The project is available at GitHub - SSLContext-Kickstart Install the libraryĪdd the library with one of the snippets below. One library to configure them all! It should be painless to use, easy to test and debug, and fun to set-it-up. I wanted to help myself out from the verbosity make my life easier. And it got even tougher when we wanted to use multiple keystores as trust material for example. It was just a configuration that needed to be set up once, well enough to do the job, and after that, we were scared to touch it again. I faced the same challenges as my colleagues. These clients only accept an SSLContext from Netty's library instead of the one from the JDK. Some other HTTP clients even require a different setup (e.g., Netty HttpClient, AsyncHttpClient, and Dispatch Reboot). The only way to really validate your code is by writing an integration test, where the client actually sends a request to a real server with HTTPS enabled. It is also hard to unit test a SSLContext object because you can't get any information from it that will tell if the trustmanager is really initialised well and if it contains all the trusted certificates. If you use the fuel-moshi modules, you may need to add rules for Moshi and Moshi-Kotlin. If you use the fuel-serialization modules, you may need to add rules for Serialization. If you use Proguard, you may need to add rules for Coroutines, OkHttp and Okio. HttpGet request = new HttpGet(" HttpResponse response = httpClient.execute(request) Īs you can see this really verbose, but this is a common code snippet which is being used when setting up ssl/tls for a http client. Fuel is fully compatible with R8 out of the box and doesn't require adding any extra rules. setSSLHostnameVerifier(new DefaultHostnameVerifier()) HttpClient httpClient = HttpClients.custom() The Kotlin API client is built on top of these Kotlin libraries: Kotlin multiplatform. SSLContext sslContext = SSLContext.getInstance("TLS") KeyManagerFactory.init(identity, "password".toCharArray()) KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(keyManagerFactoryAlgorithm) String keyManagerFactoryAlgorithm = KeyManagerFactory.getDefaultAlgorithm() Identity.load(identityStream, "password".toCharArray()) KeyStore identity = KeyStore.getInstance(keyStoreType) InputStream identityStream = Files.newInputStream(identityPath, StandardOpenOption.READ) Path identityPath = Paths.get("/path/to/identity.jks") TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(trustManagerFactoryAlgorithm) String trustManagerFactoryAlgorithm = TrustManagerFactory.getDefaultAlgorithm() TrustStore.load(trustStoreStream, "password".toCharArray()) KeyStore trustStore = KeyStore.getInstance(keyStoreType) InputStream trustStoreStream = Files.newInputStream(trustStorePath, StandardOpenOption.READ) Path trustStorePath = Paths.get("/path/to/truststore.jks") String keyStoreType = KeyStore.getDefaultType() For this example, I will use Apache HttpClient with mutual authentication. I want to provide a couple of examples to explain the hidden difficulties when setting up a secure connection with HTTPS and certificates in vanilla Java. It will also explain how to create KeyStores, Certificates, Certificate Signing Requests, and how to implement these techniques. HttpClient client HttpClient.newHttpClient() HttpRequest request HttpRequest.newBuilder().
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