Get an ID Token from Okta with Spring Boot

README.md

To Run:

OKTA_OAUTH2_ISSUER=https://{yourOktaDomain}/oauth2/default \
OKTA_OAUTH2_CLIENT-ID={clientId} \
OKTA_OAUTH2_CLIENT-SECRET={clientSecret} \
spring run idtoken.groovy

idtoken.groovy

@Grab('com.okta.spring:okta-spring-boot-starter:1.0.0')

@RestController
class Application {

  @GetMapping('/')
  String home(@org.springframework.security.core.annotation.AuthenticationPrincipal(expression = "idToken") org.springframework.security.oauth2.core.oidc.OidcIdToken idToken) {
    idToken.getTokenValue()
  }
}