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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);
79 if (GSS_ERROR(major)) {
80 *minor = GSSEAP_KEY_UNAVAILABLE;
81 return GSS_S_UNAVAILABLE;
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 ctx->initiatorName->attrCtx = gssEapCreateAttrContext(cred, ctx);
107 return GSS_S_COMPLETE;
111 eapGssSmAcceptIdentity(OM_uint32 *minor,
114 gss_buffer_t inputToken,
115 gss_channel_bindings_t chanBindings,
116 gss_buffer_t outputToken)
121 unsigned char data[5];
123 gss_buffer_desc pktBuffer;
125 if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0)
126 return GSS_S_DEFECTIVE_TOKEN;
128 assert(ctx->acceptorName == GSS_C_NO_NAME);
130 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
131 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
132 if (GSS_ERROR(major))
136 pkt.pdu.code = EAP_CODE_REQUEST;
137 pkt.pdu.identifier = 0;
138 pkt.pdu.length = htons(sizeof(pkt.data));
139 pkt.data[4] = EAP_TYPE_IDENTITY;
141 pktBuffer.length = sizeof(pkt.data);
142 pktBuffer.value = pkt.data;
144 major = duplicateBuffer(minor, &pktBuffer, outputToken);
145 if (GSS_ERROR(major))
148 ctx->state = EAP_STATE_AUTHENTICATE;
150 return GSS_S_CONTINUE_NEEDED;
154 setAcceptorIdentity(OM_uint32 *minor,
159 gss_buffer_desc nameBuf;
160 krb5_context krbContext = NULL;
161 krb5_principal krbPrinc;
162 struct rs_handle *rh = ctx->acceptorCtx.radHandle;
166 /* Awaits further specification */
167 if (ctx->acceptorName == GSS_C_NO_NAME)
168 return GSS_S_COMPLETE;
170 GSSEAP_KRB_INIT(&krbContext);
172 krbPrinc = ctx->acceptorName->krbPrincipal;
173 assert(krbPrinc != NULL);
175 if (krb5_princ_size(krbContext, krbPrinc) < 2)
176 return GSS_S_BAD_NAME;
178 /* Acceptor-Service-Name */
179 krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 0), &nameBuf);
181 major = gssEapRadiusAddAvp(minor, vps,
182 PW_GSS_ACCEPTOR_SERVICE_NAME,
185 if (GSS_ERROR(major))
188 /* Acceptor-Host-Name */
189 krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 1), &nameBuf);
191 major = gssEapRadiusAddAvp(minor, vps,
192 PW_GSS_ACCEPTOR_HOST_NAME,
195 if (GSS_ERROR(major))
198 if (krb5_princ_size(krbContext, krbPrinc) > 2) {
199 /* Acceptor-Service-Specific */
200 krb5_principal_data ssiPrinc = *krbPrinc;
203 krb5_princ_size(krbContext, &ssiPrinc) -= 2;
204 krb5_princ_name(krbContext, &ssiPrinc) += 2;
206 *minor = krb5_unparse_name_flags(krbContext, &ssiPrinc,
207 KRB5_PRINCIPAL_UNPARSE_NO_REALM, &ssi);
209 return GSS_S_FAILURE;
212 nameBuf.length = strlen(ssi);
214 major = gssEapRadiusAddAvp(minor, vps,
215 PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
219 if (GSS_ERROR(major)) {
220 krb5_free_unparsed_name(krbContext, ssi);
223 krb5_free_unparsed_name(krbContext, ssi);
226 krbDataToGssBuffer(krb5_princ_realm(krbContext, krbPrinc), &nameBuf);
227 if (nameBuf.length != 0) {
228 /* Acceptor-Realm-Name */
229 major = gssEapRadiusAddAvp(minor, vps,
230 PW_GSS_ACCEPTOR_REALM_NAME,
233 if (GSS_ERROR(major))
237 return GSS_S_COMPLETE;
241 createRadiusHandle(OM_uint32 *minor,
245 struct gss_eap_acceptor_ctx *actx = &ctx->acceptorCtx;
246 const char *configFile = RS_CONFIG_FILE;
247 const char *configStanza = "gss-eap";
248 struct rs_alloc_scheme ralloc;
249 struct rs_error *err;
251 assert(actx->radHandle == NULL);
252 assert(actx->radConn == NULL);
254 if (rs_context_create(&actx->radHandle, RS_DICT_FILE) != 0) {
255 *minor = GSSEAP_RADSEC_INIT_FAILURE;
256 return GSS_S_FAILURE;
259 if (cred != GSS_C_NO_CREDENTIAL) {
260 if (cred->radiusConfigFile != NULL)
261 configFile = cred->radiusConfigFile;
262 if (cred->radiusConfigStanza != NULL)
263 configStanza = cred->radiusConfigStanza;
266 ralloc.calloc = GSSEAP_CALLOC;
267 ralloc.malloc = GSSEAP_MALLOC;
268 ralloc.free = GSSEAP_FREE;
269 ralloc.realloc = GSSEAP_REALLOC;
271 rs_context_set_alloc_scheme(actx->radHandle, &ralloc);
273 if (rs_context_read_config(actx->radHandle, configFile) != 0) {
274 err = rs_err_ctx_pop(actx->radHandle);
278 if (rs_conn_create(actx->radHandle, &actx->radConn, configStanza) != 0) {
279 err = rs_err_conn_pop(actx->radConn);
283 /* XXX TODO rs_conn_select_server does not exist yet */
285 if (actx->radServer != NULL) {
286 if (rs_conn_select_server(actx->radConn, actx->radServer) != 0) {
287 err = rs_err_conn_pop(actx->radConn);
294 return GSS_S_COMPLETE;
297 return gssEapRadiusMapError(minor, err);
301 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
304 gss_buffer_t inputToken,
305 gss_channel_bindings_t chanBindings,
306 gss_buffer_t outputToken)
308 OM_uint32 major, tmpMinor;
309 struct rs_handle *rh;
310 struct rs_connection *rconn;
311 struct rs_request *request = NULL;
312 struct rs_packet *req = NULL, *resp = NULL;
313 struct radius_packet *frreq, *frresp;
314 int sendAcceptorIdentity = 0;
316 if (ctx->acceptorCtx.radHandle == NULL) {
317 /* May be NULL from an imported partial context */
318 major = createRadiusHandle(minor, cred, ctx);
319 if (GSS_ERROR(major))
322 sendAcceptorIdentity = 1;
325 rh = ctx->acceptorCtx.radHandle;
326 rconn = ctx->acceptorCtx.radConn;
328 if (rs_packet_create_acc_request(rconn, &req, NULL, NULL) != 0) {
329 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
332 frreq = rs_packet_frpkt(req);
334 if (sendAcceptorIdentity) {
335 major = setAcceptorIdentity(minor, ctx, &frreq->vps);
336 if (GSS_ERROR(major))
340 major = gssEapRadiusAddAvp(minor, &frreq->vps,
341 PW_EAP_MESSAGE, 0, inputToken);
342 if (GSS_ERROR(major))
345 if (ctx->acceptorCtx.state.length != 0) {
346 major = gssEapRadiusAddAvp(minor, &frreq->vps, PW_STATE, 0,
347 &ctx->acceptorCtx.state);
348 if (GSS_ERROR(major))
351 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
354 if (rs_request_create(rconn, &request) != 0 ||
355 rs_request_send(request, req, &resp) != 0) {
356 major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
360 assert(resp != NULL);
362 frresp = rs_packet_frpkt(resp);
363 switch (frresp->code) {
364 case PW_AUTHENTICATION_ACK:
365 case PW_ACCESS_CHALLENGE:
366 major = GSS_S_CONTINUE_NEEDED;
368 case PW_AUTHENTICATION_REJECT:
369 *minor = GSSEAP_PEER_AUTH_FAILURE;
370 major = GSS_S_DEFECTIVE_CREDENTIAL;
374 major = GSS_S_FAILURE;
379 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
381 if ((major == GSS_S_UNAVAILABLE && frresp->code != PW_AUTHENTICATION_ACK) ||
385 if (frresp->code == PW_ACCESS_CHALLENGE) {
386 major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
387 &ctx->acceptorCtx.state, TRUE);
388 if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
391 ctx->acceptorCtx.vps = frresp->vps;
394 rs_conn_destroy(ctx->acceptorCtx.radConn);
395 ctx->acceptorCtx.radConn = NULL;
397 major = acceptReadyEap(minor, ctx, cred);
398 if (GSS_ERROR(major))
401 ctx->state = EAP_STATE_EXTENSIONS_REQ;
404 major = GSS_S_CONTINUE_NEEDED;
407 rs_request_destroy(request);
413 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
416 gss_buffer_t inputToken,
417 gss_channel_bindings_t chanBindings,
418 gss_buffer_t outputToken)
422 major = gssEapVerifyExtensions(minor, cred, ctx, chanBindings, inputToken);
423 if (GSS_ERROR(major))
426 outputToken->length = 0;
427 outputToken->value = NULL;
429 ctx->state = EAP_STATE_EXTENSIONS_RESP;
431 return GSS_S_CONTINUE_NEEDED;
435 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
438 gss_buffer_t inputToken,
439 gss_channel_bindings_t chanBindings,
440 gss_buffer_t outputToken)
444 major = gssEapMakeExtensions(minor, cred, ctx, chanBindings, outputToken);
445 if (GSS_ERROR(major))
448 ctx->state = EAP_STATE_ESTABLISHED;
450 return GSS_S_COMPLETE;
454 eapGssSmAcceptEstablished(OM_uint32 *minor,
457 gss_buffer_t inputToken,
458 gss_channel_bindings_t chanBindings,
459 gss_buffer_t outputToken)
461 /* Called with already established context */
462 *minor = GSSEAP_CONTEXT_ESTABLISHED;
463 return GSS_S_BAD_STATUS;
466 static struct gss_eap_acceptor_sm {
467 enum gss_eap_token_type inputTokenType;
468 enum gss_eap_token_type outputTokenType;
469 OM_uint32 (*processToken)(OM_uint32 *,
473 gss_channel_bindings_t,
475 } eapGssAcceptorSm[] = {
476 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
477 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
478 { TOK_TYPE_EXT_REQ, TOK_TYPE_NONE, eapGssSmAcceptExtensionsReq },
479 { TOK_TYPE_NONE, TOK_TYPE_EXT_RESP, eapGssSmAcceptExtensionsResp },
480 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
481 #ifdef GSSEAP_ENABLE_REAUTH
482 { TOK_TYPE_GSS_REAUTH, TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth },
487 gss_accept_sec_context(OM_uint32 *minor,
488 gss_ctx_id_t *context_handle,
490 gss_buffer_t input_token,
491 gss_channel_bindings_t input_chan_bindings,
492 gss_name_t *src_name,
494 gss_buffer_t output_token,
495 OM_uint32 *ret_flags,
497 gss_cred_id_t *delegated_cred_handle)
500 OM_uint32 tmpMajor, tmpMinor;
501 gss_ctx_id_t ctx = *context_handle;
502 struct gss_eap_acceptor_sm *sm = NULL;
503 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
504 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
505 enum gss_eap_token_type tokType;
506 int initialContextToken = 0;
510 output_token->length = 0;
511 output_token->value = NULL;
513 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
514 return GSS_S_DEFECTIVE_TOKEN;
517 if (ctx == GSS_C_NO_CONTEXT) {
518 major = gssEapAllocContext(minor, &ctx);
519 if (GSS_ERROR(major))
522 initialContextToken = 1;
523 *context_handle = ctx;
526 GSSEAP_MUTEX_LOCK(&ctx->mutex);
528 /* Validate and lock credentials */
529 if (cred != GSS_C_NO_CREDENTIAL) {
530 GSSEAP_MUTEX_LOCK(&cred->mutex);
532 if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
533 *minor = GSSEAP_CRED_USAGE_MISMATCH;
534 major = GSS_S_NO_CRED;
539 sm = &eapGssAcceptorSm[ctx->state];
541 major = gssEapVerifyToken(minor, ctx, input_token,
542 &tokType, &innerInputToken);
543 if (GSS_ERROR(major))
546 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
547 *minor = GSSEAP_WRONG_MECH;
548 major = GSS_S_BAD_MECH;
552 #ifdef GSSEAP_ENABLE_REAUTH
554 * If we're built with fast reauthentication support, it's valid
555 * for an initiator to send a GSS reauthentication token as its
556 * initial context token, causing us to short-circuit the state
557 * machine and process Kerberos GSS messages instead.
559 if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
560 ctx->state = EAP_STATE_KRB_REAUTH_GSS;
563 if (tokType != sm->inputTokenType) {
564 *minor = GSSEAP_WRONG_TOK_ID;
565 major = GSS_S_DEFECTIVE_TOKEN;
570 sm = &eapGssAcceptorSm[ctx->state];
572 major = (sm->processToken)(minor,
578 if (GSS_ERROR(major))
580 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
582 if (mech_type != NULL) {
583 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
584 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
586 if (innerOutputToken.value != NULL) {
587 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
588 sm->outputTokenType, output_token);
589 if (GSS_ERROR(tmpMajor)) {
595 if (ret_flags != NULL)
596 *ret_flags = ctx->gssFlags;
597 if (delegated_cred_handle != NULL)
598 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
600 if (major == GSS_S_COMPLETE) {
601 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
602 major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
603 if (GSS_ERROR(major))
606 if (time_rec != NULL)
607 gssEapContextTime(&tmpMinor, ctx, time_rec);
610 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
613 if (cred != GSS_C_NO_CREDENTIAL)
614 GSSEAP_MUTEX_UNLOCK(&cred->mutex);
615 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
617 if (GSS_ERROR(major))
618 gssEapReleaseContext(&tmpMinor, context_handle);
620 gss_release_buffer(&tmpMinor, &innerOutputToken);
625 #ifdef GSSEAP_ENABLE_REAUTH
627 acceptReadyKrb(OM_uint32 *minor,
630 const gss_name_t initiator,
636 major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
637 if (GSS_ERROR(major))
640 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
641 major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
642 if (GSS_ERROR(major))
646 major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
647 if (GSS_ERROR(major))
650 ctx->state = EAP_STATE_ESTABLISHED;
652 return GSS_S_COMPLETE;
656 eapGssSmAcceptGssReauth(OM_uint32 *minor,
659 gss_buffer_t inputToken,
660 gss_channel_bindings_t chanBindings,
661 gss_buffer_t outputToken)
663 OM_uint32 major, tmpMinor;
664 gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
665 gss_name_t krbInitiator = GSS_C_NO_NAME;
666 gss_OID mech = GSS_C_NO_OID;
667 OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
669 ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
671 if (cred != GSS_C_NO_CREDENTIAL)
672 krbCred = cred->krbCred;
674 major = gssAcceptSecContext(minor,
685 if (major == GSS_S_COMPLETE) {
686 major = acceptReadyKrb(minor, ctx, cred,
687 krbInitiator, mech, timeRec);
690 ctx->gssFlags = gssFlags;
692 gssReleaseName(&tmpMinor, &krbInitiator);
696 #endif /* GSSEAP_ENABLE_REAUTH */