1 files changed, 77 insertions, 0 deletions
diff --git a/Gestor.Common/Gestor.Common.Helpers/EncryptionHelper.cs b/Gestor.Common/Gestor.Common.Helpers/EncryptionHelper.cs
new file mode 100644
index 0000000..5b982d0
--- /dev/null
+++ b/Gestor.Common/Gestor.Common.Helpers/EncryptionHelper.cs
@@ -0,0 +1,77 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Gestor.Common.Helpers;
+
+public static class EncryptionHelper
+{
+	private static readonly byte[] Salt = new byte[16]
+	{
+		38, 220, 255, 0, 173, 237, 122, 238, 197, 254,
+		7, 175, 77, 8, 34, 60
+	};
+
+	private static readonly string EncryptionKey = $"aGG3r{1012}#w3BDz$";
+
+	public static string Encrypt(this string plain)
+	{
+		return Convert.ToBase64String(Encoding.UTF8.GetBytes(plain).EncryptBytes());
+	}
+
+	public static byte[] EncryptBytes(this byte[] plainTextBytes)
+	{
+		using Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(EncryptionKey, Salt);
+		using Rijndael rijndael = Rijndael.Create();
+		rijndael.Key = rfc2898DeriveBytes.GetBytes(32);
+		rijndael.IV = rfc2898DeriveBytes.GetBytes(16);
+		using MemoryStream memoryStream = new MemoryStream();
+		using CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write);
+		cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
+		cryptoStream.FlushFinalBlock();
+		return memoryStream.ToArray();
+	}
+
+	public static string Decrypt(this string cipher)
+	{
+		if (string.IsNullOrEmpty(cipher))
+		{
+			return null;
+		}
+		try
+		{
+			byte[] array = Convert.FromBase64String(cipher);
+			if (array.Length < 16)
+			{
+				return cipher;
+			}
+			byte[] array2 = array.DecryptBytes();
+			return (array2 == null) ? cipher : Encoding.UTF8.GetString(array2);
+		}
+		catch (Exception)
+		{
+			return cipher;
+		}
+	}
+
+	public static byte[] DecryptBytes(this byte[] plainTextBytes)
+	{
+		try
+		{
+			using Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(EncryptionKey, Salt);
+			using Rijndael rijndael = Rijndael.Create();
+			rijndael.Key = rfc2898DeriveBytes.GetBytes(32);
+			rijndael.IV = rfc2898DeriveBytes.GetBytes(16);
+			using MemoryStream memoryStream = new MemoryStream();
+			using CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndael.CreateDecryptor(), CryptoStreamMode.Write);
+			cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
+			cryptoStream.FlushFinalBlock();
+			return memoryStream.ToArray();
+		}
+		catch (Exception)
+		{
+			return null;
+		}
+	}
+}