Added an EncryptionHelper, can be used to store passwords.

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@1771 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

GreenshotPlugin/Core/EncryptionHelper.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Security.Cryptography;
+using System.IO;
+
+namespace GreenshotPlugin.Core {
+	public static class EncryptionHelper {
+		private const string RGBIV = "dlgjowejgogkklwj";
+		private const string KEY = "lsjvkwhvwujkagfauguwcsjgu2wueuff";
+
+		/// <summary>
+		/// A simply rijndael aes encryption, can be used to store passwords
+		/// </summary>
+		/// <param name="ClearText">the string to call upon</param>
+		/// <returns>an encryped string in base64 form</returns>
+		public static string Encrypt(this string ClearText) {
+			byte[] clearTextBytes = Encoding.UTF8.GetBytes(ClearText);
+
+			SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
+
+			using (MemoryStream ms = new MemoryStream()) {
+				byte[] rgbIV = Encoding.ASCII.GetBytes(RGBIV);
+				byte[] key = Encoding.ASCII.GetBytes(KEY);
+				CryptoStream cs = new CryptoStream(ms, rijn.CreateEncryptor(key, rgbIV), CryptoStreamMode.Write);
+
+				cs.Write(clearTextBytes, 0, clearTextBytes.Length);
+				return Convert.ToBase64String(ms.ToArray());
+			}
+		}
+
+		/// <summary>
+		/// A simply rijndael aes decryption, can be used to store passwords
+		/// </summary>
+		/// <param name="EncryptedText">a base64 encoded rijndael encrypted string</param>
+		/// <returns>Decrypeted text</returns>
+		public static string Decrypt(this string EncryptedText) {
+			byte[] encryptedTextBytes = Convert.FromBase64String(EncryptedText);
+
+			using (MemoryStream ms = new MemoryStream()) {
+				SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
+
+
+				byte[] rgbIV = Encoding.ASCII.GetBytes(RGBIV);
+				byte[] key = Encoding.ASCII.GetBytes(KEY);
+
+				CryptoStream cs = new CryptoStream(ms, rijn.CreateDecryptor(key, rgbIV),
+				CryptoStreamMode.Write);
+
+				cs.Write(encryptedTextBytes, 0, encryptedTextBytes.Length);
+
+				return Encoding.UTF8.GetString(ms.ToArray());
+			}
+		}
+	}
+}

GreenshotPlugin/GreenshotPlugin.csproj

@@ -197,6 +197,7 @@
     <Compile Include="Core\CacheHelper.cs" />
     <Compile Include="Core\CoreConfiguration.cs" />
     <Compile Include="Core\CredentialsHelper.cs" />
+    <Compile Include="Core\EncryptionHelper.cs" />
     <Compile Include="Core\InterfaceUtils.cs" />
     <Compile Include="Core\DisplayKeyAttribute.cs" />
     <Compile Include="Core\EmailConfigHelper.cs" />