package com.rngoldenkeystore.libs;

import org.spongycastle.crypto.PBEParametersGenerator;
import org.spongycastle.crypto.digests.SHA512Digest;
import org.spongycastle.crypto.generators.PKCS5S2ParametersGenerator;
import org.spongycastle.crypto.params.KeyParameter;

/**
 * Created by skylab on 7/23/18.
 */

public enum SpongyCastlePBKDF2WithHmacSHA512 implements IPBKDF2WithHmacSHA512Algorithm {
    INSTANCE;

    @Override
    public byte[] hash(char[] chars, byte[] salt) {
        PKCS5S2ParametersGenerator generator = new PKCS5S2ParametersGenerator(new SHA512Digest());
        generator.init(PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(chars), salt, 2048);
        KeyParameter key = (KeyParameter) generator.generateDerivedMacParameters(512);
        return key.getKey();
    }
}