sslcontext kickstart

🔐 A lightweight high level library for configuring a http client or server based on SSLContext or other properties such as TrustManager, KeyManager or Trusted Certificates to communicate over SSL TLS for one way authentication or two way authentication provided by the SSLFactory. Support for Java, Scala and Kotlin based clients with examples. Available client examples are: Apache HttpClient, OkHttp, Spring RestTemplate, Spring WebFlux WebClient Jetty and Netty, the old and the new JDK HttpClient, the old and the new Jersey Client, Google HttpClient, Unirest, Retrofit, Feign, Methanol, Vertx, Scala client Finagle, Featherbed, Dispatch Reboot, AsyncHttpClient, Sttp, Akka, Requests Scala, Http4s Blaze, Kotlin client Fuel, http4k Kohttp and Ktor. Also gRPC, WebSocket and ElasticSearch examples are included

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Install library with:

Install with Maven

<dependency>
    <groupId>io.github.hakky54</groupId>
    <artifactId>sslcontext-kickstart</artifactId>
    <version>8.3.7</version>
</dependency>

Install with Gradle

implementation 'io.github.hakky54:sslcontext-kickstart:8.3.7'

Install with Gradle Kotlin DSL

implementation("io.github.hakky54:sslcontext-kickstart:8.3.7")

Install with Scala SBT

libraryDependencies += "io.github.hakky54" % "sslcontext-kickstart" % "8.3.7"

Install with Apache Ivy


<dependency org="io.github.hakky54" name="sslcontext-kickstart" rev="8.3.7"/>

Table of contents

  1. Introduction
  2. Usage
  3. Additional mappers for specific libraries
  4. Tested HTTP Clients
  5. Contributing
  6. Contributors

Introduction

SSLContext Kickstart is a library which provides a High-Level SSLFactory class for configuring a http client or a server to communicate over SSL/TLS for one way authentication or two-way authentication.
It is designed to be as lightweight as possible by having minimized the external dependencies. The core library only depends on the SLF4J logging API.

History

As a Java developer I worked for different kinds of clients. Most of the time the application required to call other microservices within the organization or some other http servers.
These requests needed to be secured, and therefore it was required to load the ssl materials into the http client. Each http client may require different input value to enable https requests, and therefore I couldn’t just copy-paste my earlier configuration into the new project.
The resulting configuration was in my opinion always verbose, not reusable, hard to test and hard to maintain.

As a developer you also need to know how to properly load your file into your application and consume it as a KeyStore instance. Therefore, you also need to understand how to properly create for example a KeyManager and a TrustManager for you SSLContext.
The sslcontext-kickstart library is taking the responsibility of creating an instance of SSLContext from the provided arguments, and it will provide you all the ssl materials which are required to configure 40+ different Http Client for Java, Scala and Kotlin.
I wanted the library to be as easy as possible to use for all developers to give them a kickstart when configuring their Http Client. So feel free to provide feedback or feature requests.
The library also provides other utilities such as:

See the javadoc for all the options.

Acknowledgement

I would like to thank Cody A. Ray for his contribution to the community regarding loading multiple Keystores into the SSLContext. The limitation of the JDK is to only support one keystore for the KeyManagerFactory and only one keystore for the TrustManagerFactory.
The code snippets which Cody has shared are now available within this library and can be found here: AggregatedX509ExtendedKeyManager and AggregatedX509ExtendedTrustManager

The original content can be found here:

Advantages:

  • No need for low-level SSLContext configuration anymore
  • No knowledge needed about SSLContext, TrustManager, TrustManagerFactory, KeyManager, KeyManagerFactory and how to create it.
  • Above classes will all be created with just providing an identity and a trust material
  • Load multiple identities/trustStores/keyManagers/trustManagers
  • Hot reload ssl material without need of restarting/recreating Http Client or Server

Definitions

  • Identity material: A KeyStore or KeyManager which holds the key pair also known as private and public key
  • Trust material: A KeyStore or TrustManager containing one or more certificates also known as public key. This KeyStore contains a list of trusted certificates
  • One way authentication (also known as one way tls, one way ssl): Https connection where the client validates the certificate of the counter party
  • Two way authentication (also known as two way tls, two way ssl, mutual authentication): Https connection where the client as well as the counter party validates the certificate, also known as mutual authentication

Compatibility

Java Kotlin Scala Android
8+ 1.5+ 2.11+ 24+

Usage

Basic example configuration

Example configuration with apache http client, or click here to view the other client configurations

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;

import nl.altindag.ssl.SSLFactory;

public class App {

    public static void main(String[] args) throws IOException, JSONException {
        SSLFactory sslFactory = SSLFactory.builder()
                .withDefaultTrustMaterial()
                .build();

        HttpClient httpClient = HttpClients.custom()
                .setSSLContext(sslFactory.getSslContext())
                .setSSLHostnameVerifier(sslFactory.getHostnameVerifier())
                .build();

        HttpGet request = new HttpGet("https://api.chucknorris.io/jokes/random");

        HttpResponse response = httpClient.execute(request);
        String chuckNorrisJoke = new JSONObject(EntityUtils.toString(response.getEntity())).getString("value");

        System.out.println(String.format("Received the following status code: %d", response.getStatusLine().getStatusCode()));
        System.out.println(String.format("Received the following joke: %s", chuckNorrisJoke));
    }

}

Response:

Received the following status code: 200
Received the following joke: If a black cat crosses your path, you have bad luck. If Chuck Norris crosses your path, it was nice knowing you.

Other possible configurations

Loading keystore and truststore from the classpath
SSLFactory.builder()
          .withIdentityMaterial("identity.jks", "password".toCharArray())
          .withTrustMaterial("truststore.jks", "password".toCharArray())
          .build();
Loading keystore and trust store from anywhere on the filesystem
SSLFactory.builder()
          .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
          .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
          .build();
Loading keystore and trust store from InputStream
InputStream keyStoreStream = ...
InputStream trustStoreStream = ...

SSLFactory.builder()
          .withIdentityMaterial(keyStoreStream, "password".toCharArray())
          .withTrustMaterial(trustStoreStream, "password".toCharArray())
          .build();
Loading trust material with OCSP options
Loading trust material with TrustStore and OCSP options from the classpath
CertPathBuilder certPathBuilder = CertPathBuilder.getInstance("PKIX");
PKIXRevocationChecker revocationChecker = (PKIXRevocationChecker) certPathBuilder.getRevocationChecker();
revocationChecker.setOptions(EnumSet.of(PKIXRevocationChecker.Option.NO_FALLBACK));

SSLFactory sslFactory = SSLFactory.builder()
        .withTrustMaterial("truststore.jks", "password".toCharArray(), trustStore -> {
            PKIXBuilderParameters pkixBuilderParameters = new PKIXBuilderParameters(trustStore, new X509CertSelector());
            pkixBuilderParameters.addCertPathChecker(revocationChecker);
            return new CertPathTrustManagerParameters(pkixBuilderParameters);
        })
        .build();
Loading trust material with TrustStore and OCSP options from the file system
CertPathBuilder certPathBuilder = CertPathBuilder.getInstance("PKIX");
PKIXRevocationChecker revocationChecker = (PKIXRevocationChecker) certPathBuilder.getRevocationChecker();
revocationChecker.setOptions(EnumSet.of(PKIXRevocationChecker.Option.NO_FALLBACK));

SSLFactory sslFactory = SSLFactory.builder()
        .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray(), trustStore -> {
            PKIXBuilderParameters pkixBuilderParameters = new PKIXBuilderParameters(trustStore, new X509CertSelector());
            pkixBuilderParameters.addCertPathChecker(revocationChecker);
            return new CertPathTrustManagerParameters(pkixBuilderParameters);
        })
        .build();
Loading trust material with TrustManager and OCSP options
X509ExtendedTrustManager trustManager = ...

CertPathBuilder certPathBuilder = CertPathBuilder.getInstance("PKIX");
PKIXRevocationChecker revocationChecker = (PKIXRevocationChecker) certPathBuilder.getRevocationChecker();
revocationChecker.setOptions(EnumSet.of(PKIXRevocationChecker.Option.NO_FALLBACK));

SSLFactory sslFactory = SSLFactory.builder()
        .withTrustMaterial(trustManager, trustStore -> {
            PKIXBuilderParameters pkixBuilderParameters = new PKIXBuilderParameters(trustStore, new X509CertSelector());
            pkixBuilderParameters.addCertPathChecker(revocationChecker);
            return new CertPathTrustManagerParameters(pkixBuilderParameters);
        })
        .build();
Loading trust material with certificates and OCSP options
List<Certificate> certificates = ...

CertPathBuilder certPathBuilder = CertPathBuilder.getInstance("PKIX");
PKIXRevocationChecker revocationChecker = (PKIXRevocationChecker) certPathBuilder.getRevocationChecker();
revocationChecker.setOptions(EnumSet.of(PKIXRevocationChecker.Option.NO_FALLBACK));

SSLFactory sslFactory = SSLFactory.builder()
        .withTrustMaterial(certificates, trustStore -> {
            PKIXBuilderParameters pkixBuilderParameters = new PKIXBuilderParameters(trustStore, new X509CertSelector());
            pkixBuilderParameters.addCertPathChecker(revocationChecker);
            return new CertPathTrustManagerParameters(pkixBuilderParameters);
        })
        .build();
Enhanceable trust validations

By default, the TrustManager ships with default validations to validate if the counterparty is trusted during the SSL Handshake.
If needed the default behaviour can be overruled by custom validators.
If a custom validator is specified and if the condition evaluates to true, then the certificate of the counterparty will be trusted. If the condition evaluates to false, than it will fall back to the default behaviour of the TrustManager.

SSLFactory.builder()
          .withDefaultTrustMaterial()
          .withTrustEnhancer(trustManagerParameters -> {
              X509Certificate[] chain = trustManagerParameters.getChain();
              return chain[0].getIssuerX500Principal().getName().equals("Foo")
                      && chain[0].getSubjectX500Principal().getName().equals("Bar");
          })
          .build();
Hide trusted certificate names of a server

By default, a server exposes the list of trusted certificate names if requested by the client. The list of trusted certificate names can be requested with:

openssl s_client -showcerts -servername 127.0.0.1 -connect 127.0.0.1:8443

The output will be under Acceptable client certificate CA names:
alt text

For some end-user this might lead into information leaks and security risks. This information can be hidden away so the client cannot request it anymore with an additional option within the SSLFactory#withConcealedTrustMaterial(). An example usage would be:

SSLFactory updatedSslFactory = SSLFactory.builder()
      .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
      .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
      .withConcealedTrustMaterial()
      .build();

Which will result into the following output:
alt text

Trusting all certificates without validation, not recommended to use at production!
SSLFactory.builder()
          .withUnsafeTrustMaterial()
          .build();
Skip hostname validation
SSLFactory.builder()
          .withDefaultTrustMaterial()
          .withUnsafeHostnameVerifier()
          .build();
Loading JDK and OS trusted certificates
SSLFactory.builder()
          .withDefaultTrustMaterial()
          .withSystemTrustMaterial()
          .build();
Using specific protocols, ciphers with custom secure random and hostname verifier

If you are using java 11 or newer, than you are also able to use TLSv1.3 as encryption protocol by default.

SSLFactory.builder()
          .withDefaultTrustMaterial()
          .withProtocols("TLSv1.3", "TLSv1.2")
          .withCiphers("TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384", "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384")
          .withHostnameVerifier(hostnameVerifier)
          .withSecureRandom(secureRandom)
          .build();

Enhanceable hostname verifier

If you want to improve or whitelist certain hostnames from the default hostname verifier, you can apply the snippet bellow. If the method body returns true the hostname will be trusted by default

SSLFactory sslFactory = SSLFactory.builder()
          .withDefaultTrustMaterial()
          .withHostnameVerifierEnhancer(parameters -> "localhost".equals(parameters.getHostname()))
          .build();
Support for using multiple identity materials and trust materials
SSLFactory.builder()
          .withIdentityMaterial("identity-1.jks", password)
          .withIdentityMaterial("identity-2.jks", password)
          .withIdentityMaterial("identity-3.jks", password)
          .withIdentityMaterial("identity-4.jks", password)
          .withTrustMaterial("truststore-1.jks", password)
          .withTrustMaterial("truststore-2.jks", password)
          .withTrustMaterial("truststore-3.jks", password)
          .withTrustMaterial("truststore-4.jks", password)
          .build();

In some use cases multiple identities can fail to work. If that happens please try to add the additional SSLFactory option of identity route. See here for more: Routing identity to specific host

Support for using X509ExtendedKeyManager and X509ExtendedTrustManager
X509ExtendedKeyManager keyManager = ...
X509ExtendedTrustManager trustManager = ...

SSLFactory.builder()
          .withIdentityMaterial(keyManager)
          .withTrustMaterial(trustManager)
          .build();
Using dummy identity and trust material

In some use cases it may be useful to use a dummy identity or trust material. An example use case would be to create a base SSLFactory with the dummies which can be swapped afterwords. See below for a refactored version of Support for swapping KeyManager and TrustManager at runtime.

SSLFactory baseSslFactory = SSLFactory.builder()
          .withDummyIdentityMaterial()
          .withDummyTrustMaterial()
          .withSwappableIdentityMaterial()
          .withSwappableTrustMaterial()
          .build();
          
HttpClient httpClient = HttpClient.newBuilder()
          .sslParameters(sslFactory.getSslParameters())
          .sslContext(sslFactory.getSslContext())
          .build()
          
Runnable sslUpdater = () -> {
    SSLFactory updatedSslFactory = SSLFactory.builder()
          .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
          .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
          .build();
    
    SSLFactoryUtils.reload(baseSslFactory, updatedSslFactory);
};

// initial update of ssl material to replace the dummies
sslUpdater.run();
   
// update ssl material every hour    
Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(sslUpdater, 1, 1, TimeUnit.HOURS);

HttpResponse<String> response = httpClient.send(aRequest, HttpResponse.BodyHandlers.ofString());
Support for using a single KeyStore which contains multiple keys with different passwords
KeyStore keyStore = ...
X509ExtendedKeyManager keyManager = KeyManagerUtils.createKeyManager(keyStore, Map.of(
        "foo","foo-password".toCharArray(),
        "bar","bar-password".toCharArray(),
        "lorum-ipsum","lorum-ipsum-password".toCharArray()
));

SSLFactory.builder()
          .withIdentityMaterial(keyManager)
          .withDefaultTrustMaterial()
          .build();
Support for using PrivateKey and Certificates
PrivateKey privateKey = ...
char[] privateKeyPassword = ...
Certificate[] certificateChain = ...

Certificate trustedCertificate = ...

SSLFactory.builder()
          .withIdentityMaterial(privateKey, privateKeyPassword, certificateChain)
          .withTrustMaterial(trustedCertificate)
          .build();
Support for reloading ssl at runtime
Reload identity and trust material

It is possible to reload or update the ssl configuration while already using it with your client or server without the need of restarting your application or recreating it with SSLFactory. The identity and trust material may expire at some point in time and needs to be replaced to be still functional.
Restart of the application with a traditional setup is unavoidable and can result into a downtime for x amount of time. A restart is not needed when using the setup below. The below example is a high-level method of reloading the ssl configuration, if you prefer to use a low-level setup please have a look at the following example displayed here: Hot swap KeyManager and TrustManager at runtime.

SSLFactory baseSslFactory = SSLFactory.builder()
          .withDummyIdentityMaterial()
          .withDummyTrustMaterial()
          .withSwappableIdentityMaterial()
          .withSwappableTrustMaterial()
          .build();
          
HttpClient httpClient = HttpClient.newBuilder()
          .sslParameters(sslFactory.getSslParameters())
          .sslContext(sslFactory.getSslContext())
          .build()
          
Runnable sslUpdater = () -> {
    SSLFactory updatedSslFactory = SSLFactory.builder()
          .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
          .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
          .build();
    
    SSLFactoryUtils.reload(baseSslFactory, updatedSslFactory);
};

// initial update of ssl material to replace the dummies
sslUpdater.run();
   
// update ssl material every hour    
Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(sslUpdater, 1, 1, TimeUnit.HOURS);

HttpResponse<String> response = httpClient.send(aRequest, HttpResponse.BodyHandlers.ofString());

See here for a basic reference implementation for a server: GitHub - Instant SSL Reloading
The code example above cleans the cache instantly which forces any client or server to create a new ssl session and so it requires a new ssl handshake. If you prefer to use existing ssl session for existing connection, but want to use a new ssl session for new clients or servers, then you can use the following snippet below.
In that way existing connections which already have done the ssl handshake won’t require to do another handshake till the ssl session expires with the default timeout.

SSLFactoryUtils.reload(baseSslFactory, updatedSslFactory, false);

See also here for other examples:

Reload ssl parameters

Additionally the SSL parameters can also be reloaded such as ciphers. A basic example is demonstrated below:

SSLFactory sslFactory = SSLFactory.builder()
          .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
          .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
          .withSwappableSslParameters()
          .build();
          
sslFactory.getSslParameters().setCipherSuites(new String[]{"TLS_DHE_RSA_WITH_AES_128_CBC_SHA256"})

Please note that this might not work for all http clients and servers. It works out of the box with Jetty, but for Netty it needs some additional configuration see the code snippet below. It basically depends on how the http client or server uses the ciphers or other ssl properties during the ssl handshake.
Please be aware that this option has some limitations/drawbacks. It might cause other options of a server not to work, so it is advised to test this option in dept. If it breaks your server configuration such as ALPN I would not recommend to use reloadable ssl parameters. Updating your server properties and running a rolling update/restarting your server would be a better option.

The option below might be needed for some servers/clients to reload ssl parameters, for example Netty Server.

SSLFactory sslFactory = ... // your initialized SSLFactory similar to the above one with SwappableSslParameters 
Provider provider = ProviderUtils.create(sslFactory);
Security.insertProviderAt(provider, 1);

// Initialize your server at this point
Support for swapping KeyManager and TrustManager at runtime

It is possible to swap a KeyManager and TrustManager from a SSLContext, SSLSocketFactory and SSLServerSocketFactory while already using it within your client or server at runtime. This option will enable to refresh the identity and trust material of a server or client without the need of restarting your application or recreating it with SSLFactory. The identity and trust material may expire at some point in time and needs to be replaced to be still functional.
Restart of the application with a traditional setup is unavoidable and can result into a downtime for x amount of time. A restart is not needed when using the setup below.

SSLFactory baseSslFactory = SSLFactory.builder()
          .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
          .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
          .withSwappableIdentityMaterial()
          .withSwappableTrustMaterial()
          .build();
          
HttpClient httpClient = HttpClient.newBuilder()
          .sslParameters(sslFactory.getSslParameters())
          .sslContext(sslFactory.getSslContext())
          .build()

// execute https request
HttpResponse<String> response = httpClient.send(aRequest, HttpResponse.BodyHandlers.ofString());

SSLFactory updatedSslFactory = SSLFactory.builder()
          .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
          .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
          .build();
          
// swap identity and trust materials and reuse existing http client
KeyManagerUtils.swapKeyManager(baseSslFactory.getKeyManager().get(), updatedSslFactory.getKeyManager().get());
TrustManagerUtils.swapTrustManager(baseSslFactory.getTrustManager().get(), updatedSslFactory.getTrustManager().get());

// Cleanup old ssl sessions by invalidating them all. Forces to use new ssl sessions which will be created by the swapped KeyManager/TrustManager
SSLSessionUtils.invalidateCaches(baseSslFactory.getSslContext());

HttpResponse<String> response = httpClient.send(aRequest, HttpResponse.BodyHandlers.ofString());

See here for a basic reference implementation for a
server: GitHub - Instant SSL Reloading

Trust additional new certificates at runtime

Although it is possible to reload the complete trust material as shown before
in Reloading SSL at runtime
and Hot swap KeyManager and TrustManager at runtime, in
some occasions you might want the trust additional new certificates without reloading all the trust material as it
might be redundant. Especially if you want to keep other trust material intact which is already loaded to your
SSLFactory and you don’t want it to be reloaded. An example use case would be using the JDK and OS trusted Certificates
Authorities
and your custom truststore which can grow over time. See below for two examples:

Option 1
SSLFactory sslFactory = SSLFactory.builder()
        .withDefaultTrustMaterial()
        .withSystemTrustMaterial()
        .withInflatableTrustMaterial()
        .build();

List<X509Certificate> certificates = ... ; // after some point in time you have a couple of new CA which you want to trust

TrustManagerUtils.addCertificate(sslFactory.getTrustManager().get(), certificates);

With the option below your newly trusted certificates will be also stored on the file-system.
If the file exists then it will first read and append to it. The predicate is thread-safe and can be used for example
prompting the user to trust the certificate if integrated in a GUI.

Option 2
SSLFactory sslFactory = SSLFactory.builder()
        .withDefaultTrustMaterial()
        .withSystemTrustMaterial()
        .withInflatableTrustMaterial(Paths.get("/path/to/truststore.p12"), "password".toCharArray(), "PKCS12", trustManagerParameters -> {
            // do some validation to decide whether to trust this certificate
            return true;
        })
        .build();

A proof-of-concept is available here: GitHub - Trust Me which demonstrates how it can be integrated in a GUI and prompting the end-user to either trust or reject the server certificate. It will be applied instantly and the ssl configuration will be reloaded.

Routing identity material to specific host

It may occur that the client is sending the wrong certificate to the server when using multiple identities. This will
happen when the client certificate has insufficient information for the underlying ssl engine (the KeyManager) and
therefore it cannot select the right certificate.
Recreating the certificates can resolve this issue. However, if that is not possible you can provide an option to the
engine to use a specific certificate for a given server. Below is an example setup for correctly routing the client
identity based on the alias which can be found within the KeyStore file.

SSLFactory.builder()
          .withIdentityMaterial("identity-1.jks", password)
          .withIdentityMaterial("identity-2.jks", password)
          .withTrustMaterial("truststore.jks", password)
          .withIdentityRoute("client-alias-one", "https://localhost:8443/", "https://localhost:8453/")
          .withIdentityRoute("client-alias-two", "https://localhost:8463/", "https://localhost:8473/")
          .build();
Updating identity routes at runtime
SSLFactory sslFactory = SSLFactory.builder()
          .withIdentityMaterial("identity-1.jks", password)
          .withIdentityMaterial("identity-2.jks", password)
          .withTrustMaterial("truststore.jks", password)
          .withIdentityRoute("client-alias-one", "https://localhost:8443/", "https://localhost:8453/")
          .withIdentityRoute("client-alias-two", "https://localhost:8463/", "https://localhost:8473/")
          .build();

X509ExtendedKeyManager keyManager = sslFactory.getKeyManager().get()

// Add additional routes next to the existing ones
KeyManagerUtils.addIdentityRoute(keyManager, "client-alias-one", "https://localhost:8463/", "https://localhost:8473/")

// Override existing routes
KeyManagerUtils.overrideIdentityRoute(keyManager, "client-alias-two", "https://localhost:9463/", "https://localhost:9473/")
Managing ssl session
SSLFactory sslFactory = SSLFactory.builder()
          .withIdentityMaterial("identity.jks", "password".toCharArray())
          .withTrustMaterial("truststore.jks", "password".toCharArray())
          .withSessionTimeout(3600) // Amount of seconds until it will be invalidated
          .withSessionCacheSize(1024) // Amount of bytes until it will be invalidated
          .build();
          
SSLContext sslContext = sslFactory.getSslContext();
          
// Caches can be invalidated with the snippet below
SSLSessionUtils.invalidateCaches(sslContext);

// or any other option:
SSLSessionUtils.invalidateCachesBefore(
        sslContext,
        ZonedDateTime.of(LocalDateTime.of(2021, JANUARY, 1, 15, 55), ZoneOffset.UTC)
);

SSLSessionUtils.invalidateCachesAfter(
        sslContext,
        ZonedDateTime.of(LocalDateTime.of(2021, FEBRUARY, 10, 8, 14), ZoneOffset.UTC)
);

SSLSessionUtils.invalidateCachesBetween(
        sslContext,
        ZonedDateTime.now().minusHours(2),    // from
        ZonedDateTime.now()                   // up till
);
Extracting server certificates
Single server
List<X509Certificate> certificates = CertificateUtils.getCertificatesFromExternalSource("https://github.com/");
Bulk extraction from multiple servers
Map<String, List<X509Certificate>> certificates = CertificateUtils.getCertificatesFromExternalSources(
            "https://github.com/", 
            "https://stackoverflow.com/", 
            "https://www.reddit.com/",
            "https://www.youtube.com/");
Extracting certificates behind proxy
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("my-custom-host", 1234));
List<X509Certificate> certificates = CertificateUtils.getCertificatesFromExternalSource(proxy, "https://github.com/");
Extracting certificates behind proxy with authentication
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("my-custom-host", 1234));
PasswordAuthentication passwordAuthentication = new PasswordAuthentication("foo", "bar".toCharArray());
List<X509Certificate> certificates = CertificateUtils.getCertificatesFromExternalSource(proxy, passwordAuthentication, "https://github.com/");
Extracting certificates as pem

All previous examples are also available for extracting the server certificates as pem. The method has an additional asPem suffix. See below for all of the examples:

// single
List<String> certificates = CertificateUtils.getCertificatesFromExternalSourceAsPem("https://github.com/");

// bulk
Map<String, List<X509Certificate>> urlsToCertificates = CertificateUtils.getCertificatesFromExternalSourcesAsPem(
            "https://github.com/", 
            "https://stackoverflow.com/", 
            "https://www.reddit.com/",
            "https://www.youtube.com/");
    
// proxy        
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("my-custom-host", 1234));
certificates = CertificateUtils.getCertificatesFromExternalSource(proxy, "https://github.com/");

// proxy + authentication
PasswordAuthentication passwordAuthentication = new PasswordAuthentication("foo", "bar".toCharArray());
certificates = CertificateUtils.getCertificatesFromExternalSource(proxy, passwordAuthentication, "https://github.com/");

See here also for a demo application for the CLI: GitHub - Certificate Ripper

Using P7B or PKCS#7 Files

Support for using p7b formatted certificates and certificate-chain from classpath, any directory or as an InputStream.
P7b file is a text file containing a -----BEGIN PKCS7----- as header, -----END PKCS7----- as footer and has a Base64 encoded data between it.

List<Certificate> certificates = CertificateUtils.loadCertificate("certificate.p7b");

SSLFactory.builder()
          .withTrustMaterial(certificates)
          .build();

Using DER Files

Support for using der formatted certificates and certificate-chain from classpath, any directory or as an InputStream.
Der file is a binary form of a certificate. Commonly used extensions are .cer and crt.

List<Certificate> certificates = CertificateUtils.loadCertificate("certificate.cer");

SSLFactory.builder()
          .withTrustMaterial(certificates)
          .build();

Using PFX, P12 or PKCS#12 Files

PFX and p12 are both PKCS#12 type keystores which are supported.

SSLFactory.builder()
          .withIdentityMaterial("identity.p12", "password".toCharArray())
          .withTrustMaterial("truststore.p12", "password".toCharArray())
          .build();

Using PEM Files

Support for using pem formatted private key and certificates from classpath, any directory or as an InputStream.
See PemUtilsShould for
detailed usages.
Add the dependency below to use this feature, it also includes the core features from the library such as SSLFactory.

<dependency>
    <groupId>io.github.hakky54</groupId>
  <artifactId>sslcontext-kickstart-for-pem</artifactId>
  <version>8.3.7</version>
</dependency>
Loading pem files from the classpath
X509ExtendedKeyManager keyManager = PemUtils.loadIdentityMaterial("certificate.pem", "private-key.pem");
X509ExtendedTrustManager trustManager = PemUtils.loadTrustMaterial("some-trusted-certificate.pem");

SSLFactory.builder()
          .withIdentityMaterial(keyManager)
          .withTrustMaterial(trustManager)
          .build();
Loading pem files from anywhere on the filesystem
X509ExtendedKeyManager keyManager = PemUtils.loadIdentityMaterial(Paths.get("/path/to/your/certificate.pem"), Paths.get("/path/to/your/private-key.pem"));
X509ExtendedTrustManager trustManager = PemUtils.loadTrustMaterial(Paths.get("/path/to/your/some-trusted-certificate.pem"));
Loading pem files from InputStream
InputStream privateKey = ...
InputStream certificate = ...
InputStream trustedCertificates = ...

X509ExtendedKeyManager keyManager = PemUtils.loadIdentityMaterial(certificate, privateKey);
X509ExtendedTrustManager trustManager = PemUtils.loadTrustMaterial(trustedCertificates);
Loading pem files from string content
String privateKey =
        "-----BEGIN ENCRYPTED PRIVATE KEY-----\n" +
        "MIIFHDBOBgkqhkiG9w0BBQ0wQTApBgkqhkiG9w0BBQwwHAQIy3Fposf+2ccCAggA\n" +
        "-----END ENCRYPTED PRIVATE KEY-----\n";

String certificate =
        "-----BEGIN CERTIFICATE-----\n" +
        "g0Y2YBH5v0xmi8sYU7weOcwynkjZARpUltBUQ0pWCF5uJsEB8uE8PPDD3c4=\n" +
        "-----END CERTIFICATE-----\n";

String trustedCertificates =
        "-----BEGIN CERTIFICATE-----\n" +
        "CC01zojqS10nGowxzOiqyB4m6wytmzf0QwjpMw==\n" +
        "-----END CERTIFICATE-----\n";

X509ExtendedKeyManager keyManager = PemUtils.parseIdentityMaterial(certificate, privateKey, "secret".toCharArray());
X509ExtendedTrustManager trustManager = PemUtils.parseTrustMaterial(trustedCertificates);
Loading encrypted pem files
X509ExtendedKeyManager keyManager = PemUtils.loadIdentityMaterial("certificate.pem", "private-key.pem", "secret".toCharArray());
Migrating from classic configuration

Below is an example of the classic configuration for enabling ssl for your application.

-Djavax.net.ssl.trustStore=/path/to/truststore.jks
-Djavax.net.ssl.trustStoreType=jks
-Djavax.net.ssl.trustStorePassword=changeit
-Djavax.net.ssl.trustStoreProvider=SunJSSE

-Djavax.net.ssl.keyStore=/path/to/keystore.jks
-Djavax.net.ssl.keyStoreType=jks
-Djavax.net.ssl.keyStorePassword=changeit
-Djavax.net.ssl.keyStoreProvider=SunJSSE

-Dhttps.protocols=TLSv1.3
-Dhttps.cipherSuites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384

SSLFactory can be used with these properties together with the existing properties with the following snippet:

SSLFactory sslFactory = SSLFactory.builder()
        .withSystemPropertyDerivedIdentityMaterial()
        .withSystemPropertyDerivedTrustMaterial()
        .withSystemPropertyDerivedProtocols()
        .withSystemPropertyDerivedCiphers()
        .build();

SSLContext.setDefault(sslFactory.getSslContext());

The SSLFactory returnable values can be supplied to the http client as shown here

Global SSL configuration

If it is not possible to adjust the ssl configuration of a server or client because it is using the default ssl configuration or using a pre-configured, then you can give the snippet below a try.
The snippet below will ensure the default SSLContext will be the one which is constructed by SSLFactory and the Security utility of Java will also use the SSLContext of SSLFactory if it is initialized with SSLContext.getInstance("TLS") or any of the following protocols: SSL, SSLv2, SSLv3, TLSv1, TLSv1.1, TLSv1.2, TLSv1.3
See also a working demo here: Bypassing and overruling SSL configuration of libraries

// The SSLFactory below is just an example, use your own custom initialized one here
SSLFactory sslFactory = SSLFactory.builder()
        .withDefaultTrustMaterial()
        .withSystemTrustMaterial()
        .build();

Provider provider = ProviderUtils.create(sslFactory);
Security.insertProviderAt(provider, 1);
SSLContext.setDefault(sslFactory.getSslContext());
Logging detailed certificate validation
SSLFactory sslFactory = SSLFactory.builder()
        .withTrustMaterial(Paths.get("/path/to/your/truststore.jks"), "password".toCharArray())
        .withLoggingTrustMaterial()
        .build();
        
// run your server or client and analyse the logs

You will get a log message which is similar to the following one:

Validating the certificate chain of the server[google.com:443] with authentication type RSA, while also using the SSLEngine. See below for the full chain of the server:
[[
[
  Version: V3
  Subject: CN=*.google.com, O=Google LLC, L=Mountain View, ST=California, C=US
  Signature Algorithm: SHA256withRSA, OID = 1.2.840.113549.1.1.11

  Key:  Sun EC public key, 256 bits
  public x coord: 54347275970077566368513898626765286548687250565786921039060191273785455056345
  public y coord: 88043846562958291988419087726639688241289668084120802006631053348150453315748
  parameters: secp256r1 [NIST P-256, X9.62 prime256v1] (1.2.840.10045.3.1.7)
  Validity: [From: Wed Oct 16 14:36:57 CEST 2019,
               To: Wed Jan 08 13:36:57 CET 2020]
  Issuer: CN=GTS CA 1O1, O=Google Trust Services, C=US
  SerialNumber: [    a2b1428b 94a636b2 08000000 0019fa68]

Certificate Extensions: 10
[1]: ObjectId: 1.3.6.1.4.1.11129.2.4.2 Criticality=false
Extension unknown: DER encoded OCTET string =
0000: 04 81 F5 04 81 F2 00 F0   00 76 00 B2 1E 05 CC 8B  .........v......
0010: A2 CD 8A 20 4E 87 66 F9   2B B9 8A 25 20 67 6B DA  ... N.f.+..% gk.
0020: FA 70 E7 B2 49 53 2D EF   8B 90 5E 00 00 01 6D D4  .p..IS-...^...m.
0030: C9 39 F6 00 00 04 03 00   47 30 45 02 20 3B E9 89  .9......G0E. ;..
0040: 83 7B 8C F6 11 AC C5 2C   2E 8C 21 E9 DE 24 3F E2  .......,..!..$?.
0050: 3B 46 6C 20 86 36 38 A3   E2 39 89 80 13 02 21 00  ;Fl .68..9....!.
0060: C0 B8 0E AC C3 71 A9 66   B3 49 AE 46 2F FF CE 35  .....q.f.I.F/..5
0070: CE C0 CD 5B 3E AA 3B 33   1B CC A4 7E E2 62 98 78  ...[>.;3.....b.x
0080: 00 76 00 5E A7 73 F9 DF   56 C0 E7 B5 36 48 7D D0  .v.^.s..V...6H..
0090: 49 E0 32 7A 91 9A 0C 84   A1 12 12 84 18 75 96 81  I.2z.........u..
00A0: 71 45 58 00 00 01 6D D4   C9 39 99 00 00 04 03 00  qEX...m..9......
00B0: 47 30 45 02 20 1B 76 BF   FD 79 76 D9 A0 A1 6D F7  G0E. .v..yv...m.
00C0: F2 33 67 55 DD 38 7A F5   98 E0 28 05 25 DD 3D 8B  .3gU.8z...(.%.=.
00D0: A5 91 BC DF 2E 02 21 00   87 81 AD 92 A6 1D 6B A0  ......!.......k.
00E0: 32 75 B8 68 FF 5C D2 F6   FA 11 0E FF 44 2D 7D DB  2u.h.\......D-..
00F0: 9C 1A 27 3A D3 32 CB B7                            ..':.2..


[2]: ObjectId: 1.3.6.1.5.5.7.1.1 Criticality=false
AuthorityInfoAccess [
  [
   accessMethod: ocsp
   accessLocation: URIName: http://ocsp.pki.goog/gts1o1
, 
   accessMethod: caIssuers
   accessLocation: URIName: http://pki.goog/gsr2/GTS1O1.crt
]
]

[3]: ObjectId: 2.5.29.35 Criticality=false
AuthorityKeyIdentifier [
KeyIdentifier [
0000: 98 D1 F8 6E 10 EB CF 9B   EC 60 9F 18 90 1B A0 EB  ...n.....`......
0010: 7D 09 FD 2B                                        ...+
]
]

[4]: ObjectId: 2.5.29.19 Criticality=true
BasicConstraints:[
  CA:false
  PathLen: undefined
]

[5]: ObjectId: 2.5.29.31 Criticality=false
CRLDistributionPoints [
  [DistributionPoint:
     [URIName: http://crl.pki.goog/GTS1O1.crl]
]]

[6]: ObjectId: 2.5.29.32 Criticality=false
CertificatePolicies [
  [CertificatePolicyId: [2.23.140.1.2.2]
[]  ]
  [CertificatePolicyId: [1.3.6.1.4.1.11129.2.5.3]
[]  ]
]

[7]: ObjectId: 2.5.29.37 Criticality=false
ExtendedKeyUsages [
  serverAuth
]

[8]: ObjectId: 2.5.29.15 Criticality=true
KeyUsage [
  DigitalSignature
]

[9]: ObjectId: 2.5.29.17 Criticality=false
SubjectAlternativeName [
  DNSName: *.google.com
]

[10]: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: BA 16 19 65 61 DB B1 32   D3 8E E7 C6 A6 A5 CC A4  ...ea..2........
0010: 3F 19 20 73                                        ?. s
]
]

]
  Algorithm: [SHA256withRSA]
  Signature:
0000: 52 3B 09 75 6D 73 2C 57   CE F5 6B F3 1F A8 5C FD  R;.ums,W..k...\.
0010: 0F F7 78 6D 02 9F DB 19   99 B1 9B A2 A5 42 7A 3B  ..xm.........Bz;
0020: 0C 92 2C 65 F6 36 B8 15   28 5B 63 D2 7A 9D 34 94  ..,e.6..([c.z.4.
0030: 6E 2E 40 82 E0 90 95 BE   B7 27 85 01 8F D7 25 6A  n.@......'....%j
0040: 74 11 06 92 2C 6B 2F E7   D7 D3 AD BD 89 B3 C5 1F  t...,k/.........
0050: 57 9B BB C6 43 79 8B 34   42 41 1C 80 A8 01 77 03  W...Cy.4BA....w.
0060: 10 34 95 C4 B2 67 31 9D   2B 3B 5A 77 9D 96 7C 14  .4...g1.+;Zw....
0070: F4 9A F3 E3 1C 18 08 60   CB 63 E1 17 EB 5C C2 B9  .......`.c...\..
0080: 21 4D 22 05 D7 63 E1 5B   D7 DD A6 E1 46 48 17 7D  !M"..c.[....FH..
0090: 10 54 FA 08 E3 43 DD F2   C7 41 A1 42 F7 EC D2 70  .T...C...A.B...p
00A0: 5E 4A FB 8B 85 2E F4 A1   D1 3E AD 4E 39 72 21 AF  ^J.......>.N9r!.
00B0: B7 5B 9E 7D EB C0 29 91   7C 75 9F F7 7A 94 8C 46  .[....)..u..z..F
00C0: FA 0B F7 A3 E9 49 6D B7   5D FE 68 49 E1 9F 18 B2  .....Im.].hI....
00D0: A0 50 EB 93 8D 71 53 84   A2 34 C4 F8 C9 08 9D 5F  .P...qS..4....._
00E0: 9B 2A 37 5E E0 F8 5D F5   7A 7D BC EB 3D 78 5C 23  .*7^..].z...=x\#
00F0: 84 DD CC 32 97 6C 77 92   7C 06 E4 5D 52 A0 5A 39  ...2.lw....]R.Z9

]]
Logging detailed KeyManager flow, input and output
SSLFactory sslFactory = SSLFactory.builder()
        .withIdentityMaterial(Paths.get("/path/to/your/identity.jks"), "password".toCharArray())
        .withLoggingIdentityMaterial()
        .withDefaultTrustMaterial()
        .build();
        
// run your server or client and analyse the logs

You will get a log message which is similar to the following one:

Attempting to find a client alias for key types [EC], while also using the Socket. See below for list of the issuers:
[CN=some-cn, OU=java-business-unit, O=thunderberry, C=NL]
Attempting to find a client alias for key types [RSA], while also using the Socket. See below for list of the issuers:
[CN=some-cn, OU=java-business-unit, O=thunderberry, C=NL]
Found the following client aliases [my-client-alias] for key types [RSA], while also using the Socket. See below for list of the issuers:
[CN=some-cn, OU=java-business-unit, O=thunderberry, C=NL]
Attempting to get the private key for the alias: my-client-alias
Found a private key for the alias: my-client-alias
Attempting to get the certificate chain for the alias: my-client-alias
Found the certificate chain with a size of 1 for the alias: my-client-alias. See below for the full chain:
[[
[
  Version: V3
  Subject: CN=some-cn, OU=java-business-unit, O=thunderberry, C=NL
  Signature Algorithm: SHA256withRSA, OID = 1.2.840.113549.1.1.11

  Key:  Sun RSA public key, 2048 bits
  params: null
  modulus: 24358361148173123789972454702359337497482540111137434929916055417657354571697209833398713022918665517266658129513432713825681637659966415899913132315999013865220594646161546243646863695313013179456071195691453898185614193141245291456731398570603932104743113343898797041713131938343069988939700047591424592896073860712253945927117061051481828014230668012078029149888844657841672769678941972627103264098329661131121121108364416406527046714029325801099459715576059589001573317998720822010338410175438085716969314224320362271384261147189938038370804394737540861857893390249061609350687279289599644929221019981684263046077
  public exponent: 65537
  Validity: [From: Mon Feb 08 18:14:16 CET 2021,
               To: Thu Feb 06 18:14:16 CET 2031]
  Issuer: CN=some-cn, OU=java-business-unit, O=thunderberry, C=NL
  SerialNumber: [    3a03c719]

Certificate Extensions: 3
[1]: ObjectId: 2.5.29.37 Criticality=false
ExtendedKeyUsages [
  serverAuth
  clientAuth
]

[2]: ObjectId: 2.5.29.15 Criticality=false
KeyUsage [
  DigitalSignature
  Key_Encipherment
  Data_Encipherment
  Key_Agreement
]

[3]: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 6C D2 C6 3D 90 94 1F C9   43 9A A8 A3 41 3E BC 93  l..=....C...A>..
0010: FF E9 00 9E                                        ....
]
]

]
  Algorithm: [SHA256withRSA]
  Signature:
0000: 5F CD B8 0D 27 23 46 81   80 96 A0 E3 4D 79 82 F3  _...'#F.....My..
0010: AC E4 FC 53 B6 8B 17 FD   88 E7 03 DF B5 A6 DC 78  ...S...........x
0020: 75 D7 57 BE 14 C6 12 44   A3 25 E2 9B 2B E1 F1 FA  u.W....D.%..+...
0030: 68 19 19 F3 1B E7 67 17   8F 12 F6 C7 82 CA B7 E2  h.....g.........
0040: F9 66 44 09 3C D7 0F E1   0B FB CF 4B 58 37 79 32  .fD.<......KX7y2
0050: DC E1 E1 CD 97 9B 99 C8   95 DA F3 0E 74 0D 36 7E  ............t.6.
0060: A4 E0 DA BC 66 A0 CD AD   0C BE 6D C5 12 7E F2 6E  ....f.....m....n
0070: AC 89 00 55 1B 1A 23 CA   26 0D B3 B8 E5 52 8C F6  ...U..#.&....R..
0080: 20 D3 ED A3 D7 CD 55 2F   2D EB 07 12 1E 70 C6 0E   .....U/-....p..
0090: 1F 3C AB 8C 23 2F 15 19   A4 F6 4E B0 0E F5 2A D9  .<..#/....N...*.
00A0: E1 F2 50 A9 BC 6D 7A 24   CA CA 07 69 61 0E 55 C5  ..P..mz$...ia.U.
00B0: C3 36 72 2D B8 4A 93 2E   19 45 F9 49 C1 C8 14 15  .6r-.J...E.I....
00C0: 99 C7 06 8D 2A 93 08 87   0B 89 BE 3D 72 01 A5 E7  ....*......=r...
00D0: 97 2A B3 EA 63 92 45 32   D3 58 55 BE BB 69 B8 21  .*..c.E2.XU..i.!
00E0: 5A 98 D2 7D 0B 8D BD 23   A2 3B C3 53 94 5A 54 BA  Z......#.;.S.ZT.
00F0: F2 FD 48 AD 59 F6 E1 CB   86 BF EF 12 0E BD 69 1E  ..H.Y.........i.

]]

Returnable values from the SSLFactory

The SSLFactory provides different kinds of returnable values, see below for all the options:

import nl.altindag.ssl.SSLFactory;
import nl.altindag.ssl.model.KeyStoreHolder;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLServerSocketFactory;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.X509ExtendedKeyManager;
import javax.net.ssl.X509ExtendedTrustManager;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Optional;

public class App {

    public static void main(String[] args) {
        SSLFactory sslFactory = SSLFactory.builder()
                .withIdentityMaterial("keystore.p12", "secret".toCharArray(), "PKCS12")
                .withTrustMaterial("truststore.p12", "secret".toCharArray(), "PKCS12")
                .build();

        SSLContext sslContext = sslFactory.getSslContext();
        HostnameVerifier hostnameVerifier = sslFactory.getHostnameVerifier();
        Optional<X509ExtendedKeyManager> keyManager = sslFactory.getKeyManager();
        Optional<X509ExtendedTrustManager> trustManager = sslFactory.getTrustManager();
        Optional<KeyManagerFactory> keyManagerFactory = sslFactory.getKeyManagerFactory();
        Optional<TrustManagerFactory> trustManagerFactory = sslFactory.getTrustManagerFactory();
        List<X509Certificate> trustedCertificates = sslFactory.getTrustedCertificates();
        SSLSocketFactory sslSocketFactory = sslFactory.getSslSocketFactory();
        SSLServerSocketFactory sslServerSocketFactory = sslFactory.getSslServerSocketFactory();
        SSLEngine sslEngine = sslFactory.getSslEngine(host, port);
        SSLParameters sslParameters = sslFactory.getSslParameters();
        List<String> ciphers = sslFactory.getCiphers();
        List<String> protocols = sslFactory.getProtocols();
    }

}

Additional mappers for specific libraries

Some http clients relay on different ssl classes from third parties and require mapping from SSLFactory to those libraries.
Below you will find the maven dependency which will provide the mapping and also the SSLFactory library.
When using one of the below libraries, it is not required to also explicitly include sslcontext-kickstart into your project. The additional mappers for specific libraries below won’t provide transitive dependencies on Netty, Jetty or Apache. This has been decided to prevent dependency hell on your side.

Netty

Some know http clients which relay on netty libraries are: Spring WebFlux WebClient Netty, Async Http Client and Dispatch Reboot Http Client.

<dependency>
    <groupId>io.github.hakky54</groupId>
  <artifactId>sslcontext-kickstart-for-netty</artifactId>
  <version>8.3.7</version>
</dependency>

Example setup for Spring WebClient with Netty:

import io.netty.handler.ssl.SslContext;
import nl.altindag.ssl.SSLFactory;
import nl.altindag.ssl.netty.util.NettySslUtils;
import org.springframework.http.client.reactive.ReactorClientHttpConnector;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.netty.http.client.HttpClient;

import javax.net.ssl.SSLException;

public class App {
    
    public static void main(String[] args) throws SSLException {
        SSLFactory sslFactory = SSLFactory.builder()
                .withDefaultTrustMaterial()
                .build();

        SslContext sslContext = NettySslUtils.forClient(sslFactory).build();
        HttpClient httpClient = HttpClient.create()
                .secure(sslSpec -> sslSpec.sslContext(sslContext));

        WebClient webClient = WebClient.builder()
                .clientConnector(new ReactorClientHttpConnector(httpClient))
                .build();
    }

}

Jetty

<dependency>
    <groupId>io.github.hakky54</groupId>
  <artifactId>sslcontext-kickstart-for-jetty</artifactId>
  <version>8.3.7</version>
</dependency>

Example setup for Spring WebFlux WebClient Jetty:

import nl.altindag.ssl.SSLFactory;
import nl.altindag.ssl.jetty.util.JettySslUtils;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.util.ssl.SslContextFactory;
import org.springframework.http.client.reactive.JettyClientHttpConnector;
import org.springframework.web.reactive.function.client.WebClient;

public class App {

    public static void main(String[] args) {
        SSLFactory sslFactory = SSLFactory.builder()
                .withDefaultTrustMaterial()
                .build();
        
        SslContextFactory.Client sslContextFactory = JettySslUtils.forClient(sslFactory);
        HttpClient httpClient = new HttpClient(sslContextFactory);

        WebClient webClient = WebClient.builder()
                .clientConnector(new JettyClientHttpConnector(httpClient))
                .build();
    }

}

Apache

Apache 4

Apache Http Client works with javax.net.ssl.SSLContext, so an additional mapping to their library is not required, see here.
However it is still possible to configure the http client with their custom configuration class. you can find below an example configuration for that use case:

<dependency>
    <groupId>io.github.hakky54</groupId>
  <artifactId>sslcontext-kickstart-for-apache4</artifactId>
  <version>8.3.7</version>
</dependency>

import nl.altindag.ssl.SSLFactory;
import nl.altindag.ssl.apache4.util.Apache4SslUtils;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.impl.client.HttpClients;

public class App {

    public static void main(String[] args) {
        SSLFactory sslFactory = SSLFactory.builder()
                .withDefaultTrustMaterial()
                .build();

        LayeredConnectionSocketFactory socketFactory = Apache4SslUtils.toSocketFactory(sslFactory);

        HttpClient httpClient = HttpClients.custom()
                .setSSLSocketFactory(socketFactory)
                .build();
    }

}
Apache 5
<dependency>
    <groupId>io.github.hakky54</groupId>
  <artifactId>sslcontext-kickstart-for-apache5</artifactId>
  <version>8.3.7</version>
</dependency>

import nl.altindag.ssl.SSLFactory;
import org.apache.hc.client5.http.classic.HttpClient;
import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
import org.apache.hc.client5.http.impl.nio.PoolingAsyncClientConnectionManager;
import org.apache.hc.client5.http.impl.nio.PoolingAsyncClientConnectionManagerBuilder;
import org.apache.hc.client5.http.socket.LayeredConnectionSocketFactory;
import nl.altindag.ssl.apache5.util.Apache5SslUtils;

class App {

    public static void main(String[] args) {
        SSLFactory sslFactory = SSLFactory.builder()
                .withDefaultTrustMaterial()
                .build();

        LayeredConnectionSocketFactory socketFactory = Apache5SslUtils.toSocketFactory(sslFactory);
        PoolingHttpClientConnectionManager connectionManager = PoolingHttpClientConnectionManagerBuilder.create()
                .setSSLSocketFactory(socketFactory)
                .build();

        HttpClient httpClient = HttpClients.custom()
                .setConnectionManager(connectionManager)
                .build();

        PoolingAsyncClientConnectionManager asyncConnectionManager = PoolingAsyncClientConnectionManagerBuilder.create()
                .setTlsStrategy(Apache5SslUtils.toTlsStrategy(sslFactory))
                .build();

        CloseableHttpAsyncClient httpAsyncClient = HttpAsyncClients.custom()
                .setConnectionManager(asyncConnectionManager)
                .build();
    }
    
}

Tested HTTP Clients

Below is a list of clients which have already been tested with examples, see in the ClientConfig class and the service directory for detailed configuration

Java

Kotlin

Scala

There is a github project available named Mutual-tls-ssl which provides a tutorial containing steps for setting up these four scenarios:

  • No security
  • One way authentication
  • Two way authentication
  • Two way authentication with trusting the Certificate Authority

It will also explain how to create KeyStores, Certificates, Certificate Signing Requests and how to implement it.

Contributing

There are plenty of ways to contribute to this project:

  • Give it a star
  • Share it with a Tweet
  • Join the Gitter room and leave a feedback or help with answering users questions
  • Submit a PR

Contributors ✨

Thanks goes to these wonderful people (emoji key):


Laurynas
💻 🚧
Philippe Charles
🤔
Tadhg Pearson
🐛
winster
🤔
Pablo Lalloni
🤔
Luis Miguel Ospina
🐛
Jérémie Panzer
🤔

patpatpat123
🤔 🐛
Cody A. Ray
💻
Benoit Tellier
💻
sal0max
🐛
lhstack
🐛
dasteg
🤔
rymsha
🤔

manbucy
🐛 💻
swankjesse
🐛
ivenhov
🐛
ecki
🐛 💻
mbenson
🤔 💻
EugenMayer
🤔
bjorndarri
🤔 💻

henryju
🤔 💻
nquinquenel
🐛 💻
woj-tek
🐛
thahnen
🐛
gerardnorton
🤔
austinarbor
🐛 🤔
ssmoss
🤔

maxxedev
🤔

This project follows the all-contributors specification. Contributions of any kind welcome!