C++ WinHttp安全證書驗證設置

在C++中，使用WinHttp庫進行HTTP請求時，可能需要對服務器的SSL/TLS證書進行驗證

以下是一個示例代碼，展示了如何在C++中使用WinHttp庫進行安全證書驗證設置：

#include<Windows.h>
#include <WinHttp.h>
#include<iostream>

int main() {
    // 初始化WinHttp
    HINTERNET hSession = WinHttpOpen(L"MyUserAgent", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
    if (!hSession) {
        std::cerr << "WinHttpOpen failed: "<< GetLastError()<< std::endl;
        return 1;
    }

    // 連接到服務器
    HINTERNET hConnect = WinHttpConnect(hSession, L"example.com", INTERNET_DEFAULT_HTTPS_PORT, 0);
    if (!hConnect) {
        std::cerr << "WinHttpConnect failed: "<< GetLastError()<< std::endl;
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 創建請求
    HINTERNET hRequest = WinHttpOpenRequest(hConnect, L"GET", L"/", NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_SECURE);
    if (!hRequest) {
        std::cerr << "WinHttpOpenRequest failed: "<< GetLastError()<< std::endl;
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 設置安全證書驗證選項
    DWORD dwOption = SECURITY_FLAG_IGNORE_UNKNOWN_CA | SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | SECURITY_FLAG_IGNORE_CERT_CN_INVALID | SECURITY_FLAG_IGNORE_CERT_WRONG_USAGE;
    if (!WinHttpSetOption(hRequest, WINHTTP_OPTION_SECURITY_FLAGS, &dwOption, sizeof(dwOption))) {
        std::cerr << "WinHttpSetOption failed: "<< GetLastError()<< std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 發送請求
    if (!WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0)) {
        std::cerr << "WinHttpSendRequest failed: "<< GetLastError()<< std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 接收響應
    if (!WinHttpReceiveResponse(hRequest, NULL)) {
        std::cerr << "WinHttpReceiveResponse failed: "<< GetLastError()<< std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 處理響應
    // ...

    // 清理資源
    WinHttpCloseHandle(hRequest);
    WinHttpCloseHandle(hConnect);
    WinHttpCloseHandle(hSession);

    return 0;
}

在這個示例中，我們設置了WINHTTP_OPTION_SECURITY_FLAGS選項，忽略了未知的CA、證書日期無效、證書CN無效和證書用途不正確的錯誤。這些選項可以根據實際需求進行調整。

請注意，這個示例僅用于演示目的，實際應用中應該根據需要進行適當的錯誤處理和資源管理。