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简介.Net框架下的各种加密解密算法2013-08-18该文章将会不断的收入.net下的加密算法，这些算法将会采用策略模式来统一管理。

using System;using System.Collections.Generic;using System.Text;namespace EncryptAndDecrypt{ public class EncryptAndDecrytHandler{IEncrytAndDecrypt _EncryptAndDecrypt;public EncryptAndDecrytHandler（IEncrytAndDecrypt iencrytanddecrypt）{_EncryptAndDecrypt = iencrytanddecrypt;}public string Encrypt（string data）{return _EncryptAndDecrypt.Encrypt（data）;}public string Decrypt（string data）{return _EncryptAndDecrypt.Decrypt（data）;}}}

加密解密的调用者

using System;using System.Collections.Generic;using System.Text;namespace EncryptAndDecrypt{public interface IEncrytAndDecrypt{ string Encrypt（string data）; string Decrypt（string data）;}}

策略接口

using System;using System.Collections.Generic;using System.Text;using System.Security.Cryptography;using System.IO;namespace EncryptAndDecrypt{public class DESCrypt:IEncrytAndDecrypt{private byte[] rgbKey = new byte[] { 1, 9, 8, 7, 0, 1, 0, 3 };private byte[] rgbIv = new byte[] { 1, 9, 8, 7, 0, 1, 0, 3 };#region IEncrytAndDecrypt 成员public string Encrypt（string data）{MemoryStream mstream = new MemoryStream（）;DESCryptoServiceProvider deskey = new DESCryptoServiceProvider（）;CryptoStream cstream = new CryptoStream（mstream, deskey.CreateEncryptor（rgbKey,rgbIv）, CryptoStreamMode.Write）;StreamWriter sw = new StreamWriter（cstream）;sw.WriteLine（data）;sw.Close（）;cstream.Close（）;byte[] bytes = mstream.ToArray（）;mstream.Close（）;return Convert.ToBase64String（bytes）;}public string Decrypt（string data）{string tmp;MemoryStream mstream = new MemoryStream（Convert.FromBase64String（data））;DESCryptoServiceProvider deskey = new DESCryptoServiceProvider（）;CryptoStream cstream = new CryptoStream（mstream, deskey.CreateDecryptor（rgbKey, rgbIv）, CryptoStreamMode.Read）;StreamReader sr = new StreamReader（cstream）;tmp = sr.ReadLine（）;sr.Close（）;cstream.Close（）;mstream.Close（）;return tmp;} #endregion}}

DES加密算法

using System;using System.Collections.Generic;using System.Text;using System.Security.Cryptography;using System.IO;namespace EncryptAndDecrypt{ public class TripleDesCrypt:IEncrytAndDecrypt{ private byte[] rgbKey; private byte[] rgbIv; public TripleDesCrypt（） { rgbKey = new byte[130]; rgbIv = new byte[130]; for （int i = 0; i < 130; i++） { rgbKey[i] = rgbIv[i] = （byte）（new Random（）.Next（1, 255））; }}#region IEncrytAndDecrypt 成员 public string Encrypt（string data）{TripleDESCryptoServiceProvider tripleDes=new TripleDESCryptoServiceProvider（）;MemoryStream mstream = new MemoryStream（）;CryptoStream cstream = new CryptoStream（mstream, tripleDes.CreateEncryptor（rgbKey, rgbIv）, CryptoStreamMode.Write）;StreamWriter sw = new StreamWriter（cstream）;sw.WriteLine（data）;cstream.Close（）;byte[] result = mstream.ToArray（）;mstream.Close（）;return Convert.ToBase64String（result）;}public string Decrypt（string data）{TripleDESCryptoServiceProvider tripleDes = new TripleDESCryptoServiceProvider（）;MemoryStream mstream = new MemoryStream（Convert.FromBase64String（data））;CryptoStream cstream = new CryptoStream（mstream, tripleDes.CreateDecryptor（rgbKey, rgbIv）, CryptoStreamMode.Read）;StreamReader sr = new StreamReader（cstream）;string result = sr.ReadLine（）;sr.Close（）;cstream.Close（）;mstream.Close（）;return result;} #endregion}}

TripleDES加密算法