1 /* $NetBSD: auth2-none.c,v 1.9 2018/04/06 18:58:59 christos Exp $ */ 2 /* $OpenBSD: auth2-none.c,v 1.21 2018/03/03 03:15:51 djm Exp $ */ 3 /* 4 * Copyright (c) 2000 Markus Friedl. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "includes.h" 28 __RCSID("$NetBSD: auth2-none.c,v 1.9 2018/04/06 18:58:59 christos Exp $"); 29 #include <sys/types.h> 30 #include <stdarg.h> 31 #include <stdio.h> 32 33 #include "xmalloc.h" 34 #include "sshkey.h" 35 #include "hostfile.h" 36 #include "auth.h" 37 #include "packet.h" 38 #include "log.h" 39 #include "buffer.h" 40 #include "misc.h" 41 #include "servconf.h" 42 #include "compat.h" 43 #include "ssh2.h" 44 #include "ssherr.h" 45 #ifdef GSSAPI 46 #include "ssh-gss.h" 47 #endif 48 #include "monitor_wrap.h" 49 50 /* import */ 51 extern ServerOptions options; 52 53 /* "none" is allowed only one time */ 54 static int none_enabled = 1; 55 56 static int 57 userauth_none(struct ssh *ssh) 58 { 59 int r; 60 61 none_enabled = 0; 62 if ((r = sshpkt_get_end(ssh)) != 0) 63 fatal("%s: %s", __func__, ssh_err(r)); 64 if (options.permit_empty_passwd && options.password_authentication) 65 return (PRIVSEP(auth_password(ssh, ""))); 66 return (0); 67 } 68 69 Authmethod method_none = { 70 "none", 71 userauth_none, 72 &none_enabled 73 }; 74