/**
* Creates and returns a {@link MAC} instance corresponding to the given algorithm, initialized
* with the provided secret key.
*
* @param algorithm the MAC algorithm.
* @param key the secret key.
* @return the created {@link MAC} instance.
* @throws NullPointerException if {@code algorithm} is {@code null}.
* @throws IllegalArgumentException if the given algorithm is unknown.
*/
static MAC newMAC(Algorithm<MAC> algorithm, byte[] key) {
Parameters.checkNotNull(algorithm);
MAC mac;
if (algorithm == Algorithm.HMAC_MD2) {
mac = HMAC.md2(key);
} else if (algorithm == Algorithm.HMAC_MD4) {
mac = HMAC.md4(key);
} else if (algorithm == Algorithm.HMAC_MD5) {
mac = HMAC.md5(key);
} else if (algorithm == Algorithm.HMAC_SHA1) {
mac = HMAC.sha1(key);
} else if (algorithm == Algorithm.HMAC_SHA256) {
mac = HMAC.sha256(key);
} else if (algorithm == Algorithm.HMAC_SHA512) {
mac = HMAC.sha512(key);
} else if (algorithm == Algorithm.HMAC_KECCAK224) {
mac = HMAC.keccak224(key);
} else if (algorithm == Algorithm.HMAC_KECCAK256) {
mac = HMAC.keccak256(key);
} else if (algorithm == Algorithm.HMAC_KECCAK384) {
mac = HMAC.keccak384(key);
} else if (algorithm == Algorithm.HMAC_KECCAK512) {
mac = HMAC.keccak512(key);
} else {
throw new IllegalArgumentException("Unknown algorithm");
}
return mac;
}
@Test
public void testSHA512() {
MAC hmac = HMAC.sha512(ascii(EMPTY_STRING));
assertArrayEquals(
hex(
"b936cee86c9f87aa5d3c6f2e84cb5a4239a5fe50480a6ec66b"
+ "70ab5b1f4ac6730c6c515421b327ec1d69402e53dfb4"
+ "9ad7381eb067b338fd7b0cb22247225d47"),
hmac.digest(ascii(EMPTY_STRING)));
hmac = HMAC.sha512(ascii("key"));
assertArrayEquals(
hex(
"b42af09057bac1e2d41708e48a902e09b5ff7f12ab428a4fe8"
+ "6653c73dd248fb82f948a549f7b791a5b41915ee4d1e"
+ "c3935357e4e2317250d0372afa2ebeeb3a"),
hmac.digest(ascii(PANGRAM)));
}
