TripleDES类 3des加密算法实现
2006-10-12 11:00 Rainbow 阅读(2311) 评论(1) 编辑 收藏 举报
可以加密字符串,也可以加密字节数组。
采用3-des加密算法,加密键只能是16byte(128位)或者是24byte(192位)的,指定的键不仅有长度上的要求,还不能是个弱键
( 注:DES 算法使用 56 位(7 字节)的密钥)
//调用方法
// 指定加密键
string key = "yygmldcsjmdsthcg"; //16byte
CryptionData cd = new CryptionData(key);
string testStr = "SpNumber + “$”+ UserNumber + “$”+ ServiceTag + “$”+ AccessTime";
string result = cd.EncryptionStringData(testStr); // result 已经经过base64编码
string encodingStr = HttpUtility.UrlEncode(result, System.Text.Encoding.GetEncoding("GB2312"));
//TripleDES类代码
using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Web;
using System.Windows.Forms;
public class CryptionData
{
// The length of Encryptionstring should be 24 byte and not be a weak key
private string EncryptionString;
// The length of initialization vector should be 8 byte
private static Byte[] EncryptionIV = Encoding.Default.GetBytes("abcdefgh");
/// <summary>
/// Constructor
/// </summary>
public CryptionData()
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="EncryptionString">SecureKey</param>
public CryptionData(string EncryptionString)
{
this.EncryptionString = EncryptionString;
}
/// <summary>
/// Encryption method for byte array
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>byte array</returns>
public byte[] EncryptionByteData(byte[] SourceData)
{
byte[] returnData = null;
try
{
// Create TripleDESCryptoServiceProvider object
TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();
// Set SecureKey and IV of desProvider
byte[] byteKey = Encoding.Default.GetBytes(EncryptionString);
desProvider.Key = byteKey;
desProvider.IV = EncryptionIV;
// A MemoryStream object
MemoryStream ms = new MemoryStream();
// Create Encryptor
ICryptoTransform encrypto = desProvider.CreateEncryptor();
// Create CryptoStream object
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
// Encrypt SourceData
cs.Write(SourceData,0,SourceData.Length);
cs.FlushFinalBlock();
// Get Encryption result
returnData = ms.ToArray();
}
catch(Exception ex)
{
throw ex;
}
return returnData;
}
/// <summary>
/// Decryption method for byte array
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>byte array</returns>
public byte[] DecryptionByteData(byte[] SourceData)
{
byte[] returnData = null;
try
{
// Create TripleDESCryptoServiceProvider object
TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();
// Set SecureKey and IV of desProvider
byte[] byteKey = Encoding.Default.GetBytes(EncryptionString);
desProvider.Key = byteKey;
desProvider.IV = EncryptionIV;
// A MemoryStream object
MemoryStream ms = new MemoryStream();
// Create Decryptor
ICryptoTransform encrypto = desProvider.CreateDecryptor();
// Create CryptoStream object
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
// Decrypt SourceData
cs.Write(SourceData, 0, SourceData.Length);
cs.FlushFinalBlock();
// Get Decryption result
returnData = ms.ToArray();
}
catch(Exception ex)
{
throw ex;
}
return returnData;
}
/// <summary>
/// Encryption method for string
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>string</returns>
public string EncryptionStringData(string SourceData)
{
try
{
// Convert source data from string to byte array
byte[] SourData = Encoding.Default.GetBytes(SourceData);
// Encrypt byte array
byte[] retData = EncryptionByteData(SourData);
// Convert encryption result from byte array to Base64String
return Convert.ToBase64String(retData, 0, retData.Length);
}
catch(Exception ex)
{
throw ex;
}
}
/// <summary>
/// Decryption method for string
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>string</returns>
public string DecryptionStringdata(string SourceData)
{
try
{
// Convert source data from Base64String to byte array
byte[] SourData = Convert.FromBase64String(SourceData);
// Decrypt byte array
byte[] retData = DecryptionByteData(SourData);
// Convert Decryption result from byte array to string
return Encoding.Default.GetString(retData, 0, retData.Length);
}
catch(Exception ex)
{
throw ex;
}
}
}
采用3-des加密算法,加密键只能是16byte(128位)或者是24byte(192位)的,指定的键不仅有长度上的要求,还不能是个弱键
( 注:DES 算法使用 56 位(7 字节)的密钥)
//调用方法
// 指定加密键
string key = "yygmldcsjmdsthcg"; //16byte
CryptionData cd = new CryptionData(key);
string testStr = "SpNumber + “$”+ UserNumber + “$”+ ServiceTag + “$”+ AccessTime";
string result = cd.EncryptionStringData(testStr); // result 已经经过base64编码
string encodingStr = HttpUtility.UrlEncode(result, System.Text.Encoding.GetEncoding("GB2312"));
//TripleDES类代码
using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Web;
using System.Windows.Forms;
public class CryptionData
{
// The length of Encryptionstring should be 24 byte and not be a weak key
private string EncryptionString;
// The length of initialization vector should be 8 byte
private static Byte[] EncryptionIV = Encoding.Default.GetBytes("abcdefgh");
/// <summary>
/// Constructor
/// </summary>
public CryptionData()
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="EncryptionString">SecureKey</param>
public CryptionData(string EncryptionString)
{
this.EncryptionString = EncryptionString;
}
/// <summary>
/// Encryption method for byte array
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>byte array</returns>
public byte[] EncryptionByteData(byte[] SourceData)
{
byte[] returnData = null;
try
{
// Create TripleDESCryptoServiceProvider object
TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();
// Set SecureKey and IV of desProvider
byte[] byteKey = Encoding.Default.GetBytes(EncryptionString);
desProvider.Key = byteKey;
desProvider.IV = EncryptionIV;
// A MemoryStream object
MemoryStream ms = new MemoryStream();
// Create Encryptor
ICryptoTransform encrypto = desProvider.CreateEncryptor();
// Create CryptoStream object
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
// Encrypt SourceData
cs.Write(SourceData,0,SourceData.Length);
cs.FlushFinalBlock();
// Get Encryption result
returnData = ms.ToArray();
}
catch(Exception ex)
{
throw ex;
}
return returnData;
}
/// <summary>
/// Decryption method for byte array
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>byte array</returns>
public byte[] DecryptionByteData(byte[] SourceData)
{
byte[] returnData = null;
try
{
// Create TripleDESCryptoServiceProvider object
TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();
// Set SecureKey and IV of desProvider
byte[] byteKey = Encoding.Default.GetBytes(EncryptionString);
desProvider.Key = byteKey;
desProvider.IV = EncryptionIV;
// A MemoryStream object
MemoryStream ms = new MemoryStream();
// Create Decryptor
ICryptoTransform encrypto = desProvider.CreateDecryptor();
// Create CryptoStream object
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
// Decrypt SourceData
cs.Write(SourceData, 0, SourceData.Length);
cs.FlushFinalBlock();
// Get Decryption result
returnData = ms.ToArray();
}
catch(Exception ex)
{
throw ex;
}
return returnData;
}
/// <summary>
/// Encryption method for string
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>string</returns>
public string EncryptionStringData(string SourceData)
{
try
{
// Convert source data from string to byte array
byte[] SourData = Encoding.Default.GetBytes(SourceData);
// Encrypt byte array
byte[] retData = EncryptionByteData(SourData);
// Convert encryption result from byte array to Base64String
return Convert.ToBase64String(retData, 0, retData.Length);
}
catch(Exception ex)
{
throw ex;
}
}
/// <summary>
/// Decryption method for string
/// </summary>
/// <param name="SourceData">source data</param>
/// <returns>string</returns>
public string DecryptionStringdata(string SourceData)
{
try
{
// Convert source data from Base64String to byte array
byte[] SourData = Convert.FromBase64String(SourceData);
// Decrypt byte array
byte[] retData = DecryptionByteData(SourData);
// Convert Decryption result from byte array to string
return Encoding.Default.GetString(retData, 0, retData.Length);
}
catch(Exception ex)
{
throw ex;
}
}
}