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An OAuth authorization service built using Kotlin
// org.springframework.cloud:spring-cloud-starter-oauth2
// org.springframework.boot:spring-boot-starter-data-jpa
// com.h2database:h2
// redefine: spring-security.version == 4.1.0.RELEASE
package com.example
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.CommandLineRunner
import org.springframework.boot.SpringApplication
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.context.annotation.Bean
import org.springframework.data.jpa.repository.JpaRepository
import org.springframework.security.authentication.AuthenticationManager
import org.springframework.security.core.authority.AuthorityUtils
import org.springframework.security.core.userdetails.User
import org.springframework.security.core.userdetails.UserDetailsService
import org.springframework.security.core.userdetails.UsernameNotFoundException
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer
import org.springframework.web.bind.annotation.RequestMapping
import org.springframework.web.bind.annotation.RestController
import java.security.Principal
import java.util.*
import java.util.stream.Stream
import javax.persistence.Entity
import javax.persistence.GeneratedValue
import javax.persistence.Id
@EnableResourceServer
@EnableAuthorizationServer
@SpringBootApplication
@RestController
open class KotlinAuthenticationServiceApplication :
AuthorizationServerConfigurerAdapter() {
@Autowired
lateinit var authenticationManager: AuthenticationManager
@Bean
open fun userDetailsService(accountRepository: AccountRepository) = UserDetailsService {
username ->
accountRepository.findByUsername(username)
.map { account ->
User (account.username,
account.password,
account.active,
account.active,
account.active,
account.active,
AuthorityUtils.createAuthorityList("SCOPE_READ",
"SCOPE_ADMIN"))
}
.orElseThrow {
UsernameNotFoundException (
"couldn't find the user ${username}!")
}
}
@Bean
open fun sampleDataCLR(accountRepository: AccountRepository): CommandLineRunner =
CommandLineRunner {
Stream.of("jlong,spring", "pwebb,boot", "dsyer,cloud")
.map { s -> s.split(",") }
.forEach { tuple ->
accountRepository.save(
Account(tuple[0], tuple[1], true))
}
}
override fun configure(clients: ClientDetailsServiceConfigurer?) {
clients
?.inMemory()
?.withClient("acme")
?.secret("acmesecret")
?.authorizedGrantTypes("password")
?.scopes("openid")
}
override fun configure(endpoints: AuthorizationServerEndpointsConfigurer?) {
endpoints?.authenticationManager(this.authenticationManager)
}
@RequestMapping ("/user")
open fun user(principal: Principal) = principal
}
fun main(args: Array<String>) {
SpringApplication.run(KotlinAuthenticationServiceApplication::class.java, *args)
}
interface AccountRepository : JpaRepository <Account, Long> {
fun findByUsername(username: String): Optional <Account>
}
@Entity
open class Account(var username: String ? = null,
var password: String ? = null,
var active: Boolean = false) {
constructor() : this(null, null, false)
@Id
@GeneratedValue
var id: Long = 0
}
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