public final class Hash

Streaming and one-shot cryptographic hash (message digest) functions. The supported algorithms are exposed as constants on this class:

• MD5 – 128 bit, legacy interop only (broken collision resistance)
• SHA1 – 160 bit, legacy interop only (broken collision resistance)
• SHA224 – 224 bit (SHA-2 family)
• SHA256 – 256 bit (SHA-2 family, recommended general-purpose hash)
• SHA384 – 384 bit (SHA-2 family)
• SHA512 – 512 bit (SHA-2 family)

Quick example

byte[] digest = Hash.sha256("hello".getBytes("UTF-8"));
String hex    = Hash.toHex(digest);

// streaming
Hash h = Hash.create(Hash.SHA256);
h.update("hello".getBytes("UTF-8"));
h.update(" world".getBytes("UTF-8"));
byte[] out = h.digest();

The implementations are written entirely in portable Java so they are available on every supported platform. They produce identical output to the equivalent algorithm in the standard JDK.