• .NET 实现DES加密解密处理


    .NET 实现DES加密解密处理

    using System; 
    using System.Text; 
    using System.Security.Cryptography;
    using System.IO;
    
    namespace ConsoleApplication1
    {
        class Program
        {
            static void Main(string[] args)
            {
                string a1 = EncryptDES("123123123123");
                Console.WriteLine(a1);
                string a2 = DecryptDES(a1);
                Console.WriteLine(a2); 
                Console.Read();  
            }
            //默认密钥向量
            private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
            //默认加密密码
            private static string DefEncryptKey = "consmkey";
            /// <summary>
            /// DES加密字符串
            /// </summary>
            /// <param name="encryptString">待加密的字符串</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)
            {
                return EncryptDES(encryptString, DefEncryptKey);
            }
    
            /// <summary>
            /// DES解密字符串
            /// </summary>
            /// <param name="decryptString">待解密的字符串</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)
            {
                return DecryptDES(decryptString, DefEncryptKey);
            }
    
            /// <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(0, 8));
                    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/swjian/p/7929847.html
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