MD5加密

 

简易：

MD5 md=MD5.Create();
byte[] by = Encoding.Default.GetBytes(tbox1.Text);
byte[] by2= md.ComputeHash(by);
string s = "";
for (int i = 0; i < by2.Length; i++)
{
s += by2[i].ToString("x2");
}
tbox2.Text = s;
md.Clear();

 

看不懂的：

class Class1
{
// 在此处添加更多操作并使用 [OperationContract] 标记它们
#region MD5加密
/// <summary>
/// MD5加密
/// </summary>
/// <param name="strSource">需要加密的字符串</param>
/// <returns>MD5加密后的字符串</returns>
[OperationContract]
public string Md5Encrypt(string strSource)
{
//把字符串放到byte数组中
byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
//建立加密对象的密钥和偏移量
byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
//实例DES加密类
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = iv;
mobjCryptoService.IV = key;
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
//实例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解密后的字符串</returns>
[OperationContract]
public string Md5Decrypt(string Source)
{
//将解密字符串转换成字节数组
byte[] bytIn = System.Convert.FromBase64String(Source);
//给出解密的密钥和偏移量，密钥和偏移量必须与加密时的密钥和偏移量相同
byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = iv;
mobjCryptoService.IV = key;
//实例流进行解密
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
}