Generate JWT after spring security kerberos authentication - spring-security

Question

I would like to generate a JWT token after a kerberos authentication.
My kerberos authentication works very well.
Here my spring security kerberos configuration :
#Configuration
#EnableWebMvcSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
#Value("${app.service-principal}")
private String servicePrincipal;
#Value("${app.keytab-location}")
private String keytabLocation;
#Bean
public AuthenticationManager customAuthenticationManager() throws Exception {
return authenticationManager();
}
#Override
protected void configure(HttpSecurity http) throws Exception {
http
.exceptionHandling()
.authenticationEntryPoint(spnegoEntryPoint())
.and()
.authorizeRequests()
.antMatchers("/", "/home").permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginPage("/login").permitAll()
.and()
.logout()
.permitAll()
.and()
.addFilterBefore(
spnegoAuthenticationProcessingFilter(authenticationManagerBean()),
BasicAuthenticationFilter.class);
}
#Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth
.authenticationProvider(kerberosAuthenticationProvider())
.authenticationProvider(kerberosServiceAuthenticationProvider());
}
#Bean
public KerberosAuthenticationProvider kerberosAuthenticationProvider() {
KerberosAuthenticationProvider provider = new KerberosAuthenticationProvider();
SunJaasKerberosClient client = new SunJaasKerberosClient();
client.setDebug(true);
provider.setKerberosClient(client);
provider.setUserDetailsService(dummyUserDetailsService());
return provider;
}
#Bean
public SpnegoEntryPoint spnegoEntryPoint() {
return new SpnegoEntryPoint("/login");
}
#Bean
public SpnegoAuthenticationProcessingFilter spnegoAuthenticationProcessingFilter(
AuthenticationManager authenticationManager) {
SpnegoAuthenticationProcessingFilter filter = new SpnegoAuthenticationProcessingFilter();
filter.setAuthenticationManager(authenticationManager);
return filter;
}
#Bean
public KerberosServiceAuthenticationProvider kerberosServiceAuthenticationProvider() {
KerberosServiceAuthenticationProvider provider = new KerberosServiceAuthenticationProvider();
provider.setTicketValidator(sunJaasKerberosTicketValidator());
provider.setUserDetailsService(dummyUserDetailsService());
return provider;
}
#Bean
public SunJaasKerberosTicketValidator sunJaasKerberosTicketValidator() {
SunJaasKerberosTicketValidator ticketValidator = new SunJaasKerberosTicketValidator();
ticketValidator.setServicePrincipal(servicePrincipal);
ticketValidator.setKeyTabLocation(new FileSystemResource(keytabLocation));
ticketValidator.setDebug(true);
//ticketValidator.setHoldOnToGSSContext(true);
return ticketValidator;
}
#Bean
public DummyUserDetailsService dummyUserDetailsService() {
return new DummyUserDetailsService();
}
}
Is there a simple solution to generate a jwt token after this authentication?
Following my internet search, I found nothing interesting.
Thanks for your answers !