C++ QSslConfiguration::protocol方法代码示例

// static
void QSslContext::initSslContext(QSslContext *sslContext, QSslSocket::SslMode mode, const QSslConfiguration &configuration, bool allowRootCertOnDemandLoading)
{
    sslContext->sslConfiguration = configuration;
    sslContext->errorCode = QSslError::NoError;

    bool client = (mode == QSslSocket::SslClientMode);

    bool reinitialized = false;
    bool unsupportedProtocol = false;
init_context:
    if (sslContext->sslConfiguration.protocol() == QSsl::SslV2) {
        // SSL 2 is no longer supported, but chosen deliberately -> error
        sslContext->ctx = nullptr;
        unsupportedProtocol = true;
    } else {
        // The ssl options will actually control the supported methods
        sslContext->ctx = q_SSL_CTX_new(client ? q_TLS_client_method() : q_TLS_server_method());
    }

    if (!sslContext->ctx) {
        // After stopping Flash 10 the SSL library loses its ciphers. Try re-adding them
        // by re-initializing the library.
        if (!reinitialized) {
            reinitialized = true;
            if (q_OPENSSL_init_ssl(0, nullptr) == 1)
                goto init_context;
        }

        sslContext->errorStr = QSslSocket::tr("Error creating SSL context (%1)").arg(
            unsupportedProtocol ? QSslSocket::tr("unsupported protocol") : QSslSocketBackendPrivate::getErrorsFromOpenSsl()
        );
        sslContext->errorCode = QSslError::UnspecifiedError;
        return;
    }

    // Enable bug workarounds.
    long options = QSslSocketBackendPrivate::setupOpenSslOptions(configuration.protocol(), configuration.d->sslOptions);
    q_SSL_CTX_set_options(sslContext->ctx, options);

    // Tell OpenSSL to release memory early
    // http://www.openssl.org/docs/ssl/SSL_CTX_set_mode.html
    q_SSL_CTX_set_mode(sslContext->ctx, SSL_MODE_RELEASE_BUFFERS);

    // Initialize ciphers
    QByteArray cipherString;
    bool first = true;
    QList<QSslCipher> ciphers = sslContext->sslConfiguration.ciphers();
    if (ciphers.isEmpty())
        ciphers = QSslSocketPrivate::defaultCiphers();
    for (const QSslCipher &cipher : qAsConst(ciphers)) {
        if (first)
            first = false;
        else
            cipherString.append(':');
        cipherString.append(cipher.name().toLatin1());
    }

    if (!q_SSL_CTX_set_cipher_list(sslContext->ctx, cipherString.data())) {
        sslContext->errorStr = QSslSocket::tr("Invalid or empty cipher list (%1)").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl());
        sslContext->errorCode = QSslError::UnspecifiedError;
        return;
    }

    const QDateTime now = QDateTime::currentDateTimeUtc();

    // Add all our CAs to this store.
    const auto caCertificates = sslContext->sslConfiguration.caCertificates();
    for (const QSslCertificate &caCertificate : caCertificates) {
        // From https://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html:
        //
        // If several CA certificates matching the name, key identifier, and
        // serial number condition are available, only the first one will be
        // examined. This may lead to unexpected results if the same CA
        // certificate is available with different expiration dates. If a
        // ``certificate expired'' verification error occurs, no other
        // certificate will be searched. Make sure to not have expired
        // certificates mixed with valid ones.
        //
        // See also: QSslSocketBackendPrivate::verify()
        if (caCertificate.expiryDate() >= now) {
            q_X509_STORE_add_cert(q_SSL_CTX_get_cert_store(sslContext->ctx), (X509 *)caCertificate.handle());
        }
    }

    if (QSslSocketPrivate::s_loadRootCertsOnDemand && allowRootCertOnDemandLoading) {
        // tell OpenSSL the directories where to look up the root certs on demand
        const QList<QByteArray> unixDirs = QSslSocketPrivate::unixRootCertDirectories();
        for (const QByteArray &unixDir : unixDirs)
            q_SSL_CTX_load_verify_locations(sslContext->ctx, nullptr, unixDir.constData());
    }

    if (!sslContext->sslConfiguration.localCertificate().isNull()) {
        // Require a private key as well.
        if (sslContext->sslConfiguration.privateKey().isNull()) {
            sslContext->errorStr = QSslSocket::tr("Cannot provide a certificate with no key, %1").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl());
            sslContext->errorCode = QSslError::UnspecifiedError;
            return;
        }

//.........这里部分代码省略.........