usr/src/cmd/cmd-inet/usr.bin/telnet/authenc.c

   1 /*
   2  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*
   7  * Miscellaneous routines needed by the telnet client for authentication
   8  * and / or encryption.
   9  */
  10
  11 /*
  12  * Copyright (c) 1991, 1993
  13  *      The Regents of the University of California.  All rights reserved.
  14  *
  15  * Redistribution and use in source and binary forms, with or without
  16  * modification, are permitted provided that the following conditions
  17  * are met:
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  * 3. All advertising materials mentioning features or use of this software
  24  *    must display the following acknowledgement:
  25  *      This product includes software developed by the University of
  26  *      California, Berkeley and its contributors.
  27  * 4. Neither the name of the University nor the names of its contributors
  28  *    may be used to endorse or promote products derived from this software
  29  *    without specific prior written permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  34  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  35  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  39  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  40  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  41  * SUCH DAMAGE.
  42  */
  43
  44 static char sccsid[] = "@(#)authenc.c   8.1 (Berkeley) 6/6/93";
  45
  46 #include <sys/types.h>
  47 #include <arpa/telnet.h>
  48
  49 #include "general.h"
  50 #include "ring.h"
  51 #include "externs.h"
  52 #include "defines.h"
  53 #include "types.h"
  54
  55 char *RemoteHostName = NULL;
  56 char *UserNameRequested = NULL;
  57
  58 #define MAXNETDATA      16
  59
  60 /*
  61  * Get ready to do authentication and encryption by calling their
  62  * init routines, and clearing the user name variable
  63  */
  64 /* ARGSUSED */
  65 void
  66 auth_encrypt_init(char *local, char *remote, char *name)
  67 {
  68         RemoteHostName = remote;
  69
  70         auth_init(name);
  71
  72         encrypt_init(name);
  73
  74         if (UserNameRequested) {
  75                 free(UserNameRequested);
  76                 UserNameRequested = NULL;
  77         }
  78 }
  79
  80 /*
  81  * Set the user name variable.  This is the user name used from now
  82  * on for authentication and encryption
  83  */
  84 void
  85 auth_encrypt_user(char *name)
  86 {
  87         free(UserNameRequested);
  88         UserNameRequested = name ? strdup(name) : NULL;
  89 }
  90
  91 int
  92 net_write(unsigned char *str, int len)
  93 {
  94         if (NETROOM() > len) {
  95                 ring_supply_data(&netoring, str, len);
  96                 if (str[0] == IAC && str[1] == SE)
  97                         printsub('>', &str[2], len - 2);
  98                 return (len);
  99         }
 100         return (0);
 101 }
 102
 103 void
 104 net_encrypt(void)
 105 {
 106         if (encrypt_output)
 107                 ring_encrypt(&netoring, encrypt_output);
 108         else
 109                 ring_clearto(&netoring);
 110 }
 111
 112 /*
 113  * Spin to wait for authentication to complete
 114  * This allows for a timeout
 115  */
 116 void
 117 telnet_spin(void)
 118 {
 119         extern boolean_t scheduler_lockout_tty;
 120
 121         scheduler_lockout_tty = B_TRUE;
 122         (void) Scheduler(0);
 123         scheduler_lockout_tty = B_FALSE;
 124 }
 125
 126
 127 /*
 128  * Used to print out unsigned chars as decimals for debugging options
 129  */
 130 void
 131 printd(unsigned char *data, int cnt)
 132 {
 133         cnt = (cnt < MAXNETDATA) ? cnt:MAXNETDATA;
 134         while (cnt-- > 0)
 135                 (void) printf(" %02x", *data++);
 136 }