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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 = {
187 peerConfigInit(OM_uint32 *minor,
192 krb5_context krbContext;
193 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
194 krb5_error_code code;
197 GSSEAP_KRB_INIT(&krbContext);
202 code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
205 return GSS_S_FAILURE;
208 eapPeerConfig->identity = (unsigned char *)identity;
209 eapPeerConfig->identity_len = strlen(identity);
210 eapPeerConfig->password = (unsigned char *)cred->password.value;
211 eapPeerConfig->password_len = cred->password.length;
213 return GSS_S_COMPLETE;
217 peerConfigFree(OM_uint32 *minor,
220 krb5_context krbContext;
221 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
223 GSSEAP_KRB_INIT(&krbContext);
225 krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
227 return GSS_S_COMPLETE;
231 peerDeriveKey(OM_uint32 *minor,
235 const unsigned char *key;
237 krb5_context krbContext;
239 GSSEAP_KRB_INIT(&krbContext);
241 /* Cache encryption type derived from selected mechanism OID */
242 major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
243 if (GSS_ERROR(major))
246 if (ctx->encryptionType != ENCTYPE_NULL &&
247 eap_key_available(ctx->initiatorCtx.eap)) {
248 key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
250 major = gssEapDeriveRFC3961Key(minor, key, keyLength,
251 ctx->encryptionType, &ctx->rfc3961Key);
252 if (GSS_ERROR(major))
256 * draft-howlett-eap-gss says that integrity/confidentialty should
257 * always be advertised as available, but if we have no keying
258 * material it seems confusing to the caller to advertise this.
260 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
263 return GSS_S_COMPLETE;
267 eapGssSmInitAuthenticate(OM_uint32 *minor,
274 gss_channel_bindings_t chanBindings,
275 gss_buffer_t inputToken,
276 gss_buffer_t outputToken)
278 OM_uint32 major, tmpMinor;
280 int initialContextToken = 0, code;
282 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
283 inputToken->length == 0);
285 major = peerConfigInit(minor, cred, ctx, initialContextToken);
286 if (GSS_ERROR(major))
289 if (initialContextToken) {
290 ctx->flags |= CTX_FLAG_EAP_PORT_ENABLED;
292 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
293 &gssEapPolicyCallbacks,
295 &ctx->initiatorCtx.eapConfig);
298 if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
301 ctx->expiryTime = now + timeReq;
303 major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
304 if (GSS_ERROR(major))
307 major = gss_duplicate_name(minor, target, &ctx->acceptorName);
308 if (GSS_ERROR(major))
311 if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
312 major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
313 } else if (gssEapIsConcreteMechanismOid(mech)) {
314 if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
315 major = duplicateOid(minor, mech, &ctx->mechanismUsed);
317 major = GSS_S_BAD_MECH;
319 if (GSS_ERROR(major))
323 wpabuf_set(&ctx->initiatorCtx.reqData,
324 inputToken->value, inputToken->length);
326 code = eap_peer_sm_step(ctx->initiatorCtx.eap);
328 if (ctx->flags & CTX_FLAG_EAP_RESP) {
332 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
334 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
337 buf.length = wpabuf_len(resp);
338 buf.value = (void *)wpabuf_head(resp);
340 major = duplicateBuffer(minor, &buf, outputToken);
341 if (GSS_ERROR(major))
344 major = GSS_S_CONTINUE_NEEDED;
348 if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
349 major = peerDeriveKey(minor, ctx);
350 if (GSS_ERROR(major))
353 ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
354 ctx->state = EAP_STATE_ESTABLISHED;
355 major = GSS_S_COMPLETE;
356 } else if ((ctx->flags & CTX_FLAG_EAP_FAIL) || code == 0) {
357 major = GSS_S_FAILURE;
361 wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
362 peerConfigFree(&tmpMinor, ctx);
368 eapGssSmInitKeyTransport(OM_uint32 *minor,
375 gss_channel_bindings_t chanBindings,
376 gss_buffer_t inputToken,
377 gss_buffer_t outputToken)
379 GSSEAP_NOT_IMPLEMENTED;
383 eapGssSmInitSecureAssoc(OM_uint32 *minor,
390 gss_channel_bindings_t chanBindings,
391 gss_buffer_t inputToken,
392 gss_buffer_t outputToken)
394 GSSEAP_NOT_IMPLEMENTED;
398 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
405 gss_channel_bindings_t chanBindings,
406 gss_buffer_t inputToken,
407 gss_buffer_t outputToken)
409 GSSEAP_NOT_IMPLEMENTED;
413 eapGssSmInitEstablished(OM_uint32 *minor,
420 gss_channel_bindings_t chanBindings,
421 gss_buffer_t inputToken,
422 gss_buffer_t outputToken)
424 /* Called with already established context */
426 return GSS_S_BAD_STATUS;
429 static struct eap_gss_initiator_sm {
430 enum gss_eap_token_type inputTokenType;
431 enum gss_eap_token_type outputTokenType;
432 OM_uint32 (*processToken)(OM_uint32 *,
439 gss_channel_bindings_t,
442 } eapGssInitiatorSm[] = {
443 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitAuthenticate },
444 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitKeyTransport },
445 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitSecureAssoc },
446 { TOK_TYPE_GSS_CB, TOK_TYPE_NONE, eapGssSmInitGssChannelBindings },
447 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmInitEstablished },
451 gss_init_sec_context(OM_uint32 *minor,
453 gss_ctx_id_t *context_handle,
454 gss_name_t target_name,
458 gss_channel_bindings_t input_chan_bindings,
459 gss_buffer_t input_token,
460 gss_OID *actual_mech_type,
461 gss_buffer_t output_token,
462 OM_uint32 *ret_flags,
465 OM_uint32 major, tmpMinor;
466 gss_ctx_id_t ctx = *context_handle;
467 struct eap_gss_initiator_sm *sm = NULL;
468 gss_buffer_desc innerInputToken, innerOutputToken;
472 innerOutputToken.length = 0;
473 innerOutputToken.value = NULL;
475 output_token->length = 0;
476 output_token->value = NULL;
478 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
479 return GSS_S_NO_CRED;
482 if (ctx == GSS_C_NO_CONTEXT) {
483 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
484 return GSS_S_DEFECTIVE_TOKEN;
487 major = gssEapAllocContext(minor, &ctx);
488 if (GSS_ERROR(major))
491 ctx->flags |= CTX_FLAG_INITIATOR;
493 *context_handle = ctx;
496 GSSEAP_MUTEX_LOCK(&ctx->mutex);
498 sm = &eapGssInitiatorSm[ctx->state];
500 if (input_token != GSS_C_NO_BUFFER) {
501 major = gssEapVerifyToken(minor, ctx, input_token,
502 sm->inputTokenType, &innerInputToken);
503 if (GSS_ERROR(major))
506 innerInputToken.length = 0;
507 innerInputToken.value = NULL;
511 * Advance through state machine whilst empty tokens are emitted and
512 * the status is not GSS_S_COMPLETE or an error status.
515 major = (sm->processToken)(minor,
525 if (GSS_ERROR(major))
527 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
529 if (actual_mech_type != NULL) {
530 if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
531 duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
533 if (innerOutputToken.length != 0) {
534 major = gssEapMakeToken(minor, ctx, &innerOutputToken,
535 sm->outputTokenType, output_token);
536 if (GSS_ERROR(major))
539 if (ret_flags != NULL)
540 *ret_flags = ctx->gssFlags;
541 if (time_rec != NULL)
542 gss_context_time(&tmpMinor, ctx, time_rec);
544 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
547 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
549 if (GSS_ERROR(major))
550 gssEapReleaseContext(&tmpMinor, context_handle);
552 gss_release_buffer(&tmpMinor, &innerOutputToken);