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samba-mirror/source3/winbindd/winbindd_cache.c
Samuel Cabrero 8d14714cc5 s3: winbind: Remove fstring from wb_acct_info struct 
The group enumeration backend functions try to allocate an array of
wb_acct_info structs with a number of elements equal to the number of
groups. In domains with a large number of groups this allocation may
fail due to the size of the chunk.

Found while trying to enumerate the groups in a domain with more than
700k groups.

Signed-off-by: Samuel Cabrero <scabrero@suse.de>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2018-11-01 01:59:10 +01:00

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/*
Unix SMB/CIFS implementation.
Winbind cache backend functions
Copyright (C) Andrew Tridgell 2001
Copyright (C) Gerald Carter 2003-2007
Copyright (C) Volker Lendecke 2005
Copyright (C) Guenther Deschner 2005
Copyright (C) Michael Adam 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 "system/filesys.h"
#include "winbindd.h"
#include "tdb_validate.h"
#include "../libcli/auth/libcli_auth.h"
#include "../librpc/gen_ndr/ndr_winbind.h"
#include "ads.h"
#include "nss_info.h"
#include "../libcli/security/security.h"
#include "passdb/machine_sid.h"
#include "util_tdb.h"
#include "libsmb/samlogon_cache.h"
#include "lib/namemap_cache.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
#define WINBINDD_CACHE_VER1 1 /* initial db version */
#define WINBINDD_CACHE_VER2 2 /* second version with timeouts for NDR entries */
#define WINBINDD_CACHE_VERSION WINBINDD_CACHE_VER2
#define WINBINDD_CACHE_VERSION_KEYSTR "WINBINDD_CACHE_VERSION"
extern struct winbindd_methods reconnect_methods;
#ifdef HAVE_ADS
extern struct winbindd_methods reconnect_ads_methods;
#endif
extern struct winbindd_methods builtin_passdb_methods;
extern struct winbindd_methods sam_passdb_methods;
static void wcache_flush_cache(void);
/*
* JRA. KEEP THIS LIST UP TO DATE IF YOU ADD CACHE ENTRIES.
* Here are the list of entry types that are *not* stored
* as form struct cache_entry in the cache.
*/
static const char *non_centry_keys[] = {
"SEQNUM/",
"WINBINDD_OFFLINE",
WINBINDD_CACHE_VERSION_KEYSTR,
NULL
};
/************************************************************************
Is this key a non-centry type ?
************************************************************************/
static bool is_non_centry_key(TDB_DATA kbuf)
{
int i;
if (kbuf.dptr == NULL || kbuf.dsize == 0) {
return false;
}
for (i = 0; non_centry_keys[i] != NULL; i++) {
size_t namelen = strlen(non_centry_keys[i]);
if (kbuf.dsize < namelen) {
continue;
}
if (strncmp(non_centry_keys[i], (const char *)kbuf.dptr, namelen) == 0) {
return true;
}
}
return false;
}
/* Global online/offline state - False when online. winbindd starts up online
and sets this to true if the first query fails and there's an entry in
the cache tdb telling us to stay offline. */
static bool global_winbindd_offline_state;
struct winbind_cache {
TDB_CONTEXT *tdb;
};
struct cache_entry {
NTSTATUS status;
uint32_t sequence_number;
uint64_t timeout;
uint8_t *data;
uint32_t len, ofs;
};
void (*smb_panic_fn)(const char *const why) = smb_panic;
static struct winbind_cache *wcache;
static char *wcache_path(void)
{
/*
* Data needs to be kept persistent in state directory for
* running with "winbindd offline logon".
*/
return state_path(talloc_tos(), "winbindd_cache.tdb");
}
static void winbindd_domain_init_backend(struct winbindd_domain *domain)
{
if (domain->backend != NULL) {
return;
}
if (domain->internal) {
domain->backend = &builtin_passdb_methods;
}
if (dom_sid_equal(&domain->sid, &global_sid_Builtin)) {
domain->initialized = true;
}
if (strequal(domain->name, get_global_sam_name()) &&
sid_check_is_our_sam(&domain->sid))
{
domain->backend = &sam_passdb_methods;
}
if (!domain->initialized) {
/* We do not need a connection to an RW DC for cache operation */
init_dc_connection(domain, false);
}
#ifdef HAVE_ADS
if (domain->backend == NULL) {
struct winbindd_domain *our_domain = domain;
/* find our domain first so we can figure out if we
are joined to a kerberized domain */
if (!domain->primary) {
our_domain = find_our_domain();
}
if ((our_domain->active_directory || IS_DC)
&& domain->active_directory
&& !lp_winbind_rpc_only())
{
DBG_INFO("Setting ADS methods for domain %s\n",
domain->name);
domain->backend = &reconnect_ads_methods;
}
}
#endif /* HAVE_ADS */
if (domain->backend == NULL) {
DBG_INFO("Setting MS-RPC methods for domain %s\n", domain->name);
domain->backend = &reconnect_methods;
}
}
/* get the winbind_cache structure */
static struct winbind_cache *get_cache(struct winbindd_domain *domain)
{
struct winbind_cache *ret = wcache;
winbindd_domain_init_backend(domain);
if (ret != NULL) {
return ret;
}
ret = SMB_XMALLOC_P(struct winbind_cache);
ZERO_STRUCTP(ret);
wcache = ret;
wcache_flush_cache();
return ret;
}
/*
free a centry structure
*/
static void centry_free(struct cache_entry *centry)
{
if (!centry)
return;
SAFE_FREE(centry->data);
free(centry);
}
static bool centry_check_bytes(struct cache_entry *centry, size_t nbytes)
{
if (centry->len - centry->ofs < nbytes) {
DEBUG(0,("centry corruption? needed %u bytes, have %d\n",
(unsigned int)nbytes,
centry->len - centry->ofs));
return false;
}
return true;
}
/*
pull a uint64_t from a cache entry
*/
static uint64_t centry_uint64_t(struct cache_entry *centry)
{
uint64_t ret;
if (!centry_check_bytes(centry, 8)) {
smb_panic_fn("centry_uint64_t");
}
ret = BVAL(centry->data, centry->ofs);
centry->ofs += 8;
return ret;
}
/*
pull a uint32_t from a cache entry
*/
static uint32_t centry_uint32(struct cache_entry *centry)
{
uint32_t ret;
if (!centry_check_bytes(centry, 4)) {
smb_panic_fn("centry_uint32");
}
ret = IVAL(centry->data, centry->ofs);
centry->ofs += 4;
return ret;
}
/*
pull a uint16_t from a cache entry
*/
static uint16_t centry_uint16(struct cache_entry *centry)
{
uint16_t ret;
if (!centry_check_bytes(centry, 2)) {
smb_panic_fn("centry_uint16");
}
ret = SVAL(centry->data, centry->ofs);
centry->ofs += 2;
return ret;
}
/*
pull a uint8_t from a cache entry
*/
static uint8_t centry_uint8(struct cache_entry *centry)
{
uint8_t ret;
if (!centry_check_bytes(centry, 1)) {
smb_panic_fn("centry_uint8");
}
ret = CVAL(centry->data, centry->ofs);
centry->ofs += 1;
return ret;
}
/*
pull a NTTIME from a cache entry
*/
static NTTIME centry_nttime(struct cache_entry *centry)
{
NTTIME ret;
if (!centry_check_bytes(centry, 8)) {
smb_panic_fn("centry_nttime");
}
ret = IVAL(centry->data, centry->ofs);
centry->ofs += 4;
ret += (uint64_t)IVAL(centry->data, centry->ofs) << 32;
centry->ofs += 4;
return ret;
}
/*
pull a time_t from a cache entry. time_t stored portably as a 64-bit time.
*/
static time_t centry_time(struct cache_entry *centry)
{
return (time_t)centry_nttime(centry);
}
/* pull a string from a cache entry, using the supplied
talloc context
*/
static char *centry_string(struct cache_entry *centry, TALLOC_CTX *mem_ctx)
{
uint32_t len;
char *ret;
len = centry_uint8(centry);
if (len == 0xFF) {
/* a deliberate NULL string */
return NULL;
}
if (!centry_check_bytes(centry, (size_t)len)) {
smb_panic_fn("centry_string");
}
ret = talloc_array(mem_ctx, char, len+1);
if (!ret) {
smb_panic_fn("centry_string out of memory\n");
}
memcpy(ret,centry->data + centry->ofs, len);
ret[len] = 0;
centry->ofs += len;
return ret;
}
/* pull a hash16 from a cache entry, using the supplied
talloc context
*/
static char *centry_hash16(struct cache_entry *centry, TALLOC_CTX *mem_ctx)
{
uint32_t len;
char *ret;
len = centry_uint8(centry);
if (len != 16) {
DEBUG(0,("centry corruption? hash len (%u) != 16\n",
len ));
return NULL;
}
if (!centry_check_bytes(centry, 16)) {
return NULL;
}
ret = talloc_array(mem_ctx, char, 16);
if (!ret) {
smb_panic_fn("centry_hash out of memory\n");
}
memcpy(ret,centry->data + centry->ofs, 16);
centry->ofs += 16;
return ret;
}
/* pull a sid from a cache entry, using the supplied
talloc context
*/
static bool centry_sid(struct cache_entry *centry, struct dom_sid *sid)
{
char *sid_string;
bool ret;
sid_string = centry_string(centry, talloc_tos());
if (sid_string == NULL) {
return false;
}
ret = string_to_sid(sid, sid_string);
TALLOC_FREE(sid_string);
return ret;
}
/*
pull a NTSTATUS from a cache entry
*/
static NTSTATUS centry_ntstatus(struct cache_entry *centry)
{
NTSTATUS status;
status = NT_STATUS(centry_uint32(centry));
return status;
}
/* the server is considered down if it can't give us a sequence number */
static bool wcache_server_down(struct winbindd_domain *domain)
{
bool ret;
if (!wcache->tdb)
return false;
ret = (domain->sequence_number == DOM_SEQUENCE_NONE);
if (ret)
DEBUG(10,("wcache_server_down: server for Domain %s down\n",
domain->name ));
return ret;
}
struct wcache_seqnum_state {
uint32_t *seqnum;
uint32_t *last_seq_check;
};
static int wcache_seqnum_parser(TDB_DATA key, TDB_DATA data,
void *private_data)
{
struct wcache_seqnum_state *state = private_data;
if (data.dsize != 8) {
DEBUG(10, ("wcache_fetch_seqnum: invalid data size %d\n",
(int)data.dsize));
return -1;
}
*state->seqnum = IVAL(data.dptr, 0);
*state->last_seq_check = IVAL(data.dptr, 4);
return 0;
}
static bool wcache_fetch_seqnum(const char *domain_name, uint32_t *seqnum,
uint32_t *last_seq_check)
{
struct wcache_seqnum_state state = {
.seqnum = seqnum, .last_seq_check = last_seq_check
};
size_t len = strlen(domain_name);
char keystr[len+8];
TDB_DATA key = { .dptr = (uint8_t *)keystr, .dsize = sizeof(keystr) };
int ret;
if (wcache->tdb == NULL) {
DEBUG(10,("wcache_fetch_seqnum: tdb == NULL\n"));
return false;
}
snprintf(keystr, sizeof(keystr), "SEQNUM/%s", domain_name);
ret = tdb_parse_record(wcache->tdb, key, wcache_seqnum_parser,
&state);
return (ret == 0);
}
static NTSTATUS fetch_cache_seqnum( struct winbindd_domain *domain, time_t now )
{
uint32_t last_check, time_diff;
if (!wcache_fetch_seqnum(domain->name, &domain->sequence_number,
&last_check)) {
return NT_STATUS_UNSUCCESSFUL;
}
domain->last_seq_check = last_check;
/* have we expired? */
time_diff = now - domain->last_seq_check;
if ((int)time_diff > lp_winbind_cache_time()) {
DEBUG(10,("fetch_cache_seqnum: timeout [%s][%u @ %u]\n",
domain->name, domain->sequence_number,
(uint32_t)domain->last_seq_check));
return NT_STATUS_UNSUCCESSFUL;
}
DEBUG(10,("fetch_cache_seqnum: success [%s][%u @ %u]\n",
domain->name, domain->sequence_number,
(uint32_t)domain->last_seq_check));
return NT_STATUS_OK;
}
bool wcache_store_seqnum(const char *domain_name, uint32_t seqnum,
time_t last_seq_check)
{
size_t len = strlen(domain_name);
char keystr[len+8];
TDB_DATA key = { .dptr = (uint8_t *)keystr, .dsize = sizeof(keystr) };
uint8_t buf[8];
int ret;
if (wcache->tdb == NULL) {
DEBUG(10, ("wcache_store_seqnum: wcache->tdb == NULL\n"));
return false;
}
snprintf(keystr, sizeof(keystr), "SEQNUM/%s", domain_name);
SIVAL(buf, 0, seqnum);
SIVAL(buf, 4, last_seq_check);
ret = tdb_store(wcache->tdb, key, make_tdb_data(buf, sizeof(buf)),
TDB_REPLACE);
if (ret != 0) {
DEBUG(10, ("tdb_store_bystring failed: %s\n",
tdb_errorstr(wcache->tdb)));
return false;
}
DEBUG(10, ("wcache_store_seqnum: success [%s][%u @ %u]\n",
domain_name, seqnum, (unsigned)last_seq_check));
return true;
}
static bool store_cache_seqnum( struct winbindd_domain *domain )
{
return wcache_store_seqnum(domain->name, domain->sequence_number,
domain->last_seq_check);
}
/*
refresh the domain sequence number on timeout.
*/
static void refresh_sequence_number(struct winbindd_domain *domain)
{
NTSTATUS status;
unsigned time_diff;
time_t t = time(NULL);
unsigned cache_time = lp_winbind_cache_time();
if (is_domain_offline(domain)) {
return;
}
get_cache( domain );
#if 0 /* JERRY -- disable as the default cache time is now 5 minutes */
/* trying to reconnect is expensive, don't do it too often */
if (domain->sequence_number == DOM_SEQUENCE_NONE) {
cache_time *= 8;
}
#endif
time_diff = t - domain->last_seq_check;
/* see if we have to refetch the domain sequence number */
if ((time_diff < cache_time) &&
(domain->sequence_number != DOM_SEQUENCE_NONE) &&
NT_STATUS_IS_OK(domain->last_status)) {
DEBUG(10, ("refresh_sequence_number: %s time ok\n", domain->name));
goto done;
}
/* try to get the sequence number from the tdb cache first */
/* this will update the timestamp as well */
status = fetch_cache_seqnum( domain, t );
if (NT_STATUS_IS_OK(status) &&
(domain->sequence_number != DOM_SEQUENCE_NONE) &&
NT_STATUS_IS_OK(domain->last_status)) {
goto done;
}
/* important! make sure that we know if this is a native
mode domain or not. And that we can contact it. */
if ( winbindd_can_contact_domain( domain ) ) {
status = domain->backend->sequence_number(domain,
&domain->sequence_number);
} else {
/* just use the current time */
status = NT_STATUS_OK;
domain->sequence_number = time(NULL);
}
/* the above call could have set our domain->backend to NULL when
* coming from offline to online mode, make sure to reinitialize the
* backend - Guenther */
get_cache( domain );
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10,("refresh_sequence_number: failed with %s\n", nt_errstr(status)));
domain->sequence_number = DOM_SEQUENCE_NONE;
}
domain->last_status = status;
domain->last_seq_check = time(NULL);
/* save the new sequence number in the cache */
store_cache_seqnum( domain );
done:
DEBUG(10, ("refresh_sequence_number: %s seq number is now %d\n",
domain->name, domain->sequence_number));
return;
}
/*
decide if a cache entry has expired
*/
static bool centry_expired(struct winbindd_domain *domain, const char *keystr, struct cache_entry *centry)
{
/* If we've been told to be offline - stay in that state... */
if (lp_winbind_offline_logon() && global_winbindd_offline_state) {
DEBUG(10,("centry_expired: Key %s for domain %s valid as winbindd is globally offline.\n",
keystr, domain->name ));
return false;
}
/* when the domain is offline return the cached entry.
* This deals with transient offline states... */
if (!domain->online) {
DEBUG(10,("centry_expired: Key %s for domain %s valid as domain is offline.\n",
keystr, domain->name ));
return false;
}
/* if the server is OK and our cache entry came from when it was down then
the entry is invalid */
if ((domain->sequence_number != DOM_SEQUENCE_NONE) &&
(centry->sequence_number == DOM_SEQUENCE_NONE)) {
DEBUG(10,("centry_expired: Key %s for domain %s invalid sequence.\n",
keystr, domain->name ));
return true;
}
/* if the server is down or the cache entry is not older than the
current sequence number or it did not timeout then it is OK */
if (wcache_server_down(domain)
|| ((centry->sequence_number == domain->sequence_number)
&& ((time_t)centry->timeout > time(NULL)))) {
DEBUG(10,("centry_expired: Key %s for domain %s is good.\n",
keystr, domain->name ));
return false;
}
DEBUG(10,("centry_expired: Key %s for domain %s expired\n",
keystr, domain->name ));
/* it's expired */
return true;
}
static struct cache_entry *wcache_fetch_raw(char *kstr)
{
TDB_DATA data;
struct cache_entry *centry;
TDB_DATA key;
key = string_tdb_data(kstr);
data = tdb_fetch(wcache->tdb, key);
if (!data.dptr) {
/* a cache miss */
return NULL;
}
centry = SMB_XMALLOC_P(struct cache_entry);
centry->data = (unsigned char *)data.dptr;
centry->len = data.dsize;
centry->ofs = 0;
if (centry->len < 16) {
/* huh? corrupt cache? */
DEBUG(10,("wcache_fetch_raw: Corrupt cache for key %s "
"(len < 16)?\n", kstr));
centry_free(centry);
return NULL;
}
centry->status = centry_ntstatus(centry);
centry->sequence_number = centry_uint32(centry);
centry->timeout = centry_uint64_t(centry);
return centry;
}
static bool is_my_own_sam_domain(struct winbindd_domain *domain)
{
if (strequal(domain->name, get_global_sam_name()) &&
sid_check_is_our_sam(&domain->sid)) {
return true;
}
return false;
}
static bool is_builtin_domain(struct winbindd_domain *domain)
{
if (strequal(domain->name, "BUILTIN") &&
sid_check_is_builtin(&domain->sid)) {
return true;
}
return false;
}
/*
fetch an entry from the cache, with a varargs key. auto-fetch the sequence
number and return status
*/
static struct cache_entry *wcache_fetch(struct winbind_cache *cache,
struct winbindd_domain *domain,
const char *format, ...) PRINTF_ATTRIBUTE(3,4);
static struct cache_entry *wcache_fetch(struct winbind_cache *cache,
struct winbindd_domain *domain,
const char *format, ...)
{
va_list ap;
char *kstr;
struct cache_entry *centry;
if (!winbindd_use_cache() ||
is_my_own_sam_domain(domain) ||
is_builtin_domain(domain)) {
return NULL;
}
refresh_sequence_number(domain);
va_start(ap, format);
smb_xvasprintf(&kstr, format, ap);
va_end(ap);
centry = wcache_fetch_raw(kstr);
if (centry == NULL) {
free(kstr);
return NULL;
}
if (centry_expired(domain, kstr, centry)) {
DEBUG(10,("wcache_fetch: entry %s expired for domain %s\n",
kstr, domain->name ));
centry_free(centry);
free(kstr);
return NULL;
}
DEBUG(10,("wcache_fetch: returning entry %s for domain %s\n",
kstr, domain->name ));
free(kstr);
return centry;
}
static void wcache_delete(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
static void wcache_delete(const char *format, ...)
{
va_list ap;
char *kstr;
TDB_DATA key;
va_start(ap, format);
smb_xvasprintf(&kstr, format, ap);
va_end(ap);
key = string_tdb_data(kstr);
tdb_delete(wcache->tdb, key);
free(kstr);
}
/*
make sure we have at least len bytes available in a centry
*/
static void centry_expand(struct cache_entry *centry, uint32_t len)
{
if (centry->len - centry->ofs >= len)
return;
centry->len *= 2;
centry->data = SMB_REALLOC_ARRAY(centry->data, unsigned char,
centry->len);
if (!centry->data) {
DEBUG(0,("out of memory: needed %d bytes in centry_expand\n", centry->len));
smb_panic_fn("out of memory in centry_expand");
}
}
/*
push a uint64_t into a centry
*/
static void centry_put_uint64_t(struct cache_entry *centry, uint64_t v)
{
centry_expand(centry, 8);
SBVAL(centry->data, centry->ofs, v);
centry->ofs += 8;
}
/*
push a uint32_t into a centry
*/
static void centry_put_uint32(struct cache_entry *centry, uint32_t v)
{
centry_expand(centry, 4);
SIVAL(centry->data, centry->ofs, v);
centry->ofs += 4;
}
/*
push a uint16_t into a centry
*/
static void centry_put_uint16(struct cache_entry *centry, uint16_t v)
{
centry_expand(centry, 2);
SSVAL(centry->data, centry->ofs, v);
centry->ofs += 2;
}
/*
push a uint8_t into a centry
*/
static void centry_put_uint8(struct cache_entry *centry, uint8_t v)
{
centry_expand(centry, 1);
SCVAL(centry->data, centry->ofs, v);
centry->ofs += 1;
}
/*
push a string into a centry
*/
static void centry_put_string(struct cache_entry *centry, const char *s)
{
int len;
if (!s) {
/* null strings are marked as len 0xFFFF */
centry_put_uint8(centry, 0xFF);
return;
}
len = strlen(s);
/* can't handle more than 254 char strings. Truncating is probably best */
if (len > 254) {
DEBUG(10,("centry_put_string: truncating len (%d) to: 254\n", len));
len = 254;
}
centry_put_uint8(centry, len);
centry_expand(centry, len);
memcpy(centry->data + centry->ofs, s, len);
centry->ofs += len;
}
/*
push a 16 byte hash into a centry - treat as 16 byte string.
*/
static void centry_put_hash16(struct cache_entry *centry, const uint8_t val[16])
{
centry_put_uint8(centry, 16);
centry_expand(centry, 16);
memcpy(centry->data + centry->ofs, val, 16);
centry->ofs += 16;
}
static void centry_put_sid(struct cache_entry *centry, const struct dom_sid *sid)
{
fstring sid_string;
centry_put_string(centry, sid_to_fstring(sid_string, sid));
}
/*
put NTSTATUS into a centry
*/
static void centry_put_ntstatus(struct cache_entry *centry, NTSTATUS status)
{
uint32_t status_value = NT_STATUS_V(status);
centry_put_uint32(centry, status_value);
}
/*
push a NTTIME into a centry
*/
static void centry_put_nttime(struct cache_entry *centry, NTTIME nt)
{
centry_expand(centry, 8);
SIVAL(centry->data, centry->ofs, nt & 0xFFFFFFFF);
centry->ofs += 4;
SIVAL(centry->data, centry->ofs, nt >> 32);
centry->ofs += 4;
}
/*
push a time_t into a centry - use a 64 bit size.
NTTIME here is being used as a convenient 64-bit size.
*/
static void centry_put_time(struct cache_entry *centry, time_t t)
{
NTTIME nt = (NTTIME)t;
centry_put_nttime(centry, nt);
}
/*
start a centry for output. When finished, call centry_end()
*/
static struct cache_entry *centry_start(struct winbindd_domain *domain,
NTSTATUS status)
{
struct cache_entry *centry;
if (!wcache->tdb)
return NULL;
centry = SMB_XMALLOC_P(struct cache_entry);
centry->len = 8192; /* reasonable default */
centry->data = SMB_XMALLOC_ARRAY(uint8_t, centry->len);
centry->ofs = 0;
centry->sequence_number = domain->sequence_number;
centry->timeout = lp_winbind_cache_time() + time(NULL);
centry_put_ntstatus(centry, status);
centry_put_uint32(centry, centry->sequence_number);
centry_put_uint64_t(centry, centry->timeout);
return centry;
}
/*
finish a centry and write it to the tdb
*/
static void centry_end(struct cache_entry *centry, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
static void centry_end(struct cache_entry *centry, const char *format, ...)
{
va_list ap;
char *kstr;
TDB_DATA key, data;
if (!winbindd_use_cache()) {
return;
}
va_start(ap, format);
smb_xvasprintf(&kstr, format, ap);
va_end(ap);
key = string_tdb_data(kstr);
data.dptr = centry->data;
data.dsize = centry->ofs;
tdb_store(wcache->tdb, key, data, TDB_REPLACE);
free(kstr);
}
static void wcache_save_name_to_sid(struct winbindd_domain *domain,
NTSTATUS status, const char *domain_name,
const char *name, const struct dom_sid *sid,
enum lsa_SidType type)
{
bool ok;
ok = namemap_cache_set_name2sid(domain_name, name, sid, type,
time(NULL) + lp_winbind_cache_time());
if (!ok) {
DBG_DEBUG("namemap_cache_set_name2sid failed\n");
}
/*
* Don't store the reverse mapping. The name came from user
* input, and we might not have the correct capitalization,
* which is important for nsswitch.
*/
}
static void wcache_save_sid_to_name(struct winbindd_domain *domain, NTSTATUS status,
const struct dom_sid *sid, const char *domain_name, const char *name, enum lsa_SidType type)
{
bool ok;
ok = namemap_cache_set_sid2name(sid, domain_name, name, type,
time(NULL) + lp_winbind_cache_time());
if (!ok) {
DBG_DEBUG("namemap_cache_set_sid2name failed\n");
}
if (type != SID_NAME_UNKNOWN) {
ok = namemap_cache_set_name2sid(
domain_name, name, sid, type,
time(NULL) + lp_winbind_cache_time());
if (!ok) {
DBG_DEBUG("namemap_cache_set_name2sid failed\n");
}
}
}
static void wcache_save_lockout_policy(struct winbindd_domain *domain,
NTSTATUS status,
struct samr_DomInfo12 *lockout_policy)
{
struct cache_entry *centry;
centry = centry_start(domain, status);
if (!centry)
return;
centry_put_nttime(centry, lockout_policy->lockout_duration);
centry_put_nttime(centry, lockout_policy->lockout_window);
centry_put_uint16(centry, lockout_policy->lockout_threshold);
centry_end(centry, "LOC_POL/%s", domain->name);
DEBUG(10,("wcache_save_lockout_policy: %s\n", domain->name));
centry_free(centry);
}
static void wcache_save_password_policy(struct winbindd_domain *domain,
NTSTATUS status,
struct samr_DomInfo1 *policy)
{
struct cache_entry *centry;
centry = centry_start(domain, status);
if (!centry)
return;
centry_put_uint16(centry, policy->min_password_length);
centry_put_uint16(centry, policy->password_history_length);
centry_put_uint32(centry, policy->password_properties);
centry_put_nttime(centry, policy->max_password_age);
centry_put_nttime(centry, policy->min_password_age);
centry_end(centry, "PWD_POL/%s", domain->name);
DEBUG(10,("wcache_save_password_policy: %s\n", domain->name));
centry_free(centry);
}
/***************************************************************************
***************************************************************************/
static void wcache_save_username_alias(struct winbindd_domain *domain,
NTSTATUS status,
const char *name, const char *alias)
{
struct cache_entry *centry;
fstring uname;
if ( (centry = centry_start(domain, status)) == NULL )
return;
centry_put_string( centry, alias );
fstrcpy(uname, name);
(void)strupper_m(uname);
centry_end(centry, "NSS/NA/%s", uname);
DEBUG(10,("wcache_save_username_alias: %s -> %s\n", name, alias ));
centry_free(centry);
}
static void wcache_save_alias_username(struct winbindd_domain *domain,
NTSTATUS status,
const char *alias, const char *name)
{
struct cache_entry *centry;
fstring uname;
if ( (centry = centry_start(domain, status)) == NULL )
return;
centry_put_string( centry, name );
fstrcpy(uname, alias);
(void)strupper_m(uname);
centry_end(centry, "NSS/AN/%s", uname);
DEBUG(10,("wcache_save_alias_username: %s -> %s\n", alias, name ));
centry_free(centry);
}
/***************************************************************************
***************************************************************************/
NTSTATUS resolve_username_to_alias( TALLOC_CTX *mem_ctx,
struct winbindd_domain *domain,
const char *name, char **alias )
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
char *upper_name;
if ( domain->internal )
return NT_STATUS_NOT_SUPPORTED;
if (!cache->tdb)
goto do_query;
upper_name = talloc_strdup_upper(mem_ctx, name);
if (upper_name == NULL) {
return NT_STATUS_NO_MEMORY;
}
centry = wcache_fetch(cache, domain, "NSS/NA/%s", upper_name);
talloc_free(upper_name);
if (!centry)
goto do_query;
status = centry->status;
if (!NT_STATUS_IS_OK(status)) {
centry_free(centry);
return status;
}
*alias = centry_string( centry, mem_ctx );
centry_free(centry);
DEBUG(10,("resolve_username_to_alias: [Cached] - mapped %s to %s\n",
name, *alias ? *alias : "(none)"));
return (*alias) ? NT_STATUS_OK : NT_STATUS_OBJECT_NAME_NOT_FOUND;
do_query:
/* If its not in cache and we are offline, then fail */
if (is_domain_offline(domain)) {
DEBUG(8,("resolve_username_to_alias: rejecting query "
"in offline mode\n"));
return NT_STATUS_NOT_FOUND;
}
status = nss_map_to_alias( mem_ctx, domain->name, name, alias );
if ( NT_STATUS_IS_OK( status ) ) {
wcache_save_username_alias(domain, status, name, *alias);
}
if ( NT_STATUS_EQUAL( status, NT_STATUS_NONE_MAPPED ) ) {
wcache_save_username_alias(domain, status, name, "(NULL)");
}
DEBUG(5,("resolve_username_to_alias: backend query returned %s\n",
nt_errstr(status)));
if ( NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ) {
set_domain_offline( domain );
}
return status;
}
/***************************************************************************
***************************************************************************/
NTSTATUS resolve_alias_to_username( TALLOC_CTX *mem_ctx,
struct winbindd_domain *domain,
const char *alias, char **name )
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
char *upper_name;
if ( domain->internal )
return NT_STATUS_NOT_SUPPORTED;
if (!cache->tdb)
goto do_query;
upper_name = talloc_strdup(mem_ctx, alias);
if (upper_name == NULL) {
return NT_STATUS_NO_MEMORY;
}
if (!strupper_m(upper_name)) {
talloc_free(upper_name);
return NT_STATUS_INVALID_PARAMETER;
}
centry = wcache_fetch(cache, domain, "NSS/AN/%s", upper_name);
talloc_free(upper_name);
if (!centry)
goto do_query;
status = centry->status;
if (!NT_STATUS_IS_OK(status)) {
centry_free(centry);
return status;
}
*name = centry_string( centry, mem_ctx );
centry_free(centry);
DEBUG(10,("resolve_alias_to_username: [Cached] - mapped %s to %s\n",
alias, *name ? *name : "(none)"));
return (*name) ? NT_STATUS_OK : NT_STATUS_OBJECT_NAME_NOT_FOUND;
do_query:
/* If its not in cache and we are offline, then fail */
if (is_domain_offline(domain)) {
DEBUG(8,("resolve_alias_to_username: rejecting query "
"in offline mode\n"));
return NT_STATUS_NOT_FOUND;
}
/* an alias cannot contain a domain prefix or '@' */
if (strchr(alias, '\\') || strchr(alias, '@')) {
DEBUG(10,("resolve_alias_to_username: skipping fully "
"qualified name %s\n", alias));
return NT_STATUS_OBJECT_NAME_INVALID;
}
status = nss_map_from_alias( mem_ctx, domain->name, alias, name );
if ( NT_STATUS_IS_OK( status ) ) {
wcache_save_alias_username( domain, status, alias, *name );
}
if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
wcache_save_alias_username(domain, status, alias, "(NULL)");
}
DEBUG(5,("resolve_alias_to_username: backend query returned %s\n",
nt_errstr(status)));
if ( NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ) {
set_domain_offline( domain );
}
return status;
}
NTSTATUS wcache_cached_creds_exist(struct winbindd_domain *domain, const struct dom_sid *sid)
{
struct winbind_cache *cache = get_cache(domain);
int ret;
fstring key_str, tmp;
uint32_t rid;
if (!cache->tdb) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
if (is_null_sid(sid)) {
return NT_STATUS_INVALID_SID;
}
if (!(sid_peek_rid(sid, &rid)) || (rid == 0)) {
return NT_STATUS_INVALID_SID;
}
fstr_sprintf(key_str, "CRED/%s", sid_to_fstring(tmp, sid));
ret = tdb_exists(cache->tdb, string_tdb_data(key_str));
if (ret != 1) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
return NT_STATUS_OK;
}
/* Lookup creds for a SID - copes with old (unsalted) creds as well
as new salted ones. */
NTSTATUS wcache_get_creds(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *sid,
const uint8_t **cached_nt_pass,
const uint8_t **cached_salt)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
uint32_t rid;
fstring tmp;
if (!cache->tdb) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
if (is_null_sid(sid)) {
return NT_STATUS_INVALID_SID;
}
if (!(sid_peek_rid(sid, &rid)) || (rid == 0)) {
return NT_STATUS_INVALID_SID;
}
/* Try and get a salted cred first. If we can't
fall back to an unsalted cred. */
centry = wcache_fetch(cache, domain, "CRED/%s",
sid_to_fstring(tmp, sid));
if (!centry) {
DEBUG(10,("wcache_get_creds: entry for [CRED/%s] not found\n",
sid_string_dbg(sid)));
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/*
* We don't use the time element at this moment,
* but we have to consume it, so that we don't
* neet to change the disk format of the cache.
*/
(void)centry_time(centry);
/* In the salted case this isn't actually the nt_hash itself,
but the MD5 of the salt + nt_hash. Let the caller
sort this out. It can tell as we only return the cached_salt
if we are returning a salted cred. */
*cached_nt_pass = (const uint8_t *)centry_hash16(centry, mem_ctx);
if (*cached_nt_pass == NULL) {
fstring sidstr;
sid_to_fstring(sidstr, sid);
/* Bad (old) cred cache. Delete and pretend we
don't have it. */
DEBUG(0,("wcache_get_creds: bad entry for [CRED/%s] - deleting\n",
sidstr));
wcache_delete("CRED/%s", sidstr);
centry_free(centry);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/* We only have 17 bytes more data in the salted cred case. */
if (centry->len - centry->ofs == 17) {
*cached_salt = (const uint8_t *)centry_hash16(centry, mem_ctx);
} else {
*cached_salt = NULL;
}
dump_data_pw("cached_nt_pass", *cached_nt_pass, NT_HASH_LEN);
if (*cached_salt) {
dump_data_pw("cached_salt", *cached_salt, NT_HASH_LEN);
}
status = centry->status;
DEBUG(10,("wcache_get_creds: [Cached] - cached creds for user %s status: %s\n",
sid_string_dbg(sid), nt_errstr(status) ));
centry_free(centry);
return status;
}
/* Store creds for a SID - only writes out new salted ones. */
NTSTATUS wcache_save_creds(struct winbindd_domain *domain,
const struct dom_sid *sid,
const uint8_t nt_pass[NT_HASH_LEN])
{
struct cache_entry *centry;
fstring sid_string;
uint32_t rid;
uint8_t cred_salt[NT_HASH_LEN];
uint8_t salted_hash[NT_HASH_LEN];
if (is_null_sid(sid)) {
return NT_STATUS_INVALID_SID;
}
if (!(sid_peek_rid(sid, &rid)) || (rid == 0)) {
return NT_STATUS_INVALID_SID;
}
centry = centry_start(domain, NT_STATUS_OK);
if (!centry) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
centry_put_time(centry, time(NULL));
/* Create a salt and then salt the hash. */
generate_random_buffer(cred_salt, NT_HASH_LEN);
E_md5hash(cred_salt, nt_pass, salted_hash);
centry_put_hash16(centry, salted_hash);
centry_put_hash16(centry, cred_salt);
centry_end(centry, "CRED/%s", sid_to_fstring(sid_string, sid));
DEBUG(10,("wcache_save_creds: %s\n", sid_string));
centry_free(centry);
return NT_STATUS_OK;
}
/* Query display info. This is the basic user list fn */
NTSTATUS wb_cache_query_user_list(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32_t **prids)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
uint32_t num_rids = 0;
uint32_t *rids = NULL;
NTSTATUS status;
unsigned int i, retry;
bool old_status = domain->online;
*prids = NULL;
if (!cache->tdb)
goto do_query;
centry = wcache_fetch(cache, domain, "UL/%s", domain->name);
if (!centry)
goto do_query;
do_fetch_cache:
num_rids = centry_uint32(centry);
if (num_rids == 0) {
goto do_cached;
}
rids = talloc_array(mem_ctx, uint32_t, num_rids);
if (rids == NULL) {
centry_free(centry);
return NT_STATUS_NO_MEMORY;
}
for (i=0; i<num_rids; i++) {
rids[i] = centry_uint32(centry);
}
do_cached:
status = centry->status;
DEBUG(10,("query_user_list: [Cached] - cached list for domain %s status: %s\n",
domain->name, nt_errstr(status) ));
centry_free(centry);
return status;
do_query:
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
/* Put the query_user_list() in a retry loop. There appears to be
* some bug either with Windows 2000 or Samba's handling of large
* rpc replies. This manifests itself as sudden disconnection
* at a random point in the enumeration of a large (60k) user list.
* The retry loop simply tries the operation again. )-: It's not
* pretty but an acceptable workaround until we work out what the
* real problem is. */
retry = 0;
do {
DEBUG(10,("query_user_list: [Cached] - doing backend query for list for domain %s\n",
domain->name ));
rids = NULL;
status = domain->backend->query_user_list(domain, mem_ctx,
&rids);
num_rids = talloc_array_length(rids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("query_user_list: returned 0x%08x, "
"retrying\n", NT_STATUS_V(status)));
}
if (NT_STATUS_EQUAL(status, NT_STATUS_UNSUCCESSFUL)) {
DEBUG(3, ("query_user_list: flushing "
"connection cache\n"));
invalidate_cm_connection(domain);
}
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
/* store partial response. */
if (num_rids > 0) {
/*
* humm, what about the status used for cache?
* Should it be NT_STATUS_OK?
*/
break;
}
/*
* domain is offline now, and there is no user entries,
* try to fetch from cache again.
*/
if (cache->tdb && !domain->online && !domain->internal && old_status) {
centry = wcache_fetch(cache, domain, "UL/%s", domain->name);
/* partial response... */
if (!centry) {
goto skip_save;
} else {
goto do_fetch_cache;
}
} else {
goto skip_save;
}
}
} while (NT_STATUS_V(status) == NT_STATUS_V(NT_STATUS_UNSUCCESSFUL) &&
(retry++ < 5));
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
centry = centry_start(domain, status);
if (!centry)
goto skip_save;
centry_put_uint32(centry, num_rids);
for (i=0; i<num_rids; i++) {
centry_put_uint32(centry, rids[i]);
}
centry_end(centry, "UL/%s", domain->name);
centry_free(centry);
*prids = rids;
skip_save:
return status;
}
/* list all domain groups */
NTSTATUS wb_cache_enum_dom_groups(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32_t *num_entries,
struct wb_acct_info **info)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
unsigned int i;
bool old_status;
old_status = domain->online;
if (!cache->tdb)
goto do_query;
centry = wcache_fetch(cache, domain, "GL/%s/domain", domain->name);
if (!centry)
goto do_query;
do_fetch_cache:
*num_entries = centry_uint32(centry);
if (*num_entries == 0)
goto do_cached;
(*info) = talloc_array(mem_ctx, struct wb_acct_info, *num_entries);
if (! (*info)) {
smb_panic_fn("enum_dom_groups out of memory");
}
for (i=0; i<(*num_entries); i++) {
(*info)[i].acct_name = centry_string(centry, (*info));
(*info)[i].acct_desc = centry_string(centry, (*info));
(*info)[i].rid = centry_uint32(centry);
}
do_cached:
status = centry->status;
DEBUG(10,("enum_dom_groups: [Cached] - cached list for domain %s status: %s\n",
domain->name, nt_errstr(status) ));
centry_free(centry);
return status;
do_query:
*num_entries = 0;
*info = NULL;
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("enum_dom_groups: [Cached] - doing backend query for list for domain %s\n",
domain->name ));
status = domain->backend->enum_dom_groups(domain, mem_ctx, num_entries, info);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (cache->tdb &&
!domain->online &&
!domain->internal &&
old_status) {
centry = wcache_fetch(cache, domain, "GL/%s/domain", domain->name);
if (centry) {
goto do_fetch_cache;
}
}
}
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
centry = centry_start(domain, status);
if (!centry)
goto skip_save;
centry_put_uint32(centry, *num_entries);
for (i=0; i<(*num_entries); i++) {
centry_put_string(centry, (*info)[i].acct_name);
centry_put_string(centry, (*info)[i].acct_desc);
centry_put_uint32(centry, (*info)[i].rid);
}
centry_end(centry, "GL/%s/domain", domain->name);
centry_free(centry);
skip_save:
return status;
}
/* list all domain groups */
NTSTATUS wb_cache_enum_local_groups(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32_t *num_entries,
struct wb_acct_info **info)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
unsigned int i;
bool old_status;
old_status = domain->online;
if (!cache->tdb)
goto do_query;
centry = wcache_fetch(cache, domain, "GL/%s/local", domain->name);
if (!centry)
goto do_query;
do_fetch_cache:
*num_entries = centry_uint32(centry);
if (*num_entries == 0)
goto do_cached;
(*info) = talloc_array(mem_ctx, struct wb_acct_info, *num_entries);
if (! (*info)) {
smb_panic_fn("enum_dom_groups out of memory");
}
for (i=0; i<(*num_entries); i++) {
(*info)[i].acct_name = centry_string(centry, (*info));
(*info)[i].acct_desc = centry_string(centry, (*info));
(*info)[i].rid = centry_uint32(centry);
}
do_cached:
/* If we are returning cached data and the domain controller
is down then we don't know whether the data is up to date
or not. Return NT_STATUS_MORE_PROCESSING_REQUIRED to
indicate this. */
if (wcache_server_down(domain)) {
DEBUG(10, ("enum_local_groups: returning cached user list and server was down\n"));
status = NT_STATUS_MORE_PROCESSING_REQUIRED;
} else
status = centry->status;
DEBUG(10,("enum_local_groups: [Cached] - cached list for domain %s status: %s\n",
domain->name, nt_errstr(status) ));
centry_free(centry);
return status;
do_query:
*num_entries = 0;
*info = NULL;
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("enum_local_groups: [Cached] - doing backend query for list for domain %s\n",
domain->name ));
status = domain->backend->enum_local_groups(domain, mem_ctx, num_entries, info);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (cache->tdb &&
!domain->internal &&
!domain->online &&
old_status) {
centry = wcache_fetch(cache, domain, "GL/%s/local", domain->name);
if (centry) {
goto do_fetch_cache;
}
}
}
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
centry = centry_start(domain, status);
if (!centry)
goto skip_save;
centry_put_uint32(centry, *num_entries);
for (i=0; i<(*num_entries); i++) {
centry_put_string(centry, (*info)[i].acct_name);
centry_put_string(centry, (*info)[i].acct_desc);
centry_put_uint32(centry, (*info)[i].rid);
}
centry_end(centry, "GL/%s/local", domain->name);
centry_free(centry);
skip_save:
return status;
}
struct wcache_name_to_sid_state {
struct dom_sid *sid;
enum lsa_SidType *type;
bool offline;
bool found;
};
static void wcache_name_to_sid_fn(const struct dom_sid *sid,
enum lsa_SidType type,
bool expired,
void *private_data)
{
struct wcache_name_to_sid_state *state = private_data;
*state->sid = *sid;
*state->type = type;
state->found = (!expired || state->offline);
}
static NTSTATUS wcache_name_to_sid(struct winbindd_domain *domain,
const char *domain_name,
const char *name,
struct dom_sid *sid,
enum lsa_SidType *type)
{
struct wcache_name_to_sid_state state = {
.sid = sid, .type = type, .found = false,
.offline = is_domain_offline(domain),
};
bool ok;
ok = namemap_cache_find_name(domain_name, name, wcache_name_to_sid_fn,
&state);
if (!ok) {
DBG_DEBUG("namemap_cache_find_name failed\n");
return NT_STATUS_NOT_FOUND;
}
if (!state.found) {
DBG_DEBUG("cache entry not found\n");
return NT_STATUS_NOT_FOUND;
}
if (*type == SID_NAME_UNKNOWN) {
return NT_STATUS_NONE_MAPPED;
}
return NT_STATUS_OK;
}
/* convert a single name to a sid in a domain */
NTSTATUS wb_cache_name_to_sid(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const char *domain_name,
const char *name,
uint32_t flags,
struct dom_sid *sid,
enum lsa_SidType *type)
{
NTSTATUS status;
bool old_status;
old_status = domain->online;
status = wcache_name_to_sid(domain, domain_name, name, sid, type);
if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
return status;
}
ZERO_STRUCTP(sid);
/* If the seq number check indicated that there is a problem
* with this DC, then return that status... except for
* access_denied. This is special because the dc may be in
* "restrict anonymous = 1" mode, in which case it will deny
* most unauthenticated operations, but *will* allow the LSA
* name-to-sid that we try as a fallback. */
if (!(NT_STATUS_IS_OK(domain->last_status)
|| NT_STATUS_EQUAL(domain->last_status, NT_STATUS_ACCESS_DENIED)))
return domain->last_status;
DEBUG(10,("name_to_sid: [Cached] - doing backend query for name for domain %s\n",
domain->name ));
winbindd_domain_init_backend(domain);
status = domain->backend->name_to_sid(domain, mem_ctx, domain_name,
name, flags, sid, type);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (!domain->internal &&
!domain->online &&
old_status) {
NTSTATUS cache_status;
cache_status = wcache_name_to_sid(domain, domain_name, name, sid, type);
return cache_status;
}
}
/* and save it */
if (domain->online &&
(NT_STATUS_IS_OK(status) || NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED))) {
enum lsa_SidType save_type = *type;
if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
save_type = SID_NAME_UNKNOWN;
}
wcache_save_name_to_sid(domain, status, domain_name, name, sid,
save_type);
/* Only save the reverse mapping if this was not a UPN */
if (!strchr(name, '@')) {
if (!strupper_m(discard_const_p(char, domain_name))) {
return NT_STATUS_INVALID_PARAMETER;
}
(void)strlower_m(discard_const_p(char, name));
wcache_save_sid_to_name(domain, status, sid,
domain_name, name, save_type);
}
}
return status;
}
struct wcache_sid_to_name_state {
TALLOC_CTX *mem_ctx;
char **domain_name;
char **name;
enum lsa_SidType *type;
bool offline;
bool found;
};
static void wcache_sid_to_name_fn(const char *domain,
const char *name,
enum lsa_SidType type,
bool expired,
void *private_data)
{
struct wcache_sid_to_name_state *state = private_data;
*state->domain_name = talloc_strdup(state->mem_ctx, domain);
if (*state->domain_name == NULL) {
return;
}
*state->name = talloc_strdup(state->mem_ctx, name);
if (*state->name == NULL) {
return;
}
*state->type = type;
state->found = (!expired || state->offline);
}
static NTSTATUS wcache_sid_to_name(struct winbindd_domain *domain,
const struct dom_sid *sid,
TALLOC_CTX *mem_ctx,
char **domain_name,
char **name,
enum lsa_SidType *type)
{
struct wcache_sid_to_name_state state = {
.mem_ctx = mem_ctx, .found = false,
.domain_name = domain_name, .name = name, .type = type,
.offline = is_domain_offline(domain)
};
bool ok;
ok = namemap_cache_find_sid(sid, wcache_sid_to_name_fn, &state);
if (!ok) {
DBG_DEBUG("namemap_cache_find_name failed\n");
return NT_STATUS_NOT_FOUND;
}
if (!state.found) {
DBG_DEBUG("cache entry not found\n");
return NT_STATUS_NOT_FOUND;
}
if (*type == SID_NAME_UNKNOWN) {
return NT_STATUS_NONE_MAPPED;
}
return NT_STATUS_OK;
}
/* convert a sid to a user or group name. The sid is guaranteed to be in the domain
given */
NTSTATUS wb_cache_sid_to_name(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *sid,
char **domain_name,
char **name,
enum lsa_SidType *type)
{
NTSTATUS status;
bool old_status;
old_status = domain->online;
status = wcache_sid_to_name(domain, sid, mem_ctx, domain_name, name,
type);
if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
return status;
}
*name = NULL;
*domain_name = NULL;
/* If the seq number check indicated that there is a problem
* with this DC, then return that status... except for
* access_denied. This is special because the dc may be in
* "restrict anonymous = 1" mode, in which case it will deny
* most unauthenticated operations, but *will* allow the LSA
* sid-to-name that we try as a fallback. */
if (!(NT_STATUS_IS_OK(domain->last_status)
|| NT_STATUS_EQUAL(domain->last_status, NT_STATUS_ACCESS_DENIED)))
return domain->last_status;
DEBUG(10,("sid_to_name: [Cached] - doing backend query for name for domain %s\n",
domain->name ));
winbindd_domain_init_backend(domain);
status = domain->backend->sid_to_name(domain, mem_ctx, sid, domain_name, name, type);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (!domain->internal &&
!domain->online &&
old_status) {
NTSTATUS cache_status;
cache_status = wcache_sid_to_name(domain, sid, mem_ctx,
domain_name, name, type);
return cache_status;
}
}
/* and save it */
if (!NT_STATUS_IS_OK(status)) {
return status;
}
wcache_save_sid_to_name(domain, status, sid, *domain_name, *name, *type);
/* We can't save the name to sid mapping here, as with sid history a
* later name2sid would give the wrong sid. */
return status;
}
NTSTATUS wb_cache_rids_to_names(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *domain_sid,
uint32_t *rids,
size_t num_rids,
char **domain_name,
char ***names,
enum lsa_SidType **types)
{
struct winbind_cache *cache = get_cache(domain);
size_t i;
NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
bool have_mapped;
bool have_unmapped;
bool old_status;
old_status = domain->online;
*domain_name = NULL;
*names = NULL;
*types = NULL;
if (!cache->tdb) {
goto do_query;
}
if (num_rids == 0) {
return NT_STATUS_OK;
}
*names = talloc_array(mem_ctx, char *, num_rids);
*types = talloc_array(mem_ctx, enum lsa_SidType, num_rids);
if ((*names == NULL) || (*types == NULL)) {
result = NT_STATUS_NO_MEMORY;
goto error;
}
have_mapped = have_unmapped = false;
for (i=0; i<num_rids; i++) {
struct dom_sid sid;
NTSTATUS status;
enum lsa_SidType type;
char *dom, *name;
if (!sid_compose(&sid, domain_sid, rids[i])) {
result = NT_STATUS_INTERNAL_ERROR;
goto error;
}
status = wcache_sid_to_name(domain, &sid, *names, &dom,
&name, &type);
(*types)[i] = SID_NAME_UNKNOWN;
(*names)[i] = talloc_strdup(*names, "");
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
/* not cached */
goto do_query;
}
if (NT_STATUS_IS_OK(status)) {
have_mapped = true;
(*types)[i] = type;
if (*domain_name == NULL) {
*domain_name = dom;
} else {
TALLOC_FREE(dom);
}
(*names)[i] = name;
} else if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
have_unmapped = true;
} else {
/* something's definitely wrong */
result = status;
goto error;
}
}
if (!have_mapped) {
return NT_STATUS_NONE_MAPPED;
}
if (!have_unmapped) {
return NT_STATUS_OK;
}
return STATUS_SOME_UNMAPPED;
do_query:
TALLOC_FREE(*names);
TALLOC_FREE(*types);
result = domain->backend->rids_to_names(domain, mem_ctx, domain_sid,
rids, num_rids, domain_name,
names, types);
if (NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (cache->tdb &&
!domain->internal &&
!domain->online &&
old_status) {
have_mapped = have_unmapped = false;
*names = talloc_array(mem_ctx, char *, num_rids);
if (*names == NULL) {
result = NT_STATUS_NO_MEMORY;
goto error;
}
*types = talloc_array(mem_ctx, enum lsa_SidType,
num_rids);
if (*types == NULL) {
result = NT_STATUS_NO_MEMORY;
goto error;
}
for (i=0; i<num_rids; i++) {
struct dom_sid sid;
NTSTATUS status;
enum lsa_SidType type;
char *dom, *name;
if (!sid_compose(&sid, domain_sid, rids[i])) {
result = NT_STATUS_INTERNAL_ERROR;
goto error;
}
status = wcache_sid_to_name(domain, &sid,
*names, &dom,
&name, &type);
(*types)[i] = SID_NAME_UNKNOWN;
(*names)[i] = talloc_strdup(*names, "");
if (NT_STATUS_IS_OK(status)) {
have_mapped = true;
(*types)[i] = type;
if (*domain_name == NULL) {
*domain_name = dom;
} else {
TALLOC_FREE(dom);
}
(*names)[i] = name;
} else if (NT_STATUS_EQUAL(
status,
NT_STATUS_NONE_MAPPED)) {
have_unmapped = true;
} else {
/* something's definitely wrong */
result = status;
goto error;
}
}
if (!have_mapped) {
return NT_STATUS_NONE_MAPPED;
}
if (!have_unmapped) {
return NT_STATUS_OK;
}
return STATUS_SOME_UNMAPPED;
}
}
/*
None of the queried rids has been found so save all negative entries
*/
if (NT_STATUS_EQUAL(result, NT_STATUS_NONE_MAPPED)) {
for (i = 0; i < num_rids; i++) {
struct dom_sid sid;
const char *name = "";
const enum lsa_SidType type = SID_NAME_UNKNOWN;
NTSTATUS status = NT_STATUS_NONE_MAPPED;
if (!sid_compose(&sid, domain_sid, rids[i])) {
return NT_STATUS_INTERNAL_ERROR;
}
wcache_save_sid_to_name(domain, status, &sid, *domain_name,
name, type);
}
return result;
}
/*
Some or all of the queried rids have been found.
*/
if (!NT_STATUS_IS_OK(result) &&
!NT_STATUS_EQUAL(result, STATUS_SOME_UNMAPPED)) {
return result;
}
refresh_sequence_number(domain);
for (i=0; i<num_rids; i++) {
struct dom_sid sid;
NTSTATUS status;
if (!sid_compose(&sid, domain_sid, rids[i])) {
result = NT_STATUS_INTERNAL_ERROR;
goto error;
}
status = (*types)[i] == SID_NAME_UNKNOWN ?
NT_STATUS_NONE_MAPPED : NT_STATUS_OK;
wcache_save_sid_to_name(domain, status, &sid, *domain_name,
(*names)[i], (*types)[i]);
}
return result;
error:
TALLOC_FREE(*names);
TALLOC_FREE(*types);
return result;
}
static NTSTATUS wcache_query_user(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *user_sid,
struct wbint_userinfo *info)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
char *sid_string;
if (cache->tdb == NULL) {
return NT_STATUS_NOT_FOUND;
}
sid_string = sid_string_tos(user_sid);
if (sid_string == NULL) {
return NT_STATUS_NO_MEMORY;
}
centry = wcache_fetch(cache, domain, "U/%s", sid_string);
TALLOC_FREE(sid_string);
if (centry == NULL) {
return NT_STATUS_NOT_FOUND;
}
/*
* If we have an access denied cache entry and a cached info3
* in the samlogon cache then do a query. This will force the
* rpc back end to return the info3 data.
*/
if (NT_STATUS_EQUAL(domain->last_status, NT_STATUS_ACCESS_DENIED) &&
netsamlogon_cache_have(user_sid)) {
DEBUG(10, ("query_user: cached access denied and have cached "
"info3\n"));
domain->last_status = NT_STATUS_OK;
centry_free(centry);
return NT_STATUS_NOT_FOUND;
}
/* if status is not ok then this is a negative hit
and the rest of the data doesn't matter */
status = centry->status;
if (NT_STATUS_IS_OK(status)) {
info->domain_name = centry_string(centry, mem_ctx);
info->acct_name = centry_string(centry, mem_ctx);
info->full_name = centry_string(centry, mem_ctx);
info->homedir = centry_string(centry, mem_ctx);
info->shell = centry_string(centry, mem_ctx);
info->uid = centry_uint32(centry);
info->primary_gid = centry_uint32(centry);
info->primary_group_name = centry_string(centry, mem_ctx);
centry_sid(centry, &info->user_sid);
centry_sid(centry, &info->group_sid);
}
DEBUG(10,("query_user: [Cached] - cached info for domain %s status: "
"%s\n", domain->name, nt_errstr(status) ));
centry_free(centry);
return status;
}
/**
* @brief Query a fullname from the username cache (for further gecos processing)
*
* @param domain A pointer to the winbindd_domain struct.
* @param mem_ctx The talloc context.
* @param user_sid The user sid.
* @param full_name A pointer to the full_name string.
*
* @return NTSTATUS code
*/
NTSTATUS wcache_query_user_fullname(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *user_sid,
const char **full_name)
{
NTSTATUS status;
struct wbint_userinfo info;
status = wcache_query_user(domain, mem_ctx, user_sid, &info);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
if (info.full_name != NULL) {
*full_name = talloc_strdup(mem_ctx, info.full_name);
if (*full_name == NULL) {
return NT_STATUS_NO_MEMORY;
}
}
return NT_STATUS_OK;
}
static NTSTATUS wcache_lookup_usergroups(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *user_sid,
uint32_t *pnum_sids,
struct dom_sid **psids)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
uint32_t i, num_sids;
struct dom_sid *sids;
fstring sid_string;
if (cache->tdb == NULL) {
return NT_STATUS_NOT_FOUND;
}
centry = wcache_fetch(cache, domain, "UG/%s",
sid_to_fstring(sid_string, user_sid));
if (centry == NULL) {
return NT_STATUS_NOT_FOUND;
}
/* If we have an access denied cache entry and a cached info3 in the
samlogon cache then do a query. This will force the rpc back end
to return the info3 data. */
if (NT_STATUS_EQUAL(domain->last_status, NT_STATUS_ACCESS_DENIED)
&& netsamlogon_cache_have(user_sid)) {
DEBUG(10, ("lookup_usergroups: cached access denied and have "
"cached info3\n"));
domain->last_status = NT_STATUS_OK;
centry_free(centry);
return NT_STATUS_NOT_FOUND;
}
num_sids = centry_uint32(centry);
sids = talloc_array(mem_ctx, struct dom_sid, num_sids);
if (sids == NULL) {
centry_free(centry);
return NT_STATUS_NO_MEMORY;
}
for (i=0; i<num_sids; i++) {
centry_sid(centry, &sids[i]);
}
status = centry->status;
DEBUG(10,("lookup_usergroups: [Cached] - cached info for domain %s "
"status: %s\n", domain->name, nt_errstr(status)));
centry_free(centry);
*pnum_sids = num_sids;
*psids = sids;
return status;
}
/* Lookup groups a user is a member of. */
NTSTATUS wb_cache_lookup_usergroups(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *user_sid,
uint32_t *num_groups,
struct dom_sid **user_gids)
{
struct cache_entry *centry = NULL;
NTSTATUS status;
unsigned int i;
fstring sid_string;
bool old_status;
old_status = domain->online;
status = wcache_lookup_usergroups(domain, mem_ctx, user_sid,
num_groups, user_gids);
if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
return status;
}
(*num_groups) = 0;
(*user_gids) = NULL;
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("lookup_usergroups: [Cached] - doing backend query for info for domain %s\n",
domain->name ));
status = domain->backend->lookup_usergroups(domain, mem_ctx, user_sid, num_groups, user_gids);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (!domain->internal &&
!domain->online &&
old_status) {
NTSTATUS cache_status;
cache_status = wcache_lookup_usergroups(domain, mem_ctx, user_sid,
num_groups, user_gids);
return cache_status;
}
}
if ( NT_STATUS_EQUAL(status, NT_STATUS_SYNCHRONIZATION_REQUIRED) )
goto skip_save;
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
centry = centry_start(domain, status);
if (!centry)
goto skip_save;
centry_put_uint32(centry, *num_groups);
for (i=0; i<(*num_groups); i++) {
centry_put_sid(centry, &(*user_gids)[i]);
}
centry_end(centry, "UG/%s", sid_to_fstring(sid_string, user_sid));
centry_free(centry);
skip_save:
return status;
}
static char *wcache_make_sidlist(TALLOC_CTX *mem_ctx, uint32_t num_sids,
const struct dom_sid *sids)
{
uint32_t i;
char *sidlist;
sidlist = talloc_strdup(mem_ctx, "");
if (sidlist == NULL) {
return NULL;
}
for (i=0; i<num_sids; i++) {
fstring tmp;
sidlist = talloc_asprintf_append_buffer(
sidlist, "/%s", sid_to_fstring(tmp, &sids[i]));
if (sidlist == NULL) {
return NULL;
}
}
return sidlist;
}
static NTSTATUS wcache_lookup_useraliases(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32_t num_sids,
const struct dom_sid *sids,
uint32_t *pnum_aliases,
uint32_t **paliases)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
uint32_t i, num_aliases;
uint32_t *aliases;
NTSTATUS status;
char *sidlist;
if (cache->tdb == NULL) {
return NT_STATUS_NOT_FOUND;
}
if (num_sids == 0) {
*pnum_aliases = 0;
*paliases = NULL;
return NT_STATUS_OK;
}
/* We need to cache indexed by the whole list of SIDs, the aliases
* resulting might come from any of the SIDs. */
sidlist = wcache_make_sidlist(talloc_tos(), num_sids, sids);
if (sidlist == NULL) {
return NT_STATUS_NO_MEMORY;
}
centry = wcache_fetch(cache, domain, "UA%s", sidlist);
TALLOC_FREE(sidlist);
if (centry == NULL) {
return NT_STATUS_NOT_FOUND;
}
num_aliases = centry_uint32(centry);
aliases = talloc_array(mem_ctx, uint32_t, num_aliases);
if (aliases == NULL) {
centry_free(centry);
return NT_STATUS_NO_MEMORY;
}
for (i=0; i<num_aliases; i++) {
aliases[i] = centry_uint32(centry);
}
status = centry->status;
DEBUG(10,("lookup_useraliases: [Cached] - cached info for domain: %s "
"status %s\n", domain->name, nt_errstr(status)));
centry_free(centry);
*pnum_aliases = num_aliases;
*paliases = aliases;
return status;
}
NTSTATUS wb_cache_lookup_useraliases(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32_t num_sids,
const struct dom_sid *sids,
uint32_t *num_aliases,
uint32_t **alias_rids)
{
struct cache_entry *centry = NULL;
NTSTATUS status;
char *sidlist;
uint32_t i;
bool old_status;
old_status = domain->online;
status = wcache_lookup_useraliases(domain, mem_ctx, num_sids, sids,
num_aliases, alias_rids);
if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
return status;
}
(*num_aliases) = 0;
(*alias_rids) = NULL;
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("lookup_usergroups: [Cached] - doing backend query for info "
"for domain %s\n", domain->name ));
sidlist = wcache_make_sidlist(talloc_tos(), num_sids, sids);
if (sidlist == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = domain->backend->lookup_useraliases(domain, mem_ctx,
num_sids, sids,
num_aliases, alias_rids);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (!domain->internal &&
!domain->online &&
old_status) {
NTSTATUS cache_status;
cache_status = wcache_lookup_useraliases(domain, mem_ctx, num_sids,
sids, num_aliases, alias_rids);
return cache_status;
}
}
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
centry = centry_start(domain, status);
if (!centry)
goto skip_save;
centry_put_uint32(centry, *num_aliases);
for (i=0; i<(*num_aliases); i++)
centry_put_uint32(centry, (*alias_rids)[i]);
centry_end(centry, "UA%s", sidlist);
centry_free(centry);
skip_save:
return status;
}
static NTSTATUS wcache_lookup_groupmem(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *group_sid,
uint32_t *num_names,
struct dom_sid **sid_mem, char ***names,
uint32_t **name_types)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
unsigned int i;
char *sid_string;
if (cache->tdb == NULL) {
return NT_STATUS_NOT_FOUND;
}
sid_string = sid_string_tos(group_sid);
if (sid_string == NULL) {
return NT_STATUS_NO_MEMORY;
}
centry = wcache_fetch(cache, domain, "GM/%s", sid_string);
TALLOC_FREE(sid_string);
if (centry == NULL) {
return NT_STATUS_NOT_FOUND;
}
*sid_mem = NULL;
*names = NULL;
*name_types = NULL;
*num_names = centry_uint32(centry);
if (*num_names == 0) {
centry_free(centry);
return NT_STATUS_OK;
}
*sid_mem = talloc_array(mem_ctx, struct dom_sid, *num_names);
*names = talloc_array(mem_ctx, char *, *num_names);
*name_types = talloc_array(mem_ctx, uint32_t, *num_names);
if ((*sid_mem == NULL) || (*names == NULL) || (*name_types == NULL)) {
TALLOC_FREE(*sid_mem);
TALLOC_FREE(*names);
TALLOC_FREE(*name_types);
centry_free(centry);
return NT_STATUS_NO_MEMORY;
}
for (i=0; i<(*num_names); i++) {
centry_sid(centry, &(*sid_mem)[i]);
(*names)[i] = centry_string(centry, mem_ctx);
(*name_types)[i] = centry_uint32(centry);
}
status = centry->status;
DEBUG(10,("lookup_groupmem: [Cached] - cached info for domain %s "
"status: %s\n", domain->name, nt_errstr(status)));
centry_free(centry);
return status;
}
NTSTATUS wb_cache_lookup_groupmem(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
const struct dom_sid *group_sid,
enum lsa_SidType type,
uint32_t *num_names,
struct dom_sid **sid_mem,
char ***names,
uint32_t **name_types)
{
struct cache_entry *centry = NULL;
NTSTATUS status;
unsigned int i;
fstring sid_string;
bool old_status;
old_status = domain->online;
status = wcache_lookup_groupmem(domain, mem_ctx, group_sid, num_names,
sid_mem, names, name_types);
if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
return status;
}
(*num_names) = 0;
(*sid_mem) = NULL;
(*names) = NULL;
(*name_types) = NULL;
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("lookup_groupmem: [Cached] - doing backend query for info for domain %s\n",
domain->name ));
status = domain->backend->lookup_groupmem(domain, mem_ctx, group_sid,
type, num_names,
sid_mem, names, name_types);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (!domain->internal &&
!domain->online &&
old_status) {
NTSTATUS cache_status;
cache_status = wcache_lookup_groupmem(domain, mem_ctx, group_sid,
num_names, sid_mem, names,
name_types);
return cache_status;
}
}
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
centry = centry_start(domain, status);
if (!centry)
goto skip_save;
centry_put_uint32(centry, *num_names);
for (i=0; i<(*num_names); i++) {
centry_put_sid(centry, &(*sid_mem)[i]);
centry_put_string(centry, (*names)[i]);
centry_put_uint32(centry, (*name_types)[i]);
}
centry_end(centry, "GM/%s", sid_to_fstring(sid_string, group_sid));
centry_free(centry);
skip_save:
return status;
}
/* find the sequence number for a domain */
NTSTATUS wb_cache_sequence_number(struct winbindd_domain *domain,
uint32_t *seq)
{
refresh_sequence_number(domain);
*seq = domain->sequence_number;
return NT_STATUS_OK;
}
/* enumerate trusted domains
* (we need to have the list of trustdoms in the cache when we go offline) -
* Guenther */
NTSTATUS wb_cache_trusted_domains(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
struct netr_DomainTrustList *trusts)
{
NTSTATUS status;
struct winbind_cache *cache;
struct winbindd_tdc_domain *dom_list = NULL;
size_t num_domains = 0;
bool retval = false;
size_t i;
bool old_status;
old_status = domain->online;
trusts->count = 0;
trusts->array = NULL;
cache = get_cache(domain);
if (!cache || !cache->tdb) {
goto do_query;
}
if (domain->online) {
goto do_query;
}
retval = wcache_tdc_fetch_list(&dom_list, &num_domains);
if (!retval || !num_domains || !dom_list) {
TALLOC_FREE(dom_list);
goto do_query;
}
do_fetch_cache:
trusts->array = talloc_zero_array(mem_ctx, struct netr_DomainTrust, num_domains);
if (!trusts->array) {
TALLOC_FREE(dom_list);
return NT_STATUS_NO_MEMORY;
}
for (i = 0; i < num_domains; i++) {
struct netr_DomainTrust *trust;
struct dom_sid *sid;
struct winbindd_domain *dom;
dom = find_domain_from_name_noinit(dom_list[i].domain_name);
if (dom && dom->internal) {
continue;
}
trust = &trusts->array[trusts->count];
trust->netbios_name = talloc_strdup(trusts->array, dom_list[i].domain_name);
trust->dns_name = talloc_strdup(trusts->array, dom_list[i].dns_name);
sid = talloc(trusts->array, struct dom_sid);
if (!trust->netbios_name || !trust->dns_name ||
!sid) {
TALLOC_FREE(dom_list);
TALLOC_FREE(trusts->array);
return NT_STATUS_NO_MEMORY;
}
trust->trust_flags = dom_list[i].trust_flags;
trust->trust_attributes = dom_list[i].trust_attribs;
trust->trust_type = dom_list[i].trust_type;
sid_copy(sid, &dom_list[i].sid);
trust->sid = sid;
trusts->count++;
}
TALLOC_FREE(dom_list);
return NT_STATUS_OK;
do_query:
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("trusted_domains: [Cached] - doing backend query for info for domain %s\n",
domain->name ));
status = domain->backend->trusted_domains(domain, mem_ctx, trusts);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (!domain->internal &&
!domain->online &&
old_status) {
retval = wcache_tdc_fetch_list(&dom_list, &num_domains);
if (retval && num_domains && dom_list) {
TALLOC_FREE(trusts->array);
trusts->count = 0;
goto do_fetch_cache;
}
}
}
/* no trusts gives NT_STATUS_NO_MORE_ENTRIES resetting to NT_STATUS_OK
* so that the generic centry handling still applies correctly -
* Guenther*/
if (!NT_STATUS_IS_ERR(status)) {
status = NT_STATUS_OK;
}
return status;
}
/* get lockout policy */
NTSTATUS wb_cache_lockout_policy(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
struct samr_DomInfo12 *policy)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
bool old_status;
old_status = domain->online;
if (!cache->tdb)
goto do_query;
centry = wcache_fetch(cache, domain, "LOC_POL/%s", domain->name);
if (!centry)
goto do_query;
do_fetch_cache:
policy->lockout_duration = centry_nttime(centry);
policy->lockout_window = centry_nttime(centry);
policy->lockout_threshold = centry_uint16(centry);
status = centry->status;
DEBUG(10,("lockout_policy: [Cached] - cached info for domain %s status: %s\n",
domain->name, nt_errstr(status) ));
centry_free(centry);
return status;
do_query:
ZERO_STRUCTP(policy);
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("lockout_policy: [Cached] - doing backend query for info for domain %s\n",
domain->name ));
status = domain->backend->lockout_policy(domain, mem_ctx, policy);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (cache->tdb &&
!domain->internal &&
!domain->online &&
old_status) {
centry = wcache_fetch(cache, domain, "LOC_POL/%s", domain->name);
if (centry) {
goto do_fetch_cache;
}
}
}
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
wcache_save_lockout_policy(domain, status, policy);
return status;
}
/* get password policy */
NTSTATUS wb_cache_password_policy(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
struct samr_DomInfo1 *policy)
{
struct winbind_cache *cache = get_cache(domain);
struct cache_entry *centry = NULL;
NTSTATUS status;
bool old_status;
old_status = domain->online;
if (!cache->tdb)
goto do_query;
centry = wcache_fetch(cache, domain, "PWD_POL/%s", domain->name);
if (!centry)
goto do_query;
do_fetch_cache:
policy->min_password_length = centry_uint16(centry);
policy->password_history_length = centry_uint16(centry);
policy->password_properties = centry_uint32(centry);
policy->max_password_age = centry_nttime(centry);
policy->min_password_age = centry_nttime(centry);
status = centry->status;
DEBUG(10,("lockout_policy: [Cached] - cached info for domain %s status: %s\n",
domain->name, nt_errstr(status) ));
centry_free(centry);
return status;
do_query:
ZERO_STRUCTP(policy);
/* Return status value returned by seq number check */
if (!NT_STATUS_IS_OK(domain->last_status))
return domain->last_status;
DEBUG(10,("password_policy: [Cached] - doing backend query for info for domain %s\n",
domain->name ));
status = domain->backend->password_policy(domain, mem_ctx, policy);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
if (!domain->internal && old_status) {
set_domain_offline(domain);
}
if (cache->tdb &&
!domain->internal &&
!domain->online &&
old_status) {
centry = wcache_fetch(cache, domain, "PWD_POL/%s", domain->name);
if (centry) {
goto do_fetch_cache;
}
}
}
/* and save it */
refresh_sequence_number(domain);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
wcache_save_password_policy(domain, status, policy);
return status;
}
/* Invalidate cached user and group lists coherently */
static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
void *state)
{
if (strncmp((const char *)kbuf.dptr, "UL/", 3) == 0 ||
strncmp((const char *)kbuf.dptr, "GL/", 3) == 0)
tdb_delete(the_tdb, kbuf);
return 0;
}
/* Invalidate the getpwnam and getgroups entries for a winbindd domain */
void wcache_invalidate_samlogon(struct winbindd_domain *domain,
const struct dom_sid *sid)
{
fstring key_str, sid_string;
struct winbind_cache *cache;
/* don't clear cached U/SID and UG/SID entries when we want to logon
* offline - gd */
if (lp_winbind_offline_logon()) {
return;
}
if (!domain)
return;
cache = get_cache(domain);
if (!cache->tdb) {
return;
}
/* Clear U/SID cache entry */
fstr_sprintf(key_str, "U/%s", sid_to_fstring(sid_string, sid));
DEBUG(10, ("wcache_invalidate_samlogon: clearing %s\n", key_str));
tdb_delete(cache->tdb, string_tdb_data(key_str));
/* Clear UG/SID cache entry */
fstr_sprintf(key_str, "UG/%s", sid_to_fstring(sid_string, sid));
DEBUG(10, ("wcache_invalidate_samlogon: clearing %s\n", key_str));
tdb_delete(cache->tdb, string_tdb_data(key_str));
/* Samba/winbindd never needs this. */
netsamlogon_clear_cached_user(sid);
}
bool wcache_invalidate_cache(void)
{
struct winbindd_domain *domain;
for (domain = domain_list(); domain; domain = domain->next) {
struct winbind_cache *cache = get_cache(domain);
DEBUG(10, ("wcache_invalidate_cache: invalidating cache "
"entries for %s\n", domain->name));
if (cache) {
if (cache->tdb) {
tdb_traverse(cache->tdb, traverse_fn, NULL);
} else {
return false;
}
}
}
return true;
}
bool wcache_invalidate_cache_noinit(void)
{
struct winbindd_domain *domain;
for (domain = domain_list(); domain; domain = domain->next) {
struct winbind_cache *cache;
/* Skip uninitialized domains. */
if (!domain->initialized && !domain->internal) {
continue;
}
cache = get_cache(domain);
DEBUG(10, ("wcache_invalidate_cache: invalidating cache "
"entries for %s\n", domain->name));
if (cache) {
if (cache->tdb) {
tdb_traverse(cache->tdb, traverse_fn, NULL);
/*
* Flushing cache has nothing to with domains.
* return here if we successfully flushed once.
* To avoid unnecessary traversing the cache.
*/
return true;
} else {
return false;
}
}
}
return true;
}
static bool init_wcache(void)
{
char *db_path;
if (wcache == NULL) {
wcache = SMB_XMALLOC_P(struct winbind_cache);
ZERO_STRUCTP(wcache);
}
if (wcache->tdb != NULL)
return true;
db_path = wcache_path();
if (db_path == NULL) {
return false;
}
/* when working offline we must not clear the cache on restart */
wcache->tdb = tdb_open_log(db_path,
WINBINDD_CACHE_TDB_DEFAULT_HASH_SIZE,
TDB_INCOMPATIBLE_HASH |
(lp_winbind_offline_logon() ? TDB_DEFAULT : (TDB_DEFAULT | TDB_CLEAR_IF_FIRST)),
O_RDWR|O_CREAT, 0600);
TALLOC_FREE(db_path);
if (wcache->tdb == NULL) {
DEBUG(0,("Failed to open winbindd_cache.tdb!\n"));
return false;
}
return true;
}
/************************************************************************
This is called by the parent to initialize the cache file.
We don't need sophisticated locking here as we know we're the
only opener.
************************************************************************/
bool initialize_winbindd_cache(void)
{
bool cache_bad = true;
uint32_t vers;
if (!init_wcache()) {
DEBUG(0,("initialize_winbindd_cache: init_wcache failed.\n"));
return false;
}
/* Check version number. */
if (tdb_fetch_uint32(wcache->tdb, WINBINDD_CACHE_VERSION_KEYSTR, &vers) &&
vers == WINBINDD_CACHE_VERSION) {
cache_bad = false;
}
if (cache_bad) {
char *db_path;
DEBUG(0,("initialize_winbindd_cache: clearing cache "
"and re-creating with version number %d\n",
WINBINDD_CACHE_VERSION ));
tdb_close(wcache->tdb);
wcache->tdb = NULL;
db_path = wcache_path();
if (db_path == NULL) {
return false;
}
if (unlink(db_path) == -1) {
DEBUG(0,("initialize_winbindd_cache: unlink %s failed %s ",
db_path,
strerror(errno) ));
TALLOC_FREE(db_path);
return false;
}
TALLOC_FREE(db_path);
if (!init_wcache()) {
DEBUG(0,("initialize_winbindd_cache: re-initialization "
"init_wcache failed.\n"));
return false;
}
/* Write the version. */
if (!tdb_store_uint32(wcache->tdb, WINBINDD_CACHE_VERSION_KEYSTR, WINBINDD_CACHE_VERSION)) {
DEBUG(0,("initialize_winbindd_cache: version number store failed %s\n",
tdb_errorstr(wcache->tdb) ));
return false;
}
}
tdb_close(wcache->tdb);
wcache->tdb = NULL;
return true;
}
void close_winbindd_cache(void)
{
if (!wcache) {
return;
}
if (wcache->tdb) {
tdb_close(wcache->tdb);
wcache->tdb = NULL;
}
}
bool lookup_cached_sid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
char **domain_name, char **name,
enum lsa_SidType *type)
{
struct winbindd_domain *domain;
NTSTATUS status;
domain = find_lookup_domain_from_sid(sid);
if (domain == NULL) {
return false;
}
status = wcache_sid_to_name(domain, sid, mem_ctx, domain_name, name,
type);
return NT_STATUS_IS_OK(status);
}
bool lookup_cached_name(const char *namespace,
const char *domain_name,
const char *name,
struct dom_sid *sid,
enum lsa_SidType *type)
{
struct winbindd_domain *domain;
NTSTATUS status;
bool original_online_state;
domain = find_lookup_domain_from_name(namespace);
if (domain == NULL) {
return false;
}
/* If we are doing a cached logon, temporarily set the domain
offline so the cache won't expire the entry */
original_online_state = domain->online;
domain->online = false;
status = wcache_name_to_sid(domain, domain_name, name, sid, type);
domain->online = original_online_state;
return NT_STATUS_IS_OK(status);
}
/*
* Cache a name to sid without checking the sequence number.
* Used when caching from a trusted PAC.
*/
void cache_name2sid_trusted(struct winbindd_domain *domain,
const char *domain_name,
const char *name,
enum lsa_SidType type,
const struct dom_sid *sid)
{
/*
* Ensure we store the mapping with the
* existing sequence number from the cache.
*/
get_cache(domain);
(void)fetch_cache_seqnum(domain, time(NULL));
wcache_save_name_to_sid(domain,
NT_STATUS_OK,
domain_name,
name,
sid,
type);
}
void cache_name2sid(struct winbindd_domain *domain,
const char *domain_name, const char *name,
enum lsa_SidType type, const struct dom_sid *sid)
{
refresh_sequence_number(domain);
wcache_save_name_to_sid(domain, NT_STATUS_OK, domain_name, name,
sid, type);
}
/*
* The original idea that this cache only contains centries has
* been blurred - now other stuff gets put in here. Ensure we
* ignore these things on cleanup.
*/
static int traverse_fn_cleanup(TDB_CONTEXT *the_tdb, TDB_DATA kbuf,
TDB_DATA dbuf, void *state)
{
struct cache_entry *centry;
if (is_non_centry_key(kbuf)) {
return 0;
}
centry = wcache_fetch_raw((char *)kbuf.dptr);
if (!centry) {
return 0;
}
if (!NT_STATUS_IS_OK(centry->status)) {
DEBUG(10,("deleting centry %s\n", (const char *)kbuf.dptr));
tdb_delete(the_tdb, kbuf);
}
centry_free(centry);
return 0;
}
/* flush the cache */
static void wcache_flush_cache(void)
{
char *db_path;
if (!wcache)
return;
if (wcache->tdb) {
tdb_close(wcache->tdb);
wcache->tdb = NULL;
}
if (!winbindd_use_cache()) {
return;
}
db_path = wcache_path();
if (db_path == NULL) {
return;
}
/* when working offline we must not clear the cache on restart */
wcache->tdb = tdb_open_log(db_path,
WINBINDD_CACHE_TDB_DEFAULT_HASH_SIZE,
TDB_INCOMPATIBLE_HASH |
(lp_winbind_offline_logon() ? TDB_DEFAULT : (TDB_DEFAULT | TDB_CLEAR_IF_FIRST)),
O_RDWR|O_CREAT, 0600);
TALLOC_FREE(db_path);
if (!wcache->tdb) {
DEBUG(0,("Failed to open winbindd_cache.tdb!\n"));
return;
}
tdb_traverse(wcache->tdb, traverse_fn_cleanup, NULL);
DEBUG(10,("wcache_flush_cache success\n"));
}
/* Count cached creds */
static int traverse_fn_cached_creds(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
void *state)
{
int *cred_count = (int*)state;
if (strncmp((const char *)kbuf.dptr, "CRED/", 5) == 0) {
(*cred_count)++;
}
return 0;
}
NTSTATUS wcache_count_cached_creds(struct winbindd_domain *domain, int *count)
{
struct winbind_cache *cache = get_cache(domain);
*count = 0;
if (!cache->tdb) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
tdb_traverse(cache->tdb, traverse_fn_cached_creds, (void *)count);
return NT_STATUS_OK;
}
struct cred_list {
struct cred_list *prev, *next;
TDB_DATA key;
fstring name;
time_t created;
};
static struct cred_list *wcache_cred_list;
static int traverse_fn_get_credlist(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
void *state)
{
struct cred_list *cred;
if (strncmp((const char *)kbuf.dptr, "CRED/", 5) == 0) {
cred = SMB_MALLOC_P(struct cred_list);
if (cred == NULL) {
DEBUG(0,("traverse_fn_remove_first_creds: failed to malloc new entry for list\n"));
return -1;
}
ZERO_STRUCTP(cred);
/* save a copy of the key */
fstrcpy(cred->name, (const char *)kbuf.dptr);
DLIST_ADD(wcache_cred_list, cred);
}
return 0;
}
NTSTATUS wcache_remove_oldest_cached_creds(struct winbindd_domain *domain, const struct dom_sid *sid)
{
struct winbind_cache *cache = get_cache(domain);
NTSTATUS status;
int ret;
struct cred_list *cred, *next, *oldest = NULL;
if (!cache->tdb) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
/* we possibly already have an entry */
if (sid && NT_STATUS_IS_OK(wcache_cached_creds_exist(domain, sid))) {
fstring key_str, tmp;
DEBUG(11,("we already have an entry, deleting that\n"));
fstr_sprintf(key_str, "CRED/%s", sid_to_fstring(tmp, sid));
tdb_delete(cache->tdb, string_tdb_data(key_str));
return NT_STATUS_OK;
}
ret = tdb_traverse(cache->tdb, traverse_fn_get_credlist, NULL);
if (ret == 0) {
return NT_STATUS_OK;
} else if ((ret < 0) || (wcache_cred_list == NULL)) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
ZERO_STRUCTP(oldest);
for (cred = wcache_cred_list; cred; cred = cred->next) {
TDB_DATA data;
time_t t;
data = tdb_fetch(cache->tdb, string_tdb_data(cred->name));
if (!data.dptr) {
DEBUG(10,("wcache_remove_oldest_cached_creds: entry for [%s] not found\n",
cred->name));
status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
goto done;
}
t = IVAL(data.dptr, 0);
SAFE_FREE(data.dptr);
if (!oldest) {
oldest = SMB_MALLOC_P(struct cred_list);
if (oldest == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
fstrcpy(oldest->name, cred->name);
oldest->created = t;
continue;
}
if (t < oldest->created) {
fstrcpy(oldest->name, cred->name);
oldest->created = t;
}
}
if (tdb_delete(cache->tdb, string_tdb_data(oldest->name)) == 0) {
status = NT_STATUS_OK;
} else {
status = NT_STATUS_UNSUCCESSFUL;
}
done:
for (cred = wcache_cred_list; cred; cred = next) {
next = cred->next;
DLIST_REMOVE(wcache_cred_list, cred);
SAFE_FREE(cred);
}
SAFE_FREE(oldest);
return status;
}
/* Change the global online/offline state. */
bool set_global_winbindd_state_offline(void)
{
TDB_DATA data;
DEBUG(10,("set_global_winbindd_state_offline: offline requested.\n"));
/* Only go offline if someone has created
the key "WINBINDD_OFFLINE" in the cache tdb. */
if (wcache == NULL || wcache->tdb == NULL) {
DEBUG(10,("set_global_winbindd_state_offline: wcache not open yet.\n"));
return false;
}
if (!lp_winbind_offline_logon()) {
DEBUG(10,("set_global_winbindd_state_offline: rejecting.\n"));
return false;
}
if (global_winbindd_offline_state) {
/* Already offline. */
return true;
}
data = tdb_fetch_bystring( wcache->tdb, "WINBINDD_OFFLINE" );
if (!data.dptr || data.dsize != 4) {
DEBUG(10,("set_global_winbindd_state_offline: offline state not set.\n"));
SAFE_FREE(data.dptr);
return false;
} else {
DEBUG(10,("set_global_winbindd_state_offline: offline state set.\n"));
global_winbindd_offline_state = true;
SAFE_FREE(data.dptr);
return true;
}
}
void set_global_winbindd_state_online(void)
{
DEBUG(10,("set_global_winbindd_state_online: online requested.\n"));
if (!lp_winbind_offline_logon()) {
DEBUG(10,("set_global_winbindd_state_online: rejecting.\n"));
return;
}
if (!global_winbindd_offline_state) {
/* Already online. */
return;
}
global_winbindd_offline_state = false;
if (!wcache->tdb) {
return;
}
/* Ensure there is no key "WINBINDD_OFFLINE" in the cache tdb. */
tdb_delete_bystring(wcache->tdb, "WINBINDD_OFFLINE");
}
bool get_global_winbindd_state_offline(void)
{
return global_winbindd_offline_state;
}
/***********************************************************************
Validate functions for all possible cache tdb keys.
***********************************************************************/
static struct cache_entry *create_centry_validate(const char *kstr, TDB_DATA data,
struct tdb_validation_status *state)
{
struct cache_entry *centry;
centry = SMB_XMALLOC_P(struct cache_entry);
centry->data = (unsigned char *)smb_memdup(data.dptr, data.dsize);
if (!centry->data) {
SAFE_FREE(centry);
return NULL;
}
centry->len = data.dsize;
centry->ofs = 0;
if (centry->len < 16) {
/* huh? corrupt cache? */
DEBUG(0,("create_centry_validate: Corrupt cache for key %s "
"(len < 16) ?\n", kstr));
centry_free(centry);
state->bad_entry = true;
state->success = false;
return NULL;
}
centry->status = NT_STATUS(centry_uint32(centry));
centry->sequence_number = centry_uint32(centry);
centry->timeout = centry_uint64_t(centry);
return centry;
}
static int validate_seqnum(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
if (dbuf.dsize != 8) {
DEBUG(0,("validate_seqnum: Corrupt cache for key %s (len %u != 8) ?\n",
keystr, (unsigned int)dbuf.dsize ));
state->bad_entry = true;
return 1;
}
return 0;
}
static int validate_u(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
struct dom_sid sid;
if (!centry) {
return 1;
}
(void)centry_string(centry, mem_ctx);
(void)centry_string(centry, mem_ctx);
(void)centry_string(centry, mem_ctx);
(void)centry_string(centry, mem_ctx);
(void)centry_string(centry, mem_ctx);
(void)centry_uint32(centry);
(void)centry_uint32(centry);
(void)centry_string(centry, mem_ctx);
(void)centry_sid(centry, &sid);
(void)centry_sid(centry, &sid);
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_u: %s ok\n", keystr));
return 0;
}
static int validate_loc_pol(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
if (!centry) {
return 1;
}
(void)centry_nttime(centry);
(void)centry_nttime(centry);
(void)centry_uint16(centry);
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_loc_pol: %s ok\n", keystr));
return 0;
}
static int validate_pwd_pol(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
if (!centry) {
return 1;
}
(void)centry_uint16(centry);
(void)centry_uint16(centry);
(void)centry_uint32(centry);
(void)centry_nttime(centry);
(void)centry_nttime(centry);
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_pwd_pol: %s ok\n", keystr));
return 0;
}
static int validate_cred(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
if (!centry) {
return 1;
}
(void)centry_time(centry);
(void)centry_hash16(centry, mem_ctx);
/* We only have 17 bytes more data in the salted cred case. */
if (centry->len - centry->ofs == 17) {
(void)centry_hash16(centry, mem_ctx);
}
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_cred: %s ok\n", keystr));
return 0;
}
static int validate_ul(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
int32_t num_entries, i;
if (!centry) {
return 1;
}
num_entries = (int32_t)centry_uint32(centry);
for (i=0; i< num_entries; i++) {
(void)centry_uint32(centry);
}
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_ul: %s ok\n", keystr));
return 0;
}
static int validate_gl(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
int32_t num_entries, i;
if (!centry) {
return 1;
}
num_entries = centry_uint32(centry);
for (i=0; i< num_entries; i++) {
(void)centry_string(centry, mem_ctx);
(void)centry_string(centry, mem_ctx);
(void)centry_uint32(centry);
}
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_gl: %s ok\n", keystr));
return 0;
}
static int validate_ug(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
int32_t num_groups, i;
if (!centry) {
return 1;
}
num_groups = centry_uint32(centry);
for (i=0; i< num_groups; i++) {
struct dom_sid sid;
centry_sid(centry, &sid);
}
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_ug: %s ok\n", keystr));
return 0;
}
static int validate_ua(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
int32_t num_aliases, i;
if (!centry) {
return 1;
}
num_aliases = centry_uint32(centry);
for (i=0; i < num_aliases; i++) {
(void)centry_uint32(centry);
}
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_ua: %s ok\n", keystr));
return 0;
}
static int validate_gm(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
int32_t num_names, i;
if (!centry) {
return 1;
}
num_names = centry_uint32(centry);
for (i=0; i< num_names; i++) {
struct dom_sid sid;
centry_sid(centry, &sid);
(void)centry_string(centry, mem_ctx);
(void)centry_uint32(centry);
}
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_gm: %s ok\n", keystr));
return 0;
}
static int validate_dr(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
/* Can't say anything about this other than must be nonzero. */
if (dbuf.dsize == 0) {
DEBUG(0,("validate_dr: Corrupt cache for key %s (len == 0) ?\n",
keystr));
state->bad_entry = true;
state->success = false;
return 1;
}
DEBUG(10,("validate_dr: %s ok\n", keystr));
return 0;
}
static int validate_de(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
/* Can't say anything about this other than must be nonzero. */
if (dbuf.dsize == 0) {
DEBUG(0,("validate_de: Corrupt cache for key %s (len == 0) ?\n",
keystr));
state->bad_entry = true;
state->success = false;
return 1;
}
DEBUG(10,("validate_de: %s ok\n", keystr));
return 0;
}
static int validate_nss_an(TALLOC_CTX *mem_ctx, const char *keystr,
TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
if (!centry) {
return 1;
}
(void)centry_string( centry, mem_ctx );
centry_free(centry);
if (!(state->success)) {
return 1;
}
DEBUG(10,("validate_pwinfo: %s ok\n", keystr));
return 0;
}
static int validate_nss_na(TALLOC_CTX *mem_ctx, const char *keystr,
TDB_DATA dbuf,
struct tdb_validation_status *state)
{
struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
if (!centry) {
return 1;
}
(void)centry_string( centry, mem_ctx );
centry_free(centry);
if (!(state->success)) {
return 1;
}
DBG_DEBUG("%s ok\n", keystr);
return 0;
}
static int validate_trustdomcache(TALLOC_CTX *mem_ctx, const char *keystr,
TDB_DATA dbuf,
struct tdb_validation_status *state)
{
if (dbuf.dsize == 0) {
DEBUG(0, ("validate_trustdomcache: Corrupt cache for "
"key %s (len ==0) ?\n", keystr));
state->bad_entry = true;
state->success = false;
return 1;
}
DEBUG(10, ("validate_trustdomcache: %s ok\n", keystr));
DEBUGADD(10, (" Don't trust me, I am a DUMMY!\n"));
return 0;
}
static int validate_offline(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
if (dbuf.dsize != 4) {
DEBUG(0,("validate_offline: Corrupt cache for key %s (len %u != 4) ?\n",
keystr, (unsigned int)dbuf.dsize ));
state->bad_entry = true;
state->success = false;
return 1;
}
DEBUG(10,("validate_offline: %s ok\n", keystr));
return 0;
}
static int validate_ndr(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
/*
* Ignore validation for now. The proper way to do this is with a
* checksum. Just pure parsing does not really catch much.
*/
return 0;
}
static int validate_cache_version(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
struct tdb_validation_status *state)
{
if (dbuf.dsize != 4) {
DEBUG(0, ("validate_cache_version: Corrupt cache for "
"key %s (len %u != 4) ?\n",
keystr, (unsigned int)dbuf.dsize));
state->bad_entry = true;
state->success = false;
return 1;
}
DEBUG(10, ("validate_cache_version: %s ok\n", keystr));
return 0;
}
/***********************************************************************
A list of all possible cache tdb keys with associated validation
functions.
***********************************************************************/
struct key_val_struct {
const char *keyname;
int (*validate_data_fn)(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf, struct tdb_validation_status* state);
} key_val[] = {
{"SEQNUM/", validate_seqnum},
{"U/", validate_u},
{"LOC_POL/", validate_loc_pol},
{"PWD_POL/", validate_pwd_pol},
{"CRED/", validate_cred},
{"UL/", validate_ul},
{"GL/", validate_gl},
{"UG/", validate_ug},
{"UA", validate_ua},
{"GM/", validate_gm},
{"DR/", validate_dr},
{"DE/", validate_de},
{"TRUSTDOMCACHE/", validate_trustdomcache},
{"NSS/NA/", validate_nss_na},
{"NSS/AN/", validate_nss_an},
{"WINBINDD_OFFLINE", validate_offline},
{"NDR/", validate_ndr},
{WINBINDD_CACHE_VERSION_KEYSTR, validate_cache_version},
{NULL, NULL}
};
/***********************************************************************
Function to look at every entry in the tdb and validate it as far as
possible.
***********************************************************************/
static int cache_traverse_validate_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void *state)
{
int i;
unsigned int max_key_len = 1024;
struct tdb_validation_status *v_state = (struct tdb_validation_status *)state;
/* Paranoia check. */
if (strncmp("UA/", (const char *)kbuf.dptr, 3) == 0 ||
strncmp("NDR/", (const char *)kbuf.dptr, 4) == 0) {
max_key_len = 1024 * 1024;
}
if (kbuf.dsize > max_key_len) {
DEBUG(0, ("cache_traverse_validate_fn: key length too large: "
"(%u) > (%u)\n\n",
(unsigned int)kbuf.dsize, (unsigned int)max_key_len));
return 1;
}
for (i = 0; key_val[i].keyname; i++) {
size_t namelen = strlen(key_val[i].keyname);
if (kbuf.dsize >= namelen && (
strncmp(key_val[i].keyname, (const char *)kbuf.dptr, namelen)) == 0) {
TALLOC_CTX *mem_ctx;
char *keystr;
int ret;
keystr = SMB_MALLOC_ARRAY(char, kbuf.dsize+1);
if (!keystr) {
return 1;
}
memcpy(keystr, kbuf.dptr, kbuf.dsize);
keystr[kbuf.dsize] = '\0';
mem_ctx = talloc_init("validate_ctx");
if (!mem_ctx) {
SAFE_FREE(keystr);
return 1;
}
ret = key_val[i].validate_data_fn(mem_ctx, keystr, dbuf,
v_state);
SAFE_FREE(keystr);
talloc_destroy(mem_ctx);
return ret;
}
}
DEBUG(0,("cache_traverse_validate_fn: unknown cache entry\nkey :\n"));
dump_data(0, (uint8_t *)kbuf.dptr, kbuf.dsize);
DEBUG(0,("data :\n"));
dump_data(0, (uint8_t *)dbuf.dptr, dbuf.dsize);
v_state->unknown_key = true;
v_state->success = false;
return 1; /* terminate. */
}
static void validate_panic(const char *const why)
{
DEBUG(0,("validating cache: would panic %s\n", why ));
DEBUGADD(0, ("exiting instead (cache validation mode)\n"));
exit(47);
}
static int wbcache_update_centry_fn(TDB_CONTEXT *tdb,
TDB_DATA key,
TDB_DATA data,
void *state)
{
uint64_t ctimeout;
TDB_DATA blob;
if (is_non_centry_key(key)) {
return 0;
}
if (data.dptr == NULL || data.dsize == 0) {
if (tdb_delete(tdb, key) < 0) {
DEBUG(0, ("tdb_delete for [%s] failed!\n",
key.dptr));
return 1;
}
}
/* add timeout to blob (uint64_t) */
blob.dsize = data.dsize + 8;
blob.dptr = SMB_XMALLOC_ARRAY(uint8_t, blob.dsize);
if (blob.dptr == NULL) {
return 1;
}
memset(blob.dptr, 0, blob.dsize);
/* copy status and seqnum */
memcpy(blob.dptr, data.dptr, 8);
/* add timeout */
ctimeout = lp_winbind_cache_time() + time(NULL);
SBVAL(blob.dptr, 8, ctimeout);
/* copy the rest */
memcpy(blob.dptr + 16, data.dptr + 8, data.dsize - 8);
if (tdb_store(tdb, key, blob, TDB_REPLACE) < 0) {
DEBUG(0, ("tdb_store to update [%s] failed!\n",
key.dptr));
SAFE_FREE(blob.dptr);
return 1;
}
SAFE_FREE(blob.dptr);
return 0;
}
static bool wbcache_upgrade_v1_to_v2(TDB_CONTEXT *tdb)
{
int rc;
DEBUG(1, ("Upgrade to version 2 of the winbindd_cache.tdb\n"));
rc = tdb_traverse(tdb, wbcache_update_centry_fn, NULL);
if (rc < 0) {
return false;
}
return true;
}
/***********************************************************************
Try and validate every entry in the winbindd cache. If we fail here,
delete the cache tdb and return non-zero.
***********************************************************************/
int winbindd_validate_cache(void)
{
int ret = -1;
char *tdb_path = NULL;
TDB_CONTEXT *tdb = NULL;
uint32_t vers_id;
bool ok;
DEBUG(10, ("winbindd_validate_cache: replacing panic function\n"));
smb_panic_fn = validate_panic;
tdb_path = wcache_path();
if (tdb_path == NULL) {
goto done;
}
tdb = tdb_open_log(tdb_path,
WINBINDD_CACHE_TDB_DEFAULT_HASH_SIZE,
TDB_INCOMPATIBLE_HASH |
( lp_winbind_offline_logon()
? TDB_DEFAULT
: TDB_DEFAULT | TDB_CLEAR_IF_FIRST ),
O_RDWR|O_CREAT,
0600);
if (!tdb) {
DEBUG(0, ("winbindd_validate_cache: "
"error opening/initializing tdb\n"));
goto done;
}
/* Version check and upgrade code. */
if (!tdb_fetch_uint32(tdb, WINBINDD_CACHE_VERSION_KEYSTR, &vers_id)) {
DEBUG(10, ("Fresh database\n"));
tdb_store_uint32(tdb, WINBINDD_CACHE_VERSION_KEYSTR, WINBINDD_CACHE_VERSION);
vers_id = WINBINDD_CACHE_VERSION;
}
if (vers_id != WINBINDD_CACHE_VERSION) {
if (vers_id == WINBINDD_CACHE_VER1) {
ok = wbcache_upgrade_v1_to_v2(tdb);
if (!ok) {
DEBUG(10, ("winbindd_validate_cache: upgrade to version 2 failed.\n"));
unlink(tdb_path);
goto done;
}
tdb_store_uint32(tdb,
WINBINDD_CACHE_VERSION_KEYSTR,
WINBINDD_CACHE_VERSION);
vers_id = WINBINDD_CACHE_VER2;
}
}
tdb_close(tdb);
ret = tdb_validate_and_backup(tdb_path, cache_traverse_validate_fn);
if (ret != 0) {
DEBUG(10, ("winbindd_validate_cache: validation not successful.\n"));
DEBUGADD(10, ("removing tdb %s.\n", tdb_path));
unlink(tdb_path);
}
done:
TALLOC_FREE(tdb_path);
DEBUG(10, ("winbindd_validate_cache: restoring panic function\n"));
smb_panic_fn = smb_panic;
return ret;
}
/***********************************************************************
Try and validate every entry in the winbindd cache.
***********************************************************************/
int winbindd_validate_cache_nobackup(void)
{
int ret = -1;
char *tdb_path;
DEBUG(10, ("winbindd_validate_cache: replacing panic function\n"));
smb_panic_fn = validate_panic;
tdb_path = wcache_path();
if (tdb_path == NULL) {
goto err_panic_restore;
}
if (wcache == NULL || wcache->tdb == NULL) {
ret = tdb_validate_open(tdb_path, cache_traverse_validate_fn);
} else {
ret = tdb_validate(wcache->tdb, cache_traverse_validate_fn);
}
if (ret != 0) {
DEBUG(10, ("winbindd_validate_cache_nobackup: validation not "
"successful.\n"));
}
TALLOC_FREE(tdb_path);
err_panic_restore:
DEBUG(10, ("winbindd_validate_cache_nobackup: restoring panic "
"function\n"));
smb_panic_fn = smb_panic;
return ret;
}
bool winbindd_cache_validate_and_initialize(void)
{
close_winbindd_cache();
if (lp_winbind_offline_logon()) {
if (winbindd_validate_cache() < 0) {
DEBUG(0, ("winbindd cache tdb corrupt and no backup "
"could be restored.\n"));
}
}
return initialize_winbindd_cache();
}
/*********************************************************************
********************************************************************/
static bool add_wbdomain_to_tdc_array( struct winbindd_domain *new_dom,
struct winbindd_tdc_domain **domains,
size_t *num_domains )
{
struct winbindd_tdc_domain *list = NULL;
size_t i, idx;
bool set_only = false;
/* don't allow duplicates */
idx = *num_domains;
list = *domains;
for ( i=0; i< (*num_domains); i++ ) {
if ( strequal( new_dom->name, list[i].domain_name ) ) {
DEBUG(10,("add_wbdomain_to_tdc_array: Found existing record for %s\n",
new_dom->name));
idx = i;
set_only = true;
break;
}
}
if ( !set_only ) {
if ( !*domains ) {
list = talloc_array( NULL, struct winbindd_tdc_domain, 1 );
idx = 0;
} else {
list = talloc_realloc( *domains, *domains,
struct winbindd_tdc_domain,
(*num_domains)+1);
idx = *num_domains;
}
ZERO_STRUCT( list[idx] );
}
if ( !list )
return false;
list[idx].domain_name = talloc_strdup(list, new_dom->name);
if (list[idx].domain_name == NULL) {
return false;
}
if (new_dom->alt_name != NULL) {
list[idx].dns_name = talloc_strdup(list, new_dom->alt_name);
if (list[idx].dns_name == NULL) {
return false;
}
}
if ( !is_null_sid( &new_dom->sid ) ) {
sid_copy( &list[idx].sid, &new_dom->sid );
} else {
sid_copy(&list[idx].sid, &global_sid_NULL);
}
if ( new_dom->domain_flags != 0x0 )
list[idx].trust_flags = new_dom->domain_flags;
if ( new_dom->domain_type != 0x0 )
list[idx].trust_type = new_dom->domain_type;
if ( new_dom->domain_trust_attribs != 0x0 )
list[idx].trust_attribs = new_dom->domain_trust_attribs;
if ( !set_only ) {
*domains = list;
*num_domains = idx + 1;
}
return true;
}
/*********************************************************************
********************************************************************/
static TDB_DATA make_tdc_key( const char *domain_name )
{
char *keystr = NULL;
TDB_DATA key = { NULL, 0 };
if ( !domain_name ) {
DEBUG(5,("make_tdc_key: Keyname workgroup is NULL!\n"));
return key;
}
if (asprintf( &keystr, "TRUSTDOMCACHE/%s", domain_name ) == -1) {
return key;
}
key = string_term_tdb_data(keystr);
return key;
}
/*********************************************************************
********************************************************************/
static int pack_tdc_domains( struct winbindd_tdc_domain *domains,
size_t num_domains,
unsigned char **buf )
{
unsigned char *buffer = NULL;
int len = 0;
int buflen = 0;
size_t i = 0;
DEBUG(10,("pack_tdc_domains: Packing %d trusted domains\n",
(int)num_domains));
buflen = 0;
again:
len = 0;
/* Store the number of array items first */
len += tdb_pack( buffer+len, buflen-len, "d",
num_domains );
/* now pack each domain trust record */
for ( i=0; i<num_domains; i++ ) {
fstring tmp;
if ( buflen > 0 ) {
DEBUG(10,("pack_tdc_domains: Packing domain %s (%s)\n",
domains[i].domain_name,
domains[i].dns_name ? domains[i].dns_name : "UNKNOWN" ));
}
len += tdb_pack( buffer+len, buflen-len, "fffddd",
domains[i].domain_name,
domains[i].dns_name ? domains[i].dns_name : "",
sid_to_fstring(tmp, &domains[i].sid),
domains[i].trust_flags,
domains[i].trust_attribs,
domains[i].trust_type );
}
if ( buflen < len ) {
SAFE_FREE(buffer);
if ( (buffer = SMB_MALLOC_ARRAY(unsigned char, len)) == NULL ) {
DEBUG(0,("pack_tdc_domains: failed to alloc buffer!\n"));
buflen = -1;
goto done;
}
buflen = len;
goto again;
}
*buf = buffer;
done:
return buflen;
}
/*********************************************************************
********************************************************************/
static size_t unpack_tdc_domains( unsigned char *buf, int buflen,
struct winbindd_tdc_domain **domains )
{
fstring domain_name, dns_name, sid_string;
uint32_t type, attribs, flags;
int num_domains;
int len = 0;
int i;
struct winbindd_tdc_domain *list = NULL;
/* get the number of domains */
len += tdb_unpack( buf+len, buflen-len, "d", &num_domains);
if ( len == -1 ) {
DEBUG(5,("unpack_tdc_domains: Failed to unpack domain array\n"));
return 0;
}
list = talloc_array( NULL, struct winbindd_tdc_domain, num_domains );
if ( !list ) {
DEBUG(0,("unpack_tdc_domains: Failed to talloc() domain list!\n"));
return 0;
}
for ( i=0; i<num_domains; i++ ) {
int this_len;
this_len = tdb_unpack( buf+len, buflen-len, "fffddd",
domain_name,
dns_name,
sid_string,
&flags,
&attribs,
&type );
if ( this_len == -1 ) {
DEBUG(5,("unpack_tdc_domains: Failed to unpack domain array\n"));
TALLOC_FREE( list );
return 0;
}
len += this_len;
DEBUG(11,("unpack_tdc_domains: Unpacking domain %s (%s) "
"SID %s, flags = 0x%x, attribs = 0x%x, type = 0x%x\n",
domain_name, dns_name, sid_string,
flags, attribs, type));
list[i].domain_name = talloc_strdup( list, domain_name );
list[i].dns_name = NULL;
if (dns_name[0] != '\0') {
list[i].dns_name = talloc_strdup(list, dns_name);
}
if ( !string_to_sid( &(list[i].sid), sid_string ) ) {
DEBUG(10,("unpack_tdc_domains: no SID for domain %s\n",
domain_name));
}
list[i].trust_flags = flags;
list[i].trust_attribs = attribs;
list[i].trust_type = type;
}
*domains = list;
return num_domains;
}
/*********************************************************************
********************************************************************/
static bool wcache_tdc_store_list( struct winbindd_tdc_domain *domains, size_t num_domains )
{
TDB_DATA key = make_tdc_key( lp_workgroup() );
TDB_DATA data = { NULL, 0 };
int ret;
if ( !key.dptr )
return false;
/* See if we were asked to delete the cache entry */
if ( !domains ) {
ret = tdb_delete( wcache->tdb, key );
goto done;
}
data.dsize = pack_tdc_domains( domains, num_domains, &data.dptr );
if ( !data.dptr ) {
ret = -1;
goto done;
}
ret = tdb_store( wcache->tdb, key, data, 0 );
done:
SAFE_FREE( data.dptr );
SAFE_FREE( key.dptr );
return ( ret == 0 );
}
/*********************************************************************
********************************************************************/
bool wcache_tdc_fetch_list( struct winbindd_tdc_domain **domains, size_t *num_domains )
{
TDB_DATA key = make_tdc_key( lp_workgroup() );
TDB_DATA data = { NULL, 0 };
*domains = NULL;
*num_domains = 0;
if ( !key.dptr )
return false;
data = tdb_fetch( wcache->tdb, key );
SAFE_FREE( key.dptr );
if ( !data.dptr )
return false;
*num_domains = unpack_tdc_domains( data.dptr, data.dsize, domains );
SAFE_FREE( data.dptr );
if ( !*domains )
return false;
return true;
}
/*********************************************************************
********************************************************************/
bool wcache_tdc_add_domain( struct winbindd_domain *domain )
{
struct winbindd_tdc_domain *dom_list = NULL;
size_t num_domains = 0;
bool ret = false;
DEBUG(10,("wcache_tdc_add_domain: Adding domain %s (%s), SID %s, "
"flags = 0x%x, attributes = 0x%x, type = 0x%x\n",
domain->name, domain->alt_name,
sid_string_dbg(&domain->sid),
domain->domain_flags,
domain->domain_trust_attribs,
domain->domain_type));
if ( !init_wcache() ) {
return false;
}
/* fetch the list */
wcache_tdc_fetch_list( &dom_list, &num_domains );
/* add the new domain */
if ( !add_wbdomain_to_tdc_array( domain, &dom_list, &num_domains ) ) {
goto done;
}
/* pack the domain */
if ( !wcache_tdc_store_list( dom_list, num_domains ) ) {
goto done;
}
/* Success */
ret = true;
done:
TALLOC_FREE( dom_list );
return ret;
}
static struct winbindd_tdc_domain *wcache_tdc_dup_domain(
TALLOC_CTX *mem_ctx, const struct winbindd_tdc_domain *src)
{
struct winbindd_tdc_domain *dst;
dst = talloc(mem_ctx, struct winbindd_tdc_domain);
if (dst == NULL) {
goto fail;
}
dst->domain_name = talloc_strdup(dst, src->domain_name);
if (dst->domain_name == NULL) {
goto fail;
}
dst->dns_name = NULL;
if (src->dns_name != NULL) {
dst->dns_name = talloc_strdup(dst, src->dns_name);
if (dst->dns_name == NULL) {
goto fail;
}
}
sid_copy(&dst->sid, &src->sid);
dst->trust_flags = src->trust_flags;
dst->trust_type = src->trust_type;
dst->trust_attribs = src->trust_attribs;
return dst;
fail:
TALLOC_FREE(dst);
return NULL;
}
/*********************************************************************
********************************************************************/
struct winbindd_tdc_domain * wcache_tdc_fetch_domain( TALLOC_CTX *ctx, const char *name )
{
struct winbindd_tdc_domain *dom_list = NULL;
size_t num_domains = 0;
size_t i;
struct winbindd_tdc_domain *d = NULL;
DEBUG(10,("wcache_tdc_fetch_domain: Searching for domain %s\n", name));
if ( !init_wcache() ) {
return NULL;
}
/* fetch the list */
wcache_tdc_fetch_list( &dom_list, &num_domains );
for ( i=0; i<num_domains; i++ ) {
if ( strequal(name, dom_list[i].domain_name) ||
strequal(name, dom_list[i].dns_name) )
{
DEBUG(10,("wcache_tdc_fetch_domain: Found domain %s\n",
name));
d = wcache_tdc_dup_domain(ctx, &dom_list[i]);
break;
}
}
TALLOC_FREE( dom_list );
return d;
}
/*********************************************************************
********************************************************************/
void wcache_tdc_clear( void )
{
if ( !init_wcache() )
return;
wcache_tdc_store_list( NULL, 0 );
return;
}
static bool wcache_ndr_key(TALLOC_CTX *mem_ctx, const char *domain_name,
uint32_t opnum, const DATA_BLOB *req,
TDB_DATA *pkey)
{
char *key;
size_t keylen;
key = talloc_asprintf(mem_ctx, "NDR/%s/%d/", domain_name, (int)opnum);
if (key == NULL) {
return false;
}
keylen = talloc_get_size(key) - 1;
key = talloc_realloc(mem_ctx, key, char, keylen + req->length);
if (key == NULL) {
return false;
}
memcpy(key + keylen, req->data, req->length);
pkey->dptr = (uint8_t *)key;
pkey->dsize = talloc_get_size(key);
return true;
}
static bool wcache_opnum_cacheable(uint32_t opnum)
{
switch (opnum) {
case NDR_WBINT_PING:
case NDR_WBINT_QUERYSEQUENCENUMBER:
case NDR_WBINT_ALLOCATEUID:
case NDR_WBINT_ALLOCATEGID:
case NDR_WBINT_CHECKMACHINEACCOUNT:
case NDR_WBINT_CHANGEMACHINEACCOUNT:
case NDR_WBINT_PINGDC:
return false;
}
return true;
}
bool wcache_fetch_ndr(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
uint32_t opnum, const DATA_BLOB *req, DATA_BLOB *resp)
{
TDB_DATA key, data;
bool ret = false;
if (!wcache_opnum_cacheable(opnum) ||
is_my_own_sam_domain(domain) ||
is_builtin_domain(domain)) {
return false;
}
if (wcache->tdb == NULL) {
return false;
}
if (!wcache_ndr_key(talloc_tos(), domain->name, opnum, req, &key)) {
return false;
}
data = tdb_fetch(wcache->tdb, key);
TALLOC_FREE(key.dptr);
if (data.dptr == NULL) {
return false;
}
if (data.dsize < 12) {
goto fail;
}
if (is_domain_online(domain)) {
uint32_t entry_seqnum, dom_seqnum, last_check;
uint64_t entry_timeout;
if (!wcache_fetch_seqnum(domain->name, &dom_seqnum,
&last_check)) {
goto fail;
}
entry_seqnum = IVAL(data.dptr, 0);
if (entry_seqnum != dom_seqnum) {
DEBUG(10, ("Entry has wrong sequence number: %d\n",
(int)entry_seqnum));
goto fail;
}
entry_timeout = BVAL(data.dptr, 4);
if (time(NULL) > (time_t)entry_timeout) {
DEBUG(10, ("Entry has timed out\n"));
goto fail;
}
}
resp->data = (uint8_t *)talloc_memdup(mem_ctx, data.dptr + 12,
data.dsize - 12);
if (resp->data == NULL) {
DEBUG(10, ("talloc failed\n"));
goto fail;
}
resp->length = data.dsize - 12;
ret = true;
fail:
SAFE_FREE(data.dptr);
return ret;
}
void wcache_store_ndr(struct winbindd_domain *domain, uint32_t opnum,
const DATA_BLOB *req, const DATA_BLOB *resp)
{
TDB_DATA key, data;
uint32_t dom_seqnum, last_check;
uint64_t timeout;
if (!wcache_opnum_cacheable(opnum) ||
is_my_own_sam_domain(domain) ||
is_builtin_domain(domain)) {
return;
}
if (wcache->tdb == NULL) {
return;
}
if (!wcache_fetch_seqnum(domain->name, &dom_seqnum, &last_check)) {
DEBUG(10, ("could not fetch seqnum for domain %s\n",
domain->name));
return;
}
if (!wcache_ndr_key(talloc_tos(), domain->name, opnum, req, &key)) {
return;
}
timeout = time(NULL) + lp_winbind_cache_time();
data.dsize = resp->length + 12;
data.dptr = talloc_array(key.dptr, uint8_t, data.dsize);
if (data.dptr == NULL) {
goto done;
}
SIVAL(data.dptr, 0, dom_seqnum);
SBVAL(data.dptr, 4, timeout);
memcpy(data.dptr + 12, resp->data, resp->length);
tdb_store(wcache->tdb, key, data, 0);
done:
TALLOC_FREE(key.dptr);
return;
}
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