Swiften/StringCodecs/PBKDF2.h

/*
 * Copyright (c) 2010 Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#pragma once

#include <Swiften/Base/SafeByteArray.h>
#include <Swiften/Base/Concat.h>

namespace Swift {
  class PBKDF2 {
    public:
      template<typename PRF>
      static ByteArray encode(const SafeByteArray& password, const ByteArray& salt, int iterations) {
        PRF prf;
        ByteArray u = prf(password, concat(salt, createByteArray("\0\0\0\1", 4)));
        ByteArray result(u);
        int i = 1;
        while (i < iterations) {
          u = prf(password, u);
          for (unsigned int j = 0; j < u.size(); ++j) {
            result[j] ^= u[j];
          }
          ++i;
        }
        return result;
      }
  };
}