/
Application.kt
83 lines (79 loc) · 2.88 KB
/
Application.kt
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package com.example
import com.auth0.jwk.*
import com.auth0.jwt.*
import com.auth0.jwt.algorithms.*
import io.ktor.application.*
import io.ktor.auth.*
import io.ktor.auth.jwt.*
import io.ktor.features.*
import io.ktor.http.content.*
import io.ktor.request.*
import io.ktor.response.*
import io.ktor.routing.*
import io.ktor.serialization.*
import kotlinx.serialization.Serializable
import java.io.*
import java.security.*
import java.security.interfaces.*
import java.security.spec.*
import java.util.*
import java.util.concurrent.*
@Serializable
data class User(val username: String, val password: String)
fun Application.main() {
install(ContentNegotiation) {
json()
}
val privateKeyString = environment.config.property("jwt.privateKey").getString()
val issuer = environment.config.property("jwt.issuer").getString()
val audience = environment.config.property("jwt.audience").getString()
val myRealm = environment.config.property("jwt.realm").getString()
val jwkProvider = JwkProviderBuilder(issuer)
.cached(10, 24, TimeUnit.HOURS)
.rateLimited(10, 1, TimeUnit.MINUTES)
.build()
install(Authentication) {
jwt("auth-jwt") {
realm = myRealm
verifier(jwkProvider, issuer) {
acceptLeeway(3)
}
validate { credential ->
if (credential.payload.getClaim("username").asString() != "") {
JWTPrincipal(credential.payload)
} else {
null
}
}
}
}
routing {
post("/login") {
val user = call.receive<User>()
// Check username and password
// ...
val publicKey = jwkProvider.get("6f8856ed-9189-488f-9011-0ff4b6c08edc").publicKey
val keySpecPKCS8 = PKCS8EncodedKeySpec(Base64.getDecoder().decode(privateKeyString))
val privateKey = KeyFactory.getInstance("RSA").generatePrivate(keySpecPKCS8)
val token = JWT.create()
.withAudience(audience)
.withIssuer(issuer)
.withClaim("username", user.username)
.withExpiresAt(Date(System.currentTimeMillis() + 60000))
.sign(Algorithm.RSA256(publicKey as RSAPublicKey, privateKey as RSAPrivateKey))
call.respond(hashMapOf("token" to token))
}
authenticate("auth-jwt") {
get("/hello") {
val principal = call.principal<JWTPrincipal>()
val username = principal!!.payload.getClaim("username").asString()
val expiresAt = principal.expiresAt?.time?.minus(System.currentTimeMillis())
call.respondText("Hello, $username! Token is expired at $expiresAt ms.")
}
}
static(".well-known") {
staticRootFolder = File("certs")
file("jwks.json")
}
}
}