279 lines
10 KiB
C++
279 lines
10 KiB
C++
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#pragma once
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/**
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* @file license_manager.h
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* @brief ViewDesignEngine 许可证管理系统
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*
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* 提供三层许可证体系：
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* - Community（社区版）：基础 B-Rep + STEP/IGES 导入导出
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* - Professional（专业版）：+ 5轴CAM + 高级曲面 + GD&T
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* - Enterprise（企业版）：+ 技术支持 + 自定义格式
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*
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* LicenseKey 格式：VDE-XXXX-XXXX-XXXX（Base32编码）
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* 包含：版本号 + tier + 过期时间 + 签名（HMAC-SHA256）
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*
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* @ingroup core
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*/
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#include <cstdint>
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#include <string>
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#include <vector>
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#include <set>
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#include <ctime>
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#include <mutex>
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namespace vde::core {
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// ═══════════════════════════════════════════════════════════════
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// LicenseTier 枚举
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// ═══════════════════════════════════════════════════════════════
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/// 许可证层级
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enum class LicenseTier : int {
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Community = 0, ///< 社区版
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Professional = 1, ///< 专业版
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Enterprise = 2, ///< 企业版
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};
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/// 将 LicenseTier 转为字符串
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inline const char* license_tier_name(LicenseTier tier) {
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switch (tier) {
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case LicenseTier::Community: return "Community";
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case LicenseTier::Professional: return "Professional";
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case LicenseTier::Enterprise: return "Enterprise";
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}
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return "Unknown";
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}
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/// 从字符串解析 LicenseTier，失败返回 -1
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int parse_license_tier(const std::string& name);
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// ═══════════════════════════════════════════════════════════════
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// Feature 枚举（按 tier 区分）
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// ═══════════════════════════════════════════════════════════════
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/// 功能特性标识
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enum class Feature : int {
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// Community 级别
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BASIC_BREP = 0, ///< 基础B-Rep建模
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STEP_IMPORT_EXPORT = 1, ///< STEP导入导出
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IGES_IMPORT_EXPORT = 2, ///< IGES导入导出
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BASE_IO_FORMATS = 3, ///< 基础格式IO（OBJ/STL/PLY）
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MESH_OPERATIONS = 4, ///< 基本网格操作
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SKETCH_SOLVER = 5, ///< 草图约束求解
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// Professional 级别
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CAM_5AXIS = 10, ///< 5轴CAM加工
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ADVANCED_SURFACING = 11, ///< 高级曲面建模（A级曲面等）
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GD_T = 12, ///< GD&T 几何尺寸和公差
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PMI_MBD = 13, ///< PMI / 基于模型的定义
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ASSEMBLY_DESIGN = 14, ///< 装配设计
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SHEET_METAL = 15, ///< 钣金设计
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ADVANCED_HEALING = 16, ///< 高级修复
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FEA_MESH = 17, ///< FEA网格生成
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IGA_ANALYSIS = 18, ///< IGA等几何分析
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COLLISION_DETECTION = 19, ///< 碰撞检测
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DIRECT_MODELING = 20, ///< 直接建模
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SURFACE_FAIRING = 21, ///< 曲面光顺
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// Enterprise 级别
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TECHNICAL_SUPPORT = 30, ///< 技术支持
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CUSTOM_FORMATS = 31, ///< 自定义格式支持
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SCRIPTING_API = 32, ///< 脚本API
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GPU_ACCELERATION = 33, ///< GPU加速
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CLOUD_COLLABORATION = 34, ///< 云端协作
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SDF_MODELING = 35, ///< SDF隐式建模
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LICENSE_MANAGER_SDK = 36, ///< License SDK分发
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};
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/// Feature 转字符串
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const char* feature_name(Feature f);
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/// 字符串转 Feature，失败返回 -1
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int parse_feature(const std::string& name);
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/// 获取指定 tier 包含的所有 feature
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std::set<Feature> features_for_tier(LicenseTier tier);
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/// 检查某个 feature 是否属于指定 tier
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bool feature_available_in_tier(Feature f, LicenseTier tier);
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// ═══════════════════════════════════════════════════════════════
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// LicenseInfo 结构体
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// ═══════════════════════════════════════════════════════════════
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/// 许可证信息
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struct LicenseInfo {
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LicenseTier tier; ///< 层级
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std::string licensee; ///< 被许可方（公司/个人名称）
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std::time_t expiry; ///< 过期时间（Unix时间戳，0=永久）
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std::set<Feature> features; ///< 启用的功能列表
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std::string key_string; ///< 原始License Key字符串
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int version; ///< License版本号
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/// 默认构造（Community试用版）
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LicenseInfo()
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: tier(LicenseTier::Community)
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, licensee("Trial User")
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, expiry(0)
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, version(1) {}
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/// 是否已过期
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[[nodiscard]] bool is_expired() const;
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/// 距离过期还剩多少天（返回 -1 表示永久有效）
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[[nodiscard]] int days_until_expiry() const;
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};
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// ═══════════════════════════════════════════════════════════════
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// LicenseKey 类
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// ═══════════════════════════════════════════════════════════════
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/**
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* @brief LicenseKey 生成/验证/解析类
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*
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* License Key 格式：VDE-XXXX-XXXX-XXXX
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* 其中 XXXX 段为 Base32 编码的二进制数据。
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*
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* 二进制数据布局（17字节）：
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* - byte 0: version (1)
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* - byte 1: tier (0=Community, 1=Professional, 2=Enterprise)
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* - byte 2-9: expiry (uint64_t, Unix timestamp, big-endian)
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* - byte 10-16: reserved (0)
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*
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* 签名：HMAC-SHA256 的前 4 字节附加到 Base32 编码后的最后一段。
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*
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* 完整的 Key 编码流程：
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* payload(17B) → HMAC-SHA256 → 取前4B → payload+signature(21B) → Base32 → VDE-XXXX-XXXX-XXXX
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*/
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class LicenseKey {
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public:
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/// 默认构造（无效Key）
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LicenseKey() = default;
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/**
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* @brief 从字符串解析 LicenseKey
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* @param key_str 如 "VDE-ABCD-EFGH-IJKL"
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* @return 如果格式有效返回 true
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*/
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bool parse(const std::string& key_str);
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/**
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* @brief 生成 LicenseKey
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* @param tier 许可证层级
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* @param expiry 过期时间（Unix时间戳，0=永久）
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* @param licensee 被许可方名称
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* @return 格式化的License Key字符串
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*/
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static std::string generate(LicenseTier tier, std::time_t expiry,
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const std::string& licensee);
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/**
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* @brief 验证 LicenseKey 是否有效
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* @param key_str License Key 字符串
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* @return 有效则返回 true
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*/
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static bool validate(const std::string& key_str);
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/// 获取解析后的 LicenseInfo
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[[nodiscard]] const LicenseInfo& info() const { return info_; }
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/// 原始 Key 字符串
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[[nodiscard]] const std::string& key_string() const { return key_string_; }
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/// 签名验证是否通过
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[[nodiscard]] bool signature_valid() const { return sig_valid_; }
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private:
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/// Base32 编解码（RFC 4648，无填充）
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static std::string base32_encode(const std::vector<uint8_t>& data);
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static std::vector<uint8_t> base32_decode(const std::string& encoded);
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/// HMAC-SHA256 简化实现（使用占位密钥）
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static std::vector<uint8_t> compute_hmac(const std::vector<uint8_t>& data);
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LicenseInfo info_;
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std::string key_string_;
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bool sig_valid_ = false;
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};
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// ═══════════════════════════════════════════════════════════════
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// LicenseManager 单例
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// ═══════════════════════════════════════════════════════════════
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/**
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* @brief LicenseManager 全局许可证管理器（单例）
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*
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* 管理当前运行时使用的许可证，提供功能查询接口。
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*
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* 用法：
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* @code
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* auto& mgr = LicenseManager::instance();
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* mgr.set_license("VDE-ABCD-EFGH-IJKL");
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* if (mgr.has_feature("CAM_5AXIS")) { ... }
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* if (mgr.is_expired()) { ... }
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* @endcode
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*/
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class LicenseManager {
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public:
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/// 获取单例实例
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static LicenseManager& instance();
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// ── 禁止拷贝和移动 ──────────────────────────────
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LicenseManager(const LicenseManager&) = delete;
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LicenseManager& operator=(const LicenseManager&) = delete;
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/**
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* @brief 设置 License Key
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* @param key License Key 字符串
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* @return true 设置成功（Key有效且未过期）
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*/
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bool set_license(const std::string& key);
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/**
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* @brief 进入试用模式（30天Community试用）
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* @param days 试用天数（默认30）
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*/
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void start_trial(int days = 30);
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/// 当前许可证层级
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[[nodiscard]] LicenseTier current_tier() const;
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/**
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* @brief 检查是否拥有某个功能
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* @param feature_name 功能名称字符串（如 "CAM_5AXIS"）
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* @return true 表示该功能可用
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*/
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[[nodiscard]] bool has_feature(const std::string& feature_name) const;
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/**
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* @brief 检查 Feature 枚举是否可用
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* @param f Feature 枚举值
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* @return true 表示该功能可用
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*/
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[[nodiscard]] bool has_feature(Feature f) const;
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/// 许可证是否已过期
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[[nodiscard]] bool is_expired() const;
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/// 试用剩余天数（-1 表示已过期或无试用）
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[[nodiscard]] int trial_days_left() const;
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/// 获取当前许可证信息
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[[nodiscard]] const LicenseInfo& current_license() const;
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/// 是否处于试用模式
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[[nodiscard]] bool is_trial() const;
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private:
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LicenseManager();
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~LicenseManager() = default;
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LicenseInfo current_;
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bool trial_mode_ = false;
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std::time_t trial_start_ = 0;
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int trial_days_ = 30;
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mutable std::mutex mutex_;
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};
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} // namespace vde::core
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