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Unix SMB/CIFS implementation.
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struct samu local cache for
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Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2004.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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#define DBGC_CLASS DBGC_PASSDB
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#define LOGIN_CACHE_FILE "login_cache.tdb"
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#define SAM_CACHE_FORMAT "dwwd"
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static TDB_CONTEXT *cache;
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bool login_cache_init(void)
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char* cache_fname = NULL;
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/* skip file open if it's already opened */
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if (cache) return True;
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cache_fname = cache_path(LOGIN_CACHE_FILE);
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if (cache_fname == NULL) {
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DEBUG(0, ("Filename allocation failed.\n"));
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DEBUG(5, ("Opening cache file at %s\n", cache_fname));
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cache = tdb_open_log(cache_fname, 0, TDB_DEFAULT,
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O_RDWR|O_CREAT, 0644);
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DEBUG(5, ("Attempt to open %s failed.\n", cache_fname));
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TALLOC_FREE(cache_fname);
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return (cache ? True : False);
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bool login_cache_shutdown(void)
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/* tdb_close routine returns -1 on error */
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if (!cache) return False;
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DEBUG(5, ("Closing cache file\n"));
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return tdb_close(cache) != -1;
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/* if we can't read the cache, oh well, no need to return anything */
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LOGIN_CACHE * login_cache_read(struct samu *sampass)
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uint32_t entry_timestamp = 0, bad_password_time = 0;
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if (!login_cache_init())
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if (pdb_get_nt_username(sampass) == NULL) {
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keystr = SMB_STRDUP(pdb_get_nt_username(sampass));
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if (!keystr || !keystr[0]) {
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DEBUG(7, ("Looking up login cache for user %s\n",
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databuf = tdb_fetch_bystring(cache, keystr);
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if (!(entry = SMB_MALLOC_P(LOGIN_CACHE))) {
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DEBUG(1, ("Unable to allocate cache entry buffer!\n"));
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SAFE_FREE(databuf.dptr);
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if (tdb_unpack (databuf.dptr, databuf.dsize, SAM_CACHE_FORMAT,
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&entry->bad_password_count,
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&bad_password_time) == -1) {
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DEBUG(7, ("No cache entry found\n"));
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SAFE_FREE(databuf.dptr);
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/* Deal with possible 64-bit time_t. */
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entry->entry_timestamp = (time_t)entry_timestamp;
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entry->bad_password_time = (time_t)bad_password_time;
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SAFE_FREE(databuf.dptr);
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DEBUG(5, ("Found login cache entry: timestamp %12u, flags 0x%x, count %d, time %12u\n",
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(unsigned int)entry->entry_timestamp, entry->acct_ctrl,
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entry->bad_password_count, (unsigned int)entry->bad_password_time));
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bool login_cache_write(const struct samu *sampass, LOGIN_CACHE entry)
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uint32_t entry_timestamp;
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uint32_t bad_password_time = (uint32_t)entry.bad_password_time;
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if (!login_cache_init())
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if (pdb_get_nt_username(sampass) == NULL) {
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keystr = SMB_STRDUP(pdb_get_nt_username(sampass));
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if (!keystr || !keystr[0]) {
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entry_timestamp = (uint32_t)time(NULL);
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tdb_pack(NULL, 0, SAM_CACHE_FORMAT,
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entry.bad_password_count,
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databuf.dptr = SMB_MALLOC_ARRAY(uint8, databuf.dsize);
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if (tdb_pack(databuf.dptr, databuf.dsize, SAM_CACHE_FORMAT,
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entry.bad_password_count,
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SAFE_FREE(databuf.dptr);
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ret = tdb_store_bystring(cache, keystr, databuf, 0);
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SAFE_FREE(databuf.dptr);
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bool login_cache_delentry(const struct samu *sampass)
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if (!login_cache_init())
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if (pdb_get_nt_username(sampass) == NULL) {
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keystr = SMB_STRDUP(pdb_get_nt_username(sampass));
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if (!keystr || !keystr[0]) {
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DEBUG(9, ("About to delete entry for %s\n", keystr));
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ret = tdb_delete_bystring(cache, keystr);
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DEBUG(9, ("tdb_delete returned %d\n", ret));