如何在Android应用中修复X509TrustManager的不安全实现

Question

谷歌已经建议我在我的Android应用程序中有一个不安全的接口X509TrustManager实现,需要更改我的代码如下:

要正确处理SSL证书验证,请在自定义X509TrustManager接口的checkServerTrusted方法中更改代码,以便在服务器提供的证书不符合您的期望时引发CertificateException或IllegalArgumentException.对于技术问题,您可以发布到Stack Overflow并使用标签"android-security"和"TrustManager".

如何修改以下代码以解决上述问题？

public EasySSLSocketFactory(KeyStore truststore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
    super(truststore);

    TrustManager tm = new X509TrustManager()  {
        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    };

    mContext.init(null, new TrustManager[] { tm }, null);
}

Answer 1

我用以下代码解决了这个问题:

public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                try {
                    chain[0].checkValidity();
                } catch (Exception e) {
                    throw new CertificateException("Certificate not valid or trusted.");
                }
            }