crypto/external/bsd/heimdal/dist/lib/hcrypto/test_rand.c

   1 /*      $NetBSD: test_rand.c,v 1.1.1.2 2014/04/24 12:45:30 pettai Exp $ */
   2
   3 /*
   4  * Copyright (c) 2007 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * 3. Neither the name of the Institute nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 #include <config.h>
  39
  40 #include <stdio.h>
  41
  42 #include <krb5/roken.h>
  43 #include <krb5/getarg.h>
  44
  45 #include "rand.h"
  46
  47
  48 /*
  49  *
  50  */
  51
  52 static int version_flag;
  53 static int help_flag;
  54 static int len = 1024 * 1024;
  55 static char *rand_method;
  56 static char *filename;
  57
  58 static struct getargs args[] = {
  59     { "length", 0,      arg_integer,    &len,
  60       "length", NULL },
  61     { "file",   0,      arg_string,     &filename,
  62       "file name", NULL },
  63     { "method", 0,      arg_string,     &rand_method,
  64       "method", NULL },
  65     { "version",        0,      arg_flag,       &version_flag,
  66       "print version", NULL },
  67     { "help",           0,      arg_flag,       &help_flag,
  68       NULL,     NULL }
  69 };
  70
  71 /*
  72  *
  73  */
  74
  75 /*
  76  *
  77  */
  78
  79 static void
  80 usage (int ret)
  81 {
  82     arg_printusage (args,
  83                     sizeof(args)/sizeof(args[0]),
  84                     NULL,
  85                     "");
  86     exit (ret);
  87 }
  88
  89 int
  90 main(int argc, char **argv)
  91 {
  92     int idx = 0;
  93     char *buffer;
  94     char path[MAXPATHLEN];
  95
  96     setprogname(argv[0]);
  97
  98     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &idx))
  99         usage(1);
 100
 101     if (help_flag)
 102         usage(0);
 103
 104     if(version_flag){
 105         print_version(NULL);
 106         exit(0);
 107     }
 108
 109     argc -= idx;
 110     argv += idx;
 111
 112     if (argc != 0)
 113         usage(1);
 114
 115     buffer = emalloc(len);
 116
 117     if (rand_method) {
 118         if (0) {
 119         }
 120 #ifndef NO_RAND_FORTUNA_METHOD
 121         else if (strcasecmp(rand_method, "fortuna") == 0)
 122             RAND_set_rand_method(RAND_fortuna_method());
 123 #endif
 124 #ifndef NO_RAND_UNIX_METHOD
 125         else if (strcasecmp(rand_method, "unix") == 0)
 126             RAND_set_rand_method(RAND_unix_method());
 127 #endif
 128 #ifndef NO_RAND_EGD_METHOD
 129         else if (strcasecmp(rand_method, "egd") == 0)
 130             RAND_set_rand_method(RAND_egd_method());
 131 #endif
 132 #ifdef WIN32
 133         else if (strcasecmp(rand_method, "w32crypto") == 0)
 134             RAND_set_rand_method(RAND_w32crypto_method());
 135 #endif
 136         else
 137             errx(1, "unknown method %s", rand_method);
 138     }
 139
 140     if (RAND_file_name(path, sizeof(path)) == NULL)
 141         errx(1, "RAND_file_name failed");
 142
 143     if (RAND_status() != 1)
 144         errx(1, "random not ready yet");
 145
 146     if (RAND_bytes(buffer, len) != 1)
 147         errx(1, "RAND_bytes");
 148
 149     if (filename)
 150         rk_dumpdata(filename, buffer, len);
 151
 152     /* head vs tail */
 153     if (len >= 100000) {
 154         int bit, i;
 155         double res;
 156         int bits[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 157
 158         for (i = 0; i < len; i++) {
 159             unsigned char c = ((unsigned char *)buffer)[i];
 160             for (bit = 0; bit < 8 && c; bit++) {
 161                 if (c & 1)
 162                     bits[bit]++;
 163                 c = c >> 1;
 164             }
 165         }
 166
 167         for (bit = 0; bit < 8; bit++) {
 168
 169             res = ((double)abs(len - bits[bit] * 2)) / (double)len;
 170             if (res > 0.005)
 171                 errx(1, "head%d vs tail%d > 0.5%%%% %lf == %d vs %d",
 172                      bit, bit, res, len, bits[bit]);
 173
 174             printf("head vs tails bit%d: %lf\n", bit, res);
 175         }
 176     }
 177
 178     free(buffer);
 179
 180     /* test write random file */
 181     {
 182         static const char *file = "test.file";
 183         if (RAND_write_file(file) != 1)
 184             errx(1, "RAND_write_file");
 185         if (RAND_load_file(file, 1024) != 1)
 186             errx(1, "RAND_load_file");
 187         unlink(file);
 188     }
 189
 190     return 0;
 191 }