2 Unix SMB/CIFS implementation.
3 Authentication utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Andrew Bartlett 2001-2010
6 Copyright (C) Jeremy Allison 2000-2001
7 Copyright (C) Rafal Szczesniak 2002
8 Copyright (C) Stefan Metzmacher 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "auth/auth.h"
26 #include "auth/auth_sam.h"
27 #include "auth/credentials/credentials.h"
28 #include "auth/credentials/credentials_krb5.h"
29 #include "libcli/security/security.h"
30 #include "libcli/auth/libcli_auth.h"
31 #include "dsdb/samdb/samdb.h"
32 #include "auth/session_proto.h"
33 #include "system/kerberos.h"
34 #include <gssapi/gssapi.h>
35 #include "libcli/wbclient/wbclient.h"
37 _PUBLIC_ struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx,
38 struct loadparm_context *lp_ctx)
41 struct auth_session_info *session_info = NULL;
42 nt_status = auth_anonymous_session_info(mem_ctx, lp_ctx, &session_info);
43 if (!NT_STATUS_IS_OK(nt_status)) {
49 _PUBLIC_ NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx,
50 struct loadparm_context *lp_ctx, /* Optional, if you don't want privilages */
51 struct ldb_context *sam_ctx, /* Optional, if you don't want local groups */
52 struct auth_user_info_dc *user_info_dc,
53 uint32_t session_info_flags,
54 struct auth_session_info **_session_info)
56 struct auth_session_info *session_info;
58 unsigned int i, num_sids = 0;
62 struct dom_sid *sids = NULL;
63 const struct dom_sid *anonymous_sid, *system_sid;
65 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
66 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
68 session_info = talloc_zero(tmp_ctx, struct auth_session_info);
69 if (session_info == NULL) {
71 return NT_STATUS_NO_MEMORY;
74 session_info->info = talloc_reference(session_info, user_info_dc->info);
76 session_info->torture = talloc_zero(session_info, struct auth_user_info_torture);
77 if (session_info->torture == NULL) {
79 return NT_STATUS_NO_MEMORY;
81 session_info->torture->num_dc_sids = user_info_dc->num_sids;
82 session_info->torture->dc_sids = talloc_reference(session_info, user_info_dc->sids);
83 if (session_info->torture->dc_sids == NULL) {
85 return NT_STATUS_NO_MEMORY;
88 /* unless set otherwise, the session key is the user session
89 * key from the auth subsystem */
90 session_info->session_key = data_blob_talloc(session_info, user_info_dc->user_session_key.data, user_info_dc->user_session_key.length);
91 if (!session_info->session_key.data && session_info->session_key.length) {
92 if (session_info->session_key.data == NULL) {
94 return NT_STATUS_NO_MEMORY;
98 anonymous_sid = dom_sid_parse_talloc(tmp_ctx, SID_NT_ANONYMOUS);
99 if (anonymous_sid == NULL) {
100 TALLOC_FREE(tmp_ctx);
101 return NT_STATUS_NO_MEMORY;
104 system_sid = dom_sid_parse_talloc(tmp_ctx, SID_NT_SYSTEM);
105 if (system_sid == NULL) {
106 TALLOC_FREE(tmp_ctx);
107 return NT_STATUS_NO_MEMORY;
110 sids = talloc_array(tmp_ctx, struct dom_sid, user_info_dc->num_sids);
112 TALLOC_FREE(tmp_ctx);
113 return NT_STATUS_NO_MEMORY;
116 talloc_free(tmp_ctx);
117 return NT_STATUS_NO_MEMORY;
120 num_sids = user_info_dc->num_sids;
122 for (i=0; i < user_info_dc->num_sids; i++) {
123 sids[i] = user_info_dc->sids[i];
127 * Finally add the "standard" sids.
128 * The only difference between guest and "anonymous"
129 * is the addition of Authenticated_Users.
132 if (session_info_flags & AUTH_SESSION_INFO_DEFAULT_GROUPS) {
133 sids = talloc_realloc(tmp_ctx, sids, struct dom_sid, num_sids + 2);
134 NT_STATUS_HAVE_NO_MEMORY(sids);
136 if (!dom_sid_parse(SID_WORLD, &sids[num_sids])) {
137 return NT_STATUS_INTERNAL_ERROR;
141 if (!dom_sid_parse(SID_NT_NETWORK, &sids[num_sids])) {
142 return NT_STATUS_INTERNAL_ERROR;
147 if (session_info_flags & AUTH_SESSION_INFO_AUTHENTICATED) {
148 sids = talloc_realloc(tmp_ctx, sids, struct dom_sid, num_sids + 1);
149 NT_STATUS_HAVE_NO_MEMORY(sids);
151 if (!dom_sid_parse(SID_NT_AUTHENTICATED_USERS, &sids[num_sids])) {
152 return NT_STATUS_INTERNAL_ERROR;
157 if (session_info_flags & AUTH_SESSION_INFO_NTLM) {
158 sids = talloc_realloc(tmp_ctx, sids, struct dom_sid, num_sids + 1);
159 NT_STATUS_HAVE_NO_MEMORY(sids);
161 if (!dom_sid_parse(SID_NT_NTLM_AUTHENTICATION, &sids[num_sids])) {
162 return NT_STATUS_INTERNAL_ERROR;
168 if (num_sids > PRIMARY_USER_SID_INDEX && dom_sid_equal(anonymous_sid, &sids[PRIMARY_USER_SID_INDEX])) {
169 /* Don't expand nested groups of system, anonymous etc*/
170 } else if (num_sids > PRIMARY_USER_SID_INDEX && dom_sid_equal(system_sid, &sids[PRIMARY_USER_SID_INDEX])) {
171 /* Don't expand nested groups of system, anonymous etc*/
172 } else if (sam_ctx) {
173 filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(groupType:1.2.840.113556.1.4.803:=%u))",
174 GROUP_TYPE_BUILTIN_LOCAL_GROUP);
176 /* Search for each group in the token */
177 for (i = 0; i < num_sids; i++) {
182 sid_string = dom_sid_string(tmp_ctx,
184 if (sid_string == NULL) {
185 TALLOC_FREE(user_info_dc);
186 return NT_STATUS_NO_MEMORY;
189 sid_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", sid_string);
190 talloc_free(sid_string);
191 if (sid_dn == NULL) {
192 TALLOC_FREE(user_info_dc);
193 return NT_STATUS_NO_MEMORY;
195 sid_blob = data_blob_string_const(sid_dn);
197 /* This function takes in memberOf values and expands
198 * them, as long as they meet the filter - so only
201 * We already have the SID in the token, so set
202 * 'only childs' flag to true */
203 nt_status = dsdb_expand_nested_groups(sam_ctx, &sid_blob, true, filter,
204 tmp_ctx, &sids, &num_sids);
205 if (!NT_STATUS_IS_OK(nt_status)) {
206 talloc_free(tmp_ctx);
212 nt_status = security_token_create(session_info,
217 &session_info->security_token);
218 if (!NT_STATUS_IS_OK(nt_status)) {
219 TALLOC_FREE(tmp_ctx);
223 session_info->unique_session_token = GUID_random();
225 session_info->credentials = NULL;
227 talloc_steal(mem_ctx, session_info);
228 *_session_info = session_info;
229 talloc_free(tmp_ctx);
234 /* Fill out the auth_session_info with a cli_credentials based on the
235 * auth_session_info we were forwarded over named pipe forwarding.
237 * NOTE: The stucture members of session_info_transport are stolen
238 * with talloc_move() into auth_session_info for long term use
240 struct auth_session_info *auth_session_info_from_transport(TALLOC_CTX *mem_ctx,
241 struct auth_session_info_transport *session_info_transport,
242 struct loadparm_context *lp_ctx,
245 struct auth_session_info *session_info;
246 session_info = talloc_steal(mem_ctx, session_info_transport->session_info);
248 * This is to allow us to check the type of this pointer using
251 talloc_set_name(session_info, "struct auth_session_info");
252 #ifdef HAVE_GSS_IMPORT_CRED
253 if (session_info_transport->exported_gssapi_credentials.length) {
254 struct cli_credentials *creds;
255 OM_uint32 minor_status;
256 gss_buffer_desc cred_token;
257 gss_cred_id_t cred_handle;
258 const char *error_string;
261 DEBUG(10, ("Delegated credentials supplied by client\n"));
263 cred_token.value = session_info_transport->exported_gssapi_credentials.data;
264 cred_token.length = session_info_transport->exported_gssapi_credentials.length;
266 ret = gss_import_cred(&minor_status,
269 if (ret != GSS_S_COMPLETE) {
270 *reason = "Internal error in gss_import_cred()";
274 creds = cli_credentials_init(session_info);
276 *reason = "Out of memory in cli_credentials_init()";
279 session_info->credentials = creds;
281 cli_credentials_set_conf(creds, lp_ctx);
282 /* Just so we don't segfault trying to get at a username */
283 cli_credentials_set_anonymous(creds);
285 ret = cli_credentials_set_client_gss_creds(creds,
291 *reason = talloc_asprintf(mem_ctx,
292 "Failed to set pipe forwarded"
293 "creds: %s\n", error_string);
297 /* This credential handle isn't useful for password
298 * authentication, so ensure nobody tries to do that */
299 cli_credentials_set_kerberos_state(creds,
300 CRED_MUST_USE_KERBEROS);
308 /* Create a auth_session_info_transport from an auth_session_info.
310 * NOTE: Members of the auth_session_info_transport structure are
311 * talloc_referenced() into this structure, and should not be changed.
313 NTSTATUS auth_session_info_transport_from_session(TALLOC_CTX *mem_ctx,
314 struct auth_session_info *session_info,
315 struct tevent_context *event_ctx,
316 struct loadparm_context *lp_ctx,
317 struct auth_session_info_transport **transport_out)
320 struct auth_session_info_transport *session_info_transport
321 = talloc_zero(mem_ctx, struct auth_session_info_transport);
322 if (!session_info_transport) {
323 return NT_STATUS_NO_MEMORY;
325 session_info_transport->session_info = talloc_reference(session_info_transport, session_info);
326 if (!session_info_transport->session_info) {
327 return NT_STATUS_NO_MEMORY;
329 #ifdef HAVE_GSS_EXPORT_CRED
330 if (session_info->credentials) {
331 struct gssapi_creds_container *gcc;
333 OM_uint32 minor_status;
334 gss_buffer_desc cred_token;
335 const char *error_string;
338 ret = cli_credentials_get_client_gss_creds(session_info->credentials,
341 &gcc, &error_string);
343 *transport_out = session_info_transport;
347 gret = gss_export_cred(&minor_status,
350 if (gret != GSS_S_COMPLETE) {
351 return NT_STATUS_INTERNAL_ERROR;
354 if (cred_token.length) {
355 session_info_transport->exported_gssapi_credentials
356 = data_blob_talloc(session_info_transport,
359 gss_release_buffer(&minor_status, &cred_token);
360 NT_STATUS_HAVE_NO_MEMORY(session_info_transport->exported_gssapi_credentials.data);
364 *transport_out = session_info_transport;
369 /* Produce a session_info for an arbitary DN or principal in the local
370 * DB, assuming the local DB holds all the groups
372 * Supply either a principal or a DN
374 NTSTATUS authsam_get_session_info_principal(TALLOC_CTX *mem_ctx,
375 struct loadparm_context *lp_ctx,
376 struct ldb_context *sam_ctx,
377 const char *principal,
378 struct ldb_dn *user_dn,
379 uint32_t session_info_flags,
380 struct auth_session_info **session_info)
383 struct auth_user_info_dc *user_info_dc;
384 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
386 return NT_STATUS_NO_MEMORY;
388 nt_status = authsam_get_user_info_dc_principal(tmp_ctx, lp_ctx, sam_ctx,
391 if (!NT_STATUS_IS_OK(nt_status)) {
392 talloc_free(tmp_ctx);
396 nt_status = auth_generate_session_info(tmp_ctx, lp_ctx, sam_ctx,
397 user_info_dc, session_info_flags,
400 if (NT_STATUS_IS_OK(nt_status)) {
401 talloc_steal(mem_ctx, *session_info);
403 talloc_free(tmp_ctx);
408 * prints a struct auth_session_info security token to debug output.
410 void auth_session_info_debug(int dbg_lev,
411 const struct auth_session_info *session_info)
414 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
418 security_token_debug(0, dbg_lev, session_info->security_token);