--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Net_sam_logon info3 helpers
+ Copyright (C) Alexander Bokovoy 2002.
+ Copyright (C) Andrew Bartlett 2002.
+ Copyright (C) Gerald Carter 2003.
+ Copyright (C) Tim Potter 2003.
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+#define NETSAMLOGON_TDB "netsamlogon_cache.tdb"
+
+static TDB_CONTEXT *netsamlogon_tdb = NULL;
+
+/***********************************************************************
+ open the tdb
+ ***********************************************************************/
+
+BOOL netsamlogon_cache_init(void)
+{
+ if (!netsamlogon_tdb) {
+ netsamlogon_tdb = tdb_open_log(lock_path(NETSAMLOGON_TDB), 0,
+ TDB_DEFAULT, O_RDWR | O_CREAT, 0600);
+ }
+
+ return (netsamlogon_tdb != NULL);
+}
+
+
+/***********************************************************************
+ Shutdown samlogon_cache database
+***********************************************************************/
+
+BOOL netsamlogon_cache_shutdown(void)
+{
+ if(netsamlogon_tdb)
+ return (tdb_close(netsamlogon_tdb) == 0);
+
+ return True;
+}
+
+/***********************************************************************
+ Clear cache getpwnam and getgroups entries from the winbindd cache
+***********************************************************************/
+void netsamlogon_clear_cached_user(TDB_CONTEXT *tdb, NET_USER_INFO_3 *user)
+{
+ fstring domain;
+ TDB_DATA key;
+ BOOL got_tdb = False;
+
+ /* We may need to call this function from smbd which will not have
+ winbindd_cache.tdb open. Open the tdb if a NULL is passed. */
+
+ if (!tdb) {
+ tdb = tdb_open_log(lock_path("winbindd_cache.tdb"), 5000,
+ TDB_DEFAULT, O_RDWR, 0600);
+ if (!tdb) {
+ DEBUG(5, ("netsamlogon_clear_cached_user: failed to open cache\n"));
+ return;
+ }
+ got_tdb = True;
+ }
+
+ unistr2_to_ascii(domain, &user->uni_logon_dom, sizeof(domain) - 1);
+
+ /* Clear U/DOMAIN/RID cache entry */
+
+ asprintf(&key.dptr, "U/%s/%d", domain, user->user_rid);
+ key.dsize = strlen(key.dptr) - 1; /* keys are not NULL terminated */
+
+ DEBUG(10, ("netsamlogon_clear_cached_user: clearing %s\n", key.dptr));
+
+ tdb_delete(tdb, key);
+
+ SAFE_FREE(key.dptr);
+
+ /* Clear UG/DOMAIN/RID cache entry */
+
+ asprintf(&key.dptr, "UG/%s/%d", domain, user->user_rid);
+ key.dsize = strlen(key.dptr) - 1; /* keys are not NULL terminated */
+
+ DEBUG(10, ("netsamlogon_clear_cached_user: clearing %s\n", key.dptr));
+
+ tdb_delete(tdb, key);
+
+ SAFE_FREE(key.dptr);
+
+ if (got_tdb)
+ tdb_close(tdb);
+}
+
+/***********************************************************************
+ Store a NET_USER_INFO_3 structure in a tdb for later user
+ username should be in UTF-8 format
+***********************************************************************/
+
+BOOL netsamlogon_cache_store(TALLOC_CTX *mem_ctx, const char * username, NET_USER_INFO_3 *user)
+{
+ TDB_DATA data;
+ fstring keystr;
+ prs_struct ps;
+ BOOL result = False;
+ DOM_SID user_sid;
+ time_t t = time(NULL);
+
+
+ if (!netsamlogon_cache_init()) {
+ DEBUG(0,("netsamlogon_cache_store: cannot open %s for write!\n", NETSAMLOGON_TDB));
+ return False;
+ }
+
+ sid_copy( &user_sid, &user->dom_sid.sid );
+ sid_append_rid( &user_sid, user->user_rid );
+
+ /* Prepare key as DOMAIN-SID/USER-RID string */
+ slprintf(keystr, sizeof(keystr), "%s", sid_string_static(&user_sid));
+
+ DEBUG(10,("netsamlogon_cache_store: SID [%s]\n", keystr));
+
+ /* only Samba fills in the username, not sure why NT doesn't */
+ /* so we fill it in since winbindd_getpwnam() makes use of it */
+
+ if ( !user->uni_user_name.buffer ) {
+ init_unistr2( &user->uni_user_name, username, UNI_STR_TERMINATE );
+ init_uni_hdr( &user->hdr_user_name, &user->uni_user_name );
+ }
+
+ /* Prepare data */
+
+ prs_init( &ps, RPC_MAX_PDU_FRAG_LEN, mem_ctx, MARSHALL);
+
+ if ( !prs_uint32( "timestamp", &ps, 0, (uint32*)&t ) )
+ return False;
+
+ if ( net_io_user_info3("", user, &ps, 0, 3, 0) )
+ {
+ data.dsize = prs_offset( &ps );
+ data.dptr = prs_data_p( &ps );
+
+ if (tdb_store_bystring(netsamlogon_tdb, keystr, data, TDB_REPLACE) != -1)
+ result = True;
+
+ prs_mem_free( &ps );
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ Retrieves a NET_USER_INFO_3 structure from a tdb. Caller must
+ free the user_info struct (malloc()'d memory)
+***********************************************************************/
+
+NET_USER_INFO_3* netsamlogon_cache_get( TALLOC_CTX *mem_ctx, const DOM_SID *user_sid)
+{
+ NET_USER_INFO_3 *user = NULL;
+ TDB_DATA data, key;
+ prs_struct ps;
+ fstring keystr;
+ uint32 t;
+
+ if (!netsamlogon_cache_init()) {
+ DEBUG(0,("netsamlogon_cache_store: cannot open %s for write!\n", NETSAMLOGON_TDB));
+ return False;
+ }
+
+ /* Prepare key as DOMAIN-SID/USER-RID string */
+ slprintf(keystr, sizeof(keystr), "%s", sid_string_static(user_sid));
+ DEBUG(10,("netsamlogon_cache_get: SID [%s]\n", keystr));
+ key.dptr = keystr;
+ key.dsize = strlen(keystr)+1;
+ data = tdb_fetch( netsamlogon_tdb, key );
+
+ if ( data.dptr ) {
+
+ if ( (user = SMB_MALLOC_P(NET_USER_INFO_3)) == NULL )
+ return NULL;
+
+ prs_init( &ps, 0, mem_ctx, UNMARSHALL );
+ prs_give_memory( &ps, data.dptr, data.dsize, True );
+
+ if ( !prs_uint32( "timestamp", &ps, 0, &t ) ) {
+ prs_mem_free( &ps );
+ return False;
+ }
+
+ if ( !net_io_user_info3("", user, &ps, 0, 3, 0) ) {
+ SAFE_FREE( user );
+ }
+
+ prs_mem_free( &ps );
+
+#if 0 /* The netsamlogon cache needs to hang around. Something about
+ this feels wrong, but it is the only way we can get all of the
+ groups. The old universal groups cache didn't expire either.
+ --jerry */
+ {
+ time_t now = time(NULL);
+ uint32 time_diff;
+
+ /* is the entry expired? */
+ time_diff = now - t;
+
+ if ( (time_diff < 0 ) || (time_diff > lp_winbind_cache_time()) ) {
+ DEBUG(10,("netsamlogon_cache_get: cache entry expired \n"));
+ tdb_delete( netsamlogon_tdb, key );
+ SAFE_FREE( user );
+ }
+#endif
+ }
+
+ return user;
+}
+
+BOOL netsamlogon_cache_have(const DOM_SID *user_sid)
+{
+ TALLOC_CTX *mem_ctx = talloc_init("netsamlogon_cache_have");
+ NET_USER_INFO_3 *user = NULL;
+ BOOL result;
+
+ if (!mem_ctx)
+ return False;
+
+ user = netsamlogon_cache_get(mem_ctx, user_sid);
+
+ result = (user != NULL);
+
+ talloc_destroy(mem_ctx);
+ SAFE_FREE(user);
+
+ return result;
+}
centry = wcache_fetch(cache, domain, "U/%s", sid_string_static(user_sid));
+ /* If we have an access denied cache entry and a cached info3 in the
+ samlogon cache then do a query. This will force the rpc back end
+ to return the info3 data. */
+
+ if (NT_STATUS_V(domain->last_status) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) &&
+ netsamlogon_cache_have(user_sid)) {
+ DEBUG(10, ("query_user: cached access denied and have cached info3\n"));
+ domain->last_status = NT_STATUS_OK;
+ centry_free(centry);
+ goto do_query;
+ }
+
if (!centry)
goto do_query;
centry = wcache_fetch(cache, domain, "UG/%s", sid_to_string(sid_string, user_sid));
+ /* If we have an access denied cache entry and a cached info3 in the
+ samlogon cache then do a query. This will force the rpc back end
+ to return the info3 data. */
+
+ if (NT_STATUS_V(domain->last_status) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) &&
+ netsamlogon_cache_have(user_sid)) {
+ DEBUG(10, ("query_user: cached access denied and have cached info3\n"));
+ domain->last_status = NT_STATUS_OK;
+ centry_free(centry);
+ goto do_query;
+ }
+
if (!centry)
goto do_query;
return 0;
}
+/* Invalidate the getpwnam and getgroups entries for a winbindd domain */
+
+void wcache_invalidate_samlogon(struct winbindd_domain *domain,
+ NET_USER_INFO_3 *info3)
+{
+ struct winbind_cache *cache;
+
+ if (!domain)
+ return;
+
+ cache = get_cache(domain);
+ netsamlogon_clear_cached_user(cache->tdb, info3);
+}
+
void wcache_invalidate_cache(void)
{
struct winbindd_domain *domain;
SAM_USERINFO_CTR *ctr;
fstring sid_string;
uint32 user_rid;
+ NET_USER_INFO_3 *user;
struct rpc_pipe_client *cli;
DEBUG(3,("rpc: query_user rid=%s\n",
if (!sid_peek_check_rid(&domain->sid, user_sid, &user_rid))
return NT_STATUS_UNSUCCESSFUL;
+ /* try netsamlogon cache first */
+
+ if ( (user = netsamlogon_cache_get( mem_ctx, user_sid )) != NULL )
+ {
+
+ DEBUG(5,("query_user: Cache lookup succeeded for %s\n",
+ sid_string_static(user_sid)));
+
+ sid_compose(&user_info->user_sid, &domain->sid, user_rid);
+ sid_compose(&user_info->group_sid, &domain->sid,
+ user->group_rid);
+
+ user_info->acct_name = unistr2_tdup(mem_ctx,
+ &user->uni_user_name);
+ user_info->full_name = unistr2_tdup(mem_ctx,
+ &user->uni_full_name);
+
+ user_info->homedir = NULL;
+ user_info->shell = NULL;
+
+ SAFE_FREE(user);
+
+ return NT_STATUS_OK;
+ }
+
+ /* no cache; hit the wire */
+
result = cm_connect_sam(domain, mem_ctx, &cli, &dom_pol);
if (!NT_STATUS_IS_OK(result))
return result;
unsigned int i;
fstring sid_string;
uint32 user_rid;
+ NET_USER_INFO_3 *user;
struct rpc_pipe_client *cli;
DEBUG(3,("rpc: lookup_usergroups sid=%s\n",
*num_groups = 0;
*user_grpsids = NULL;
+
+ /* so lets see if we have a cached user_info_3 */
+
+ if ( (user = netsamlogon_cache_get( mem_ctx, user_sid )) != NULL )
+ {
+ DEBUG(5,("query_user: Cache lookup succeeded for %s\n",
+ sid_string_static(user_sid)));
+
+ *num_groups = user->num_groups;
+
+ (*user_grpsids) = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_groups);
+ for (i=0;i<(*num_groups);i++) {
+ sid_copy(&((*user_grpsids)[i]), &domain->sid);
+ sid_append_rid(&((*user_grpsids)[i]),
+ user->gids[i].g_rid);
+ }
+
+ SAFE_FREE(user);
+
+ return NT_STATUS_OK;
+ }
+
+ /* no cache; hit the wire */
result = cm_connect_sam(domain, mem_ctx, &cli, &dom_pol);
if (!NT_STATUS_IS_OK(result))
git.samba.org / vlendec / samba-autobuild / .git / commitdiff