/*      $NetBSD: authenc.c,v 1.14 2018/12/14 23:40:17 christos Exp $    */

/*-
* Copyright (c) 1991, 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.
*/

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)authenc.c   8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: authenc.c,v 1.14 2018/12/14 23:40:17 christos Exp $");
#endif
#endif /* not lint */

#if     defined(AUTHENTICATION) || defined(ENCRYPTION)
#include <unistd.h>
#include <sys/types.h>
#include <arpa/telnet.h>
#include <libtelnet/encrypt.h>
#include <libtelnet/misc.h>

#include "general.h"
#include "ring.h"
#include "externs.h"
#include "defines.h"
#include "types.h"

int
telnet_net_write(unsigned char *str, int len)
{
       if (NETROOM() <= len)
               return 0;
       ring_supply_data(&netoring, str, len);
       if (str[0] == IAC && str[1] == SE) {
               if (len < 2)
                       return 0;
               printsub('>', &str[2], len - 2);
       }
       return len;
}

void
net_encrypt(void)
{
#ifdef  ENCRYPTION
       if (encrypt_output)
               ring_encrypt(&netoring, encrypt_output);
       else
               ring_clearto(&netoring);
#endif  /* ENCRYPTION */
}

int
telnet_spin(void)
{
       return -1;
}

char *
telnet_getenv(char *val)
{
       return env_getvalue(val);
}

char *
telnet_gets(char *prmpt, char *result, int length, int echo)
{
       extern int globalmode;
       int om = globalmode;
       char *res;

       if (length < 0)
               abort();

       TerminalNewMode(-1);
       if (echo) {
               printf("%s", prmpt);
               res = fgets(result, length, stdin);
       } else if ((res = getpass(prmpt)) != NULL) {
               strlcpy(result, res, (size_t)length);
               res = result;
       }
       TerminalNewMode(om);
       return res;
}
#endif  /* defined(AUTHENTICATION) || defined(ENCRYPTION) */