#define TEST_NAME "auth7" #include "cmptest.h" static unsigned char key[32]; static unsigned char c[600]; static unsigned char a[64]; int main(void) { size_t clen; for (clen = 0; clen < sizeof c; ++clen) { crypto_auth_keygen(key); randombytes_buf(c, clen); crypto_auth_hmacsha512(a, c, clen, key); if (crypto_auth_hmacsha512_verify(a, c, clen, key) != 0) { printf("fail %u\n", (unsigned int) clen); return 100; } if (clen > 0) { c[(size_t) rand() % clen] += 1 + (rand() % 255); if (crypto_auth_hmacsha512_verify(a, c, clen, key) == 0) { printf("forgery %u\n", (unsigned int) clen); return 100; } a[rand() % sizeof a] += 1 + (rand() % 255); if (crypto_auth_hmacsha512_verify(a, c, clen, key) == 0) { printf("forgery %u\n", (unsigned int) clen); return 100; } } } return 0; }