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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)authenc.c        8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/crypto/telnet/telnet/authenc.c,v 1.2.8.2 2002/04/13 10:59:08 markm Exp $
  35  * $DragonFly: src/crypto/telnet/telnet/authenc.c,v 1.2 2003/06/17 04:24:37 dillon Exp $
  36  */
  37
  38 #ifdef  AUTHENTICATION
  39 #ifdef  ENCRYPTION
  40 #include <sys/types.h>
  41 #include <arpa/telnet.h>
  42 #include <pwd.h>
  43 #include <unistd.h>
  44 #include <libtelnet/encrypt.h>
  45 #include <libtelnet/misc.h>
  46
  47 #include "general.h"
  48 #include "ring.h"
  49 #include "externs.h"
  50 #include "defines.h"
  51 #include "types.h"
  52
  53 int
  54 net_write(unsigned char *str, int len)
  55 {
  56         if (NETROOM() > len) {
  57                 ring_supply_data(&netoring, str, len);
  58                 if (str[0] == IAC && str[1] == SE)
  59                         printsub('>', &str[2], len-2);
  60                 return(len);
  61         }
  62         return(0);
  63 }
  64
  65 void
  66 net_encrypt(void)
  67 {
  68 #ifdef  ENCRYPTION
  69         if (encrypt_output)
  70                 ring_encrypt(&netoring, encrypt_output);
  71         else
  72                 ring_clearto(&netoring);
  73 #endif  /* ENCRYPTION */
  74 }
  75
  76 int
  77 telnet_spin(void)
  78 {
  79         return(-1);
  80 }
  81
  82 char *
  83 telnet_getenv(char *val)
  84 {
  85         return((char *)env_getvalue((unsigned char *)val));
  86 }
  87
  88 char *
  89 telnet_gets(const char *prom, char *result, int length, int echo)
  90 {
  91         extern int globalmode;
  92         int om = globalmode;
  93         char *res;
  94
  95         TerminalNewMode(-1);
  96         if (echo) {
  97                 printf("%s", prom);
  98                 res = fgets(result, length, stdin);
  99         } else if ((res = getpass(prom))) {
 100                 strncpy(result, res, length);
 101                 res = result;
 102         }
 103         TerminalNewMode(om);
 104         return(res);
 105 }
 106 #endif  /* ENCRYPTION */
 107 #endif  /* AUTHENTICATION */