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-rw-r--r--source3/passdb/pdb_tdb.c1369
1 files changed, 1369 insertions, 0 deletions
diff --git a/source3/passdb/pdb_tdb.c b/source3/passdb/pdb_tdb.c
new file mode 100644
index 0000000..f9ba193
--- /dev/null
+++ b/source3/passdb/pdb_tdb.c
@@ -0,0 +1,1369 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * SMB parameters and setup
+ * Copyright (C) Andrew Tridgell 1992-1998
+ * Copyright (C) Simo Sorce 2000-2003
+ * Copyright (C) Gerald Carter 2000-2006
+ * Copyright (C) Jeremy Allison 2001-2009
+ * Copyright (C) Andrew Bartlett 2002
+ * Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005
+ *
+ * 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 "passdb.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "../libcli/security/security.h"
+#include "util_tdb.h"
+#include "passdb/pdb_tdb.h"
+#include "lib/util/smb_strtox.h"
+#include "lib/util/string_wrappers.h"
+
+#if 0 /* when made a module use this */
+
+static int tdbsam_debug_level = DBGC_ALL;
+#undef DBGC_CLASS
+#define DBGC_CLASS tdbsam_debug_level
+
+#else
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
+
+#endif
+
+#define TDBSAM_VERSION 4 /* Most recent TDBSAM version */
+#define TDBSAM_MINOR_VERSION 0 /* Most recent TDBSAM minor version */
+#define TDBSAM_VERSION_STRING "INFO/version"
+#define TDBSAM_MINOR_VERSION_STRING "INFO/minor_version"
+#define PASSDB_FILE_NAME "passdb.tdb"
+#define USERPREFIX "USER_"
+#define USERPREFIX_LEN 5
+#define RIDPREFIX "RID_"
+#define PRIVPREFIX "PRIV_"
+#define NEXT_RID_STRING "NEXT_RID"
+
+/* GLOBAL TDB SAM CONTEXT */
+
+static struct db_context *db_sam;
+static char *tdbsam_filename;
+static bool map_builtin;
+
+struct tdbsam_convert_state {
+ int32_t from;
+ bool success;
+};
+
+static int tdbsam_convert_one(struct db_record *rec, void *priv)
+{
+ struct tdbsam_convert_state *state =
+ (struct tdbsam_convert_state *)priv;
+ struct samu *user;
+ TDB_DATA data;
+ NTSTATUS status;
+ bool ret;
+ TDB_DATA key;
+ TDB_DATA value;
+
+ key = dbwrap_record_get_key(rec);
+
+ if (key.dsize < USERPREFIX_LEN) {
+ return 0;
+ }
+ if (strncmp((char *)key.dptr, USERPREFIX, USERPREFIX_LEN) != 0) {
+ return 0;
+ }
+
+ user = samu_new(talloc_tos());
+ if (user == NULL) {
+ DEBUG(0,("tdbsam_convert: samu_new() failed!\n"));
+ state->success = false;
+ return -1;
+ }
+
+ DEBUG(10,("tdbsam_convert: Try unpacking a record with (key:%s) "
+ "(version:%d)\n", (char *)key.dptr, state->from));
+
+ value = dbwrap_record_get_value(rec);
+
+ switch (state->from) {
+ case 0:
+ ret = init_samu_from_buffer(user, SAMU_BUFFER_V0,
+ (uint8_t *)value.dptr,
+ value.dsize);
+ break;
+ case 1:
+ ret = init_samu_from_buffer(user, SAMU_BUFFER_V1,
+ (uint8_t *)value.dptr,
+ value.dsize);
+ break;
+ case 2:
+ ret = init_samu_from_buffer(user, SAMU_BUFFER_V2,
+ (uint8_t *)value.dptr,
+ value.dsize);
+ break;
+ case 3:
+ ret = init_samu_from_buffer(user, SAMU_BUFFER_V3,
+ (uint8_t *)value.dptr,
+ value.dsize);
+ break;
+ case 4:
+ ret = init_samu_from_buffer(user, SAMU_BUFFER_V4,
+ (uint8_t *)value.dptr,
+ value.dsize);
+ break;
+ default:
+ /* unknown tdbsam version */
+ ret = False;
+ }
+ if (!ret) {
+ DEBUG(0,("tdbsam_convert: Bad struct samu entry returned "
+ "from TDB (key:%s) (version:%d)\n", (char *)key.dptr,
+ state->from));
+ TALLOC_FREE(user);
+ state->success = false;
+ return -1;
+ }
+
+ data.dsize = init_buffer_from_samu(&data.dptr, user, false);
+ TALLOC_FREE(user);
+
+ if (data.dsize == -1) {
+ DEBUG(0,("tdbsam_convert: cannot pack the struct samu into "
+ "the new format\n"));
+ state->success = false;
+ return -1;
+ }
+
+ status = dbwrap_record_store(rec, data, TDB_MODIFY);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Could not store the new record: %s\n",
+ nt_errstr(status)));
+ state->success = false;
+ return -1;
+ }
+
+ return 0;
+}
+
+/**********************************************************************
+ Struct and function to backup an old record.
+ *********************************************************************/
+
+struct tdbsam_backup_state {
+ struct db_context *new_db;
+ bool success;
+};
+
+static int backup_copy_fn(struct db_record *orig_rec, void *state)
+{
+ struct tdbsam_backup_state *bs = (struct tdbsam_backup_state *)state;
+ struct db_record *new_rec;
+ NTSTATUS status;
+ TDB_DATA key;
+ TDB_DATA value;
+
+ key = dbwrap_record_get_key(orig_rec);
+
+ new_rec = dbwrap_fetch_locked(bs->new_db, talloc_tos(), key);
+ if (new_rec == NULL) {
+ bs->success = false;
+ return 1;
+ }
+
+ value = dbwrap_record_get_value(orig_rec);
+
+ status = dbwrap_record_store(new_rec, value, TDB_INSERT);
+
+ TALLOC_FREE(new_rec);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ bs->success = false;
+ return 1;
+ }
+ return 0;
+}
+
+/**********************************************************************
+ Make a backup of an old passdb and replace the new one with it. We
+ have to do this as between 3.0.x and 3.2.x the hash function changed
+ by mistake (used unsigned char * instead of char *). This means the
+ previous simple update code will fail due to not being able to find
+ existing records to replace in the tdbsam_convert_one() function. JRA.
+ *********************************************************************/
+
+static bool tdbsam_convert_backup(const char *dbname, struct db_context **pp_db)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ const char *tmp_fname = NULL;
+ struct db_context *tmp_db = NULL;
+ struct db_context *orig_db = *pp_db;
+ struct tdbsam_backup_state bs;
+ NTSTATUS status;
+
+ tmp_fname = talloc_asprintf(frame, "%s.tmp", dbname);
+ if (!tmp_fname) {
+ TALLOC_FREE(frame);
+ return false;
+ }
+
+ unlink(tmp_fname);
+
+ /* Remember to open this on the NULL context. We need
+ * it to stay around after we return from here. */
+
+ tmp_db = db_open(NULL, tmp_fname, 0,
+ TDB_DEFAULT, O_CREAT|O_RDWR, 0600,
+ DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+ if (tmp_db == NULL) {
+ DEBUG(0, ("tdbsam_convert_backup: Failed to create backup TDB passwd "
+ "[%s]\n", tmp_fname));
+ TALLOC_FREE(frame);
+ return false;
+ }
+
+ if (dbwrap_transaction_start(orig_db) != 0) {
+ DEBUG(0, ("tdbsam_convert_backup: Could not start transaction (1)\n"));
+ unlink(tmp_fname);
+ TALLOC_FREE(tmp_db);
+ TALLOC_FREE(frame);
+ return false;
+ }
+ if (dbwrap_transaction_start(tmp_db) != 0) {
+ DEBUG(0, ("tdbsam_convert_backup: Could not start transaction (2)\n"));
+ dbwrap_transaction_cancel(orig_db);
+ unlink(tmp_fname);
+ TALLOC_FREE(tmp_db);
+ TALLOC_FREE(frame);
+ return false;
+ }
+
+ bs.new_db = tmp_db;
+ bs.success = true;
+
+ status = dbwrap_traverse(orig_db, backup_copy_fn, (void *)&bs, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("tdbsam_convert_backup: traverse failed\n"));
+ goto cancel;
+ }
+
+ if (!bs.success) {
+ DEBUG(0, ("tdbsam_convert_backup: Rewriting records failed\n"));
+ goto cancel;
+ }
+
+ if (dbwrap_transaction_commit(orig_db) != 0) {
+ smb_panic("tdbsam_convert_backup: orig commit failed\n");
+ }
+ if (dbwrap_transaction_commit(tmp_db) != 0) {
+ smb_panic("tdbsam_convert_backup: orig commit failed\n");
+ }
+
+ /* be sure to close the DBs _before_ renaming the file */
+
+ TALLOC_FREE(orig_db);
+ TALLOC_FREE(tmp_db);
+
+ /* This is safe from other users as we know we're
+ * under a mutex here. */
+
+ if (rename(tmp_fname, dbname) == -1) {
+ DEBUG(0, ("tdbsam_convert_backup: rename of %s to %s failed %s\n",
+ tmp_fname,
+ dbname,
+ strerror(errno)));
+ smb_panic("tdbsam_convert_backup: replace passdb failed\n");
+ }
+
+ TALLOC_FREE(frame);
+
+ /* re-open the converted TDB */
+
+ orig_db = db_open(NULL, dbname, 0,
+ TDB_DEFAULT, O_CREAT|O_RDWR, 0600,
+ DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+ if (orig_db == NULL) {
+ DEBUG(0, ("tdbsam_convert_backup: Failed to re-open "
+ "converted passdb TDB [%s]\n", dbname));
+ return false;
+ }
+
+ DEBUG(1, ("tdbsam_convert_backup: updated %s file.\n",
+ dbname ));
+
+ /* Replace the global db pointer. */
+ *pp_db = orig_db;
+ return true;
+
+ cancel:
+
+ if (dbwrap_transaction_cancel(orig_db) != 0) {
+ smb_panic("tdbsam_convert: transaction_cancel failed");
+ }
+
+ if (dbwrap_transaction_cancel(tmp_db) != 0) {
+ smb_panic("tdbsam_convert: transaction_cancel failed");
+ }
+
+ unlink(tmp_fname);
+ TALLOC_FREE(tmp_db);
+ TALLOC_FREE(frame);
+ return false;
+}
+
+static bool tdbsam_upgrade_next_rid(struct db_context *db)
+{
+ TDB_CONTEXT *tdb;
+ uint32_t rid;
+ bool ok = false;
+ NTSTATUS status;
+ char *db_path;
+
+ status = dbwrap_fetch_uint32_bystring(db, NEXT_RID_STRING, &rid);
+ if (NT_STATUS_IS_OK(status)) {
+ return true;
+ }
+
+ db_path = state_path(talloc_tos(), "winbindd_idmap.tdb");
+ if (db_path == NULL) {
+ return false;
+ }
+
+ tdb = tdb_open_log(db_path, 0,
+ TDB_DEFAULT, O_RDONLY, 0644);
+ TALLOC_FREE(db_path);
+ if (tdb) {
+ ok = tdb_fetch_uint32(tdb, "RID_COUNTER", &rid);
+ if (!ok) {
+ rid = BASE_RID;
+ }
+ tdb_close(tdb);
+ } else {
+ rid = BASE_RID;
+ }
+
+ status = dbwrap_store_uint32_bystring(db, NEXT_RID_STRING, rid);
+ if (!NT_STATUS_IS_OK(status)) {
+ return false;
+ }
+
+ return true;
+}
+
+static bool tdbsam_convert(struct db_context **pp_db, const char *name, int32_t from)
+{
+ struct tdbsam_convert_state state;
+ struct db_context *db = NULL;
+ NTSTATUS status;
+
+ /* We only need the update backup for local db's. */
+ if (db_is_local(name) && !tdbsam_convert_backup(name, pp_db)) {
+ DEBUG(0, ("tdbsam_convert: Could not backup %s\n", name));
+ return false;
+ }
+
+ db = *pp_db;
+ state.from = from;
+ state.success = true;
+
+ if (dbwrap_transaction_start(db) != 0) {
+ DEBUG(0, ("tdbsam_convert: Could not start transaction\n"));
+ return false;
+ }
+
+ if (!tdbsam_upgrade_next_rid(db)) {
+ DEBUG(0, ("tdbsam_convert: tdbsam_upgrade_next_rid failed\n"));
+ goto cancel;
+ }
+
+ status = dbwrap_traverse(db, tdbsam_convert_one, &state, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("tdbsam_convert: traverse failed\n"));
+ goto cancel;
+ }
+
+ if (!state.success) {
+ DEBUG(0, ("tdbsam_convert: Converting records failed\n"));
+ goto cancel;
+ }
+
+ status = dbwrap_store_int32_bystring(db, TDBSAM_VERSION_STRING,
+ TDBSAM_VERSION);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("tdbsam_convert: Could not store tdbsam version: "
+ "%s\n", nt_errstr(status)));
+ goto cancel;
+ }
+
+ status = dbwrap_store_int32_bystring(db, TDBSAM_MINOR_VERSION_STRING,
+ TDBSAM_MINOR_VERSION);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("tdbsam_convert: Could not store tdbsam minor "
+ "version: %s\n", nt_errstr(status)));
+ goto cancel;
+ }
+
+ if (dbwrap_transaction_commit(db) != 0) {
+ DEBUG(0, ("tdbsam_convert: Could not commit transaction\n"));
+ return false;
+ }
+
+ return true;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db) != 0) {
+ smb_panic("tdbsam_convert: transaction_cancel failed");
+ }
+
+ return false;
+}
+
+/*********************************************************************
+ Open the tdbsam file based on the absolute path specified.
+ Uses a reference count to allow multiple open calls.
+*********************************************************************/
+
+static bool tdbsam_open( const char *name )
+{
+ int32_t version;
+ int32_t minor_version;
+ NTSTATUS status;
+
+ /* check if we are already open */
+
+ if ( db_sam ) {
+ return true;
+ }
+
+ /* Try to open tdb passwd. Create a new one if necessary */
+
+ db_sam = db_open(NULL, name, 0, TDB_DEFAULT, O_CREAT|O_RDWR, 0600,
+ DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+ if (db_sam == NULL) {
+ DEBUG(0, ("tdbsam_open: Failed to open/create TDB passwd "
+ "[%s]\n", name));
+ return false;
+ }
+
+ /* Check the version */
+ status = dbwrap_fetch_int32_bystring(db_sam, TDBSAM_VERSION_STRING,
+ &version);
+ if (!NT_STATUS_IS_OK(status)) {
+ version = 0; /* Version not found, assume version 0 */
+ }
+
+ /* Get the minor version */
+ status = dbwrap_fetch_int32_bystring(
+ db_sam, TDBSAM_MINOR_VERSION_STRING, &minor_version);
+ if (!NT_STATUS_IS_OK(status)) {
+ minor_version = 0; /* Minor version not found, assume 0 */
+ }
+
+ /* Compare the version */
+ if (version > TDBSAM_VERSION) {
+ /* Version more recent than the latest known */
+ DEBUG(0, ("tdbsam_open: unknown version => %d\n", version));
+ TALLOC_FREE(db_sam);
+ return false;
+ }
+
+ if ( version < TDBSAM_VERSION ||
+ (version == TDBSAM_VERSION &&
+ minor_version < TDBSAM_MINOR_VERSION) ) {
+ /*
+ * Ok - we think we're going to have to convert.
+ * Due to the backup process we now must do to
+ * upgrade we have to get a mutex and re-check
+ * the version. Someone else may have upgraded
+ * whilst we were checking.
+ */
+
+ struct named_mutex *mtx = grab_named_mutex(NULL,
+ "tdbsam_upgrade_mutex",
+ 600);
+
+ if (!mtx) {
+ DEBUG(0, ("tdbsam_open: failed to grab mutex.\n"));
+ TALLOC_FREE(db_sam);
+ return false;
+ }
+
+ /* Re-check the version */
+ status = dbwrap_fetch_int32_bystring(
+ db_sam, TDBSAM_VERSION_STRING, &version);
+ if (!NT_STATUS_IS_OK(status)) {
+ version = 0; /* Version not found, assume version 0 */
+ }
+
+ /* Re-check the minor version */
+ status = dbwrap_fetch_int32_bystring(
+ db_sam, TDBSAM_MINOR_VERSION_STRING, &minor_version);
+ if (!NT_STATUS_IS_OK(status)) {
+ minor_version = 0; /* Minor version not found, assume 0 */
+ }
+
+ /* Compare the version */
+ if (version > TDBSAM_VERSION) {
+ /* Version more recent than the latest known */
+ DEBUG(0, ("tdbsam_open: unknown version => %d\n", version));
+ TALLOC_FREE(db_sam);
+ TALLOC_FREE(mtx);
+ return false;
+ }
+
+ if ( version < TDBSAM_VERSION ||
+ (version == TDBSAM_VERSION &&
+ minor_version < TDBSAM_MINOR_VERSION) ) {
+ /*
+ * Note that minor versions we read that are greater
+ * than the current minor version we have hard coded
+ * are assumed to be compatible if they have the same
+ * major version. That allows previous versions of the
+ * passdb code that don't know about minor versions to
+ * still use this database. JRA.
+ */
+
+ DEBUG(1, ("tdbsam_open: Converting version %d.%d database to "
+ "version %d.%d.\n",
+ version,
+ minor_version,
+ TDBSAM_VERSION,
+ TDBSAM_MINOR_VERSION));
+
+ if ( !tdbsam_convert(&db_sam, name, version) ) {
+ DEBUG(0, ("tdbsam_open: Error when trying to convert "
+ "tdbsam [%s]\n",name));
+ TALLOC_FREE(db_sam);
+ TALLOC_FREE(mtx);
+ return false;
+ }
+
+ DEBUG(3, ("TDBSAM converted successfully.\n"));
+ }
+ TALLOC_FREE(mtx);
+ }
+
+ DEBUG(4,("tdbsam_open: successfully opened %s\n", name ));
+
+ return true;
+}
+
+/******************************************************************
+ Lookup a name in the SAM TDB
+******************************************************************/
+
+static NTSTATUS tdbsam_getsampwnam (struct pdb_methods *my_methods,
+ struct samu *user, const char *sname)
+{
+ TDB_DATA data;
+ fstring keystr;
+ fstring name;
+ NTSTATUS status;
+
+ if ( !user ) {
+ DEBUG(0,("pdb_getsampwnam: struct samu is NULL.\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* Data is stored in all lower-case */
+ fstrcpy(name, sname);
+ if (!strlower_m(name)) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* set search key */
+ fstr_sprintf(keystr, "%s%s", USERPREFIX, name);
+
+ /* open the database */
+
+ if ( !tdbsam_open( tdbsam_filename ) ) {
+ DEBUG(0,("tdbsam_getsampwnam: failed to open %s!\n", tdbsam_filename));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* get the record */
+
+ status = dbwrap_fetch_bystring(db_sam, talloc_tos(), keystr, &data);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5,("pdb_getsampwnam (TDB): error fetching database.\n"));
+ DEBUGADD(5, (" Key: %s\n", keystr));
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ if (data.dsize == 0) {
+ DEBUG(5, ("%s: Got 0-sized record for key %s\n", __func__,
+ keystr));
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ /* unpack the buffer */
+
+ if (!init_samu_from_buffer(user, SAMU_BUFFER_LATEST, data.dptr, data.dsize)) {
+ DBG_ERR("Bad struct samu entry returned from TDB!\n");
+ TALLOC_FREE(data.dptr);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* success */
+
+ TALLOC_FREE(data.dptr);
+
+ return NT_STATUS_OK;
+}
+
+/***************************************************************************
+ Search by rid
+ **************************************************************************/
+
+static NTSTATUS tdbsam_getsampwrid (struct pdb_methods *my_methods,
+ struct samu *user, uint32_t rid)
+{
+ NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+ TDB_DATA data;
+ fstring keystr;
+ fstring name;
+
+ if ( !user ) {
+ DEBUG(0,("pdb_getsampwrid: struct samu is NULL.\n"));
+ return nt_status;
+ }
+
+ /* set search key */
+
+ fstr_sprintf(keystr, "%s%.8x", RIDPREFIX, rid);
+
+ /* open the database */
+
+ if ( !tdbsam_open( tdbsam_filename ) ) {
+ DEBUG(0,("tdbsam_getsampwrid: failed to open %s!\n", tdbsam_filename));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* get the record */
+
+ nt_status = dbwrap_fetch_bystring(db_sam, talloc_tos(), keystr, &data);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(5,("pdb_getsampwrid (TDB): error looking up RID %d by key %s.\n", rid, keystr));
+ return nt_status;
+ }
+
+ fstrcpy(name, (const char *)data.dptr);
+ TALLOC_FREE(data.dptr);
+
+ return tdbsam_getsampwnam (my_methods, user, name);
+}
+
+static NTSTATUS tdbsam_getsampwsid(struct pdb_methods *my_methods,
+ struct samu * user, const struct dom_sid *sid)
+{
+ uint32_t rid;
+
+ if ( !sid_peek_check_rid(get_global_sam_sid(), sid, &rid) )
+ return NT_STATUS_UNSUCCESSFUL;
+
+ return tdbsam_getsampwrid(my_methods, user, rid);
+}
+
+static bool tdb_delete_samacct_only( struct samu *sam_pass )
+{
+ fstring keystr;
+ fstring name;
+ NTSTATUS status;
+
+ fstrcpy(name, pdb_get_username(sam_pass));
+ if (!strlower_m(name)) {
+ return false;
+ }
+
+ /* set the search key */
+
+ fstr_sprintf(keystr, "%s%s", USERPREFIX, name);
+
+ /* it's outaa here! 8^) */
+ if ( !tdbsam_open( tdbsam_filename ) ) {
+ DEBUG(0,("tdb_delete_samacct_only: failed to open %s!\n",
+ tdbsam_filename));
+ return false;
+ }
+
+ status = dbwrap_delete_bystring(db_sam, keystr);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("Error deleting entry from tdb passwd "
+ "database: %s!\n", nt_errstr(status)));
+ return false;
+ }
+
+ return true;
+}
+
+/***************************************************************************
+ Delete a struct samu records for the username and RID key
+****************************************************************************/
+
+static NTSTATUS tdbsam_delete_sam_account(struct pdb_methods *my_methods,
+ struct samu *sam_pass)
+{
+ NTSTATUS nt_status;
+ fstring keystr;
+ uint32_t rid;
+ fstring name;
+
+ /* open the database */
+
+ if ( !tdbsam_open( tdbsam_filename ) ) {
+ DEBUG(0,("tdbsam_delete_sam_account: failed to open %s!\n",
+ tdbsam_filename));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ fstrcpy(name, pdb_get_username(sam_pass));
+ if (!strlower_m(name)) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* set the search key */
+
+ fstr_sprintf(keystr, "%s%s", USERPREFIX, name);
+
+ rid = pdb_get_user_rid(sam_pass);
+
+ /* it's outaa here! 8^) */
+
+ if (dbwrap_transaction_start(db_sam) != 0) {
+ DEBUG(0, ("Could not start transaction\n"));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ nt_status = dbwrap_delete_bystring(db_sam, keystr);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(5, ("Error deleting entry from tdb passwd "
+ "database: %s!\n", nt_errstr(nt_status)));
+ goto cancel;
+ }
+
+ /* set the search key */
+
+ fstr_sprintf(keystr, "%s%.8x", RIDPREFIX, rid);
+
+ /* it's outaa here! 8^) */
+
+ nt_status = dbwrap_delete_bystring(db_sam, keystr);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(5, ("Error deleting entry from tdb rid "
+ "database: %s!\n", nt_errstr(nt_status)));
+ goto cancel;
+ }
+
+ if (dbwrap_transaction_commit(db_sam) != 0) {
+ DEBUG(0, ("Could not commit transaction\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ return NT_STATUS_OK;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db_sam) != 0) {
+ smb_panic("transaction_cancel failed");
+ }
+
+ return nt_status;
+}
+
+
+/***************************************************************************
+ Update the TDB SAM account record only
+ Assumes that the tdbsam is already open
+****************************************************************************/
+static bool tdb_update_samacct_only( struct samu* newpwd, int flag )
+{
+ TDB_DATA data;
+ uint8_t *buf = NULL;
+ fstring keystr;
+ fstring name;
+ bool ret = false;
+ NTSTATUS status;
+
+ /* copy the struct samu struct into a BYTE buffer for storage */
+
+ if ( (data.dsize=init_buffer_from_samu(&buf, newpwd, False)) == -1 ) {
+ DEBUG(0,("tdb_update_sam: ERROR - Unable to copy struct samu info BYTE buffer!\n"));
+ goto done;
+ }
+ data.dptr = buf;
+
+ fstrcpy(name, pdb_get_username(newpwd));
+ if (!strlower_m(name)) {
+ goto done;
+ }
+
+ DEBUG(5, ("Storing %saccount %s with RID %d\n",
+ flag == TDB_INSERT ? "(new) " : "", name,
+ pdb_get_user_rid(newpwd)));
+
+ /* setup the USER index key */
+ fstr_sprintf(keystr, "%s%s", USERPREFIX, name);
+
+ /* add the account */
+
+ status = dbwrap_store_bystring(db_sam, keystr, data, flag);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Unable to modify passwd TDB: %s!\n",
+ nt_errstr(status)));
+ goto done;
+ }
+
+ ret = true;
+
+done:
+ /* cleanup */
+ SAFE_FREE(buf);
+ return ret;
+}
+
+/***************************************************************************
+ Update the TDB SAM RID record only
+ Assumes that the tdbsam is already open
+****************************************************************************/
+static bool tdb_update_ridrec_only( struct samu* newpwd, int flag )
+{
+ TDB_DATA data;
+ fstring keystr;
+ fstring name;
+ NTSTATUS status;
+
+ fstrcpy(name, pdb_get_username(newpwd));
+ if (!strlower_m(name)) {
+ return false;
+ }
+
+ /* setup RID data */
+ data = string_term_tdb_data(name);
+
+ /* setup the RID index key */
+ fstr_sprintf(keystr, "%s%.8x", RIDPREFIX, pdb_get_user_rid(newpwd));
+
+ /* add the reference */
+ status = dbwrap_store_bystring(db_sam, keystr, data, flag);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Unable to modify TDB passwd: %s!\n",
+ nt_errstr(status)));
+ return false;
+ }
+
+ return true;
+
+}
+
+/***************************************************************************
+ Update the TDB SAM
+****************************************************************************/
+
+static bool tdb_update_sam(struct pdb_methods *my_methods, struct samu* newpwd,
+ int flag)
+{
+ uint32_t oldrid;
+ uint32_t newrid;
+
+ if (!(newrid = pdb_get_user_rid(newpwd))) {
+ DEBUG(0,("tdb_update_sam: struct samu (%s) with no RID!\n",
+ pdb_get_username(newpwd)));
+ return False;
+ }
+
+ oldrid = newrid;
+
+ /* open the database */
+
+ if ( !tdbsam_open( tdbsam_filename ) ) {
+ DEBUG(0,("tdbsam_getsampwnam: failed to open %s!\n", tdbsam_filename));
+ return False;
+ }
+
+ if (dbwrap_transaction_start(db_sam) != 0) {
+ DEBUG(0, ("Could not start transaction\n"));
+ return false;
+ }
+
+ /* If we are updating, we may be changing this users RID. Retrieve the old RID
+ so we can check. */
+
+ if (flag == TDB_MODIFY) {
+ struct samu *account = samu_new(talloc_tos());
+ if (account == NULL) {
+ DEBUG(0,("tdb_update_sam: samu_new() failed\n"));
+ goto cancel;
+ }
+ if (!NT_STATUS_IS_OK(tdbsam_getsampwnam(my_methods, account, pdb_get_username(newpwd)))) {
+ DEBUG(0,("tdb_update_sam: tdbsam_getsampwnam() for %s failed\n",
+ pdb_get_username(newpwd)));
+ TALLOC_FREE(account);
+ goto cancel;
+ }
+ if (!(oldrid = pdb_get_user_rid(account))) {
+ DEBUG(0,("tdb_update_sam: pdb_get_user_rid() failed\n"));
+ TALLOC_FREE(account);
+ goto cancel;
+ }
+ TALLOC_FREE(account);
+ }
+
+ /* Update the new samu entry. */
+ if (!tdb_update_samacct_only(newpwd, flag)) {
+ goto cancel;
+ }
+
+ /* Now take care of the case where the RID changed. We need
+ * to delete the old RID key and add the new. */
+
+ if (flag == TDB_MODIFY && newrid != oldrid) {
+ fstring keystr;
+
+ /* Delete old RID key */
+ DEBUG(10, ("tdb_update_sam: Deleting key for RID %u\n", oldrid));
+ fstr_sprintf(keystr, "%s%.8x", RIDPREFIX, oldrid);
+ if (!NT_STATUS_IS_OK(dbwrap_delete_bystring(db_sam, keystr))) {
+ DEBUG(0, ("tdb_update_sam: Can't delete %s\n", keystr));
+ goto cancel;
+ }
+ /* Insert new RID key */
+ DEBUG(10, ("tdb_update_sam: Inserting key for RID %u\n", newrid));
+ if (!tdb_update_ridrec_only(newpwd, TDB_INSERT)) {
+ goto cancel;
+ }
+ } else {
+ DEBUG(10, ("tdb_update_sam: %s key for RID %u\n",
+ flag == TDB_MODIFY ? "Updating" : "Inserting", newrid));
+ if (!tdb_update_ridrec_only(newpwd, flag)) {
+ goto cancel;
+ }
+ }
+
+ if (dbwrap_transaction_commit(db_sam) != 0) {
+ DEBUG(0, ("Could not commit transaction\n"));
+ return false;
+ }
+
+ return true;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db_sam) != 0) {
+ smb_panic("transaction_cancel failed");
+ }
+ return false;
+}
+
+/***************************************************************************
+ Modifies an existing struct samu
+****************************************************************************/
+
+static NTSTATUS tdbsam_update_sam_account (struct pdb_methods *my_methods, struct samu *newpwd)
+{
+ if ( !tdb_update_sam(my_methods, newpwd, TDB_MODIFY) )
+ return NT_STATUS_UNSUCCESSFUL;
+
+ return NT_STATUS_OK;
+}
+
+/***************************************************************************
+ Adds an existing struct samu
+****************************************************************************/
+
+static NTSTATUS tdbsam_add_sam_account (struct pdb_methods *my_methods, struct samu *newpwd)
+{
+ if ( !tdb_update_sam(my_methods, newpwd, TDB_INSERT) )
+ return NT_STATUS_UNSUCCESSFUL;
+
+ return NT_STATUS_OK;
+}
+
+/***************************************************************************
+ Renames a struct samu
+ - check for the posix user/rename user script
+ - Add and lock the new user record
+ - rename the posix user
+ - rewrite the rid->username record
+ - delete the old user
+ - unlock the new user record
+***************************************************************************/
+static NTSTATUS tdbsam_rename_sam_account(struct pdb_methods *my_methods,
+ struct samu *old_acct,
+ const char *newname)
+{
+ const struct loadparm_substitution *lp_sub =
+ loadparm_s3_global_substitution();
+ struct samu *new_acct = NULL;
+ char *rename_script = NULL;
+ int rename_ret;
+ fstring oldname_lower;
+ fstring newname_lower;
+
+ /* can't do anything without an external script */
+
+ if ( !(new_acct = samu_new( talloc_tos() )) ) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ rename_script = lp_rename_user_script(new_acct, lp_sub);
+ if (!rename_script) {
+ TALLOC_FREE(new_acct);
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (!*rename_script) {
+ TALLOC_FREE(new_acct);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if ( !pdb_copy_sam_account(new_acct, old_acct)
+ || !pdb_set_username(new_acct, newname, PDB_CHANGED))
+ {
+ TALLOC_FREE(new_acct);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* open the database */
+ if ( !tdbsam_open( tdbsam_filename ) ) {
+ DEBUG(0, ("tdbsam_getsampwnam: failed to open %s!\n",
+ tdbsam_filename));
+ TALLOC_FREE(new_acct);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (dbwrap_transaction_start(db_sam) != 0) {
+ DEBUG(0, ("Could not start transaction\n"));
+ TALLOC_FREE(new_acct);
+ return NT_STATUS_ACCESS_DENIED;
+
+ }
+
+ /* add the new account and lock it */
+ if ( !tdb_update_samacct_only(new_acct, TDB_INSERT) ) {
+ goto cancel;
+ }
+
+ /* Rename the posix user. Follow the semantics of _samr_create_user()
+ so that we lower case the posix name but preserve the case in passdb */
+
+ fstrcpy( oldname_lower, pdb_get_username(old_acct) );
+ if (!strlower_m( oldname_lower )) {
+ goto cancel;
+ }
+
+ fstrcpy( newname_lower, newname );
+ if (!strlower_m( newname_lower )) {
+ goto cancel;
+ }
+
+ rename_script = talloc_string_sub2(new_acct,
+ rename_script,
+ "%unew",
+ newname_lower,
+ true,
+ false,
+ true);
+ if (!rename_script) {
+ goto cancel;
+ }
+ rename_script = talloc_string_sub2(new_acct,
+ rename_script,
+ "%uold",
+ oldname_lower,
+ true,
+ false,
+ true);
+ if (!rename_script) {
+ goto cancel;
+ }
+ rename_ret = smbrun(rename_script, NULL, NULL);
+
+ DEBUG(rename_ret ? 0 : 3,("Running the command `%s' gave %d\n",
+ rename_script, rename_ret));
+
+ if (rename_ret != 0) {
+ goto cancel;
+ }
+
+ smb_nscd_flush_user_cache();
+
+ /* rewrite the rid->username record */
+
+ if ( !tdb_update_ridrec_only( new_acct, TDB_MODIFY) ) {
+ goto cancel;
+ }
+
+ tdb_delete_samacct_only( old_acct );
+
+ if (dbwrap_transaction_commit(db_sam) != 0) {
+ /*
+ * Ok, we're screwed. We've changed the posix account, but
+ * could not adapt passdb.tdb. Shall we change the posix
+ * account back?
+ */
+ DEBUG(0, ("transaction_commit failed\n"));
+ TALLOC_FREE(new_acct);
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ TALLOC_FREE(new_acct );
+ return NT_STATUS_OK;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db_sam) != 0) {
+ smb_panic("transaction_cancel failed");
+ }
+
+ TALLOC_FREE(new_acct);
+
+ return NT_STATUS_ACCESS_DENIED;
+}
+
+static uint32_t tdbsam_capabilities(struct pdb_methods *methods)
+{
+ return PDB_CAP_STORE_RIDS;
+}
+
+static bool tdbsam_new_rid(struct pdb_methods *methods, uint32_t *prid)
+{
+ uint32_t rid;
+ NTSTATUS status;
+
+ rid = BASE_RID; /* Default if not set */
+
+ if (!tdbsam_open(tdbsam_filename)) {
+ DEBUG(0,("tdbsam_new_rid: failed to open %s!\n",
+ tdbsam_filename));
+ return false;
+ }
+
+ status = dbwrap_trans_change_uint32_atomic_bystring(
+ db_sam, NEXT_RID_STRING, &rid, 1);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(3, ("tdbsam_new_rid: Failed to increase %s: %s\n",
+ NEXT_RID_STRING, nt_errstr(status)));
+ return false;
+ }
+
+ *prid = rid;
+
+ return true;
+}
+
+struct tdbsam_search_state {
+ struct pdb_methods *methods;
+ uint32_t acct_flags;
+
+ uint32_t *rids;
+ uint32_t num_rids;
+ ssize_t array_size;
+ uint32_t current;
+};
+
+static int tdbsam_collect_rids(struct db_record *rec, void *private_data)
+{
+ struct tdbsam_search_state *state = talloc_get_type_abort(
+ private_data, struct tdbsam_search_state);
+ size_t prefixlen = strlen(RIDPREFIX);
+ uint32_t rid;
+ int error = 0;
+ TDB_DATA key;
+
+ key = dbwrap_record_get_key(rec);
+
+ if ((key.dsize < prefixlen)
+ || (strncmp((char *)key.dptr, RIDPREFIX, prefixlen))) {
+ return 0;
+ }
+
+ rid = smb_strtoul((char *)key.dptr+prefixlen,
+ NULL,
+ 16,
+ &error,
+ SMB_STR_STANDARD);
+ if (error != 0) {
+ return 0;
+ }
+
+ ADD_TO_LARGE_ARRAY(state, uint32_t, rid, &state->rids, &state->num_rids,
+ &state->array_size);
+
+ return 0;
+}
+
+static void tdbsam_search_end(struct pdb_search *search)
+{
+ struct tdbsam_search_state *state = talloc_get_type_abort(
+ search->private_data, struct tdbsam_search_state);
+ TALLOC_FREE(state);
+}
+
+static bool tdbsam_search_next_entry(struct pdb_search *search,
+ struct samr_displayentry *entry)
+{
+ struct tdbsam_search_state *state = talloc_get_type_abort(
+ search->private_data, struct tdbsam_search_state);
+ struct samu *user = NULL;
+ NTSTATUS status;
+ uint32_t rid;
+
+ again:
+ TALLOC_FREE(user);
+ user = samu_new(talloc_tos());
+ if (user == NULL) {
+ DEBUG(0, ("samu_new failed\n"));
+ return false;
+ }
+
+ if (state->current == state->num_rids) {
+ TALLOC_FREE(user);
+ return false;
+ }
+
+ rid = state->rids[state->current++];
+
+ status = tdbsam_getsampwrid(state->methods, user, rid);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
+ /*
+ * Someone has deleted that user since we listed the RIDs
+ */
+ goto again;
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("tdbsam_getsampwrid failed: %s\n",
+ nt_errstr(status)));
+ TALLOC_FREE(user);
+ return false;
+ }
+
+ if ((state->acct_flags != 0) &&
+ ((state->acct_flags & pdb_get_acct_ctrl(user)) == 0)) {
+ goto again;
+ }
+
+ entry->acct_flags = pdb_get_acct_ctrl(user);
+ entry->rid = rid;
+ entry->account_name = talloc_strdup(search, pdb_get_username(user));
+ entry->fullname = talloc_strdup(search, pdb_get_fullname(user));
+ entry->description = talloc_strdup(search, pdb_get_acct_desc(user));
+
+ TALLOC_FREE(user);
+
+ if ((entry->account_name == NULL) || (entry->fullname == NULL)
+ || (entry->description == NULL)) {
+ DEBUG(0, ("talloc_strdup failed\n"));
+ return false;
+ }
+
+ return true;
+}
+
+static bool tdbsam_search_users(struct pdb_methods *methods,
+ struct pdb_search *search,
+ uint32_t acct_flags)
+{
+ struct tdbsam_search_state *state;
+
+ if (!tdbsam_open(tdbsam_filename)) {
+ DEBUG(0,("tdbsam_getsampwnam: failed to open %s!\n",
+ tdbsam_filename));
+ return false;
+ }
+
+ state = talloc_zero(search, struct tdbsam_search_state);
+ if (state == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ return false;
+ }
+ state->acct_flags = acct_flags;
+ state->methods = methods;
+
+ dbwrap_traverse_read(db_sam, tdbsam_collect_rids, state, NULL);
+
+ search->private_data = state;
+ search->next_entry = tdbsam_search_next_entry;
+ search->search_end = tdbsam_search_end;
+
+ return true;
+}
+
+static bool tdbsam_is_responsible_for_builtin(struct pdb_methods *m)
+{
+ return map_builtin;
+}
+
+/*********************************************************************
+ Initialize the tdb sam backend. Setup the dispatch table of methods,
+ open the tdb, etc...
+*********************************************************************/
+
+static NTSTATUS pdb_init_tdbsam(struct pdb_methods **pdb_method, const char *location)
+{
+ NTSTATUS nt_status;
+ char *tdbfile = NULL;
+ const char *pfile = location;
+
+ if (!NT_STATUS_IS_OK(nt_status = make_pdb_method( pdb_method ))) {
+ return nt_status;
+ }
+
+ (*pdb_method)->name = "tdbsam";
+
+ (*pdb_method)->getsampwnam = tdbsam_getsampwnam;
+ (*pdb_method)->getsampwsid = tdbsam_getsampwsid;
+ (*pdb_method)->add_sam_account = tdbsam_add_sam_account;
+ (*pdb_method)->update_sam_account = tdbsam_update_sam_account;
+ (*pdb_method)->delete_sam_account = tdbsam_delete_sam_account;
+ (*pdb_method)->rename_sam_account = tdbsam_rename_sam_account;
+ (*pdb_method)->search_users = tdbsam_search_users;
+
+ (*pdb_method)->capabilities = tdbsam_capabilities;
+ (*pdb_method)->new_rid = tdbsam_new_rid;
+
+ (*pdb_method)->is_responsible_for_builtin =
+ tdbsam_is_responsible_for_builtin;
+ map_builtin = lp_parm_bool(-1, "tdbsam", "map builtin", true);
+
+ /* save the path for later */
+
+ if (!location) {
+ if (asprintf(&tdbfile, "%s/%s", lp_private_dir(),
+ PASSDB_FILE_NAME) < 0) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ pfile = tdbfile;
+ }
+
+ /* Do not leak memory if the init function is called more than once */
+ SAFE_FREE(tdbsam_filename);
+ tdbsam_filename = SMB_STRDUP(pfile);
+ if (!tdbsam_filename) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ SAFE_FREE(tdbfile);
+
+ /* no private data */
+
+ (*pdb_method)->private_data = NULL;
+ (*pdb_method)->free_private_data = NULL;
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS pdb_tdbsam_init(TALLOC_CTX *ctx)
+{
+ return smb_register_passdb(PASSDB_INTERFACE_VERSION, "tdbsam", pdb_init_tdbsam);
+}