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33 #include "gssapiP_eap.h"
36 * Mark a context as ready for cryptographic operations
39 acceptReady(OM_uint32 *minor, gss_ctx_id_t ctx, gss_cred_id_t cred)
41 OM_uint32 major, tmpMinor;
43 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
45 /* Cache encryption type derived from selected mechanism OID */
46 major = gssEapOidToEnctype(minor, ctx->mechanismUsed,
47 &ctx->encryptionType);
51 gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
53 vp = rc_avpair_get(ctx->acceptorCtx.avps, PW_USER_NAME, 0);
55 nameBuf.length = vp->lvalue;
56 nameBuf.value = vp->strvalue;
58 ctx->gssFlags |= GSS_C_ANON_FLAG;
61 major = gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
66 ctx->initiatorName->attrCtx = gssEapCreateAttrContext(cred, ctx);
68 vp = rc_avpair_get(ctx->acceptorCtx.avps,
69 RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY,
70 RADIUS_VENDOR_ID_MICROSOFT);
71 if (ctx->encryptionType != ENCTYPE_NULL && vp != NULL) {
72 major = gssEapDeriveRfc3961Key(minor,
73 (unsigned char *)vp->strvalue,
80 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
86 * draft-howlett-eap-gss says that integrity/confidentialty should
87 * always be advertised as available, but if we have no keying
88 * material it seems confusing to the caller to advertise this.
90 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
91 ctx->encryptionType = ENCTYPE_NULL;
94 major = sequenceInit(minor,
95 &ctx->seqState, ctx->recvSeq,
96 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
97 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
102 return GSS_S_COMPLETE;
106 eapGssSmAcceptIdentity(OM_uint32 *minor,
109 gss_buffer_t inputToken,
110 gss_channel_bindings_t chanBindings,
111 gss_buffer_t outputToken)
116 unsigned char data[5];
118 gss_buffer_desc pktBuffer;
120 if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0)
121 return GSS_S_DEFECTIVE_TOKEN;
123 assert(ctx->acceptorCtx.radHandle == NULL);
125 major = gssEapRadiusAllocHandle(minor, cred, &ctx->acceptorCtx.radHandle);
126 if (GSS_ERROR(major))
129 assert(ctx->acceptorName == GSS_C_NO_NAME);
131 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
132 major = gss_duplicate_name(minor, cred->name, &ctx->acceptorName);
133 if (GSS_ERROR(major))
137 pkt.pdu.code = EAP_CODE_REQUEST;
138 pkt.pdu.identifier = 0;
139 pkt.pdu.length = htons(sizeof(pkt.data));
140 pkt.data[4] = EAP_TYPE_IDENTITY;
142 pktBuffer.length = sizeof(pkt.data);
143 pktBuffer.value = pkt.data;
145 major = duplicateBuffer(minor, &pktBuffer, outputToken);
146 if (GSS_ERROR(major))
149 ctx->state = EAP_STATE_AUTHENTICATE;
151 return GSS_S_CONTINUE_NEEDED;
155 setAcceptorIdentity(OM_uint32 *minor,
159 OM_uint32 major, tmpMinor;
160 gss_buffer_desc nameBuf;
162 /* Awaits further specification */
163 if (ctx->acceptorName == GSS_C_NO_NAME)
164 return GSS_S_COMPLETE;
166 major = gss_display_name(minor, ctx->acceptorName, &nameBuf, NULL);
167 if (GSS_ERROR(major))
170 major = addAvpFromBuffer(minor, ctx->acceptorCtx.radHandle, avps,
171 RADIUS_VENDOR_ATTR_GSS_EAP_ACCEPTOR_SERVICE_NAME,
172 RADIUS_VENDOR_ID_GSS_EAP,
174 if (GSS_ERROR(major))
177 gss_release_buffer(&tmpMinor, &nameBuf);
183 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
186 gss_buffer_t inputToken,
187 gss_channel_bindings_t chanBindings,
188 gss_buffer_t outputToken)
190 OM_uint32 major, tmpMinor;
192 VALUE_PAIR *send = NULL;
193 VALUE_PAIR *received = NULL;
194 rc_handle *rh = ctx->acceptorCtx.radHandle;
195 char msgBuffer[4096];
198 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
200 pdu = (struct eap_hdr *)inputToken->value;
201 pos = (unsigned char *)(pdu + 1);
203 if (inputToken->length > sizeof(*pdu) &&
204 pdu->code == EAP_CODE_RESPONSE &&
205 pos[0] == EAP_TYPE_IDENTITY) {
207 * XXX TODO do we really need to set User-Name? FreeRADIUS does
208 * not appear to require it.
210 major = addAvpFromBuffer(minor, rh, &send, PW_USER_NAME, 0, &nameBuf);
211 if (GSS_ERROR(major))
214 major = setAcceptorIdentity(minor, ctx, &send);
215 if (GSS_ERROR(major))
219 major = addAvpFromBuffer(minor, rh, &send, PW_EAP_MESSAGE, 0, inputToken);
220 if (GSS_ERROR(major))
223 if (ctx->acceptorCtx.lastStatus == CHALLENGE_RC) {
224 major = addAvpFromBuffer(minor, rh, &send, PW_STATE, 0,
225 &ctx->acceptorCtx.state);
226 if (GSS_ERROR(major))
229 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
232 code = rc_auth(rh, 0, send, &received, msgBuffer);
236 major = GSS_S_CONTINUE_NEEDED;
239 major = GSS_S_UNAVAILABLE;
242 major = GSS_S_DEFECTIVE_CREDENTIAL;
245 major = GSS_S_FAILURE;
249 if (GSS_ERROR(major))
252 ctx->acceptorCtx.lastStatus = code;
254 major = getBufferFromAvps(minor, received, PW_EAP_MESSAGE, 0,
256 if ((major == GSS_S_UNAVAILABLE && code != OK_RC) ||
260 if (code == CHALLENGE_RC) {
261 major = getBufferFromAvps(minor, received, PW_STATE, 0,
262 &ctx->acceptorCtx.state, TRUE);
263 if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
266 ctx->acceptorCtx.avps = received;
269 major = acceptReady(minor, ctx, cred);
270 if (GSS_ERROR(major))
273 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
276 major = GSS_S_CONTINUE_NEEDED;
279 if (received != NULL)
280 rc_avpair_free(received);
286 eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
289 gss_buffer_t inputToken,
290 gss_channel_bindings_t chanBindings,
291 gss_buffer_t outputToken)
294 gss_iov_buffer_desc iov[2];
296 outputToken->length = 0;
297 outputToken->value = NULL;
299 if (chanBindings == GSS_C_NO_CHANNEL_BINDINGS) {
300 ctx->state = EAP_STATE_ESTABLISHED;
301 return GSS_S_COMPLETE;
304 if (inputToken->length < 14) {
305 return GSS_S_DEFECTIVE_TOKEN;
308 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
309 iov[0].buffer.length = 0;
310 iov[0].buffer.value = NULL;
312 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
313 iov[0].buffer = chanBindings->application_data;
315 iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER;
316 iov[1].buffer.length = 16;
317 iov[1].buffer.value = (unsigned char *)inputToken->value - 2;
319 assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
321 iov[2].type = GSS_IOV_BUFFER_TYPE_TRAILER;
322 iov[2].buffer.length = inputToken->length - 14;
323 iov[2].buffer.value = (unsigned char *)inputToken->value + 14;
325 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
326 iov, 3, TOK_TYPE_GSS_CB);
327 if (major == GSS_S_COMPLETE) {
328 ctx->state = EAP_STATE_ESTABLISHED;
332 gss_release_buffer(&tmpMinor, &iov[0].buffer);
339 eapGssSmAcceptEstablished(OM_uint32 *minor,
342 gss_buffer_t inputToken,
343 gss_channel_bindings_t chanBindings,
344 gss_buffer_t outputToken)
346 /* Called with already established context */
348 return GSS_S_BAD_STATUS;
351 static struct gss_eap_acceptor_sm {
352 enum gss_eap_token_type inputTokenType;
353 enum gss_eap_token_type outputTokenType;
354 OM_uint32 (*processToken)(OM_uint32 *,
358 gss_channel_bindings_t,
360 } eapGssAcceptorSm[] = {
361 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
362 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
363 { TOK_TYPE_GSS_CB, TOK_TYPE_NONE, eapGssSmAcceptGssChannelBindings },
364 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
368 gss_accept_sec_context(OM_uint32 *minor,
369 gss_ctx_id_t *context_handle,
371 gss_buffer_t input_token,
372 gss_channel_bindings_t input_chan_bindings,
373 gss_name_t *src_name,
375 gss_buffer_t output_token,
376 OM_uint32 *ret_flags,
378 gss_cred_id_t *delegated_cred_handle)
381 OM_uint32 tmpMajor, tmpMinor;
382 gss_ctx_id_t ctx = *context_handle;
383 struct gss_eap_acceptor_sm *sm = NULL;
384 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
385 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
389 output_token->length = 0;
390 output_token->value = NULL;
392 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_ACCEPT)) {
393 return GSS_S_NO_CRED;
396 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
397 return GSS_S_DEFECTIVE_TOKEN;
400 if (ctx == GSS_C_NO_CONTEXT) {
401 major = gssEapAllocContext(minor, &ctx);
402 if (GSS_ERROR(major))
405 *context_handle = ctx;
408 GSSEAP_MUTEX_LOCK(&ctx->mutex);
410 sm = &eapGssAcceptorSm[ctx->state];
412 major = gssEapVerifyToken(minor, ctx, input_token,
413 sm->inputTokenType, &innerInputToken);
414 if (GSS_ERROR(major))
417 /* If credentials were provided, check they're usable with this mech */
418 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
419 major = GSS_S_BAD_MECH;
424 sm = &eapGssAcceptorSm[ctx->state];
426 major = (sm->processToken)(minor,
432 if (GSS_ERROR(major))
434 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
436 if (mech_type != NULL) {
437 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
438 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
440 if (innerOutputToken.length != 0) {
441 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
442 sm->outputTokenType, output_token);
443 if (GSS_ERROR(tmpMajor)) {
449 if (ret_flags != NULL)
450 *ret_flags = ctx->gssFlags;
451 if (delegated_cred_handle != NULL)
452 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
454 if (major == GSS_S_COMPLETE) {
455 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
456 major = gss_duplicate_name(&tmpMinor, ctx->initiatorName, src_name);
457 if (GSS_ERROR(major))
460 if (time_rec != NULL)
461 gss_context_time(&tmpMinor, ctx, time_rec);
464 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
467 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
469 if (GSS_ERROR(major))
470 gssEapReleaseContext(&tmpMinor, context_handle);
472 gss_release_buffer(&tmpMinor, &innerOutputToken);