1/* $OpenBSD: auth2-none.c,v 1.16 2010/06/25 08:46:17 djm 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#include <sys/stat.h> 30#include <sys/uio.h> 31 32#include <fcntl.h> 33#include <stdarg.h> 34#include <string.h> 35#include <unistd.h> 36 37#include "atomicio.h" 38#include "xmalloc.h" 39#include "key.h" 40#include "hostfile.h" 41#include "auth.h" 42#include "packet.h" 43#include "log.h" 44#include "buffer.h" 45#include "servconf.h" 46#include "compat.h" 47#include "ssh2.h" 48#ifdef GSSAPI 49#include "ssh-gss.h" 50#endif 51#include "monitor_wrap.h" 52 53/* import */ 54extern ServerOptions options; 55 56/* "none" is allowed only one time */ 57static int none_enabled = 1; 58 59static int 60userauth_none(Authctxt *authctxt) 61{ 62 none_enabled = 0; 63 packet_check_eom(); 64 if (options.permit_empty_passwd && options.password_authentication) 65 return (PRIVSEP(auth_password(authctxt, ""))); 66 return (0); 67} 68 69Authmethod method_none = { 70 "none", 71 userauth_none, 72 &none_enabled 73}; 74