static void test_eax(void)
{
uint8_t cipher[2], tag[16];
/*
* MSG: F7FB
* KEY: 91945D3F4DCBEE0BF45EF52255F095A4
* NONCE: BECAF043B0A23D843194BA972C66DEBD
* HEADER: FA3BFD4806EB53FA
* CIPHER: 19DD5C4C9331049D0BDAB0277408F67967E5
*/
const void *key = "\x91\x94\x5d\x3f\x4d\xcb\xee\x0b\xf4\x5e\xf5\x22\x55\xf0\x95\xa4";
const void *nonce = "\xbe\xca\xf0\x43\xb0\xa2\x3d\x84\x31\x94\xba\x97\x2c\x66\xde\xbd";
size_t nnonce = 16;
const void *header = "\xfa\x3b\xfd\x48\x06\xeb\x53\xfa";
size_t nheader = 8;
const void *msg = "\xf7\xfb";
size_t nmsg = 2;
cf_aes_context aes;
cf_aes_init(&aes, key, 16);
cf_eax_encrypt(&cf_aes, &aes,
msg, nmsg,
header, nheader,
nonce, nnonce,
cipher,
tag, sizeof tag);
TEST_CHECK(memcmp("\x19\xdd", cipher, 2) == 0);
TEST_CHECK(memcmp("\x5c\x4c\x93\x31\x04\x9d\x0b\xda\xb0\x27\x74\x08\xf6\x79\x67\xe5", tag, sizeof tag) == 0);
int rc;
uint8_t tmp[2];
rc = cf_eax_decrypt(&cf_aes, &aes,
cipher, sizeof cipher,
header, nheader,
nonce, nnonce,
tag, sizeof tag,
tmp);
TEST_CHECK(rc == 0);
TEST_CHECK(memcmp(tmp, msg, nmsg) == 0);
tag[0] ^= 0xff;
rc = cf_eax_decrypt(&cf_aes, &aes,
cipher, sizeof cipher,
header, nheader,
nonce, nnonce,
tag, sizeof tag,
tmp);
TEST_CHECK(rc == 1);
}
static void check_eax(const void *key, size_t nkey,
const void *msg, size_t nmsg,
const void *nonce, size_t nnonce,
const void *header, size_t nheader,
const void *expect_cipher,
const void *expect_tag, size_t ntag)
{
uint8_t cipher[32];
uint8_t tag[16];
assert(nmsg <= sizeof cipher);
assert(ntag <= ntag);
cf_aes_context aes;
cf_aes_init(&aes, key, nkey);
cf_eax_encrypt(&cf_aes, &aes,
msg, nmsg,
header, nheader,
nonce, nnonce,
cipher,
tag, ntag);
TEST_CHECK(memcmp(expect_cipher, cipher, nmsg) == 0);
TEST_CHECK(memcmp(expect_tag, tag, ntag) == 0);
int rc;
uint8_t tmp[sizeof cipher];
rc = cf_eax_decrypt(&cf_aes, &aes,
cipher, nmsg,
header, nheader,
nonce, nnonce,
tag, ntag,
tmp);
TEST_CHECK(rc == 0);
TEST_CHECK(memcmp(tmp, msg, nmsg) == 0);
tag[0] ^= 0xff;
rc = cf_eax_decrypt(&cf_aes, &aes,
cipher, nmsg,
header, nheader,
nonce, nnonce,
tag, ntag,
tmp);
TEST_CHECK(rc == 1);
}