.net / java /安卓des加密互通

一 、 C#.net
     /// <summary>
           /// 加密数据
           /// </summary>
           /// <param name="Text"></param>
           /// <param name="sKey"></param>
           /// <returns></returns>
           public static string Encrypt(string Text,string sKey)
           {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            des.Mode = System.Security.Cryptography.CipherMode.ECB;
            byte[] inputByteArray;
            inputByteArray=Encoding.Default.GetBytes(Text);
            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey.Substring(,));
            des.IV = ASCIIEncoding.ASCII.GetBytes(sKey.Substring(, ));
            System.IO.MemoryStream ms=new System.IO.MemoryStream();
            CryptoStream cs=new CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write);
            cs.Write(inputByteArray,,inputByteArray.Length);
            cs.FlushFinalBlock();
            StringBuilder ret=new StringBuilder();
            foreach( byte b in ms.ToArray())
            {
             ret.AppendFormat("{0:X2}",b);
            }
            return ret.ToString();
           }

       /// <summary>
       /// 解密数据
       /// </summary>
       /// <param name="Text"></param>
       /// <param name="sKey"></param>
       /// <returns></returns>
       public static string Decrypt(string Text, string sKey)
       {

           DESCryptoServiceProvider des = new DESCryptoServiceProvider();
           des.Mode = System.Security.Cryptography.CipherMode.ECB;
           int len;
           len = Text.Length / ;
           byte[] inputByteArray = new byte[len];
           int x, i;
           for (x = ; x < len; x++)
           {
               string txt = Text.Substring(x * , );
               i = Convert.ToInt32(txt, );
               inputByteArray[x] = (byte)i;
           }
           des.Key = ASCIIEncoding.ASCII.GetBytes(sKey.Substring(, ));
           des.IV = ASCIIEncoding.ASCII.GetBytes(sKey.Substring(, ));
           System.IO.MemoryStream ms = new System.IO.MemoryStream();
           CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
           cs.Write(inputByteArray, , inputByteArray.Length);
           cs.FlushFinalBlock();
           return Encoding.Default.GetString(ms.ToArray());
       } 

二、安卓
package com.autoapp.pianostave.utils;

/**
 * Created by AndroidJiangJun on 2017/4/18.
 */

import java.security.Key;

import javax.crypto.Cipher;

public class DesUtil {

    private static String strDefaultKey = "national";

    private Cipher encryptCipher = null;

    private Cipher decryptCipher = null;

    /**
     * 将byte数组转换为表示16进制值的字符串， 如：byte[]{8,18}转换为：0813， 和public static byte[] hexStr2ByteArr(String strIn) 互为可逆的转换过程
     *
     * @param arrB 需要转换的byte数组
     * @return 转换后的字符串
     * @throws Exception 本方法不处理任何异常，所有异常全部抛出
     */
    public static String byteArr2HexStr(byte[] arrB) throws Exception {
        int iLen = arrB.length;
        // 每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍
        StringBuffer sb = new StringBuffer(iLen * );
        for (int i = ; i < iLen; i++) {
            int intTmp = arrB[i];
            // 把负数转换为正数
            while (intTmp < ) {
                intTmp = intTmp + ;
            }
            // 小于0F的数需要在前面补0
            if (intTmp < ) {
                sb.append("");
            }
            sb.append(Integer.toString(intTmp, ));
        }
        return sb.toString();
    }

    /**
     * 将表示16进制值的字符串转换为byte数组， 和public static String byteArr2HexStr(byte[] arrB) 互为可逆的转换过程
     *
     * @param strIn 需要转换的字符串
     * @return 转换后的byte数组
     * @throws Exception 本方法不处理任何异常，所有异常全部抛出 @ <a href="mailto:leo841001@163.com">LiGuoQing</a>
     */
    public static byte[] hexStr2ByteArr(String strIn) throws Exception {
        byte[] arrB = strIn.getBytes();
        int iLen = arrB.length;

        // 两个字符表示一个字节，所以字节数组长度是字符串长度除以2
        byte[] arrOut = new byte[iLen / ];
        for (int i = ; i < iLen; i = i + ) {
            String strTmp = new String(arrB, i, );
            arrOut[i / ] = (byte) Integer.parseInt(strTmp, );
        }
        return arrOut;
    }

    /**
     * 默认构造方法，使用默认密钥
     *
     * @throws Exception
     */
    public DesUtil() throws Exception {
        this(strDefaultKey);
    }

    /**
     * 指定密钥构造方法
     *
     * @param strKey 指定的密钥
     * @throws Exception
     */
    public DesUtil(String strKey) throws Exception {
        Key key = getKey(strKey.getBytes());

        // NoPadding
        // PKCS5Padding

        encryptCipher = Cipher.getInstance("DES");
        encryptCipher.init(Cipher.ENCRYPT_MODE, key);

        decryptCipher = Cipher.getInstance("DES");
        decryptCipher.init(Cipher.DECRYPT_MODE, key);

    }

    /**
     * 加密字节数组
     *
     * @param arrB 需加密的字节数组
     * @return 加密后的字节数组
     * @throws Exception
     */
    public byte[] encrypt(byte[] arrB) throws Exception {
        return encryptCipher.doFinal(arrB);
    }

    /**
     * 加密字符串
     *
     * @param strIn 需加密的字符串
     * @return 加密后的字符串
     * @throws Exception
     */
    public String encrypt(String strIn, String encode) throws Exception {
        return byteArr2HexStr(encrypt(strIn.getBytes(encode)));
    }

    /**
     * 解密字节数组
     *
     * @param arrB 需解密的字节数组
     * @return 解密后的字节数组
     * @throws Exception
     */
    public byte[] decrypt(byte[] arrB) throws Exception {
        return decryptCipher.doFinal(arrB);
    }

    /**
     * 解密字符串
     *
     * @param strIn 需解密的字符串
     * @return 解密后的字符串
     * @throws Exception
     */
    public String decrypt(String strIn, String encode) throws Exception {
        return new String(decrypt(hexStr2ByteArr(strIn)), encode);
    }

    /**
     * 从指定字符串生成密钥，密钥所需的字节数组长度为8位 不足8位时后面补0，超出8位只取前8位
     *
     * @param arrBTmp 构成该字符串的字节数组
     * @return 生成的密钥
     * @throws Exception
     */
    private Key getKey(byte[] arrBTmp) throws Exception {
        // 创建一个空的8位字节数组（默认值为0）
        byte[] arrB = new byte[];

        // 将原始字节数组转换为8位
        for (int i = ; i < arrBTmp.length && i < arrB.length; i++) {
            arrB[i] = arrBTmp[i];
        }

        // 生成密钥
        Key key = new javax.crypto.spec.SecretKeySpec(arrB, "DES");

        return key;
    }

    /**
     * DES加密
     *
     * @param key
     * @param str
     * @param encode
     * @return
     */
    public static String encrypt(String key, String str, String encode) {
        try {
            byte[] strBytes = str.getBytes(encode);
            byte[] newStrBytes = new byte[strBytes.length + ( - strBytes.length % )];
            for (int i = ; i < newStrBytes.length; i++) {
                newStrBytes[i] = i < strBytes.length ? strBytes[i] : ;
            }//for
            return new DesUtil(key).encrypt(new String(newStrBytes, encode), encode);
        } catch (Exception e) {
            e.printStackTrace();
            //throw new MPayException(MPayException.MPAY_DES_ERROR,"加密失败",e);
            return "加密失败";
        }
    }

    /**
     * DES解密
     *
     * @param key
     * @param str
     * @param encode
     * @return
     */
    public static String decrypt(String key, String str, String encode) {
        try {
            return new DesUtil(key).decrypt(str, encode).replaceAll("\\s*$", "");
        } catch (Exception e) {
            e.printStackTrace();
            //throw new MPayException(MPayException.MPAY_DES_ERROR,"解密失败",e);
            return "解密失败";
        }//try
    }

三、Java

/** *//**
    * DES加解密
    *
    * @param plainText
    *            要处理的byte[]
    * @param key
    *            密钥
    * @param mode
    *            模式
    * @return
    * @throws InvalidKeyException
    * @throws InvalidKeySpecException
    * @throws NoSuchAlgorithmException
    * @throws NoSuchPaddingException
    * @throws BadPaddingException
    * @throws IllegalBlockSizeException
    * @throws UnsupportedEncodingException
    * @author yayagepei
    * @date 2008-10-8
    */
   private static byte[] coderByDES(byte[] plainText, String key, int mode)
           throws InvalidKeyException, InvalidKeySpecException,
           NoSuchAlgorithmException, NoSuchPaddingException,
           BadPaddingException, IllegalBlockSizeException,
           UnsupportedEncodingException {
       SecureRandom sr = new SecureRandom();
       byte[] resultKey = makeKey(key);
       DESKeySpec desSpec = new DESKeySpec(resultKey);
       SecretKey secretKey = SecretKeyFactory.getInstance("DES").generateSecret(desSpec);
       Cipher cipher = Cipher.getInstance("DES");
       cipher.init(mode, secretKey, sr);
       return cipher.doFinal(plainText);
   }

   /** *//**
    * 生产8位的key
    *
    * @param key
    *            字符串形式
    * @return
    * @throws UnsupportedEncodingException
    * @author yayagepei
    * @date 2008-10-8
    */
   private static byte[] makeKey(String key)
           throws UnsupportedEncodingException {
       byte[] keyByte = new byte[];
       byte[] keyResult = key.getBytes("UTF-8");
       for (int i = ; i < keyResult.length && i < keyByte.length; i++) {
           keyByte[i] = keyResult[i];
       }
       return keyByte;
   }

   /** *//**
    * DES加密
    *
    * @param plainText
    *            明文
    * @param key
    *            密钥
    * @return
    * @author yayagepei
    * @date 2008-10-8
    */
   public static String encoderByDES(String plainText, String key) {
       try {
           byte[] result = coderByDES(plainText.getBytes("UTF-8"), key,
                   Cipher.ENCRYPT_MODE);
           return byteArr2HexStr(result);
       } catch (Exception ex) {
           ex.printStackTrace();
           return "";
       }
   }

   /** *//**
    * DES解密
    *
    * @param secretText
    *            密文
    * @param key
    *            密钥
    * @return
    * @author yayagepei
 * @throws Exception
    * @date 2008-10-8
    */
   public static String decoderByDES(String secretText, String key) throws Exception {
           byte[] result = coderByDES(hexStr2ByteArr(secretText), key,
                   Cipher.DECRYPT_MODE);
           return new String(result, "UTF-8");
   }

   /** *//**
    * 将byte数组转换为表示16进制值的字符串， 如：byte[]{8,18}转换为：0813， 和public static byte[]
    * hexStr2ByteArr(String strIn) 互为可逆的转换过程
    *
    * @param arrB
    *            需要转换的byte数组
    * @return 转换后的字符串
    */
   private static String byteArr2HexStr(byte[] arrB){
       int iLen = arrB.length;
       // 每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍
       StringBuffer sb = new StringBuffer(iLen * );
       for (int i = ; i < iLen; i++) {
           int intTmp = arrB[i];
           // 把负数转换为正数
           while (intTmp < ) {
               intTmp = intTmp + ;
           }
           // 小于0F的数需要在前面补0
           if (intTmp < ) {
               sb.append("");
           }
           sb.append(Integer.toString(intTmp, ));
       }
       return sb.toString();
   }

   /** *//**
    * 将表示16进制值的字符串转换为byte数组， 和public static String byteArr2HexStr(byte[] arrB)
    * 互为可逆的转换过程
    *
    * @param strIn
    *            需要转换的字符串
    * @return 转换后的byte数组
    * @throws NumberFormatException
    */
   private static byte[] hexStr2ByteArr(String strIn)
           throws NumberFormatException {
       byte[] arrB = strIn.getBytes();
       int iLen = arrB.length;
       // 两个字符表示一个字节，所以字节数组长度是字符串长度除以2
       byte[] arrOut = new byte[iLen / ];
       for (int i = ; i < iLen; i = i + ) {
           String strTmp = new String(arrB, i, );
           arrOut[i / ] = (byte) Integer.parseInt(strTmp, );
       }
       return arrOut;
   }