com.arrow.acn.client.utils.MD5Util.java Source code

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Here is the source code for com.arrow.acn.client.utils.MD5Util.java

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/*******************************************************************************
 * Copyright (c) 2018 Arrow Electronics, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License 2.0
 * which accompanies this distribution, and is available at
 * http://apache.org/licenses/LICENSE-2.0
 *
 * Contributors:
 *     Arrow Electronics, Inc.
 *******************************************************************************/
package com.arrow.acn.client.utils;

import java.io.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.apache.commons.codec.binary.Hex;

public class MD5Util {
    public static final int BUFFER_SIZE = 8192;

    public static byte[] calcMD5Checksum(Path path) throws NoSuchAlgorithmException, IOException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        try (SeekableByteChannel sbc = Files.newByteChannel(path)) {
            ByteBuffer buf = ByteBuffer.allocateDirect(BUFFER_SIZE);
            while (sbc.read(buf) > 0) {
                buf.flip();
                md.update(buf);
                buf.clear();
            }
        }
        return md.digest();
    }

    public static byte[] calcMD5Checksum(File file) throws NoSuchAlgorithmException, IOException {
        return calcMD5Checksum(file.toPath());
    }

    public static byte[] calcMD5Checksum(String pathname) throws NoSuchAlgorithmException, IOException {
        return calcMD5Checksum(new File(pathname));
    }

    public static String calcMD5ChecksumString(Path path) throws NoSuchAlgorithmException, IOException {
        return Hex.encodeHexString(calcMD5Checksum(path));
    }

    public static String calcMD5ChecksumString(File file) throws NoSuchAlgorithmException, IOException {
        return Hex.encodeHexString(calcMD5Checksum(file));
    }

    public static String calcMD5ChecksumString(String pathname) throws NoSuchAlgorithmException, IOException {
        return Hex.encodeHexString(calcMD5Checksum(pathname));
    }
}