using System;
	

	

		using System.Collections.Generic;
	

	

		using System.Linq;
	

	

		using System.Security.Cryptography;
	

	

		using System.Text;
	

	

		using System.Threading.Tasks;
	

	

		
	

	

		namespace AESTest
	

	

		{
	

	

		
	

	

		 class AES
	

	

		 {
	

	

		 //public static void Main()
	

	

		 //{
	

	

		 //    string original = "Here is some data to encrypt!";
	

	

		
	

	

		 //    // Create a new instance of the Aes
	

	

		 //    // class.  This generates a new key and initialization
	

	

		 //    // vector (IV).
	

	

		 //    using (Aes myAes = Aes.Create())
	

	

		 //    {
	

	

		
	

	

		 //        // Encrypt the string to an array of bytes.
	

	

		 //        byte[] encrypted = EncryptStringToBytes_Aes(original, myAes.Key, myAes.IV);
	

	

		
	

	

		 //        // Decrypt the bytes to a string.
	

	

		 //        string roundtrip = DecryptStringFromBytes_Aes(encrypted, myAes.Key, myAes.IV);
	

	

		
	

	

		 //        //Display the original data and the decrypted data.
	

	

		 //        Console.WriteLine("Original:   {0}", original);
	

	

		 //        Console.WriteLine("Round Trip: {0}", roundtrip);
	

	

		 //    }
	

	

		 //}
	

	

		 public static byte[] EncryptStringToBytes_Aes(string plainText, byte[] Key, byte[] IV)
	

	

		 {
	

	

		 // Check arguments.
	

	

		 if (plainText == null || plainText.Length <= 0)
	

	

		 throw new ArgumentNullException("plainText");
	

	

		 if (Key == null || Key.Length <= 0)
	

	

		 throw new ArgumentNullException("Key");
	

	

		 if (IV == null || IV.Length <= 0)
	

	

		 throw new ArgumentNullException("IV");
	

	

		 byte[] encrypted;
	

	

		
	

	

		 // Create an Aes object
	

	

		 // with the specified key and IV.
	

	

		 using (Aes aesAlg = Aes.Create())
	

	

		 {
	

	

		 aesAlg.Key = Key;
	

	

		 aesAlg.IV = IV;
	

	

		
	

	

		 // Create an encryptor to perform the stream transform.
	

	

		 ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
	

	

		
	

	

		 // Create the streams used for encryption.
	

	

		 using (MemoryStream msEncrypt = new MemoryStream())
	

	

		 {
	

	

		 using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
	

	

		 {
	

	

		 using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
	

	

		 {
	

	

		 //Write all data to the stream.
	

	

		 swEncrypt.Write(plainText);
	

	

		 }
	

	

		 encrypted = msEncrypt.ToArray();
	

	

		 }
	

	

		 }
	

	

		 }
	

	

		
	

	

		 // Return the encrypted bytes from the memory stream.
	

	

		 return encrypted;
	

	

		 }
	

	

		
	

	

		 public  static string DecryptStringFromBytes_Aes(byte[] cipherText, byte[] Key, byte[] IV)
	

	

		 {
	

	

		 // Check arguments.
	

	

		 if (cipherText == null || cipherText.Length <= 0)
	

	

		 throw new ArgumentNullException("cipherText");
	

	

		 if (Key == null || Key.Length <= 0)
	

	

		 throw new ArgumentNullException("Key");
	

	

		 if (IV == null || IV.Length <= 0)
	

	

		 throw new ArgumentNullException("IV");
	

	

		
	

	

		 // Declare the string used to hold
	

	

		 // the decrypted text.
	

	

		 string plaintext = null;
	

	

		
	

	

		 // Create an Aes object
	

	

		 // with the specified key and IV.
	

	

		 using (Aes aesAlg = Aes.Create())
	

	

		 {
	

	

		 aesAlg.Key = Key;
	

	

		 aesAlg.IV = IV;
	

	

		
	

	

		 // Create a decryptor to perform the stream transform.
	

	

		 ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
	

	

		
	

	

		 // Create the streams used for decryption.
	

	

		 using (MemoryStream msDecrypt = new MemoryStream(cipherText))
	

	

		 {
	

	

		 using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
	

	

		 {
	

	

		 using (StreamReader srDecrypt = new StreamReader(csDecrypt))
	

	

		 {
	

	

		
	

	

		 // Read the decrypted bytes from the decrypting stream
	

	

		 // and place them in a string.
	

	

		 plaintext = srDecrypt.ReadToEnd();
	

	

		 }
	

	

		 }
	

	

		 }
	

	

		 }
	

	

		
	

	

		 return plaintext;
	

	

		 }
	

	

		 }
	

	

		
	

	

		}
	

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