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  • 【原】DES Encrypt / Decrypt

    using System;
    using System.Collections.Generic;
    using System.Security.Cryptography;
    using System.IO;
    using System.Text;
    
    namespace WB.OBE.OES.Common
    {
        public static class EncryptExtensions
        {
    
            private static byte[] Keys = { 0xEF, 0xAB, 0x56, 0x78, 0x90, 0x34, 0xCD, 0x12 };
            /// <summary>
            /// DES Encrypt
            /// </summary>
            /// <param name="encryptString"></param>
            /// <param name="encryptKey">encryptKey</param>
            /// <returns></returns>
            public static string EncryptDES(this 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 Decrypt
            /// </summary>
            /// <param name="decryptString"></param>
            /// <param name="decryptKey"></param>
            /// <returns></returns>
            public static string DecryptDES(this string decryptString, string decryptKey)
            {
                try
                {
                    byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
                    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/luckylei66/p/2838573.html
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