1 /* $OpenBSD: auth2-passwd.c,v 1.16 2018/07/09 21:35:50 markus 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 <string.h> 31 #include <stdarg.h> 32 33 #include "packet.h" 34 #include "ssherr.h" 35 #include "log.h" 36 #include "sshkey.h" 37 #include "hostfile.h" 38 #include "auth.h" 39 #ifdef GSSAPI 40 #include "ssh-gss.h" 41 #endif 42 #include "monitor_wrap.h" 43 #include "misc.h" 44 #include "servconf.h" 45 46 /* import */ 47 extern ServerOptions options; 48 49 static int 50 userauth_passwd(struct ssh *ssh) 51 { 52 char *password; 53 int authenticated = 0, r; 54 u_char change; 55 size_t len; 56 57 if ((r = sshpkt_get_u8(ssh, &change)) != 0 || 58 (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 || 59 (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) || 60 (r = sshpkt_get_end(ssh)) != 0) 61 fatal("%s: %s", __func__, ssh_err(r)); 62 63 if (change) 64 logit("password change not supported"); 65 else if (PRIVSEP(auth_password(ssh, password)) == 1) 66 authenticated = 1; 67 explicit_bzero(password, len); 68 free(password); 69 return authenticated; 70 } 71 72 Authmethod method_passwd = { 73 "password", 74 userauth_passwd, 75 &options.password_authentication 76 }; 77