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samba-mirror/source3/groupdb/mapping.c
2007-10-10 12:31:03 -05:00

727 lines
18 KiB
C

/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-2000,
* 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 "groupdb/mapping.h"
static const struct mapping_backend *backend;
/*
initialise a group mapping backend
*/
static BOOL init_group_mapping(void)
{
if (backend != NULL) {
/* already initialised */
return True;
}
backend = groupdb_ldb_init();
return backend != NULL;
}
/****************************************************************************
initialise first time the mapping list
****************************************************************************/
NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
{
GROUP_MAP map;
if(!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
map.gid=gid;
if (!string_to_sid(&map.sid, sid)) {
DEBUG(0, ("string_to_sid failed: %s", sid));
return NT_STATUS_UNSUCCESSFUL;
}
map.sid_name_use=sid_name_use;
fstrcpy(map.nt_name, nt_name);
fstrcpy(map.comment, comment);
return pdb_add_group_mapping_entry(&map);
}
static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
DOM_SID **sids, size_t *num)
{
size_t i;
*num = 0;
*sids = NULL;
for (i=0; i<num_members; i++) {
NTSTATUS status = backend->one_alias_membership(&members[i], sids, num);
if (!NT_STATUS_IS_OK(status))
return status;
}
return NT_STATUS_OK;
}
struct aliasmem_closure {
const DOM_SID *alias;
DOM_SID **sids;
size_t *num;
};
/*
*
* 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 */
BOOL get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map)
{
struct group *grp;
BOOL ret;
if(!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return(False);
}
DEBUG(10, ("get_domain_group_from_sid\n"));
/* if the group is NOT in the database, it CAN NOT be a domain group */
become_root();
ret = pdb_getgrsid(map, sid);
unbecome_root();
/* special case check for rid 513 */
if ( !ret ) {
uint32 rid;
sid_peek_rid( &sid, &rid );
if ( rid == DOMAIN_GROUP_RID_USERS ) {
fstrcpy( map->nt_name, "None" );
fstrcpy( map->comment, "Ordinary Users" );
sid_copy( &map->sid, &sid );
map->sid_name_use = SID_NAME_DOM_GRP;
map->gid = (gid_t)-1;
return True;
}
return False;
}
DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));
/* if it's not a domain group, continue */
if (map->sid_name_use!=SID_NAME_DOM_GRP) {
return False;
}
DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
if (map->gid==-1) {
return False;
}
DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
grp = getgrgid(map->gid);
if ( !grp ) {
DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
return False;
}
DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));
return True;
}
/****************************************************************************
Create a UNIX group on demand.
****************************************************************************/
int smb_create_group(const char *unix_group, gid_t *new_gid)
{
pstring add_script;
int ret = -1;
int fd = 0;
*new_gid = 0;
/* defer to scripts */
if ( *lp_addgroup_script() ) {
pstrcpy(add_script, lp_addgroup_script());
pstring_sub(add_script, "%g", unix_group);
ret = smbrun(add_script, &fd);
DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
if (ret == 0) {
smb_nscd_flush_group_cache();
}
if (ret != 0)
return ret;
if (fd != 0) {
fstring output;
*new_gid = 0;
if (read(fd, output, sizeof(output)) > 0) {
*new_gid = (gid_t)strtoul(output, NULL, 10);
}
close(fd);
}
}
if (*new_gid == 0) {
struct group *grp = getgrnam(unix_group);
if (grp != NULL)
*new_gid = grp->gr_gid;
}
return ret;
}
/****************************************************************************
Delete a UNIX group on demand.
****************************************************************************/
int smb_delete_group(const char *unix_group)
{
pstring del_script;
int ret;
/* defer to scripts */
if ( *lp_delgroup_script() ) {
pstrcpy(del_script, lp_delgroup_script());
pstring_sub(del_script, "%g", unix_group);
ret = smbrun(del_script,NULL);
DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
if (ret == 0) {
smb_nscd_flush_group_cache();
}
return ret;
}
return -1;
}
/****************************************************************************
Set a user's primary UNIX group.
****************************************************************************/
int smb_set_primary_group(const char *unix_group, const char* unix_user)
{
pstring add_script;
int ret;
/* defer to scripts */
if ( *lp_setprimarygroup_script() ) {
pstrcpy(add_script, lp_setprimarygroup_script());
all_string_sub(add_script, "%g", unix_group, sizeof(add_script));
all_string_sub(add_script, "%u", unix_user, sizeof(add_script));
ret = smbrun(add_script,NULL);
flush_pwnam_cache();
DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
"Running the command `%s' gave %d\n",add_script,ret));
if (ret == 0) {
smb_nscd_flush_group_cache();
}
return ret;
}
return -1;
}
/****************************************************************************
Add a user to a UNIX group.
****************************************************************************/
int smb_add_user_group(const char *unix_group, const char *unix_user)
{
pstring add_script;
int ret;
/* defer to scripts */
if ( *lp_addusertogroup_script() ) {
pstrcpy(add_script, lp_addusertogroup_script());
pstring_sub(add_script, "%g", unix_group);
pstring_sub(add_script, "%u", unix_user);
ret = smbrun(add_script,NULL);
DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
if (ret == 0) {
smb_nscd_flush_group_cache();
}
return ret;
}
return -1;
}
/****************************************************************************
Delete a user from a UNIX group
****************************************************************************/
int smb_delete_user_group(const char *unix_group, const char *unix_user)
{
pstring del_script;
int ret;
/* defer to scripts */
if ( *lp_deluserfromgroup_script() ) {
pstrcpy(del_script, lp_deluserfromgroup_script());
pstring_sub(del_script, "%g", unix_group);
pstring_sub(del_script, "%u", unix_user);
ret = smbrun(del_script,NULL);
DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
if (ret == 0) {
smb_nscd_flush_group_cache();
}
return ret;
}
return -1;
}
NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
DOM_SID sid)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->get_group_map_from_sid(sid, map) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
gid_t gid)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->get_group_map_from_gid(gid, map) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
const char *name)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->get_group_map_from_ntname(name, map) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
GROUP_MAP *map)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->add_mapping_entry(map, TDB_INSERT) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
GROUP_MAP *map)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->add_mapping_entry(map, TDB_REPLACE) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
DOM_SID sid)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->group_map_remove(&sid) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
const DOM_SID *sid, enum lsa_SidType sid_name_use,
GROUP_MAP **pp_rmap, size_t *p_num_entries,
BOOL unix_only)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
const char *name, uint32 *rid)
{
DOM_SID sid;
enum lsa_SidType type;
uint32 new_rid;
gid_t gid;
BOOL exists;
GROUP_MAP map;
TALLOC_CTX *mem_ctx;
NTSTATUS status;
DEBUG(10, ("Trying to create alias %s\n", name));
mem_ctx = talloc_new(NULL);
if (mem_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
exists = lookup_name(mem_ctx, name, LOOKUP_NAME_ISOLATED,
NULL, NULL, &sid, &type);
TALLOC_FREE(mem_ctx);
if (exists) {
return NT_STATUS_ALIAS_EXISTS;
}
if (!winbind_allocate_gid(&gid)) {
DEBUG(3, ("Could not get a gid out of winbind\n"));
return NT_STATUS_ACCESS_DENIED;
}
if (!pdb_new_rid(&new_rid)) {
DEBUG(0, ("Could not allocate a RID -- wasted a gid :-(\n"));
return NT_STATUS_ACCESS_DENIED;
}
DEBUG(10, ("Creating alias %s with gid %d and rid %d\n",
name, gid, new_rid));
sid_copy(&sid, get_global_sam_sid());
sid_append_rid(&sid, new_rid);
map.gid = gid;
sid_copy(&map.sid, &sid);
map.sid_name_use = SID_NAME_ALIAS;
fstrcpy(map.nt_name, name);
fstrcpy(map.comment, "");
status = pdb_add_group_mapping_entry(&map);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Could not add group mapping entry for alias %s "
"(%s)\n", name, nt_errstr(status)));
return status;
}
*rid = new_rid;
return NT_STATUS_OK;
}
NTSTATUS pdb_default_delete_alias(struct pdb_methods *methods,
const DOM_SID *sid)
{
return pdb_delete_group_mapping_entry(*sid);
}
NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
const DOM_SID *sid,
struct acct_info *info)
{
GROUP_MAP map;
if (!pdb_getgrsid(&map, *sid))
return NT_STATUS_NO_SUCH_ALIAS;
if ((map.sid_name_use != SID_NAME_ALIAS) &&
(map.sid_name_use != SID_NAME_WKN_GRP)) {
DEBUG(2, ("%s is a %s, expected an alias\n",
sid_string_static(sid),
sid_type_lookup(map.sid_name_use)));
return NT_STATUS_NO_SUCH_ALIAS;
}
fstrcpy(info->acct_name, map.nt_name);
fstrcpy(info->acct_desc, map.comment);
sid_peek_rid(&map.sid, &info->rid);
return NT_STATUS_OK;
}
NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
const DOM_SID *sid,
struct acct_info *info)
{
GROUP_MAP map;
if (!pdb_getgrsid(&map, *sid))
return NT_STATUS_NO_SUCH_ALIAS;
fstrcpy(map.nt_name, info->acct_name);
fstrcpy(map.comment, info->acct_desc);
return pdb_update_group_mapping_entry(&map);
}
NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
const DOM_SID *alias, const DOM_SID *member)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->add_aliasmem(alias, member);
}
NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
const DOM_SID *alias, const DOM_SID *member)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->del_aliasmem(alias, member);
}
NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
const DOM_SID *alias, DOM_SID **pp_members,
size_t *p_num_members)
{
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
return backend->enum_aliasmem(alias, pp_members, p_num_members);
}
NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
TALLOC_CTX *mem_ctx,
const DOM_SID *domain_sid,
const DOM_SID *members,
size_t num_members,
uint32 **pp_alias_rids,
size_t *p_num_alias_rids)
{
DOM_SID *alias_sids;
size_t i, num_alias_sids;
NTSTATUS result;
if (!init_group_mapping()) {
DEBUG(0,("failed to initialize group mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
alias_sids = NULL;
num_alias_sids = 0;
result = alias_memberships(members, num_members,
&alias_sids, &num_alias_sids);
if (!NT_STATUS_IS_OK(result))
return result;
*p_num_alias_rids = 0;
if (num_alias_sids == 0) {
TALLOC_FREE(alias_sids);
return NT_STATUS_OK;
}
*pp_alias_rids = TALLOC_ARRAY(mem_ctx, uint32, num_alias_sids);
if (*pp_alias_rids == NULL)
return NT_STATUS_NO_MEMORY;
for (i=0; i<num_alias_sids; i++) {
if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
&(*pp_alias_rids)[*p_num_alias_rids]))
continue;
*p_num_alias_rids += 1;
}
TALLOC_FREE(alias_sids);
return NT_STATUS_OK;
}
/**********************************************************************
no ops for passdb backends that don't implement group mapping
*********************************************************************/
NTSTATUS pdb_nop_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
DOM_SID sid)
{
return NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_nop_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
gid_t gid)
{
return NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_nop_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
const char *name)
{
return NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_nop_add_group_mapping_entry(struct pdb_methods *methods,
GROUP_MAP *map)
{
return NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_nop_update_group_mapping_entry(struct pdb_methods *methods,
GROUP_MAP *map)
{
return NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
DOM_SID sid)
{
return NT_STATUS_UNSUCCESSFUL;
}
NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
enum lsa_SidType sid_name_use,
GROUP_MAP **rmap, size_t *num_entries,
BOOL unix_only)
{
return NT_STATUS_UNSUCCESSFUL;
}
/****************************************************************************
These need to be redirected through pdb_interface.c
****************************************************************************/
BOOL pdb_get_dom_grp_info(const DOM_SID *sid, struct acct_info *info)
{
GROUP_MAP map;
BOOL res;
become_root();
res = get_domain_group_from_sid(*sid, &map);
unbecome_root();
if (!res)
return False;
fstrcpy(info->acct_name, map.nt_name);
fstrcpy(info->acct_desc, map.comment);
sid_peek_rid(sid, &info->rid);
return True;
}
BOOL pdb_set_dom_grp_info(const DOM_SID *sid, const struct acct_info *info)
{
GROUP_MAP map;
if (!get_domain_group_from_sid(*sid, &map))
return False;
fstrcpy(map.nt_name, info->acct_name);
fstrcpy(map.comment, info->acct_desc);
return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
}
/********************************************************************
Really just intended to be called by smbd
********************************************************************/
NTSTATUS pdb_create_builtin_alias(uint32 rid)
{
DOM_SID sid;
enum lsa_SidType type;
gid_t gid;
GROUP_MAP map;
TALLOC_CTX *mem_ctx;
NTSTATUS status;
const char *name = NULL;
fstring groupname;
DEBUG(10, ("Trying to create builtin alias %d\n", rid));
if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
return NT_STATUS_NO_SUCH_ALIAS;
}
if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
return NT_STATUS_NO_MEMORY;
}
if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
TALLOC_FREE( mem_ctx );
return NT_STATUS_NO_SUCH_ALIAS;
}
/* validate RID so copy the name and move on */
fstrcpy( groupname, name );
TALLOC_FREE( mem_ctx );
if (!winbind_allocate_gid(&gid)) {
DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
return NT_STATUS_ACCESS_DENIED;
}
DEBUG(10,("Creating alias %s with gid %d\n", name, gid));
map.gid = gid;
sid_copy(&map.sid, &sid);
map.sid_name_use = SID_NAME_ALIAS;
fstrcpy(map.nt_name, name);
fstrcpy(map.comment, "");
status = pdb_add_group_mapping_entry(&map);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
"(%s)\n", rid, nt_errstr(status)));
}
return status;
}