crypto/openssh-4/auth2-passwd.c

   1 /*
   2  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include "includes.h"
  26 RCSID("$OpenBSD: auth2-passwd.c,v 1.5 2003/12/31 00:24:50 dtucker Exp $");
  27
  28 #include "xmalloc.h"
  29 #include "packet.h"
  30 #include "log.h"
  31 #include "auth.h"
  32 #include "monitor_wrap.h"
  33 #include "servconf.h"
  34
  35 /* import */
  36 extern ServerOptions options;
  37
  38 static int
  39 userauth_passwd(Authctxt *authctxt)
  40 {
  41         char *password, *newpass;
  42         int authenticated = 0;
  43         int change;
  44         u_int len, newlen;
  45
  46         change = packet_get_char();
  47         password = packet_get_string(&len);
  48         if (change) {
  49                 /* discard new password from packet */
  50                 newpass = packet_get_string(&newlen);
  51                 memset(newpass, 0, newlen);
  52                 xfree(newpass);
  53         }
  54         packet_check_eom();
  55
  56         if (change)
  57                 logit("password change not supported");
  58         else if (PRIVSEP(auth_password(authctxt, password)) == 1)
  59                 authenticated = 1;
  60 #ifdef HAVE_CYGWIN
  61         if (check_nt_auth(1, authctxt->pw) == 0)
  62                 authenticated = 0;
  63 #endif
  64         memset(password, 0, len);
  65         xfree(password);
  66         return authenticated;
  67 }
  68
  69 Authmethod method_passwd = {
  70         "password",
  71         userauth_passwd,
  72         &options.password_authentication
  73 };