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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 major = acceptReadyEap(minor, ctx, cred);
332 if (GSS_ERROR(major))
335 ctx->state = EAP_STATE_EXTENSIONS_REQ;
338 major = GSS_S_CONTINUE_NEEDED;
341 rs_request_destroy(request);
347 acceptGssChannelBindings(OM_uint32 *minor,
350 gss_buffer_t inputToken,
351 gss_channel_bindings_t chanBindings)
353 OM_uint32 major, tmpMinor;
354 gss_iov_buffer_desc iov[2];
356 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
357 iov[0].buffer.length = 0;
358 iov[0].buffer.value = NULL;
360 iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
361 iov[1].buffer = *inputToken;
363 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
364 iov, 2, TOK_TYPE_WRAP);
365 if (GSS_ERROR(major))
368 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
369 !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
370 major = GSS_S_BAD_BINDINGS;
372 major = GSS_S_CONTINUE_NEEDED;
375 gss_release_buffer(&tmpMinor, &iov[0].buffer);
381 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
384 gss_buffer_t inputToken,
385 gss_channel_bindings_t chanBindings,
386 gss_buffer_t outputToken)
390 outputToken->length = 0;
391 outputToken->value = NULL;
393 major = acceptGssChannelBindings(minor, ctx, cred, inputToken,
395 if (GSS_ERROR(major))
398 ctx->state = EAP_STATE_EXTENSIONS_RESP;
400 return GSS_S_CONTINUE_NEEDED;
404 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
407 gss_buffer_t inputToken,
408 gss_channel_bindings_t chanBindings,
409 gss_buffer_t outputToken)
411 OM_uint32 major, tmpMinor;
412 gss_buffer_desc credsToken = GSS_C_EMPTY_BUFFER;
414 #ifdef GSSEAP_ENABLE_REAUTH
416 * If we're built with fast reauthentication enabled, then
417 * fabricate a ticket from the initiator to ourselves.
418 * Otherwise return an empty token.
420 major = gssEapMakeReauthCreds(minor, ctx, cred, &credsToken);
421 if (GSS_ERROR(major))
424 credsToken.value = "";
425 #endif /* GSSEAP_ENABLE_REAUTH */
427 major = duplicateBuffer(minor, &credsToken, outputToken);
428 if (GSS_ERROR(major)) {
429 gss_release_buffer(&tmpMinor, &credsToken);
433 #ifdef GSSEAP_ENABLE_REAUTH
434 gss_release_buffer(&tmpMinor, &credsToken);
437 ctx->state = EAP_STATE_ESTABLISHED;
439 return GSS_S_COMPLETE;
443 eapGssSmAcceptEstablished(OM_uint32 *minor,
446 gss_buffer_t inputToken,
447 gss_channel_bindings_t chanBindings,
448 gss_buffer_t outputToken)
450 /* Called with already established context */
452 return GSS_S_BAD_STATUS;
455 static struct gss_eap_acceptor_sm {
456 enum gss_eap_token_type inputTokenType;
457 enum gss_eap_token_type outputTokenType;
458 OM_uint32 (*processToken)(OM_uint32 *,
462 gss_channel_bindings_t,
464 } eapGssAcceptorSm[] = {
465 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
466 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
467 { TOK_TYPE_EXT_REQ, TOK_TYPE_NONE, eapGssSmAcceptExtensionsReq },
468 { TOK_TYPE_NONE, TOK_TYPE_EXT_RESP, eapGssSmAcceptExtensionsResp },
469 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
470 #ifdef GSSEAP_ENABLE_REAUTH
471 { TOK_TYPE_GSS_REAUTH, TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth },
476 gss_accept_sec_context(OM_uint32 *minor,
477 gss_ctx_id_t *context_handle,
479 gss_buffer_t input_token,
480 gss_channel_bindings_t input_chan_bindings,
481 gss_name_t *src_name,
483 gss_buffer_t output_token,
484 OM_uint32 *ret_flags,
486 gss_cred_id_t *delegated_cred_handle)
489 OM_uint32 tmpMajor, tmpMinor;
490 gss_ctx_id_t ctx = *context_handle;
491 struct gss_eap_acceptor_sm *sm = NULL;
492 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
493 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
494 enum gss_eap_token_type tokType;
495 int initialContextToken = 0;
499 output_token->length = 0;
500 output_token->value = NULL;
502 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
503 return GSS_S_DEFECTIVE_TOKEN;
506 if (ctx == GSS_C_NO_CONTEXT) {
507 major = gssEapAllocContext(minor, &ctx);
508 if (GSS_ERROR(major))
511 initialContextToken = 1;
512 *context_handle = ctx;
515 GSSEAP_MUTEX_LOCK(&ctx->mutex);
517 /* Validate and lock credentials */
518 if (cred != GSS_C_NO_CREDENTIAL) {
519 GSSEAP_MUTEX_LOCK(&cred->mutex);
521 if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
522 major = GSS_S_NO_CRED;
527 sm = &eapGssAcceptorSm[ctx->state];
529 major = gssEapVerifyToken(minor, ctx, input_token,
530 &tokType, &innerInputToken);
531 if (GSS_ERROR(major))
534 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
535 major = GSS_S_BAD_MECH;
539 #ifdef GSSEAP_ENABLE_REAUTH
541 * If we're built with fast reauthentication support, it's valid
542 * for an initiator to send a GSS reauthentication token as its
543 * initial context token, causing us to short-circuit the state
544 * machine and process Kerberos GSS messages instead.
546 if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
547 ctx->state = EAP_STATE_KRB_REAUTH_GSS;
550 if (tokType != sm->inputTokenType) {
551 major = GSS_S_DEFECTIVE_TOKEN;
556 sm = &eapGssAcceptorSm[ctx->state];
558 major = (sm->processToken)(minor,
564 if (GSS_ERROR(major))
566 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
568 if (mech_type != NULL) {
569 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
570 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
572 if (innerOutputToken.value != NULL) {
573 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
574 sm->outputTokenType, output_token);
575 if (GSS_ERROR(tmpMajor)) {
581 if (ret_flags != NULL)
582 *ret_flags = ctx->gssFlags;
583 if (delegated_cred_handle != NULL)
584 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
586 if (major == GSS_S_COMPLETE) {
587 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
588 major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
589 if (GSS_ERROR(major))
592 if (time_rec != NULL)
593 gssEapContextTime(&tmpMinor, ctx, time_rec);
596 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
599 if (cred != GSS_C_NO_CREDENTIAL)
600 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
601 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
603 if (GSS_ERROR(major))
604 gssEapReleaseContext(&tmpMinor, context_handle);
606 gss_release_buffer(&tmpMinor, &innerOutputToken);
611 #ifdef GSSEAP_ENABLE_REAUTH
613 acceptReadyKrb(OM_uint32 *minor,
616 const gss_name_t initiator,
622 major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
623 if (GSS_ERROR(major))
626 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
627 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
628 if (GSS_ERROR(major))
632 major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
633 if (GSS_ERROR(major))
636 ctx->state = EAP_STATE_ESTABLISHED;
638 return GSS_S_COMPLETE;
642 eapGssSmAcceptGssReauth(OM_uint32 *minor,
645 gss_buffer_t inputToken,
646 gss_channel_bindings_t chanBindings,
647 gss_buffer_t outputToken)
649 OM_uint32 major, tmpMinor;
650 gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
651 gss_name_t krbInitiator = GSS_C_NO_NAME;
652 gss_OID mech = GSS_C_NO_OID;
653 OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
655 ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
657 if (cred != GSS_C_NO_CREDENTIAL)
658 krbCred = cred->krbCred;
660 major = gssAcceptSecContext(minor,
671 if (major == GSS_S_COMPLETE) {
672 major = acceptReadyKrb(minor, ctx, cred,
673 krbInitiator, mech, timeRec);
676 ctx->gssFlags = gssFlags;
678 gssReleaseName(&tmpMinor, &krbInitiator);
682 #endif /* GSSEAP_ENABLE_REAUTH */