Android java.security.cert.CertPathValidatorException: Trust anchor for certification path not found

Question

There are three hosts that an android app do the authentication and authorization. Final host is the REST API. For the first time using Oauth authentication and authorization pr

Answer 1

1. Paste your cert.pem in raw folder

2. Create a method

   private SSLSocketFactory getSSLSocketFactory(){
       try {
           CertificateFactory cf;
           cf = CertificateFactory.getInstance("X.509");
   
           Certificate ca;
           InputStream cert = context.getResources().openRawResource(R.raw.cert);
           ca = cf.generateCertificate(cert);
           cert.close();
   
           String keyStoreType = KeyStore.getDefaultType();
           KeyStore keyStore   = KeyStore.getInstance(keyStoreType);
           keyStore.load(null, null);
           keyStore.setCertificateEntry("ca", ca);
   
           String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
           TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
           tmf.init(keyStore);
   
           SSLContext sslContext = SSLContext.getInstance("TLS");
           sslContext.init(null, tmf.getTrustManagers(), null);
   
           return sslContext.getSocketFactory();
   
       }
       catch (Exception e){
           return null;
       }
   }
   

3. Call like this

   final OkHttpClient client = new OkHttpClient();
    //pass getSSLSocketFactory() in params
    client.setSslSocketFactory(getSSLSocketFactory());
   
    String appURl = context.getString(R.string.apis_app_url);
   
    final RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint(appURl).setClient(new OkClient(client)).
                    build();