Use Keycloak-Realm-Roles for authorization

server/src/main/kotlin/net/keinekekse/app/server/books/booksRoute.kt

@@ -0,0 +1,33 @@
+package books
+
+import books.model.BookRepository
+import io.ktor.http.*
+import io.ktor.server.auth.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import net.keinekekse.app.UserRoles
+import org.koin.ktor.ext.inject
+
+fun Route.booksRoute() {
+    val repository: BookRepository by inject<BookRepository>()
+
+    authenticate(UserRoles.BOOKS_USER.roleName) {
+        route("/books") {
+            get("/books") {
+//                call.respondText("Test DB route")
+                val books = repository.allBooks()
+                call.respond(books)
+            }
+            get("/book/{id}") {
+                // TODO safe toInt conv
+                val id = call.parameters["id"]!!.toInt()
+                repository.bookById(id)?.let { call.respond(it) }
+                    ?: call.respondText(
+                        "Book with id $id not found",
+                        status = HttpStatusCode.NotFound
+                    )
+            }
+
+        }
+    }
+}

server/src/main/kotlin/net/keinekekse/app/server/config/routing.kt

@@ -1,18 +1,19 @@
 package net.keinekekse.app.server.config
 
+import books.booksRoute
 import io.github.oshai.kotlinlogging.KotlinLogging
 import io.ktor.server.application.*
 import io.ktor.server.auth.*
 import io.ktor.server.response.*
 import io.ktor.server.routing.*
+import net.keinekekse.app.UserRoles
 import net.keinekekse.app.server.VERSION
-import net.keinekekse.app.server.testdb.testDbRoute
 
 private val logger = KotlinLogging.logger {}
 
 fun Application.configureRouting() {
     routing {
-        authenticate("auth-KC") {
+        authenticate(UserRoles.BOOKS_USER.roleName) {
             get("/") {
                 val principal = call.principal<AppPrincipal>()
                 call.respondText("user: ${principal?.userId}")
@@ -24,6 +25,6 @@ fun Application.configureRouting() {
             }
         }
 
-        testDbRoute()
+        booksRoute()
     }
 }

server/src/main/kotlin/net/keinekekse/app/server/config/security.kt

@@ -7,6 +7,7 @@ import io.ktor.server.application.*
 import io.ktor.server.auth.*
 import io.ktor.server.auth.jwt.*
 import io.ktor.server.response.*
+import net.keinekekse.app.UserRoles
 import java.net.URI
 
 private val logger = KotlinLogging.logger {}
@@ -25,7 +26,8 @@ fun Application.configureSecurity() {
     val issuer = "$keycloakUrl/$keycloakRealm"
 
     authentication {
-        jwt("auth-KC") {
+        for (role in UserRoles.entries) {
+            jwt(role.roleName) {
                 verifier(
                     UrlJwkProvider(URI(certUrl).toURL()), issuer
                 ) {
@@ -36,7 +38,11 @@ fun Application.configureSecurity() {
                     call.respond(HttpStatusCode.Unauthorized, "Token is not valid or has expired")
                 }
                 validate { credential ->
-                AppPrincipal(credential)
+                    val principal = AppPrincipal(credential)
+                    if (principal.roles.contains(role.roleName) ||
+                        principal.roles.contains(UserRoles.ADMIN.roleName)
+                    ) principal else null
+                }
             }
         }
     }

shared/src/commonMain/kotlin/net/keinekekse/app/UserRoles.kt

@@ -0,0 +1,9 @@
+package net.keinekekse.app
+
+enum class UserRoles(val roleName: String) {
+    ADMIN("admin"),
+    BOOKS_ADMIN("books-admin"),
+    BOOKS_USER("books-user"),
+    BOOKS_EDITOR("books-editor")
+
+}