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      1 
      2 #define TEST_NAME "secretbox8"
      3 #include "cmptest.h"
      4 
      5 static unsigned char k[crypto_secretbox_KEYBYTES];
      6 static unsigned char n[crypto_secretbox_NONCEBYTES];
      7 static unsigned char m[10000];
      8 static unsigned char c[10000];
      9 static unsigned char m2[10000];
     10 
     11 int
     12 main(void)
     13 {
     14     size_t mlen;
     15     size_t i;
     16     int    caught;
     17 
     18     for (mlen = 0; mlen < 1000 && mlen + crypto_secretbox_ZEROBYTES < sizeof m;
     19          ++mlen) {
     20         crypto_secretbox_keygen(k);
     21         randombytes_buf(n, crypto_secretbox_NONCEBYTES);
     22         randombytes_buf(m + crypto_secretbox_ZEROBYTES, mlen);
     23         crypto_secretbox(c, m, mlen + crypto_secretbox_ZEROBYTES, n, k);
     24         caught = 0;
     25         while (caught < 10) {
     26             c[rand() % (mlen + crypto_secretbox_ZEROBYTES)] = rand();
     27             if (crypto_secretbox_open(m2, c, mlen + crypto_secretbox_ZEROBYTES,
     28                                       n, k) == 0) {
     29                 for (i = 0; i < mlen + crypto_secretbox_ZEROBYTES; ++i) {
     30                     if (m2[i] != m[i]) {
     31                         printf("forgery\n");
     32                         return 100;
     33                     }
     34                 }
     35             } else {
     36                 ++caught;
     37             }
     38         }
     39     }
     40     return 0;
     41 }
     42