diff options
Diffstat (limited to 'source3/passdb/login_cache.c')
| -rw-r--r-- | source3/passdb/login_cache.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/source3/passdb/login_cache.c b/source3/passdb/login_cache.c new file mode 100644 index 0000000000..8222f77b95 --- /dev/null +++ b/source3/passdb/login_cache.c @@ -0,0 +1,188 @@ +/* + Unix SMB/CIFS implementation. + struct samu 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 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" + +#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(struct samu *sampass) +{ + char *keystr; + TDB_DATA databuf; + LOGIN_CACHE *entry; + + if (!login_cache_init()) + return NULL; + + if (pdb_get_nt_username(sampass) == NULL) { + return NULL; + } + + keystr = SMB_STRDUP(pdb_get_nt_username(sampass)); + if (!keystr || !keystr[0]) { + SAFE_FREE(keystr); + return NULL; + } + + DEBUG(7, ("Looking up login cache for user %s\n", + keystr)); + databuf = tdb_fetch_bystring(cache, keystr); + SAFE_FREE(keystr); + + 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 struct samu *sampass, LOGIN_CACHE entry) +{ + char *keystr; + TDB_DATA databuf; + bool ret; + + if (!login_cache_init()) + return False; + + if (pdb_get_nt_username(sampass) == NULL) { + return False; + } + + keystr = SMB_STRDUP(pdb_get_nt_username(sampass)); + if (!keystr || !keystr[0]) { + SAFE_FREE(keystr); + return False; + } + + 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_ARRAY(uint8, databuf.dsize); + if (!databuf.dptr) { + SAFE_FREE(keystr); + 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(keystr); + SAFE_FREE(databuf.dptr); + return False; + } + + ret = tdb_store_bystring(cache, keystr, databuf, 0); + SAFE_FREE(keystr); + SAFE_FREE(databuf.dptr); + return ret == 0; +} + +bool login_cache_delentry(const struct samu *sampass) +{ + int ret; + char *keystr; + + if (!login_cache_init()) + return False; + + if (pdb_get_nt_username(sampass) == NULL) { + return False; + } + + keystr = SMB_STRDUP(pdb_get_nt_username(sampass)); + if (!keystr || !keystr[0]) { + SAFE_FREE(keystr); + return False; + } + + DEBUG(9, ("About to delete entry for %s\n", keystr)); + ret = tdb_delete_bystring(cache, keystr); + DEBUG(9, ("tdb_delete returned %d\n", ret)); + + SAFE_FREE(keystr); + return ret == 0; +} |