1 /*

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

     3  * All rights reserved.

     4  */

     5 /*

     6  * Copyright (c) 2010, Remko Tronçon.

     7  * All rights reserved.

     8  */

     9 package com.isode.stroke.stringcodecs;

    10 

    11 import com.isode.stroke.base.ByteArray;

    12 

    13 public class PBKDF2 {

    14 

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

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

    17         ByteArray result = new ByteArray(u);

    18         byte[] resultData = result.getData();

    19         int i = 1;

    20         while (i < iterations) {

    21             u = HMACSHA1.getResult(password, u);

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

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

    24             }

    25             ++i;

    26         }

    27         return result;

    28     }

    29 }