Spring WebFlux Netty SSL with Self Signed Certificate

Spring WebFlux Netty SSL with Self Signed Certificate

Configuring SSL with a self-signed certificate in Spring WebFlux with Netty involves a few steps:

  1. Generate a Self-Signed Certificate: You can generate a self-signed certificate using tools like OpenSSL.

  2. Configure SSL in Spring WebFlux: Configure SSL in your Spring WebFlux application.

Here's how you can do it:

First, let's generate a self-signed certificate using OpenSSL:

openssl req -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 365 -out certificate.pem

This command generates a private key key.pem and a self-signed certificate certificate.pem.

Then, in your Spring WebFlux application, you can configure SSL in your Netty server:

import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.server.reactive.ReactorHttpHandlerAdapter; import org.springframework.web.reactive.function.server.RouterFunction; import org.springframework.web.reactive.function.server.RouterFunctions; import org.springframework.web.reactive.function.server.ServerResponse; import reactor.netty.http.server.HttpServer; import java.io.InputStream; import java.security.KeyStore; @Configuration public class WebFluxConfig { @Bean public RouterFunction<ServerResponse> route() { return RouterFunctions.route() .GET("/", request -> ServerResponse.ok().bodyValue("Hello World!")) .build(); } @Bean public HttpServer httpsServer(RouterFunction<ServerResponse> route) throws Exception { // Load the self-signed certificate InputStream keyStoreInputStream = getClass().getResourceAsStream("/certificate.pem"); InputStream trustStoreInputStream = getClass().getResourceAsStream("/certificate.pem"); // Configure the SSL context SslContext sslContext = SslContextBuilder .forServer(keyStoreInputStream, trustStoreInputStream, "password") .build(); // Configure the Netty server return HttpServer.create() .secure(sslContextSpec -> sslContextSpec.sslContext(sslContext)) .port(8443) .handle(new ReactorHttpHandlerAdapter(RouterFunctions.toHttpHandler(route))) .bindNow(); } }

In this example:

  • We load the self-signed certificate (certificate.pem) as an input stream.
  • We configure the SSL context using SslContextBuilder.
  • We configure the Netty server to use SSL with the provided SSL context.
  • The server listens on port 8443.

Remember to replace "password" with the password you used when generating the certificate if you specified one. Additionally, adjust the file paths and port number according to your setup.

This configuration sets up SSL with a self-signed certificate in your Spring WebFlux application using Netty.

Examples

  1. Configuring SSL with Self-Signed Certificate in Spring WebFlux Netty

    • Description: Explains how to configure SSL with a self-signed certificate in Spring WebFlux using Netty as the underlying server.
    • Code:
      import org.springframework.boot.web.embedded.netty.NettyServerCustomizer; import org.springframework.boot.web.server.Ssl; import org.springframework.boot.web.server.WebServerFactoryCustomizer; import org.springframework.stereotype.Component; import reactor.netty.http.server.HttpServer; @Component public class SslCustomizer implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> { @Override public void customize(NettyReactiveWebServerFactory factory) { Ssl ssl = new Ssl(); ssl.setEnabled(true); ssl.setKeyStore("classpath:keystore.p12"); ssl.setKeyStorePassword("password"); factory.addServerCustomizers((NettyServerCustomizer) httpServer -> { httpServer.secure(sslContextSpec -> sslContextSpec.sslContext(SslContextBuilder.forServer(new File("keystore.p12"), "password"))); }); } }

  2. Spring WebFlux Netty SSL configuration with Self-Signed Certificate

    • Description: Provides steps for configuring SSL with a self-signed certificate in Spring WebFlux using Netty.
    • Code:
      import org.springframework.boot.web.embedded.netty.NettyServerCustomizer; import org.springframework.boot.web.server.Ssl; import org.springframework.boot.web.server.WebServerFactoryCustomizer; import org.springframework.stereotype.Component; import reactor.netty.http.server.HttpServer; @Component public class SslCustomizer implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> { @Override public void customize(NettyReactiveWebServerFactory factory) { Ssl ssl = new Ssl(); ssl.setEnabled(true); ssl.setKeyStore("classpath:keystore.p12"); ssl.setKeyStorePassword("password"); factory.addServerCustomizers((NettyServerCustomizer) httpServer -> { httpServer.secure(spec -> spec.sslContext(SslContextBuilder.forServer(new File("keystore.p12"), "password"))); }); } }

  3. Spring WebFlux Netty SSL setup using Self-Signed Certificate

    • Description: Demonstrates the setup of SSL with a self-signed certificate in Spring WebFlux with Netty.
    • Code:
      import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory; import org.springframework.boot.web.server.WebServerFactoryCustomizer; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import reactor.netty.http.server.HttpServer; @Configuration public class NettySslConfiguration { @Bean public WebServerFactoryCustomizer<NettyReactiveWebServerFactory> sslCustomizer() { return factory -> { factory.addServerCustomizers(httpServer -> { httpServer.secure(spec -> spec.sslContext(SslContextBuilder.forServer(new File("keystore.p12"), "password"))); }); }; } }

  4. Spring WebFlux Netty SSL configuration with Self-Signed Certificate

    • Description: Offers a guide to configure SSL with a self-signed certificate in Spring WebFlux using Netty.
    • Code:
      import org.springframework.boot.web.embedded.netty.NettyServerCustomizer; import org.springframework.boot.web.server.Ssl; import org.springframework.boot.web.server.WebServerFactoryCustomizer; import org.springframework.context.annotation.Configuration; import reactor.netty.http.server.HttpServer; @Configuration public class NettySslConfiguration implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> { @Override public void customize(NettyReactiveWebServerFactory factory) { Ssl ssl = new Ssl(); ssl.setEnabled(true); ssl.setKeyStore("classpath:keystore.p12"); ssl.setKeyStorePassword("password"); factory.addServerCustomizers((NettyServerCustomizer) httpServer -> { httpServer.secure(spec -> spec.sslContext(SslContextBuilder.forServer(new File("keystore.p12"), "password"))); }); } }

  5. Setting up SSL with Self-Signed Certificate in Spring WebFlux Netty

    • Description: Describes how to set up SSL with a self-signed certificate in Spring WebFlux using Netty as the underlying server.
    • Code:
      import org.springframework.boot.web.embedded.netty.NettyServerCustomizer; import org.springframework.boot.web.server.Ssl; import org.springframework.boot.web.server.WebServerFactoryCustomizer; import org.springframework.context.annotation.Configuration; import reactor.netty.http.server.HttpServer; @Configuration public class NettySslConfiguration implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> { @Override public void customize(NettyReactiveWebServerFactory factory) { Ssl ssl = new Ssl(); ssl.setEnabled(true); ssl.setKeyStore("classpath:keystore.p12"); ssl.setKeyStorePassword("password"); factory.addServerCustomizers((NettyServerCustomizer) httpServer -> { httpServer.secure(spec -> spec.sslContext(SslContextBuilder.forServer(new File("keystore.p12"), "password"))); }); } }

  6. Spring WebFlux Netty SSL configuration using Self-Signed Certificate

    • Description: Provides steps to configure SSL with a self-signed certificate in Spring WebFlux with Netty.
    • Code:
      import org.springframework.boot.web.embedded.netty.NettyServerCustomizer; import org.springframework.boot.web.server.Ssl; import org.springframework.boot.web.server.WebServerFactoryCustomizer; import org.springframework.context.annotation.Configuration; import reactor.netty.http.server.HttpServer; @Configuration public class NettySslConfiguration implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> { @Override public void customize(NettyReactiveWebServerFactory factory) { Ssl ssl = new Ssl(); ssl.setEnabled(true); ssl.setKeyStore("classpath:keystore.p12"); ssl.setKeyStorePassword("password"); factory.addServerCustomizers((NettyServerCustomizer) httpServer -> { httpServer.secure(spec -> spec.sslContext(SslContextBuilder.forServer(new File("keystore.p12"), "password"))); }); } }

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