C# des 加密 解密

代码

public class EncryptDecrypt
{
public static string EncryptString(string mes, string key)
{
byte[] inputBytes = ASCIIEncoding.UTF8.GetBytes(mes);

MemoryStream outputStream = new MemoryStream();
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = ASCIIEncoding.ASCII.GetBytes(key);
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
ICryptoTransform desencrypt = des.CreateEncryptor();
CryptoStream cryptostream = new CryptoStream(outputStream, desencrypt, CryptoStreamMode.Write);
cryptostream.Write(inputBytes, 0, inputBytes.Length);
cryptostream.FlushFinalBlock();
cryptostream.Close();

string outputString = Convert.ToBase64String(outputStream.ToArray());
return outputString;
}

public static string DecryptString(string mes, string key)
{
byte[] inputBytes = Convert.FromBase64String(mes);

MemoryStream outputStream = new MemoryStream();
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = ASCIIEncoding.ASCII.GetBytes(key);
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
ICryptoTransform desencrypt = des.CreateDecryptor();
CryptoStream cryptostream = new CryptoStream(outputStream, desencrypt, CryptoStreamMode.Write);
cryptostream.Write(inputBytes, 0, inputBytes.Length);
cryptostream.FlushFinalBlock();
cryptostream.Close();

string outputString = ASCIIEncoding.UTF8.GetString(outputStream.ToArray());
return outputString;
}
}