2 * Copyright (c) 2010, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of JANET(UK) nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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,
194 krb5_context krbContext;
195 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
196 krb5_error_code code;
199 GSSEAP_KRB_INIT(&krbContext);
202 eapPeerConfig->fragment_size = 1024;
206 code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
209 return GSS_S_FAILURE;
212 eapPeerConfig->identity = (unsigned char *)identity;
213 eapPeerConfig->identity_len = strlen(identity);
214 eapPeerConfig->password = (unsigned char *)cred->password.value;
215 eapPeerConfig->password_len = cred->password.length;
217 return GSS_S_COMPLETE;
221 peerConfigFree(OM_uint32 *minor,
224 krb5_context krbContext;
225 struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
227 GSSEAP_KRB_INIT(&krbContext);
229 krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
231 return GSS_S_COMPLETE;
235 initReady(OM_uint32 *minor, gss_ctx_id_t ctx)
238 const unsigned char *key;
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))
255 major = rfc3961ChecksumTypeForKey(minor, &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 major = sequenceInit(minor,
271 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
272 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
274 if (GSS_ERROR(major))
277 return GSS_S_COMPLETE;
281 eapGssSmInitAuthenticate(OM_uint32 *minor,
288 gss_channel_bindings_t chanBindings,
289 gss_buffer_t inputToken,
290 gss_buffer_t outputToken)
293 OM_uint32 tmpMajor, tmpMinor;
295 int initialContextToken = 0, code;
296 gss_buffer_desc respBuf = GSS_C_EMPTY_BUFFER;
298 initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
299 inputToken->length == 0);
301 major = peerConfigInit(minor, cred, ctx, initialContextToken);
302 if (GSS_ERROR(major))
305 if (initialContextToken) {
306 struct eap_config eapConfig;
308 memset(&eapConfig, 0, sizeof(eapConfig));
309 ctx->flags |= CTX_FLAG_EAP_PORT_ENABLED;
311 ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
312 &gssEapPolicyCallbacks,
317 if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
320 ctx->expiryTime = now + timeReq;
322 major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
323 if (GSS_ERROR(major))
326 major = gss_duplicate_name(minor, target, &ctx->acceptorName);
327 if (GSS_ERROR(major))
330 if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
331 major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
332 } else if (gssEapIsConcreteMechanismOid(mech)) {
333 if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
334 major = duplicateOid(minor, mech, &ctx->mechanismUsed);
336 major = GSS_S_BAD_MECH;
338 if (GSS_ERROR(major))
341 /* If credentials were provided, check they're usable with this mech */
342 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
343 major = GSS_S_BAD_MECH;
347 respBuf.value = ""; /* emit empty inner token */
348 major = GSS_S_CONTINUE_NEEDED;
351 ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
354 wpabuf_set(&ctx->initiatorCtx.reqData,
355 inputToken->value, inputToken->length);
357 major = GSS_S_CONTINUE_NEEDED;
359 code = eap_peer_sm_step(ctx->initiatorCtx.eap);
360 if (ctx->flags & CTX_FLAG_EAP_RESP) {
363 ctx->flags &= ~(CTX_FLAG_EAP_RESP);
365 resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
367 respBuf.length = wpabuf_len(resp);
368 respBuf.value = (void *)wpabuf_head(resp);
370 } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
371 major = initReady(minor, ctx);
372 if (GSS_ERROR(major))
375 ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
376 major = GSS_S_CONTINUE_NEEDED;
377 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
378 } else if ((ctx->flags & CTX_FLAG_EAP_FAIL) || code == 0) {
379 major = GSS_S_FAILURE;
383 if (respBuf.value != NULL) {
386 assert(major == GSS_S_CONTINUE_NEEDED);
388 tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
389 if (GSS_ERROR(tmpMajor)) {
395 wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
396 peerConfigFree(&tmpMinor, ctx);
403 eapGssSmInitKeyTransport(OM_uint32 *minor,
410 gss_channel_bindings_t chanBindings,
411 gss_buffer_t inputToken,
412 gss_buffer_t outputToken)
414 GSSEAP_NOT_IMPLEMENTED;
418 eapGssSmInitSecureAssoc(OM_uint32 *minor,
425 gss_channel_bindings_t chanBindings,
426 gss_buffer_t inputToken,
427 gss_buffer_t outputToken)
429 GSSEAP_NOT_IMPLEMENTED;
434 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
441 gss_channel_bindings_t chanBindings,
442 gss_buffer_t inputToken,
443 gss_buffer_t outputToken)
445 OM_uint32 major, tmpMinor;
446 gss_iov_buffer_desc iov[2];
449 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
450 iov[0].buffer.length = 0;
451 iov[0].buffer.value = NULL;
453 iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;
454 iov[1].buffer.length = 0;
455 iov[1].buffer.value = NULL;
457 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
458 iov[0].buffer = chanBindings->application_data;
460 major = gssEapWrapOrGetMIC(minor, ctx, FALSE, FALSE, iov, 2,
462 if (GSS_ERROR(major))
465 /* Skip past token ID */
466 assert(iov[1].buffer.length > 2);
467 assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
469 buf.length = iov[1].buffer.length - 2;
470 buf.value = (unsigned char *)iov[1].buffer.value + 2;
472 major = duplicateBuffer(minor, &buf, outputToken);
473 if (GSS_ERROR(major))
476 major = GSS_S_COMPLETE;
477 ctx->state = EAP_STATE_ESTABLISHED;
480 gssEapReleaseIov(iov, 2);
486 eapGssSmInitEstablished(OM_uint32 *minor,
493 gss_channel_bindings_t chanBindings,
494 gss_buffer_t inputToken,
495 gss_buffer_t outputToken)
497 /* Called with already established context */
499 return GSS_S_BAD_STATUS;
502 static struct gss_eap_initiator_sm {
503 enum gss_eap_token_type inputTokenType;
504 enum gss_eap_token_type outputTokenType;
505 OM_uint32 (*processToken)(OM_uint32 *,
512 gss_channel_bindings_t,
515 } eapGssInitiatorSm[] = {
516 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitAuthenticate },
518 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitKeyTransport },
519 { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP, eapGssSmInitSecureAssoc },
521 { TOK_TYPE_NONE, TOK_TYPE_GSS_CB, eapGssSmInitGssChannelBindings },
522 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmInitEstablished },
526 gss_init_sec_context(OM_uint32 *minor,
528 gss_ctx_id_t *context_handle,
529 gss_name_t target_name,
533 gss_channel_bindings_t input_chan_bindings,
534 gss_buffer_t input_token,
535 gss_OID *actual_mech_type,
536 gss_buffer_t output_token,
537 OM_uint32 *ret_flags,
541 OM_uint32 tmpMajor, tmpMinor;
542 gss_ctx_id_t ctx = *context_handle;
543 struct gss_eap_initiator_sm *sm = NULL;
544 gss_buffer_desc innerInputToken;
545 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
549 output_token->length = 0;
550 output_token->value = NULL;
552 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
553 return GSS_S_NO_CRED;
556 if (ctx == GSS_C_NO_CONTEXT) {
557 if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
558 return GSS_S_DEFECTIVE_TOKEN;
561 major = gssEapAllocContext(minor, &ctx);
562 if (GSS_ERROR(major))
565 ctx->flags |= CTX_FLAG_INITIATOR;
567 *context_handle = ctx;
570 GSSEAP_MUTEX_LOCK(&ctx->mutex);
572 sm = &eapGssInitiatorSm[ctx->state];
574 if (input_token != GSS_C_NO_BUFFER) {
575 major = gssEapVerifyToken(minor, ctx, input_token,
576 sm->inputTokenType, &innerInputToken);
577 if (GSS_ERROR(major))
580 innerInputToken.length = 0;
581 innerInputToken.value = NULL;
585 * Advance through state machine whilst empty tokens are emitted and
586 * the status is not GSS_S_COMPLETE or an error status.
589 sm = &eapGssInitiatorSm[ctx->state];
591 major = (sm->processToken)(minor,
601 if (GSS_ERROR(major))
603 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.value == NULL);
605 if (actual_mech_type != NULL) {
606 if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
607 duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
609 if (innerOutputToken.value != NULL) {
610 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
611 sm->outputTokenType, output_token);
612 if (GSS_ERROR(tmpMajor)) {
618 if (ret_flags != NULL)
619 *ret_flags = ctx->gssFlags;
620 if (time_rec != NULL)
621 gss_context_time(&tmpMinor, ctx, time_rec);
623 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
626 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
628 if (GSS_ERROR(major))
629 gssEapReleaseContext(&tmpMinor, context_handle);
631 gss_release_buffer(&tmpMinor, &innerOutputToken);