/*******************************************************************************
 * Copyright 2017 [email protected]
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package org.iotp.infomgt.dao;

import org.bouncycastle.crypto.digests.SHA3Digest;
import org.bouncycastle.pqc.math.linearalgebra.ByteUtils;

import lombok.extern.slf4j.Slf4j;
/**
 */
@Slf4j
public class EncryptionUtil {

    private EncryptionUtil() {
    }

    public static String trimNewLines(String input) {
        return input.replaceAll("-----BEGIN CERTIFICATE-----", "")
                .replaceAll("-----END CERTIFICATE-----", "")
                .replaceAll("\n","")
                .replaceAll("\r","");
    }

    public static String getSha3Hash(String data) {
        String trimmedData = trimNewLines(data);
        byte[] dataBytes = trimmedData.getBytes();
        SHA3Digest md = new SHA3Digest(256);
        md.reset();
        md.update(dataBytes, 0, dataBytes.length);
        byte[] hashedBytes = new byte[256 / 8];
        md.doFinal(hashedBytes, 0);
        String sha3Hash = ByteUtils.toHexString(hashedBytes);
        return sha3Hash;
    }
}