summaryrefslogtreecommitdiffstats
path: root/source3/groupdb/mapping_tdb.c
diff options
context:
space:
mode:
Diffstat (limited to 'source3/groupdb/mapping_tdb.c')
-rw-r--r--source3/groupdb/mapping_tdb.c1135
1 files changed, 1135 insertions, 0 deletions
diff --git a/source3/groupdb/mapping_tdb.c b/source3/groupdb/mapping_tdb.c
new file mode 100644
index 0000000..a39b03d
--- /dev/null
+++ b/source3/groupdb/mapping_tdb.c
@@ -0,0 +1,1135 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * RPC Pipe client / server routines
+ * Copyright (C) Andrew Tridgell 1992-2006,
+ * Copyright (C) Jean François Micouleau 1998-2001.
+ * Copyright (C) Volker Lendecke 2006.
+ * Copyright (C) Gerald Carter 2006.
+ *
+ * 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 "groupdb/mapping.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "util_tdb.h"
+#include "../libcli/security/security.h"
+#include "groupdb/mapping_tdb.h"
+#include "lib/util/smb_strtox.h"
+
+static struct db_context *db; /* used for driver files */
+
+static bool enum_group_mapping(const struct dom_sid *domsid,
+ enum lsa_SidType sid_name_use,
+ GROUP_MAP ***pp_rmap,
+ size_t *p_num_entries,
+ bool unix_only);
+static bool group_map_remove(const struct dom_sid *sid);
+
+static bool mapping_switch(const char *ldb_path);
+
+/****************************************************************************
+ Open the group mapping tdb.
+****************************************************************************/
+static bool init_group_mapping(void)
+{
+ char *tdb_path;
+ char *ldb_path;
+
+ if (db != NULL) {
+ return true;
+ }
+
+ tdb_path = state_path(talloc_tos(), "group_mapping.tdb");
+ if (tdb_path == NULL) {
+ return false;
+ }
+ db = db_open(NULL, tdb_path, 0,
+ TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
+ DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+ if (db == NULL) {
+ DEBUG(0, ("Failed to open group mapping database: %s\n",
+ strerror(errno)));
+ talloc_free(tdb_path);
+ return false;
+ }
+
+ ldb_path = state_path(talloc_tos(), "group_mapping.ldb");
+ if (ldb_path == NULL) {
+ talloc_free(tdb_path);
+ return false;
+ }
+ if (file_exist(ldb_path) && !mapping_switch(ldb_path)) {
+ unlink(tdb_path);
+ talloc_free(tdb_path);
+ talloc_free(ldb_path);
+ return false;
+
+ } else {
+ /* handle upgrade from old versions of the database */
+#if 0 /* -- Needs conversion to dbwrap -- */
+ const char *vstring = "INFO/version";
+ int32 vers_id;
+ GROUP_MAP *map_table = NULL;
+ size_t num_entries = 0;
+
+ /* handle a Samba upgrade */
+ tdb_lock_bystring(tdb, vstring);
+
+ /* Cope with byte-reversed older versions of the db. */
+ vers_id = tdb_fetch_int32(tdb, vstring);
+ if ((vers_id == DATABASE_VERSION_V1)
+ || (IREV(vers_id) == DATABASE_VERSION_V1)) {
+ /*
+ * Written on a bigendian machine with old fetch_int
+ * code. Save as le.
+ */
+ tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
+ vers_id = DATABASE_VERSION_V2;
+ }
+
+ /* if its an unknown version we remove everything in the db */
+
+ if (vers_id != DATABASE_VERSION_V2) {
+ tdb_wipe_all(tdb);
+ tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
+ }
+
+ tdb_unlock_bystring(tdb, vstring);
+
+ /* cleanup any map entries with a gid == -1 */
+
+ if ( enum_group_mapping( NULL, SID_NAME_UNKNOWN, &map_table,
+ &num_entries, False ) ) {
+ int i;
+
+ for ( i=0; i<num_entries; i++ ) {
+ if ( map_table[i].gid == -1 ) {
+ group_map_remove( &map_table[i].sid );
+ }
+ }
+
+ SAFE_FREE( map_table );
+ }
+#endif
+ }
+ talloc_free(tdb_path);
+ talloc_free(ldb_path);
+ return true;
+}
+
+static char *group_mapping_key(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
+{
+ struct dom_sid_buf sidstr;
+
+ return talloc_asprintf(
+ mem_ctx, "%s%s", GROUP_PREFIX, dom_sid_str_buf(sid, &sidstr));
+}
+
+/****************************************************************************
+****************************************************************************/
+static bool add_mapping_entry(GROUP_MAP *map, int flag)
+{
+ char *key, *buf;
+ int len;
+ NTSTATUS status;
+
+ key = group_mapping_key(talloc_tos(), &map->sid);
+ if (key == NULL) {
+ return false;
+ }
+
+ len = tdb_pack(NULL, 0, "ddff",
+ map->gid, map->sid_name_use, map->nt_name, map->comment);
+
+ buf = talloc_array(key, char, len);
+ if (!buf) {
+ TALLOC_FREE(key);
+ return false;
+ }
+ len = tdb_pack((uint8_t *)buf, len, "ddff", map->gid,
+ map->sid_name_use, map->nt_name, map->comment);
+
+ status = dbwrap_trans_store(
+ db, string_term_tdb_data(key),
+ make_tdb_data((uint8_t *)buf, len), TDB_REPLACE);
+
+ TALLOC_FREE(key);
+
+ return NT_STATUS_IS_OK(status);
+}
+
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+static bool get_group_map_from_sid(struct dom_sid sid, GROUP_MAP *map)
+{
+ TDB_DATA dbuf;
+ char *key;
+ int ret = 0;
+ NTSTATUS status;
+ fstring nt_name;
+ fstring comment;
+
+ /* the key is the SID, retrieving is direct */
+
+ key = group_mapping_key(talloc_tos(), &sid);
+ if (key == NULL) {
+ return false;
+ }
+
+ status = dbwrap_fetch_bystring(db, key, key, &dbuf);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(key);
+ return false;
+ }
+
+ ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
+ &map->gid, &map->sid_name_use,
+ &nt_name, &comment);
+
+ TALLOC_FREE(key);
+
+ if ( ret == -1 ) {
+ DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
+ return false;
+ }
+
+ sid_copy(&map->sid, &sid);
+
+ map->nt_name = talloc_strdup(map, nt_name);
+ if (!map->nt_name) {
+ return false;
+ }
+ map->comment = talloc_strdup(map, comment);
+ if (!map->comment) {
+ return false;
+ }
+
+ return true;
+}
+
+static bool dbrec2map(const struct db_record *rec, GROUP_MAP *map)
+{
+ TDB_DATA key = dbwrap_record_get_key(rec);
+ TDB_DATA value = dbwrap_record_get_value(rec);
+ int ret = 0;
+ fstring nt_name;
+ fstring comment;
+
+ if ((key.dsize < strlen(GROUP_PREFIX))
+ || (strncmp((char *)key.dptr, GROUP_PREFIX,
+ GROUP_PREFIX_LEN) != 0)) {
+ return False;
+ }
+
+ if (!string_to_sid(&map->sid, (const char *)key.dptr
+ + GROUP_PREFIX_LEN)) {
+ return False;
+ }
+
+ ret = tdb_unpack(value.dptr, value.dsize, "ddff",
+ &map->gid, &map->sid_name_use,
+ &nt_name, &comment);
+
+ if (ret == -1) {
+ DEBUG(3, ("dbrec2map: tdb_unpack failure\n"));
+ return false;
+ }
+
+ map->nt_name = talloc_strdup(map, nt_name);
+ if (!map->nt_name) {
+ return false;
+ }
+ map->comment = talloc_strdup(map, comment);
+ if (!map->comment) {
+ return false;
+ }
+
+ return true;
+}
+
+struct find_map_state {
+ bool found;
+ const char *name; /* If != NULL, look for name */
+ gid_t gid; /* valid iff name == NULL */
+ GROUP_MAP *map;
+};
+
+static int find_map(struct db_record *rec, void *private_data)
+{
+ struct find_map_state *state = (struct find_map_state *)private_data;
+
+ if (!dbrec2map(rec, state->map)) {
+ DEBUG(10, ("failed to unpack map\n"));
+ return 0;
+ }
+
+ if (state->name != NULL) {
+ if (strequal(state->name, state->map->nt_name)) {
+ state->found = true;
+ return 1;
+ }
+ }
+ else {
+ if (state->map->gid == state->gid) {
+ state->found = true;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
+{
+ struct find_map_state state;
+
+ state.found = false;
+ state.name = NULL; /* Indicate we're looking for gid */
+ state.gid = gid;
+ state.map = map;
+
+ dbwrap_traverse_read(db, find_map, (void *)&state, NULL);
+
+ return state.found;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map)
+{
+ struct find_map_state state;
+
+ state.found = false;
+ state.name = name;
+ state.map = map;
+
+ dbwrap_traverse_read(db, find_map, (void *)&state, NULL);
+
+ return state.found;
+}
+
+/****************************************************************************
+ Remove a group mapping entry.
+****************************************************************************/
+
+static bool group_map_remove(const struct dom_sid *sid)
+{
+ char *key;
+ NTSTATUS status;
+
+ key = group_mapping_key(talloc_tos(), sid);
+ if (key == NULL) {
+ return false;
+ }
+
+ status = dbwrap_trans_delete(db, string_term_tdb_data(key));
+
+ TALLOC_FREE(key);
+ return NT_STATUS_IS_OK(status);
+}
+
+/****************************************************************************
+ Enumerate the group mapping.
+****************************************************************************/
+
+struct enum_map_state {
+ const struct dom_sid *domsid;
+ enum lsa_SidType sid_name_use;
+ bool unix_only;
+
+ size_t num_maps;
+ GROUP_MAP **maps;
+};
+
+static int collect_map(struct db_record *rec, void *private_data)
+{
+ struct enum_map_state *state = (struct enum_map_state *)private_data;
+ GROUP_MAP *map;
+ GROUP_MAP **tmp;
+
+ map = talloc_zero(NULL, GROUP_MAP);
+ if (!map) {
+ DEBUG(0, ("Unable to allocate group map!\n"));
+ return 1;
+ }
+
+ if (!dbrec2map(rec, map)) {
+ TALLOC_FREE(map);
+ return 0;
+ }
+ /* list only the type or everything if UNKNOWN */
+ if (state->sid_name_use != SID_NAME_UNKNOWN
+ && state->sid_name_use != map->sid_name_use) {
+ DEBUG(11,("enum_group_mapping: group %s is not of the "
+ "requested type\n", map->nt_name));
+ TALLOC_FREE(map);
+ return 0;
+ }
+
+ if ((state->unix_only == ENUM_ONLY_MAPPED) && (map->gid == -1)) {
+ DEBUG(11,("enum_group_mapping: group %s is non mapped\n",
+ map->nt_name));
+ TALLOC_FREE(map);
+ return 0;
+ }
+
+ if ((state->domsid != NULL) &&
+ (dom_sid_compare_domain(state->domsid, &map->sid) != 0)) {
+ struct dom_sid_buf buf;
+ DEBUG(11,("enum_group_mapping: group %s is not in domain\n",
+ dom_sid_str_buf(&map->sid, &buf)));
+ TALLOC_FREE(map);
+ return 0;
+ }
+
+ tmp = talloc_realloc(NULL, state->maps, GROUP_MAP *,
+ state->num_maps + 1);
+ if (!tmp) {
+ DEBUG(0,("enum_group_mapping: Unable to enlarge group "
+ "map!\n"));
+ TALLOC_FREE(map);
+ return 1;
+ }
+
+ state->maps = tmp;
+ state->maps[state->num_maps] = talloc_move(state->maps, &map);
+ state->num_maps++;
+ return 0;
+}
+
+static bool enum_group_mapping(const struct dom_sid *domsid,
+ enum lsa_SidType sid_name_use,
+ GROUP_MAP ***pp_rmap,
+ size_t *p_num_entries, bool unix_only)
+{
+ struct enum_map_state state;
+ NTSTATUS status;
+
+ state.domsid = domsid;
+ state.sid_name_use = sid_name_use;
+ state.unix_only = unix_only;
+ state.num_maps = 0;
+ state.maps = NULL;
+
+ status = dbwrap_traverse_read(db, collect_map, (void *)&state, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(state.maps);
+ return false;
+ }
+
+ *pp_rmap = state.maps;
+ *p_num_entries = state.num_maps;
+
+ return true;
+}
+
+/* This operation happens on session setup, so it should better be fast. We
+ * store a list of aliases a SID is member of hanging off MEMBEROF/SID. */
+
+static NTSTATUS one_alias_membership(const struct dom_sid *member,
+ struct dom_sid **sids, size_t *num)
+{
+ struct dom_sid_buf tmp;
+ fstring key;
+ char *string_sid;
+ TDB_DATA dbuf;
+ const char *p;
+ NTSTATUS status;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX,
+ dom_sid_str_buf(member, &tmp));
+
+ status = dbwrap_fetch_bystring(db, frame, key, &dbuf);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_OK;
+ }
+
+ p = (const char *)dbuf.dptr;
+
+ while (next_token_talloc(frame, &p, &string_sid, " ")) {
+ struct dom_sid alias;
+ uint32_t num_sids;
+
+ if (!string_to_sid(&alias, string_sid))
+ continue;
+
+ num_sids = *num;
+ status= add_sid_to_array_unique(NULL, &alias, sids, &num_sids);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+ *num = num_sids;
+ }
+
+done:
+ TALLOC_FREE(frame);
+ return status;
+}
+
+static NTSTATUS alias_memberships(const struct dom_sid *members, size_t num_members,
+ struct dom_sid **sids, size_t *num)
+{
+ size_t i;
+
+ *num = 0;
+ *sids = NULL;
+
+ for (i=0; i<num_members; i++) {
+ NTSTATUS status = one_alias_membership(&members[i], sids, num);
+ if (!NT_STATUS_IS_OK(status))
+ return status;
+ }
+ return NT_STATUS_OK;
+}
+
+static bool is_aliasmem(const struct dom_sid *alias, const struct dom_sid *member)
+{
+ struct dom_sid *sids;
+ size_t i;
+ size_t num;
+
+ /* This feels the wrong way round, but the on-disk data structure
+ * dictates it this way. */
+ if (!NT_STATUS_IS_OK(alias_memberships(member, 1, &sids, &num)))
+ return False;
+
+ for (i=0; i<num; i++) {
+ if (dom_sid_compare(alias, &sids[i]) == 0) {
+ TALLOC_FREE(sids);
+ return True;
+ }
+ }
+ TALLOC_FREE(sids);
+ return False;
+}
+
+
+static NTSTATUS add_aliasmem(const struct dom_sid *alias, const struct dom_sid *member)
+{
+ GROUP_MAP *map;
+ char *key;
+ struct dom_sid_buf string_sid;
+ char *new_memberstring;
+ struct db_record *rec;
+ NTSTATUS status;
+ TDB_DATA value;
+
+ map = talloc_zero(talloc_tos(), GROUP_MAP);
+ if (!map) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (!get_group_map_from_sid(*alias, map)) {
+ TALLOC_FREE(map);
+ return NT_STATUS_NO_SUCH_ALIAS;
+ }
+
+ if ((map->sid_name_use != SID_NAME_ALIAS) &&
+ (map->sid_name_use != SID_NAME_WKN_GRP)) {
+ TALLOC_FREE(map);
+ return NT_STATUS_NO_SUCH_ALIAS;
+ }
+
+ TALLOC_FREE(map);
+
+ if (is_aliasmem(alias, member))
+ return NT_STATUS_MEMBER_IN_ALIAS;
+
+ key = talloc_asprintf(talloc_tos(), "%s%s", MEMBEROF_PREFIX,
+ dom_sid_str_buf(member, &string_sid));
+ if (key == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (dbwrap_transaction_start(db) != 0) {
+ DEBUG(0, ("transaction_start failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ rec = dbwrap_fetch_locked(db, key, string_term_tdb_data(key));
+
+ if (rec == NULL) {
+ DEBUG(10, ("fetch_lock failed\n"));
+ TALLOC_FREE(key);
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto cancel;
+ }
+
+ value = dbwrap_record_get_value(rec);
+
+ dom_sid_str_buf(alias, &string_sid);
+
+ if (value.dptr != NULL) {
+ new_memberstring = talloc_asprintf(
+ key, "%s %s", (char *)(value.dptr), string_sid.buf);
+ } else {
+ new_memberstring = talloc_strdup(key, string_sid.buf);
+ }
+
+ if (new_memberstring == NULL) {
+ TALLOC_FREE(key);
+ status = NT_STATUS_NO_MEMORY;
+ goto cancel;
+ }
+
+ status = dbwrap_record_store(rec, string_term_tdb_data(new_memberstring), 0);
+
+ TALLOC_FREE(key);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("Could not store record: %s\n", nt_errstr(status)));
+ goto cancel;
+ }
+
+ if (dbwrap_transaction_commit(db) != 0) {
+ DEBUG(0, ("transaction_commit failed\n"));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ return status;
+ }
+
+ return NT_STATUS_OK;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db) != 0) {
+ smb_panic("transaction_cancel failed");
+ }
+
+ return status;
+}
+
+struct aliasmem_state {
+ TALLOC_CTX *mem_ctx;
+ const struct dom_sid *alias;
+ struct dom_sid **sids;
+ size_t *num;
+};
+
+static int collect_aliasmem(struct db_record *rec, void *priv)
+{
+ struct aliasmem_state *state = (struct aliasmem_state *)priv;
+ const char *p;
+ char *alias_string;
+ TALLOC_CTX *frame;
+ TDB_DATA key = dbwrap_record_get_key(rec);
+ TDB_DATA value = dbwrap_record_get_value(rec);
+
+ if (strncmp((const char *)key.dptr, MEMBEROF_PREFIX,
+ MEMBEROF_PREFIX_LEN) != 0)
+ return 0;
+
+ p = (const char *)value.dptr;
+
+ frame = talloc_stackframe();
+
+ while (next_token_talloc(frame, &p, &alias_string, " ")) {
+ struct dom_sid alias, member;
+ const char *member_string;
+ uint32_t num_sids;
+
+ if (!string_to_sid(&alias, alias_string))
+ continue;
+
+ if (dom_sid_compare(state->alias, &alias) != 0)
+ continue;
+
+ /* Ok, we found the alias we're looking for in the membership
+ * list currently scanned. The key represents the alias
+ * member. Add that. */
+
+ member_string = strchr((const char *)key.dptr, '/');
+
+ /* Above we tested for MEMBEROF_PREFIX which includes the
+ * slash. */
+
+ SMB_ASSERT(member_string != NULL);
+ member_string += 1;
+
+ if (!string_to_sid(&member, member_string))
+ continue;
+
+ num_sids = *state->num;
+ if (!NT_STATUS_IS_OK(add_sid_to_array(state->mem_ctx, &member,
+ state->sids,
+ &num_sids)))
+ {
+ /* talloc fail. */
+ break;
+ }
+ *state->num = num_sids;
+ }
+
+ TALLOC_FREE(frame);
+ return 0;
+}
+
+static NTSTATUS enum_aliasmem(const struct dom_sid *alias, TALLOC_CTX *mem_ctx,
+ struct dom_sid **sids, size_t *num)
+{
+ GROUP_MAP *map;
+ struct aliasmem_state state;
+
+ map = talloc_zero(talloc_tos(), GROUP_MAP);
+ if (!map) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (!get_group_map_from_sid(*alias, map)) {
+ TALLOC_FREE(map);
+ return NT_STATUS_NO_SUCH_ALIAS;
+ }
+
+ if ((map->sid_name_use != SID_NAME_ALIAS) &&
+ (map->sid_name_use != SID_NAME_WKN_GRP)) {
+ TALLOC_FREE(map);
+ return NT_STATUS_NO_SUCH_ALIAS;
+ }
+
+ TALLOC_FREE(map);
+
+ *sids = NULL;
+ *num = 0;
+
+ state.alias = alias;
+ state.sids = sids;
+ state.num = num;
+ state.mem_ctx = mem_ctx;
+
+ dbwrap_traverse_read(db, collect_aliasmem, &state, NULL);
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS del_aliasmem(const struct dom_sid *alias, const struct dom_sid *member)
+{
+ NTSTATUS status;
+ struct dom_sid *sids;
+ size_t i, num;
+ bool found = False;
+ char *member_string;
+ char *key;
+ struct dom_sid_buf sid_string;
+
+ if (dbwrap_transaction_start(db) != 0) {
+ DEBUG(0, ("transaction_start failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ status = alias_memberships(member, 1, &sids, &num);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ goto cancel;
+ }
+
+ for (i=0; i<num; i++) {
+ if (dom_sid_compare(&sids[i], alias) == 0) {
+ found = True;
+ break;
+ }
+ }
+
+ if (!found) {
+ TALLOC_FREE(sids);
+ status = NT_STATUS_MEMBER_NOT_IN_ALIAS;
+ goto cancel;
+ }
+
+ if (i < num)
+ sids[i] = sids[num-1];
+
+ num -= 1;
+
+ key = talloc_asprintf(
+ sids,
+ "%s%s",
+ MEMBEROF_PREFIX,
+ dom_sid_str_buf(member, &sid_string));
+ if (key == NULL) {
+ TALLOC_FREE(sids);
+ status = NT_STATUS_NO_MEMORY;
+ goto cancel;
+ }
+
+ if (num == 0) {
+ status = dbwrap_delete_bystring(db, key);
+ goto commit;
+ }
+
+ member_string = talloc_strdup(sids, "");
+ if (member_string == NULL) {
+ TALLOC_FREE(sids);
+ status = NT_STATUS_NO_MEMORY;
+ goto cancel;
+ }
+
+ for (i=0; i<num; i++) {
+
+ member_string = talloc_asprintf_append_buffer(
+ member_string,
+ " %s",
+ dom_sid_str_buf(&sids[i], &sid_string));
+
+ if (member_string == NULL) {
+ TALLOC_FREE(sids);
+ status = NT_STATUS_NO_MEMORY;
+ goto cancel;
+ }
+ }
+
+ status = dbwrap_store_bystring(
+ db, key, string_term_tdb_data(member_string), 0);
+ commit:
+ TALLOC_FREE(sids);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("dbwrap_store_bystring failed: %s\n",
+ nt_errstr(status)));
+ goto cancel;
+ }
+
+ if (dbwrap_transaction_commit(db) != 0) {
+ DEBUG(0, ("transaction_commit failed\n"));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ return status;
+ }
+
+ return NT_STATUS_OK;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db) != 0) {
+ smb_panic("transaction_cancel failed");
+ }
+ return status;
+}
+
+
+/* -- ldb->tdb switching code -------------------------------------------- */
+
+/* change this if the data format ever changes */
+#define LTDB_PACKING_FORMAT 0x26011967
+
+/* old packing formats (not supported for now,
+ * it was never used for group mapping AFAIK) */
+#define LTDB_PACKING_FORMAT_NODN 0x26011966
+
+static unsigned int pull_uint32(uint8_t *p, int ofs)
+{
+ p += ofs;
+ return p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24);
+}
+
+/*
+ unpack a ldb message from a linear buffer in TDB_DATA
+*/
+static int convert_ldb_record(TDB_CONTEXT *ltdb, TDB_DATA key,
+ TDB_DATA data, void *ptr)
+{
+ TALLOC_CTX *tmp_ctx = talloc_tos();
+ GROUP_MAP *map = NULL;
+ uint8_t *p;
+ uint32_t format;
+ uint32_t num_el;
+ unsigned int remaining;
+ unsigned int i, j;
+ size_t len;
+ char *name;
+ char *val;
+ uint32_t num_mem = 0;
+ struct dom_sid *members = NULL;
+ int error = 0;
+
+ p = (uint8_t *)data.dptr;
+ if (data.dsize < 8) {
+ errno = EIO;
+ goto failed;
+ }
+
+ format = pull_uint32(p, 0);
+ num_el = pull_uint32(p, 4);
+ p += 8;
+
+ remaining = data.dsize - 8;
+
+ switch (format) {
+ case LTDB_PACKING_FORMAT:
+ len = strnlen((char *)p, remaining);
+ if (len == remaining) {
+ errno = EIO;
+ goto failed;
+ }
+
+ if (*p == '@') {
+ /* ignore special LDB attributes */
+ return 0;
+ }
+
+ if (strncmp((char *)p, "rid=", 4)) {
+ /* unknown entry, ignore */
+ DEBUG(3, ("Found unknown entry in group mapping "
+ "database named [%s]\n", (char *)p));
+ return 0;
+ }
+
+ remaining -= len + 1;
+ p += len + 1;
+ break;
+
+ case LTDB_PACKING_FORMAT_NODN:
+ default:
+ errno = EIO;
+ goto failed;
+ }
+
+ if (num_el == 0) {
+ /* bad entry, ignore */
+ return 0;
+ }
+
+ if (num_el > remaining / 6) {
+ errno = EIO;
+ goto failed;
+ }
+
+ map = talloc_zero(NULL, GROUP_MAP);
+ if (!map) {
+ errno = ENOMEM;
+ goto failed;
+ }
+
+ for (i = 0; i < num_el; i++) {
+ uint32_t num_vals;
+
+ if (remaining < 10) {
+ errno = EIO;
+ goto failed;
+ }
+ len = strnlen((char *)p, remaining - 6);
+ if (len == remaining - 6) {
+ errno = EIO;
+ goto failed;
+ }
+ name = talloc_strndup(tmp_ctx, (char *)p, len);
+ if (name == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+ remaining -= len + 1;
+ p += len + 1;
+
+ num_vals = pull_uint32(p, 0);
+ if (strcasecmp_m(name, "member") == 0) {
+ num_mem = num_vals;
+ members = talloc_array(tmp_ctx, struct dom_sid, num_mem);
+ if (members == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+ } else if (num_vals != 1) {
+ errno = EIO;
+ goto failed;
+ }
+
+ p += 4;
+ remaining -= 4;
+
+ for (j = 0; j < num_vals; j++) {
+ len = pull_uint32(p, 0);
+ if (len > remaining-5) {
+ errno = EIO;
+ goto failed;
+ }
+
+ val = talloc_strndup(tmp_ctx, (char *)(p + 4), len);
+ if (val == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+
+ remaining -= len+4+1;
+ p += len+4+1;
+
+ /* we ignore unknown or uninteresting attributes
+ * (objectclass, etc.) */
+ if (strcasecmp_m(name, "gidNumber") == 0) {
+ map->gid = smb_strtoul(val,
+ NULL,
+ 10,
+ &error,
+ SMB_STR_FULL_STR_CONV);
+ if (error != 0) {
+ errno = EIO;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "sid") == 0) {
+ if (!string_to_sid(&map->sid, val)) {
+ errno = EIO;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "sidNameUse") == 0) {
+ map->sid_name_use =
+ smb_strtoul(val,
+ NULL,
+ 10,
+ &error,
+ SMB_STR_FULL_STR_CONV);
+ if (error != 0) {
+ errno = EIO;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "ntname") == 0) {
+ map->nt_name = talloc_strdup(map, val);
+ if (!map->nt_name) {
+ errno = ENOMEM;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "comment") == 0) {
+ map->comment = talloc_strdup(map, val);
+ if (!map->comment) {
+ errno = ENOMEM;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "member") == 0) {
+ if (!string_to_sid(&members[j], val)) {
+ errno = EIO;
+ goto failed;
+ }
+ }
+
+ TALLOC_FREE(val);
+ }
+
+ TALLOC_FREE(name);
+ }
+
+ if (map->nt_name == NULL) {
+ errno = EIO;
+ goto failed;
+ }
+
+ if (map->comment == NULL) {
+ map->comment = talloc_strdup(map, "");
+ }
+ if (map->comment == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+
+ if (!add_mapping_entry(map, 0)) {
+ errno = EIO;
+ goto failed;
+ }
+
+ if (num_mem) {
+ for (j = 0; j < num_mem; j++) {
+ NTSTATUS status;
+ status = add_aliasmem(&map->sid, &members[j]);
+ if (!NT_STATUS_IS_OK(status)) {
+ errno = EIO;
+ goto failed;
+ }
+ }
+ }
+
+ if (remaining != 0) {
+ DEBUG(0, ("Error: %d bytes unread in ltdb_unpack_data\n",
+ remaining));
+ }
+
+ TALLOC_FREE(map);
+ return 0;
+
+failed:
+ TALLOC_FREE(map);
+ return -1;
+}
+
+static bool mapping_switch(const char *ldb_path)
+{
+ TDB_CONTEXT *ltdb;
+ TALLOC_CTX *frame;
+ char *new_path;
+ int ret;
+
+ frame = talloc_stackframe();
+
+ ltdb = tdb_open_log(ldb_path, 0, TDB_DEFAULT, O_RDONLY, 0600);
+ if (ltdb == NULL) goto failed;
+
+ /* ldb is just a very fancy tdb, read out raw data and perform
+ * conversion */
+ ret = tdb_traverse(ltdb, convert_ldb_record, NULL);
+ if (ret < 0) goto failed;
+
+ if (ltdb) {
+ tdb_close(ltdb);
+ ltdb = NULL;
+ }
+
+ /* now rename the old db out of the way */
+ new_path = state_path(talloc_tos(), "group_mapping.ldb.replaced");
+ if (!new_path) {
+ goto failed;
+ }
+ if (rename(ldb_path, new_path) != 0) {
+ DEBUG(0,("Failed to rename old group mapping database\n"));
+ goto failed;
+ }
+ TALLOC_FREE(frame);
+ return True;
+
+failed:
+ DEBUG(0, ("Failed to switch to tdb group mapping database\n"));
+ if (ltdb) tdb_close(ltdb);
+ TALLOC_FREE(frame);
+ return False;
+}
+
+static const struct mapping_backend tdb_backend = {
+ .add_mapping_entry = add_mapping_entry,
+ .get_group_map_from_sid = get_group_map_from_sid,
+ .get_group_map_from_gid = get_group_map_from_gid,
+ .get_group_map_from_ntname = get_group_map_from_ntname,
+ .group_map_remove = group_map_remove,
+ .enum_group_mapping = enum_group_mapping,
+ .one_alias_membership = one_alias_membership,
+ .add_aliasmem = add_aliasmem,
+ .del_aliasmem = del_aliasmem,
+ .enum_aliasmem = enum_aliasmem
+};
+
+/*
+ initialise the tdb mapping backend
+ */
+const struct mapping_backend *groupdb_tdb_init(void)
+{
+ if (!init_group_mapping()) {
+ DEBUG(0,("Failed to initialise tdb mapping backend\n"));
+ return NULL;
+ }
+
+ return &tdb_backend;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 19:29:20 +0000