diff options
Diffstat (limited to 'source3/passdb/login_cache.c')
| -rw-r--r-- | source3/passdb/login_cache.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/source3/passdb/login_cache.c b/source3/passdb/login_cache.c new file mode 100644 index 0000000000..4b760172ec --- /dev/null +++ b/source3/passdb/login_cache.c @@ -0,0 +1,174 @@ +/* + 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 = 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 = malloc(sizeof(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(databuf.dptr); + return NULL; + } + + DEBUG(5, ("Found login cache entry: timestamp %12u, flags 0x%x, count %d, time %12u\n", + entry->entry_timestamp, entry->acct_ctrl, + entry->bad_password_count, entry->bad_password_time)); + return entry; +} + +BOOL login_cache_write(const SAM_ACCOUNT *sampass, LOGIN_CACHE entry) +{ + + TDB_DATA keybuf, databuf; + BOOL ret; + + + keybuf.dptr = 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 = 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 = 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; +} + |