using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Web;
namespace Encryption.App_Code
{
/// <summary>
/// Add password class
/// </summary>
public class Encryption
{
/// <summary>
/// encryption
/// </summary>
/// <param name="inputString"></param>
/// <returns></returns>
public static string DesEncrypt(string inputString)
{
return DesEncrypt(inputString, Key);
}
/// <summary>
/// decryption
/// </summary>
/// <param name="inputString"></param>
/// <returns></returns>
public static string DesDecrypt(string inputString)
{
return DesDecrypt(inputString, Key);
}
/// <summary>
/// The key
/// </summary>
private static string Key
{
get
{
return "hongye10";
}
}
/// <summary>
/// Encrypted string
/// Pay attention to : The key must be 8 bits
/// </summary>
/// <param name="strText"> string </param>
/// <param name="encryptKey"> The key </param>
/// <param name="encryptKey"> Returns the encrypted string </param>
public static string DesEncrypt(string inputString, string encryptKey)
{
byte[] byKey = null;
byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.UTF8.GetBytes(inputString);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
catch (System.Exception error)
{
//return error.Message;
return null;
}
}
/// <summary>
/// Decrypt string
/// </summary>
/// <param name="this.inputString"> A sealed string </param>
/// <param name="decryptKey"> The key </param>
/// <param name="decryptKey"> Returns the decrypted string </param>
public static string DesDecrypt(string inputString, string decryptKey)
{
byte[] byKey = null;
byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
byte[] inputByteArray = new Byte[inputString.Length];
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(inputString);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = new System.Text.UTF8Encoding();
return encoding.GetString(ms.ToArray());
}
catch (System.Exception error)
{
//return error.Message;
return null;
}
}
}
}