test/randtest.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <openssl/rand.h>
  13
  14 #include "../e_os.h"
  15
  16 /* some FIPS 140-1 random number test */
  17 /* some simple tests */
  18
  19 int main(int argc, char **argv)
  20 {
  21     unsigned char buf[2500];
  22     int i, j, k, s, sign, nsign, err = 0;
  23     unsigned long n1;
  24     unsigned long n2[16];
  25     unsigned long runs[2][34];
  26     /*
  27      * double d;
  28      */
  29     long d;
  30
  31     i = RAND_bytes(buf, 2500);
  32     if (i <= 0) {
  33         printf("init failed, the rand method is not properly installed\n");
  34         err++;
  35         goto err;
  36     }
  37
  38     n1 = 0;
  39     for (i = 0; i < 16; i++)
  40         n2[i] = 0;
  41     for (i = 0; i < 34; i++)
  42         runs[0][i] = runs[1][i] = 0;
  43
  44     /* test 1 and 2 */
  45     sign = 0;
  46     nsign = 0;
  47     for (i = 0; i < 2500; i++) {
  48         j = buf[i];
  49
  50         n2[j & 0x0f]++;
  51         n2[(j >> 4) & 0x0f]++;
  52
  53         for (k = 0; k < 8; k++) {
  54             s = (j & 0x01);
  55             if (s == sign)
  56                 nsign++;
  57             else {
  58                 if (nsign > 34)
  59                     nsign = 34;
  60                 if (nsign != 0) {
  61                     runs[sign][nsign - 1]++;
  62                     if (nsign > 6)
  63                         runs[sign][5]++;
  64                 }
  65                 sign = s;
  66                 nsign = 1;
  67             }
  68
  69             if (s)
  70                 n1++;
  71             j >>= 1;
  72         }
  73     }
  74     if (nsign > 34)
  75         nsign = 34;
  76     if (nsign != 0)
  77         runs[sign][nsign - 1]++;
  78
  79     /* test 1 */
  80     if (!((9654 < n1) && (n1 < 10346))) {
  81         printf("test 1 failed, X=%lu\n", n1);
  82         err++;
  83     }
  84     printf("test 1 done\n");
  85
  86     /* test 2 */
  87     d = 0;
  88     for (i = 0; i < 16; i++)
  89         d += n2[i] * n2[i];
  90     d = (d * 8) / 25 - 500000;
  91     if (!((103 < d) && (d < 5740))) {
  92         printf("test 2 failed, X=%ld.%02ld\n", d / 100L, d % 100L);
  93         err++;
  94     }
  95     printf("test 2 done\n");
  96
  97     /* test 3 */
  98     for (i = 0; i < 2; i++) {
  99         if (!((2267 < runs[i][0]) && (runs[i][0] < 2733))) {
 100             printf("test 3 failed, bit=%d run=%d num=%lu\n",
 101                    i, 1, runs[i][0]);
 102             err++;
 103         }
 104         if (!((1079 < runs[i][1]) && (runs[i][1] < 1421))) {
 105             printf("test 3 failed, bit=%d run=%d num=%lu\n",
 106                    i, 2, runs[i][1]);
 107             err++;
 108         }
 109         if (!((502 < runs[i][2]) && (runs[i][2] < 748))) {
 110             printf("test 3 failed, bit=%d run=%d num=%lu\n",
 111                    i, 3, runs[i][2]);
 112             err++;
 113         }
 114         if (!((223 < runs[i][3]) && (runs[i][3] < 402))) {
 115             printf("test 3 failed, bit=%d run=%d num=%lu\n",
 116                    i, 4, runs[i][3]);
 117             err++;
 118         }
 119         if (!((90 < runs[i][4]) && (runs[i][4] < 223))) {
 120             printf("test 3 failed, bit=%d run=%d num=%lu\n",
 121                    i, 5, runs[i][4]);
 122             err++;
 123         }
 124         if (!((90 < runs[i][5]) && (runs[i][5] < 223))) {
 125             printf("test 3 failed, bit=%d run=%d num=%lu\n",
 126                    i, 6, runs[i][5]);
 127             err++;
 128         }
 129     }
 130     printf("test 3 done\n");
 131
 132     /* test 4 */
 133     if (runs[0][33] != 0) {
 134         printf("test 4 failed, bit=%d run=%d num=%lu\n", 0, 34, runs[0][33]);
 135         err++;
 136     }
 137     if (runs[1][33] != 0) {
 138         printf("test 4 failed, bit=%d run=%d num=%lu\n", 1, 34, runs[1][33]);
 139         err++;
 140     }
 141     printf("test 4 done\n");
 142  err:
 143     err = ((err) ? 1 : 0);
 144     EXIT(err);
 145 }