526 gss_OID mech GSSEAP_UNUSED,
527 OM_uint32 reqFlags GSSEAP_UNUSED,
528 OM_uint32 timeReq GSSEAP_UNUSED,
529 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
530 gss_buffer_t inputToken,
531 gss_buffer_t outputToken,
534 OM_uint32 major, tmpMinor;
535 struct rs_connection *rconn;
536 struct rs_request *request = NULL;
537 struct rs_packet *req = NULL, *resp = NULL;
538 struct radius_packet *frreq, *frresp;
540 if (ctx->acceptorCtx.radContext == NULL) {
541 /* May be NULL from an imported partial context */
542 major = createRadiusHandle(minor, cred, ctx);
543 if (GSS_ERROR(major))
547 if (isIdentityResponseP(inputToken)) {
548 major = importInitiatorIdentity(minor, ctx, inputToken);
549 if (GSS_ERROR(major))
553 rconn = ctx->acceptorCtx.radConn;
555 if (rs_packet_create_authn_request(rconn, &req, NULL, NULL) != 0) {
556 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
559 frreq = rs_packet_frpkt(req);
561 major = setInitiatorIdentity(minor, ctx, &frreq->vps);
562 if (GSS_ERROR(major))
565 major = setAcceptorIdentity(minor, ctx, &frreq->vps);
566 if (GSS_ERROR(major))
569 major = gssEapRadiusAddAvp(minor, &frreq->vps,
570 PW_EAP_MESSAGE, 0, inputToken);
571 if (GSS_ERROR(major))
574 if (ctx->acceptorCtx.state.length != 0) {
575 major = gssEapRadiusAddAvp(minor, &frreq->vps, PW_STATE, 0,
576 &ctx->acceptorCtx.state);
577 if (GSS_ERROR(major))
580 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
583 if (rs_request_create(rconn, &request) != 0) {
584 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
588 rs_request_add_reqpkt(request, req);
591 if (rs_request_send(request, &resp) != 0) {
592 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
596 assert(resp != NULL);
598 frresp = rs_packet_frpkt(resp);
599 switch (frresp->code) {
600 case PW_ACCESS_CHALLENGE:
601 case PW_AUTHENTICATION_ACK:
603 case PW_AUTHENTICATION_REJECT:
604 *minor = GSSEAP_RADIUS_AUTH_FAILURE;
605 major = GSS_S_DEFECTIVE_CREDENTIAL;
609 *minor = GSSEAP_UNKNOWN_RADIUS_CODE;
610 major = GSS_S_FAILURE;
615 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
617 if (major == GSS_S_UNAVAILABLE && frresp->code == PW_ACCESS_CHALLENGE) {
618 *minor = GSSEAP_MISSING_EAP_REQUEST;
619 major = GSS_S_DEFECTIVE_TOKEN;
621 } else if (GSS_ERROR(major))
624 if (frresp->code == PW_ACCESS_CHALLENGE) {
625 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
626 &ctx->acceptorCtx.state, TRUE);
627 if (GSS_ERROR(major) && *minor != GSSEAP_NO_SUCH_ATTR)
630 ctx->acceptorCtx.vps = frresp->vps;
633 major = acceptReadyEap(minor, ctx, cred);
634 if (GSS_ERROR(major))
637 GSSEAP_SM_TRANSITION_NEXT(ctx);
640 major = GSS_S_CONTINUE_NEEDED;
642 *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
646 rs_request_destroy(request);
648 rs_packet_destroy(req);
650 rs_packet_destroy(resp);
651 if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIATOR_EXTS) {
652 assert(major == GSS_S_CONTINUE_NEEDED);
654 rs_conn_destroy(ctx->acceptorCtx.radConn);
655 ctx->acceptorCtx.radConn = NULL;
662 eapGssSmAcceptGssFlags(OM_uint32 *minor,
663 gss_cred_id_t cred GSSEAP_UNUSED,
665 gss_name_t target GSSEAP_UNUSED,
666 gss_OID mech GSSEAP_UNUSED,
667 OM_uint32 reqFlags GSSEAP_UNUSED,
668 OM_uint32 timeReq GSSEAP_UNUSED,
669 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
670 gss_buffer_t inputToken,
671 gss_buffer_t outputToken GSSEAP_UNUSED,
672 OM_uint32 *smFlags GSSEAP_UNUSED)
675 OM_uint32 initiatorGssFlags;
677 assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
679 if (inputToken->length < 4) {
680 *minor = GSSEAP_TOK_TRUNC;
681 return GSS_S_DEFECTIVE_TOKEN;
684 /* allow flags to grow for future expansion */
685 p = (unsigned char *)inputToken->value + inputToken->length - 4;
687 initiatorGssFlags = load_uint32_be(p);
688 initiatorGssFlags &= GSSEAP_WIRE_FLAGS_MASK;
690 ctx->gssFlags |= initiatorGssFlags;
692 return GSS_S_CONTINUE_NEEDED;
696 eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
697 gss_cred_id_t cred GSSEAP_UNUSED,
699 gss_name_t target GSSEAP_UNUSED,
700 gss_OID mech GSSEAP_UNUSED,
701 OM_uint32 reqFlags GSSEAP_UNUSED,
702 OM_uint32 timeReq GSSEAP_UNUSED,
703 gss_channel_bindings_t chanBindings,
704 gss_buffer_t inputToken,
705 gss_buffer_t outputToken GSSEAP_UNUSED,
706 OM_uint32 *smFlags GSSEAP_UNUSED)
708 OM_uint32 major, tmpMinor;
709 gss_iov_buffer_desc iov[2];
711 assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
713 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
714 iov[0].buffer.length = 0;
715 iov[0].buffer.value = NULL;
717 iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
718 iov[1].buffer = *inputToken;
720 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
721 iov, 2, TOK_TYPE_WRAP);
722 if (GSS_ERROR(major))
725 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
726 !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
727 major = GSS_S_BAD_BINDINGS;
728 *minor = GSSEAP_BINDINGS_MISMATCH;
730 major = GSS_S_CONTINUE_NEEDED;
734 gss_release_buffer(&tmpMinor, &iov[0].buffer);
739 #ifdef GSSEAP_ENABLE_REAUTH
741 eapGssSmAcceptReauthCreds(OM_uint32 *minor,
744 gss_name_t target GSSEAP_UNUSED,
745 gss_OID mech GSSEAP_UNUSED,
746 OM_uint32 reqFlags GSSEAP_UNUSED,
747 OM_uint32 timeReq GSSEAP_UNUSED,
748 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
749 gss_buffer_t inputToken GSSEAP_UNUSED,
750 gss_buffer_t outputToken,
751 OM_uint32 *smFlags GSSEAP_UNUSED)
756 * If we're built with fast reauthentication enabled, then
757 * fabricate a ticket from the initiator to ourselves.
759 if (ctx->flags & CTX_FLAG_KRB_REAUTH_SUPPORTED)
760 major = gssEapMakeReauthCreds(minor, ctx, cred, outputToken);
762 major = GSS_S_UNAVAILABLE;
764 if (major == GSS_S_UNAVAILABLE)
765 major = GSS_S_COMPLETE;
767 return GSS_ERROR(major) ? major : GSS_S_CONTINUE_NEEDED;
772 eapGssSmAcceptInitiatorMIC(OM_uint32 *minor,
773 gss_cred_id_t cred GSSEAP_UNUSED,
775 gss_name_t target GSSEAP_UNUSED,
776 gss_OID mech GSSEAP_UNUSED,
777 OM_uint32 reqFlags GSSEAP_UNUSED,
778 OM_uint32 timeReq GSSEAP_UNUSED,
779 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
780 gss_buffer_t inputToken,
781 gss_buffer_t outputToken GSSEAP_UNUSED,
782 OM_uint32 *smFlags GSSEAP_UNUSED)
786 assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
788 major = gssEapVerifyConversationMIC(minor, ctx, inputToken);
789 if (GSS_ERROR(major))
792 GSSEAP_SM_TRANSITION_NEXT(ctx);
796 return GSS_S_CONTINUE_NEEDED;
800 eapGssSmAcceptAcceptorMIC(OM_uint32 *minor,
801 gss_cred_id_t cred GSSEAP_UNUSED,
803 gss_name_t target GSSEAP_UNUSED,
804 gss_OID mech GSSEAP_UNUSED,
805 OM_uint32 reqFlags GSSEAP_UNUSED,
806 OM_uint32 timeReq GSSEAP_UNUSED,
807 gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
808 gss_buffer_t inputToken GSSEAP_UNUSED,
809 gss_buffer_t outputToken,
814 major = gssEapGetConversationMIC(minor, ctx, outputToken);
815 if (GSS_ERROR(major))
818 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
821 *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
823 return GSS_S_COMPLETE;
827 * Acceptor state machine.
829 static struct gss_eap_sm eapGssAcceptorSm[] = {
830 #ifdef GSSEAP_ENABLE_REAUTH
832 ITOK_TYPE_REAUTH_REQ,
833 ITOK_TYPE_REAUTH_RESP,
834 GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
836 eapGssSmAcceptGssReauth,
840 ITOK_TYPE_ACCEPTOR_NAME_REQ,
841 ITOK_TYPE_ACCEPTOR_NAME_RESP,
842 GSSEAP_STATE_INITIAL,
844 eapGssSmAcceptAcceptorName
847 ITOK_TYPE_SUPPORTED_ACCEPTOR_EXTS,
848 ITOK_TYPE_SUPPORTED_INITIATOR_EXTS,
849 GSSEAP_STATE_INITIAL,
855 ITOK_TYPE_VENDOR_INFO,
857 GSSEAP_STATE_INITIAL,
859 eapGssSmAcceptVendorInfo,
865 GSSEAP_STATE_INITIAL,
866 SM_ITOK_FLAG_REQUIRED,
867 eapGssSmAcceptIdentity,
872 GSSEAP_STATE_AUTHENTICATE,
873 SM_ITOK_FLAG_REQUIRED,
874 eapGssSmAcceptAuthenticate
879 GSSEAP_STATE_INITIATOR_EXTS,
881 eapGssSmAcceptGssFlags
884 ITOK_TYPE_GSS_CHANNEL_BINDINGS,
886 GSSEAP_STATE_INITIATOR_EXTS,
888 eapGssSmAcceptGssChannelBindings,
891 ITOK_TYPE_INITIATOR_MIC,
893 GSSEAP_STATE_INITIATOR_EXTS,
894 SM_ITOK_FLAG_REQUIRED,
895 eapGssSmAcceptInitiatorMIC,
897 #ifdef GSSEAP_ENABLE_REAUTH
900 ITOK_TYPE_REAUTH_CREDS,
901 GSSEAP_STATE_ACCEPTOR_EXTS,
903 eapGssSmAcceptReauthCreds,
908 ITOK_TYPE_ACCEPTOR_MIC,
909 GSSEAP_STATE_ACCEPTOR_EXTS,
911 eapGssSmAcceptAcceptorMIC
916 gss_accept_sec_context(OM_uint32 *minor,
917 gss_ctx_id_t *context_handle,
919 gss_buffer_t input_token,
920 gss_channel_bindings_t input_chan_bindings,
921 gss_name_t *src_name,
923 gss_buffer_t output_token,
924 OM_uint32 *ret_flags,
926 gss_cred_id_t *delegated_cred_handle)
928 OM_uint32 major, tmpMinor;
929 gss_ctx_id_t ctx = *context_handle;
933 output_token->length = 0;
934 output_token->value = NULL;
936 if (src_name != NULL)
937 *src_name = GSS_C_NO_NAME;
939 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
940 *minor = GSSEAP_TOK_TRUNC;
941 return GSS_S_DEFECTIVE_TOKEN;
944 if (ctx == GSS_C_NO_CONTEXT) {
945 major = gssEapAllocContext(minor, &ctx);
946 if (GSS_ERROR(major))
949 *context_handle = ctx;
952 GSSEAP_MUTEX_LOCK(&ctx->mutex);
954 if (cred == GSS_C_NO_CREDENTIAL) {
955 if (ctx->defaultCred == GSS_C_NO_CREDENTIAL) {
956 major = gssEapAcquireCred(minor,
965 if (GSS_ERROR(major))
969 cred = ctx->defaultCred;
972 GSSEAP_MUTEX_LOCK(&cred->mutex);
974 if (cred->name != GSS_C_NO_NAME) {
975 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
976 if (GSS_ERROR(major))
980 major = gssEapSmStep(minor,
991 sizeof(eapGssAcceptorSm) / sizeof(eapGssAcceptorSm[0]));
992 if (GSS_ERROR(major))
995 if (mech_type != NULL) {
998 tmpMajor = gssEapCanonicalizeOid(&tmpMinor, ctx->mechanismUsed, 0, mech_type);
999 if (GSS_ERROR(tmpMajor)) {
1005 if (ret_flags != NULL)
1006 *ret_flags = ctx->gssFlags;
1007 if (delegated_cred_handle != NULL)
1008 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1010 if (major == GSS_S_COMPLETE) {
1011 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
1012 major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
1013 if (GSS_ERROR(major))
1016 if (time_rec != NULL) {
1017 major = gssEapContextTime(&tmpMinor, ctx, time_rec);
1018 if (GSS_ERROR(major))
1023 assert(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
1026 if (cred != GSS_C_NO_CREDENTIAL)
1027 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
1028 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
1030 if (GSS_ERROR(major))
1031 gssEapReleaseContext(&tmpMinor, context_handle);
1036 #ifdef GSSEAP_ENABLE_REAUTH
1038 acceptReadyKrb(OM_uint32 *minor,
1041 const gss_name_t initiator,
1047 major = gssEapGlueToMechName(minor, ctx, initiator, &ctx->initiatorName);
1048 if (GSS_ERROR(major))
1051 major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
1052 if (GSS_ERROR(major))
1056 return GSS_S_COMPLETE;
1060 eapGssSmAcceptGssReauth(OM_uint32 *minor,
1063 gss_name_t target GSSEAP_UNUSED,
1065 OM_uint32 reqFlags GSSEAP_UNUSED,
1066 OM_uint32 timeReq GSSEAP_UNUSED,
1067 gss_channel_bindings_t userChanBindings,
1068 gss_buffer_t inputToken,
1069 gss_buffer_t outputToken,
1072 OM_uint32 major, tmpMinor;
1073 gss_name_t krbInitiator = GSS_C_NO_NAME;
1074 OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
1075 struct gss_channel_bindings_struct wireChanBindings = { 0 };
1078 * If we're built with fast reauthentication support, it's valid
1079 * for an initiator to send a GSS reauthentication token as its
1080 * initial context token, causing us to short-circuit the state
1081 * machine and process Kerberos GSS messages instead.
1084 ctx->flags |= CTX_FLAG_KRB_REAUTH;
1087 * To avoid an additional round trip, we use GSS channel bindings
1088 * to integrity protect the rest of the initiator exchange. This
1089 * does have the disadvantage of making it impossible for the
1090 * acceptor to ignore application channel bindings, behaviour
1091 * which differs from normal Kerberos and GSS-EAP itself.
1093 major = gssEapMakeTokenChannelBindings(minor, ctx,
1097 if (GSS_ERROR(major))
1100 major = gssAcceptSecContext(minor,
1111 if (major == GSS_S_COMPLETE) {
1112 major = acceptReadyKrb(minor, ctx, cred,
1113 krbInitiator, mech, timeRec);
1114 if (major == GSS_S_COMPLETE) {
1115 /* Generate acceptor MIC */
1116 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ACCEPTOR_EXTS);
1118 ctx->gssFlags = gssFlags;
1119 } else if (GSS_ERROR(major) &&
1120 (*smFlags & SM_FLAG_INPUT_TOKEN_CRITICAL) == 0) {
1121 /* Fall back to EAP */
1122 gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
1123 ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
1124 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
1126 GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
1129 major = GSS_S_CONTINUE_NEEDED;
1131 gssReleaseName(&tmpMinor, &krbInitiator);
1132 gss_release_buffer(&tmpMinor, &wireChanBindings.application_data);
1136 #endif /* GSSEAP_ENABLE_REAUTH */