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/*********************************************************************************
 *                                                                               *
 * The MIT License (MIT)                                                         *
 *                                                                               *
 * Copyright (c) 2015-2020 aoju.org and other contributors.                      *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy  *
 * of this software and associated documentation files (the "Software"), to deal *
 * in the Software without restriction, including without limitation the rights  *
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 * copies of the Software, and to permit persons to whom the Software is         *
 * furnished to do so, subject to the following conditions:                      *
 *                                                                               *
 * The above copyright notice and this permission notice shall be included in    *
 * all copies or substantial portions of the Software.                           *
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   *
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 * THE SOFTWARE.                                                                 *
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package org.aoju.bus.crypto.digest;

import org.aoju.bus.core.lang.Algorithm;
import org.aoju.bus.crypto.Builder;

import java.io.File;
import java.io.InputStream;
import java.nio.charset.Charset;

/**
 * MD5算法
 *
 * @author Kimi Liu
 * @version 6.1.1
 * @since JDK 1.8+
 */
public class MD5 extends Digester {

    private static final long serialVersionUID = 1L;

    /**
     * 构造
     */
    public MD5() {
        super(Algorithm.MD5);
    }

    /**
     * 构造
     *
     * @param salt 盐值
     */
    public MD5(byte[] salt) {
        this(salt, 0, 1);
    }

    /**
     * 构造
     *
     * @param salt        盐值
     * @param digestCount 摘要次数，当此值小于等于1,默认为1。
     */
    public MD5(byte[] salt, int digestCount) {
        this(salt, 0, digestCount);
    }

    /**
     * 构造
     *
     * @param salt         盐值
     * @param saltPosition 加盐位置，即将盐值字符串放置在数据的index数，默认0
     * @param digestCount  摘要次数，当此值小于等于1,默认为1。
     */
    public MD5(byte[] salt, int saltPosition, int digestCount) {
        this();
        this.salt = salt;
        this.saltPosition = saltPosition;
        this.digestCount = digestCount;
    }

    /**
     * 创建MD5实例
     *
     * @return MD5
     */
    public static MD5 create() {
        return new MD5();
    }

    /**
     * 生成16位MD5摘要
     *
     * @param data    数据
     * @param charset 编码
     * @return 16位MD5摘要
     */
    public String digestHex16(String data, Charset charset) {
        return Builder.md5HexTo16(digestHex(data, charset));
    }

    /**
     * 生成16位MD5摘要
     *
     * @param data 数据
     * @return 16位MD5摘要
     */
    public String digestHex16(String data) {
        return Builder.md5HexTo16(digestHex(data));
    }

    /**
     * 生成16位MD5摘要
     *
     * @param data 数据
     * @return 16位MD5摘要
     */
    public String digestHex16(InputStream data) {
        return Builder.md5HexTo16(digestHex(data));
    }

    /**
     * 生成16位MD5摘要
     *
     * @param data 数据
     * @return 16位MD5摘要
     */
    public String digestHex16(File data) {
        return Builder.md5HexTo16(digestHex(data));
    }

    /**
     * 生成16位MD5摘要
     *
     * @param data 数据
     * @return 16位MD5摘要
     */
    public String digestHex16(byte[] data) {
        return Builder.md5HexTo16(digestHex(data));
    }

}