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/*
Unix SMB/CIFS implementation.
interface functions for the sam database
Copyright (C) Andrew Tridgell 2004
Copyright (C) Volker Lendecke 2004
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_netlogon.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "lib/events/events.h"
#include "lib/ldb-samba/ldb_wrap.h"
#include <ldb.h>
#include <ldb_errors.h>
#include "libcli/security/security.h"
#include "libcli/auth/libcli_auth.h"
#include "libcli/ldap/ldap_ndr.h"
#include "system/time.h"
#include "system/filesys.h"
#include "ldb_wrap.h"
#include "../lib/util/util_ldb.h"
#include "dsdb/samdb/samdb.h"
#include "../libds/common/flags.h"
#include "param/param.h"
#include "lib/events/events.h"
#include "auth/credentials/credentials.h"
#include "param/secrets.h"
#include "auth/auth.h"
#include "lib/tsocket/tsocket.h"
/*
connect to the SAM database specified by URL
return an opaque context pointer on success, or NULL on failure
*/
int samdb_connect_url(TALLOC_CTX *mem_ctx,
struct tevent_context *ev_ctx,
struct loadparm_context *lp_ctx,
struct auth_session_info *session_info,
unsigned int flags,
const char *url,
const struct tsocket_address *remote_address,
struct ldb_context **ldb_ret,
char **errstring)
{
struct ldb_context *ldb = NULL;
int ret;
*ldb_ret = NULL;
*errstring = NULL;
/* We create sam.ldb in provision, and never anywhere else */
flags |= LDB_FLG_DONT_CREATE_DB;
if (remote_address == NULL) {
ldb = ldb_wrap_find(url, ev_ctx, lp_ctx,
session_info, NULL, flags);
if (ldb != NULL) {
*ldb_ret = talloc_reference(mem_ctx, ldb);
if (*ldb_ret == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
}
ldb = samba_ldb_init(mem_ctx, ev_ctx, lp_ctx, session_info, NULL);
if (ldb == NULL) {
*errstring = talloc_asprintf(mem_ctx,
"Failed to set up Samba ldb "
"wrappers with samba_ldb_init() "
"to connect to %s",
url);
return LDB_ERR_OPERATIONS_ERROR;
}
dsdb_set_global_schema(ldb);
ret = samba_ldb_connect(ldb, lp_ctx, url, flags);
if (ret != LDB_SUCCESS) {
*errstring = talloc_asprintf(mem_ctx,
"Failed to connect to %s: %s",
url,
ldb_errstring(ldb));
talloc_free(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
/*
* If a remote_address was specified, then set it on the DB
* and do not add to the wrap list (as we need to keep the LDB
* pointer unique for the address).
*
* We use this for audit logging and for the "netlogon" attribute
*/
if (remote_address != NULL) {
ldb_set_opaque(ldb, "remoteAddress",
discard_const(remote_address));
*ldb_ret = ldb;
return LDB_SUCCESS;
}
if (!ldb_wrap_add(url, ev_ctx, lp_ctx, session_info, NULL, flags, ldb)) {
*errstring = talloc_asprintf(mem_ctx,
"Failed to add cached DB reference"
" to %s",
url);
talloc_free(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
*ldb_ret = ldb;
return LDB_SUCCESS;
}
/*
connect to the SAM database
return an opaque context pointer on success, or NULL on failure
*/
struct ldb_context *samdb_connect(TALLOC_CTX *mem_ctx,
struct tevent_context *ev_ctx,
struct loadparm_context *lp_ctx,
struct auth_session_info *session_info,
const struct tsocket_address *remote_address,
unsigned int flags)
{
char *errstring;
struct ldb_context *ldb;
int ret = samdb_connect_url(mem_ctx,
ev_ctx,
lp_ctx,
session_info,
flags,
"sam.ldb",
remote_address,
&ldb,
&errstring);
if (ret == LDB_SUCCESS) {
return ldb;
}
return NULL;
}
/****************************************************************************
Create the SID list for this user.
****************************************************************************/
NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
unsigned int num_sids,
struct dom_sid *sids,
uint32_t session_info_flags,
struct security_token **token)
{
struct security_token *ptoken;
unsigned int i;
NTSTATUS status;
ptoken = security_token_initialise(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(ptoken);
ptoken->sids = talloc_array(ptoken, struct dom_sid, num_sids + 6 /* over-allocate */);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->num_sids = 0;
for (i = 0; i < num_sids; i++) {
size_t check_sid_idx;
for (check_sid_idx = 0;
check_sid_idx < ptoken->num_sids;
check_sid_idx++) {
if (dom_sid_equal(&ptoken->sids[check_sid_idx], &sids[i])) {
break;
}
}
if (check_sid_idx == ptoken->num_sids) {
ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->sids[ptoken->num_sids] = sids[i];
ptoken->num_sids++;
}
}
/* The caller may have requested simple privilages, for example if there isn't a local DB */
if (session_info_flags & AUTH_SESSION_INFO_SIMPLE_PRIVILEGES) {
/* Shortcuts to prevent recursion and avoid lookups */
if (ptoken->sids == NULL) {
ptoken->privilege_mask = 0;
} else if (security_token_is_system(ptoken)) {
ptoken->privilege_mask = ~0;
} else if (security_token_is_anonymous(ptoken)) {
ptoken->privilege_mask = 0;
} else if (security_token_has_builtin_administrators(ptoken)) {
ptoken->privilege_mask = ~0;
} else {
/* All other 'users' get a empty priv set so far */
ptoken->privilege_mask = 0;
}
} else {
/* setup the privilege mask for this token */
status = samdb_privilege_setup(lp_ctx, ptoken);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(ptoken);
DEBUG(1,("Unable to access privileges database\n"));
return status;
}
}
security_token_debug(0, 10, ptoken);
*token = ptoken;
return NT_STATUS_OK;
}
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