Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.cloudinary; import org.bouncycastle.crypto.Digest; import org.bouncycastle.crypto.digests.SHA1Digest; /** * * @author shannah */ class MessageDigest { static MessageDigest getInstance(String shA1) throws NoSuchAlgorithmException { if (!"SHA-1".equals(shA1)) { throw new NoSuchAlgorithmException(); } MessageDigest d = new MessageDigest(); return d; } byte[] digest(byte[] bytes) { Digest digest = new SHA1Digest(); byte[] resBuf = new byte[digest.getDigestSize()]; digest.update(bytes, 0, bytes.length); digest.doFinal(resBuf, 0); return resBuf; } }