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  */
  32
  33 #ifdef  AUTHENTICATION
  34 #ifdef  ENCRYPTION
  35 #include <sys/types.h>
  36 #include <arpa/telnet.h>
  37 #include <pwd.h>
  38 #include <unistd.h>
  39 #include <libtelnet/encrypt.h>
  40 #include <libtelnet/misc.h>
  41
  42 #include "general.h"
  43 #include "ring.h"
  44 #include "externs.h"
  45 #include "defines.h"
  46 #include "types.h"
  47
  48 int
  49 net_write(unsigned char *str, int len)
  50 {
  51         if (NETROOM() > len) {
  52                 ring_supply_data(&netoring, str, len);
  53                 if (str[0] == IAC && str[1] == SE)
  54                         printsub('>', &str[2], len-2);
  55                 return(len);
  56         }
  57         return(0);
  58 }
  59
  60 void
  61 net_encrypt(void)
  62 {
  63 #ifdef  ENCRYPTION
  64         if (encrypt_output)
  65                 ring_encrypt(&netoring, encrypt_output);
  66         else
  67                 ring_clearto(&netoring);
  68 #endif  /* ENCRYPTION */
  69 }
  70
  71 int
  72 telnet_spin(void)
  73 {
  74         return(-1);
  75 }
  76
  77 char *
  78 telnet_getenv(char *val)
  79 {
  80         return((char *)env_getvalue((unsigned char *)val));
  81 }
  82
  83 char *
  84 telnet_gets(const char *prom, char *result, int length, int echo)
  85 {
  86         extern int globalmode;
  87         int om = globalmode;
  88         char *res;
  89
  90         TerminalNewMode(-1);
  91         if (echo) {
  92                 printf("%s", prom);
  93                 res = fgets(result, length, stdin);
  94         } else if ((res = getpass(prom))) {
  95                 strncpy(result, res, length);
  96                 res = result;
  97         }
  98         TerminalNewMode(om);
  99         return(res);
 100 }
 101 #endif  /* ENCRYPTION */
 102 #endif  /* AUTHENTICATION */