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-rw-r--r--source4/lib/samba3/group.c483
1 files changed, 483 insertions, 0 deletions
diff --git a/source4/lib/samba3/group.c b/source4/lib/samba3/group.c
new file mode 100644
index 0000000000..b8cc0d6819
--- /dev/null
+++ b/source4/lib/samba3/group.c
@@ -0,0 +1,483 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * RPC Pipe client / server routines
+ * Copyright (C) Andrew Tridgell 1992-2000,
+ * Copyright (C) Jean François Micouleau 1998-2001.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+#include "system/iconv.h"
+#include "lib/samba3/sam.h"
+#include "lib/tdb/include/tdbutil.h"
+#include "system/filesys.h"
+
+#define DATABASE_VERSION_V1 1 /* native byte format. */
+#define DATABASE_VERSION_V2 2 /* le format. */
+
+#define GROUP_PREFIX "UNIXGROUP/"
+
+/* Alias memberships are stored reverse, as memberships. The performance
+ * critical operation is to determine the aliases a SID is member of, not
+ * listing alias members. So we store a list of alias SIDs a SID is member of
+ * hanging of the member as key.
+ */
+#define MEMBEROF_PREFIX "MEMBEROF/"
+
+#define ENUM_ONLY_MAPPED True
+#define ENUM_ALL_MAPPED False
+
+
+/****************************************************************************
+dump the mapping group mapping to a text file
+****************************************************************************/
+static const char *decode_sid_name_use(enum SID_NAME_USE name_use)
+{
+ switch(name_use) {
+ case SID_NAME_USER:
+ return "User";
+ case SID_NAME_DOM_GRP:
+ return "Domain group";
+ case SID_NAME_DOMAIN:
+ return "Domain";
+ case SID_NAME_ALIAS:
+ return "Local group";
+ case SID_NAME_WKN_GRP:
+ return "Builtin group";
+ case SID_NAME_DELETED:
+ return "Deleted";
+ case SID_NAME_INVALID:
+ return "Invalid";
+ case SID_NAME_UNKNOWN:
+ default:
+ return "Unknown type";
+ }
+}
+
+/****************************************************************************
+ Open the group mapping tdb.
+****************************************************************************/
+static TDB_CONTEXT *tdbgroup_open(const char *file)
+{
+ int32_t vers_id;
+
+ TDB_CONTEXT *tdb = tdb_open(file, 0, TDB_DEFAULT, O_RDONLY, 0600);
+ if (!tdb) {
+ DEBUG(0,("Failed to open group mapping database\n"));
+ return NULL;
+ }
+
+ /* Cope with byte-reversed older versions of the db. */
+ vers_id = tdb_fetch_int32(tdb, "INFO/version");
+ 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. */
+ vers_id = DATABASE_VERSION_V2;
+ }
+
+ if (vers_id != DATABASE_VERSION_V2) {
+ return NULL;
+ }
+
+ return tdb;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+static BOOL get_group_map_from_sid(TDB_CONTEXT *tdb, struct dom_sid sid, struct samba3_groupmapping *map)
+{
+ TDB_DATA kbuf, dbuf;
+ const char *key;
+ int ret = 0;
+
+ /* the key is the SID, retrieving is direct */
+
+ kbuf.dptr = talloc_asprintf(tdb, "%s%s", GROUP_PREFIX, dom_sid_string(tdb, &sid));
+ kbuf.dsize = strlen(key)+1;
+
+ dbuf = tdb_fetch(tdb, kbuf);
+ if (!dbuf.dptr)
+ return False;
+
+ ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
+ &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
+
+ SAFE_FREE(dbuf.dptr);
+
+ if ( ret == -1 ) {
+ DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
+ return False;
+ }
+
+ map->sid = dom_sid_dup(tdb, &sid);
+
+ return True;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+static BOOL get_group_map_from_gid(TDB_CONTEXT *tdb, gid_t gid, struct samba3_groupmapping *map)
+{
+ TDB_DATA kbuf, dbuf, newkey;
+ int ret;
+
+ /* we need to enumerate the TDB to find the GID */
+
+ for (kbuf = tdb_firstkey(tdb);
+ kbuf.dptr;
+ newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+
+ if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
+
+ dbuf = tdb_fetch(tdb, kbuf);
+ if (!dbuf.dptr)
+ continue;
+
+
+ map->sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
+
+ ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
+ &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
+
+ SAFE_FREE(dbuf.dptr);
+
+ if ( ret == -1 ) {
+ DEBUG(3,("get_group_map_from_gid: tdb_unpack failure\n"));
+ return False;
+ }
+
+ if (gid==map->gid) {
+ SAFE_FREE(kbuf.dptr);
+ return True;
+ }
+ }
+
+ return False;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+static BOOL get_group_map_from_ntname(TDB_CONTEXT *tdb, const char *name, struct samba3_groupmapping *map)
+{
+ TDB_DATA kbuf, dbuf, newkey;
+ int ret;
+
+ /* we need to enumerate the TDB to find the name */
+
+ for (kbuf = tdb_firstkey(tdb);
+ kbuf.dptr;
+ newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+
+ if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
+
+ dbuf = tdb_fetch(tdb, kbuf);
+ if (!dbuf.dptr)
+ continue;
+
+ map->sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
+
+ ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
+ &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
+
+ SAFE_FREE(dbuf.dptr);
+
+ if ( ret == -1 ) {
+ DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n"));
+ return False;
+ }
+
+ if (StrCaseCmp(name, map->nt_name)==0) {
+ SAFE_FREE(kbuf.dptr);
+ return True;
+ }
+ }
+
+ return False;
+}
+
+/****************************************************************************
+ Enumerate the group mapping.
+****************************************************************************/
+
+static BOOL enum_group_mapping(TDB_CONTEXT *tdb, enum SID_NAME_USE sid_name_use, struct samba3_groupmapping **rmap,
+ int *num_entries, BOOL unix_only)
+{
+ TDB_DATA kbuf, dbuf, newkey;
+ struct samba3_groupmapping map;
+ struct samba3_groupmapping *mapt;
+ int ret;
+ int entries=0;
+
+ *num_entries=0;
+ *rmap=NULL;
+
+ for (kbuf = tdb_firstkey(tdb);
+ kbuf.dptr;
+ newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+
+ if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0)
+ continue;
+
+ dbuf = tdb_fetch(tdb, kbuf);
+ if (!dbuf.dptr)
+ continue;
+
+ map.sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
+
+ ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
+ &map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
+
+ SAFE_FREE(dbuf.dptr);
+
+ if ( ret == -1 ) {
+ DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
+ continue;
+ }
+
+ /* list only the type or everything if UNKNOWN */
+ if (sid_name_use!=SID_NAME_UNKNOWN && sid_name_use!=map.sid_name_use) {
+ DEBUG(11,("enum_group_mapping: group %s is not of the requested type\n", map.nt_name));
+ continue;
+ }
+
+ if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) {
+ DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name));
+ continue;
+ }
+
+ DEBUG(11,("enum_group_mapping: returning group %s of type %s\n", map.nt_name ,decode_sid_name_use(map.sid_name_use)));
+
+ mapt = talloc_realloc(tdb, *rmap, struct samba3_groupmapping, entries+1);
+ if (!mapt) {
+ DEBUG(0,("enum_group_mapping: Unable to enlarge group map!\n"));
+ SAFE_FREE(*rmap);
+ return False;
+ }
+ else
+ (*rmap) = mapt;
+
+ mapt[entries].gid = map.gid;
+ mapt[entries].sid = dom_sid_dup(tdb, map.sid);
+ mapt[entries].sid_name_use = map.sid_name_use;
+ mapt[entries].nt_name = map.nt_name;
+ mapt[entries].comment = map.comment;
+
+ entries++;
+
+ }
+
+ *num_entries=entries;
+
+ 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(TDB_CONTEXT *tdb,
+ const struct dom_sid *member, struct dom_sid **sids, int *num)
+{
+ TDB_DATA kbuf, dbuf;
+ const char *p;
+
+ char * key = talloc_asprintf(tdb, "%s%s", MEMBEROF_PREFIX, dom_sid_string(tdb, member));
+
+ kbuf.dsize = strlen(key)+1;
+ kbuf.dptr = key;
+
+ dbuf = tdb_fetch(tdb, kbuf);
+
+ if (dbuf.dptr == NULL) {
+ return NT_STATUS_OK;
+ }
+
+ p = dbuf.dptr;
+
+ while (next_token(&p, string_sid, " ", sizeof(string_sid))) {
+
+ struct dom_sid alias;
+
+ if (!string_to_sid(&alias, string_sid))
+ continue;
+
+ add_sid_to_array_unique(NULL, &alias, sids, num);
+
+ if (sids == NULL)
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ SAFE_FREE(dbuf.dptr);
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS alias_memberships(TDB_CONTEXT *tdb, const struct dom_sid *members, int num_members,
+ struct dom_sid **sids, int *num)
+{
+ int i;
+
+ *num = 0;
+ *sids = NULL;
+
+ for (i=0; i<num_members; i++) {
+ NTSTATUS status = one_alias_membership(tdb, &members[i], sids, num);
+ if (!NT_STATUS_IS_OK(status))
+ return status;
+ }
+ return NT_STATUS_OK;
+}
+
+struct aliasmem_closure {
+ const struct dom_sid *alias;
+ struct dom_sid **sids;
+ int *num;
+};
+
+static int collect_aliasmem(TDB_CONTEXT *tdb_ctx, TDB_DATA key, TDB_DATA data,
+ void *state)
+{
+ struct aliasmem_closure *closure = (struct aliasmem_closure *)state;
+ const char *p;
+ fstring alias_string;
+
+ if (strncmp(key.dptr, MEMBEROF_PREFIX,
+ strlen(MEMBEROF_PREFIX)) != 0)
+ return 0;
+
+ p = data.dptr;
+
+ while (next_token(&p, alias_string, " ", sizeof(alias_string))) {
+
+ struct dom_sid alias, member;
+ const char *member_string;
+
+
+ if (!string_to_sid(&alias, alias_string))
+ continue;
+
+ if (sid_compare(closure->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(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;
+
+ add_sid_to_array(NULL, &member, closure->sids, closure->num);
+ }
+
+ return 0;
+}
+
+static NTSTATUS enum_aliasmem(TDB_CONTEXT *tdb, const struct dom_sid *alias, struct dom_sid **sids, int *num)
+{
+ struct samba3_groupmapping map;
+ struct aliasmem_closure closure;
+
+ if (!get_group_map_from_sid(*alias, &map))
+ return NT_STATUS_NO_SUCH_ALIAS;
+
+ if ( (map.sid_name_use != SID_NAME_ALIAS) &&
+ (map.sid_name_use != SID_NAME_WKN_GRP) )
+ return NT_STATUS_NO_SUCH_ALIAS;
+
+ *sids = NULL;
+ *num = 0;
+
+ closure.alias = alias;
+ closure.sids = sids;
+ closure.num = num;
+
+ tdb_traverse(tdb, collect_aliasmem, &closure);
+ return NT_STATUS_OK;
+}
+
+/*
+ *
+ * High level functions
+ * better to use them than the lower ones.
+ *
+ * we are checking if the group is in the mapping file
+ * and if the group is an existing unix group
+ *
+ */
+
+/* get a domain group from it's SID */
+
+/* get a local (alias) group from it's SID */
+
+static BOOL get_local_group_from_sid(TDB_CONTEXT *tdb, struct dom_sid *sid, struct samba3_groupmapping *map)
+{
+ BOOL ret;
+
+ /* The group is in the mapping table */
+ ret = pdb_getgrsid(map, *sid);
+
+ if ( !ret )
+ return False;
+
+ if ( ( (map->sid_name_use != SID_NAME_ALIAS) &&
+ (map->sid_name_use != SID_NAME_WKN_GRP) )
+ || (map->gid == -1)
+ || (getgrgid(map->gid) == NULL) )
+ {
+ return False;
+ }
+
+#if 1 /* JERRY */
+ /* local groups only exist in the group mapping DB so this
+ is not necessary */
+
+ else {
+ /* the group isn't in the mapping table.
+ * make one based on the unix information */
+ uint32_t alias_rid;
+ struct group *grp;
+
+ sid_peek_rid(sid, &alias_rid);
+ map->gid=pdb_group_rid_to_gid(alias_rid);
+
+ grp = getgrgid(map->gid);
+ if ( !grp ) {
+ DEBUG(3,("get_local_group_from_sid: No unix group for [%ul]\n", map->gid));
+ return False;
+ }
+
+ map->sid_name_use=SID_NAME_ALIAS;
+
+ fstrcpy(map->nt_name, grp->gr_name);
+ fstrcpy(map->comment, "Local Unix Group");
+
+ sid_copy(&map->sid, sid);
+ }
+#endif
+
+ return True;
+}
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