Java examples for Security:SHA
Computes a HMAC-SHA1 message digest of a given message, appends it to the message, returns the output.
//package com.java2s; import javax.crypto.*; import javax.crypto.spec.*; public class Main { /**/*from ww w.ja va 2 s .c om*/ * Computes a HMAC-SHA1 message digest of a given message, appends it to the * message, returns the output. * * @param message the message (in bytes) * @param keySpec the secret key for HMAC-SHA1 * @return message concatenated with the HMAC-SHA1 digest */ public static byte[] append_hash(byte[] message, SecretKeySpec keySpec) { byte[] ret = null; try { // Initialize the MAC with the given key Mac mac = Mac.getInstance("HmacSHA1"); mac.init(keySpec); // Compute the MAC byte[] m = mac.doFinal(message); // Append the MAC to the message ret = new byte[message.length + m.length]; System.arraycopy(message, 0, ret, 0, message.length); System.arraycopy(m, 0, ret, message.length, m.length); } catch (Exception e) { e.printStackTrace(); } return ret; } }