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luosheng
394
Technosoftware/DaAeHdaClient/LicenseHandler.cs
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394
Technosoftware/DaAeHdaClient/LicenseHandler.cs
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#region Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
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//-----------------------------------------------------------------------------
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// Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
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// Web: https://www.technosoftware.com
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//
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// The source code in this file is covered under a dual-license scenario:
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// - Owner of a purchased license: SCLA 1.0
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// - GPL V3: everybody else
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//
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// SCLA license terms accompanied with this source code.
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// See SCLA 1.0: https://technosoftware.com/license/Source_Code_License_Agreement.pdf
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//
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// GNU General Public License as published by the Free Software Foundation;
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// version 3 of the License are accompanied with this source code.
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// See https://technosoftware.com/license/GPLv3License.txt
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//
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// This source code is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE.
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//-----------------------------------------------------------------------------
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#endregion Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
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#region Using Directives
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using System;
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using System.Linq;
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using static System.String;
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using System.Diagnostics;
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using Technosoftware.DaAeHdaClient.Utilities;
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#endregion
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namespace Technosoftware.DaAeHdaClient
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{
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/// <summary>
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/// Manages the license to enable the different product versions.
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/// </summary>
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public class LicenseHandler
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{
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#region Nested Enums
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/// <summary>
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/// The possible products.
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/// </summary>
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[Flags]
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public enum ProductLicense : uint
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{
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/// <summary>
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/// No product selected
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/// </summary>
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None = 0,
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/// <summary>
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/// OPC DA/AE/HDA Client .NET
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/// </summary>
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Client = 1,
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/// <summary>
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/// OPC DA/AE Server .NET
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/// </summary>
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Server = 2,
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/// <summary>
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/// Evaluation
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/// </summary>
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Evaluation = 4,
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/// <summary>
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/// Expired Evaluation or License
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/// </summary>
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Expired = 8,
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}
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/// <summary>
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/// The possible products.
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/// </summary>
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[Flags]
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public enum ProductFeature : uint
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{
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/// <summary>
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/// Basic OPC Features enabled
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/// </summary>
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None = 0,
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/// <summary>
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/// OPC DataAccess enabled
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/// </summary>
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DataAccess = 1,
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/// <summary>
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/// OPC Alarms and Events enabled
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/// </summary>
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AlarmsConditions = 2,
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/// <summary>
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/// OPC Historical Dara Access enabled
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/// </summary>
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HistoricalAccess = 4,
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/// <summary>
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/// All supported OPC DA/AE/HDA Features enabled
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/// </summary>
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AllFeatures = uint.MaxValue,
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}
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#endregion
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#region Constants
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/// <summary>
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/// License Validation Parameters String for the OPC UA Solution .NET
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/// </summary>
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private const string LicenseParameter =
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@"";
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#endregion
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#region Internal Fields
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internal static bool LicenseTraceDone;
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#endregion
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#region Properties
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/// <summary>
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/// Returns whether the product is a licensed product.
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/// </summary>
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/// <returns>Returns true if the product is licensed; false if it is used in evaluation mode or license is expired.</returns>
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public static bool IsLicensed
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{
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get
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{
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if ((LicensedProduct == ProductLicense.None) ||
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((LicensedProduct & ProductLicense.Expired) == ProductLicense.Expired) ||
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((LicensedProduct & ProductLicense.Evaluation) == ProductLicense.Evaluation))
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{
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return false;
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}
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return true;
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}
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}
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/// <summary>
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/// Returns whether the product is an evaluation version.
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/// </summary>
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/// <returns>Returns true if the product is an evaluation; false if it is a product or license is expired.</returns>
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public static bool IsEvaluation
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{
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get
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{
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if ((LicensedProduct & ProductLicense.Evaluation) == ProductLicense.Evaluation)
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{
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return true;
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}
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return false;
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}
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}
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/// <summary>
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/// Indicates whether the evaluation period and a restart is required or not.
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/// </summary>
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public static bool IsExpired
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{
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get
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{
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if ((LicensedProduct & ProductLicense.Expired) == ProductLicense.Expired)
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{
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return true;
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}
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return false;
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}
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}
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/// <summary>
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/// Returns the Version of the product.
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/// </summary>
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public static string Version
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{
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get
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{
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string versionString;
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try
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{
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var assembly = (typeof(LicenseHandler).Assembly);
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var versionInfo = FileVersionInfo.GetVersionInfo(assembly.Location);
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var major = versionInfo.FileMajorPart;
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var minor = versionInfo.FileMinorPart;
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var build = versionInfo.FileBuildPart;
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versionString = $"{major}.{minor}.{build}";
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}
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catch (Exception)
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{
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versionString = "Unknown";
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}
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return versionString;
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}
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}
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/// <summary>
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/// Returns the licensed products.
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/// </summary>
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public static ProductLicense LicensedProduct { get; set; } = ProductLicense.Client;
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/// <summary>
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/// Returns the licensed OPC UA Features.
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/// </summary>
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public static ProductFeature LicensedFeatures { get; set; } = ProductFeature.AllFeatures;
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/// <summary>
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/// Returns the licensed product name.
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/// </summary>
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public static string Product
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{
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get
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{
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var product = "Expired Evaluation or License";
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if ((LicensedProduct & ProductLicense.Expired) == ProductLicense.Expired)
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{
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// It's an expired evaluation or license
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if (((LicensedProduct & ProductLicense.Client) == ProductLicense.Client) &&
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((LicensedProduct & ProductLicense.Server) == ProductLicense.Server))
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{
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product = "Expired OPC DA/AE/HDA Bundle .NET license";
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}
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else if ((LicensedProduct & ProductLicense.Client) == ProductLicense.Client)
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{
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product = "Expired OPC DA/AE/HDA Client .NET license";
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}
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else if ((LicensedProduct & ProductLicense.Server) == ProductLicense.Server)
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{
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product = "Expired OPC DA/HDA Server .NET license";
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}
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else if ((LicensedProduct & ProductLicense.Evaluation) == ProductLicense.Evaluation)
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{
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product = "Expired OPC DA/AE/HDA Bundle .NET Evaluation";
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}
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return product;
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}
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// It's a license or evaluation
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if (((LicensedProduct & ProductLicense.Client) == ProductLicense.Client) &&
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((LicensedProduct & ProductLicense.Server) == ProductLicense.Server))
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{
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product = "OPC DA/AE/HDAUA Bundle .NET";
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}
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else if ((LicensedProduct & ProductLicense.Client) == ProductLicense.Client)
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{
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product = "OPC DA/AE/HDA Client .NET";
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}
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else if ((LicensedProduct & ProductLicense.Server) == ProductLicense.Server)
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{
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product = "OPC DA/AE Server .NET";
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}
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else if ((LicensedProduct & ProductLicense.Evaluation) == ProductLicense.Evaluation)
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{
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product = "OPC DA/AE/HDA Bundle .NET Evaluation";
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}
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return product;
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}
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}
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/// <summary>
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/// Returns the product information.
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/// </summary>
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public static string ProductInformation
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{
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get
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{
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if (IsLicensed)
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{
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return Product;
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}
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if (!Check())
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{
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return Product + " EVALUATION EXPIRED !!!";
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}
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return Product + " EVALUATION";
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}
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}
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internal static bool Checked { get; private set; }
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#endregion
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#region Public Methods
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/// <summary>
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/// Validate the license.
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/// </summary>
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/// <param name="serialNumber">Serial Number</param>
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public static bool Validate(string serialNumber)
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{
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return CheckLicense(serialNumber);
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}
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#endregion
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#region Protected Methods
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/// <summary>
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/// Validate the license.
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/// </summary>
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/// <param name="serialNumber">Serial Number</param>
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protected static bool CheckLicense(string serialNumber)
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{
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var check = CheckLicenseClient(serialNumber);
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CheckProductFeature(serialNumber);
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if (check)
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{
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return true;
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}
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return false;
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}
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/// <summary>
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/// Check if the licensed product provided through ValidateLicense qualifies for the given application type and license edition.
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/// </summary>
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/// <returns>True if the license qualifies for the requested application and edition or if the evaluation period is still running; otherwise False.</returns>
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protected static bool CheckLicense()
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{
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if (Checked && LicensedProduct == ProductLicense.None)
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{
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return false;
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}
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if (Checked &&
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((LicensedProduct & ProductLicense.Client) == ProductLicense.Client))
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{
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return true;
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}
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CheckProductFeature("");
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return Check();
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}
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#endregion
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#region Internal Methods
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/// <summary>
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/// Core Feature validation
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/// </summary>
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/// <returns>True if valid; false otherwise</returns>
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/// <exception cref="BadInternalErrorException"></exception>
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public static void ValidateFeatures(ProductFeature requiredProductFeature = ProductFeature.None, bool silent = false)
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{
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var valid = CheckLicense();
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if (!LicenseTraceDone)
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{
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LicenseTraceDone = true;
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Utils.Trace("Used Product = {0}, Features = {1}, Version = {2}.", Product, LicensedFeatures, Version);
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}
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if (!valid && !IsLicensed && !silent)
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{
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throw new BadInternalErrorException("Evaluation time expired! You need to restart the application.");
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}
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if (!valid && !silent)
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{
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throw new BadInternalErrorException("License required! You can't use this feature.");
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}
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if (requiredProductFeature != ProductFeature.None && LicensedFeatures != ProductFeature.AllFeatures)
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{
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if (((requiredProductFeature & LicensedFeatures) != requiredProductFeature) && !silent)
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{
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var message =
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$"Feature {requiredProductFeature} required but only {LicensedFeatures} licensed! You can't use this feature.";
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throw new BadInternalErrorException(message);
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}
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}
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}
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#endregion
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#region Private Methods
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/// <summary>
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/// Validate the license.
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/// </summary>
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/// <param name="licenseKey">The license key</param>
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protected static void CheckProductFeature(string licenseKey)
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{
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}
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/// <summary>
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/// Validate the license.
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/// </summary>
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/// <param name="licenseKey">The license key</param>
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protected static bool CheckLicenseClient(string licenseKey)
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{
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return true;
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}
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internal static bool Check()
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{
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return true;
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}
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#endregion
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}
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}
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