Android to server communication using SSL with Bouncy Castle

Question

I understand this is something which is not so difficult but very unfortunately I am stuck here and fighting it since yesterday, I have followed this Mutual Authentication i

Answer 1

I have answered some questions look like your issue as the following:

Read in PKCS12/P12 Client Cert file for Android App

Android volley self signed HTTPS trust anchor for certification path not found

You will find

    private SSLSocketFactory getSSLSocketFactory_KeyStore(String keyStoreType, int keystoreResId, String keyPassword)
            throws CertificateException, KeyStoreException, IOException, NoSuchAlgorithmException, KeyManagementException {

        InputStream caInput = getResources().openRawResource(keystoreResId);

        // creating a KeyStore containing trusted CAs

        if (keyStoreType == null || keyStoreType.length() == 0) {
            keyStoreType = KeyStore.getDefaultType();
        }
        KeyStore keyStore = KeyStore.getInstance(keyStoreType);

        keyStore.load(caInput, keyPassword.toCharArray());

        // creating a TrustManager that trusts the CAs in the KeyStore

        String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
        TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
        tmf.init(keyStore);

        TrustManager[] wrappedTrustManagers = getWrappedTrustManagers(tmf.getTrustManagers());

        SSLContext sslContext = SSLContext.getInstance("TLS");
        sslContext.init(null, wrappedTrustManagers, null);

        return sslContext.getSocketFactory();
    }

and getSSLSocketFactory_Certificate for .cert file.

As in the first link above, in your project you can call one of the two methods:

If using keystore file:

SSLSocketFactory sslSocketFactory = getSSLSocketFactory_KeyStore("PKCS12", R.raw.androidpkcs12, "123456789");

If using certificate file:

SSLSocketFactory sslSocketFactory = getSSLSocketFactory_Certificate("PKCS12", R.raw.androidpkcs12_cert);

P/S: If these methods are inside a non-activity class, to avoid NPE, you must pass Context from your Activity to that class (as inside the first link above).

Hope this helps!