Java Utililty Methods Digest

List of utility methods to do Digest

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Description

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

Method

Stringdigest(String token)
digest 
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
return byteArrayToHexStr(sha1.digest(token.getBytes("UTF-8")));
byte[]digest(String type, byte[] bytes)
digest 
try {
    MessageDigest dist = MessageDigest.getInstance(type);
    return dist.digest(bytes);
} catch (NoSuchAlgorithmException e) {
    throw new IllegalArgumentException("Cannot find digest:" + type, e);
Stringdigest(String uri)
digest 
try {
    MessageDigest algorithm = MessageDigest.getInstance("MD5");
    algorithm.update(uri.getBytes());
    byte messageDigest[] = algorithm.digest();
    StringBuffer hexString = new StringBuffer();
    for (int i = 0; i < messageDigest.length; i++) {
        hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
    return "_" + hexString.toString();
} catch (NoSuchAlgorithmException nsae) {
return uri.replaceAll("\\/|:|\\.|#|\\?|&|\\+|-|~", "_");
byte[]digest(String value, byte[] salt, int iterations)
digest 
MessageDigest digest = MessageDigest.getInstance(digestAlgorithm);
digest.reset();
digest.update(salt);
byte[] byteValue = digest.digest(value.getBytes(stringEncoding));
for (int i = 0; i < iterations; ++i) {
    digest.reset();
    byteValue = digest.digest(byteValue);
return byteValue;
byte[]digest(String value, String algorithm)
digest 
if (value == null || "".equals(value.trim())) {
    return null;
byte[] bytes = null;
try {
    MessageDigest md = MessageDigest.getInstance(algorithm);
    bytes = md.digest(value.getBytes(CHARSET));
} catch (NoSuchAlgorithmException e) {
...
UUIDdigestBased(String text)
Method used when an UUID must be generated using a string representation. 
assert text != null;
final MessageDigest algo = MessageDigest.getInstance("MD5");
algo.reset();
algo.update(text.getBytes());
final byte[] digest = algo.digest();
assert digest.length == DIGEST_LEN;
long mostSigBits = 0L;
long leastSigBits = 0L;
...
byte[]digestBySHA256(byte[] source)
digest 
MessageDigest md5Digest = getDigest(DIGEST_SHA_256);
return md5Digest.digest(source);
byte[]digestBytes(String type, byte[]... data)
digests all byte arrays via the method provided 
MessageDigest md = MessageDigest.getInstance(type);
for (int i = 0; i < data.length; i++) {
    md.update(data[i]);
return md.digest();
StringdigestEncrypte(byte[] plainText, String algorithm)
digest Encrypte 
MessageDigest md = MessageDigest.getInstance(algorithm);
md.update(plainText);
byte[] b = md.digest();
StringBuilder output = new StringBuilder(32);
for (int i = 0; i < b.length; i++) {
    String temp = Integer.toHexString(b[i] & 0xff);
    if (temp.length() < 2) {
        output.append("0");
...
StringdigestHex(String txt)
Compute a MD5 hash from the text, represented as a hexadecimal string. 
return b2hex(digest(null, txt));