Java Utililty Methods Hash Calculate

List of utility methods to do Hash Calculate

  1. HOME
  2. Java
  3. H
  4. Hash Calculate

Description

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

Method

char[]getHashChars(byte[] bytes)
get Hash Chars 
byte[] hash = getHash(bytes);
char chars[] = new char[32];
for (int i = 0; i < chars.length; i = i + 2) {
    byte b = hash[i / 2];
    chars[i] = HEX_CHARS[(b >>> 0x4) & 0xf];
    chars[i + 1] = HEX_CHARS[b & 0xf];
return chars;
...
StringgetHashedPassword(String plainPassword)
get Hashed Password 
String result = "";
MessageDigest md = null;
try {
    md = MessageDigest.getInstance("SHA-256");
} catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
md.update(plainPassword.getBytes());
...
StringgetHashFromString(String str)
Generates a sha-256 hash from a string Taken from http://stackoverflow.com/questions/415953/generate-md5-hash-in-java 
try {
    java.security.MessageDigest md = java.security.MessageDigest.getInstance("SHA-256");
    byte[] array = md.digest(str.getBytes("UTF-8"));
    StringBuilder sb = new StringBuilder();
    for (byte anArray : array) {
        sb.append(Integer.toHexString((anArray & 0xFF) | 0x100).substring(1, 3));
    return sb.toString();
...
MessageDigestgetHashInstance(final String alg)
get Hash Instance 
MessageDigest hash;
try {
    hash = MessageDigest.getInstance(alg);
} catch (NoSuchAlgorithmException ex) {
    throw new RuntimeException("As if " + alg + " isn't going to be implemented, bloody Java tossers");
return hash;
byte[]getHashKey(String input)
get Hash Key 
byte[] bytesOfMessage = null, digestMessage = null;
ByteBuffer buffer = ByteBuffer.allocate(16);
if (input == null) {
    buffer.putInt(0, 0);
    return buffer.array();
try {
    bytesOfMessage = input.getBytes("UTF-8");
...
StringgetHashMD5(File file)
Generates MD5 hash for a given file. 
MessageDigest md;
try {
    md = MessageDigest.getInstance("MD5");
    FileInputStream fis = new FileInputStream(file);
    byte[] dataBytes = new byte[1024];
    int nread = 0;
    while ((nread = fis.read(dataBytes)) != -1) {
        md.update(dataBytes, 0, nread);
...
StringgetHashMD5(String arg)
get Hash MD 
return generateMD5Hash(arg);
StringgetHashMD5(String str)
Calls getHash(str, "MD5") 
try {
    return getHash(str, "MD5");
} catch (NoSuchAlgorithmException e) {
    throw new RuntimeException(e);
StringgetHashMD5(String text)
Calculates the MD5 hash of the string. 
byte[] bytes = text.getBytes(StandardCharsets.ISO_8859_1);
return getHashMD5(bytes);
StringgetHashMDFive(String str)
get Hash MD Five 
try {
    byte[] strBytes = str.getBytes("UTF-8");
    MessageDigest md = MessageDigest.getInstance("MD5");
    byte[] hashByte = md.digest(strBytes);
    StringBuilder sb = new StringBuilder();
    for (byte aHashByte : hashByte) {
        sb.append(Integer.toString((aHashByte & 0xff) + 0x100, 16).substring(1));
    return sb.toString();
} catch (UnsupportedEncodingException | NoSuchAlgorithmException e) {
    throw new RuntimeException(e);