知识大全 C# 对称算法,加密解密类

Posted 2022-07-17 知

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　　模块编号包含作者审核编写日期描述提供对称加密摘要算法

　　如果模块有修改则每次修改添加以下注释 Log编号修改作者修改日期修改描述

　　using System Text; using System IO; using System; using System Text RegularExpressions; using System Security Cryptography;

　　namespace LHCHIP Common /**//// <summary> /// 对称加密算法类 /// </summary> public class DecryptEncrypt /**//// <summary> /// 返回自身的一个类 /// </summary> public static DecryptEncrypt MyDecryptEncrypt get return new DecryptEncrypt();

　　private SymmetricAlgorithm mobjCryptoService; private string Key;

　　/**//// <summary> /// 对称加密类的构造函数 /// </summary> internal DecryptEncrypt() mobjCryptoService = new RijndaelManaged(); Key = rrp(%&h x H$jgsfgfsI Ftma &fvHrr&& *h%( lJ$lhj!y &(*jkPer a ;

　　/**//// <summary> /// 获得密钥 /// </summary> /// <returns>密钥</returns> private byte[] GetLegalKey() string _TempKey = Key; mobjCryptoService GenerateKey(); byte[] bytTemp = mobjCryptoService Key; int KeyLength = bytTemp Length; if (_TempKey Length > KeyLength) _TempKey = _TempKey Substring( KeyLength); else if (_TempKey Length < KeyLength) _TempKey = _TempKey PadRight(KeyLength ); return ASCIIEncoding ASCII GetBytes(_TempKey); /**//// <summary> /// 获得初始向量IV /// </summary> /// <returns>初试向量IV</returns> private byte[] GetLegalIV() string _TempIV = @afetj*Ghg !rNIfsgr GUqd gsrb#GG HBh(urjj HJ($jhWk &!hjjri%$hjk ; mobjCryptoService GenerateIV(); byte[] bytTemp = mobjCryptoService IV; int IVLength = bytTemp Length; if (_TempIV Length > IVLength) _TempIV = _TempIV Substring( IVLength); else if (_TempIV Length < IVLength) _TempIV = _TempIV PadRight(IVLength ); return ASCIIEncoding ASCII GetBytes(_TempIV);

　　/**//// <summary> /// 加密方法 /// </summary> /// <param name= Source >待加密的串</param> /// <returns>经过加密的串</returns> public string Encrypto(string Source) byte[] bytIn = UTF Encoding UTF GetBytes(Source); MemoryStream ms = new MemoryStream(); mobjCryptoService Key = GetLegalKey(); mobjCryptoService IV = GetLegalIV(); //创建对称加密器对象 ICryptoTransform encrypto = mobjCryptoService CreateEncryptor(); //定义将数据流链接到加密转换的流 CryptoStream cs = new CryptoStream(ms encrypto CryptoStreamMode Write); cs Write(bytIn bytIn Length); cs FlushFinalBlock(); ms Close(); byte[] bytOut = ms ToArray(); return Convert ToBase String(bytOut);

　　/**//// <summary> /// 解密方法 /// </summary> /// <param name= Source >待解密的串</param> /// <returns>经过解密的串</returns> public string Decrypto(string Source) byte[] bytIn = Convert FromBase String(Source); MemoryStream ms = new MemoryStream(bytIn bytIn Length); mobjCryptoService Key = GetLegalKey(); mobjCryptoService IV = GetLegalIV(); //创建对称解密器对象 ICryptoTransform encrypto = mobjCryptoService CreateDecryptor(); //定义将数据流链接到加密转换的流 CryptoStream cs = new CryptoStream(ms encrypto CryptoStreamMode Read); StreamReader sr = new StreamReader(cs); return sr ReadToEnd();

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