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  • Encrypt and Decrypt

    using System;
    using System.Text;
    using System.Security.Cryptography;
    using System.IO;

    //默认密钥向量
    private static byte[] Keys = { 0x120x340x560x780x900xAB0xCD0xEF };
    /// <summary>
    /// DES加密字符串
    /// </summary>
    /// <param name="encryptString">待加密的字符串</param>
    /// <param name="encryptKey">加密密钥,要求为8位</param>
    /// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
    public static string EncryptDES(string encryptString, string encryptKey)
    {
        
    try
        {
            
    byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(08));
            
    byte[] rgbIV = Keys;
            
    byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
            DESCryptoServiceProvider dCSP 
    = new DESCryptoServiceProvider();
            MemoryStream mStream 
    = new MemoryStream();
            CryptoStream cStream 
    = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 
    0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            
    return Convert.ToBase64String(mStream.ToArray());
        }
        
    catch
        {
            
    return encryptString;
        }
    }

    /// <summary>
    /// DES解密字符串
    /// </summary>
    /// <param name="decryptString">待解密的字符串</param>
    /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
    /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
    public static string DecryptDES(string decryptString, string decryptKey)
    {
        
    try
        {
            
    byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
            
    byte[] rgbIV = Keys;
            
    byte[] inputByteArray = Convert.FromBase64String(decryptString);
            DESCryptoServiceProvider DCSP 
    = new DESCryptoServiceProvider();
            MemoryStream mStream 
    = new MemoryStream();
            CryptoStream cStream 
    = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 
    0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            
    return Encoding.UTF8.GetString(mStream.ToArray());
        }
        
    catch
        {
            
    return decryptString;
        }
    }
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  • 原文地址:https://www.cnblogs.com/Mac_Hui/p/1654299.html
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