//******************************************************************************************************//  Common.cs - Gbtc////  Copyright © 2010, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the Eclipse Public License -v 1.0 (the "License"); you may//  not use this file except in compliance with the License. You may obtain a copy of the License at:////      http://www.opensource.org/licenses/eclipse-1.0.php////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  05/24/2011 - J. Ritchie Carroll//       Generated original version of source code.////****************************************************************************************************** using Microsoft.Win32;using System.Security.Cryptography; namespace GSF.TimeSeries.Transport{    /// <summary>    /// Common static methods and extensions for transport library.    /// </summary>    public static class Common    {        // Flag that determines if managed encryption wrappers can be used over FIPS-compliant algorithms if desired.        private static readonly bool s_canUseManagedEncryption;         // Static Constructor        static Common()        {            // Determine if the operating system configuration to set to use FIPS-compliant algorithms            s_canUseManagedEncryption = true; //(Registry.GetValue(fipsKeyNew, "Enabled", 0) ?? Registry.GetValue(fipsKeyOld, "FipsAlgorithmPolicy", 0)).ToString() == "0";        }         /// <summary>        /// Gets flag that determines if managed encryption can be used.        /// </summary>        public static bool CanUseManagedEncryption        {            get            {                return s_canUseManagedEncryption;            }        }         /// <summary>        /// Gets an AES symmetric algorithm to use for encryption or decryption.        /// </summary>        public static SymmetricAlgorithm SymmetricAlgorithm        {            get            {                Aes symmetricAlgorithm;                 if (s_canUseManagedEncryption)                    symmetricAlgorithm = new AesManaged();                else                    symmetricAlgorithm = new AesCryptoServiceProvider();                 symmetricAlgorithm.KeySize = 256;                 return symmetricAlgorithm;            }        }         /// <summary>        /// Returns <c>true</c> if <see cref="ServerResponse"/> code is for a solicited <see cref="ServerCommand"/>.        /// </summary>        /// <remarks>        /// Only the <see cref="ServerResponse.Succeeded"/> and <see cref="ServerResponse.Failed"/> response codes are from solicited server commands.        /// </remarks>        /// <param name="responseCode"><see cref="ServerResponse"/> code to test.</param>        /// <returns><c>true</c> if <see cref="ServerResponse"/> code is for a solicited <see cref="ServerCommand"/>; otherwise <c>false</c>.</returns>        public static bool IsSolicited(this ServerResponse responseCode)        {            // Only the succeeded and failed response codes are from solicited commands            if (responseCode == ServerResponse.Succeeded || responseCode == ServerResponse.Failed)                return true;             return false;        }    }}