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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 "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"
/*
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 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, 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,
int flags)
{
struct ldb_context *ldb;
struct dsdb_schema *schema;
const char *url;
struct cli_credentials *credentials;
int ret;
url = lpcfg_sam_url(lp_ctx);
credentials = samdb_credentials(lp_ctx);
ldb = ldb_wrap_find(url, ev_ctx, lp_ctx, session_info, credentials, flags);
if (ldb != NULL)
return talloc_reference(mem_ctx, ldb);
ldb = samba_ldb_init(mem_ctx, ev_ctx, lp_ctx, session_info, credentials);
if (ldb == NULL)
return NULL;
dsdb_set_global_schema(ldb);
ret = samba_ldb_connect(ldb, lp_ctx, url, flags);
if (ret != LDB_SUCCESS) {
talloc_free(ldb);
return NULL;
}
schema = dsdb_get_schema(ldb, NULL);
/* make the resulting schema global */
if (schema) {
dsdb_make_schema_global(ldb, schema);
}
if (!ldb_wrap_add(url, ev_ctx, lp_ctx, session_info, credentials, flags, ldb)) {
talloc_free(ldb);
return NULL;
}
return ldb;
}
/****************************************************************************
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++;
}
}
/*
* 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 + 2);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
if (!dom_sid_parse(SID_WORLD, &ptoken->sids[ptoken->num_sids])) {
return NT_STATUS_INTERNAL_ERROR;
}
ptoken->num_sids++;
if (!dom_sid_parse(SID_NT_NETWORK, &ptoken->sids[ptoken->num_sids])) {
return NT_STATUS_INTERNAL_ERROR;
}
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);
if (!dom_sid_parse(SID_NT_AUTHENTICATED_USERS, &ptoken->sids[ptoken->num_sids])) {
return NT_STATUS_INTERNAL_ERROR;
}
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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