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/*
Unix SMB/Netbios implementation.
Version 3.0.
Copyright (C) Andrew Tridgell 1992-2001
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.
*/
/* the Samba secrets database stores any generated, private information
such as the local SID and machine trust password */
#include "includes.h"
static TDB_CONTEXT *tdb;
/* open up the secrets database */
BOOL secrets_init(void)
{
pstring fname;
if (tdb)
return True;
pstrcpy(fname, lp_private_dir());
pstrcat(fname,"/secrets.tdb");
tdb = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
if (!tdb) {
DEBUG(0,("Failed to open %s\n", fname));
return False;
}
return True;
}
/* read a entry from the secrets database - the caller must free the result
if size is non-null then the size of the entry is put in there
*/
void *secrets_fetch(char *key, size_t *size)
{
TDB_DATA kbuf, dbuf;
secrets_init();
if (!tdb)
return NULL;
kbuf.dptr = key;
kbuf.dsize = strlen(key);
dbuf = tdb_fetch(tdb, kbuf);
if (size)
*size = dbuf.dsize;
return dbuf.dptr;
}
/* store a secrets entry
*/
BOOL secrets_store(char *key, void *data, size_t size)
{
TDB_DATA kbuf, dbuf;
secrets_init();
if (!tdb)
return False;
kbuf.dptr = key;
kbuf.dsize = strlen(key);
dbuf.dptr = data;
dbuf.dsize = size;
return tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) == 0;
}
/* delete a secets database entry
*/
BOOL secrets_delete(char *key)
{
TDB_DATA kbuf;
secrets_init();
if (!tdb)
return False;
kbuf.dptr = key;
kbuf.dsize = strlen(key);
return tdb_delete(tdb, kbuf) == 0;
}
BOOL secrets_store_domain_sid(char *domain, DOM_SID *sid)
{
fstring key;
slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
return secrets_store(key, sid, sizeof(DOM_SID));
}
BOOL secrets_fetch_domain_sid(char *domain, DOM_SID *sid)
{
DOM_SID *dyn_sid;
fstring key;
size_t size;
slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
dyn_sid = (DOM_SID *)secrets_fetch(key, &size);
if (dyn_sid == NULL)
return False;
if (size != sizeof(DOM_SID))
{
SAFE_FREE(dyn_sid);
return False;
}
*sid = *dyn_sid;
SAFE_FREE(dyn_sid);
return True;
}
/************************************************************************
form a key for fetching a domain trust password
************************************************************************/
char *trust_keystr(char *domain)
{
static fstring keystr;
slprintf(keystr,sizeof(keystr)-1,"%s/%s",
SECRETS_MACHINE_ACCT_PASS, domain);
return keystr;
}
/************************************************************************
Routine to get the trust account password for a domain.
************************************************************************/
BOOL secrets_fetch_trust_account_password(char *domain, uint8 ret_pwd[16],
time_t *pass_last_set_time)
{
struct machine_acct_pass *pass;
char *plaintext;
size_t size;
plaintext = secrets_fetch_machine_password();
if (plaintext) {
/* we have an ADS password - use that */
DEBUG(4,("Using ADS machine password\n"));
E_md4hash((uchar *)plaintext, ret_pwd);
SAFE_FREE(plaintext);
return True;
}
if (!(pass = secrets_fetch(trust_keystr(domain), &size)) ||
size != sizeof(*pass))
return False;
if (pass_last_set_time) *pass_last_set_time = pass->mod_time;
memcpy(ret_pwd, pass->hash, 16);
SAFE_FREE(pass);
return True;
}
/************************************************************************
Routine to set the trust account password for a domain.
************************************************************************/
BOOL secrets_store_trust_account_password(char *domain, uint8 new_pwd[16])
{
struct machine_acct_pass pass;
pass.mod_time = time(NULL);
memcpy(pass.hash, new_pwd, 16);
return secrets_store(trust_keystr(domain), (void *)&pass, sizeof(pass));
}
/************************************************************************
Routine to set the plaintext machine account password for a realm
the password is assumed to be a null terminated ascii string
************************************************************************/
BOOL secrets_store_machine_password(char *pass)
{
return secrets_store(SECRETS_MACHINE_PASSWORD, pass, strlen(pass)+1);
}
/************************************************************************
Routine to fetch the plaintext machine account password for a realm
the password is assumed to be a null terminated ascii string
************************************************************************/
char *secrets_fetch_machine_password(void)
{
return (char *)secrets_fetch(SECRETS_MACHINE_PASSWORD, NULL);
}
/************************************************************************
Routine to delete the trust account password file for a domain.
************************************************************************/
BOOL trust_password_delete(char *domain)
{
return secrets_delete(trust_keystr(domain));
}
/*******************************************************************
Reset the 'done' variables so after a client process is created
from a fork call these calls will be re-done. This should be
expanded if more variables need reseting.
******************************************************************/
void reset_globals_after_fork(void)
{
unsigned char dummy;
secrets_init();
/*
* Increment the global seed value to ensure every smbd starts
* with a new random seed.
*/
if (tdb) {
uint32 initial_val = sys_getpid();
tdb_change_int_atomic(tdb, "INFO/random_seed", (int *)&initial_val, 1);
set_rand_reseed_data((unsigned char *)&initial_val, sizeof(initial_val));
}
/*
* Re-seed the random crypto generator, so all smbd's
* started from the same parent won't generate the same
* sequence.
*/
generate_random_buffer( &dummy, 1, True);
}
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