/* 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. *************************************************************/ NTSTATUS 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 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 NT_STATUS_UNSUCCESSFUL; } 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 NT_STATUS_UNSUCCESSFUL; } 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) ); result = cli_nt_error(&cli); cli_shutdown(&cli); return result; } /* 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 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. */ 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) ); result = cli_nt_error(&cli); cli_shutdown(&cli); return result; } 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) ); 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)) { slprintf(err_str, err_str_len-1, "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 { 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); result = cli_nt_error(&cli); cli_shutdown(&cli); return result; } } 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 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 ... */ 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 result; } /* 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 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 */ 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 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; } slprintf(err_str, err_str_len-1, "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 { 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 NT_STATUS_UNSUCCESSFUL; } } }