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描述提供对称加密摘要算法
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using SystemText;
using SystemIO;
using System;
using SystemTextRegularExpressions;
using SystemSecurityCryptography;
namespace LHCHIPCommon
{
/**//// <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(%&hxH$jgsfgfsIFtma&fvHrr&&*h%(lJ$lhj!y&(*jkPera;
}
/**//// <summary>
/// 获得密钥
/// </summary>
/// <returns>密钥</returns>
private byte[] GetLegalKey()
{
string _TempKey = Key;
mobjCryptoServiceGenerateKey();
byte[] bytTemp = mobjCryptoServiceKey;
int KeyLength = bytTempLength;
if (_TempKeyLength > KeyLength)
_TempKey = _TempKeySubstring( KeyLength);
else if (_TempKeyLength < KeyLength)
_TempKey = _TempKeyPadRight(KeyLength );
return ASCIIEncodingASCIIGetBytes(_TempKey);
}
/**//// <summary>
/// 获得初始向量IV
/// </summary>
/// <returns>初试向量IV</returns>
private byte[] GetLegalIV()
{
string _TempIV = @afetj*Ghg!rNIfsgrGUqdgsrb#GGHBh(urjjHJ($jhWk&!hjjri%$hjk;
mobjCryptoServiceGenerateIV();
byte[] bytTemp = mobjCryptoServiceIV;
int IVLength = bytTempLength;
if (_TempIVLength > IVLength)
_TempIV = _TempIVSubstring( IVLength);
else if (_TempIVLength < IVLength)
_TempIV = _TempIVPadRight(IVLength );
return ASCIIEncodingASCIIGetBytes(_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 = UTFEncodingUTFGetBytes(Source);
MemoryStream ms = new MemoryStream();
mobjCryptoServiceKey = GetLegalKey();
mobjCryptoServiceIV = GetLegalIV();
//创建对称加密器对象
ICryptoTransform encrypto = mobjCryptoServiceCreateEncryptor();
//定义将数据流链接到加密转换的流
CryptoStream cs = new CryptoStream(ms encrypto CryptoStreamModeWrite);
csWrite(bytIn bytInLength);
csFlushFinalBlock();
msClose();
byte[] bytOut = msToArray();
return ConvertToBaseString(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 = ConvertFromBaseString(Source);
MemoryStream ms = new MemoryStream(bytIn bytInLength);
mobjCryptoServiceKey = GetLegalKey();
mobjCryptoServiceIV = GetLegalIV();
//创建对称解密器对象
ICryptoTransform encrypto = mobjCryptoServiceCreateDecryptor();
//定义将数据流链接到加密转换的流
CryptoStream cs = new CryptoStream(ms encrypto CryptoStreamModeRead);
StreamReader sr = new StreamReader(cs);
return srReadToEnd();
}
}
}
