Squashed 'FSI.Lib/' content from commit dceb500

git-subtree-dir: FSI.Lib
git-subtree-split: dceb5008a2176c2b8ab5e55a73b1c25d31a7f841

FSI.Lib/DeEncryptString/DeEncrypt.cs

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+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace FSI.Lib.DeEncryptString
+{
+    public static class DeEncrypt
+    {
+        /// <summary>
+        /// Encrypts the string.
+        /// </summary>
+        /// <param name="clearText">The clear text.</param>
+        /// <param name="Key">The key.</param>
+        /// <param name="IV">The IV.</param>
+        /// <returns></returns>
+        private static byte[] CryptString(byte[] clearText, byte[] Key, byte[] IV)
+        {
+            MemoryStream ms = new MemoryStream();
+            Rijndael alg = Rijndael.Create();
+            alg.Key = Key;
+            alg.IV = IV;
+            CryptoStream cs = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write);
+            cs.Write(clearText, 0, clearText.Length);
+            cs.Close();
+            byte[] encryptedData = ms.ToArray();
+            return encryptedData;
+        }
+
+        /// <summary>
+        /// Encrypts the string.
+        /// </summary>
+        /// <param name="clearText">The clear text.</param>
+        /// <param name="Password">The password.</param>
+        /// <returns></returns>
+        public static string CryptString(string clearText, string Password)
+        {
+            byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
+            PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
+            byte[] encryptedData = CryptString(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
+            return Convert.ToBase64String(encryptedData);
+        }
+
+        /// <summary>
+        /// Decrypts the string.
+        /// </summary>
+        /// <param name="cipherData">The cipher data.</param>
+        /// <param name="Key">The key.</param>
+        /// <param name="IV">The IV.</param>
+        /// <returns></returns>
+        private static byte[] DecryptString(byte[] cipherData, byte[] Key, byte[] IV)
+        {
+            MemoryStream ms = new MemoryStream();
+            var alg = Rijndael.Create();
+            alg.Key = Key;
+            alg.IV = IV;
+            CryptoStream cs = new CryptoStream(ms, alg.CreateDecryptor(), CryptoStreamMode.Write);
+            cs.Write(cipherData, 0, cipherData.Length);
+            cs.Close();
+            byte[] decryptedData = ms.ToArray();
+            return decryptedData;
+        }
+
+        /// <summary>
+        /// Decrypts the string.
+        /// </summary>
+        /// <param name="cipherText">The cipher text.</param>
+        /// <param name="Password">The password.</param>
+        /// <returns></returns>
+        public static string DecryptString(string cipherText, string Password)
+        {
+            byte[] cipherBytes = Convert.FromBase64String(cipherText);
+            PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
+            byte[] decryptedData = DecryptString(cipherBytes, pdb.GetBytes(32), pdb.GetBytes(16));
+            return System.Text.Encoding.Unicode.GetString(decryptedData);
+        }
+
+    }
+}