1/* $NetBSD: auth2-passwd.c,v 1.16 2022/10/05 22:39:36 christos Exp $ */ 2/* $OpenBSD: auth2-passwd.c,v 1.21 2022/05/27 04:29:40 dtucker Exp $ */ 3 4/* 5 * Copyright (c) 2000 Markus Friedl. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "includes.h" 29__RCSID("$NetBSD: auth2-passwd.c,v 1.16 2022/10/05 22:39:36 christos Exp $"); 30#include <sys/types.h> 31 32#include <stdlib.h> 33#include <string.h> 34#include <stdarg.h> 35#include <stdio.h> 36 37#include "packet.h" 38#include "ssherr.h" 39#include "log.h" 40#include "sshkey.h" 41#include "hostfile.h" 42#include "auth.h" 43#ifdef GSSAPI 44#include "ssh-gss.h" 45#endif 46#include "monitor_wrap.h" 47#include "misc.h" 48#include "servconf.h" 49 50/* import */ 51extern ServerOptions options; 52 53static int 54userauth_passwd(struct ssh *ssh, const char *method) 55{ 56 char *password = NULL; 57 int authenticated = 0, r; 58 u_char change; 59 size_t len = 0; 60 61 if ((r = sshpkt_get_u8(ssh, &change)) != 0 || 62 (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 || 63 (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) || 64 (r = sshpkt_get_end(ssh)) != 0) { 65 freezero(password, len); 66 fatal_fr(r, "parse packet"); 67 } 68 69 if (change) 70 logit("password change not supported"); 71 else if (PRIVSEP(auth_password(ssh, password)) == 1) 72 authenticated = 1; 73 freezero(password, len); 74 return authenticated; 75} 76 77Authmethod method_passwd = { 78 "password", 79 NULL, 80 userauth_passwd, 81 &options.password_authentication 82}; 83