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/*
Unix SMB/CIFS implementation.
SAM_ACCOUNT local cache for
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2004.
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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_PASSDB
#define LOGIN_CACHE_FILE "login_cache.tdb"
#define SAM_CACHE_FORMAT "dwwd"
static TDB_CONTEXT *cache;
BOOL login_cache_init(void)
{
char* cache_fname = NULL;
/* skip file open if it's already opened */
if (cache) return True;
asprintf(&cache_fname, "%s/%s", lp_lockdir(), LOGIN_CACHE_FILE);
if (cache_fname)
DEBUG(5, ("Opening cache file at %s\n", cache_fname));
else {
DEBUG(0, ("Filename allocation failed.\n"));
return False;
}
cache = tdb_open_log(cache_fname, 0, TDB_DEFAULT,
O_RDWR|O_CREAT, 0644);
if (!cache)
DEBUG(5, ("Attempt to open %s failed.\n", cache_fname));
SAFE_FREE(cache_fname);
return (cache ? True : False);
}
BOOL login_cache_shutdown(void)
{
/* tdb_close routine returns -1 on error */
if (!cache) return False;
DEBUG(5, ("Closing cache file\n"));
return tdb_close(cache) != -1;
}
/* if we can't read the cache, oh well, no need to return anything */
LOGIN_CACHE * login_cache_read(SAM_ACCOUNT *sampass)
{
TDB_DATA keybuf, databuf;
LOGIN_CACHE *entry;
if (!login_cache_init())
return NULL;
keybuf.dptr = SMB_STRDUP(pdb_get_nt_username(sampass));
if (!keybuf.dptr || !strlen(keybuf.dptr)) {
SAFE_FREE(keybuf.dptr);
return NULL;
}
keybuf.dsize = strlen(keybuf.dptr) + 1;
DEBUG(7, ("Looking up login cache for user %s\n",
keybuf.dptr));
databuf = tdb_fetch(cache, keybuf);
SAFE_FREE(keybuf.dptr);
if (!(entry = SMB_MALLOC_P(LOGIN_CACHE))) {
DEBUG(1, ("Unable to allocate cache entry buffer!\n"));
SAFE_FREE(databuf.dptr);
return NULL;
}
if (tdb_unpack (databuf.dptr, databuf.dsize, SAM_CACHE_FORMAT,
&entry->entry_timestamp, &entry->acct_ctrl,
&entry->bad_password_count,
&entry->bad_password_time) == -1) {
DEBUG(7, ("No cache entry found\n"));
SAFE_FREE(entry);
SAFE_FREE(databuf.dptr);
return NULL;
}
SAFE_FREE(databuf.dptr);
DEBUG(5, ("Found login cache entry: timestamp %12u, flags 0x%x, count %d, time %12u\n",
(unsigned int)entry->entry_timestamp, entry->acct_ctrl,
entry->bad_password_count, (unsigned int)entry->bad_password_time));
return entry;
}
BOOL login_cache_write(const SAM_ACCOUNT *sampass, LOGIN_CACHE entry)
{
TDB_DATA keybuf, databuf;
BOOL ret;
if (!login_cache_init())
return False;
keybuf.dptr = SMB_STRDUP(pdb_get_nt_username(sampass));
if (!keybuf.dptr || !strlen(keybuf.dptr)) {
SAFE_FREE(keybuf.dptr);
return False;
}
keybuf.dsize = strlen(keybuf.dptr) + 1;
entry.entry_timestamp = time(NULL);
databuf.dsize =
tdb_pack(NULL, 0, SAM_CACHE_FORMAT,
entry.entry_timestamp,
entry.acct_ctrl,
entry.bad_password_count,
entry.bad_password_time);
databuf.dptr = SMB_MALLOC(databuf.dsize);
if (!databuf.dptr) {
SAFE_FREE(keybuf.dptr);
return False;
}
if (tdb_pack(databuf.dptr, databuf.dsize, SAM_CACHE_FORMAT,
entry.entry_timestamp,
entry.acct_ctrl,
entry.bad_password_count,
entry.bad_password_time)
!= databuf.dsize) {
SAFE_FREE(keybuf.dptr);
SAFE_FREE(databuf.dptr);
return False;
}
ret = tdb_store(cache, keybuf, databuf, 0);
SAFE_FREE(keybuf.dptr);
SAFE_FREE(databuf.dptr);
return ret == 0;
}
BOOL login_cache_delentry(const SAM_ACCOUNT *sampass)
{
int ret;
TDB_DATA keybuf;
if (!login_cache_init())
return False;
keybuf.dptr = SMB_STRDUP(pdb_get_nt_username(sampass));
if (!keybuf.dptr || !strlen(keybuf.dptr)) {
SAFE_FREE(keybuf.dptr);
return False;
}
keybuf.dsize = strlen(keybuf.dptr) + 1;
DEBUG(9, ("About to delete entry for %s\n", keybuf.dptr));
ret = tdb_delete(cache, keybuf);
DEBUG(9, ("tdb_delete returned %d\n", ret));
SAFE_FREE(keybuf.dptr);
return ret == 0;
}
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