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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;
73 static struct eap_peer_config *
74 peerGetConfig(void *ctx)
76 gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
78 return &gssCtx->initiatorCtx.eapPeerConfig;
82 peerGetBool(void *data, enum eapol_bool_var variable)
84 gss_ctx_id_t ctx = data;
87 if (ctx == GSS_C_NO_CONTEXT)
90 flag = policyVariableToFlag(variable);
92 return ((ctx->flags & flag) != 0);
96 peerSetBool(void *data, enum eapol_bool_var variable,
99 gss_ctx_id_t ctx = data;
102 if (ctx == GSS_C_NO_CONTEXT)
105 flag = policyVariableToFlag(variable);
110 ctx->flags &= ~(flag);
114 peerGetInt(void *data, enum eapol_int_var variable)
116 gss_ctx_id_t ctx = data;
118 if (ctx == GSS_C_NO_CONTEXT)
121 assert(CTX_IS_INITIATOR(ctx));
124 case EAPOL_idleWhile:
125 return ctx->initiatorCtx.idleWhile;
133 peerSetInt(void *data, enum eapol_int_var variable,
136 gss_ctx_id_t ctx = data;
138 if (ctx == GSS_C_NO_CONTEXT)
141 assert(CTX_IS_INITIATOR(ctx));
144 case EAPOL_idleWhile:
145 ctx->initiatorCtx.idleWhile = value;
150 static struct wpabuf *
151 peerGetEapReqData(void *ctx)
153 gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
155 return &gssCtx->initiatorCtx.reqData;
159 peerSetConfigBlob(void *ctx, struct wpa_config_blob *blob)
163 static const struct wpa_config_blob *
164 peerGetConfigBlob(void *ctx, const char *name)
170 peerNotifyPending(void *ctx)
174 static struct eapol_callbacks gssEapPolicyCallbacks = {
186 extern int wpa_debug_level;
189 peerConfigInit(OM_uint32 *minor,
193 krb5_context krbContext;
194 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
195 krb5_error_code code;
198 GSSEAP_KRB_INIT(&krbContext);
200 eapPeerConfig->fragment_size = 1024;
203 code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
206 return GSS_S_FAILURE;
209 eapPeerConfig->identity = (unsigned char *)identity;
210 eapPeerConfig->identity_len = strlen(identity);
211 eapPeerConfig->password = (unsigned char *)cred->password.value;
212 eapPeerConfig->password_len = cred->password.length;
214 return GSS_S_COMPLETE;
218 peerConfigFree(OM_uint32 *minor,
221 krb5_context krbContext;
222 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
224 GSSEAP_KRB_INIT(&krbContext);
226 krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
228 return GSS_S_COMPLETE;
232 initReady(OM_uint32 *minor, gss_ctx_id_t ctx)
235 const unsigned char *key;
237 krb5_enctype encryptionType;
240 /* Cache encryption type derived from selected mechanism OID */
241 major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &encryptionType);
242 if (GSS_ERROR(major))
245 if (encryptionType != ENCTYPE_NULL &&
246 eap_key_available(ctx->initiatorCtx.eap)) {
247 key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
249 if (keyLength >= EAP_EMSK_LEN) {
250 major = gssEapDeriveRfc3961Key(minor,
251 &key[EAP_EMSK_LEN / 2],
255 if (GSS_ERROR(major))
258 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
260 if (GSS_ERROR(major))
267 ctx->encryptionType = encryptionType;
270 * draft-howlett-eap-gss says that integrity/confidentialty should
271 * always be advertised as available, but if we have no keying
272 * material it seems confusing to the caller to advertise this.
274 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
277 major = sequenceInit(minor,
280 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
281 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
283 if (GSS_ERROR(major))
286 return GSS_S_COMPLETE;
290 eapGssSmInitIdentity(OM_uint32 *minor,
297 gss_channel_bindings_t chanBindings,
298 gss_buffer_t inputToken,
299 gss_buffer_t outputToken)
303 int initialContextToken;
305 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
306 inputToken->length == 0);
307 if (!initialContextToken)
308 return GSS_S_DEFECTIVE_TOKEN;
311 if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
314 ctx->expiryTime = now + timeReq;
316 major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
317 if (GSS_ERROR(major))
320 major = gss_duplicate_name(minor, target, &ctx->acceptorName);
321 if (GSS_ERROR(major))
324 if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
325 major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
326 } else if (gssEapIsConcreteMechanismOid(mech)) {
327 if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
328 major = duplicateOid(minor, mech, &ctx->mechanismUsed);
330 major = GSS_S_BAD_MECH;
332 if (GSS_ERROR(major))
335 /* If credentials were provided, check they're usable with this mech */
336 if (!gssEapCredAvailable(cred, ctx->mechanismUsed))
337 return GSS_S_BAD_MECH;
339 ctx->state = EAP_STATE_AUTHENTICATE;
341 return GSS_S_CONTINUE_NEEDED;
344 static struct wpabuf emptyWpaBuffer;
347 eapGssSmInitAuthenticate(OM_uint32 *minor,
354 gss_channel_bindings_t chanBindings,
355 gss_buffer_t inputToken,
356 gss_buffer_t outputToken)
361 struct wpabuf *resp = NULL;
362 int initialContextToken;
364 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
365 inputToken->length == 0);
367 major = peerConfigInit(minor, cred, ctx);
368 if (GSS_ERROR(major))
371 if (ctx->initiatorCtx.eap == NULL) {
372 struct eap_config eapConfig;
374 memset(&eapConfig, 0, sizeof(eapConfig));
376 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
377 &gssEapPolicyCallbacks,
380 if (ctx->initiatorCtx.eap == NULL) {
381 major = GSS_S_FAILURE;
385 ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
388 ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
390 wpabuf_set(&ctx->initiatorCtx.reqData,
391 inputToken->value, inputToken->length);
393 major = GSS_S_CONTINUE_NEEDED;
395 code = eap_peer_sm_step(ctx->initiatorCtx.eap);
396 if (ctx->flags & CTX_FLAG_EAP_RESP) {
397 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
399 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
400 } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
401 major = initReady(minor, ctx);
402 if (GSS_ERROR(major))
405 ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
406 major = GSS_S_CONTINUE_NEEDED;
407 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
408 } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
409 major = GSS_S_DEFECTIVE_CREDENTIAL;
410 } else if (code == 0 && initialContextToken) {
411 resp = &emptyWpaBuffer;
412 major = GSS_S_CONTINUE_NEEDED;
414 major = GSS_S_DEFECTIVE_TOKEN;
420 gss_buffer_desc respBuf;
422 assert(major == GSS_S_CONTINUE_NEEDED);
424 respBuf.length = wpabuf_len(resp);
425 respBuf.value = (void *)wpabuf_head(resp);
427 tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
428 if (GSS_ERROR(tmpMajor)) {
434 wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
435 peerConfigFree(&tmpMinor, ctx);
441 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
448 gss_channel_bindings_t chanBindings,
449 gss_buffer_t inputToken,
450 gss_buffer_t outputToken)
453 gss_iov_buffer_desc iov[2];
456 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
457 iov[0].buffer.length = 0;
458 iov[0].buffer.value = NULL;
460 iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;
461 iov[1].buffer.length = 0;
462 iov[1].buffer.value = NULL;
464 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
465 iov[0].buffer = chanBindings->application_data;
467 major = gssEapWrapOrGetMIC(minor, ctx, FALSE, FALSE, iov, 2,
469 if (GSS_ERROR(major))
472 /* Skip past token ID */
473 assert(iov[1].buffer.length > 2);
474 assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
476 buf.length = iov[1].buffer.length - 2;
477 buf.value = (unsigned char *)iov[1].buffer.value + 2;
479 major = duplicateBuffer(minor, &buf, outputToken);
480 if (GSS_ERROR(major))
483 major = GSS_S_COMPLETE;
484 ctx->state = EAP_STATE_ESTABLISHED;
487 gssEapReleaseIov(iov, 2);
493 eapGssSmInitEstablished(OM_uint32 *minor,
500 gss_channel_bindings_t chanBindings,
501 gss_buffer_t inputToken,
502 gss_buffer_t outputToken)
504 /* Called with already established context */
506 return GSS_S_BAD_STATUS;
509 static struct gss_eap_initiator_sm {
510 enum gss_eap_token_type inputTokenType;
511 enum gss_eap_token_type outputTokenType;
512 OM_uint32 (*processToken)(OM_uint32 *,
519 gss_channel_bindings_t,
522 } eapGssInitiatorSm[] = {
523 { TOK_TYPE_NONE, TOK_TYPE_EAP_RESP, eapGssSmInitIdentity },
524 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitAuthenticate },
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;
549 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
553 output_token->length = 0;
554 output_token->value = NULL;
556 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
557 return GSS_S_NO_CRED;
560 if (ctx == GSS_C_NO_CONTEXT) {
561 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
562 return GSS_S_DEFECTIVE_TOKEN;
565 major = gssEapAllocContext(minor, &ctx);
566 if (GSS_ERROR(major))
569 ctx->flags |= CTX_FLAG_INITIATOR;
571 *context_handle = ctx;
574 GSSEAP_MUTEX_LOCK(&ctx->mutex);
576 sm = &eapGssInitiatorSm[ctx->state];
578 if (input_token != GSS_C_NO_BUFFER) {
579 major = gssEapVerifyToken(minor, ctx, input_token,
580 sm->inputTokenType, &innerInputToken);
581 if (GSS_ERROR(major))
584 innerInputToken.length = 0;
585 innerInputToken.value = NULL;
589 * Advance through state machine whilst empty tokens are emitted and
590 * the status is not GSS_S_COMPLETE or an error status.
593 sm = &eapGssInitiatorSm[ctx->state];
595 major = (sm->processToken)(minor,
605 if (GSS_ERROR(major))
607 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.value == NULL);
609 if (actual_mech_type != NULL) {
610 if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
611 duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
613 if (innerOutputToken.value != NULL) {
614 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
615 sm->outputTokenType, output_token);
616 if (GSS_ERROR(tmpMajor)) {
622 if (ret_flags != NULL)
623 *ret_flags = ctx->gssFlags;
624 if (time_rec != NULL)
625 gss_context_time(&tmpMinor, ctx, time_rec);
627 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
630 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
632 if (GSS_ERROR(major))
633 gssEapReleaseContext(&tmpMinor, context_handle);
635 gss_release_buffer(&tmpMinor, &innerOutputToken);