usr.bin/telnet/authenc.c

   1 /*      $NetBSD: authenc.c,v 1.13 2012/01/09 16:08:55 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 1.13 2012/01/09 16:08:55 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                 ring_supply_data(&netoring, str, len);
  59                 if (str[0] == IAC && str[1] == SE)
  60                         printsub('>', &str[2], len-2);
  61                 return(len);
  62         }
  63         return(0);
  64 }
  65
  66 void
  67 net_encrypt(void)
  68 {
  69 #ifdef  ENCRYPTION
  70         if (encrypt_output)
  71                 ring_encrypt(&netoring, encrypt_output);
  72         else
  73                 ring_clearto(&netoring);
  74 #endif  /* ENCRYPTION */
  75 }
  76
  77 int
  78 telnet_spin(void)
  79 {
  80         return(-1);
  81 }
  82
  83 char *
  84 telnet_getenv(char *val)
  85 {
  86         return((char *)env_getvalue((unsigned char *)val));
  87 }
  88
  89 char *
  90 telnet_gets(char *prmpt, char *result, int length, int echo)
  91 {
  92         extern int globalmode;
  93         int om = globalmode;
  94         char *res;
  95
  96         TerminalNewMode(-1);
  97         if (echo) {
  98                 printf("%s", prmpt);
  99                 res = fgets(result, length, stdin);
 100         } else if ((res = getpass(prmpt)) != NULL) {
 101                 strlcpy(result, res, length);
 102                 res = result;
 103         }
 104         TerminalNewMode(om);
 105         return(res);
 106 }
 107 #endif  /* defined(AUTHENTICATION) || defined(ENCRYPTION) */