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|
/*
Unix SMB/CIFS implementation.
Winbind ADS backend functions
Copyright (C) Andrew Tridgell 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 "winbindd.h"
#ifdef HAVE_ADS
/* the realm of our primary LDAP server */
static char *primary_realm;
/*
a wrapper around ldap_search_s that retries depending on the error code
this is supposed to catch dropped connections and auto-reconnect
*/
ADS_STATUS ads_do_search_retry(ADS_STRUCT *ads, const char *bind_path, int scope,
const char *exp,
const char **attrs, void **res)
{
ADS_STATUS status;
int count = 3;
char *bp;
if (!ads->ld &&
time(NULL) - ads->last_attempt < ADS_RECONNECT_TIME) {
return ADS_ERROR(LDAP_SERVER_DOWN);
}
bp = strdup(bind_path);
while (count--) {
status = ads_do_search_all(ads, bp, scope, exp, attrs, res);
if (ADS_ERR_OK(status)) {
DEBUG(5,("Search for %s gave %d replies\n",
exp, ads_count_replies(ads, *res)));
free(bp);
return status;
}
if (*res) ads_msgfree(ads, *res);
*res = NULL;
DEBUG(1,("Reopening ads connection to %s after error %s\n",
ads->ldap_server, ads_errstr(status)));
if (ads->ld) {
ldap_unbind(ads->ld);
}
ads->ld = NULL;
status = ads_connect(ads);
if (!ADS_ERR_OK(status)) {
DEBUG(1,("ads_search_retry: failed to reconnect (%s)\n",
ads_errstr(status)));
ads_destroy(&ads);
free(bp);
return status;
}
}
free(bp);
DEBUG(1,("ads reopen failed after error %s\n", ads_errstr(status)));
return status;
}
ADS_STATUS ads_search_retry(ADS_STRUCT *ads, void **res,
const char *exp,
const char **attrs)
{
return ads_do_search_retry(ads, ads->bind_path, LDAP_SCOPE_SUBTREE,
exp, attrs, res);
}
ADS_STATUS ads_search_retry_dn(ADS_STRUCT *ads, void **res,
const char *dn,
const char **attrs)
{
return ads_do_search_retry(ads, dn, LDAP_SCOPE_BASE,
"(objectclass=*)", attrs, res);
}
/*
return our ads connections structure for a domain. We keep the connection
open to make things faster
*/
static ADS_STRUCT *ads_cached_connection(struct winbindd_domain *domain)
{
ADS_STRUCT *ads;
ADS_STATUS status;
char *ccache;
struct in_addr server_ip;
char *sname;
if (domain->private) {
return (ADS_STRUCT *)domain->private;
}
/* we don't want this to affect the users ccache */
ccache = lock_path("winbindd_ccache");
SETENV("KRB5CCNAME", ccache, 1);
unlink(ccache);
if (resolve_name(domain->name, &server_ip, 0x1b)) {
sname = inet_ntoa(server_ip);
} else {
if (strcasecmp(domain->name, lp_workgroup()) != 0) {
DEBUG(1,("can't find domain controller for %s\n", domain->name));
return NULL;
}
sname = NULL;
}
ads = ads_init(primary_realm, sname, NULL, NULL);
if (!ads) {
DEBUG(1,("ads_init for domain %s failed\n", domain->name));
return NULL;
}
/* the machine acct password might have change - fetch it every time */
SAFE_FREE(ads->password);
ads->password = secrets_fetch_machine_password();
status = ads_connect(ads);
if (!ADS_ERR_OK(status)) {
extern struct winbindd_methods msrpc_methods;
DEBUG(1,("ads_connect for domain %s failed: %s\n",
domain->name, ads_errstr(status)));
ads_destroy(&ads);
/* if we get ECONNREFUSED then it might be a NT4
server, fall back to MSRPC */
if (status.error_type == ADS_ERROR_SYSTEM &&
status.rc == ECONNREFUSED) {
DEBUG(1,("Trying MSRPC methods\n"));
domain->methods = &msrpc_methods;
}
return NULL;
}
/* remember our primary realm for trusted domain support */
if (!primary_realm) {
primary_realm = strdup(ads->realm);
}
fstrcpy(domain->full_name, ads->server_realm);
domain->private = (void *)ads;
return ads;
}
/* useful utility */
static void sid_from_rid(struct winbindd_domain *domain, uint32 rid, DOM_SID *sid)
{
sid_copy(sid, &domain->sid);
sid_append_rid(sid, rid);
}
/* turn a sAMAccountType into a SID_NAME_USE */
static enum SID_NAME_USE ads_atype_map(uint32 atype)
{
switch (atype & 0xF0000000) {
case ATYPE_GROUP:
return SID_NAME_DOM_GRP;
case ATYPE_USER:
return SID_NAME_USER;
default:
DEBUG(1,("hmm, need to map account type 0x%x\n", atype));
}
return SID_NAME_UNKNOWN;
}
/*
in order to support usernames longer than 21 characters we need to
use both the sAMAccountName and the userPrincipalName attributes
It seems that not all users have the userPrincipalName attribute set
*/
char *pull_username(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, void *msg)
{
char *ret, *p;
ret = ads_pull_string(ads, mem_ctx, msg, "userPrincipalName");
if (ret && (p = strchr(ret, '@'))) {
*p = 0;
return ret;
}
return ads_pull_string(ads, mem_ctx, msg, "sAMAccountName");
}
/* Query display info for a realm. This is the basic user list fn */
static NTSTATUS query_user_list(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32 *num_entries,
WINBIND_USERINFO **info)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"userPrincipalName",
"sAMAccountName",
"name", "objectSid", "primaryGroupID",
"sAMAccountType", NULL};
int i, count;
ADS_STATUS rc;
void *res = NULL;
void *msg = NULL;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
*num_entries = 0;
DEBUG(3,("ads: query_user_list\n"));
ads = ads_cached_connection(domain);
if (!ads) goto done;
rc = ads_search_retry(ads, &res, "(objectCategory=user)", attrs);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("query_user_list ads_search: %s\n", ads_errstr(rc)));
goto done;
}
count = ads_count_replies(ads, res);
if (count == 0) {
DEBUG(1,("query_user_list: No users found\n"));
goto done;
}
(*info) = talloc_zero(mem_ctx, count * sizeof(**info));
if (!*info) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
i = 0;
for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
char *name, *gecos;
DOM_SID sid;
uint32 rid, group;
uint32 atype;
if (!ads_pull_uint32(ads, msg, "sAMAccountType", &atype) ||
ads_atype_map(atype) != SID_NAME_USER) {
DEBUG(1,("Not a user account? atype=0x%x\n", atype));
continue;
}
name = pull_username(ads, mem_ctx, msg);
gecos = ads_pull_string(ads, mem_ctx, msg, "name");
if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
DEBUG(1,("No sid for %s !?\n", name));
continue;
}
if (!ads_pull_uint32(ads, msg, "primaryGroupID", &group)) {
DEBUG(1,("No primary group for %s !?\n", name));
continue;
}
if (!sid_peek_rid(&sid, &rid)) {
DEBUG(1,("No rid for %s !?\n", name));
continue;
}
(*info)[i].acct_name = name;
(*info)[i].full_name = gecos;
(*info)[i].user_rid = rid;
(*info)[i].group_rid = group;
i++;
}
(*num_entries) = i;
status = NT_STATUS_OK;
DEBUG(3,("ads query_user_list gave %d entries\n", (*num_entries)));
done:
if (res) ads_msgfree(ads, res);
return status;
}
/* list all domain groups */
static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32 *num_entries,
struct acct_info **info)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"userPrincipalName", "sAMAccountName",
"name", "objectSid",
"sAMAccountType", NULL};
int i, count;
ADS_STATUS rc;
void *res = NULL;
void *msg = NULL;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
*num_entries = 0;
DEBUG(3,("ads: enum_dom_groups\n"));
ads = ads_cached_connection(domain);
if (!ads) goto done;
rc = ads_search_retry(ads, &res, "(objectCategory=group)", attrs);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("query_user_list ads_search: %s\n", ads_errstr(rc)));
goto done;
}
count = ads_count_replies(ads, res);
if (count == 0) {
DEBUG(1,("query_user_list: No users found\n"));
goto done;
}
(*info) = talloc_zero(mem_ctx, count * sizeof(**info));
if (!*info) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
i = 0;
for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
char *name, *gecos;
DOM_SID sid;
uint32 rid;
uint32 account_type;
if (!ads_pull_uint32(ads, msg, "sAMAccountType",
&account_type) ||
!(account_type & ATYPE_GROUP)) continue;
name = pull_username(ads, mem_ctx, msg);
gecos = ads_pull_string(ads, mem_ctx, msg, "name");
if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
DEBUG(1,("No sid for %s !?\n", name));
continue;
}
if (!sid_peek_rid(&sid, &rid)) {
DEBUG(1,("No rid for %s !?\n", name));
continue;
}
fstrcpy((*info)[i].acct_name, name);
fstrcpy((*info)[i].acct_desc, gecos);
(*info)[i].rid = rid;
i++;
}
(*num_entries) = i;
status = NT_STATUS_OK;
DEBUG(3,("ads enum_dom_groups gave %d entries\n", (*num_entries)));
done:
if (res) ads_msgfree(ads, res);
return status;
}
/* convert a single name to a sid in a domain */
static NTSTATUS name_to_sid(struct winbindd_domain *domain,
const char *name,
DOM_SID *sid,
enum SID_NAME_USE *type)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"objectSid", "sAMAccountType", NULL};
int count;
ADS_STATUS rc;
void *res = NULL;
char *exp;
uint32 t;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
DEBUG(3,("ads: name_to_sid\n"));
ads = ads_cached_connection(domain);
if (!ads) goto done;
/* accept either the win2000 or the pre-win2000 username */
asprintf(&exp, "(|(sAMAccountName=%s)(userPrincipalName=%s@%s))",
name, name, ads->realm);
rc = ads_search_retry(ads, &res, exp, attrs);
free(exp);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("name_to_sid ads_search: %s\n", ads_errstr(rc)));
goto done;
}
count = ads_count_replies(ads, res);
if (count != 1) {
DEBUG(1,("name_to_sid: %s not found\n", name));
goto done;
}
if (!ads_pull_sid(ads, res, "objectSid", sid)) {
DEBUG(1,("No sid for %s !?\n", name));
goto done;
}
if (!ads_pull_uint32(ads, res, "sAMAccountType", &t)) {
DEBUG(1,("No sAMAccountType for %s !?\n", name));
goto done;
}
*type = ads_atype_map(t);
status = NT_STATUS_OK;
DEBUG(3,("ads name_to_sid mapped %s\n", name));
done:
if (res) ads_msgfree(ads, res);
return status;
}
/* convert a sid to a user or group name */
static NTSTATUS sid_to_name(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
DOM_SID *sid,
char **name,
enum SID_NAME_USE *type)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"userPrincipalName",
"sAMAccountName",
"sAMAccountType", NULL};
ADS_STATUS rc;
void *msg = NULL;
char *exp;
char *sidstr;
uint32 atype;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
DEBUG(3,("ads: sid_to_name\n"));
ads = ads_cached_connection(domain);
if (!ads) goto done;
sidstr = sid_binstring(sid);
asprintf(&exp, "(objectSid=%s)", sidstr);
rc = ads_search_retry(ads, &msg, exp, attrs);
free(exp);
free(sidstr);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("sid_to_name ads_search: %s\n", ads_errstr(rc)));
goto done;
}
if (!ads_pull_uint32(ads, msg, "sAMAccountType", &atype)) {
goto done;
}
*name = pull_username(ads, mem_ctx, msg);
*type = ads_atype_map(atype);
status = NT_STATUS_OK;
DEBUG(3,("ads sid_to_name mapped %s\n", *name));
done:
if (msg) ads_msgfree(ads, msg);
return status;
}
/* convert a sid to a distnguished name */
static NTSTATUS sid_to_distinguished_name(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
DOM_SID *sid,
char **dn)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"distinguishedName", NULL};
ADS_STATUS rc;
void *msg = NULL;
char *exp;
char *sidstr;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
DEBUG(3,("ads: sid_to_distinguished_name\n"));
ads = ads_cached_connection(domain);
if (!ads) goto done;
sidstr = sid_binstring(sid);
asprintf(&exp, "(objectSid=%s)", sidstr);
rc = ads_search_retry(ads, &msg, exp, attrs);
free(exp);
free(sidstr);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("sid_to_distinguished_name ads_search: %s\n", ads_errstr(rc)));
goto done;
}
*dn = ads_pull_string(ads, mem_ctx, msg, "distinguishedName");
status = NT_STATUS_OK;
DEBUG(3,("ads sid_to_distinguished_name mapped %s\n", *dn));
done:
if (msg) ads_msgfree(ads, msg);
return status;
}
/* Lookup user information from a rid */
static NTSTATUS query_user(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32 user_rid,
WINBIND_USERINFO *info)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"userPrincipalName",
"sAMAccountName",
"name", "objectSid",
"primaryGroupID", NULL};
ADS_STATUS rc;
int count;
void *msg = NULL;
char *exp;
DOM_SID sid;
char *sidstr;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
DEBUG(3,("ads: query_user\n"));
sid_from_rid(domain, user_rid, &sid);
ads = ads_cached_connection(domain);
if (!ads) goto done;
sidstr = sid_binstring(&sid);
asprintf(&exp, "(objectSid=%s)", sidstr);
rc = ads_search_retry(ads, &msg, exp, attrs);
free(exp);
free(sidstr);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("query_user(rid=%d) ads_search: %s\n", user_rid, ads_errstr(rc)));
goto done;
}
count = ads_count_replies(ads, msg);
if (count != 1) {
DEBUG(1,("query_user(rid=%d): Not found\n", user_rid));
goto done;
}
info->acct_name = pull_username(ads, mem_ctx, msg);
info->full_name = ads_pull_string(ads, mem_ctx, msg, "name");
if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
DEBUG(1,("No sid for %d !?\n", user_rid));
goto done;
}
if (!ads_pull_uint32(ads, msg, "primaryGroupID", &info->group_rid)) {
DEBUG(1,("No primary group for %d !?\n", user_rid));
goto done;
}
if (!sid_peek_rid(&sid, &info->user_rid)) {
DEBUG(1,("No rid for %d !?\n", user_rid));
goto done;
}
status = NT_STATUS_OK;
DEBUG(3,("ads query_user gave %s\n", info->acct_name));
done:
if (msg) ads_msgfree(ads, msg);
return status;
}
/* Lookup groups a user is a member of. */
static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32 user_rid,
uint32 *num_groups, uint32 **user_gids)
{
ADS_STRUCT *ads = NULL;
const char *attrs[] = {"distinguishedName", NULL};
const char *attrs2[] = {"tokenGroups", "primaryGroupID", NULL};
ADS_STATUS rc;
int count;
void *msg = NULL;
char *exp;
char *user_dn;
DOM_SID *sids;
int i;
uint32 primary_group;
DOM_SID sid;
char *sidstr;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
*num_groups = 0;
DEBUG(3,("ads: lookup_usergroups\n"));
(*num_groups) = 0;
sid_from_rid(domain, user_rid, &sid);
ads = ads_cached_connection(domain);
if (!ads) goto done;
sidstr = sid_binstring(&sid);
asprintf(&exp, "(objectSid=%s)", sidstr);
rc = ads_search_retry(ads, &msg, exp, attrs);
free(exp);
free(sidstr);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("lookup_usergroups(rid=%d) ads_search: %s\n", user_rid, ads_errstr(rc)));
goto done;
}
user_dn = ads_pull_string(ads, mem_ctx, msg, "distinguishedName");
if (msg) ads_msgfree(ads, msg);
rc = ads_search_retry_dn(ads, &msg, user_dn, attrs2);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("lookup_usergroups(rid=%d) ads_search tokenGroups: %s\n", user_rid, ads_errstr(rc)));
goto done;
}
if (!ads_pull_uint32(ads, msg, "primaryGroupID", &primary_group)) {
DEBUG(1,("%s: No primary group for rid=%d !?\n", domain->name, user_rid));
goto done;
}
count = ads_pull_sids(ads, mem_ctx, msg, "tokenGroups", &sids) + 1;
(*user_gids) = (uint32 *)talloc_zero(mem_ctx, sizeof(uint32) * count);
(*user_gids)[(*num_groups)++] = primary_group;
for (i=1;i<count;i++) {
uint32 rid;
if (!sid_peek_rid(&sids[i-1], &rid)) continue;
(*user_gids)[*num_groups] = rid;
(*num_groups)++;
}
status = NT_STATUS_OK;
DEBUG(3,("ads lookup_usergroups for rid=%d\n", user_rid));
done:
if (msg) ads_msgfree(ads, msg);
return status;
}
static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32 group_rid, uint32 *num_names,
uint32 **rid_mem, char ***names,
uint32 **name_types)
{
DOM_SID group_sid;
const char *attrs[] = {"userPrincipalName", "sAMAccountName",
"objectSid", "sAMAccountType", NULL};
ADS_STATUS rc;
int count;
void *res=NULL, *msg=NULL;
ADS_STRUCT *ads = NULL;
char *exp, *dn = NULL;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
*num_names = 0;
ads = ads_cached_connection(domain);
if (!ads) goto done;
sid_from_rid(domain, group_rid, &group_sid);
status = sid_to_distinguished_name(domain, mem_ctx, &group_sid, &dn);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3,("Failed to find distinguishedName for %s\n", sid_string_static(&group_sid)));
return status;
}
/* search for all users who have that group sid as primary group or as member */
asprintf(&exp, "(&(objectCategory=user)(|(primaryGroupID=%d)(memberOf=%s)))",
group_rid, dn);
rc = ads_search_retry(ads, &res, exp, attrs);
free(exp);
if (!ADS_ERR_OK(rc)) {
DEBUG(1,("query_user_list ads_search: %s\n", ads_errstr(rc)));
goto done;
}
count = ads_count_replies(ads, res);
if (count == 0) {
status = NT_STATUS_OK;
goto done;
}
(*rid_mem) = talloc_zero(mem_ctx, sizeof(uint32) * count);
(*name_types) = talloc_zero(mem_ctx, sizeof(uint32) * count);
(*names) = talloc_zero(mem_ctx, sizeof(char *) * count);
for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
uint32 atype, rid;
DOM_SID sid;
(*names)[*num_names] = pull_username(ads, mem_ctx, msg);
if (!ads_pull_uint32(ads, msg, "sAMAccountType", &atype)) {
continue;
}
(*name_types)[*num_names] = ads_atype_map(atype);
if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
DEBUG(1,("No sid for %s !?\n", (*names)[*num_names]));
continue;
}
if (!sid_peek_rid(&sid, &rid)) {
DEBUG(1,("No rid for %s !?\n", (*names)[*num_names]));
continue;
}
(*rid_mem)[*num_names] = rid;
(*num_names)++;
}
status = NT_STATUS_OK;
DEBUG(3,("ads lookup_groupmem for rid=%d\n", group_rid));
done:
if (res) ads_msgfree(ads, res);
return status;
}
/* find the sequence number for a domain */
static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
{
ADS_STRUCT *ads = NULL;
ADS_STATUS rc;
*seq = DOM_SEQUENCE_NONE;
ads = ads_cached_connection(domain);
if (!ads) return NT_STATUS_UNSUCCESSFUL;
rc = ads_USN(ads, seq);
if (!ADS_ERR_OK(rc)) {
/* its a dead connection */
ads_destroy(&ads);
domain->private = NULL;
}
return ads_ntstatus(rc);
}
/* get a list of trusted domains */
static NTSTATUS trusted_domains(struct winbindd_domain *domain,
TALLOC_CTX *mem_ctx,
uint32 *num_domains,
char ***names,
DOM_SID **dom_sids)
{
ADS_STRUCT *ads;
ADS_STATUS rc;
*num_domains = 0;
*names = NULL;
ads = ads_cached_connection(domain);
if (!ads) return NT_STATUS_UNSUCCESSFUL;
rc = ads_trusted_domains(ads, mem_ctx, num_domains, names, dom_sids);
return ads_ntstatus(rc);
}
/* find the domain sid for a domain */
static NTSTATUS domain_sid(struct winbindd_domain *domain, DOM_SID *sid)
{
ADS_STRUCT *ads;
ADS_STATUS rc;
ads = ads_cached_connection(domain);
if (!ads) return NT_STATUS_UNSUCCESSFUL;
rc = ads_domain_sid(ads, sid);
if (!ADS_ERR_OK(rc)) {
/* its a dead connection */
ads_destroy(&ads);
domain->private = NULL;
}
return ads_ntstatus(rc);
}
/* the ADS backend methods are exposed via this structure */
struct winbindd_methods ads_methods = {
True,
query_user_list,
enum_dom_groups,
name_to_sid,
sid_to_name,
query_user,
lookup_usergroups,
lookup_groupmem,
sequence_number,
trusted_domains,
domain_sid
};
#endif
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