package com.fr.plugin.tools;


import com.fanruan.api.log.LogKit;
import com.fr.plugin.UASSLOGINConfig;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;

/**
 *
 */


public class ToolDES {
    //public final static String PRIVACY_KEY = WebContant.DES_PRIVACYKEY;
    public final static String PRIVACY_KEY;
    private static final String Algorithm = "DESede"; // 定义
    private static final String encoding = "UTF8";
    // 密钥
    private static byte[] keyBytes = null;

    static {
        // String temp = "chinamobileimpgwandother" ;
        PRIVACY_KEY = UASSLOGINConfig.getInstance().getSecret();
        keyBytes = UASSLOGINConfig.getInstance().getSecret().getBytes(StandardCharsets.UTF_8);
    }

    // keybyte为加密密钥，长度为24字节
    // src为被加密的数据缓冲区（源）
    public static byte[] encryptMode(byte[] keybyte, byte[] src) {
        try {
            // 生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

            // 加密
            Cipher c1 = Cipher.getInstance(Algorithm);
            c1.init(Cipher.ENCRYPT_MODE, deskey);
            return c1.doFinal(src);
        } catch (java.lang.Exception e) {
            LogKit.error("", e);
        }
        return null;
    }

    // keybyte为加密密钥，长度为24字节
    // src为加密后的缓冲区
    public static byte[] decryptMode(byte[] keybyte, byte[] src) throws Exception {

        // 生成密钥
        SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

        // 解密
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.DECRYPT_MODE, deskey);
        return c1.doFinal(src);
    }

    // 转换成十六进制字符串
    private static String byte2hexString(byte[] bytes) {
        StringBuffer buf = new StringBuffer(bytes.length * 2);
        for (int i = 0; i < bytes.length; i++) {
            if (((int) bytes[i] & 0xff) < 0x10) {
                buf.append("0");
            }
            buf.append(Long.toString((int) bytes[i] & 0xff, 16));
        }
        return buf.toString();
    }

    // 将十六进制字符串byte数组
    private static byte[] hexString2byte(String hexString) {
        if (hexString == null || hexString.length() % 2 != 0) {
            return null;
        }
        byte[] hanzi = new byte[hexString.length() / 2];
        for (int i = 0; i < hexString.length(); i += 2) {
            hanzi[i / 2] = (byte) (Integer.parseInt(hexString.substring(i, i + 2), 16) & 0xff);
        }
        return hanzi;
    }

    /**
     * 加密字符串
     *
     * @param src 源字符串
     * @return 加密后的字符串
     */
    public static String encrypt(String src) {
        String key = PRIVACY_KEY;
        String result = null;
        if (src == null) {
            return result;
        }
        try {
            EncryptTool ent = new EncryptTool();
            // 加密字符串
            LogKit.debug("加密字符串：" + ent);
            result = ent.encryptString(src, key);

        } catch (Exception e) {
            LogKit.error("Exception occurred while encrypting [ " + src + " ] ,key[" + key + "],", e);
            return null;
        }
        return result;
    }

    public static byte[] getKeyBytes(String key) {
        if (key != null && "".equals(key)) {
            key = PRIVACY_KEY;
        }
        if (key != null) {
            keyBytes = key.getBytes();
        }
        return keyBytes;
    }

}