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 dom_sid
*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 dom_sid
, user_info_dc
->num_sids
);
115 TALLOC_FREE(tmp_ctx
);
116 return NT_STATUS_NO_MEMORY
;
119 talloc_free(tmp_ctx
);
120 return NT_STATUS_NO_MEMORY
;
123 num_sids
= user_info_dc
->num_sids
;
125 for (i
=0; i
< user_info_dc
->num_sids
; i
++) {
126 sids
[i
] = user_info_dc
->sids
[i
];
130 * Finally add the "standard" sids.
131 * The only difference between guest and "anonymous"
132 * is the addition of Authenticated_Users.
135 if (session_info_flags
& AUTH_SESSION_INFO_DEFAULT_GROUPS
) {
136 sids
= talloc_realloc(tmp_ctx
, sids
, struct dom_sid
, num_sids
+ 2);
137 NT_STATUS_HAVE_NO_MEMORY(sids
);
139 if (!dom_sid_parse(SID_WORLD
, &sids
[num_sids
])) {
140 return NT_STATUS_INTERNAL_ERROR
;
144 if (!dom_sid_parse(SID_NT_NETWORK
, &sids
[num_sids
])) {
145 return NT_STATUS_INTERNAL_ERROR
;
150 if (session_info_flags
& AUTH_SESSION_INFO_AUTHENTICATED
) {
151 sids
= talloc_realloc(tmp_ctx
, sids
, struct dom_sid
, num_sids
+ 1);
152 NT_STATUS_HAVE_NO_MEMORY(sids
);
154 if (!dom_sid_parse(SID_NT_AUTHENTICATED_USERS
, &sids
[num_sids
])) {
155 return NT_STATUS_INTERNAL_ERROR
;
160 if (session_info_flags
& AUTH_SESSION_INFO_NTLM
) {
161 sids
= talloc_realloc(tmp_ctx
, sids
, struct dom_sid
, num_sids
+ 1);
162 NT_STATUS_HAVE_NO_MEMORY(sids
);
164 if (!dom_sid_parse(SID_NT_NTLM_AUTHENTICATION
, &sids
[num_sids
])) {
165 return NT_STATUS_INTERNAL_ERROR
;
171 if (num_sids
> PRIMARY_USER_SID_INDEX
&& dom_sid_equal(anonymous_sid
, &sids
[PRIMARY_USER_SID_INDEX
])) {
172 /* Don't expand nested groups of system, anonymous etc*/
173 } else if (num_sids
> PRIMARY_USER_SID_INDEX
&& dom_sid_equal(system_sid
, &sids
[PRIMARY_USER_SID_INDEX
])) {
174 /* Don't expand nested groups of system, anonymous etc*/
175 } else if (sam_ctx
) {
176 filter
= talloc_asprintf(tmp_ctx
, "(&(objectClass=group)(groupType:1.2.840.113556.1.4.803:=%u))",
177 GROUP_TYPE_BUILTIN_LOCAL_GROUP
);
179 /* Search for each group in the token */
180 for (i
= 0; i
< num_sids
; i
++) {
185 sid_string
= dom_sid_string(tmp_ctx
,
187 if (sid_string
== NULL
) {
188 TALLOC_FREE(user_info_dc
);
189 return NT_STATUS_NO_MEMORY
;
192 sid_dn
= talloc_asprintf(tmp_ctx
, "<SID=%s>", sid_string
);
193 talloc_free(sid_string
);
194 if (sid_dn
== NULL
) {
195 TALLOC_FREE(user_info_dc
);
196 return NT_STATUS_NO_MEMORY
;
198 sid_blob
= data_blob_string_const(sid_dn
);
200 /* This function takes in memberOf values and expands
201 * them, as long as they meet the filter - so only
204 * We already have the SID in the token, so set
205 * 'only childs' flag to true */
206 nt_status
= dsdb_expand_nested_groups(sam_ctx
, &sid_blob
, true, filter
,
207 tmp_ctx
, &sids
, &num_sids
);
208 if (!NT_STATUS_IS_OK(nt_status
)) {
209 talloc_free(tmp_ctx
);
215 nt_status
= security_token_create(session_info
,
220 &session_info
->security_token
);
221 if (!NT_STATUS_IS_OK(nt_status
)) {
222 TALLOC_FREE(tmp_ctx
);
226 session_info
->unique_session_token
= GUID_random();
228 session_info
->credentials
= NULL
;
230 talloc_steal(mem_ctx
, session_info
);
231 *_session_info
= session_info
;
232 talloc_free(tmp_ctx
);
237 /* Fill out the auth_session_info with a cli_credentials based on the
238 * auth_session_info we were forwarded over named pipe forwarding.
240 * NOTE: The stucture members of session_info_transport are stolen
241 * with talloc_move() into auth_session_info for long term use
243 struct auth_session_info
*auth_session_info_from_transport(TALLOC_CTX
*mem_ctx
,
244 struct auth_session_info_transport
*session_info_transport
,
245 struct loadparm_context
*lp_ctx
,
248 struct auth_session_info
*session_info
;
249 session_info
= talloc_steal(mem_ctx
, session_info_transport
->session_info
);
251 * This is to allow us to check the type of this pointer using
254 talloc_set_name(session_info
, "struct auth_session_info");
255 #ifdef HAVE_GSS_IMPORT_CRED
256 if (session_info_transport
->exported_gssapi_credentials
.length
) {
257 struct cli_credentials
*creds
;
258 OM_uint32 minor_status
;
259 gss_buffer_desc cred_token
;
260 gss_cred_id_t cred_handle
;
261 const char *error_string
;
264 DEBUG(10, ("Delegated credentials supplied by client\n"));
266 cred_token
.value
= session_info_transport
->exported_gssapi_credentials
.data
;
267 cred_token
.length
= session_info_transport
->exported_gssapi_credentials
.length
;
269 ret
= gss_import_cred(&minor_status
,
272 if (ret
!= GSS_S_COMPLETE
) {
273 *reason
= "Internal error in gss_import_cred()";
277 creds
= cli_credentials_init(session_info
);
279 *reason
= "Out of memory in cli_credentials_init()";
282 session_info
->credentials
= creds
;
284 cli_credentials_set_conf(creds
, lp_ctx
);
285 /* Just so we don't segfault trying to get at a username */
286 cli_credentials_set_anonymous(creds
);
288 ret
= cli_credentials_set_client_gss_creds(creds
,
294 *reason
= talloc_asprintf(mem_ctx
,
295 "Failed to set pipe forwarded"
296 "creds: %s\n", error_string
);
300 /* This credential handle isn't useful for password
301 * authentication, so ensure nobody tries to do that */
302 cli_credentials_set_kerberos_state(creds
,
303 CRED_MUST_USE_KERBEROS
);
311 /* Create a auth_session_info_transport from an auth_session_info.
313 * NOTE: Members of the auth_session_info_transport structure are
314 * talloc_referenced() into this structure, and should not be changed.
316 NTSTATUS
auth_session_info_transport_from_session(TALLOC_CTX
*mem_ctx
,
317 struct auth_session_info
*session_info
,
318 struct tevent_context
*event_ctx
,
319 struct loadparm_context
*lp_ctx
,
320 struct auth_session_info_transport
**transport_out
)
323 struct auth_session_info_transport
*session_info_transport
324 = talloc_zero(mem_ctx
, struct auth_session_info_transport
);
325 if (!session_info_transport
) {
326 return NT_STATUS_NO_MEMORY
;
328 session_info_transport
->session_info
= talloc_reference(session_info_transport
, session_info
);
329 if (!session_info_transport
->session_info
) {
330 return NT_STATUS_NO_MEMORY
;
332 #ifdef HAVE_GSS_EXPORT_CRED
333 if (session_info
->credentials
) {
334 struct gssapi_creds_container
*gcc
;
336 OM_uint32 minor_status
;
337 gss_buffer_desc cred_token
;
338 const char *error_string
;
341 ret
= cli_credentials_get_client_gss_creds(session_info
->credentials
,
344 &gcc
, &error_string
);
346 *transport_out
= session_info_transport
;
350 gret
= gss_export_cred(&minor_status
,
353 if (gret
!= GSS_S_COMPLETE
) {
354 return NT_STATUS_INTERNAL_ERROR
;
357 if (cred_token
.length
) {
358 session_info_transport
->exported_gssapi_credentials
359 = data_blob_talloc(session_info_transport
,
362 gss_release_buffer(&minor_status
, &cred_token
);
363 NT_STATUS_HAVE_NO_MEMORY(session_info_transport
->exported_gssapi_credentials
.data
);
367 *transport_out
= session_info_transport
;
372 /* Produce a session_info for an arbitary DN or principal in the local
373 * DB, assuming the local DB holds all the groups
375 * Supply either a principal or a DN
377 NTSTATUS
authsam_get_session_info_principal(TALLOC_CTX
*mem_ctx
,
378 struct loadparm_context
*lp_ctx
,
379 struct ldb_context
*sam_ctx
,
380 const char *principal
,
381 struct ldb_dn
*user_dn
,
382 uint32_t session_info_flags
,
383 struct auth_session_info
**session_info
)
386 struct auth_user_info_dc
*user_info_dc
;
387 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
389 return NT_STATUS_NO_MEMORY
;
391 nt_status
= authsam_get_user_info_dc_principal(tmp_ctx
, lp_ctx
, sam_ctx
,
394 if (!NT_STATUS_IS_OK(nt_status
)) {
395 talloc_free(tmp_ctx
);
399 nt_status
= auth_generate_session_info(tmp_ctx
, lp_ctx
, sam_ctx
,
400 user_info_dc
, session_info_flags
,
403 if (NT_STATUS_IS_OK(nt_status
)) {
404 talloc_steal(mem_ctx
, *session_info
);
406 talloc_free(tmp_ctx
);
411 * prints a struct auth_session_info security token to debug output.
413 void auth_session_info_debug(int dbg_lev
,
414 const struct auth_session_info
*session_info
)
417 DEBUG(dbg_lev
, ("Session Info: (NULL)\n"));
421 security_token_debug(DBGC_AUTH
, dbg_lev
,
422 session_info
->security_token
);