Java Utililty Methods HMAC

List of utility methods to do HMAC

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Description

The list of methods to do HMAC are organized into topic(s).

Method

byte[]hmac(byte key[], byte text[])
Internal used. 
return hmac(key, text, 64);
Stringhmac(String hash, String data, String key)
hmac 
byte[] byteHMAC = null;
try {
    Mac mac = Mac.getInstance("Hmac" + hash);
    SecretKeySpec spec = new SecretKeySpec(key.getBytes(), "Hmac" + hash);
    mac.init(spec);
    byteHMAC = mac.doFinal(data.getBytes("UTF-8"));
} catch (InvalidKeyException e) {
    e.printStackTrace();
...
Stringhmac(String msg, String keyString)
hmac 
String digest = null;
try {
    SecretKeySpec key = new SecretKeySpec((keyString).getBytes("UTF-8"), "HmacMD5");
    Mac mac = Mac.getInstance("HmacMD5");
    mac.init(key);
    byte[] bytes = mac.doFinal(msg.getBytes("UTF-8"));
    StringBuffer hash = new StringBuffer();
    for (int i = 0; i < bytes.length; i++) {
...
StringHMAC(String username, BigInteger nonce, String hashedPassword)
This will Find HMAC and Append it to 
String hash = null;
StringBuilder sb = new StringBuilder(14);
sb.append(username).append(" ").append(nonce).append(" ").append(hashedPassword);
String appended = sb.toString();
try {
    hash = makeSHA512Hash(appended);
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
...
byte[]hmac_sha(String crypto, byte[] keyBytes, byte[] text)
This method uses the JCE to provide the crypto algorithm. 
try {
    Mac hmac;
    hmac = Mac.getInstance(crypto);
    SecretKeySpec macKey = new SecretKeySpec(keyBytes, "RAW");
    hmac.init(macKey);
    return hmac.doFinal(text);
} catch (GeneralSecurityException gse) {
    throw new UndeclaredThrowableException(gse);
...
byte[]hmac_sha(String crypto, byte[] keyBytes, byte[] text)
This method uses the JCE to provide the crypto algorithm. 
try {
    Mac hmac;
    hmac = Mac.getInstance(crypto);
    SecretKeySpec macKey = new SecretKeySpec(keyBytes, "RAW");
    hmac.init(macKey);
    return hmac.doFinal(text);
} catch (GeneralSecurityException gse) {
    throw new UndeclaredThrowableException(gse);
...
StringhmacDigest(String message, String secretKey, String algorithm)
hmac Digest 
String digest = null;
try {
    SecretKeySpec key = new SecretKeySpec(secretKey.getBytes(StandardCharsets.UTF_8), algorithm);
    Mac mac = Mac.getInstance(algorithm);
    mac.init(key);
    byte[] bytes = mac.doFinal(message.getBytes(StandardCharsets.US_ASCII));
    digest = toHex(bytes);
} catch (InvalidKeyException e) {
...
StringhmacEncode(String algorithm, String input, String privateKey)
hmac Encode 
try {
    byte[] keyBytes = privateKey.getBytes();
    Key key = new SecretKeySpec(keyBytes, 0, keyBytes.length, algorithm);
    Mac mac = Mac.getInstance(algorithm);
    mac.init(key);
    return byteArrayToHex(mac.doFinal(input.getBytes()));
} catch (NoSuchAlgorithmException ex) {
    throw new IllegalArgumentException("Unknown algorithm: " + algorithm);
...
StringhmacHex(String keyString, String message, String hmac)
hmac Hex 
try {
    SecretKey key = new SecretKeySpec(keyString.getBytes("UTF-8"), hmac);
    Mac mac = Mac.getInstance(key.getAlgorithm());
    mac.init(key);
    return encodeHex(mac.doFinal(message.getBytes("UTF-8")));
} catch (UnsupportedEncodingException | NoSuchAlgorithmException | InvalidKeyException e) {
    return "";
byte[]hmacSha(byte[] keyBytes, byte[] text)
hmac Sha 
try {
    Mac hmac;
    hmac = Mac.getInstance("HmacSHA1");
    SecretKeySpec macKey = new SecretKeySpec(keyBytes, "RAW");
    hmac.init(macKey);
    return hmac.doFinal(text);
} catch (GeneralSecurityException gse) {
    throw new UndeclaredThrowableException(gse);
...