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[GitHub/Stricted/SpeedportHybridControl.git] / SpeedportHybridControl.Implementations / Cryptography.cs

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace SpeedportHybridControl.Implementations {
	public static class Cryptography {
		private static string KEY = "8E16A57381AFDA47856682CEBE85DCF5982F59321AE28B2822C1C9E1FC481C50";
		private static string IV = "7CD37E78623793D4C4BB81DB73B08522";

		public static string Encrypt (string clearText) {
			byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
			string result;
			using (Aes encryptor = Aes.Create()) {
				if (Object.Equals(encryptor, null)) {
					result = null;
					return result;
				}

				encryptor.KeySize = 256;
				encryptor.BlockSize = 128;
				encryptor.Mode = CipherMode.CBC;
				encryptor.Padding = PaddingMode.PKCS7;
				encryptor.Key = util.HexToByte(KEY);
				encryptor.IV = util.HexToByte(IV);

				using (MemoryStream ms = new MemoryStream()) {
					using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write)) {
						cs.Write(clearBytes, 0, clearBytes.Length);
						cs.Close();
					}
					clearText = Convert.ToBase64String(ms.ToArray());
				}
			}
			result = clearText;
			return result;
		}

		public static string Decrypt (string cipherText) {
			byte[] cipherBytes = Convert.FromBase64String(cipherText);
			string result;
			using (Aes encryptor = Aes.Create()) {
				if (Object.Equals(encryptor, null)) {
					result = null;
					return result;
				}

				encryptor.KeySize = 256;
				encryptor.BlockSize = 128;
				encryptor.Mode = CipherMode.CBC;
				encryptor.Padding = PaddingMode.PKCS7;
				encryptor.Key = util.HexToByte(KEY);
				encryptor.IV = util.HexToByte(IV);
				
				using (MemoryStream ms = new MemoryStream()) {
					using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write)) {
						cs.Write(cipherBytes, 0, cipherBytes.Length);
						cs.Close();
					}
					cipherText = Encoding.Unicode.GetString(ms.ToArray());
				}
			}
			result = cipherText;
			return result;
		}
	}
}