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/*
Unix SMB/CIFS implementation.
kpasswd Server implementation
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
Copyright (C) Andrew Tridgell 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 "dsdb/samdb/samdb.h"
#include "../lib/util/util_ldb.h"
#include "libcli/security/security.h"
#include "dsdb/common/util.h"
#include "auth/auth.h"
#include "kdc/kpasswd_glue.h"
/*
A user password change
Return true if there is a valid error packet (or success) formed in
the error_blob
*/
NTSTATUS samdb_kpasswd_change_password(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
struct tevent_context *event_ctx,
struct ldb_context *samdb,
struct auth_session_info *session_info,
const DATA_BLOB *password,
enum samPwdChangeReason *reject_reason,
struct samr_DomInfo1 **dominfo,
const char **error_string,
NTSTATUS *result)
{
struct samr_Password *oldLmHash, *oldNtHash;
const char * const attrs[] = { "dBCSPwd", "unicodePwd", NULL };
struct ldb_message *msg;
NTSTATUS status;
int ret;
/* Fetch the old hashes to get the old password in order to perform
* the password change operation. Naturally it would be much better to
* have a password hash from an authentication around but this doesn't
* seem to be the case here. */
ret = dsdb_search_one(samdb, mem_ctx, &msg, ldb_get_default_basedn(samdb),
LDB_SCOPE_SUBTREE,
attrs,
DSDB_SEARCH_NO_GLOBAL_CATALOG,
"(&(objectClass=user)(sAMAccountName=%s))",
session_info->info->account_name);
if (ret != LDB_SUCCESS) {
*error_string = "No such user when changing password";
return NT_STATUS_NO_SUCH_USER;
}
/*
* No need to check for password lockout here, the KDC will
* have done that when issuing the ticket, which is not based
* on the user's password
*/
status = samdb_result_passwords_no_lockout(mem_ctx, lp_ctx, msg,
&oldLmHash, &oldNtHash);
if (!NT_STATUS_IS_OK(status)) {
*error_string = "Not permitted to change password";
return NT_STATUS_ACCESS_DENIED;
}
/* Start a SAM with user privileges for the password change */
samdb = samdb_connect(mem_ctx, event_ctx, lp_ctx,
session_info, 0);
if (!samdb) {
*error_string = "Failed to open samdb";
return NT_STATUS_ACCESS_DENIED;
}
DEBUG(3, ("Changing password of %s\\%s (%s)\n",
session_info->info->domain_name,
session_info->info->account_name,
dom_sid_string(mem_ctx, &session_info->security_token->sids[PRIMARY_USER_SID_INDEX])));
/* Performs the password change */
status = samdb_set_password_sid(samdb,
mem_ctx,
&session_info->security_token->sids[PRIMARY_USER_SID_INDEX],
NULL,
password,
NULL,
NULL,
oldLmHash,
oldNtHash, /* this is a user password change */
reject_reason,
dominfo);
if (!NT_STATUS_IS_OK(status)) {
*error_string = nt_errstr(status);
}
*result = status;
return NT_STATUS_OK;
}
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