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;
159 if (num_sids > PRIMARY_USER_SID_INDEX && dom_sid_equal(anonymous_sid, &sids[PRIMARY_USER_SID_INDEX])) {
160 /* Don't expand nested groups of system, anonymous etc*/
161 } else if (num_sids > PRIMARY_USER_SID_INDEX && dom_sid_equal(system_sid, &sids[PRIMARY_USER_SID_INDEX])) {
162 /* Don't expand nested groups of system, anonymous etc*/
163 } else if (sam_ctx) {
164 filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(groupType:1.2.840.113556.1.4.803:=%u))",
165 GROUP_TYPE_BUILTIN_LOCAL_GROUP);
167 /* Search for each group in the token */
168 for (i = 0; i < num_sids; i++) {
173 sid_string = dom_sid_string(tmp_ctx,
175 if (sid_string == NULL) {
176 TALLOC_FREE(user_info_dc);
177 return NT_STATUS_NO_MEMORY;
180 sid_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", sid_string);
181 talloc_free(sid_string);
182 if (sid_dn == NULL) {
183 TALLOC_FREE(user_info_dc);
184 return NT_STATUS_NO_MEMORY;
186 sid_blob = data_blob_string_const(sid_dn);
188 /* This function takes in memberOf values and expands
189 * them, as long as they meet the filter - so only
192 * We already have the SID in the token, so set
193 * 'only childs' flag to true */
194 nt_status = dsdb_expand_nested_groups(sam_ctx, &sid_blob, true, filter,
195 tmp_ctx, &sids, &num_sids);
196 if (!NT_STATUS_IS_OK(nt_status)) {
197 talloc_free(tmp_ctx);
203 nt_status = security_token_create(session_info,
208 &session_info->security_token);
209 if (!NT_STATUS_IS_OK(nt_status)) {
210 TALLOC_FREE(tmp_ctx);
214 session_info->credentials = NULL;
216 talloc_steal(mem_ctx, session_info);
217 *_session_info = session_info;
218 talloc_free(tmp_ctx);
223 /* Fill out the auth_session_info with a cli_credentials based on the
224 * auth_session_info we were forwarded over named pipe forwarding.
226 * NOTE: The stucture members of session_info_transport are stolen
227 * with talloc_move() into auth_session_info for long term use
229 struct auth_session_info *auth_session_info_from_transport(TALLOC_CTX *mem_ctx,
230 struct auth_session_info_transport *session_info_transport,
231 struct loadparm_context *lp_ctx,
234 struct auth_session_info *session_info;
235 session_info = talloc_steal(mem_ctx, session_info_transport->session_info);
236 #ifdef HAVE_GSS_IMPORT_CRED
237 if (session_info_transport->exported_gssapi_credentials.length) {
238 struct cli_credentials *creds;
239 OM_uint32 minor_status;
240 gss_buffer_desc cred_token;
241 gss_cred_id_t cred_handle;
242 const char *error_string;
245 DEBUG(10, ("Delegated credentials supplied by client\n"));
247 cred_token.value = session_info_transport->exported_gssapi_credentials.data;
248 cred_token.length = session_info_transport->exported_gssapi_credentials.length;
250 ret = gss_import_cred(&minor_status,
253 if (ret != GSS_S_COMPLETE) {
254 *reason = "Internal error in gss_import_cred()";
258 creds = cli_credentials_init(session_info);
260 *reason = "Out of memory in cli_credentials_init()";
263 session_info->credentials = creds;
265 cli_credentials_set_conf(creds, lp_ctx);
266 /* Just so we don't segfault trying to get at a username */
267 cli_credentials_set_anonymous(creds);
269 ret = cli_credentials_set_client_gss_creds(creds,
275 *reason = talloc_asprintf(mem_ctx,
276 "Failed to set pipe forwarded"
277 "creds: %s\n", error_string);
281 /* This credential handle isn't useful for password
282 * authentication, so ensure nobody tries to do that */
283 cli_credentials_set_kerberos_state(creds,
284 CRED_MUST_USE_KERBEROS);
292 /* Create a auth_session_info_transport from an auth_session_info.
294 * NOTE: Members of the auth_session_info_transport structure are
295 * talloc_referenced() into this structure, and should not be changed.
297 NTSTATUS auth_session_info_transport_from_session(TALLOC_CTX *mem_ctx,
298 struct auth_session_info *session_info,
299 struct tevent_context *event_ctx,
300 struct loadparm_context *lp_ctx,
301 struct auth_session_info_transport **transport_out)
304 struct auth_session_info_transport *session_info_transport
305 = talloc_zero(mem_ctx, struct auth_session_info_transport);
306 if (!session_info_transport) {
307 return NT_STATUS_NO_MEMORY;
309 session_info_transport->session_info = talloc_reference(session_info_transport, session_info);
310 if (!session_info_transport->session_info) {
311 return NT_STATUS_NO_MEMORY;
313 #ifdef HAVE_GSS_EXPORT_CRED
314 if (session_info->credentials) {
315 struct gssapi_creds_container *gcc;
317 OM_uint32 minor_status;
318 gss_buffer_desc cred_token;
319 const char *error_string;
322 ret = cli_credentials_get_client_gss_creds(session_info->credentials,
325 &gcc, &error_string);
327 *transport_out = session_info_transport;
331 gret = gss_export_cred(&minor_status,
334 if (gret != GSS_S_COMPLETE) {
335 return NT_STATUS_INTERNAL_ERROR;
338 if (cred_token.length) {
339 session_info_transport->exported_gssapi_credentials
340 = data_blob_talloc(session_info_transport,
343 gss_release_buffer(&minor_status, &cred_token);
344 NT_STATUS_HAVE_NO_MEMORY(session_info_transport->exported_gssapi_credentials.data);
348 *transport_out = session_info_transport;
353 /* Produce a session_info for an arbitary DN or principal in the local
354 * DB, assuming the local DB holds all the groups
356 * Supply either a principal or a DN
358 NTSTATUS authsam_get_session_info_principal(TALLOC_CTX *mem_ctx,
359 struct loadparm_context *lp_ctx,
360 struct ldb_context *sam_ctx,
361 const char *principal,
362 struct ldb_dn *user_dn,
363 uint32_t session_info_flags,
364 struct auth_session_info **session_info)
367 struct auth_user_info_dc *user_info_dc;
368 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
370 return NT_STATUS_NO_MEMORY;
372 nt_status = authsam_get_user_info_dc_principal(tmp_ctx, lp_ctx, sam_ctx,
375 if (!NT_STATUS_IS_OK(nt_status)) {
376 talloc_free(tmp_ctx);
380 nt_status = auth_generate_session_info(tmp_ctx, lp_ctx, sam_ctx,
381 user_info_dc, session_info_flags,
384 if (NT_STATUS_IS_OK(nt_status)) {
385 talloc_steal(mem_ctx, *session_info);
387 talloc_free(tmp_ctx);
392 * prints a struct auth_session_info security token to debug output.
394 void auth_session_info_debug(int dbg_lev,
395 const struct auth_session_info *session_info)
398 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
402 security_token_debug(0, dbg_lev, session_info->security_token);