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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 VENDOR_ATTR_MS_MPPE_SEND_KEY,
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;
161 krb5_principal krbPrinc;
163 /* Awaits further specification */
164 if (ctx->acceptorName == GSS_C_NO_NAME)
165 return GSS_S_COMPLETE;
167 krbPrinc = ctx->acceptorName->krbPrincipal;
168 assert(krbPrinc != NULL);
170 if (krbPrinc->length < 2)
171 return GSS_S_BAD_NAME;
173 nameBuf.value = krbPrinc->data[0].data;
174 nameBuf.length = krbPrinc->data[0].length;
176 major = addAvpFromBuffer(minor, ctx->acceptorCtx.radHandle, avps,
177 VENDOR_ATTR_GSS_ACCEPTOR_SERVICE_NAME,
180 if (GSS_ERROR(major))
183 nameBuf.value = krbPrinc->data[1].data;
184 nameBuf.length = krbPrinc->data[2].length;
186 major = addAvpFromBuffer(minor, ctx->acceptorCtx.radHandle, avps,
187 VENDOR_ATTR_GSS_ACCEPTOR_HOST_NAME,
190 if (GSS_ERROR(major))
193 if (krbPrinc->realm.data != NULL) {
194 nameBuf.value = krbPrinc->realm.data;
195 nameBuf.length = krbPrinc->realm.length;
197 major = addAvpFromBuffer(minor, ctx->acceptorCtx.radHandle, avps,
198 VENDOR_ATTR_GSS_ACCEPTOR_REALM_NAME,
201 if (GSS_ERROR(major))
205 return GSS_S_COMPLETE;
209 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
212 gss_buffer_t inputToken,
213 gss_channel_bindings_t chanBindings,
214 gss_buffer_t outputToken)
216 OM_uint32 major, tmpMinor;
218 VALUE_PAIR *send = NULL;
219 VALUE_PAIR *received = NULL;
220 rc_handle *rh = ctx->acceptorCtx.radHandle;
221 char msgBuffer[4096];
224 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
226 pdu = (struct eap_hdr *)inputToken->value;
227 pos = (unsigned char *)(pdu + 1);
229 if (inputToken->length > sizeof(*pdu) &&
230 pdu->code == EAP_CODE_RESPONSE &&
231 pos[0] == EAP_TYPE_IDENTITY) {
233 * XXX TODO do we really need to set User-Name? FreeRADIUS does
234 * not appear to require it.
236 major = addAvpFromBuffer(minor, rh, &send, PW_USER_NAME, 0, &nameBuf);
237 if (GSS_ERROR(major))
240 major = setAcceptorIdentity(minor, ctx, &send);
241 if (GSS_ERROR(major))
245 major = addAvpFromBuffer(minor, rh, &send, PW_EAP_MESSAGE, 0, inputToken);
246 if (GSS_ERROR(major))
249 if (ctx->acceptorCtx.lastStatus == CHALLENGE_RC) {
250 major = addAvpFromBuffer(minor, rh, &send, PW_STATE, 0,
251 &ctx->acceptorCtx.state);
252 if (GSS_ERROR(major))
255 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
258 code = rc_auth(rh, 0, send, &received, msgBuffer);
262 major = GSS_S_CONTINUE_NEEDED;
265 major = GSS_S_UNAVAILABLE;
268 major = GSS_S_DEFECTIVE_CREDENTIAL;
271 major = GSS_S_FAILURE;
275 if (GSS_ERROR(major))
278 ctx->acceptorCtx.lastStatus = code;
280 major = getBufferFromAvps(minor, received, PW_EAP_MESSAGE, 0,
282 if ((major == GSS_S_UNAVAILABLE && code != OK_RC) ||
286 if (code == CHALLENGE_RC) {
287 major = getBufferFromAvps(minor, received, PW_STATE, 0,
288 &ctx->acceptorCtx.state, TRUE);
289 if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
292 ctx->acceptorCtx.avps = received;
295 major = acceptReady(minor, ctx, cred);
296 if (GSS_ERROR(major))
299 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
302 major = GSS_S_CONTINUE_NEEDED;
305 if (received != NULL)
306 rc_avpair_free(received);
312 eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
315 gss_buffer_t inputToken,
316 gss_channel_bindings_t chanBindings,
317 gss_buffer_t outputToken)
320 gss_iov_buffer_desc iov[2];
322 outputToken->length = 0;
323 outputToken->value = NULL;
325 if (chanBindings == GSS_C_NO_CHANNEL_BINDINGS) {
326 ctx->state = EAP_STATE_ESTABLISHED;
327 return GSS_S_COMPLETE;
330 if (inputToken->length < 14) {
331 return GSS_S_DEFECTIVE_TOKEN;
334 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
335 iov[0].buffer.length = 0;
336 iov[0].buffer.value = NULL;
338 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
339 iov[0].buffer = chanBindings->application_data;
341 iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER;
342 iov[1].buffer.length = 16;
343 iov[1].buffer.value = (unsigned char *)inputToken->value - 2;
345 assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
347 iov[2].type = GSS_IOV_BUFFER_TYPE_TRAILER;
348 iov[2].buffer.length = inputToken->length - 14;
349 iov[2].buffer.value = (unsigned char *)inputToken->value + 14;
351 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
352 iov, 3, TOK_TYPE_GSS_CB);
353 if (major == GSS_S_COMPLETE) {
354 ctx->state = EAP_STATE_ESTABLISHED;
358 gss_release_buffer(&tmpMinor, &iov[0].buffer);
365 eapGssSmAcceptEstablished(OM_uint32 *minor,
368 gss_buffer_t inputToken,
369 gss_channel_bindings_t chanBindings,
370 gss_buffer_t outputToken)
372 /* Called with already established context */
374 return GSS_S_BAD_STATUS;
377 static struct gss_eap_acceptor_sm {
378 enum gss_eap_token_type inputTokenType;
379 enum gss_eap_token_type outputTokenType;
380 OM_uint32 (*processToken)(OM_uint32 *,
384 gss_channel_bindings_t,
386 } eapGssAcceptorSm[] = {
387 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
388 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
389 { TOK_TYPE_GSS_CB, TOK_TYPE_NONE, eapGssSmAcceptGssChannelBindings },
390 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
394 gss_accept_sec_context(OM_uint32 *minor,
395 gss_ctx_id_t *context_handle,
397 gss_buffer_t input_token,
398 gss_channel_bindings_t input_chan_bindings,
399 gss_name_t *src_name,
401 gss_buffer_t output_token,
402 OM_uint32 *ret_flags,
404 gss_cred_id_t *delegated_cred_handle)
407 OM_uint32 tmpMajor, tmpMinor;
408 gss_ctx_id_t ctx = *context_handle;
409 struct gss_eap_acceptor_sm *sm = NULL;
410 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
411 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
415 output_token->length = 0;
416 output_token->value = NULL;
418 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_ACCEPT)) {
419 return GSS_S_NO_CRED;
422 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
423 return GSS_S_DEFECTIVE_TOKEN;
426 if (ctx == GSS_C_NO_CONTEXT) {
427 major = gssEapAllocContext(minor, &ctx);
428 if (GSS_ERROR(major))
431 *context_handle = ctx;
434 GSSEAP_MUTEX_LOCK(&ctx->mutex);
436 sm = &eapGssAcceptorSm[ctx->state];
438 major = gssEapVerifyToken(minor, ctx, input_token,
439 sm->inputTokenType, &innerInputToken);
440 if (GSS_ERROR(major))
443 /* If credentials were provided, check they're usable with this mech */
444 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
445 major = GSS_S_BAD_MECH;
450 sm = &eapGssAcceptorSm[ctx->state];
452 major = (sm->processToken)(minor,
458 if (GSS_ERROR(major))
460 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
462 if (mech_type != NULL) {
463 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
464 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
466 if (innerOutputToken.length != 0) {
467 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
468 sm->outputTokenType, output_token);
469 if (GSS_ERROR(tmpMajor)) {
475 if (ret_flags != NULL)
476 *ret_flags = ctx->gssFlags;
477 if (delegated_cred_handle != NULL)
478 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
480 if (major == GSS_S_COMPLETE) {
481 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
482 major = gss_duplicate_name(&tmpMinor, ctx->initiatorName, src_name);
483 if (GSS_ERROR(major))
486 if (time_rec != NULL)
487 gss_context_time(&tmpMinor, ctx, time_rec);
490 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
493 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
495 if (GSS_ERROR(major))
496 gssEapReleaseContext(&tmpMinor, context_handle);
498 gss_release_buffer(&tmpMinor, &innerOutputToken);