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samba-mirror/lib/param/util.c
Volker Lendecke 3b8cfda1c9 lib: Avoid a tdb handle leak
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2023-09-25 19:01:34 +00:00

341 lines
8.2 KiB
C

/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 2001-2002
Copyright (C) Simo Sorce 2001
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
Copyright (C) James J Myers 2003
Copyright (C) Jelmer Vernooij 2005-2007
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"
#include "dynconfig/dynconfig.h"
#include "system/network.h"
#include "system/filesys.h"
#include "system/dir.h"
#include "param/param.h"
#include "libds/common/roles.h"
#include "tdb.h"
/**
* @file
* @brief Misc utility functions
*/
bool lpcfg_is_mydomain(struct loadparm_context *lp_ctx,
const char *domain)
{
return strequal(lpcfg_workgroup(lp_ctx), domain);
}
bool lpcfg_is_my_domain_or_realm(struct loadparm_context *lp_ctx,
const char *domain)
{
return strequal(lpcfg_workgroup(lp_ctx), domain) ||
strequal(lpcfg_realm(lp_ctx), domain);
}
/**
see if a string matches either our primary or one of our secondary
netbios aliases. do a case insensitive match
*/
bool lpcfg_is_myname(struct loadparm_context *lp_ctx, const char *name)
{
const char **aliases;
int i;
if (strcasecmp_m(name, lpcfg_netbios_name(lp_ctx)) == 0) {
return true;
}
aliases = lpcfg_netbios_aliases(lp_ctx);
for (i=0; aliases && aliases[i]; i++) {
if (strcasecmp_m(name, aliases[i]) == 0) {
return true;
}
}
return false;
}
static char *lpcfg_common_path(TALLOC_CTX* mem_ctx,
const char *parent,
const char *name)
{
char *fname, *dname;
bool ok;
if (name == NULL) {
return NULL;
}
if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
return talloc_strdup(mem_ctx, name);
}
dname = talloc_strdup(mem_ctx, parent);
if (dname == NULL) {
return NULL;
}
trim_string(dname,"","/");
ok = directory_create_or_exist(dname, 0755);
if (!ok) {
DEBUG(1, ("Unable to create directory %s for file %s. "
"Error was %s\n", dname, name, strerror(errno)));
return NULL;
}
fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
if (fname == NULL) {
return dname;
}
talloc_free(dname);
return fname;
}
/**
A useful function for returning a path in the Samba lock directory.
**/
char *lpcfg_lock_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
const char *name)
{
return lpcfg_common_path(mem_ctx, lpcfg_lock_directory(lp_ctx), name);
}
/**
A useful function for returning a path in the Samba state directory.
**/
char *lpcfg_state_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
const char *name)
{
return lpcfg_common_path(mem_ctx, lpcfg_state_directory(lp_ctx), name);
}
/**
A useful function for returning a path in the Samba cache directory.
**/
char *lpcfg_cache_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
const char *name)
{
return lpcfg_common_path(mem_ctx, lpcfg_cache_directory(lp_ctx), name);
}
/**
* @brief Returns an absolute path to a file in the directory containing the current config file
*
* @param name File to find, relative to the config file directory.
*
* @retval Pointer to a talloc'ed string containing the full path.
**/
char *lpcfg_config_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
const char *name)
{
char *fname, *config_dir, *p;
config_dir = talloc_strdup(mem_ctx, lpcfg_configfile(lp_ctx));
if (config_dir == NULL) {
config_dir = talloc_strdup(mem_ctx, lp_default_path());
}
p = strrchr(config_dir, '/');
if (p == NULL) {
talloc_free(config_dir);
config_dir = talloc_strdup(mem_ctx, ".");
if (config_dir == NULL) {
return NULL;
}
} else {
p[0] = '\0';
}
fname = talloc_asprintf(mem_ctx, "%s/%s", config_dir, name);
talloc_free(config_dir);
return fname;
}
/**
* @brief Returns an absolute path to a file in the Samba private directory.
*
* @param name File to find, relative to PRIVATEDIR.
* if name is not relative, then use it as-is
*
* @retval Pointer to a talloc'ed string containing the full path.
**/
char *lpcfg_private_path(TALLOC_CTX* mem_ctx,
struct loadparm_context *lp_ctx,
const char *name)
{
char *fname;
if (name == NULL) {
return NULL;
}
if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
return talloc_strdup(mem_ctx, name);
}
fname = talloc_asprintf(mem_ctx, "%s/%s", lpcfg_private_dir(lp_ctx), name);
return fname;
}
/**
* @brief Returns an absolute path to a NTDB or TDB file in the Samba
* private directory.
*
* @param name File to find, relative to PRIVATEDIR, without .tdb extension.
*
* @retval Pointer to a talloc'ed string containing the full path, for
* use with dbwrap_local_open().
**/
char *lpcfg_private_db_path(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
const char *name)
{
return talloc_asprintf(mem_ctx, "%s/%s.tdb",
lpcfg_private_dir(lp_ctx), name);
}
/**
return a path in the smbd.tmp directory, where all temporary file
for smbd go. If NULL is passed for name then return the directory
path itself
*/
char *smbd_tmp_path(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
const char *name)
{
char *fname, *dname;
bool ok;
dname = lpcfg_private_path(mem_ctx, lp_ctx, "smbd.tmp");
if (dname == NULL) {
return NULL;
}
ok = directory_create_or_exist(dname, 0755);
if (!ok) {
return NULL;
}
if (name == NULL) {
return dname;
}
fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
if (fname == NULL) {
return dname;
}
talloc_free(dname);
return fname;
}
const char *lpcfg_imessaging_path(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx)
{
return smbd_tmp_path(mem_ctx, lp_ctx, "msg");
}
const char *lpcfg_sam_name(struct loadparm_context *lp_ctx)
{
switch (lpcfg_server_role(lp_ctx)) {
case ROLE_DOMAIN_BDC:
case ROLE_DOMAIN_PDC:
case ROLE_ACTIVE_DIRECTORY_DC:
case ROLE_IPA_DC:
return lpcfg_workgroup(lp_ctx);
default:
return lpcfg_netbios_name(lp_ctx);
}
}
const char *lpcfg_sam_dnsname(struct loadparm_context *lp_ctx)
{
switch (lpcfg_server_role(lp_ctx)) {
case ROLE_ACTIVE_DIRECTORY_DC:
case ROLE_IPA_DC:
return lpcfg_dnsdomain(lp_ctx);
default:
return NULL;
}
}
static int
tdb_fetch_lifetime_fn(TDB_DATA key, TDB_DATA data, void *private_data)
{
if (data.dsize < 256) {
long *result = private_data;
char tmp[data.dsize + 1];
memcpy(tmp, data.dptr, data.dsize);
tmp[data.dsize] = '\0';
*result = atol(tmp);
return 0;
}
return -1;
}
static long tdb_fetch_lifetime(struct tdb_context *tdb,
const char *keystr)
{
long result = -1;
int ret;
ret = tdb_parse_record(
tdb,
(TDB_DATA){
.dptr = discard_const_p(uint8_t, keystr),
.dsize = strlen(keystr),
},
tdb_fetch_lifetime_fn,
&result);
if (ret == -1) {
return -1;
}
return result;
}
void lpcfg_default_kdc_policy(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
time_t *svc_tkt_lifetime,
time_t *usr_tkt_lifetime,
time_t *renewal_lifetime)
{
long val;
TDB_CONTEXT *ctx = NULL;
const char *kdc_tdb = NULL;
kdc_tdb = lpcfg_cache_path(mem_ctx, lp_ctx, "gpo.tdb");
if (kdc_tdb)
ctx = tdb_open(kdc_tdb, 0, TDB_DEFAULT, O_RDWR, 0600);
if (!ctx || ( val = tdb_fetch_lifetime(ctx, "kdc:service_ticket_lifetime") ) == -1 )
val = lpcfg_parm_long(lp_ctx, NULL, "kdc", "service ticket lifetime", 10);
*svc_tkt_lifetime = val * 60 * 60;
if (!ctx || ( val = tdb_fetch_lifetime(ctx, "kdc:user_ticket_lifetime") ) == -1 )
val = lpcfg_parm_long(lp_ctx, NULL, "kdc", "user ticket lifetime", 10);
*usr_tkt_lifetime = val * 60 * 60;
if (!ctx || ( val = tdb_fetch_lifetime(ctx, "kdc:renewal_lifetime") ) == -1 )
val = lpcfg_parm_long(lp_ctx, NULL, "kdc", "renewal lifetime", 24 * 7);
*renewal_lifetime = val * 60 * 60;
if (ctx != NULL) {
tdb_close(ctx);
ctx = NULL;
}
}