1 files changed, 106 insertions, 0 deletions
diff --git a/Codemerx/Gestor.Common/Gestor.Common.Helpers/EncryptionHelper.cs b/Codemerx/Gestor.Common/Gestor.Common.Helpers/EncryptionHelper.cs
new file mode 100644
index 0000000..b2102d2
--- /dev/null
+++ b/Codemerx/Gestor.Common/Gestor.Common.Helpers/EncryptionHelper.cs
@@ -0,0 +1,106 @@
+using System;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Gestor.Common.Helpers
+{
+	public static class EncryptionHelper
+	{
+		private readonly static byte[] Salt;
+
+		private readonly static string EncryptionKey;
+
+		static EncryptionHelper()
+		{
+			EncryptionHelper.Salt = new byte[] { 38, 220, 255, 0, 173, 237, 122, 238, 197, 254, 7, 175, 77, 8, 34, 60 };
+			EncryptionHelper.EncryptionKey = string.Format("aGG3r{0}#w3BDz$", 1012);
+		}
+
+		public static string Decrypt(this string cipher)
+		{
+			string str;
+			if (string.IsNullOrEmpty(cipher))
+			{
+				return null;
+			}
+			try
+			{
+				byte[] numArray = Convert.FromBase64String(cipher);
+				if ((int)numArray.Length >= 16)
+				{
+					byte[] numArray1 = numArray.DecryptBytes();
+					str = (numArray1 == null ? cipher : Encoding.UTF8.GetString(numArray1));
+				}
+				else
+				{
+					str = cipher;
+				}
+			}
+			catch (Exception exception)
+			{
+				str = cipher;
+			}
+			return str;
+		}
+
+		public static byte[] DecryptBytes(this byte[] plainTextBytes)
+		{
+			byte[] array;
+			try
+			{
+				using (Rfc2898DeriveBytes rfc2898DeriveByte = new Rfc2898DeriveBytes(EncryptionHelper.EncryptionKey, EncryptionHelper.Salt))
+				{
+					using (Rijndael bytes = Rijndael.Create())
+					{
+						bytes.Key = rfc2898DeriveByte.GetBytes(32);
+						bytes.IV = rfc2898DeriveByte.GetBytes(16);
+						using (MemoryStream memoryStream = new MemoryStream())
+						{
+							using (CryptoStream cryptoStream = new CryptoStream(memoryStream, bytes.CreateDecryptor(), CryptoStreamMode.Write))
+							{
+								cryptoStream.Write(plainTextBytes, 0, (int)plainTextBytes.Length);
+								cryptoStream.FlushFinalBlock();
+								array = memoryStream.ToArray();
+							}
+						}
+					}
+				}
+			}
+			catch (Exception exception)
+			{
+				array = null;
+			}
+			return array;
+		}
+
+		public static string Encrypt(this string plain)
+		{
+			return Convert.ToBase64String(Encoding.UTF8.GetBytes(plain).EncryptBytes());
+		}
+
+		public static byte[] EncryptBytes(this byte[] plainTextBytes)
+		{
+			byte[] array;
+			using (Rfc2898DeriveBytes rfc2898DeriveByte = new Rfc2898DeriveBytes(EncryptionHelper.EncryptionKey, EncryptionHelper.Salt))
+			{
+				using (Rijndael bytes = Rijndael.Create())
+				{
+					bytes.Key = rfc2898DeriveByte.GetBytes(32);
+					bytes.IV = rfc2898DeriveByte.GetBytes(16);
+					using (MemoryStream memoryStream = new MemoryStream())
+					{
+						using (CryptoStream cryptoStream = new CryptoStream(memoryStream, bytes.CreateEncryptor(), CryptoStreamMode.Write))
+						{
+							cryptoStream.Write(plainTextBytes, 0, (int)plainTextBytes.Length);
+							cryptoStream.FlushFinalBlock();
+							array = memoryStream.ToArray();
+						}
+					}
+				}
+			}
+			return array;
+		}
+	}
+}
+\ No newline at end of file