release/src/router/dnscrypt/src/libnacl/crypto_verify/try.c

   1 /*
   2  * crypto_verify/try.c version 20090118
   3  * D. J. Bernstein
   4  * Public domain.
   5  */
   6
   7 #include <stdlib.h>
   8 #include "crypto_verify.h"
   9 #include "windows/windows-quirks.h"
  10
  11 extern unsigned char *alignedcalloc(unsigned long long);
  12
  13 const char *primitiveimplementation = crypto_verify_IMPLEMENTATION;
  14
  15 static unsigned char *x;
  16 static unsigned char *y;
  17
  18 void preallocate(void)
  19 {
  20 }
  21
  22 void allocate(void)
  23 {
  24   x = alignedcalloc(crypto_verify_BYTES);
  25   y = alignedcalloc(crypto_verify_BYTES);
  26 }
  27
  28 void predoit(void)
  29 {
  30 }
  31
  32 void doit(void)
  33 {
  34   crypto_verify(x,y);
  35 }
  36
  37 static const char *check(void)
  38 {
  39   int r = crypto_verify(x,y);
  40   if (r == 0) {
  41     if (memcmp(x,y,crypto_verify_BYTES)) return "different strings pass verify";
  42   } else if (r == -1) {
  43     if (!memcmp(x,y,crypto_verify_BYTES)) return "equal strings fail verify";
  44   } else {
  45     return "weird return value from verify";
  46   }
  47   return 0;
  48 }
  49
  50 char checksum[2];
  51
  52 const char *checksum_compute(void)
  53 {
  54   long long tests;
  55   long long i;
  56   long long j;
  57   const char *c;
  58
  59   for (tests = 0;tests < 100000;++tests) {
  60     for (i = 0;i < crypto_verify_BYTES;++i) x[i] = random();
  61     for (i = 0;i < crypto_verify_BYTES;++i) y[i] = random();
  62     c = check(); if (c) return c;
  63     for (i = 0;i < crypto_verify_BYTES;++i) y[i] = x[i];
  64     c = check(); if (c) return c;
  65     y[random() % crypto_verify_BYTES] = random();
  66     c = check(); if (c) return c;
  67     y[random() % crypto_verify_BYTES] = random();
  68     c = check(); if (c) return c;
  69     y[random() % crypto_verify_BYTES] = random();
  70     c = check(); if (c) return c;
  71   }
  72
  73   checksum[0] = '0';
  74   checksum[1] = 0;
  75   return 0;
  76 }