/**
* 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;
}
/**
* Creates and returns a {@link Digest} instance corresponding to the given algorithm.
*
* @param algorithm the digest algorithm.
* @return the created {@link Digest} instance.
* @throws NullPointerException if {@code algorithm} is {@code null}.
* @throws IllegalArgumentException if the given algorithm is unknown.
*/
static Digest newDigest(Algorithm<Digest> algorithm) {
Parameters.checkNotNull(algorithm);
Digest digest;
if (algorithm == Algorithm.MD2) {
digest = Digests.md2();
} else if (algorithm == Algorithm.MD4) {
digest = Digests.md4();
} else if (algorithm == Algorithm.MD5) {
digest = Digests.md5();
} else if (algorithm == Algorithm.SHA1) {
digest = Digests.sha1();
} else if (algorithm == Algorithm.SHA256) {
digest = Digests.sha256();
} else if (algorithm == Algorithm.SHA512) {
digest = Digests.sha512();
} else if (algorithm == Algorithm.KECCAK224) {
digest = Digests.keccak224();
} else if (algorithm == Algorithm.KECCAK256) {
digest = Digests.keccak256();
} else if (algorithm == Algorithm.KECCAK384) {
digest = Digests.keccak384();
} else if (algorithm == Algorithm.KECCAK512) {
digest = Digests.keccak512();
} else {
throw new IllegalArgumentException("Unknown algorithm");
}
return digest;
}
/**
* Creates a new {@code StringReader}.
*
* @param strings the input {@link String}s.
* @throws NullPointerException if {@code strings} is {@code null} or if it contains a {@code
* null} reference.
*/
public StringReader(Iterable<String> strings) {
this.in = new StringBuilder();
for (String str : strings) {
Parameters.checkNotNull(str);
this.in.append(str);
}
this.in.trimToSize();
}
