public static AdvancedSslSocketFactory getAdvancedSslSocketFactory(Context context) throws GeneralSecurityException, IOException { if (mAdvancedSslSocketFactory == null) { KeyStore trustStore = getKnownServersStore(context); AdvancedX509TrustManager trustMgr = new AdvancedX509TrustManager(trustStore); TrustManager[] tms = new TrustManager[] { trustMgr }; SSLContext sslContext; try { sslContext = SSLContext.getInstance("TLSv1.2"); } catch (NoSuchAlgorithmException e) { Log_OC.w(TAG, "TLSv1.2 is not supported in this device; falling through TLSv1.0"); sslContext = SSLContext.getInstance("TLSv1"); // should be available in any device; see reference of supported protocols in // http://developer.android.com/reference/javax/net/ssl/SSLSocket.html } sslContext.init(null, tms, null); mHostnameVerifier = new BrowserCompatHostnameVerifier(); mAdvancedSslSocketFactory = new AdvancedSslSocketFactory(sslContext, trustMgr, mHostnameVerifier); } return mAdvancedSslSocketFactory; }