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      1 /*	$NetBSD: authenc.c,v 1.14 2018/12/14 23:40:17 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)authenc.c	8.1 (Berkeley) 6/6/93";
     36 #else
     37 __RCSID("$NetBSD: authenc.c,v 1.14 2018/12/14 23:40:17 christos Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #if	defined(AUTHENTICATION) || defined(ENCRYPTION)
     42 #include <unistd.h>
     43 #include <sys/types.h>
     44 #include <arpa/telnet.h>
     45 #include <libtelnet/encrypt.h>
     46 #include <libtelnet/misc.h>
     47 
     48 #include "general.h"
     49 #include "ring.h"
     50 #include "externs.h"
     51 #include "defines.h"
     52 #include "types.h"
     53 
     54 int
     55 telnet_net_write(unsigned char *str, int len)
     56 {
     57 	if (NETROOM() <= len)
     58 		return 0;
     59 	ring_supply_data(&netoring, str, len);
     60 	if (str[0] == IAC && str[1] == SE) {
     61 		if (len < 2)
     62 			return 0;
     63 		printsub('>', &str[2], len - 2);
     64 	}
     65 	return len;
     66 }
     67 
     68 void
     69 net_encrypt(void)
     70 {
     71 #ifdef	ENCRYPTION
     72 	if (encrypt_output)
     73 		ring_encrypt(&netoring, encrypt_output);
     74 	else
     75 		ring_clearto(&netoring);
     76 #endif	/* ENCRYPTION */
     77 }
     78 
     79 int
     80 telnet_spin(void)
     81 {
     82 	return -1;
     83 }
     84 
     85 char *
     86 telnet_getenv(char *val)
     87 {
     88 	return env_getvalue(val);
     89 }
     90 
     91 char *
     92 telnet_gets(char *prmpt, char *result, int length, int echo)
     93 {
     94 	extern int globalmode;
     95 	int om = globalmode;
     96 	char *res;
     97 
     98 	if (length < 0)
     99 		abort();
    100 
    101 	TerminalNewMode(-1);
    102 	if (echo) {
    103 		printf("%s", prmpt);
    104 		res = fgets(result, length, stdin);
    105 	} else if ((res = getpass(prmpt)) != NULL) {
    106 		strlcpy(result, res, (size_t)length);
    107 		res = result;
    108 	}
    109 	TerminalNewMode(om);
    110 	return res;
    111 }
    112 #endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */
    113