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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 completeInit(OM_uint32 *minor,
240 const unsigned char *key;
242 krb5_context krbContext;
244 GSSEAP_KRB_INIT(&krbContext);
246 /* Cache encryption type derived from selected mechanism OID */
247 major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
248 if (GSS_ERROR(major))
251 if (ctx->encryptionType != ENCTYPE_NULL &&
252 eap_key_available(ctx->initiatorCtx.eap)) {
253 key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
255 major = gssEapDeriveRFC3961Key(minor, key, keyLength,
256 ctx->encryptionType, &ctx->rfc3961Key);
257 if (GSS_ERROR(major))
261 * draft-howlett-eap-gss says that integrity/confidentialty should
262 * always be advertised as available, but if we have no keying
263 * material it seems confusing to the caller to advertise this.
265 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
268 sequenceInit(&ctx->seqState, ctx->recvSeq,
269 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
270 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
273 return GSS_S_COMPLETE;
277 eapGssSmInitAuthenticate(OM_uint32 *minor,
284 gss_channel_bindings_t chanBindings,
285 gss_buffer_t inputToken,
286 gss_buffer_t outputToken)
289 OM_uint32 tmpMajor, tmpMinor;
291 int initialContextToken = 0, code;
292 struct wpabuf *resp = NULL;
294 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
295 inputToken->length == 0);
297 major = peerConfigInit(minor, cred, ctx, initialContextToken);
298 if (GSS_ERROR(major))
301 if (initialContextToken) {
302 struct eap_config eapConfig;
304 memset(&eapConfig, 0, sizeof(eapConfig));
305 ctx->flags |= CTX_FLAG_EAP_PORT_ENABLED;
307 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
308 &gssEapPolicyCallbacks,
313 if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
316 ctx->expiryTime = now + timeReq;
318 major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
319 if (GSS_ERROR(major))
322 major = gss_duplicate_name(minor, target, &ctx->acceptorName);
323 if (GSS_ERROR(major))
326 if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
327 major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
328 } else if (gssEapIsConcreteMechanismOid(mech)) {
329 if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
330 major = duplicateOid(minor, mech, &ctx->mechanismUsed);
332 major = GSS_S_BAD_MECH;
334 if (GSS_ERROR(major))
337 /* Use this to emit an empty token*/
338 wpabuf_set(&ctx->initiatorCtx.reqData, "", 0);
339 resp = &ctx->initiatorCtx.reqData;
340 major = GSS_S_CONTINUE_NEEDED;
343 ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
346 wpabuf_set(&ctx->initiatorCtx.reqData,
347 inputToken->value, inputToken->length);
349 major = GSS_S_CONTINUE_NEEDED;
351 code = eap_peer_sm_step(ctx->initiatorCtx.eap);
352 if (ctx->flags & CTX_FLAG_EAP_RESP) {
353 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
355 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
356 } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
357 major = completeInit(minor, ctx);
358 ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
359 ctx->state = EAP_STATE_ESTABLISHED;
360 } else if ((ctx->flags & CTX_FLAG_EAP_FAIL) || code == 0) {
361 major = GSS_S_FAILURE;
369 assert(major == GSS_S_CONTINUE_NEEDED);
371 buf.length = wpabuf_len(resp);
372 buf.value = (void *)wpabuf_head(resp);
374 tmpMajor = duplicateBuffer(&tmpMinor, &buf, outputToken);
375 if (GSS_ERROR(tmpMajor)) {
381 wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
382 peerConfigFree(&tmpMinor, ctx);
388 eapGssSmInitKeyTransport(OM_uint32 *minor,
395 gss_channel_bindings_t chanBindings,
396 gss_buffer_t inputToken,
397 gss_buffer_t outputToken)
399 GSSEAP_NOT_IMPLEMENTED;
403 eapGssSmInitSecureAssoc(OM_uint32 *minor,
410 gss_channel_bindings_t chanBindings,
411 gss_buffer_t inputToken,
412 gss_buffer_t outputToken)
414 GSSEAP_NOT_IMPLEMENTED;
418 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
425 gss_channel_bindings_t chanBindings,
426 gss_buffer_t inputToken,
427 gss_buffer_t outputToken)
429 GSSEAP_NOT_IMPLEMENTED;
433 eapGssSmInitEstablished(OM_uint32 *minor,
440 gss_channel_bindings_t chanBindings,
441 gss_buffer_t inputToken,
442 gss_buffer_t outputToken)
444 /* Called with already established context */
446 return GSS_S_BAD_STATUS;
449 static struct eap_gss_initiator_sm {
450 enum gss_eap_token_type inputTokenType;
451 enum gss_eap_token_type outputTokenType;
452 OM_uint32 (*processToken)(OM_uint32 *,
459 gss_channel_bindings_t,
462 } eapGssInitiatorSm[] = {
463 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitAuthenticate },
464 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitKeyTransport },
465 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitSecureAssoc },
466 { TOK_TYPE_GSS_CB, TOK_TYPE_NONE, eapGssSmInitGssChannelBindings },
467 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmInitEstablished },
471 gss_init_sec_context(OM_uint32 *minor,
473 gss_ctx_id_t *context_handle,
474 gss_name_t target_name,
478 gss_channel_bindings_t input_chan_bindings,
479 gss_buffer_t input_token,
480 gss_OID *actual_mech_type,
481 gss_buffer_t output_token,
482 OM_uint32 *ret_flags,
486 OM_uint32 tmpMajor, tmpMinor;
487 gss_ctx_id_t ctx = *context_handle;
488 struct eap_gss_initiator_sm *sm = NULL;
489 gss_buffer_desc innerInputToken, innerOutputToken;
493 innerOutputToken.length = 0;
494 innerOutputToken.value = NULL;
496 output_token->length = 0;
497 output_token->value = NULL;
499 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
500 return GSS_S_NO_CRED;
503 if (ctx == GSS_C_NO_CONTEXT) {
504 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
505 return GSS_S_DEFECTIVE_TOKEN;
508 major = gssEapAllocContext(minor, &ctx);
509 if (GSS_ERROR(major))
512 ctx->flags |= CTX_FLAG_INITIATOR;
514 *context_handle = ctx;
517 GSSEAP_MUTEX_LOCK(&ctx->mutex);
519 sm = &eapGssInitiatorSm[ctx->state];
521 if (input_token != GSS_C_NO_BUFFER) {
522 major = gssEapVerifyToken(minor, ctx, input_token,
523 sm->inputTokenType, &innerInputToken);
524 if (GSS_ERROR(major))
527 innerInputToken.length = 0;
528 innerInputToken.value = NULL;
532 * Advance through state machine whilst empty tokens are emitted and
533 * the status is not GSS_S_COMPLETE or an error status.
536 major = (sm->processToken)(minor,
546 if (GSS_ERROR(major))
548 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.value == NULL);
550 if (actual_mech_type != NULL) {
551 if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
552 duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
554 if (innerOutputToken.value != NULL) {
555 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
556 sm->outputTokenType, output_token);
557 if (GSS_ERROR(tmpMajor)) {
563 if (ret_flags != NULL)
564 *ret_flags = ctx->gssFlags;
565 if (time_rec != NULL)
566 gss_context_time(&tmpMinor, ctx, time_rec);
568 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
571 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
573 if (GSS_ERROR(major))
574 gssEapReleaseContext(&tmpMinor, context_handle);
576 gss_release_buffer(&tmpMinor, &innerOutputToken);