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++) {
181 struct dom_sid_buf buf;
185 sid_dn = talloc_asprintf(
188 dom_sid_str_buf(&sids[i], &buf));
189 if (sid_dn == NULL) {
190 TALLOC_FREE(user_info_dc);
191 return NT_STATUS_NO_MEMORY;
193 sid_blob = data_blob_string_const(sid_dn);
195 /* This function takes in memberOf values and expands
196 * them, as long as they meet the filter - so only
199 * We already have the SID in the token, so set
200 * 'only childs' flag to true */
201 nt_status = dsdb_expand_nested_groups(sam_ctx, &sid_blob, true, filter,
202 tmp_ctx, &sids, &num_sids);
203 if (!NT_STATUS_IS_OK(nt_status)) {
204 talloc_free(tmp_ctx);
210 nt_status = security_token_create(session_info,
215 &session_info->security_token);
216 if (!NT_STATUS_IS_OK(nt_status)) {
217 TALLOC_FREE(tmp_ctx);
221 session_info->unique_session_token = GUID_random();
223 session_info->credentials = NULL;
225 talloc_steal(mem_ctx, session_info);
226 *_session_info = session_info;
227 talloc_free(tmp_ctx);
232 /* Fill out the auth_session_info with a cli_credentials based on the
233 * auth_session_info we were forwarded over named pipe forwarding.
235 * NOTE: The stucture members of session_info_transport are stolen
236 * with talloc_move() into auth_session_info for long term use
238 struct auth_session_info *auth_session_info_from_transport(TALLOC_CTX *mem_ctx,
239 struct auth_session_info_transport *session_info_transport,
240 struct loadparm_context *lp_ctx,
243 struct auth_session_info *session_info;
244 session_info = talloc_steal(mem_ctx, session_info_transport->session_info);
246 * This is to allow us to check the type of this pointer using
249 talloc_set_name(session_info, "struct auth_session_info");
250 #ifdef HAVE_GSS_IMPORT_CRED
251 if (session_info_transport->exported_gssapi_credentials.length) {
252 struct cli_credentials *creds;
253 OM_uint32 minor_status;
254 gss_buffer_desc cred_token;
255 gss_cred_id_t cred_handle;
256 const char *error_string;
259 DEBUG(10, ("Delegated credentials supplied by client\n"));
261 cred_token.value = session_info_transport->exported_gssapi_credentials.data;
262 cred_token.length = session_info_transport->exported_gssapi_credentials.length;
264 ret = gss_import_cred(&minor_status,
267 if (ret != GSS_S_COMPLETE) {
268 *reason = "Internal error in gss_import_cred()";
272 creds = cli_credentials_init(session_info);
274 *reason = "Out of memory in cli_credentials_init()";
277 session_info->credentials = creds;
279 cli_credentials_set_conf(creds, lp_ctx);
280 /* Just so we don't segfault trying to get at a username */
281 cli_credentials_set_anonymous(creds);
283 ret = cli_credentials_set_client_gss_creds(creds,
289 *reason = talloc_asprintf(mem_ctx,
290 "Failed to set pipe forwarded"
291 "creds: %s\n", error_string);
295 /* This credential handle isn't useful for password
296 * authentication, so ensure nobody tries to do that */
297 cli_credentials_set_kerberos_state(creds,
298 CRED_MUST_USE_KERBEROS);
306 /* Create a auth_session_info_transport from an auth_session_info.
308 * NOTE: Members of the auth_session_info_transport structure are
309 * talloc_referenced() into this structure, and should not be changed.
311 NTSTATUS auth_session_info_transport_from_session(TALLOC_CTX *mem_ctx,
312 struct auth_session_info *session_info,
313 struct tevent_context *event_ctx,
314 struct loadparm_context *lp_ctx,
315 struct auth_session_info_transport **transport_out)
318 struct auth_session_info_transport *session_info_transport
319 = talloc_zero(mem_ctx, struct auth_session_info_transport);
320 if (!session_info_transport) {
321 return NT_STATUS_NO_MEMORY;
323 session_info_transport->session_info = talloc_reference(session_info_transport, session_info);
324 if (!session_info_transport->session_info) {
325 return NT_STATUS_NO_MEMORY;
327 #ifdef HAVE_GSS_EXPORT_CRED
328 if (session_info->credentials) {
329 struct gssapi_creds_container *gcc;
331 OM_uint32 minor_status;
332 gss_buffer_desc cred_token;
333 const char *error_string;
336 ret = cli_credentials_get_client_gss_creds(session_info->credentials,
339 &gcc, &error_string);
341 *transport_out = session_info_transport;
345 gret = gss_export_cred(&minor_status,
348 if (gret != GSS_S_COMPLETE) {
349 return NT_STATUS_INTERNAL_ERROR;
352 if (cred_token.length) {
353 session_info_transport->exported_gssapi_credentials
354 = data_blob_talloc(session_info_transport,
357 gss_release_buffer(&minor_status, &cred_token);
358 NT_STATUS_HAVE_NO_MEMORY(session_info_transport->exported_gssapi_credentials.data);
362 *transport_out = session_info_transport;
367 /* Produce a session_info for an arbitary DN or principal in the local
368 * DB, assuming the local DB holds all the groups
370 * Supply either a principal or a DN
372 NTSTATUS authsam_get_session_info_principal(TALLOC_CTX *mem_ctx,
373 struct loadparm_context *lp_ctx,
374 struct ldb_context *sam_ctx,
375 const char *principal,
376 struct ldb_dn *user_dn,
377 uint32_t session_info_flags,
378 struct auth_session_info **session_info)
381 struct auth_user_info_dc *user_info_dc;
382 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
384 return NT_STATUS_NO_MEMORY;
386 nt_status = authsam_get_user_info_dc_principal(tmp_ctx, lp_ctx, sam_ctx,
389 if (!NT_STATUS_IS_OK(nt_status)) {
390 talloc_free(tmp_ctx);
394 nt_status = auth_generate_session_info(tmp_ctx, lp_ctx, sam_ctx,
395 user_info_dc, session_info_flags,
398 if (NT_STATUS_IS_OK(nt_status)) {
399 talloc_steal(mem_ctx, *session_info);
401 talloc_free(tmp_ctx);
406 * prints a struct auth_session_info security token to debug output.
408 void auth_session_info_debug(int dbg_lev,
409 const struct auth_session_info *session_info)
412 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
416 security_token_debug(DBGC_AUTH, dbg_lev,
417 session_info->security_token);