——————————————————————————MD5加密方式————————————————————————————-—
//tostring中的参数标示用何种格式来格式化字符串，其中X标示16进制，2表示两位 // string str1=byte.ToString("x");//str1="0"; // string str2=byte.ToString("x2");//str2="00";
public static string GetMD5Encording(string str) {
MD5 md5 = new MD5CryptoServiceProvider(); byte[] _byte = Encoding.Default.GetBytes(str); byte[] _byteRst = md5.ComputeHash(_byte); StringBuilder SBuilder = new StringBuilder(); for (int i = 0; i < _byteRst.Length; i++) { SBuilder.Append(_byteRst[i].ToString("x2")); } return SBuilder.ToString(); } }
————————————————————————————对称加密—————————————————————————————
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(%&h70x89H$jgsfgfsI0456Ftma81&fvHrr&&76*h%(12lJ$lhj!y6&(*jkPer44a";
}
/** <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(0, 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*Ghg7!rNIfsgr95GUqd9gsrb#GG7HBh(urjj6HJ($jhWk7&!hjjri%$hjk";
mobjCryptoService.GenerateIV();
byte[] bytTemp = mobjCryptoService.IV;
int IVLength = bytTemp.Length;
if (_TempIV.Length > IVLength)
_TempIV = _TempIV.Substring(0, 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 = UTF8Encoding.UTF8.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, 0, bytIn.Length);
cs.FlushFinalBlock();
ms.Close();
byte[] bytOut = ms.ToArray();
return Convert.ToBase64String(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.FromBase64String(Source);
MemoryStream ms = new MemoryStream(bytIn, 0, 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();
}
}
}
————————————————————————DES加密———————————————————————————————— using System; using System.Security.Cryptography; using System.IO; using System.Text; public class EncryptStringDES { public static void Main(String[] args) { if (args.Length < 1) { Console.WriteLine("Usage: des_demo <string-to-encrypt>", args[0]); return; } // 使用UTF8函数加密输入参数 UTF8Encoding utf8Encoding = new UTF8Encoding(); byte[] inputByteArray = utf8Encoding.GetBytes(args[0].ToCharArray()); // 方式一：调用默认的DES实现方法DES_CSP. DES des = DES.Create(); // 方式二：直接使用DES_CSP()实现DES的实体 //DES_CSP DES = new DES_CSP(); // 初始化DES加密的密钥和一个随机的、8比特的初始化向量(IV) Byte[] key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef }; Byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef }; des.Key = key; des.IV = IV; // 建立加密流 SymmetricStreamEncryptor sse = des.CreateEncryptor(); // 使用CryptoMemoryStream方法获取加密过程的输出 CryptoMemoryStream cms = new CryptoMemoryStream(); // 将SymmetricStreamEncryptor流中的加密数据输出到CryptoMemoryStream中 sse.SetSink(cms); // 加密完毕，将结果输出到控制台 sse.Write(inputByteArray); sse.CloseStream(); // 获取加密数据 byte[] encryptedData = cms.Data; // 输出加密后结果 Console.WriteLine("加密结果："); for (int i = 0; i < encryptedData.Length; i++) { Console.Write("{0:X2} ", encryptedData[i]); } Console.WriteLine(); //上面演示了如何进行加密，下面演示如何进行解密 SymmetricStreamDecryptor ssd = des.CreateDecryptor(); cms = new CryptoMemoryStream(); ssd.SetSink(cms); ssd.Write(encryptedData); ssd.CloseStream(); byte[] decryptedData = cms.Data; char[] decryptedCharArray = utf8Encoding.GetChars(decryptedData); Console.WriteLine("解密后数据："); Console.Write(decryptedCharArray); Console.WriteLine(); } }
