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33 #include "gssapiP_eap.h"
35 #define RC_CONFIG_FILE SYSCONFDIR "/radiusclient/radiusclient.conf"
38 * Mark a context as ready for cryptographic operations
41 acceptReady(OM_uint32 *minor, gss_ctx_id_t ctx)
45 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
47 /* Cache encryption type derived from selected mechanism OID */
48 major = gssEapOidToEnctype(minor, ctx->mechanismUsed,
49 &ctx->encryptionType);
53 vp = rc_avpair_get(ctx->acceptorCtx.avps, PW_USER_NAME, 0);
55 nameBuf.length = vp->lvalue;
56 nameBuf.value = vp->strvalue;
57 } else if (ctx->initiatorName == GSS_C_NO_NAME) {
58 ctx->gssFlags |= GSS_C_ANON_FLAG;
61 if (nameBuf.length != 0 || ctx->initiatorName == GSS_C_NO_NAME) {
62 major = gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
68 vp = rc_avpair_get(ctx->acceptorCtx.avps, PW_MSCHAP2_SUCCESS, 0);
69 if (ctx->encryptionType != ENCTYPE_NULL && vp != NULL) {
70 major = gssEapDeriveRfc3961Key(minor,
71 (unsigned char *)vp->strvalue,
78 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
84 * draft-howlett-eap-gss says that integrity/confidentialty should
85 * always be advertised as available, but if we have no keying
86 * material it seems confusing to the caller to advertise this.
88 ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
91 major = sequenceInit(minor,
92 &ctx->seqState, ctx->recvSeq,
93 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
94 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
99 return GSS_S_COMPLETE;
103 eapGssSmAcceptIdentity(OM_uint32 *minor,
106 gss_buffer_t inputToken,
107 gss_channel_bindings_t chanBindings,
108 gss_buffer_t outputToken)
114 unsigned char data[5];
116 gss_buffer_desc pktBuffer;
117 char *config = RC_CONFIG_FILE;
119 if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0)
120 return GSS_S_DEFECTIVE_TOKEN;
122 assert(ctx->acceptorCtx.radHandle == NULL);
124 if (cred != GSS_C_NO_CREDENTIAL && cred->radiusConfigFile != NULL)
125 config = cred->radiusConfigFile;
127 rh = ctx->acceptorCtx.radHandle = rc_read_config(config);
130 return GSS_S_FAILURE;
133 if (rc_read_dictionary(rh, rc_conf_str(rh, "dictionary")) != 0) {
135 return GSS_S_FAILURE;
138 if (ctx->acceptorName == GSS_C_NO_NAME &&
139 cred != GSS_C_NO_CREDENTIAL &&
140 cred->name != GSS_C_NO_NAME) {
141 major = gss_duplicate_name(minor, cred->name, &ctx->acceptorName);
142 if (GSS_ERROR(major))
146 pkt.pdu.code = EAP_CODE_REQUEST;
147 pkt.pdu.identifier = 0;
148 pkt.pdu.length = htons(sizeof(pkt.data));
149 pkt.data[4] = EAP_TYPE_IDENTITY;
151 pktBuffer.length = sizeof(pkt.data);
152 pktBuffer.value = pkt.data;
154 major = duplicateBuffer(minor, &pktBuffer, outputToken);
155 if (GSS_ERROR(major))
158 ctx->state = EAP_STATE_AUTHENTICATE;
160 return GSS_S_CONTINUE_NEEDED;
164 importInitiatorIdentity(OM_uint32 *minor,
166 gss_buffer_t inputToken,
167 gss_buffer_t nameBuf)
169 OM_uint32 major, tmpMinor;
170 struct eap_hdr *pdu = (struct eap_hdr *)inputToken->value;
171 unsigned char *pos = (unsigned char *)(pdu + 1);
174 assert(pdu->code == EAP_CODE_RESPONSE);
175 assert(pos[0] == EAP_TYPE_IDENTITY);
177 nameBuf->value = pos + 1;
178 nameBuf->length = inputToken->length - sizeof(*pdu) - 1;
180 major = gssEapImportName(minor, nameBuf, GSS_C_NT_USER_NAME, &name);
181 if (GSS_ERROR(major))
184 gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
185 ctx->initiatorName = name;
187 return GSS_S_COMPLETE;
191 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
194 gss_buffer_t inputToken,
195 gss_channel_bindings_t chanBindings,
196 gss_buffer_t outputToken)
198 OM_uint32 major, tmpMinor;
200 VALUE_PAIR *send = NULL;
201 VALUE_PAIR *received = NULL;
202 rc_handle *rh = ctx->acceptorCtx.radHandle;
203 char msgBuffer[4096];
206 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
208 pdu = (struct eap_hdr *)inputToken->value;
209 pos = (unsigned char *)(pdu + 1);
211 if (inputToken->length > sizeof(*pdu) &&
212 pdu->code == EAP_CODE_RESPONSE &&
213 pos[0] == EAP_TYPE_IDENTITY) {
214 major = importInitiatorIdentity(minor, ctx, inputToken, &nameBuf);
215 if (GSS_ERROR(major))
218 major = addRadiusAttributeFromBuffer(minor, rh, &send,
219 PW_USER_NAME, &nameBuf);
220 if (GSS_ERROR(major))
224 major = addRadiusAttributeFromBuffer(minor, rh, &send, PW_EAP_MESSAGE,
226 if (GSS_ERROR(major))
229 if (ctx->acceptorCtx.lastStatus == PW_ACCESS_CHALLENGE) {
230 major = addRadiusAttributeFromBuffer(minor, rh, &send, PW_STATE,
231 &ctx->acceptorCtx.state);
232 if (GSS_ERROR(major))
235 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
238 code = rc_auth(rh, 0, send, &received, msgBuffer);
241 major = GSS_S_UNAVAILABLE;
245 ctx->acceptorCtx.lastStatus = code;
247 if (code == OK_RC || code == PW_ACCESS_CHALLENGE) {
248 major = getBufferFromRadiusAttributes(minor, received, PW_EAP_MESSAGE,
250 if (GSS_ERROR(major))
253 if (code == PW_ACCESS_CHALLENGE) {
254 major = getBufferFromRadiusAttributes(minor, received, PW_STATE,
255 &ctx->acceptorCtx.state);
256 if (GSS_ERROR(major))
260 major = GSS_S_CONTINUE_NEEDED;
262 major = GSS_S_FAILURE;
267 ctx->acceptorCtx.avps = received;
270 major = acceptReady(minor, ctx);
271 if (GSS_ERROR(major))
274 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
275 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);