git.ozlabs.org Git - ccan/blob - ccan/crypto/shachain/test/run-badhash.c

   1 #include <ccan/crypto/shachain/shachain.h>
   2 /* Include the C files directly. */
   3 #include <ccan/crypto/shachain/shachain.c>
   4 #include <ccan/tap/tap.h>
   5
   6 #define NUM_TESTS 1000
   7
   8 int main(void)
   9 {
  10         struct sha256 seed;
  11         struct shachain chain;
  12         uint64_t i;
  13
  14         plan_tests(NUM_TESTS);
  15
  16         memset(&seed, 0xFF, sizeof(seed));
  17         shachain_init(&chain);
  18
  19         for (i = 0xFFFFFFFFFFFFFFFFULL;
  20              i > 0xFFFFFFFFFFFFFFFFULL - NUM_TESTS;
  21              i--) {
  22                 struct sha256 expect;
  23
  24                 shachain_from_seed(&seed, i, &expect);
  25                 /* Screw it up. */
  26                 expect.u.u8[0]++;
  27
  28                 /* Either it should fail, or it couldn't derive any others (ie. pos 0). */
  29                 if (shachain_add_hash(&chain, i, &expect)) {
  30                         ok1(chain.known[0].index == i);
  31                         /* Fix it up in-place */
  32                         chain.known[0].hash.u.u8[0]--;
  33                 } else {
  34                         expect.u.u8[0]--;
  35                         ok1(shachain_add_hash(&chain, i, &expect));
  36                 }
  37         }
  38         return exit_status();
  39 }