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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 ctx->initiatorName->attrCtx = gssEapCreateAttrContext(cred, ctx);
79 major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
80 PW_MS_MPPE_SEND_KEY, VENDORPEC_MS, &vp);
84 major = gssEapDeriveRfc3961Key(minor,
92 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
97 major = sequenceInit(minor,
98 &ctx->seqState, ctx->recvSeq,
99 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
100 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
102 if (GSS_ERROR(major))
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, rh, 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, rh, 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, rh, 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, rh, vps,
228 PW_GSS_ACCEPTOR_REALM_NAME,
231 if (GSS_ERROR(major))
235 return GSS_S_COMPLETE;
239 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
242 gss_buffer_t inputToken,
243 gss_channel_bindings_t chanBindings,
244 gss_buffer_t outputToken)
246 OM_uint32 major, tmpMinor;
247 struct rs_handle *rh;
248 struct rs_connection *rconn;
249 struct rs_request *request = NULL;
250 struct rs_packet *req = NULL, *resp = NULL;
251 struct radius_packet *frreq, *frresp;
252 int sendAcceptorIdentity = 0;
254 if (ctx->acceptorCtx.radHandle == NULL) {
255 /* May be NULL from an imported partial context */
256 major = gssEapRadiusAllocConn(minor, cred, ctx);
257 if (GSS_ERROR(major))
260 sendAcceptorIdentity = 1;
263 rh = ctx->acceptorCtx.radHandle;
264 rconn = ctx->acceptorCtx.radConn;
266 if (rs_packet_create_acc_request(rconn, &req, NULL, NULL) != 0) {
267 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
270 frreq = rs_packet_frpkt(req);
272 if (sendAcceptorIdentity) {
273 major = setAcceptorIdentity(minor, ctx, &frreq->vps);
274 if (GSS_ERROR(major))
278 major = gssEapRadiusAddAvp(minor, rh, &frreq->vps,
279 PW_EAP_MESSAGE, 0, inputToken);
280 if (GSS_ERROR(major))
283 if (ctx->acceptorCtx.state.length != 0) {
284 major = gssEapRadiusAddAvp(minor, rh, &frreq->vps, PW_STATE, 0,
285 &ctx->acceptorCtx.state);
286 if (GSS_ERROR(major))
289 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
292 if (rs_request_create(rconn, &request) != 0 ||
293 rs_request_send(request, req, &resp) != 0) {
294 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
298 assert(resp != NULL);
300 frresp = rs_packet_frpkt(resp);
301 switch (frresp->code) {
302 case PW_AUTHENTICATION_ACK:
303 case PW_ACCESS_CHALLENGE:
304 major = GSS_S_CONTINUE_NEEDED;
306 case PW_AUTHENTICATION_REJECT:
307 major = GSS_S_DEFECTIVE_CREDENTIAL;
311 major = GSS_S_FAILURE;
316 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
318 if ((major == GSS_S_UNAVAILABLE && frresp->code != PW_AUTHENTICATION_ACK) ||
322 if (frresp->code == PW_ACCESS_CHALLENGE) {
323 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
324 &ctx->acceptorCtx.state, TRUE);
325 if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
328 ctx->acceptorCtx.vps = frresp->vps;
331 rs_conn_destroy(ctx->acceptorCtx.radConn);
332 ctx->acceptorCtx.radConn = NULL;
334 major = acceptReadyEap(minor, ctx, cred);
335 if (GSS_ERROR(major))
338 ctx->state = EAP_STATE_EXTENSIONS_REQ;
341 major = GSS_S_CONTINUE_NEEDED;
344 rs_request_destroy(request);
350 acceptGssChannelBindings(OM_uint32 *minor,
353 gss_buffer_t inputToken,
354 gss_channel_bindings_t chanBindings)
356 OM_uint32 major, tmpMinor;
357 gss_iov_buffer_desc iov[2];
359 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
360 iov[0].buffer.length = 0;
361 iov[0].buffer.value = NULL;
363 iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
364 iov[1].buffer = *inputToken;
366 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
367 iov, 2, TOK_TYPE_WRAP);
368 if (GSS_ERROR(major))
371 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
372 !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
373 major = GSS_S_BAD_BINDINGS;
375 major = GSS_S_CONTINUE_NEEDED;
378 gss_release_buffer(&tmpMinor, &iov[0].buffer);
384 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
387 gss_buffer_t inputToken,
388 gss_channel_bindings_t chanBindings,
389 gss_buffer_t outputToken)
393 outputToken->length = 0;
394 outputToken->value = NULL;
396 major = acceptGssChannelBindings(minor, ctx, cred, inputToken,
398 if (GSS_ERROR(major))
401 ctx->state = EAP_STATE_EXTENSIONS_RESP;
403 return GSS_S_CONTINUE_NEEDED;
407 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
410 gss_buffer_t inputToken,
411 gss_channel_bindings_t chanBindings,
412 gss_buffer_t outputToken)
414 OM_uint32 major, tmpMinor;
415 gss_buffer_desc credsToken = GSS_C_EMPTY_BUFFER;
417 #ifdef GSSEAP_ENABLE_REAUTH
419 * If we're built with fast reauthentication enabled, then
420 * fabricate a ticket from the initiator to ourselves.
421 * Otherwise return an empty token.
423 major = gssEapMakeReauthCreds(minor, ctx, cred, &credsToken);
424 if (GSS_ERROR(major))
427 credsToken.value = "";
428 #endif /* GSSEAP_ENABLE_REAUTH */
430 major = duplicateBuffer(minor, &credsToken, outputToken);
431 if (GSS_ERROR(major)) {
432 gss_release_buffer(&tmpMinor, &credsToken);
436 #ifdef GSSEAP_ENABLE_REAUTH
437 gss_release_buffer(&tmpMinor, &credsToken);
440 ctx->state = EAP_STATE_ESTABLISHED;
442 return GSS_S_COMPLETE;
446 eapGssSmAcceptEstablished(OM_uint32 *minor,
449 gss_buffer_t inputToken,
450 gss_channel_bindings_t chanBindings,
451 gss_buffer_t outputToken)
453 /* Called with already established context */
455 return GSS_S_BAD_STATUS;
458 static struct gss_eap_acceptor_sm {
459 enum gss_eap_token_type inputTokenType;
460 enum gss_eap_token_type outputTokenType;
461 OM_uint32 (*processToken)(OM_uint32 *,
465 gss_channel_bindings_t,
467 } eapGssAcceptorSm[] = {
468 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
469 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
470 { TOK_TYPE_EXT_REQ, TOK_TYPE_NONE, eapGssSmAcceptExtensionsReq },
471 { TOK_TYPE_NONE, TOK_TYPE_EXT_RESP, eapGssSmAcceptExtensionsResp },
472 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
473 #ifdef GSSEAP_ENABLE_REAUTH
474 { TOK_TYPE_GSS_REAUTH, TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth },
479 gss_accept_sec_context(OM_uint32 *minor,
480 gss_ctx_id_t *context_handle,
482 gss_buffer_t input_token,
483 gss_channel_bindings_t input_chan_bindings,
484 gss_name_t *src_name,
486 gss_buffer_t output_token,
487 OM_uint32 *ret_flags,
489 gss_cred_id_t *delegated_cred_handle)
492 OM_uint32 tmpMajor, tmpMinor;
493 gss_ctx_id_t ctx = *context_handle;
494 struct gss_eap_acceptor_sm *sm = NULL;
495 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
496 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
497 enum gss_eap_token_type tokType;
498 int initialContextToken = 0;
502 output_token->length = 0;
503 output_token->value = NULL;
505 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
506 return GSS_S_DEFECTIVE_TOKEN;
509 if (ctx == GSS_C_NO_CONTEXT) {
510 major = gssEapAllocContext(minor, &ctx);
511 if (GSS_ERROR(major))
514 initialContextToken = 1;
515 *context_handle = ctx;
518 GSSEAP_MUTEX_LOCK(&ctx->mutex);
520 /* Validate and lock credentials */
521 if (cred != GSS_C_NO_CREDENTIAL) {
522 GSSEAP_MUTEX_LOCK(&cred->mutex);
524 if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
525 major = GSS_S_NO_CRED;
530 sm = &eapGssAcceptorSm[ctx->state];
532 major = gssEapVerifyToken(minor, ctx, input_token,
533 &tokType, &innerInputToken);
534 if (GSS_ERROR(major))
537 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
538 major = GSS_S_BAD_MECH;
542 #ifdef GSSEAP_ENABLE_REAUTH
544 * If we're built with fast reauthentication support, it's valid
545 * for an initiator to send a GSS reauthentication token as its
546 * initial context token, causing us to short-circuit the state
547 * machine and process Kerberos GSS messages instead.
549 if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
550 ctx->state = EAP_STATE_KRB_REAUTH_GSS;
553 if (tokType != sm->inputTokenType) {
554 major = GSS_S_DEFECTIVE_TOKEN;
559 sm = &eapGssAcceptorSm[ctx->state];
561 major = (sm->processToken)(minor,
567 if (GSS_ERROR(major))
569 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
571 if (mech_type != NULL) {
572 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
573 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
575 if (innerOutputToken.value != NULL) {
576 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
577 sm->outputTokenType, output_token);
578 if (GSS_ERROR(tmpMajor)) {
584 if (ret_flags != NULL)
585 *ret_flags = ctx->gssFlags;
586 if (delegated_cred_handle != NULL)
587 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
589 if (major == GSS_S_COMPLETE) {
590 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
591 major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
592 if (GSS_ERROR(major))
595 if (time_rec != NULL)
596 gssEapContextTime(&tmpMinor, ctx, time_rec);
599 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
602 if (cred != GSS_C_NO_CREDENTIAL)
603 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
604 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
606 if (GSS_ERROR(major))
607 gssEapReleaseContext(&tmpMinor, context_handle);
609 gss_release_buffer(&tmpMinor, &innerOutputToken);
614 #ifdef GSSEAP_ENABLE_REAUTH
616 acceptReadyKrb(OM_uint32 *minor,
619 const gss_name_t initiator,
625 major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
626 if (GSS_ERROR(major))
629 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
630 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
631 if (GSS_ERROR(major))
635 major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
636 if (GSS_ERROR(major))
639 ctx->state = EAP_STATE_ESTABLISHED;
641 return GSS_S_COMPLETE;
645 eapGssSmAcceptGssReauth(OM_uint32 *minor,
648 gss_buffer_t inputToken,
649 gss_channel_bindings_t chanBindings,
650 gss_buffer_t outputToken)
652 OM_uint32 major, tmpMinor;
653 gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
654 gss_name_t krbInitiator = GSS_C_NO_NAME;
655 gss_OID mech = GSS_C_NO_OID;
656 OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
658 ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
660 if (cred != GSS_C_NO_CREDENTIAL)
661 krbCred = cred->krbCred;
663 major = gssAcceptSecContext(minor,
674 if (major == GSS_S_COMPLETE) {
675 major = acceptReadyKrb(minor, ctx, cred,
676 krbInitiator, mech, timeRec);
679 ctx->gssFlags = gssFlags;
681 gssReleaseName(&tmpMinor, &krbInitiator);
685 #endif /* GSSEAP_ENABLE_REAUTH */