1 /* $OpenBSD: auth2-none.c,v 1.20 2017/05/30 14:29:59 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 <sys/types.h> 27 #include <stdarg.h> 28 #include <stdio.h> 29 30 #include "xmalloc.h" 31 #include "sshkey.h" 32 #include "hostfile.h" 33 #include "auth.h" 34 #include "packet.h" 35 #include "log.h" 36 #include "buffer.h" 37 #include "misc.h" 38 #include "servconf.h" 39 #include "compat.h" 40 #include "ssh2.h" 41 #include "ssherr.h" 42 #ifdef GSSAPI 43 #include "ssh-gss.h" 44 #endif 45 #include "monitor_wrap.h" 46 47 /* import */ 48 extern ServerOptions options; 49 50 /* "none" is allowed only one time */ 51 static int none_enabled = 1; 52 53 static int 54 userauth_none(struct ssh *ssh) 55 { 56 int r; 57 58 none_enabled = 0; 59 if ((r = sshpkt_get_end(ssh)) != 0) 60 fatal("%s: %s", __func__, ssh_err(r)); 61 if (options.permit_empty_passwd && options.password_authentication) 62 return (PRIVSEP(auth_password(ssh->authctxt, ""))); 63 return (0); 64 } 65 66 Authmethod method_none = { 67 "none", 68 userauth_none, 69 &none_enabled 70 }; 71