release/src/router/dnscrypt/src/libnacl/tests/auth6.cpp

   1 #include <string>
   2 using std::string;
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include "crypto_auth_hmacsha512256.h"
   6 #include "randombytes.h"
   7
   8 main()
   9 {
  10   int clen;
  11   int i;
  12   for (clen = 0;clen < 10000;++clen) {
  13     unsigned char key_bytes[32];
  14     randombytes(key_bytes,sizeof key_bytes);
  15     string key((char *) key_bytes,sizeof key_bytes);
  16     unsigned char c_bytes[clen];
  17     randombytes(c_bytes,sizeof c_bytes);
  18     string c((char *) c_bytes,sizeof c_bytes);
  19     string a = crypto_auth_hmacsha512256(c,key);
  20     try {
  21       crypto_auth_hmacsha512256_verify(a,c,key);
  22     } catch(const char *s) {
  23       printf("fail %d %s\n",clen,s);
  24       return 100;
  25     }
  26     if (clen > 0) {
  27       size_t pos = random() % clen;
  28       c.replace(pos,1,1,c[pos] + 1 + (random() % 255));
  29       try {
  30         crypto_auth_hmacsha512256_verify(a,c,key);
  31         printf("forgery %d\n",clen);
  32       } catch(const char *s) {
  33         ;
  34       }
  35       pos = random() % a.size();
  36       a.replace(pos,1,1,a[pos] + 1 + (random() % 255));
  37       try {
  38         crypto_auth_hmacsha512256_verify(a,c,key);
  39         printf("forgery %d\n",clen);
  40       } catch(const char *s) {
  41         ;
  42       }
  43     }
  44   }
  45   return 0;
  46 }