/*
  Copyright (C) 1997-2023 Free Software Foundation, Inc.

  This file is part of GNU Inetutils.

  GNU Inetutils is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or (at
  your option) any later version.

  GNU Inetutils is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see `http://www.gnu.org/licenses/'. */

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 */

/*
 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
 * of Technology.
 *
 * For copying and distribution information, please see the file
 * <mit-copyright.h>.
 *
 * This routine prints the supplied string to standard
 * output as a prompt, and reads a password string without
 * echoing.
 */

#include <config.h>

#if defined RSA_ENCPWD || defined KRB4_ENCPWD

# include <stdio.h>
# include <sys/ioctl.h>
# include <setjmp.h>

static jmp_buf env;

/*** Routines ****************************************************** */
/*
 * This version just returns the string, doesn't map to key.
 *
 * Returns 0 on success, non-zero on failure.
 */

int
local_des_read_pw_string (s, max, prompt, verify)
     char *s;
     int max;
     char *prompt;
     int verify;
{
  int ok = 0;
  char *ptr;

  jmp_buf old_env;
  struct sgttyb tty_state;
  char key_string[BUFSIZ];

  if (max > BUFSIZ)
    {
      return -1;
    }

  /* XXX assume jmp_buf is typedef'ed to an array */
  memmove ((char *) env, (char *) old_env, sizeof (env));
  if (setjmp (env))
    goto lose;

  /* save terminal state */
  if (ioctl (0, TIOCGETP, (char *) &tty_state) == -1)
    return -1;
/*
    push_signals();
*/
  /* Turn off echo */
  tty_state.sg_flags &= ~ECHO;
  if (ioctl (0, TIOCSETP, (char *) &tty_state) == -1)
    return -1;
  while (!ok)
    {
      printf ("%s", prompt);
      fflush (stdout);
      while (!fgets (s, max, stdin));

      if ((ptr = strchr (s, '\n')))
	*ptr = '\0';
      if (verify)
	{
	  printf ("\nVerifying, please re-enter %s", prompt);
	  fflush (stdout);
	  if (!fgets (key_string, sizeof (key_string), stdin))
	    {
	      clearerr (stdin);
	      continue;
	    }
	  if ((ptr = strchr (key_string, '\n')))
	    *ptr = '\0';
	  if (strcmp (s, key_string))
	    {
	      printf ("\n\07\07Mismatch - try again\n");
	      fflush (stdout);
	      continue;
	    }
	}
      ok = 1;
    }

lose:
  if (!ok)
    memset (s, 0, max);
  printf ("\n");
  /* turn echo back on */
  tty_state.sg_flags |= ECHO;
  if (ioctl (0, TIOCSETP, (char *) &tty_state))
    ok = 0;
/*
    pop_signals();
*/
  memmove ((char *) old_env, (char *) env, sizeof (env));
  if (verify)
    memset (key_string, 0, sizeof (key_string));
  s[max - 1] = 0;		/* force termination */
  return !ok;			/* return nonzero if not okay */
}
#endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
