Java Utililty Methods SHA256

List of utility methods to do SHA256

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Description

The list of methods to do SHA256 are organized into topic(s).

Method

Stringsha256(String string, String secret)
sha 
try {
    SecretKeySpec signingKey = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
    final Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(signingKey);
    byte[] digest = mac.doFinal(string.getBytes("UTF-8"));
    digest = mac.doFinal(string.getBytes());
    BigInteger bigInteger = new BigInteger(1, digest);
    return String.format("%0" + (digest.length << 1) + "x", bigInteger);
...
Stringsha256(String strSrc)
sha 
return Encrypt(strSrc, "SHA-256");
StringSHA256(String text)
SHA 
MessageDigest md;
md = MessageDigest.getInstance("SHA-256");
md.update(text.getBytes("iso-8859-1"), 0, text.length());
byte[] sha256hash = md.digest();
return convertToHex(sha256hash);
byte[]SHA256(String text)
SHA 
try {
    MessageDigest md;
    md = MessageDigest.getInstance("SHA-256");
    md.update(text.getBytes("UTF-8"), 0, text.length());
    return md.digest();
} catch (NoSuchAlgorithmException e) {
    throw new RuntimeException(e);
} catch (UnsupportedEncodingException e) {
...
Stringsha256(String text)
sha 
MessageDigest md = MessageDigest.getInstance("SHA-256");
return toHex(md.digest(text.getBytes()));
StringSHA256(String texto)
SHA 
String sen = "";
MessageDigest md = null;
try {
    md = MessageDigest.getInstance("SHA-256");
    BigInteger hash = new BigInteger(1, md.digest(texto.getBytes()));
    sen = hash.toString(16);
} catch (NullPointerException e) {
    e.printStackTrace();
...
StringSHA256Binary(String toHash)
This SHA256 function returns a 256-character binary String representing the full SHA256 hash of the String toHash This binary String is useful when signing a message with a Lamport Signature. 
try {
    byte[] messageHash = md.digest(toHash.getBytes("UTF-8"));
    return new BigInteger(1, messageHash).toString(2);
} catch (Exception e) {
    e.printStackTrace();
return null;
byte[]SHA256byte(String input)
SH Abyte 
try {
    MessageDigest md = MessageDigest.getInstance(ALGORITHM_SHA256);
    return md.digest(input.getBytes());
} catch (NoSuchAlgorithmException e) {
    throw new RuntimeException(e);
byte[]sha256digest(@Nonnull byte[] data)
Simple utility to calculate the SHA-256 digest. 
MessageDigest digest;
try {
    digest = MessageDigest.getInstance("SHA-256");
} catch (NoSuchAlgorithmException e) {
    throw new Error(e);
return digest.digest(data);
byte[]sha256Digest(byte[] bytes)
sha Digest 
return digest(SHA256_ALGORITHM_NAME, bytes);