java des cbc加密 后.net去解密

Question

package com.besttone.commons;import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;import sun.misc.BASE64Encoder;
public class DESUtil2 {

 /**
   *
   * @return DES算法密钥
   */
   public static byte[] generateKey() {
        try {             // DES算法要求有一个可信任的随机数源
            SecureRandom sr = new SecureRandom();             // 生成一个DES算法的KeyGenerator对象
            KeyGenerator kg = KeyGenerator.getInstance("DES");
            kg.init(sr);             // 生成密钥
            SecretKey secretKey = kg.generateKey();             // 获取密钥数据
            byte[] key = secretKey.getEncoded();             return key;
        } catch (NoSuchAlgorithmException e) {
            System.err.println("DES算法，生成密钥出错!");
            e.printStackTrace();
        }         return null;
   }    /**
   * 加密函数
   *
   * @param data
   *            加密数据
   * @param key
   *            密钥
   * @return 返回加密后的数据
   */
   public static byte[] encrypt(byte[] data, byte[] key) {         try {             // DES算法要求有一个可信任的随机数源
            SecureRandom sr = new SecureRandom();             // 从原始密钥数据创建DESKeySpec对象
            DESKeySpec dks = new DESKeySpec(key);             // 创建一个密匙工厂，然后用它把DESKeySpec转换成
            // 一个SecretKey对象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(dks);             // using DES in ECB mode
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");             // 用密匙初始化Cipher对象
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);             // 执行加密操作
            byte encryptedData[] = cipher.doFinal(data);             return encryptedData;
        } catch (Exception e) {
            System.err.println("DES算法，加密数据出错!");
            e.printStackTrace();
        }         return null;
   }    /**
   * 解密函数
   *
   * @param data
   *            解密数据
   * @param key
   *            密钥
   * @return 返回解密后的数据
   */
   public static byte[] decrypt(byte[] data, byte[] key) {
        try {
            // DES算法要求有一个可信任的随机数源
            SecureRandom sr = new SecureRandom();             // byte rawKeyData[] = /* 用某种方法获取原始密匙数据 */;             // 从原始密匙数据创建一个DESKeySpec对象
            DESKeySpec dks = new DESKeySpec(key);             // 创建一个密匙工厂，然后用它把DESKeySpec对象转换成
            // 一个SecretKey对象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(dks);             // using DES in ECB mode
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");             // 用密匙初始化Cipher对象
            cipher.init(Cipher.DECRYPT_MODE, secretKey, sr);             // 正式执行解密操作
            byte decryptedData[] = cipher.doFinal(data);             return decryptedData;
        } catch (Exception e) {
            System.err.println("DES算法，解密出错。");
            e.printStackTrace();
        }         return null;
   }    /**
   * 加密函数
   *
   * @param data
   *            加密数据
   * @param key
   *            密钥
   * @return 返回加密后的数据
   */
   public static byte[] CBCEncrypt(byte[] data, byte[] key, byte[] iv) {         try {
            // 从原始密钥数据创建DESKeySpec对象
            DESKeySpec dks = new DESKeySpec(key);             // 创建一个密匙工厂，然后用它把DESKeySpec转换成
            // 一个SecretKey对象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(dks);             // Cipher对象实际完成加密操作
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            // 若采用NoPadding模式，data长度必须是8的倍数
            // Cipher cipher = Cipher.getInstance("DES/CBC/NoPadding");             // 用密匙初始化Cipher对象
            IvParameterSpec param = new IvParameterSpec(iv);
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, param);             // 执行加密操作
            byte encryptedData[] = cipher.doFinal(data);             return encryptedData;
        } catch (Exception e) {
            System.err.println("DES算法，加密数据出错!");
            e.printStackTrace();
        }         return null;
   }    /**
   * 解密函数
   *
   * @param data
   *            解密数据
   * @param key
   *            密钥
   * @return 返回解密后的数据
   */
   public static byte[] CBCDecrypt(byte[] data, byte[] key, byte[] iv) {
        try {
            // 从原始密匙数据创建一个DESKeySpec对象
            DESKeySpec dks = new DESKeySpec(key);             // 创建一个密匙工厂，然后用它把DESKeySpec对象转换成
            // 一个SecretKey对象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(dks);             // using DES in CBC mode
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            // 若采用NoPadding模式，data长度必须是8的倍数
            // Cipher cipher = Cipher.getInstance("DES/CBC/NoPadding");             // 用密匙初始化Cipher对象
            IvParameterSpec param = new IvParameterSpec(iv);
            cipher.init(Cipher.DECRYPT_MODE, secretKey, param);             // 正式执行解密操作
            byte decryptedData[] = cipher.doFinal(data);             return decryptedData;
        } catch (Exception e) {
            System.err.println("DES算法，解密出错。");
            e.printStackTrace();
        }         return null;
   }    public static void main(String[] args) {
        try {
            byte[] key = "NEMOBIlE".getBytes();
            byte[] iv = "NEMOBIlE".getBytes();
            byte[] data = DESUtil2.CBCEncrypt("测试商品".getBytes(), key, iv);
            System.out.println("加密前: 测试商品");
          //加密转换  
            BASE64Encoder enc = new BASE64Encoder();  
            //加密运算之后 将byte[]转化为base64的String  
            String encryptedtext = enc.encode(data); 
//             System.out.println("加密后:" + data.toString());
            System.out.println("加密后:" + encryptedtext);
            System.out.println("解密后:" + new String(DESUtil2.CBCDecrypt(data, key, iv)));
            
        } catch (Exception e) {
            e.printStackTrace();
        }
   } 
}

Answer 1

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
 
using System.Security.Cryptography;
using System.IO;
using System.Text;namespace MobileCommonPay.Tool
{
    public class DES2
    {        // CBC模式        string iv = "NEMOBIlE";
        string key = "NEMOBIlE";        /// <summary>
        /// DES加密偏移量，必须是>=8位长的字符串
        /// </summary>
        public string IV
        {
            get { return iv; }
            set { iv = value; }
        }        /// <summary>
        /// DES加密的私钥，必须是8位长的字符串
        /// </summary>
        public string Key
        {
            get { return key; }
            set { key = value; }
        }        /// <summary>
        /// 对字符串进行DES加密
        /// </summary>
        /// <param name="sourceString">待加密的字符串</param>
        /// <returns>加密后的BASE64编码的字符串</returns>
        public string Encrypt(string sourceString)
        {
            byte[] btKey = Encoding.Default.GetBytes(key);
            byte[] btIV = Encoding.Default.GetBytes(iv);
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            using (MemoryStream ms = new MemoryStream())
            {
                byte[] inData = Encoding.Default.GetBytes(sourceString);
                try
                {
                    using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write))
                    {
                        cs.Write(inData, 0, inData.Length);
                        cs.FlushFinalBlock();
                    }
                    return Convert.ToBase64String(ms.ToArray());
                }
                catch (Exception ex)
                {
                    return ex.Message;
                }
            }
        }        /// <summary>
        /// 对DES加密后的字符串进行解密
        /// </summary>
        /// <param name="encryptedString">待解密的字符串</param>
        /// <returns>解密后的字符串</returns>
        public string Decrypt(string encryptedString)
        {
            byte[] btKey = Encoding.Default.GetBytes(key);
            byte[] btIV = Encoding.Default.GetBytes(iv);
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();            using (MemoryStream ms = new MemoryStream())
            {
                byte[] inData = Convert.FromBase64String(encryptedString);
                try
                {
                    using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
                    {
                        cs.Write(inData, 0, inData.Length);
                        cs.FlushFinalBlock();
                    }
                    return Encoding.Default.GetString(ms.ToArray());
                }
                catch (Exception ex)
                {
                    return ex.Message;
                }
            }
        }        /// <summary>
        /// 对文件内容进行DES加密
        /// </summary>
        /// <param name="sourceFile">待加密的文件绝对路径</param>
        /// <param name="destFile">加密后的文件保存的绝对路径</param>
        public void EncryptFile(string sourceFile, string destFile)
        {
            if (!File.Exists(sourceFile)) throw new FileNotFoundException("指定的文件路径不存在！", sourceFile);            byte[] btKey = Encoding.Default.GetBytes(key);
            byte[] btIV = Encoding.Default.GetBytes(iv);
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] btFile = File.ReadAllBytes(sourceFile);            using (FileStream fs = new FileStream(destFile, FileMode.Create, FileAccess.Write))
            {
                try
                {
                    using (CryptoStream cs = new CryptoStream(fs, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write))
                    {
                        cs.Write(btFile, 0, btFile.Length);
                        cs.FlushFinalBlock();
                    }
                }
                catch
                {
                    throw;
                }
                finally
                {
                    fs.Close();
                }
            }
        }        /// <summary>
        /// 对文件内容进行DES加密，加密后覆盖掉原来的文件
        /// </summary>
        /// <param name="sourceFile">待加密的文件的绝对路径</param>
        public void EncryptFile(string sourceFile)
        {
            EncryptFile(sourceFile, sourceFile);
        }        /// <summary>
        /// 对文件内容进行DES解密
        /// </summary>
        /// <param name="sourceFile">待解密的文件绝对路径</param>
        /// <param name="destFile">解密后的文件保存的绝对路径</param>
        public void DecryptFile(string sourceFile, string destFile)
        {
            if (!File.Exists(sourceFile)) throw new FileNotFoundException("指定的文件路径不存在！", sourceFile);            byte[] btKey = Encoding.Default.GetBytes(key);
            byte[] btIV = Encoding.Default.GetBytes(iv);
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] btFile = File.ReadAllBytes(sourceFile);            using (FileStream fs = new FileStream(destFile, FileMode.Create, FileAccess.Write))
            {
                try
                {
                    using (CryptoStream cs = new CryptoStream(fs, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
                    {
                        cs.Write(btFile, 0, btFile.Length);
                        cs.FlushFinalBlock();
                    }
                }
                catch
                {
                    throw;
                }
                finally
                {
                    fs.Close();
                }
            }
        }        /// <summary>
        /// 对文件内容进行DES解密，加密后覆盖掉原来的文件
        /// </summary>
        /// <param name="sourceFile">待解密的文件的绝对路径</param>
        public void DecryptFile(string sourceFile)
        {
            DecryptFile(sourceFile, sourceFile);
        }
    }
}

Answer 2

已经解决，是编码的问题 只要把.net的default格式做成utf-8就行

Answer 3

我曾经写的也是这样。就因为没有转成 utf-8.恭喜楼主成功解决呀