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33 #include "gssapiP_eap.h"
35 #ifdef GSSEAP_ENABLE_REAUTH
37 eapGssSmAcceptGssReauth(OM_uint32 *minor,
40 gss_buffer_t inputToken,
41 gss_channel_bindings_t chanBindings,
42 gss_buffer_t outputToken);
46 * Mark a context as ready for cryptographic operations
49 acceptReadyEap(OM_uint32 *minor, gss_ctx_id_t ctx, gss_cred_id_t cred)
51 OM_uint32 major, tmpMinor;
53 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
55 /* Cache encryption type derived from selected mechanism OID */
56 major = gssEapOidToEnctype(minor, ctx->mechanismUsed,
57 &ctx->encryptionType);
61 gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
63 major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
64 PW_USER_NAME, 0, &vp);
65 if (major == GSS_S_COMPLETE) {
66 nameBuf.length = vp->length;
67 nameBuf.value = vp->vp_strvalue;
69 ctx->gssFlags |= GSS_C_ANON_FLAG;
72 major = gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
77 major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
78 PW_MS_MPPE_SEND_KEY, VENDORPEC_MS, &vp);
82 major = gssEapDeriveRfc3961Key(minor,
90 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
95 major = sequenceInit(minor,
96 &ctx->seqState, ctx->recvSeq,
97 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
98 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
100 if (GSS_ERROR(major))
103 ctx->initiatorName->attrCtx = gssEapCreateAttrContext(cred, ctx);
105 return GSS_S_COMPLETE;
109 eapGssSmAcceptIdentity(OM_uint32 *minor,
112 gss_buffer_t inputToken,
113 gss_channel_bindings_t chanBindings,
114 gss_buffer_t outputToken)
119 unsigned char data[5];
121 gss_buffer_desc pktBuffer;
123 if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0)
124 return GSS_S_DEFECTIVE_TOKEN;
126 assert(ctx->acceptorName == GSS_C_NO_NAME);
128 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
129 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
130 if (GSS_ERROR(major))
134 pkt.pdu.code = EAP_CODE_REQUEST;
135 pkt.pdu.identifier = 0;
136 pkt.pdu.length = htons(sizeof(pkt.data));
137 pkt.data[4] = EAP_TYPE_IDENTITY;
139 pktBuffer.length = sizeof(pkt.data);
140 pktBuffer.value = pkt.data;
142 major = duplicateBuffer(minor, &pktBuffer, outputToken);
143 if (GSS_ERROR(major))
146 ctx->state = EAP_STATE_AUTHENTICATE;
148 return GSS_S_CONTINUE_NEEDED;
152 setAcceptorIdentity(OM_uint32 *minor,
157 gss_buffer_desc nameBuf;
158 krb5_context krbContext = NULL;
159 krb5_principal krbPrinc;
160 struct rs_handle *rh = ctx->acceptorCtx.radHandle;
164 /* Awaits further specification */
165 if (ctx->acceptorName == GSS_C_NO_NAME)
166 return GSS_S_COMPLETE;
168 GSSEAP_KRB_INIT(&krbContext);
170 krbPrinc = ctx->acceptorName->krbPrincipal;
171 assert(krbPrinc != NULL);
173 if (krb5_princ_size(krbContext, krbPrinc) < 2)
174 return GSS_S_BAD_NAME;
176 /* Acceptor-Service-Name */
177 krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 0), &nameBuf);
179 major = gssEapRadiusAddAvp(minor, vps,
180 PW_GSS_ACCEPTOR_SERVICE_NAME,
183 if (GSS_ERROR(major))
186 /* Acceptor-Host-Name */
187 krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 1), &nameBuf);
189 major = gssEapRadiusAddAvp(minor, vps,
190 PW_GSS_ACCEPTOR_HOST_NAME,
193 if (GSS_ERROR(major))
196 if (krb5_princ_size(krbContext, krbPrinc) > 2) {
197 /* Acceptor-Service-Specific */
198 krb5_principal_data ssiPrinc = *krbPrinc;
201 krb5_princ_size(krbContext, &ssiPrinc) -= 2;
202 krb5_princ_name(krbContext, &ssiPrinc) += 2;
204 *minor = krb5_unparse_name_flags(krbContext, &ssiPrinc,
205 KRB5_PRINCIPAL_UNPARSE_NO_REALM, &ssi);
207 return GSS_S_FAILURE;
210 nameBuf.length = strlen(ssi);
212 major = gssEapRadiusAddAvp(minor, vps,
213 PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
217 if (GSS_ERROR(major)) {
218 krb5_free_unparsed_name(krbContext, ssi);
221 krb5_free_unparsed_name(krbContext, ssi);
224 krbDataToGssBuffer(krb5_princ_realm(krbContext, krbPrinc), &nameBuf);
225 if (nameBuf.length != 0) {
226 /* Acceptor-Realm-Name */
227 major = gssEapRadiusAddAvp(minor, vps,
228 PW_GSS_ACCEPTOR_REALM_NAME,
231 if (GSS_ERROR(major))
235 return GSS_S_COMPLETE;
239 createRadiusHandle(OM_uint32 *minor,
243 struct gss_eap_acceptor_ctx *actx = &ctx->acceptorCtx;
244 const char *configFile = RS_CONFIG_FILE;
245 const char *configStanza = "gss-eap";
246 struct rs_alloc_scheme ralloc;
247 struct rs_error *err;
249 assert(actx->radHandle == NULL);
250 assert(actx->radConn == NULL);
252 if (rs_context_create(&actx->radHandle, RS_DICT_FILE) != 0)
253 return GSS_S_FAILURE;
255 if (cred != GSS_C_NO_CREDENTIAL) {
256 if (cred->radiusConfigFile != NULL)
257 configFile = cred->radiusConfigFile;
258 if (cred->radiusConfigStanza != NULL)
259 configStanza = cred->radiusConfigStanza;
262 ralloc.calloc = GSSEAP_CALLOC;
263 ralloc.malloc = GSSEAP_MALLOC;
264 ralloc.free = GSSEAP_FREE;
265 ralloc.realloc = GSSEAP_REALLOC;
267 rs_context_set_alloc_scheme(actx->radHandle, &ralloc);
269 if (rs_context_read_config(actx->radHandle, configFile) != 0) {
270 err = rs_err_ctx_pop(actx->radHandle);
274 if (rs_conn_create(actx->radHandle, &actx->radConn, configStanza) != 0) {
275 err = rs_err_conn_pop(actx->radConn);
279 /* XXX TODO rs_conn_select_server does not exist yet */
281 if (actx->radServer != NULL) {
282 if (rs_conn_select_server(actx->radConn, actx->radServer) != 0) {
283 err = rs_err_conn_pop(actx->radConn);
290 return GSS_S_COMPLETE;
293 return gssEapRadiusMapError(minor, err);
297 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
300 gss_buffer_t inputToken,
301 gss_channel_bindings_t chanBindings,
302 gss_buffer_t outputToken)
304 OM_uint32 major, tmpMinor;
305 struct rs_handle *rh;
306 struct rs_connection *rconn;
307 struct rs_request *request = NULL;
308 struct rs_packet *req = NULL, *resp = NULL;
309 struct radius_packet *frreq, *frresp;
310 int sendAcceptorIdentity = 0;
312 if (ctx->acceptorCtx.radHandle == NULL) {
313 /* May be NULL from an imported partial context */
314 major = createRadiusHandle(minor, cred, ctx);
315 if (GSS_ERROR(major))
318 sendAcceptorIdentity = 1;
321 rh = ctx->acceptorCtx.radHandle;
322 rconn = ctx->acceptorCtx.radConn;
324 if (rs_packet_create_acc_request(rconn, &req, NULL, NULL) != 0) {
325 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
328 frreq = rs_packet_frpkt(req);
330 if (sendAcceptorIdentity) {
331 major = setAcceptorIdentity(minor, ctx, &frreq->vps);
332 if (GSS_ERROR(major))
336 major = gssEapRadiusAddAvp(minor, &frreq->vps,
337 PW_EAP_MESSAGE, 0, inputToken);
338 if (GSS_ERROR(major))
341 if (ctx->acceptorCtx.state.length != 0) {
342 major = gssEapRadiusAddAvp(minor, &frreq->vps, PW_STATE, 0,
343 &ctx->acceptorCtx.state);
344 if (GSS_ERROR(major))
347 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
350 if (rs_request_create(rconn, &request) != 0 ||
351 rs_request_send(request, req, &resp) != 0) {
352 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
356 assert(resp != NULL);
358 frresp = rs_packet_frpkt(resp);
359 switch (frresp->code) {
360 case PW_AUTHENTICATION_ACK:
361 case PW_ACCESS_CHALLENGE:
362 major = GSS_S_CONTINUE_NEEDED;
364 case PW_AUTHENTICATION_REJECT:
365 major = GSS_S_DEFECTIVE_CREDENTIAL;
369 major = GSS_S_FAILURE;
374 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
376 if ((major == GSS_S_UNAVAILABLE && frresp->code != PW_AUTHENTICATION_ACK) ||
380 if (frresp->code == PW_ACCESS_CHALLENGE) {
381 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
382 &ctx->acceptorCtx.state, TRUE);
383 if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
386 ctx->acceptorCtx.vps = frresp->vps;
389 rs_conn_destroy(ctx->acceptorCtx.radConn);
390 ctx->acceptorCtx.radConn = NULL;
392 major = acceptReadyEap(minor, ctx, cred);
393 if (GSS_ERROR(major))
396 ctx->state = EAP_STATE_EXTENSIONS_REQ;
399 major = GSS_S_CONTINUE_NEEDED;
402 rs_request_destroy(request);
408 acceptGssChannelBindings(OM_uint32 *minor,
411 gss_buffer_t inputToken,
412 gss_channel_bindings_t chanBindings)
414 OM_uint32 major, tmpMinor;
415 gss_iov_buffer_desc iov[2];
417 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
418 iov[0].buffer.length = 0;
419 iov[0].buffer.value = NULL;
421 iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
422 iov[1].buffer = *inputToken;
424 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
425 iov, 2, TOK_TYPE_WRAP);
426 if (GSS_ERROR(major))
429 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
430 !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
431 major = GSS_S_BAD_BINDINGS;
433 major = GSS_S_CONTINUE_NEEDED;
436 gss_release_buffer(&tmpMinor, &iov[0].buffer);
442 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
445 gss_buffer_t inputToken,
446 gss_channel_bindings_t chanBindings,
447 gss_buffer_t outputToken)
451 outputToken->length = 0;
452 outputToken->value = NULL;
454 major = acceptGssChannelBindings(minor, ctx, cred, inputToken,
456 if (GSS_ERROR(major))
459 ctx->state = EAP_STATE_EXTENSIONS_RESP;
461 return GSS_S_CONTINUE_NEEDED;
465 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
468 gss_buffer_t inputToken,
469 gss_channel_bindings_t chanBindings,
470 gss_buffer_t outputToken)
472 OM_uint32 major, tmpMinor;
473 gss_buffer_desc credsToken = GSS_C_EMPTY_BUFFER;
475 #ifdef GSSEAP_ENABLE_REAUTH
477 * If we're built with fast reauthentication enabled, then
478 * fabricate a ticket from the initiator to ourselves.
479 * Otherwise return an empty token.
481 major = gssEapMakeReauthCreds(minor, ctx, cred, &credsToken);
482 if (GSS_ERROR(major))
485 credsToken.value = "";
486 #endif /* GSSEAP_ENABLE_REAUTH */
488 major = duplicateBuffer(minor, &credsToken, outputToken);
489 if (GSS_ERROR(major)) {
490 gss_release_buffer(&tmpMinor, &credsToken);
494 #ifdef GSSEAP_ENABLE_REAUTH
495 gss_release_buffer(&tmpMinor, &credsToken);
498 ctx->state = EAP_STATE_ESTABLISHED;
500 return GSS_S_COMPLETE;
504 eapGssSmAcceptEstablished(OM_uint32 *minor,
507 gss_buffer_t inputToken,
508 gss_channel_bindings_t chanBindings,
509 gss_buffer_t outputToken)
511 /* Called with already established context */
513 return GSS_S_BAD_STATUS;
516 static struct gss_eap_acceptor_sm {
517 enum gss_eap_token_type inputTokenType;
518 enum gss_eap_token_type outputTokenType;
519 OM_uint32 (*processToken)(OM_uint32 *,
523 gss_channel_bindings_t,
525 } eapGssAcceptorSm[] = {
526 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
527 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
528 { TOK_TYPE_EXT_REQ, TOK_TYPE_NONE, eapGssSmAcceptExtensionsReq },
529 { TOK_TYPE_NONE, TOK_TYPE_EXT_RESP, eapGssSmAcceptExtensionsResp },
530 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
531 #ifdef GSSEAP_ENABLE_REAUTH
532 { TOK_TYPE_GSS_REAUTH, TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth },
537 gss_accept_sec_context(OM_uint32 *minor,
538 gss_ctx_id_t *context_handle,
540 gss_buffer_t input_token,
541 gss_channel_bindings_t input_chan_bindings,
542 gss_name_t *src_name,
544 gss_buffer_t output_token,
545 OM_uint32 *ret_flags,
547 gss_cred_id_t *delegated_cred_handle)
550 OM_uint32 tmpMajor, tmpMinor;
551 gss_ctx_id_t ctx = *context_handle;
552 struct gss_eap_acceptor_sm *sm = NULL;
553 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
554 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
555 enum gss_eap_token_type tokType;
556 int initialContextToken = 0;
560 output_token->length = 0;
561 output_token->value = NULL;
563 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
564 return GSS_S_DEFECTIVE_TOKEN;
567 if (ctx == GSS_C_NO_CONTEXT) {
568 major = gssEapAllocContext(minor, &ctx);
569 if (GSS_ERROR(major))
572 initialContextToken = 1;
573 *context_handle = ctx;
576 GSSEAP_MUTEX_LOCK(&ctx->mutex);
578 /* Validate and lock credentials */
579 if (cred != GSS_C_NO_CREDENTIAL) {
580 GSSEAP_MUTEX_LOCK(&cred->mutex);
582 if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
583 major = GSS_S_NO_CRED;
588 sm = &eapGssAcceptorSm[ctx->state];
590 major = gssEapVerifyToken(minor, ctx, input_token,
591 &tokType, &innerInputToken);
592 if (GSS_ERROR(major))
595 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
596 major = GSS_S_BAD_MECH;
600 #ifdef GSSEAP_ENABLE_REAUTH
602 * If we're built with fast reauthentication support, it's valid
603 * for an initiator to send a GSS reauthentication token as its
604 * initial context token, causing us to short-circuit the state
605 * machine and process Kerberos GSS messages instead.
607 if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
608 ctx->state = EAP_STATE_KRB_REAUTH_GSS;
611 if (tokType != sm->inputTokenType) {
612 major = GSS_S_DEFECTIVE_TOKEN;
617 sm = &eapGssAcceptorSm[ctx->state];
619 major = (sm->processToken)(minor,
625 if (GSS_ERROR(major))
627 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
629 if (mech_type != NULL) {
630 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
631 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
633 if (innerOutputToken.value != NULL) {
634 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
635 sm->outputTokenType, output_token);
636 if (GSS_ERROR(tmpMajor)) {
642 if (ret_flags != NULL)
643 *ret_flags = ctx->gssFlags;
644 if (delegated_cred_handle != NULL)
645 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
647 if (major == GSS_S_COMPLETE) {
648 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
649 major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
650 if (GSS_ERROR(major))
653 if (time_rec != NULL)
654 gssEapContextTime(&tmpMinor, ctx, time_rec);
657 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
660 if (cred != GSS_C_NO_CREDENTIAL)
661 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
662 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
664 if (GSS_ERROR(major))
665 gssEapReleaseContext(&tmpMinor, context_handle);
667 gss_release_buffer(&tmpMinor, &innerOutputToken);
672 #ifdef GSSEAP_ENABLE_REAUTH
674 acceptReadyKrb(OM_uint32 *minor,
677 const gss_name_t initiator,
683 major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
684 if (GSS_ERROR(major))
687 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
688 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
689 if (GSS_ERROR(major))
693 major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
694 if (GSS_ERROR(major))
697 ctx->state = EAP_STATE_ESTABLISHED;
699 return GSS_S_COMPLETE;
703 eapGssSmAcceptGssReauth(OM_uint32 *minor,
706 gss_buffer_t inputToken,
707 gss_channel_bindings_t chanBindings,
708 gss_buffer_t outputToken)
710 OM_uint32 major, tmpMinor;
711 gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
712 gss_name_t krbInitiator = GSS_C_NO_NAME;
713 gss_OID mech = GSS_C_NO_OID;
714 OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
716 ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
718 if (cred != GSS_C_NO_CREDENTIAL)
719 krbCred = cred->krbCred;
721 major = gssAcceptSecContext(minor,
732 if (major == GSS_S_COMPLETE) {
733 major = acceptReadyKrb(minor, ctx, cred,
734 krbInitiator, mech, timeRec);
737 ctx->gssFlags = gssFlags;
739 gssReleaseName(&tmpMinor, &krbInitiator);
743 #endif /* GSSEAP_ENABLE_REAUTH */