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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_misc.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "lib/events/events.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/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"
char *samdb_relative_path(struct ldb_context *ldb,
TALLOC_CTX *mem_ctx,
const char *name)
{
const char *base_url =
(const char *)ldb_get_opaque(ldb, "ldb_url");
char *path, *p, *full_name;
if (name == NULL) {
return NULL;
}
if (strncmp("tdb://", base_url, 6) == 0) {
base_url = base_url+6;
}
path = talloc_strdup(mem_ctx, base_url);
if (path == NULL) {
return NULL;
}
if ( (p = strrchr(path, '/')) != NULL) {
p[0] = '\0';
full_name = talloc_asprintf(mem_ctx, "%s/%s", path, name);
} else {
full_name = talloc_asprintf(mem_ctx, "./%s", name);
}
talloc_free(path);
return full_name;
}
/*
make sure the static credentials are not freed
*/
static int samdb_credentials_destructor(struct cli_credentials *creds)
{
return -1;
}
/*
this returns a static set of system credentials. It is static so
that we always get the same pointer in ldb_wrap_connect()
*/
struct cli_credentials *samdb_credentials(struct tevent_context *event_ctx,
struct loadparm_context *lp_ctx)
{
static struct cli_credentials *static_credentials;
struct cli_credentials *cred;
char *error_string;
if (static_credentials) {
return static_credentials;
}
cred = cli_credentials_init(talloc_autofree_context());
if (!cred) {
return NULL;
}
cli_credentials_set_conf(cred, lp_ctx);
/* We don't want to use krb5 to talk to our samdb - recursion
* here would be bad, and this account isn't in the KDC
* anyway */
cli_credentials_set_kerberos_state(cred, CRED_DONT_USE_KERBEROS);
if (!NT_STATUS_IS_OK(cli_credentials_set_secrets(cred, event_ctx, lp_ctx, NULL, NULL,
SECRETS_LDAP_FILTER, &error_string))) {
DEBUG(5, ("(normal if no LDAP backend) %s", error_string));
/* Perfectly OK - if not against an LDAP backend */
talloc_free(cred);
return NULL;
}
static_credentials = cred;
talloc_set_destructor(cred, samdb_credentials_destructor);
return cred;
}
/*
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)
{
struct ldb_context *ldb;
ldb = ldb_wrap_connect(mem_ctx, ev_ctx, lp_ctx,
lpcfg_sam_url(lp_ctx), session_info,
samdb_credentials(ev_ctx, lp_ctx),
0);
if (!ldb) {
return NULL;
}
return ldb;
}
/****************************************************************************
Create the SID list for this user.
****************************************************************************/
NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
struct tevent_context *ev_ctx,
struct loadparm_context *lp_ctx,
struct dom_sid *user_sid,
struct dom_sid *group_sid,
unsigned int n_groupSIDs,
struct dom_sid **groupSIDs,
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->privilege_mask = 0;
ptoken->sids = talloc_array(ptoken, struct dom_sid *, n_groupSIDs + 6 /* over-allocate */);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->num_sids = 1;
ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid *, ptoken->num_sids + 1);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->sids[PRIMARY_USER_SID_INDEX] = talloc_reference(ptoken, user_sid);
if (!dom_sid_equal(user_sid, group_sid)) {
ptoken->sids[PRIMARY_GROUP_SID_INDEX] = talloc_reference(ptoken, group_sid);
ptoken->num_sids++;
}
/*
* Finally add the "standard" SIDs.
* The only difference between guest and "anonymous"
* is the addition of Authenticated_Users.
*/
if (session_info_flags & AUTH_SESSION_INFO_DEFAULT_GROUPS) {
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] = dom_sid_parse_talloc(ptoken->sids, SID_WORLD);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[ptoken->num_sids]);
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] = dom_sid_parse_talloc(ptoken->sids, SID_NT_NETWORK);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[ptoken->num_sids]);
ptoken->num_sids++;
}
if (session_info_flags & AUTH_SESSION_INFO_AUTHENTICATED) {
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] = dom_sid_parse_talloc(ptoken->sids, SID_NT_AUTHENTICATED_USERS);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[ptoken->num_sids]);
ptoken->num_sids++;
}
if (session_info_flags & AUTH_SESSION_INFO_ENTERPRISE_DC) {
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] = dom_sid_parse_talloc(ptoken->sids, SID_NT_ENTERPRISE_DCS);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[ptoken->num_sids]);
ptoken->num_sids++;
}
for (i = 0; i < n_groupSIDs; i++) {
size_t check_sid_idx;
for (check_sid_idx = 1;
check_sid_idx < ptoken->num_sids;
check_sid_idx++) {
if (dom_sid_equal(ptoken->sids[check_sid_idx], groupSIDs[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] = talloc_reference(ptoken->sids, groupSIDs[i]);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[ptoken->num_sids]);
ptoken->num_sids++;
}
}
/* setup the privilege mask for this token */
status = samdb_privilege_setup(ev_ctx, lp_ctx, ptoken);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(ptoken);
return status;
}
security_token_debug(10, ptoken);
*token = ptoken;
return NT_STATUS_OK;
}
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