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"
38 #define DBGC_CLASS DBGC_AUTH
40 _PUBLIC_ struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx,
41 struct loadparm_context *lp_ctx)
44 struct auth_session_info *session_info = NULL;
45 nt_status = auth_anonymous_session_info(mem_ctx, lp_ctx, &session_info);
46 if (!NT_STATUS_IS_OK(nt_status)) {
52 _PUBLIC_ NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx,
53 struct loadparm_context *lp_ctx, /* Optional, if you don't want privilages */
54 struct ldb_context *sam_ctx, /* Optional, if you don't want local groups */
55 struct auth_user_info_dc *user_info_dc,
56 uint32_t session_info_flags,
57 struct auth_session_info **_session_info)
59 struct auth_session_info *session_info;
61 unsigned int i, num_sids = 0;
65 struct auth_SidAttr *sids = NULL;
66 const struct dom_sid *anonymous_sid, *system_sid;
68 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
69 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
71 session_info = talloc_zero(tmp_ctx, struct auth_session_info);
72 if (session_info == NULL) {
74 return NT_STATUS_NO_MEMORY;
77 session_info->info = talloc_reference(session_info, user_info_dc->info);
79 session_info->torture = talloc_zero(session_info, struct auth_user_info_torture);
80 if (session_info->torture == NULL) {
82 return NT_STATUS_NO_MEMORY;
84 session_info->torture->num_dc_sids = user_info_dc->num_sids;
85 session_info->torture->dc_sids = talloc_reference(session_info, user_info_dc->sids);
86 if (session_info->torture->dc_sids == NULL) {
88 return NT_STATUS_NO_MEMORY;
91 /* unless set otherwise, the session key is the user session
92 * key from the auth subsystem */
93 session_info->session_key = data_blob_talloc(session_info, user_info_dc->user_session_key.data, user_info_dc->user_session_key.length);
94 if (!session_info->session_key.data && session_info->session_key.length) {
95 if (session_info->session_key.data == NULL) {
97 return NT_STATUS_NO_MEMORY;
101 anonymous_sid = dom_sid_parse_talloc(tmp_ctx, SID_NT_ANONYMOUS);
102 if (anonymous_sid == NULL) {
103 TALLOC_FREE(tmp_ctx);
104 return NT_STATUS_NO_MEMORY;
107 system_sid = dom_sid_parse_talloc(tmp_ctx, SID_NT_SYSTEM);
108 if (system_sid == NULL) {
109 TALLOC_FREE(tmp_ctx);
110 return NT_STATUS_NO_MEMORY;
113 sids = talloc_array(tmp_ctx, struct auth_SidAttr, user_info_dc->num_sids);
115 TALLOC_FREE(tmp_ctx);
116 return NT_STATUS_NO_MEMORY;
119 num_sids = user_info_dc->num_sids;
121 for (i=0; i < user_info_dc->num_sids; i++) {
122 sids[i] = user_info_dc->sids[i];
126 * Finally add the "standard" sids.
127 * The only difference between guest and "anonymous"
128 * is the addition of Authenticated_Users.
131 if (session_info_flags & AUTH_SESSION_INFO_DEFAULT_GROUPS) {
132 sids = talloc_realloc(tmp_ctx, sids, struct auth_SidAttr, num_sids + 2);
134 TALLOC_FREE(tmp_ctx);
135 return NT_STATUS_NO_MEMORY;
138 sid_copy(&sids[num_sids].sid, &global_sid_World);
139 sids[num_sids].attrs = SE_GROUP_DEFAULT_FLAGS;
142 sid_copy(&sids[num_sids].sid, &global_sid_Network);
143 sids[num_sids].attrs = SE_GROUP_DEFAULT_FLAGS;
147 if (session_info_flags & AUTH_SESSION_INFO_AUTHENTICATED) {
148 sids = talloc_realloc(tmp_ctx, sids, struct auth_SidAttr, num_sids + 1);
150 TALLOC_FREE(tmp_ctx);
151 return NT_STATUS_NO_MEMORY;
154 sid_copy(&sids[num_sids].sid, &global_sid_Authenticated_Users);
155 sids[num_sids].attrs = SE_GROUP_DEFAULT_FLAGS;
159 if (session_info_flags & AUTH_SESSION_INFO_NTLM) {
160 sids = talloc_realloc(tmp_ctx, sids, struct auth_SidAttr, num_sids + 1);
162 TALLOC_FREE(tmp_ctx);
163 return NT_STATUS_NO_MEMORY;
166 if (!dom_sid_parse(SID_NT_NTLM_AUTHENTICATION, &sids[num_sids].sid)) {
167 TALLOC_FREE(tmp_ctx);
168 return NT_STATUS_INTERNAL_ERROR;
170 sids[num_sids].attrs = SE_GROUP_DEFAULT_FLAGS;
175 if (num_sids > PRIMARY_USER_SID_INDEX && dom_sid_equal(anonymous_sid, &sids[PRIMARY_USER_SID_INDEX].sid)) {
176 /* Don't expand nested groups of system, anonymous etc*/
177 } else if (num_sids > PRIMARY_USER_SID_INDEX && dom_sid_equal(system_sid, &sids[PRIMARY_USER_SID_INDEX].sid)) {
178 /* Don't expand nested groups of system, anonymous etc*/
179 } else if (sam_ctx) {
180 filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(groupType:"LDB_OID_COMPARATOR_AND":=%u))",
181 GROUP_TYPE_BUILTIN_LOCAL_GROUP);
183 /* Search for each group in the token */
184 for (i = 0; i < num_sids; i++) {
185 struct dom_sid_buf buf;
189 sid_dn = talloc_asprintf(
192 dom_sid_str_buf(&sids[i].sid, &buf));
193 if (sid_dn == NULL) {
194 TALLOC_FREE(tmp_ctx);
195 return NT_STATUS_NO_MEMORY;
197 sid_blob = data_blob_string_const(sid_dn);
199 /* This function takes in memberOf values and expands
200 * them, as long as they meet the filter - so only
203 * We already have the SID in the token, so set
204 * 'only childs' flag to true */
205 nt_status = dsdb_expand_nested_groups(sam_ctx, &sid_blob, true, filter,
206 tmp_ctx, &sids, &num_sids);
207 if (!NT_STATUS_IS_OK(nt_status)) {
208 talloc_free(tmp_ctx);
214 nt_status = security_token_create(session_info,
219 &session_info->security_token);
220 if (!NT_STATUS_IS_OK(nt_status)) {
221 TALLOC_FREE(tmp_ctx);
225 session_info->unique_session_token = GUID_random();
227 session_info->credentials = NULL;
229 session_info->ticket_type = user_info_dc->ticket_type;
231 talloc_steal(mem_ctx, session_info);
232 *_session_info = session_info;
233 talloc_free(tmp_ctx);
238 /* Fill out the auth_session_info with a cli_credentials based on the
239 * auth_session_info we were forwarded over named pipe forwarding.
241 * NOTE: The stucture members of session_info_transport are stolen
242 * with talloc_move() into auth_session_info for long term use
244 struct auth_session_info *auth_session_info_from_transport(TALLOC_CTX *mem_ctx,
245 struct auth_session_info_transport *session_info_transport,
246 struct loadparm_context *lp_ctx,
249 struct auth_session_info *session_info;
250 session_info = talloc_steal(mem_ctx, session_info_transport->session_info);
252 * This is to allow us to check the type of this pointer using
255 talloc_set_name(session_info, "struct auth_session_info");
256 #ifdef HAVE_GSS_IMPORT_CRED
257 if (session_info_transport->exported_gssapi_credentials.length) {
258 struct cli_credentials *creds;
259 OM_uint32 minor_status;
260 gss_buffer_desc cred_token;
261 gss_cred_id_t cred_handle;
262 const char *error_string;
266 DEBUG(10, ("Delegated credentials supplied by client\n"));
268 cred_token.value = session_info_transport->exported_gssapi_credentials.data;
269 cred_token.length = session_info_transport->exported_gssapi_credentials.length;
271 ret = gss_import_cred(&minor_status,
274 if (ret != GSS_S_COMPLETE) {
275 *reason = "Internal error in gss_import_cred()";
279 creds = cli_credentials_init(session_info);
281 *reason = "Out of memory in cli_credentials_init()";
284 session_info->credentials = creds;
286 ok = cli_credentials_set_conf(creds, lp_ctx);
288 *reason = "Failed to load smb.conf";
292 /* Just so we don't segfault trying to get at a username */
293 cli_credentials_set_anonymous(creds);
295 ret = cli_credentials_set_client_gss_creds(creds,
301 *reason = talloc_asprintf(mem_ctx,
302 "Failed to set pipe forwarded"
303 "creds: %s\n", error_string);
307 /* This credential handle isn't useful for password
308 * authentication, so ensure nobody tries to do that */
309 cli_credentials_set_kerberos_state(creds,
310 CRED_USE_KERBEROS_REQUIRED,
319 /* Create a auth_session_info_transport from an auth_session_info.
321 * NOTE: Members of the auth_session_info_transport structure are
322 * talloc_referenced() into this structure, and should not be changed.
324 NTSTATUS auth_session_info_transport_from_session(TALLOC_CTX *mem_ctx,
325 struct auth_session_info *session_info,
326 struct tevent_context *event_ctx,
327 struct loadparm_context *lp_ctx,
328 struct auth_session_info_transport **transport_out)
331 struct auth_session_info_transport *session_info_transport
332 = talloc_zero(mem_ctx, struct auth_session_info_transport);
333 if (!session_info_transport) {
334 return NT_STATUS_NO_MEMORY;
336 session_info_transport->session_info = talloc_reference(session_info_transport, session_info);
337 if (!session_info_transport->session_info) {
338 return NT_STATUS_NO_MEMORY;
340 #ifdef HAVE_GSS_EXPORT_CRED
341 if (session_info->credentials) {
342 struct gssapi_creds_container *gcc;
344 OM_uint32 minor_status;
345 gss_buffer_desc cred_token;
346 const char *error_string;
349 ret = cli_credentials_get_client_gss_creds(session_info->credentials,
352 &gcc, &error_string);
354 *transport_out = session_info_transport;
358 gret = gss_export_cred(&minor_status,
361 if (gret != GSS_S_COMPLETE) {
362 return NT_STATUS_INTERNAL_ERROR;
365 if (cred_token.length) {
366 session_info_transport->exported_gssapi_credentials
367 = data_blob_talloc(session_info_transport,
370 gss_release_buffer(&minor_status, &cred_token);
371 NT_STATUS_HAVE_NO_MEMORY(session_info_transport->exported_gssapi_credentials.data);
375 *transport_out = session_info_transport;
380 /* Produce a session_info for an arbitary DN or principal in the local
381 * DB, assuming the local DB holds all the groups
383 * Supply either a principal or a DN
385 NTSTATUS authsam_get_session_info_principal(TALLOC_CTX *mem_ctx,
386 struct loadparm_context *lp_ctx,
387 struct ldb_context *sam_ctx,
388 const char *principal,
389 struct ldb_dn *user_dn,
390 uint32_t session_info_flags,
391 struct auth_session_info **session_info)
394 struct auth_user_info_dc *user_info_dc;
395 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
397 return NT_STATUS_NO_MEMORY;
399 nt_status = authsam_get_user_info_dc_principal(tmp_ctx, lp_ctx, sam_ctx,
402 if (!NT_STATUS_IS_OK(nt_status)) {
403 talloc_free(tmp_ctx);
407 nt_status = auth_generate_session_info(tmp_ctx, lp_ctx, sam_ctx,
408 user_info_dc, session_info_flags,
411 if (NT_STATUS_IS_OK(nt_status)) {
412 talloc_steal(mem_ctx, *session_info);
414 talloc_free(tmp_ctx);
419 * prints a struct auth_session_info security token to debug output.
421 void auth_session_info_debug(int dbg_lev,
422 const struct auth_session_info *session_info)
425 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
429 security_token_debug(DBGC_AUTH, dbg_lev,
430 session_info->security_token);