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