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    <p>I solved my problem - I needed to use a certificate with 10.0.2.2 as the common name (CN) so it matched Android localhost ip address of 10.0.2.2 instead of 'localhost' or '127.0.0.1'. </p> <p>Edit: you could probably create a certificate with localhost as the CN and '127.0.0.1' and '10.0.2.2' as Subject Alternative Names (SAN).</p> <p>Once I created 10.0.2.2 cert and private key pem files, I was able to hit my server running with the following command:</p> <pre><code>openssl s_server -accept 8888 -cert 10.0.2.2-cert.pem -key 10.0.2.2-key.pem -state -www </code></pre> <p>If you want to force the client to provide a certificate (though it won't be checked), add the flag <code>-Verify 1</code> to the command above.</p> <p>To test the server at the command line you can use the following (note openssl is able to connect via 127.0.0.1):</p> <pre><code>openssl s_client -connect 127.0.0.1:8888 </code></pre> <p>And to add a client cert if the server requires it, add the flags <code>-cert client-cert.pem -key client-key.pem</code></p> <p>In my Android client I used the following code to connect (error checking removed):</p> <pre><code>// use local trust store (CA) TrustManagerFactory tmf; KeyStore trustedStore = null; InputStream in = context.getResources().openRawResource(R.raw.mycatruststore); // BKS in res/raw trustedStore = KeyStore.getInstance("BKS"); trustedStore.load(in, "insertBksPasswordHere".toCharArray()); tmf = TrustManagerFactory.getInstance("X509"); tmf.init(trustedStore); // load client certificate KeyStore clientKeyStore = loadClientKeyStore(getApplicationContext()); KeyManagerFactory kmf = KeyManagerFactory.getInstance("X509"); kmf.init(clientKeyStore, "insertPasswordHere".toCharArray()); SSLContext context = SSLContext.getInstance("TLS"); // provide client cert - if server requires client cert this will pass context.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null); HostnameVerifier hostnameVerifier = org.apache.http.conn.ssl.SSLSocketFactory.STRICT_HOSTNAME_VERIFIER; // connect to url URL u = new URL("https://10.0.2.2:8888/"); HttpsURLConnection urlConnection = (HttpsURLConnection) u.openConnection(); urlConnection.setSSLSocketFactory(context.getSocketFactory()); urlConnection.setHostnameVerifier(hostnameVerifier); urlConnection.connect(); System.out.println("Response Code: " + urlConnection.getResponseCode()); </code></pre> <p>You should get a response code of 200, and can dissect the response from there.</p> <p>Here's the code to load the client credentials, which is identical to loading the server key store but with a different resource filename and password:</p> <pre><code>private KeyStore loadClientKeyStore(Context context) { InputStream in = context.getResources().openRawResource(R.yourKeyStoreFile); KeyStore trusted = null; trusted = KeyStore.getInstance("BKS"); trusted.load(in, "yourClientPassword".toCharArray()); in.close(); return trusted; } </code></pre>
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