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/**
 * HMAC 实现
 * ipad = the byte 0x36 repeated B times
 *opad = the byte 0x5C repeated B times.
 *
 *HMAC(text) = H( K XOR opad, H(K XOR ipad, text))
 *
 */
package com.eshore.tools.pbkdf2;

import com.eshore.tools.Bytes;

/**
 * 
 * @author eshore
 *
 */
public class HMAC {
	final static int SIZE_SHA256=32;
	final static  int SIZE_SHA224=28;
	final static int BlockSize = 64;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		HMAC h=	new HMAC("1".getBytes(),new Sha256());
		byte[] b = h.sum("1".getBytes());
		System.out.println(Bytes.toHexString(b));
		//System.out.println(hmac("abc","1",new Sha384()));
		System.out.println(hmac("abc","1",new Sha256()));
		System.out.println(hmac("abc","1",new Sha1()));
		System.out.println(hmac("abc","1",new MD5()));
		System.out.println(hmac("abc","1",new Sha512()));
		System.out.println(hmac("abc","1",new Sha384()));
	}
	public static String hmac(String password,String salt,Hash h){
		HMAC mac=	new HMAC(salt.getBytes(),h);
		return Bytes.toHexString(mac.sum(password.getBytes()));
	}
	
	public static String hmac(String salt,Hash h,String ...password){
		HMAC mac=	new HMAC(salt.getBytes(),h);
		for(int i=0;iblocksize){
			outer.write(key);
			key=outer.sum(null);
		}
		System.arraycopy(key, 0, ipad, 0, key.length);
		System.arraycopy(key, 0, opad, 0, key.length);
		for(int i=0;i