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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)
157 peerSetConfigBlob(void *ctx, struct wpa_config_blob *blob)
161 static const struct wpa_config_blob *
162 peerGetConfigBlob(void *ctx, const char *name)
168 peerNotifyPending(void *ctx)
172 static struct eapol_callbacks gssEapPolicyCallbacks = {
185 peerConfigInit(OM_uint32 *minor,
190 krb5_context krbContext;
191 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
192 krb5_error_code code;
195 GSSEAP_KRB_INIT(&krbContext);
200 code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
203 return GSS_S_FAILURE;
206 eapPeerConfig->identity = (unsigned char *)identity;
207 eapPeerConfig->identity_len = strlen(identity);
208 eapPeerConfig->password = (unsigned char *)cred->password.value;
209 eapPeerConfig->password_len = cred->password.length;
211 return GSS_S_COMPLETE;
215 peerConfigFree(OM_uint32 *minor,
218 krb5_context krbContext;
219 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
221 GSSEAP_KRB_INIT(&krbContext);
223 krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
225 return GSS_S_COMPLETE;
229 peerDeriveKey(OM_uint32 *minor,
233 const unsigned char *key;
235 krb5_context krbContext;
237 GSSEAP_KRB_INIT(&krbContext);
239 /* Cache encryption type derived from selected mechanism OID */
240 major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
241 if (GSS_ERROR(major))
244 if (ctx->encryptionType != ENCTYPE_NULL &&
245 eap_key_available(ctx->initiatorCtx.eap)) {
246 key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
248 major = gssEapDeriveRFC3961Key(minor, key, keyLength,
249 ctx->encryptionType, &ctx->rfc3961Key);
250 if (GSS_ERROR(major))
254 * draft-howlett-eap-gss says that integrity/confidentialty should
255 * always be advertised as available, but if we have no keying
256 * material it seems confusing to the caller to advertise this.
258 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
261 return GSS_S_COMPLETE;
265 eapGssSmInitAuthenticate(OM_uint32 *minor,
272 gss_channel_bindings_t chanBindings,
273 gss_buffer_t inputToken,
274 gss_buffer_t outputToken)
276 OM_uint32 major, tmpMinor;
278 int initialContextToken = 0, code;
280 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
281 inputToken->length == 0);
283 major = peerConfigInit(minor, cred, ctx, initialContextToken);
284 if (GSS_ERROR(major))
287 if (initialContextToken) {
288 ctx->flags |= CTX_FLAG_EAP_PORT_ENABLED;
290 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
291 &gssEapPolicyCallbacks,
293 &ctx->initiatorCtx.eapConfig);
296 if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
299 ctx->expiryTime = now + timeReq;
301 major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
302 if (GSS_ERROR(major))
305 major = gss_duplicate_name(minor, target, &ctx->acceptorName);
306 if (GSS_ERROR(major))
309 if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
310 major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
311 } else if (gssEapIsConcreteMechanismOid(mech)) {
312 if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
313 major = duplicateOid(minor, mech, &ctx->mechanismUsed);
315 major = GSS_S_BAD_MECH;
317 if (GSS_ERROR(major))
321 code = eap_peer_sm_step(ctx->initiatorCtx.eap);
323 if (ctx->flags & CTX_FLAG_EAP_RESP) {
327 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
329 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
332 buf.length = wpabuf_len(resp);
333 buf.value = (void *)wpabuf_head(resp);
335 major = duplicateBuffer(minor, &buf, outputToken);
336 if (GSS_ERROR(major))
339 major = GSS_S_CONTINUE_NEEDED;
343 if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
344 major = peerDeriveKey(minor, ctx);
345 if (GSS_ERROR(major))
348 ctx->state = EAP_STATE_ESTABLISHED;
349 } else if (code == 0) {
350 major = GSS_S_FAILURE;
354 peerConfigFree(&tmpMinor, ctx);
360 eapGssSmInitKeyTransport(OM_uint32 *minor,
367 gss_channel_bindings_t chanBindings,
368 gss_buffer_t inputToken,
369 gss_buffer_t outputToken)
371 GSSEAP_NOT_IMPLEMENTED;
375 eapGssSmInitSecureAssoc(OM_uint32 *minor,
382 gss_channel_bindings_t chanBindings,
383 gss_buffer_t inputToken,
384 gss_buffer_t outputToken)
386 GSSEAP_NOT_IMPLEMENTED;
390 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
397 gss_channel_bindings_t chanBindings,
398 gss_buffer_t inputToken,
399 gss_buffer_t outputToken)
401 GSSEAP_NOT_IMPLEMENTED;
405 eapGssSmInitEstablished(OM_uint32 *minor,
412 gss_channel_bindings_t chanBindings,
413 gss_buffer_t inputToken,
414 gss_buffer_t outputToken)
416 /* Called with already established context */
418 return GSS_S_BAD_STATUS;
421 static struct eap_gss_initiator_sm {
422 enum gss_eap_token_type inputTokenType;
423 enum gss_eap_token_type outputTokenType;
424 OM_uint32 (*processToken)(OM_uint32 *,
431 gss_channel_bindings_t,
434 } eapGssInitiatorSm[] = {
435 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitAuthenticate },
436 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitKeyTransport },
437 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitSecureAssoc },
438 { TOK_TYPE_GSS_CB, TOK_TYPE_NONE, eapGssSmInitGssChannelBindings },
439 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmInitEstablished },
443 gss_init_sec_context(OM_uint32 *minor,
445 gss_ctx_id_t *context_handle,
446 gss_name_t target_name,
450 gss_channel_bindings_t input_chan_bindings,
451 gss_buffer_t input_token,
452 gss_OID *actual_mech_type,
453 gss_buffer_t output_token,
454 OM_uint32 *ret_flags,
457 OM_uint32 major, tmpMinor;
458 gss_ctx_id_t ctx = *context_handle;
459 struct eap_gss_initiator_sm *sm = NULL;
460 gss_buffer_desc innerInputToken, innerOutputToken;
464 innerOutputToken.length = 0;
465 innerOutputToken.value = NULL;
467 output_token->length = 0;
468 output_token->value = NULL;
470 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
471 return GSS_S_NO_CRED;
474 if (ctx == GSS_C_NO_CONTEXT) {
475 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
476 return GSS_S_DEFECTIVE_TOKEN;
479 major = gssEapAllocContext(minor, &ctx);
480 if (GSS_ERROR(major))
483 ctx->flags |= CTX_FLAG_INITIATOR;
485 *context_handle = ctx;
488 GSSEAP_MUTEX_LOCK(&ctx->mutex);
490 sm = &eapGssInitiatorSm[ctx->state];
492 if (input_token != GSS_C_NO_BUFFER) {
493 major = gssEapVerifyToken(minor, ctx, input_token,
494 sm->inputTokenType, &innerInputToken);
495 if (GSS_ERROR(major))
498 innerInputToken.length = 0;
499 innerInputToken.value = NULL;
502 major = (sm->processToken)(minor,
512 if (GSS_ERROR(major))
515 if (actual_mech_type != NULL) {
516 if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
517 duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
519 if (innerOutputToken.length != 0) {
520 major = gssEapMakeToken(minor, ctx, &innerOutputToken,
521 sm->outputTokenType, output_token);
522 if (GSS_ERROR(major))
525 if (ret_flags != NULL)
526 *ret_flags = ctx->gssFlags;
527 if (time_rec != NULL)
528 gss_context_time(&tmpMinor, ctx, time_rec);
530 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
533 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
535 if (GSS_ERROR(major))
536 gssEapReleaseContext(&tmpMinor, context_handle);
538 gss_release_buffer(&tmpMinor, &innerOutputToken);