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 #pragma ident   "%Z%%M% %I%     %E% SMI"
   7
   8 /*
   9  * Miscellaneous routines needed by the telnet client for authentication
  10  * and / or encryption.
  11  */
  12
  13 /*
  14  * Copyright (c) 1991, 1993
  15  *      The Regents of the University of California.  All rights reserved.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions
  19  * are met:
  20  * 1. Redistributions of source code must retain the above copyright
  21  *    notice, this list of conditions and the following disclaimer.
  22  * 2. Redistributions in binary form must reproduce the above copyright
  23  *    notice, this list of conditions and the following disclaimer in the
  24  *    documentation and/or other materials provided with the distribution.
  25  * 3. All advertising materials mentioning features or use of this software
  26  *    must display the following acknowledgement:
  27  *      This product includes software developed by the University of
  28  *      California, Berkeley and its contributors.
  29  * 4. Neither the name of the University nor the names of its contributors
  30  *    may be used to endorse or promote products derived from this software
  31  *    without specific prior written permission.
  32  *
  33  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  34  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  36  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  37  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  38  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  39  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  41  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  42  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  43  * SUCH DAMAGE.
  44  */
  45
  46 #ifndef lint
  47 static char sccsid[] = "@(#)authenc.c   8.1 (Berkeley) 6/6/93";
  48 #endif /* not lint */
  49
  50 #include <sys/types.h>
  51 #include <arpa/telnet.h>
  52
  53 #include "general.h"
  54 #include "ring.h"
  55 #include "externs.h"
  56 #include "defines.h"
  57 #include "types.h"
  58
  59 char *RemoteHostName = NULL;
  60 char *UserNameRequested = NULL;
  61
  62 #define MAXNETDATA      16
  63
  64 /*
  65  * Get ready to do authentication and encryption by calling their
  66  * init routines, and clearing the user name variable
  67  */
  68 /* ARGSUSED */
  69 void
  70 auth_encrypt_init(char *local, char *remote, char *name)
  71 {
  72         RemoteHostName = remote;
  73
  74         auth_init(name);
  75
  76         encrypt_init(name);
  77
  78         if (UserNameRequested) {
  79                 free(UserNameRequested);
  80                 UserNameRequested = NULL;
  81         }
  82 }
  83
  84 /*
  85  * Set the user name variable.  This is the user name used from now
  86  * on for authentication and encryption
  87  */
  88 void
  89 auth_encrypt_user(char *name)
  90 {
  91         if (UserNameRequested)
  92                 free(UserNameRequested);
  93         UserNameRequested = name ? strdup(name) : NULL;
  94 }
  95
  96 int
  97 net_write(unsigned char *str, int len)
  98 {
  99         if (NETROOM() > len) {
 100                 ring_supply_data(&netoring, str, len);
 101                 if (str[0] == IAC && str[1] == SE)
 102                         printsub('>', &str[2], len - 2);
 103                 return (len);
 104         }
 105         return (0);
 106 }
 107
 108 void
 109 net_encrypt(void)
 110 {
 111         if (encrypt_output)
 112                 ring_encrypt(&netoring, encrypt_output);
 113         else
 114                 ring_clearto(&netoring);
 115 }
 116
 117 /*
 118  * Spin to wait for authentication to complete
 119  * This allows for a timeout
 120  */
 121 void
 122 telnet_spin(void)
 123 {
 124         extern boolean_t scheduler_lockout_tty;
 125
 126         scheduler_lockout_tty = B_TRUE;
 127         (void) Scheduler(0);
 128         scheduler_lockout_tty = B_FALSE;
 129 }
 130
 131
 132 /*
 133  * Used to print out unsigned chars as decimals for debugging options
 134  */
 135 void
 136 printd(unsigned char *data, int cnt)
 137 {
 138         cnt = (cnt < MAXNETDATA) ? cnt:MAXNETDATA;
 139         while (cnt-- > 0)
 140                 (void) printf(" %02x", *data++);
 141 }