As near as I can tell, LibTomCrypt doesn't provide any way to tell
which cipher failed when it reports a cipher test failure. For
example, I was getting:
Algorithm failed test vectors. (5)
cipher_hash_test.c:14:cipher_descriptor[x].test()
But there's no way to tell what value x has, and even if there was, it
would take a bit of digging to determine which algorithm that
corresponds to. So, I added a variant of the DO() macro, DOX(), which
takes an additional string argument which is displayed on failure. So
now I get:
Algorithm failed test vectors. (5) - camellia
cipher_hash_test.c:14:cipher_descriptor[x].test()
cecbbb88fc