TripleDES in C# corresponds to DESede in Java

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/// <summary>
	/// TripleDES加密，key长度为16
	/// </summary>
	/// <param name="plainText">明文</param>
	/// <param name="key">密钥</param>
	/// <returns>TripleDES加密结果</returns>
	public static string EncryptData(string plainText, string key)
	{
    
    
		TripleDESCryptoServiceProvider Tripledes = new TripleDESCryptoServiceProvider();
		//Tripledes.Mode = CipherMode.ECB;
		//Tripledes.Padding = PaddingMode.PKCS7;
		byte[] b_input = Encoding.UTF8.GetBytes(plainText);
		byte[] b_key = Encoding.UTF8.GetBytes(key);
		MemoryStream tempStream = new MemoryStream();
		//rgbKey即用于对称算法的密钥、rgbIV即用于对称算法的初始化向量，这里均使用b_key
		CryptoStream encStream = new CryptoStream(tempStream, Tripledes.CreateEncryptor(b_key, b_key), CryptoStreamMode.Write);
		encStream.Write(b_input, 0, b_input.Length);
		encStream.Close();
		return Convert.ToBase64String(tempStream.ToArray());
	}

/// <summary>
	/// TripleDES解密，key长度为16
	/// </summary>
	/// <param name="input">TripleDES加密的结果</param>
	/// <param name="key">密钥</param>
	/// <returns>TripleDES解密结果</returns>
	public static string DecryptData(string input, string key)
	{
    
    
		TripleDESCryptoServiceProvider Tripledes = new TripleDESCryptoServiceProvider();
		byte[] b_input = Convert.FromBase64String(input);
		byte[] b_key = Encoding.UTF8.GetBytes(key);
		MemoryStream tempStream = new MemoryStream();
		//rgbKey即用于对称算法的密钥、rgbIV即用于对称算法的初始化向量，这里均使用b_key
		CryptoStream encStream = new CryptoStream(tempStream, Tripledes.CreateDecryptor(b_key, b_key), CryptoStreamMode.Write);
		encStream.Write(b_input, 0, b_input.Length);
		encStream.FlushFinalBlock();
		return Encoding.UTF8.GetString(tempStream.ToArray());
	}