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[]hmacSha256(String keyHex, String stringData)
hmac Sha 
byte[] keyBytes = hex_to_bytes(keyHex);
byte[] data = string_to_bytes(stringData);
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(keyBytes, "HmacSHA256");
sha256_HMAC.init(secret_key);
return sha256_HMAC.doFinal(data);
Stringhmacsha256Representation(String data, String pusherApplicationSecret)
Returns a HMAC/SHA256 representation of the given string 
try {
    final SecretKeySpec signingKey = new SecretKeySpec(pusherApplicationSecret.getBytes(), "HmacSHA256");
    final Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(signingKey);
    byte[] digest = mac.doFinal(data.getBytes("UTF-8"));
    digest = mac.doFinal(data.getBytes());
    BigInteger bigInteger = new BigInteger(1, digest);
    return String.format("%0" + (digest.length << 1) + "x", bigInteger);
...
byte[]hmacSha512(byte[] key, byte[] message)
hmac Sha 
Mac mac = Mac.getInstance(HMAC_SHA512);
mac.init(new SecretKeySpec(key, HMAC_SHA512));
return mac.doFinal(message);
StringhmacSign(String aValue, String aKey)
hmac Sign 
byte k_ipad[] = new byte[64];
byte k_opad[] = new byte[64];
byte keyb[];
byte value[];
try {
    keyb = aKey.getBytes("UTF-8");
    value = aValue.getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
...
StringhmacSign(String skey, String data)
hmac Sign 
SecretKeySpec key = new SecretKeySpec(skey.getBytes(), "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(key);
byte[] raw = mac.doFinal(data.getBytes());
return bytesToHex(raw);