using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
namespace BitEncrypt
{
public class MD5
{
// 在此處添加更多操作並使用 [OperationContract] 標記它們
#region MD5加密
/// <summary>
/// MD5加密
/// </summary>
/// <param name="strSource">需要加密的字符串</param>
/// <returns>MD5加密後的字符串</returns>
public static string Md5Encrypt(string strSource)
{
//把字符串放到byte數組中
byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
//建立加密對象的密鑰和偏移量
byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定義偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定義密鑰
//實例DES加密類
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = iv;
mobjCryptoService.IV = key;
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
//實例MemoryStream流加密密文件
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
string strOut = System.Convert.ToBase64String(ms.ToArray());
return strOut;
}
#endregion
#region MD5解密
/// <summary>
/// MD5解密
/// </summary>
/// <param name="Source">需要解密的字符串</param>
/// <returns>MD5解密後的字符串</returns>
public static string Md5Decrypt(string Source)
{
//將解密字符串轉換成字節數組
byte[] bytIn = System.Convert.FromBase64String(Source);
//給出解密的密鑰和偏移量，密鑰和偏移量必須與加密時的密鑰和偏移量相同
byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定義偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定義密鑰
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = iv;
mobjCryptoService.IV = key;
//實例流進行解密
System.IO.MemoryStream ms = new System.IO.MemoryStream(bytIn, 0, bytIn.Length);
ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
StreamReader strd = new StreamReader(cs, Encoding.Default);
return strd.ReadToEnd();
}
#endregion
}
}