The Tor Browser: netwerk/srtp/src/crypto/test/rand

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * rand_gen.c

     3  *

     4  * a random source (random number generator)

     5  *

     6  * David A. McGrew

     7  * Cisco Systems, Inc.

     8  */

     9 /*

    10  *

    11  * Copyright(c) 2001-2006 Cisco Systems, Inc.

    12  * All rights reserved.

    13  *

    14  * Redistribution and use in source and binary forms, with or without

    15  * modification, are permitted provided that the following conditions

    16  * are met:

    17  *

    18  *   Redistributions of source code must retain the above copyright

    19  *   notice, this list of conditions and the following disclaimer.

    20  *

    21  *   Redistributions in binary form must reproduce the above

    22  *   copyright notice, this list of conditions and the following

    23  *   disclaimer in the documentation and/or other materials provided

    24  *   with the distribution.

    25  *

    26  *   Neither the name of the Cisco Systems, Inc. nor the names of its

    27  *   contributors may be used to endorse or promote products derived

    28  *   from this software without specific prior written permission.

    29  *

    30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    31  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    32  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

    33  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

    34  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

    35  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    36  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    37  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

    39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    40  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

    41  * OF THE POSSIBILITY OF SUCH DAMAGE.

    42  *

    43  */

    46 #include <stdio.h>           /* for printf() */

    47 #include <unistd.h>          /* for getopt() */

    48 #include "crypto_kernel.h"

    50 /*

    51  * MAX_PRINT_STRING_LEN is defined in datatypes.h, and is the length

    52  * of the largest hexadecimal string that can be generated by the

    53  * function octet_string_hex_string().

    54  */

    56 #define BUF_LEN (MAX_PRINT_STRING_LEN/2)

    58 void

    59 usage(char *prog_name) {

    60   printf("usage: %s -n <num_bytes> [-l][ -d debug_module ]*\n"

    61 	 "   -n <num>   output <num> random bytes, where <num>"

    62 	 " is between zero and %d\n"

    63 	 "   -l         list the avaliable debug modules\n"

    64 	 "   -d <mod>   turn on debugging module <mod>\n",

    65 	 prog_name, BUF_LEN);

    66   exit(255);

    67 }

    69 int

    70 main (int argc, char *argv[]) {

    71   extern char *optarg;

    72   int q;

    73   int num_octets = 0;

    74   unsigned do_list_mods = 0;

    75   err_status_t status;

    77   if (argc == 1)

    78     usage(argv[0]);

    80   /* initialize kernel - we need to do this before anything else */

    81   status = crypto_kernel_init();

    82   if (status) {

    83     printf("error: crypto_kernel init failed\n");

    84     exit(1);

    85   }

    87   /* process input arguments */

    88   while (1) {

    89     q = getopt(argc, argv, "ld:n:");

    90     if (q == -1)

    91       break;

    92     switch (q) {

    93     case 'd':

    94       status = crypto_kernel_set_debug_module(optarg, 1);

    95       if (status) {

    96 	printf("error: set debug module (%s) failed\n", optarg);

    97 	exit(1);

    98       }

    99       break;

   100     case 'l':

   101       do_list_mods = 1;

   102       break;

   103     case 'n':

   104       num_octets = atoi(optarg);

   105       if (num_octets < 0 || num_octets > BUF_LEN)

   106 	usage(argv[0]);

   107       break;

   108     default:

   109       usage(argv[0]);

   110     }

   111   }

   113   if (do_list_mods) {

   114     status = crypto_kernel_list_debug_modules();

   115     if (status) {

   116       printf("error: list of debug modules failed\n");

   117       exit(1);

   118     }

   119   }

   121   if (num_octets > 0) {

   122     uint8_t buffer[BUF_LEN];

   124     status = crypto_get_random(buffer, num_octets);

   125     if (status) {

   126       printf("error: failure in random source\n");

   127     } else {

   128       printf("%s\n", octet_string_hex_string(buffer, num_octets));

   129     }

   130   }

   132   status = crypto_kernel_shutdown();

   133   if (status) {

   134     printf("error: crypto_kernel shutdown failed\n");

   135     exit(1);

   136   }

   138   return 0;

   139 }

The Tor Browser / file revision