/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
SMB client password change routine
Copyright (C) Andrew Tridgell 1994-1998
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
+ 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,
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.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-
-extern pstring global_myname;
-extern pstring scope;
-
/*************************************************************
-change a password on a remote machine using IPC calls
+ Change a password on a remote machine using IPC calls.
*************************************************************/
-BOOL remote_password_change(const char *remote_machine, const char *user_name,
- const char *old_passwd, const char *new_passwd,
- char *err_str, size_t err_str_len)
+
+NTSTATUS remote_password_change(const char *remote_machine, const char *user_name,
+ const char *old_passwd, const char *new_passwd,
+ char **err_str)
{
struct nmb_name calling, called;
- struct cli_state cli;
- struct in_addr ip;
+ struct cli_state *cli;
+ struct rpc_pipe_client *pipe_hnd;
+ struct sockaddr_storage ss;
+
+ NTSTATUS result;
+ bool pass_must_change = False;
- *err_str = '\0';
+ *err_str = NULL;
- if(!resolve_name( remote_machine, &ip, 0x20)) {
- slprintf(err_str, err_str_len-1, "unable to find an IP address for machine %s.\n",
- remote_machine );
- return False;
+ if(!resolve_name( remote_machine, &ss, 0x20)) {
+ asprintf(err_str, "Unable to find an IP address for machine "
+ "%s.\n", remote_machine);
+ return NT_STATUS_UNSUCCESSFUL;
}
- ZERO_STRUCT(cli);
-
- if (!cli_initialise(&cli) || !cli_connect(&cli, remote_machine, &ip)) {
- slprintf(err_str, err_str_len-1, "unable to connect to SMB server on machine %s. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- return False;
+ cli = cli_initialise();
+ if (!cli) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ result = cli_connect(cli, remote_machine, &ss);
+ if (!NT_STATUS_IS_OK(result)) {
+ asprintf(err_str, "Unable to connect to SMB server on "
+ "machine %s. Error was : %s.\n",
+ remote_machine, nt_errstr(result));
+ cli_shutdown(cli);
+ return result;
}
- make_nmb_name(&calling, global_myname , 0x0 , scope);
- make_nmb_name(&called , remote_machine, 0x20, scope);
+ make_nmb_name(&calling, global_myname() , 0x0);
+ make_nmb_name(&called , remote_machine, 0x20);
- if (!cli_session_request(&cli, &calling, &called)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the session setup. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+ if (!cli_session_request(cli, &calling, &called)) {
+ asprintf(err_str, "machine %s rejected the session setup. "
+ "Error was : %s.\n",
+ remote_machine, cli_errstr(cli) );
+ result = cli_nt_error(cli);
+ cli_shutdown(cli);
+ return result;
}
- cli.protocol = PROTOCOL_NT1;
+ cli->protocol = PROTOCOL_NT1;
- if (!cli_negprot(&cli)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the negotiate protocol. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+ if (!cli_negprot(cli)) {
+ asprintf(err_str, "machine %s rejected the negotiate "
+ "protocol. Error was : %s.\n",
+ remote_machine, cli_errstr(cli) );
+ result = cli_nt_error(cli);
+ cli_shutdown(cli);
+ return result;
}
- /*
- * We should connect as the anonymous user here, in case
- * the server has "must change password" checked...
- * Thanks to <Nicholas.S.Jenkins@cdc.com> for this fix.
- */
-
- if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the session setup. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
- }
-
- if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the tconX on the IPC$ share. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+ /* Given things like SMB signing, restrict anonymous and the like,
+ try an authenticated connection first */
+ result = cli_session_setup(cli, user_name,
+ old_passwd, strlen(old_passwd)+1,
+ old_passwd, strlen(old_passwd)+1, "");
+
+ if (!NT_STATUS_IS_OK(result)) {
+
+ /* Password must change or Password expired are the only valid
+ * error conditions here from where we can proceed, the rest like
+ * account locked out or logon failure will lead to errors later
+ * anyway */
+
+ if (!NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) &&
+ !NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED)) {
+ asprintf(err_str, "Could not connect to machine %s: "
+ "%s\n", remote_machine, cli_errstr(cli));
+ cli_shutdown(cli);
+ return result;
+ }
+
+ pass_must_change = True;
+
+ /*
+ * We should connect as the anonymous user here, in case
+ * the server has "must change password" checked...
+ * Thanks to <Nicholas.S.Jenkins@cdc.com> for this fix.
+ */
+
+ result = cli_session_setup(cli, "", "", 0, "", 0, "");
+
+ if (!NT_STATUS_IS_OK(result)) {
+ asprintf(err_str, "machine %s rejected the session "
+ "setup. Error was : %s.\n",
+ remote_machine, cli_errstr(cli) );
+ cli_shutdown(cli);
+ return result;
+ }
+
+ cli_init_creds(cli, "", "", NULL);
+ } else {
+ cli_init_creds(cli, user_name, "", old_passwd);
}
- if(!cli_oem_change_password(&cli, user_name, new_passwd, old_passwd)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the password change: Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+ if (!cli_send_tconX(cli, "IPC$", "IPC", "", 1)) {
+ asprintf(err_str, "machine %s rejected the tconX on the IPC$ "
+ "share. Error was : %s.\n",
+ remote_machine, cli_errstr(cli) );
+ result = cli_nt_error(cli);
+ cli_shutdown(cli);
+ return result;
}
+
+ /* Try not to give the password away too easily */
+
+ if (!pass_must_change) {
+ pipe_hnd = cli_rpc_pipe_open_ntlmssp(cli,
+ PI_SAMR,
+ PIPE_AUTH_LEVEL_PRIVACY,
+ "", /* what domain... ? */
+ user_name,
+ old_passwd,
+ &result);
+ } else {
+ /*
+ * If the user password must be changed the ntlmssp bind will
+ * fail the same way as the session setup above did. The
+ * difference ist that with a pipe bind we don't get a good
+ * error message, the result will be that the rpc call below
+ * will just fail. So we do it anonymously, there's no other
+ * way.
+ */
+ pipe_hnd = cli_rpc_pipe_open_noauth(cli, PI_SAMR, &result);
+ }
+
+ if (!pipe_hnd) {
+ if (lp_client_lanman_auth()) {
+ /* Use the old RAP method. */
+ if (!cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
+ asprintf(err_str, "machine %s rejected the "
+ "password change: Error was : %s.\n",
+ remote_machine, cli_errstr(cli) );
+ result = cli_nt_error(cli);
+ cli_shutdown(cli);
+ return result;
+ }
+ } else {
+ asprintf(err_str, "SAMR connection to machine %s "
+ "failed. Error was %s, but LANMAN password "
+ "changed are disabled\n",
+ nt_errstr(result), remote_machine);
+ result = cli_nt_error(cli);
+ cli_shutdown(cli);
+ return result;
+ }
+ }
+
+ result = rpccli_samr_chgpasswd_user(pipe_hnd, talloc_tos(),
+ user_name, new_passwd, old_passwd);
+ if (NT_STATUS_IS_OK(result)) {
+ /* Great - it all worked! */
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+
+ } else if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
+ || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
+ /* it failed, but for reasons such as wrong password, too short etc ... */
+
+ asprintf(err_str, "machine %s rejected the password change: "
+ "Error was : %s.\n",
+ remote_machine, get_friendly_nt_error_msg(result));
+ cli_shutdown(cli);
+ return result;
+ }
+
+ /* OK, that failed, so try again... */
+ TALLOC_FREE(pipe_hnd);
+
+ /* Try anonymous NTLMSSP... */
+ cli_init_creds(cli, "", "", NULL);
- cli_shutdown(&cli);
- return True;
+ result = NT_STATUS_UNSUCCESSFUL;
+
+ /* OK, this is ugly, but... try an anonymous pipe. */
+ pipe_hnd = cli_rpc_pipe_open_noauth(cli, PI_SAMR, &result);
+
+ if ( pipe_hnd &&
+ (NT_STATUS_IS_OK(result = rpccli_samr_chgpasswd_user(
+ pipe_hnd, talloc_tos(), user_name,
+ new_passwd, old_passwd)))) {
+ /* Great - it all worked! */
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+ } else {
+ if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
+ || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
+ /* it failed, but again it was due to things like new password too short */
+
+ asprintf(err_str, "machine %s rejected the "
+ "(anonymous) password change: Error was : "
+ "%s.\n", remote_machine,
+ get_friendly_nt_error_msg(result));
+ cli_shutdown(cli);
+ return result;
+ }
+
+ /* We have failed to change the user's password, and we think the server
+ just might not support SAMR password changes, so fall back */
+
+ if (lp_client_lanman_auth()) {
+ /* Use the old RAP method. */
+ if (cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
+ /* SAMR failed, but the old LanMan protocol worked! */
+
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+ }
+ asprintf(err_str, "machine %s rejected the password "
+ "change: Error was : %s.\n",
+ remote_machine, cli_errstr(cli) );
+ result = cli_nt_error(cli);
+ cli_shutdown(cli);
+ return result;
+ } else {
+ asprintf(err_str, "SAMR connection to machine %s "
+ "failed. Error was %s, but LANMAN password "
+ "changed are disabled\n",
+ nt_errstr(result), remote_machine);
+ cli_shutdown(cli);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+ }
}
git.samba.org / kai / samba.git / blobdiff