如何在TrustManager中使用CertificateException？

Question

您可以在这篇Google Help Center文章中找到更多关于TrustManager的信息。

HostnameVerifier

您的应用程序正在使用HostnameVerifier接口的不安全实现。您可以在这篇Google Help Center文章中找到关于如何解决该问题的更多信息。

这是我的代码：

public class HttpsTrustManager implements X509TrustManager{

    private static TrustManager[] trustManagers;
    private static final X509Certificate[] _AcceptedIssuers = new X509Certificate[]{};
    private X509Certificate[] x509Certificates;

    @Override
    public void checkClientTrusted(

            java.security.cert.X509Certificate[] x509Certificates, String s)
            throws CertificateException {

    }

    @Override
    public void checkServerTrusted(
            java.security.cert.X509Certificate[] x509Certificates, String s)
            throws CertificateException {

    }

    public boolean isClientTrusted(X509Certificate[] chain) {
        return true;
    }

    public boolean isServerTrusted(X509Certificate[] chain) {
        return true;
    }

    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return _AcceptedIssuers;
    }

    public static void allowAllSSL() {
        HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {

            @Override
            public boolean verify(String arg0, SSLSession arg1) {
                return true;
            }

        });

        SSLContext context = null;
        if (trustManagers == null) {
            trustManagers = new TrustManager[]{new HttpsTrustManager()};
        }

        try {
            context = SSLContext.getInstance("TLS");
            context.init(null, trustManagers, new SecureRandom());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        }

        HttpsURLConnection.setDefaultSSLSocketFactory(context
                .getSocketFactory());
    }
}

我希望你能帮助我。谢谢你。

Answer 1

在您的代码中，您只是信任所有的东西。这是不安全的。正如谷歌所说，你应该判断证书并提出一个异常。像这样，

@override public void checkServerTrusted(java.security.cert.x509Certifice[]x509Certificates,String s）引发CertificateException{

        // do some check here if the x509Certificates not valid just raise an CertificateException exception.

        // this will check the certificate          
        if(!checkTheHostName(x509Certificates[0]){
            throw new CertificateException("the certificate is invalid ...");
        }
}


private boolean checkTheHostName(Certificate certificate,String hostName){
    return OkHostnameVerifier.INSTANCE.verify("www.yourhostname.com",certificate)
}

the OkHostnameVerifier's code, just in 
https://android.googlesource.com/platform/external/okhttp/+/e82a796/src/main/java/com/squareup/okhttp/internal/tls/OkHostnameVerifier.java

和代码

 @Override
            public boolean verify(String hostName, SSLSession session) {
                // here you should check the hostName, through session
                // do not just return true here, cause it's not safe. like man-in-middle-attack
               Certificate[] certificates = session.getPeerCertificates();
               return verify(host, (X509Certificate) certificates[0]);
    
            }