/* $OpenBSD: auth2-passwd.c,v 1.22 2024/05/17 00:30:23 djm Exp $ */

/*

 * Copyright (c) 2000 Markus Friedl.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "includes.h"

#include <sys/types.h>

#include <stdlib.h>

#include <string.h>

#include <stdarg.h>

#include <stdio.h>

#include "packet.h"

#include "ssherr.h"

#include "log.h"

#include "sshkey.h"

#include "hostfile.h"

#include "auth.h"

#ifdef GSSAPI

#include "ssh-gss.h"

#endif

#include "monitor_wrap.h"

#include "misc.h"

#include "servconf.h"

/* import */

extern ServerOptions options;

extern struct authmethod_cfg methodcfg_passwd;

static int

userauth_passwd(struct ssh *ssh, const char *method)

{

  char *password = NULL;

  int authenticated = 0, r;

  u_char change;

  size_t len = 0;

  if ((r = sshpkt_get_u8(ssh, &change)) != 0 ||

      (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 ||

      (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) ||

      (r = sshpkt_get_end(ssh)) != 0) {

    freezero(password, len);

    fatal_fr(r, "parse packet");

  }

  if (change)

    logit("password change not supported");

  else if (mm_auth_password(ssh, password) == 1)

    authenticated = 1;

  freezero(password, len);

  return authenticated;

}

Authmethod method_passwd = {

  &methodcfg_passwd,

  userauth_passwd,

};