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

StringhmacSha(String crypto, String key, String value)
General hmac method - can pass in any crypto string recognised by Mac.getInstance . 
try {
    byte[] keyBytes = hexStr2Bytes(key);
    Mac hmac;
    hmac = Mac.getInstance(crypto);
    SecretKeySpec macKey = new SecretKeySpec(keyBytes, "RAW");
    hmac.init(macKey);
    return bytesToHex(hmac.doFinal(value.getBytes()));
} catch (GeneralSecurityException gse) {
...
byte[]hmacSha1(byte[] data, byte[] key)
Do HMAC-SHA1. 
SecretKey skey = new SecretKeySpec(key, "HmacSHA1");
Mac mac;
try {
    mac = Mac.getInstance("HmacSHA1");
    mac.init(skey);
} catch (GeneralSecurityException e) {
    throw new RuntimeException(e);
mac.update(data);
return mac.doFinal();
byte[]hmacSha1(byte[] key_bytes, byte[] text_bytes)
hmac Sha 
Mac hmacSha1;
try {
    hmacSha1 = Mac.getInstance("HmacSHA1");
} catch (NoSuchAlgorithmException nsae) {
    hmacSha1 = Mac.getInstance("HMAC-SHA-1");
SecretKeySpec macKey = new SecretKeySpec(key_bytes, "RAW");
hmacSha1.init(macKey);
...
byte[]hmacSha1(byte[] secret, byte[] data)
hmac Sha 
String algo = "HmacSHA1";
SecretKey secretKey = new SecretKeySpec(secret, algo);
Mac m = Mac.getInstance(algo);
m.init(secretKey);
return m.doFinal(data);
byte[]hmacSha1(SecretKey key, byte[] data)
hmac Sha 
Mac m = Mac.getInstance(HmacSHA1);
m.init(key);
m.update(data);
byte[] mac = m.doFinal();
return mac;
byte[]hmacSha1(SecretKeySpec signingKey, byte[]... data)
hmac Sha 
Mac mac = buildHmacSha1(signingKey);
return hmacSha1(mac, data);
StringhmacSha1(String data, String key)
hmac Sha 
SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "HmacSHA1");
Mac mac = null;
try {
    mac = Mac.getInstance("HmacSHA1");
    mac.init(signingKey);
} catch (NoSuchAlgorithmException | InvalidKeyException e) {
    throw new RuntimeException(e);
byte[] rawHmac = mac.doFinal(data.getBytes(StandardCharsets.UTF_8));
return Base64.getEncoder().encodeToString(rawHmac);
byte[]hmacSha1(String input, byte[] keyBytes)
Hmac sha1. 
try {
    SecretKey secretKey = new SecretKeySpec(keyBytes, HMACSHA1);
    Mac mac = Mac.getInstance(HMACSHA1);
    mac.init(secretKey);
    return mac.doFinal(input.getBytes());
} catch (GeneralSecurityException e) {
    throw new IllegalStateException("Security exception", e);
byte[]hmacSha1(String input, byte[] keyBytes)
hmac Sha 
try {
    SecretKey secretKey = new SecretKeySpec(keyBytes, HMACSHA1);
    Mac mac = Mac.getInstance(HMACSHA1);
    mac.init(secretKey);
    return mac.doFinal(input.getBytes());
} catch (GeneralSecurityException e) {
    throw convertRuntimeException(e);
byte[]hmacSHA256(byte[] secret, byte[] data)
hmac SHA 
Mac sha256HMAC = Mac.getInstance(HMAC_SHA_256);
SecretKeySpec secret_key = new SecretKeySpec(secret, HMAC_SHA_256);
sha256HMAC.init(secret_key);
return sha256HMAC.doFinal(data);