/* 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 in_addr ip; struct ntuser_creds creds; NTSTATUS result; *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, "")) { /* * We should connect as the anonymous user here, in case * the server has "must change password" checked... * Thanks to 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; } init_creds(&creds, "", "", NULL); cli_init_creds(&cli, &creds); } else { init_creds(&creds, user_name, "", old_passwd); cli_init_creds(&cli, &creds); } 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 to easily */ cli.pipe_auth_flags = AUTH_PIPE_NTLMSSP; cli.pipe_auth_flags |= AUTH_PIPE_SIGN; cli.pipe_auth_flags |= AUTH_PIPE_SEAL; if ( !cli_nt_session_open( &cli, PI_SAMR ) ) { if (lp_client_lanman_auth()) { 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, "machine %s does not support SAMR connections, but LANMAN password changed are disabled\n", remote_machine); cli_shutdown(&cli); return False; } } if (NT_STATUS_IS_OK(result = cli_samr_chgpasswd_user(&cli, 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_nt_session_close(&cli); /* Try anonymous NTLMSSP... */ init_creds(&creds, "", "", NULL); cli_init_creds(&cli, &creds); result = NT_STATUS_UNSUCCESSFUL; /* OK, this is ugly, but... */ if ( cli_nt_session_open( &cli, PI_SAMR ) && NT_STATUS_IS_OK(result = cli_samr_chgpasswd_user(&cli, 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()) { 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, "machine %s does not support SAMR connections, but LANMAN password changed are disabled\n", remote_machine); cli_shutdown(&cli); return False; } } }