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33 #include "gssapiP_eap.h"
38 * Fast reauthentication support for EAP GSS.
42 krb5_encrypt_tkt_part(krb5_context, const krb5_keyblock *, krb5_ticket *);
45 encode_krb5_ticket(const krb5_ticket *rep, krb5_data **code);
47 static krb5_error_code
48 getAcceptorKey(krb5_context krbContext,
51 krb5_principal *princ,
55 krb5_keytab keytab = NULL;
56 krb5_keytab_entry ktent;
57 krb5_kt_cursor cursor = NULL;
60 memset(key, 0, sizeof(*key));
61 memset(&ktent, 0, sizeof(ktent));
63 code = krb5_kt_default(krbContext, &keytab);
67 if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
68 code = krb5_kt_get_entry(krbContext, keytab,
69 cred->name->krbPrincipal, 0,
70 ctx->encryptionType, &ktent);
74 code = krb5_kt_start_seq_get(krbContext, keytab, &cursor);
78 while ((code = krb5_kt_next_entry(krbContext, keytab,
79 &ktent, &cursor)) == 0) {
80 if (ktent.key.enctype == ctx->encryptionType) {
83 krb5_free_keytab_entry_contents(krbContext, &ktent);
89 *princ = ktent.principal;
94 if (cred == GSS_C_NO_CREDENTIAL || cred->name == GSS_C_NO_NAME)
95 krb5_kt_end_seq_get(krbContext, keytab, &cursor);
96 krb5_kt_close(krbContext, keytab);
100 krb5_free_principal(krbContext, *princ);
103 krb5_free_keyblock_contents(krbContext, key),
104 memset(key, 0, sizeof(key));
111 gssEapMakeReauthCreds(OM_uint32 *minor,
114 gss_buffer_t credBuf)
116 OM_uint32 major = GSS_S_COMPLETE;
117 krb5_error_code code;
118 krb5_context krbContext = NULL;
119 krb5_ticket ticket = { 0 };
120 krb5_keyblock session, acceptorKey = { 0 };
121 krb5_enc_tkt_part enc_part = { 0 };
122 gss_buffer_desc attrBuf = GSS_C_EMPTY_BUFFER;
123 krb5_authdata *authData[2], authDatum = { 0 };
124 krb5_data *ticketData = NULL, *credsData = NULL;
125 krb5_creds creds = { 0 };
126 krb5_auth_context authContext = NULL;
129 credBuf->value = NULL;
131 GSSEAP_KRB_INIT(&krbContext);
133 code = getAcceptorKey(krbContext, ctx, cred,
134 &ticket.server, &acceptorKey);
135 if (code == KRB5_KT_NOTFOUND) {
136 gss_buffer_desc emptyToken = { 0, "" };
139 * If we can't produce the KRB-CRED message, we need to
140 * return an empty (not NULL) token to the caller so we
141 * don't change the number of authentication legs.
143 return duplicateBuffer(minor, &emptyToken, credBuf);
144 } else if (code != 0)
147 enc_part.flags = TKT_FLG_INITIAL;
149 code = krb5_c_make_random_key(krbContext, ctx->encryptionType,
154 enc_part.session = &session;
155 enc_part.client = ctx->initiatorName->krbPrincipal;
156 enc_part.times.authtime = time(NULL);
157 enc_part.times.starttime = enc_part.times.authtime;
158 enc_part.times.endtime = ctx->expiryTime
161 enc_part.times.renew_till = 0;
163 major = gssEapExportAttrContext(minor, ctx->initiatorName,
165 if (GSS_ERROR(major))
168 authDatum.ad_type = KRB5_AUTHDATA_RADIUS_AVP;
169 authDatum.length = attrBuf.length;
170 authDatum.contents = attrBuf.value;
171 authData[0] = &authDatum;
173 enc_part.authorization_data = authData;
175 ticket.enc_part2 = &enc_part;
177 code = encode_krb5_ticket(&ticket, &ticketData);
181 code = krb5_encrypt_tkt_part(krbContext, &acceptorKey, &ticket);
185 creds.client = enc_part.client;
186 creds.server = ticket.server;
187 creds.keyblock = session;
188 creds.times = enc_part.times;
189 creds.ticket_flags = enc_part.flags;
190 creds.ticket = *ticketData;
191 creds.authdata = authData;
193 code = krb5_auth_con_init(krbContext, &authContext);
197 code = krb5_auth_con_setflags(krbContext, authContext, 0);
201 code = krb5_auth_con_setsendsubkey(krbContext, authContext, &ctx->rfc3961Key);
205 code = krb5_mk_1cred(krbContext, authContext, &creds, &credsData, NULL);
209 krbDataToGssBuffer(credsData, credBuf);
212 if (ticket.enc_part.ciphertext.data != NULL)
213 GSSEAP_FREE(ticket.enc_part.ciphertext.data);
214 krb5_free_keyblock_contents(krbContext, &session);
215 krb5_free_keyblock_contents(krbContext, &acceptorKey);
216 gss_release_buffer(minor, &attrBuf);
217 krb5_free_data(krbContext, ticketData);
218 krb5_auth_con_free(krbContext, authContext);
219 if (credsData != NULL)
220 GSSEAP_FREE(credsData);
222 if (major == GSS_S_COMPLETE) {
224 major = code != 0 ? GSS_S_FAILURE : GSS_S_COMPLETE;
231 gssEapStoreReauthCreds(OM_uint32 *minor,
234 gss_buffer_t credBuf)
236 OM_uint32 major = GSS_S_COMPLETE, code;
237 krb5_context krbContext = NULL;
238 krb5_auth_context authContext = NULL;
239 krb5_data credData = { 0 };
240 krb5_creds **creds = NULL;
241 krb5_principal canonPrinc;
244 if (credBuf->length == 0 || cred == GSS_C_NO_CREDENTIAL)
245 return GSS_S_COMPLETE;
247 GSSEAP_KRB_INIT(&krbContext);
249 code = krb5_auth_con_init(krbContext, &authContext);
253 code = krb5_auth_con_setflags(krbContext, authContext, 0);
257 code = krb5_auth_con_setrecvsubkey(krbContext, authContext,
262 gssBufferToKrbData(credBuf, &credData);
264 code = krb5_rd_cred(krbContext, authContext, &credData, &creds, NULL);
268 if (creds == NULL || creds[0] == NULL)
271 code = krb5_copy_principal(krbContext, creds[0]->client, &canonPrinc);
274 krb5_free_principal(krbContext, cred->name->krbPrincipal);
275 cred->name->krbPrincipal = canonPrinc;
277 cred->expiryTime = creds[0]->times.endtime;
279 code = krb5_cc_new_unique(krbContext, "MEMORY", NULL, &cred->krbCredCache);
283 code = krb5_cc_initialize(krbContext, cred->krbCredCache, creds[0]->client);
287 code = krb5_cc_store_cred(krbContext, cred->krbCredCache, creds[0]);
291 major = gss_krb5_import_cred(minor, cred->krbCredCache, NULL, NULL, &cred->krbCred);
292 if (GSS_ERROR(major))
298 krb5_auth_con_free(krbContext, authContext);
300 for (i = 0; creds[i] != NULL; i++)
301 krb5_free_creds(krbContext, creds[i]);
303 if (major == GSS_S_COMPLETE)
304 major = *minor ? GSS_S_FAILURE : GSS_S_COMPLETE;
309 static OM_uint32 (*gssInitSecContextNext)(
312 gss_ctx_id_t *context_handle,
313 gss_name_t target_name,
317 gss_channel_bindings_t input_chan_bindings,
318 gss_buffer_t input_token,
319 gss_OID *actual_mech_type,
320 gss_buffer_t output_token,
321 OM_uint32 *ret_flags,
322 OM_uint32 *time_rec);
324 static OM_uint32 (*gssAcceptSecContextNext)(
326 gss_ctx_id_t *context_handle,
328 gss_buffer_t input_token,
329 gss_channel_bindings_t input_chan_bindings,
330 gss_name_t *src_name,
332 gss_buffer_t output_token,
333 OM_uint32 *ret_flags,
335 gss_cred_id_t *delegated_cred_handle);
337 static OM_uint32 (*gssReleaseCredNext)(
339 gss_cred_id_t *cred_handle);
341 static OM_uint32 (*gssReleaseNameNext)(
345 static OM_uint32 (*gssInquireSecContextByOidNext)(
347 const gss_ctx_id_t context_handle,
348 const gss_OID desired_object,
349 gss_buffer_set_t *data_set);
351 static OM_uint32 (*gssDeleteSecContextNext)(
353 gss_ctx_id_t *context_handle,
354 gss_buffer_t output_token);
356 static OM_uint32 (*gssDisplayNameNext)(
359 gss_buffer_t output_name_buffer,
360 gss_OID *output_name_type);
362 static OM_uint32 (*gssImportNameNext)(
366 gss_name_t *outputName);
368 static OM_uint32 (*gssKrbExtractAuthzDataFromSecContextNext)(
370 const gss_ctx_id_t context_handle,
372 gss_buffer_t ad_data);
375 gssEapReauthInitialize(OM_uint32 *minor)
377 gssInitSecContextNext = dlsym(RTLD_NEXT, "gss_init_sec_context");
378 gssAcceptSecContextNext = dlsym(RTLD_NEXT, "gss_accept_sec_context");
379 gssReleaseCredNext = dlsym(RTLD_NEXT, "gss_release_cred");
380 gssReleaseNameNext = dlsym(RTLD_NEXT, "gss_release_name");
381 gssInquireSecContextByOidNext = dlsym(RTLD_NEXT, "gss_inquire_sec_context_by_oid");
382 gssDeleteSecContextNext = dlsym(RTLD_NEXT, "gss_delete_sec_context");
383 gssDisplayNameNext = dlsym(RTLD_NEXT, "gss_display_name");
384 gssImportNameNext = dlsym(RTLD_NEXT, "gss_import_name");
385 gssKrbExtractAuthzDataFromSecContextNext = dlsym(RTLD_NEXT, "gsskrb5_extract_authz_data_from_sec_context");
387 return GSS_S_COMPLETE;
391 gssInitSecContext(OM_uint32 *minor,
393 gss_ctx_id_t *context_handle,
394 gss_name_t target_name,
398 gss_channel_bindings_t input_chan_bindings,
399 gss_buffer_t input_token,
400 gss_OID *actual_mech_type,
401 gss_buffer_t output_token,
402 OM_uint32 *ret_flags,
405 if (gssInitSecContextNext == NULL)
406 return GSS_S_UNAVAILABLE;
408 return gssInitSecContextNext(minor, cred, context_handle,
409 target_name, mech_type, req_flags,
410 time_req, input_chan_bindings,
411 input_token, actual_mech_type,
412 output_token, ret_flags, time_rec);
416 gssAcceptSecContext(OM_uint32 *minor,
417 gss_ctx_id_t *context_handle,
419 gss_buffer_t input_token,
420 gss_channel_bindings_t input_chan_bindings,
421 gss_name_t *src_name,
423 gss_buffer_t output_token,
424 OM_uint32 *ret_flags,
426 gss_cred_id_t *delegated_cred_handle)
428 if (gssAcceptSecContextNext == NULL)
429 return GSS_S_UNAVAILABLE;
431 return gssAcceptSecContextNext(minor, context_handle, cred,
432 input_token, input_chan_bindings,
433 src_name, mech_type, output_token,
434 ret_flags, time_rec, delegated_cred_handle);
438 gssReleaseCred(OM_uint32 *minor,
439 gss_cred_id_t *cred_handle)
441 if (gssReleaseCredNext == NULL)
442 return GSS_S_UNAVAILABLE;
444 return gssReleaseCredNext(minor, cred_handle);
448 gssReleaseName(OM_uint32 *minor,
451 if (gssReleaseName == NULL)
452 return GSS_S_UNAVAILABLE;
454 return gssReleaseNameNext(minor, name);
458 gssDeleteSecContext(OM_uint32 *minor,
459 gss_ctx_id_t *context_handle,
460 gss_buffer_t output_token)
462 if (gssDeleteSecContextNext == NULL)
463 return GSS_S_UNAVAILABLE;
465 return gssDeleteSecContextNext(minor, context_handle, output_token);
469 gssDisplayName(OM_uint32 *minor,
474 if (gssDisplayNameNext == NULL)
475 return GSS_S_UNAVAILABLE;
477 return gssDisplayNameNext(minor, name, buffer, name_type);
481 gssImportName(OM_uint32 *minor,
486 if (gssImportNameNext == NULL)
487 return GSS_S_UNAVAILABLE;
489 return gssImportNameNext(minor, buffer, name_type, name);
493 gssInquireSecContextByOid(OM_uint32 *minor,
494 const gss_ctx_id_t context_handle,
495 const gss_OID desired_object,
496 gss_buffer_set_t *data_set)
498 if (gssInquireSecContextByOidNext == NULL)
499 return GSS_S_UNAVAILABLE;
501 return gssInquireSecContextByOidNext(minor, context_handle,
502 desired_object, data_set);
506 gssKrbExtractAuthzDataFromSecContext(OM_uint32 *minor,
507 const gss_ctx_id_t ctx,
509 gss_buffer_t ad_data)
511 if (gssKrbExtractAuthzDataFromSecContextNext == NULL)
512 return GSS_S_UNAVAILABLE;
514 return gssKrbExtractAuthzDataFromSecContext(minor, ctx, ad_type, ad_data);
518 gssEapGlueToMechName(OM_uint32 *minor,
520 gss_name_t *pMechName)
522 OM_uint32 major, tmpMinor;
523 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
525 *pMechName = GSS_C_NO_NAME;
527 major = gssDisplayName(minor, glueName, &nameBuf, NULL);
528 if (GSS_ERROR(major))
531 major = gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
533 if (GSS_ERROR(major))
537 gss_release_buffer(&tmpMinor, &nameBuf);
543 gssEapMechToGlueName(OM_uint32 *minor,
545 gss_name_t *pGlueName)
547 OM_uint32 major, tmpMinor;
548 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
550 *pGlueName = GSS_C_NO_NAME;
552 major = gssEapDisplayName(minor, mechName, &nameBuf, NULL);
553 if (GSS_ERROR(major))
556 major = gssImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
558 if (GSS_ERROR(major))
562 gss_release_buffer(&tmpMinor, &nameBuf);
568 gssEapReauthComplete(OM_uint32 *minor,
574 OM_uint32 major, tmpMinor;
575 gss_buffer_set_t keyData = GSS_C_NO_BUFFER_SET;
577 if (!oidEqual(mech, gss_mech_krb5)) {
578 major = GSS_S_BAD_MECH;
582 major = gssInquireSecContextByOid(minor, ctx->kerberosCtx,
583 GSS_C_INQ_SSPI_SESSION_KEY, &keyData);
584 if (GSS_ERROR(major))
591 oid.length = keyData->elements[1].length;
592 oid.elements = keyData->elements[1].value;
594 /* GSS_KRB5_SESSION_KEY_ENCTYPE_OID */
595 major = decomposeOid(minor,
596 "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x04",
598 if (GSS_ERROR(major))
601 ctx->encryptionType = suffix;
605 krb5_context krbContext = NULL;
608 GSSEAP_KRB_INIT(&krbContext);
610 KRB_KEY_LENGTH(&key) = keyData->elements[0].length;
611 KRB_KEY_DATA(&key) = keyData->elements[0].value;
612 KRB_KEY_TYPE(&key) = ctx->encryptionType;
614 *minor = krb5_copy_keyblock_contents(krbContext,
615 &key, &ctx->rfc3961Key);
617 major = GSS_S_FAILURE;
622 major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
624 if (GSS_ERROR(major))
627 if (timeRec != GSS_C_INDEFINITE)
628 ctx->expiryTime = time(NULL) + timeRec;
630 major = sequenceInit(minor,
631 &ctx->seqState, ctx->recvSeq,
632 ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
633 ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
635 if (GSS_ERROR(major))
638 ctx->mechanismUsed = GSS_EAP_MECHANISM;
639 major = GSS_S_COMPLETE;
642 gss_release_buffer_set(&tmpMinor, &keyData);