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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 = addAvpFromBuffer(minor, rh, &send, PW_USER_NAME, &nameBuf);
219 if (GSS_ERROR(major))
223 major = addAvpFromBuffer(minor, rh, &send, PW_EAP_MESSAGE, inputToken);
224 if (GSS_ERROR(major))
227 if (ctx->acceptorCtx.lastStatus == PW_ACCESS_CHALLENGE) {
228 major = addAvpFromBuffer(minor, rh, &send, PW_STATE,
229 &ctx->acceptorCtx.state);
230 if (GSS_ERROR(major))
233 gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
236 code = rc_auth(rh, 0, send, &received, msgBuffer);
239 major = GSS_S_UNAVAILABLE;
243 ctx->acceptorCtx.lastStatus = code;
245 if (code == OK_RC || code == PW_ACCESS_CHALLENGE) {
246 major = getBufferFromAvps(minor, received, PW_EAP_MESSAGE, outputToken);
247 if (GSS_ERROR(major))
250 if (code == PW_ACCESS_CHALLENGE) {
251 major = getBufferFromAvps(minor, received, PW_STATE,
252 &ctx->acceptorCtx.state);
253 if (GSS_ERROR(major))
257 major = GSS_S_CONTINUE_NEEDED;
259 major = GSS_S_FAILURE;
264 ctx->acceptorCtx.avps = received;
267 major = acceptReady(minor, ctx);
268 if (GSS_ERROR(major))
271 ctx->state = EAP_STATE_GSS_CHANNEL_BINDINGS;
272 major = GSS_S_CONTINUE_NEEDED;
276 if (received != NULL)
277 rc_avpair_free(received);
283 eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
286 gss_buffer_t inputToken,
287 gss_channel_bindings_t chanBindings,
288 gss_buffer_t outputToken)
291 gss_iov_buffer_desc iov[2];
293 outputToken->length = 0;
294 outputToken->value = NULL;
296 if (chanBindings == GSS_C_NO_CHANNEL_BINDINGS) {
297 ctx->state = EAP_STATE_ESTABLISHED;
298 return GSS_S_COMPLETE;
301 if (inputToken->length < 14) {
302 return GSS_S_DEFECTIVE_TOKEN;
305 iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
306 iov[0].buffer.length = 0;
307 iov[0].buffer.value = NULL;
309 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
310 iov[0].buffer = chanBindings->application_data;
312 iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER;
313 iov[1].buffer.length = 16;
314 iov[1].buffer.value = (unsigned char *)inputToken->value - 2;
316 assert(load_uint16_be(iov[1].buffer.value) == TOK_TYPE_GSS_CB);
318 iov[2].type = GSS_IOV_BUFFER_TYPE_TRAILER;
319 iov[2].buffer.length = inputToken->length - 14;
320 iov[2].buffer.value = (unsigned char *)inputToken->value + 14;
322 major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
323 iov, 3, TOK_TYPE_GSS_CB);
324 if (major == GSS_S_COMPLETE) {
325 ctx->state = EAP_STATE_ESTABLISHED;
329 gss_release_buffer(&tmpMinor, &iov[0].buffer);
336 eapGssSmAcceptEstablished(OM_uint32 *minor,
339 gss_buffer_t inputToken,
340 gss_channel_bindings_t chanBindings,
341 gss_buffer_t outputToken)
343 /* Called with already established context */
345 return GSS_S_BAD_STATUS;
348 static struct gss_eap_acceptor_sm {
349 enum gss_eap_token_type inputTokenType;
350 enum gss_eap_token_type outputTokenType;
351 OM_uint32 (*processToken)(OM_uint32 *,
355 gss_channel_bindings_t,
357 } eapGssAcceptorSm[] = {
358 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptIdentity },
359 { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, eapGssSmAcceptAuthenticate },
360 { TOK_TYPE_GSS_CB, TOK_TYPE_NONE, eapGssSmAcceptGssChannelBindings },
361 { TOK_TYPE_NONE, TOK_TYPE_NONE, eapGssSmAcceptEstablished },
365 gss_accept_sec_context(OM_uint32 *minor,
366 gss_ctx_id_t *context_handle,
368 gss_buffer_t input_token,
369 gss_channel_bindings_t input_chan_bindings,
370 gss_name_t *src_name,
372 gss_buffer_t output_token,
373 OM_uint32 *ret_flags,
375 gss_cred_id_t *delegated_cred_handle)
378 OM_uint32 tmpMajor, tmpMinor;
379 gss_ctx_id_t ctx = *context_handle;
380 struct gss_eap_acceptor_sm *sm = NULL;
381 gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
382 gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
386 output_token->length = 0;
387 output_token->value = NULL;
389 if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_ACCEPT)) {
390 return GSS_S_NO_CRED;
393 if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
394 return GSS_S_DEFECTIVE_TOKEN;
397 if (ctx == GSS_C_NO_CONTEXT) {
398 major = gssEapAllocContext(minor, &ctx);
399 if (GSS_ERROR(major))
402 *context_handle = ctx;
405 GSSEAP_MUTEX_LOCK(&ctx->mutex);
407 sm = &eapGssAcceptorSm[ctx->state];
409 major = gssEapVerifyToken(minor, ctx, input_token,
410 sm->inputTokenType, &innerInputToken);
411 if (GSS_ERROR(major))
414 /* If credentials were provided, check they're usable with this mech */
415 if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
416 major = GSS_S_BAD_MECH;
421 sm = &eapGssAcceptorSm[ctx->state];
423 major = (sm->processToken)(minor,
429 if (GSS_ERROR(major))
431 } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
433 if (mech_type != NULL) {
434 if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
435 duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
437 if (innerOutputToken.length != 0) {
438 tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
439 sm->outputTokenType, output_token);
440 if (GSS_ERROR(tmpMajor)) {
446 if (ret_flags != NULL)
447 *ret_flags = ctx->gssFlags;
448 if (delegated_cred_handle != NULL)
449 *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
451 if (major == GSS_S_COMPLETE) {
452 if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
453 major = gss_duplicate_name(&tmpMinor, ctx->initiatorName, src_name);
454 if (GSS_ERROR(major))
457 if (time_rec != NULL)
458 gss_context_time(&tmpMinor, ctx, time_rec);
461 assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
464 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
466 if (GSS_ERROR(major))
467 gssEapReleaseContext(&tmpMinor, context_handle);
469 gss_release_buffer(&tmpMinor, &innerOutputToken);