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Technosoftware/DaAeHdaClient.Com/ApplicationInstance.cs

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+#region Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
+//-----------------------------------------------------------------------------
+// Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
+// Web: https://www.technosoftware.com 
+// 
+// The source code in this file is covered under a dual-license scenario:
+//   - Owner of a purchased license: SCLA 1.0
+//   - GPL V3: everybody else
+//
+// SCLA license terms accompanied with this source code.
+// See SCLA 1.0: https://technosoftware.com/license/Source_Code_License_Agreement.pdf
+//
+// GNU General Public License as published by the Free Software Foundation;
+// version 3 of the License are accompanied with this source code.
+// See https://technosoftware.com/license/GPLv3License.txt
+//
+// This source code is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.
+//-----------------------------------------------------------------------------
+#endregion Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
+
+#region Using Directives
+using System;
+#endregion
+
+namespace Technosoftware.DaAeHdaClient.Com
+{
+    /// <summary>
+    /// Manages the license to enable the different product versions.
+    /// </summary>
+    public partial class ApplicationInstance
+    {
+        #region Nested Enums
+        /// <summary>
+        /// The possible authentication levels.
+        /// </summary>
+        [Flags]
+        public enum AuthenticationLevel : uint
+        {
+            /// <summary>
+            /// Tells DCOM to choose the authentication level using its normal security blanket negotiation algorithm.
+            /// </summary>
+            Default = 0,
+
+            /// <summary>
+            /// Performs no authentication.
+            /// </summary>
+            None = 1,
+
+            /// <summary>
+            /// Authenticates the credentials of the client only when the client establishes a relationship with the server. Datagram transports always use Packet instead.
+            /// </summary>
+            Connect = 2,
+
+            /// <summary>
+            /// Authenticates only at the beginning of each remote procedure call when the server receives the request. Datagram transports use Packet instead.
+            /// </summary>
+            Call = 3,
+
+            /// <summary>
+            /// Authenticates that all data received is from the expected client.
+            /// </summary>
+            Packet = 4,
+
+            /// <summary>
+            /// Authenticates and verifies that none of the data transferred between client and server has been modified.
+            /// </summary>
+            Integrity = 5,
+
+            /// <summary>
+            /// Authenticates all previous levels and encrypts the argument value of each remote procedure call.
+            /// </summary>
+            Privacy = 6,
+        }
+        #endregion
+
+        #region Public Methods
+        /// <summary>
+        /// Initializes COM security. This should be called directly at the beginning of an application and can only be called once.
+        /// </summary>
+        /// <param name="authenticationLevel">The default authentication level for the process. Both servers and clients use this parameter when they call CoInitializeSecurity. With the Windows Update KB5004442 a higher authentication level of Integrity must be used.</param>
+        public static void InitializeSecurity(AuthenticationLevel authenticationLevel)
+        {
+            if (!InitializeSecurityCalled)
+            {
+                Com.Interop.InitializeSecurity((uint)authenticationLevel);
+                InitializeSecurityCalled = true;
+            }
+        }
+        #endregion
+
+        #region Internal Fields
+        internal static bool InitializeSecurityCalled;
+        #endregion
+    }
+}