usr.bin/telnet/authenc.c

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)authenc.c        8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/crypto/telnet/telnet/authenc.c,v 1.2.8.2 2002/04/13 10:59:08 markm Exp $
  31  * $DragonFly: src/crypto/telnet/telnet/authenc.c,v 1.2 2003/06/17 04:24:37 dillon Exp $
  32  */
  33
  34 #ifdef  AUTHENTICATION
  35 #ifdef  ENCRYPTION
  36 #include <sys/types.h>
  37 #include <arpa/telnet.h>
  38 #include <pwd.h>
  39 #include <unistd.h>
  40 #include <libtelnet/encrypt.h>
  41 #include <libtelnet/misc.h>
  42
  43 #include "general.h"
  44 #include "ring.h"
  45 #include "externs.h"
  46 #include "defines.h"
  47 #include "types.h"
  48
  49 int
  50 net_write(unsigned char *str, int len)
  51 {
  52         if (NETROOM() > len) {
  53                 ring_supply_data(&netoring, str, len);
  54                 if (str[0] == IAC && str[1] == SE)
  55                         printsub('>', &str[2], len-2);
  56                 return(len);
  57         }
  58         return(0);
  59 }
  60
  61 void
  62 net_encrypt(void)
  63 {
  64 #ifdef  ENCRYPTION
  65         if (encrypt_output)
  66                 ring_encrypt(&netoring, encrypt_output);
  67         else
  68                 ring_clearto(&netoring);
  69 #endif  /* ENCRYPTION */
  70 }
  71
  72 int
  73 telnet_spin(void)
  74 {
  75         return(-1);
  76 }
  77
  78 char *
  79 telnet_getenv(char *val)
  80 {
  81         return((char *)env_getvalue((unsigned char *)val));
  82 }
  83
  84 char *
  85 telnet_gets(const char *prom, char *result, int length, int echo)
  86 {
  87         extern int globalmode;
  88         int om = globalmode;
  89         char *res;
  90
  91         TerminalNewMode(-1);
  92         if (echo) {
  93                 printf("%s", prom);
  94                 res = fgets(result, length, stdin);
  95         } else if ((res = getpass(prom))) {
  96                 strncpy(result, res, length);
  97                 res = result;
  98         }
  99         TerminalNewMode(om);
 100         return(res);
 101 }
 102 #endif  /* ENCRYPTION */
 103 #endif  /* AUTHENTICATION */