The Tor Browser: nsprpub/pr/tests/randseed.c@ca08bd8f51b2

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /*

     7 ** File: rngseed.c

     8 ** Description:

     9 ** Test NSPR's Random Number Seed generator

    10 **

    11 ** Initial test: Just make sure it outputs some data.

    12 **

    13 ** ... more? ... check some iterations to ensure it is random (no dupes)

    14 ** ... more? ... histogram distribution of random numbers

    15 */

    17 #include "plgetopt.h"

    18 #include "nspr.h"

    19 #include "prrng.h"

    20 #include <stdio.h>

    21 #include <stdlib.h>

    22 #include <string.h>

    24 /*

    25 ** Test harness infrastructure

    26 */

    27 PRLogModuleInfo *lm;

    28 PRLogModuleLevel msgLevel = PR_LOG_NONE;

    29 PRIntn  debug = 0;

    30 PRUint32  failed_already = 0;

    31 /* end Test harness infrastructure */

    33 PRIntn  optRandCount = 30;

    34 char    buf[40];

    35 PRSize  bufSize = sizeof(buf);

    36 PRSize  rSize;

    37 PRIntn  i;

    39 /*

    40 ** Emit help text for this test

    41 */

    42 static void Help( void )

    43 {

    44     printf("Template: Help(): display your help message(s) here");

    45     exit(1);

    46 } /* end Help() */

    48 static void PrintRand( void *buf, PRIntn size )

    49 {

    50     PRUint32 *rp = buf;

    51     PRIntn   i;

    53     printf("%4.4d--\n", size );

    54     while (size > 0 ) {

    55         switch( size )  {

    56             case 1 :

    57                 printf("%2.2X\n", *(rp++) );

    58                 size -= 4;

    59                 break;

    60             case 2 :

    61                 printf("%4.4X\n", *(rp++) );

    62                 size -= 4;

    63                 break;

    64             case 3 :

    65                 printf("%6.6X\n", *(rp++) );

    66                 size -= 4;

    67                 break;

    68             default:

    69                 while ( size >= 4) {

    70                     PRIntn i = 3;

    71                     do {

    72                         printf("%8.8X ", *(rp++) );

    73                         size -= 4;

    74                     } while( i-- );

    75                     i = 3;

    76                     printf("\n");

    77                 }

    78                 break;

    79         } /* end switch() */

    80     } /* end while() */

    81 } /* end PrintRand() */

    84 int main(int argc, char **argv)

    85 {

    86     {

    87         /*

    88         ** Get command line options

    89         */

    90         PLOptStatus os;

    91         PLOptState *opt = PL_CreateOptState(argc, argv, "hdv");

    93 	    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))

    94         {

    95 		    if (PL_OPT_BAD == os) continue;

    96             switch (opt->option)

    97             {

    98             case 'd':  /* debug */

    99                 debug = 1;

   100 			    msgLevel = PR_LOG_ERROR;

   101                 break;

   102             case 'v':  /* verbose mode */

   103 			    msgLevel = PR_LOG_DEBUG;

   104                 break;

   105             case 'h':  /* help message */

   106 			    Help();

   107                 break;

   108              default:

   109                 break;

   110             }

   111         }

   112 	    PL_DestroyOptState(opt);

   113     }

   115     lm = PR_NewLogModule("Test");       /* Initialize logging */

   116     for ( i = 0; i < optRandCount ; i++ ) {

   117         memset( buf, 0, bufSize );

   118         rSize = PR_GetRandomNoise( buf, bufSize );

   119         if (!rSize) {

   120             fprintf(stderr, "Not implemented\n" );

   121             failed_already = PR_TRUE;

   122             break;

   123         }

   124         if (debug) PrintRand( buf, rSize );

   125     }

   127     if (debug) printf("%s\n", (failed_already)? "FAIL" : "PASS");

   128     return( (failed_already == PR_TRUE )? 1 : 0 );

   129 }  /* main() */

   130 /* end template.c */

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