diff options
Diffstat (limited to 'source/libsmb/passchange.c')
| -rw-r--r-- | source/libsmb/passchange.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/source/libsmb/passchange.c b/source/libsmb/passchange.c new file mode 100644 index 00000000000..dc0cbbcb7cc --- /dev/null +++ b/source/libsmb/passchange.c @@ -0,0 +1,152 @@ +/* + 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 <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; + } + + 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))) { + + if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) + || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) { + /* try the old Lanman method */ + 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; + } + } else { + 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; + } + } + cli_shutdown(&cli); + return True; +} |