2 * Copyright (c) 2010, JANET(UK)
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33 #include "gssapiP_eap.h"
36 policyVariableToFlag(enum eapol_bool_var variable)
41 case EAPOL_eapSuccess:
42 flag = CTX_FLAG_EAP_SUCCESS;
44 case EAPOL_eapRestart:
45 flag = CTX_FLAG_EAP_RESTART;
48 flag = CTX_FLAG_EAP_FAIL;
51 flag = CTX_FLAG_EAP_RESP;
54 flag = CTX_FLAG_EAP_NO_RESP;
57 flag = CTX_FLAG_EAP_REQ;
59 case EAPOL_portEnabled:
60 flag = CTX_FLAG_EAP_PORT_ENABLED;
63 flag = CTX_FLAG_EAP_ALT_ACCEPT;
66 flag = CTX_FLAG_EAP_ALT_REJECT;
74 static struct eap_peer_config *
75 peerGetConfig(void *ctx)
77 gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
79 return &gssCtx->initiatorCtx.eapPeerConfig;
83 peerGetBool(void *data, enum eapol_bool_var variable)
85 gss_ctx_id_t ctx = data;
88 if (ctx == GSS_C_NO_CONTEXT)
91 flag = policyVariableToFlag(variable);
93 return ((ctx->flags & flag) != 0);
97 peerSetBool(void *data, enum eapol_bool_var variable,
100 gss_ctx_id_t ctx = data;
103 if (ctx == GSS_C_NO_CONTEXT)
106 flag = policyVariableToFlag(variable);
111 ctx->flags &= ~(flag);
115 peerGetInt(void *data, enum eapol_int_var variable)
117 gss_ctx_id_t ctx = data;
119 if (ctx == GSS_C_NO_CONTEXT)
122 assert(CTX_IS_INITIATOR(ctx));
125 case EAPOL_idleWhile:
126 return ctx->initiatorCtx.idleWhile;
134 peerSetInt(void *data, enum eapol_int_var variable,
137 gss_ctx_id_t ctx = data;
139 if (ctx == GSS_C_NO_CONTEXT)
142 assert(CTX_IS_INITIATOR(ctx));
145 case EAPOL_idleWhile:
146 ctx->initiatorCtx.idleWhile = value;
151 static struct wpabuf *
152 peerGetEapReqData(void *ctx)
154 gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
156 return &gssCtx->initiatorCtx.reqData;
160 peerSetConfigBlob(void *ctx, struct wpa_config_blob *blob)
164 static const struct wpa_config_blob *
165 peerGetConfigBlob(void *ctx, const char *name)
171 peerNotifyPending(void *ctx)
175 static struct eapol_callbacks gssEapPolicyCallbacks = {
187 extern int wpa_debug_level;
190 peerConfigInit(OM_uint32 *minor,
195 krb5_context krbContext;
196 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
197 krb5_error_code code;
200 GSSEAP_KRB_INIT(&krbContext);
203 eapPeerConfig->fragment_size = 1024;
207 code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
210 return GSS_S_FAILURE;
213 eapPeerConfig->identity = (unsigned char *)identity;
214 eapPeerConfig->identity_len = strlen(identity);
215 eapPeerConfig->password = (unsigned char *)cred->password.value;
216 eapPeerConfig->password_len = cred->password.length;
218 return GSS_S_COMPLETE;
222 peerConfigFree(OM_uint32 *minor,
225 krb5_context krbContext;
226 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
228 GSSEAP_KRB_INIT(&krbContext);
230 krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
232 return GSS_S_COMPLETE;
236 initReady(OM_uint32 *minor, gss_ctx_id_t ctx)
239 const unsigned char *key;
242 /* Cache encryption type derived from selected mechanism OID */
243 major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
244 if (GSS_ERROR(major))
247 if (ctx->encryptionType != ENCTYPE_NULL &&
248 eap_key_available(ctx->initiatorCtx.eap)) {
249 key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
251 major = gssEapDeriveRfc3961Key(minor, key, keyLength,
252 ctx->encryptionType, &ctx->rfc3961Key);
253 if (GSS_ERROR(major))
256 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
258 if (GSS_ERROR(major))
262 * draft-howlett-eap-gss says that integrity/confidentialty should
263 * always be advertised as available, but if we have no keying
264 * material it seems confusing to the caller to advertise this.
266 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
269 major = sequenceInit(minor,
272 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
273 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
275 if (GSS_ERROR(major))
278 return GSS_S_COMPLETE;
282 eapGssSmInitAuthenticate(OM_uint32 *minor,
289 gss_channel_bindings_t chanBindings,
290 gss_buffer_t inputToken,
291 gss_buffer_t outputToken)
294 OM_uint32 tmpMajor, tmpMinor;
296 int initialContextToken = 0, code;
297 gss_buffer_desc respBuf;
300 respBuf.value = NULL;
302 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
303 inputToken->length == 0);
305 major = peerConfigInit(minor, cred, ctx, initialContextToken);
306 if (GSS_ERROR(major))
309 if (initialContextToken) {
310 struct eap_config eapConfig;
312 memset(&eapConfig, 0, sizeof(eapConfig));
313 ctx->flags |= CTX_FLAG_EAP_PORT_ENABLED;
315 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
316 &gssEapPolicyCallbacks,
321 if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
324 ctx->expiryTime = now + timeReq;
326 major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
327 if (GSS_ERROR(major))
330 major = gss_duplicate_name(minor, target, &ctx->acceptorName);
331 if (GSS_ERROR(major))
334 if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
335 major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
336 } else if (gssEapIsConcreteMechanismOid(mech)) {
337 if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
338 major = duplicateOid(minor, mech, &ctx->mechanismUsed);
340 major = GSS_S_BAD_MECH;
342 if (GSS_ERROR(major))
345 /* If credentials were provided, check they're usable with this mech */
346 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
347 major = GSS_S_BAD_MECH;
351 respBuf.value = ""; /* emit empty inner token */
352 major = GSS_S_CONTINUE_NEEDED;
355 ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
358 wpabuf_set(&ctx->initiatorCtx.reqData,
359 inputToken->value, inputToken->length);
361 major = GSS_S_CONTINUE_NEEDED;
363 code = eap_peer_sm_step(ctx->initiatorCtx.eap);
364 if (ctx->flags & CTX_FLAG_EAP_RESP) {
367 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
369 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
371 respBuf.length = wpabuf_len(resp);
372 respBuf.value = (void *)wpabuf_head(resp);
374 } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
375 major = initReady(minor, ctx);
376 if (GSS_ERROR(major))
379 ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
380 major = GSS_S_CONTINUE_NEEDED;
381 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
382 } else if ((ctx->flags & CTX_FLAG_EAP_FAIL) || code == 0) {
383 major = GSS_S_FAILURE;
387 if (respBuf.value != NULL) {
390 assert(major == GSS_S_CONTINUE_NEEDED);
392 tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
393 if (GSS_ERROR(tmpMajor)) {
399 wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
400 peerConfigFree(&tmpMinor, ctx);
407 eapGssSmInitKeyTransport(OM_uint32 *minor,
414 gss_channel_bindings_t chanBindings,
415 gss_buffer_t inputToken,
416 gss_buffer_t outputToken)
418 GSSEAP_NOT_IMPLEMENTED;
422 eapGssSmInitSecureAssoc(OM_uint32 *minor,
429 gss_channel_bindings_t chanBindings,
430 gss_buffer_t inputToken,
431 gss_buffer_t outputToken)
433 GSSEAP_NOT_IMPLEMENTED;
438 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
445 gss_channel_bindings_t chanBindings,
446 gss_buffer_t inputToken,
447 gss_buffer_t outputToken)
449 OM_uint32 major, tmpMinor;
450 gss_iov_buffer_desc iov[2];
453 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
454 iov[0].buffer.length = 0;
455 iov[0].buffer.value = NULL;
457 iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;
458 iov[1].buffer.length = 0;
459 iov[1].buffer.value = NULL;
461 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
462 iov[0].buffer = chanBindings->application_data;
464 major = gssEapWrapOrGetMIC(minor, ctx, FALSE, FALSE, iov, 2,
466 if (GSS_ERROR(major))
469 /* Skip past token ID */
470 assert(iov[1].buffer.length > 2);
471 assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
473 buf.length = iov[1].buffer.length - 2;
474 buf.value = (unsigned char *)iov[1].buffer.value + 2;
476 major = duplicateBuffer(minor, &buf, outputToken);
477 if (GSS_ERROR(major))
480 major = GSS_S_COMPLETE;
481 ctx->state = EAP_STATE_ESTABLISHED;
484 gssEapReleaseIov(iov, 2);
490 eapGssSmInitEstablished(OM_uint32 *minor,
497 gss_channel_bindings_t chanBindings,
498 gss_buffer_t inputToken,
499 gss_buffer_t outputToken)
501 /* Called with already established context */
503 return GSS_S_BAD_STATUS;
506 static struct gss_eap_initiator_sm {
507 enum gss_eap_token_type inputTokenType;
508 enum gss_eap_token_type outputTokenType;
509 OM_uint32 (*processToken)(OM_uint32 *,
516 gss_channel_bindings_t,
519 } eapGssInitiatorSm[] = {
520 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitAuthenticate },
522 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitKeyTransport },
523 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitSecureAssoc },
525 { TOK_TYPE_NONE, TOK_TYPE_GSS_CB, eapGssSmInitGssChannelBindings },
526 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmInitEstablished },
530 gss_init_sec_context(OM_uint32 *minor,
532 gss_ctx_id_t *context_handle,
533 gss_name_t target_name,
537 gss_channel_bindings_t input_chan_bindings,
538 gss_buffer_t input_token,
539 gss_OID *actual_mech_type,
540 gss_buffer_t output_token,
541 OM_uint32 *ret_flags,
545 OM_uint32 tmpMajor, tmpMinor;
546 gss_ctx_id_t ctx = *context_handle;
547 struct gss_eap_initiator_sm *sm = NULL;
548 gss_buffer_desc innerInputToken, innerOutputToken;
552 innerOutputToken.length = 0;
553 innerOutputToken.value = NULL;
555 output_token->length = 0;
556 output_token->value = NULL;
558 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
559 return GSS_S_NO_CRED;
562 if (ctx == GSS_C_NO_CONTEXT) {
563 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
564 return GSS_S_DEFECTIVE_TOKEN;
567 major = gssEapAllocContext(minor, &ctx);
568 if (GSS_ERROR(major))
571 ctx->flags |= CTX_FLAG_INITIATOR;
573 *context_handle = ctx;
576 GSSEAP_MUTEX_LOCK(&ctx->mutex);
578 sm = &eapGssInitiatorSm[ctx->state];
580 if (input_token != GSS_C_NO_BUFFER) {
581 major = gssEapVerifyToken(minor, ctx, input_token,
582 sm->inputTokenType, &innerInputToken);
583 if (GSS_ERROR(major))
586 innerInputToken.length = 0;
587 innerInputToken.value = NULL;
591 * Advance through state machine whilst empty tokens are emitted and
592 * the status is not GSS_S_COMPLETE or an error status.
595 sm = &eapGssInitiatorSm[ctx->state];
597 major = (sm->processToken)(minor,
607 if (GSS_ERROR(major))
609 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.value == NULL);
611 if (actual_mech_type != NULL) {
612 if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
613 duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
615 if (innerOutputToken.value != NULL) {
616 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
617 sm->outputTokenType, output_token);
618 if (GSS_ERROR(tmpMajor)) {
624 if (ret_flags != NULL)
625 *ret_flags = ctx->gssFlags;
626 if (time_rec != NULL)
627 gss_context_time(&tmpMinor, ctx, time_rec);
629 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
632 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
634 if (GSS_ERROR(major))
635 gssEapReleaseContext(&tmpMinor, context_handle);
637 gss_release_buffer(&tmpMinor, &innerOutputToken);