/*	$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) */