--- /dev/null
+/*
+ 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
+ (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"
+
+/*************************************************************
+ 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)
+{
+ struct nmb_name calling, called;
+ struct cli_state cli;
+ struct rpc_pipe_client *pipe_hnd;
+ struct in_addr ip;
+
+ NTSTATUS result;
+ BOOL pass_must_change = False;
+
+ *err_str = '\0';
+
+ 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;
+ }
+
+ 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;
+ }
+
+ 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;
+ }
+
+ 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;
+ }
+
+ /* Given things like SMB signing, restrict anonymous and the like,
+ try an authenticated connection first */
+ if (!cli_session_setup(&cli, user_name, old_passwd, strlen(old_passwd)+1, old_passwd, strlen(old_passwd)+1, "")) {
+
+ result = cli_nt_error(&cli);
+
+ if (!NT_STATUS_IS_OK(result)) {
+
+ /* Password must change is the only valid error
+ * condition 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)) {
+ slprintf(err_str, err_str_len-1, "Could not "
+ "connect to machine %s: %s\n",
+ remote_machine, cli_errstr(&cli));
+ cli_shutdown(&cli);
+ return False;
+ }
+
+ 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.
+ */
+
+ 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;
+ }
+
+ cli_init_creds(&cli, "", "", NULL);
+ } else {
+ cli_init_creds(&cli, user_name, "", old_passwd);
+ }
+
+ 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;
+ }
+
+ /* 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)) {
+ 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;
+ }
+ } else {
+ slprintf(err_str, err_str_len-1,
+ "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 False;
+ }
+ }
+
+ if (NT_STATUS_IS_OK(result = rpccli_samr_chgpasswd_user(pipe_hnd, cli.mem_ctx, user_name,
+ new_passwd, old_passwd))) {
+ /* Great - it all worked! */
+ cli_shutdown(&cli);
+ return True;
+
+ } 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 ... */
+
+ slprintf(err_str, err_str_len-1, "machine %s rejected the password change: Error was : %s.\n",
+ remote_machine, get_friendly_nt_error_msg(result));
+ cli_shutdown(&cli);
+ return False;
+ }
+
+ /* OK, that failed, so try again... */
+ cli_rpc_pipe_close(pipe_hnd);
+
+ /* Try anonymous NTLMSSP... */
+ cli_init_creds(&cli, "", "", NULL);
+
+ 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,
+ cli.mem_ctx,
+ user_name,
+ new_passwd,
+ old_passwd)))) {
+ /* Great - it all worked! */
+ cli_shutdown(&cli);
+ return True;
+ } 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 */
+
+ slprintf(err_str, err_str_len-1,
+ "machine %s rejected the (anonymous) password change: Error was : %s.\n",
+ remote_machine, get_friendly_nt_error_msg(result));
+ cli_shutdown(&cli);
+ return False;
+ }
+
+ /* 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 True;
+ }
+ 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;
+ } else {
+ slprintf(err_str, err_str_len-1,
+ "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 False;
+ }
+ }
+}
projects / samba / blobdiff