/*

 * Copyright (c) 2010, Isode Limited, London, England.

 * All rights reserved.

 */

/*

 * Copyright (c) 2010, Remko Tronçon.

 * All rights reserved.

 */

package com.isode.stroke.stringcodecs;

import com.isode.stroke.base.ByteArray;

public class PBKDF2 {

    public static ByteArray encode(ByteArray password, ByteArray salt, int iterations) {

        ByteArray u = HMACSHA1.getResult(password, ByteArray.plus(salt, new ByteArray("\0\0\0\1")));

        ByteArray result = new ByteArray(u);

        byte[] resultData = result.getData();

        int i = 1;

        while (i < iterations) {

            u = HMACSHA1.getResult(password, u);

            for (int j = 0; j < u.getSize(); ++j) {

                resultData[j] ^= u.getData()[j];

            }

            ++i;

        }

        return result;

    }

}