crypto/external/bsd/openssh/dist/auth2-passwd.c

   1 /*      $NetBSD$        */
   2 /* $OpenBSD: auth2-passwd.c,v 1.9 2006/08/03 03:34:41 deraadt 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-passwd.c,v 1.5 2006/09/28 21:22:14 christos Exp $");
  29 #include <sys/types.h>
  30
  31 #include <string.h>
  32 #include <stdarg.h>
  33
  34 #include "xmalloc.h"
  35 #include "packet.h"
  36 #include "log.h"
  37 #include "key.h"
  38 #include "hostfile.h"
  39 #include "auth.h"
  40 #include "buffer.h"
  41 #ifdef GSSAPI
  42 #include "ssh-gss.h"
  43 #endif
  44 #include "monitor_wrap.h"
  45 #include "servconf.h"
  46
  47 /* import */
  48 extern ServerOptions options;
  49
  50 static int
  51 userauth_passwd(Authctxt *authctxt)
  52 {
  53         char *password, *newpass;
  54         int authenticated = 0;
  55         int change;
  56         u_int len, newlen;
  57
  58         change = packet_get_char();
  59         password = packet_get_string(&len);
  60         if (change) {
  61                 /* discard new password from packet */
  62                 newpass = packet_get_string(&newlen);
  63                 memset(newpass, 0, newlen);
  64                 xfree(newpass);
  65         }
  66         packet_check_eom();
  67
  68         if (change)
  69                 logit("password change not supported");
  70         else if (PRIVSEP(auth_password(authctxt, password)) == 1)
  71                 authenticated = 1;
  72         memset(password, 0, len);
  73         xfree(password);
  74         return authenticated;
  75 }
  76
  77 Authmethod method_passwd = {
  78         "password",
  79         userauth_passwd,
  80         &options.password_authentication
  81 };