Now, we will change (or rather, configure) our Spring Security configuration files, as follows:

@EnableWebSecurity
@Configuration
@EnableGlobalMethodSecurity(securedEnabled = true)
public class SpringSecurityConfig extends WebSecurityConfigurerAdapter {

   @Value("${security.saml2.metadata-url}")
   String metadataUrl;

   @Override
   protected void configure(HttpSecurity http) throws Exception {
      http
               .authorizeRequests()
               .antMatchers("/saml/**").permitAll()
               .anyRequest().authenticated()
               .and()
               .apply(saml())
               .serviceProvider()
               .keyStore()
               .storeFilePath("saml/keystore.jks")
               .password("secret")
               .keyname("spring")
               .keyPassword("secret")
               .and()
               .protocol("https")
               .hostname("localhost:8443")
               .basePath("/")
               .and()
               .identityProvider()
               .metadataFilePath(metadataUrl)
               .and();
   }
}

The file does not have to be modified in any way. It's good to go, through the all-important configure method. In spring-security-saml-dsl-core, the introduction of the saml() method makes coding very concise and easy. With this, you are almost done, and the final step is to create the keystore.