initial commit - source

2026-02-03 22:36:35 +01:00
1 parent 003b5501f0
commit e89bb29070
@@ -0,0 +1,80 @@
+package net.keinekekse.app.auth
+
+import kotlinx.coroutines.CompletableDeferred
+import org.koin.core.annotation.Single
+import java.security.MessageDigest
+import java.security.SecureRandom
+import java.util.*
+
+sealed interface AuthResult {
+    class Success : AuthResult
+
+    //    data class Success(val tokens: BearerTokens) : AuthResult
+    data class Error(val code: String, val message: String, val details: String? = null) :
+            AuthResult
+
+    data class Fatal(val code: String, val message: String, val details: String? = null) :
+            AuthResult
+}
+
+@Single
+fun createKeycloakConfig(): KeycloakConfig {
+
+    // TODO muss aus config geholt werden (<--> DI??)
+
+    val keycloakServerHostname = "kec.keinekekse.net"
+    val keycloakRealm = "app-server-realm"
+    val keycloakClient = "pkce-book-app"
+
+    return KeycloakConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+}
+
+class KeycloakConfig(
+    val keycloakServerHostname: String,
+    keycloakRealm: String,
+    val keycloakClient: String,
+) {
+    companion object {
+        const val LOCALHOST = "127.0.0.1"
+        const val CALLBACK_PATH = "/callback"
+        const val SCOPE = "openid"
+        const val PKCE_METHOD = "S256"
+
+        // TODO die Hash-Berechnung ist nicht portabel, die beiden fn müssen je Platform implementiert werden
+        fun generateRandomString(): String {
+            val bytes = ByteArray(64)
+            SecureRandom().nextBytes(bytes)
+            return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes)
+        }
+
+        fun generateCodeChallenge(codeVerifier: String): String {
+            val bytes = codeVerifier.toByteArray(Charsets.US_ASCII)
+            val digest = MessageDigest.getInstance("SHA-256").digest(bytes)
+            return Base64.getUrlEncoder().withoutPadding().encodeToString(digest)
+        }
+    }
+
+    private val keycloakBaseUrl = "/realms/$keycloakRealm/protocol/openid-connect"
+
+    val authorizationEndpoint = "$keycloakBaseUrl/auth"
+    val tokenEndpoint = "$keycloakBaseUrl/token"
+    val certificatesEndpoint = "$keycloakBaseUrl/certs"
+    val userinfoEndpoint = "$keycloakBaseUrl/userinfo"
+
+}
+
+internal class AuthRun(val kc: KeycloakConfig) {
+    val codeVerifier = KeycloakConfig.generateRandomString()
+    val codeChallenge = KeycloakConfig.generateCodeChallenge(codeVerifier)
+    val csrfProtectionState = KeycloakConfig.generateRandomString()
+
+    val resultDeferred = CompletableDeferred<AuthResult>()
+    private var redirectUri_: String? = null
+    val redirectUri: String
+        get() = redirectUri_
+            ?: throw IllegalStateException("redirectUri not set, can only be when embedded server is running")
+
+    fun buildRedirectUri(port: Int) {
+        redirectUri_ = "http://${KeycloakConfig.LOCALHOST}:$port${KeycloakConfig.CALLBACK_PATH}"
+    }
+}
@@ -0,0 +1,453 @@
+package net.keinekekse.app.auth
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.auth.providers.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.client.request.forms.*
+import io.ktor.client.statement.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.cio.*
+import io.ktor.server.engine.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import io.ktor.utils.io.core.Closeable
+import kotlinx.coroutines.delay
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import net.keinekekse.app.service.TokenService
+import org.koin.core.annotation.Single
+import java.awt.Desktop
+import java.net.Socket
+import kotlin.use
+
+@Single
+class Authenticator(
+//    @Property("kc_server") keycloakServerHostname: String,
+//    @Property("kc_realm") keycloakRealm: String,
+//    @Property("kc_client") keycloakClient: String,
+    val tokenService: TokenService,
+    private val keycloakConfig: KeycloakConfig,
+) : Closeable {
+    private val httpClient = HttpClient {
+        install(ContentNegotiation) { json() }
+        install(HttpTimeout) {
+            requestTimeoutMillis = 10000
+            connectTimeoutMillis = 5000
+        }
+    }
+
+//    private val keycloakConfig =
+//        KeycloakConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+
+    override fun close() = httpClient.close()
+
+    suspend fun authenticate(): AuthResult {
+        val config = AuthRun(keycloakConfig)
+
+        if (!testServerConnection(config)) {
+            return AuthResult.Error("ERR001", "Der Anmeldeserver ist nicht erreichbar.", "")
+        }
+        var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
+        try {
+            server = createCallbackServer(config).start(wait = false)
+            val port = server.engine.resolvedConnectors().first().port
+            config.buildRedirectUri(port)
+            if (!waitForServer(port)) {
+                return AuthResult.Fatal(
+                    "ERR008",
+                    "Schwerer Fehler",
+                    "Der interne Webserver konnte nicht gestartet werden. Keine Anmeldung möglich."
+                )
+            }
+
+            openAuthorizationInBrowser(config)
+
+            return config.resultDeferred.await()
+
+        } catch (e: Exception) {
+            return AuthResult.Error(
+                "ERR002",
+                "Bei der Anmeldung ist ein Fehler aufgetreten",
+                e.message ?: "Unbekannter Fehler"
+            )
+        } finally {
+            server?.stop(1000, 2000)
+        }
+    }
+
+    suspend fun requestRefreshToken(tokens: BearerTokens?): BearerTokens? {
+        val config = AuthRun(keycloakConfig)
+
+        val response = httpClient.submitForm(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.tokenEndpoint
+            }.toString(),
+            formParameters = parameters {
+                append("grant_type", "refresh_token")
+                append("client_id", config.kc.keycloakClient)
+                append("refresh_token", tokens?.refreshToken ?: "")
+            }
+        )
+        val result = validateRequestTokenResponse(response)
+        when (result.first) {
+            is AuthResult.Success -> {
+                tokenService.setTokens(result.second)
+                return result.second
+            }
+
+            else -> {
+                tokenService.setTokens(null)
+                return null
+            }
+        }
+    }
+
+    private fun isPortOpen(port: Int): Boolean =
+        try {
+            // TODO Socket ist nicht portabel (JVM only)
+            Socket(KeycloakConfig.LOCALHOST, port).use { true }
+        } catch (e: Exception) {
+            // Port is closed or unreachable
+            println("${e.javaClass.simpleName}: ${e.message}")
+            false
+        }
+
+    private suspend fun waitForServer(port: Int, timeoutSeconds: Int = 3): Boolean {
+        repeat(timeoutSeconds * 10) {
+            if (isPortOpen(port)) return true
+            delay(100)
+        }
+        return false
+    }
+
+    private fun openAuthorizationInBrowser(config: AuthRun) {
+        val authorizationUrl = buildAuthorizationUrl(config)
+
+        // TODO momentan nur für JVM, Rest ist noch zu eruieren
+        if (!Desktop.isDesktopSupported()) {
+            throw IllegalStateException("Desktop API not supported (cannot open browser automatically).")
+        }
+        val desktop = Desktop.getDesktop()
+        if (!desktop.isSupported(Desktop.Action.BROWSE)) {
+            throw IllegalStateException("BROWSE action not supported (cannot open browser automatically).")
+        }
+
+        desktop.browse(authorizationUrl.toURI())
+    }
+
+    private fun buildAuthorizationUrl(config: AuthRun): Url = buildUrl {
+        protocol = URLProtocol.HTTPS
+        host = config.kc.keycloakServerHostname
+        encodedPath = config.kc.authorizationEndpoint
+        parameters.append("response_type", "code")
+        parameters.append("client_id", config.kc.keycloakClient)
+        parameters.append("redirect_uri", config.redirectUri)
+        parameters.append("scope", KeycloakConfig.SCOPE)
+        parameters.append("state", config.csrfProtectionState)
+        parameters.append("code_challenge", config.codeChallenge)
+        parameters.append("code_challenge_method", KeycloakConfig.PKCE_METHOD)
+    }
+
+    private fun createCallbackServer(config: AuthRun) =
+        embeddedServer(CIO, port = 0, host = KeycloakConfig.LOCALHOST) {
+            routing {
+                get(KeycloakConfig.CALLBACK_PATH) {
+                    val code = call.request.queryParameters["code"]
+
+                    var authResult =
+                        validateAuthorizationRequest(call.request, config.csrfProtectionState)
+
+                    if (authResult is AuthResult.Success) {
+                        authResult = requestTokens(config, code)
+                    }
+
+                    val (text, status) = createGoodByeMessage(authResult)
+                    call.respondText(text, contentType = ContentType.Text.Html, status = status)
+
+                    if (!config.resultDeferred.isCompleted)
+                        config.resultDeferred.complete(authResult)
+                }
+            }
+        }
+
+    private fun htmlEscape(value: String): String =
+        value.replace("&", "&amp;")
+            .replace("<", "&lt;")
+            .replace(">", "&gt;")
+            .replace("\"", "&quot;")
+            .replace("'", "&#39;")
+
+    private fun createGoodByeMessage(authResult: AuthResult): Pair<String, HttpStatusCode> {
+        var text = ""
+        var status = HttpStatusCode.BadRequest
+        when (authResult) {
+            is AuthResult.Success -> {
+                text =
+                    "<html><body><h1>Login erfolgreich! Du kannst das Fenster schließen.</h1></body></html>"
+                status = HttpStatusCode.OK
+            }
+
+            is AuthResult.Error -> {
+                text = "<html><body><h1>Fehler bei der Anmeldung.</h1><h2>${
+                    htmlEscape(authResult.message)
+                }</h2><h3>${htmlEscape(authResult.details ?: "")}</h3></body></html>"
+                status = HttpStatusCode.BadRequest
+            }
+
+            is AuthResult.Fatal -> {
+                text =
+                    "<html><body><h1>Schwerer Fehler.</h1><h2>${htmlEscape(authResult.message)}</h2><h3>${
+                        htmlEscape(authResult.details ?: "")
+                    }</h3></body></html>"
+                status = HttpStatusCode.InternalServerError
+            }
+        }
+        return Pair(text, status)
+    }
+
+    private fun validateAuthorizationRequest(
+        request: RoutingRequest,
+        csrfProtectionState: String,
+    ): AuthResult {
+        /*
+        - state != csrfProt -> Fehler: Kommunikation mit dem Anmeldeserver hat nicht geklappt,
+                                       könnte auf Malware hindeuten, Abbruch
+          throw Fatal error authenticating user -> exit app
+        - wenn error =! null -> error + error_description anzeigen
+          rc NULL == keine auth -> app muss entscheiden
+        - code == null -> Fehler: Server liefert ungültige Daten,
+                                  könnte auf Probleme bei der Netzwerkverbindung oder beim Anmeldeserver hindeuten
+          rc NULL -> app
+         */
+        if (request.queryParameters["error"] != null) {
+            return AuthResult.Error(
+                "ERR004",
+                "Fehler bei der Anmeldung",
+                "${request.queryParameters["error"]}: ${request.queryParameters["error_description"] ?: ""}"
+            )
+        }
+        if (request.queryParameters["state"] != csrfProtectionState) {
+            return AuthResult.Fatal(
+                "ERR005",
+                "Schwerer Fehler",
+                "CSRF-Fehler in der Kommunikation mit dem Anmeldeserver. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+            )
+        }
+        return AuthResult.Success()
+    }
+
+    /* Antwort von Keycloak:
+    {
+    "access_token": "eyJhbG ...
+    "expires_in": 300,
+    "refresh_expires_in": 0,
+    "refresh_token": "eyJhb ...
+    "token_type": "Bearer",
+    "id_token": "eyJ ...
+    "not-before-policy": 1769817270,
+    "session_state": "YhlNjIuW-lk1aQwwD9xm4edJ",
+    "scope": "openid profile email"
+    }
+    */
+
+    @Serializable
+    data class TokenResponse(
+        @SerialName("access_token") val accessToken: String,
+        @SerialName("expires_in") val expiresIn: Int,
+        @SerialName("refresh_expires_in") val refreshExpiresIn: Int,
+        @SerialName("refresh_token") val refreshToken: String,
+        @SerialName("token_type") val tokenType: String,
+        @SerialName("id_token") val idToken: String?,
+        @SerialName("not-before-policy") val notBeforePolicy: Int?,
+        @SerialName("session_state") val sessionState: String?,
+        val scope: String,
+    )
+
+    @Serializable
+    data class TokenErrorResponse(
+        @SerialName("error") val error: String,
+        @SerialName("error_description") val errorDescription: String?,
+        @SerialName("session_state") val sessionState: String?,
+    )
+
+    private suspend fun requestTokens(config: AuthRun, authCode: String?): AuthResult {
+        if (authCode == null) {
+            return AuthResult.Fatal(
+                "ERR003",
+                "Schwerer Fehler",
+                "Der Anmeldeserver lieferte ungültige Daten. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+            )
+        }
+        val response: HttpResponse = httpClient.submitForm(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.tokenEndpoint
+            }.toString(),
+            formParameters = parameters {
+                append("grant_type", "authorization_code")
+                append("client_id", config.kc.keycloakClient)
+                append("code", authCode)
+                append("redirect_uri", config.redirectUri)
+                append("code_verifier", config.codeVerifier)
+            }
+        )
+        val result = validateRequestTokenResponse(response)
+        when (result.first) {
+            is AuthResult.Success -> {
+                tokenService.setTokens(result.second)
+            }
+
+            else -> {
+                tokenService.setTokens(null)
+            }
+        }
+        return result.first
+    }
+
+    suspend fun validateRequestTokenResponse(response: HttpResponse): Pair<AuthResult, BearerTokens?> {
+        if (response.status != HttpStatusCode.OK) {
+            try {
+                val errorResponse = response.body<TokenErrorResponse>()
+                return Pair(
+                    AuthResult.Error(
+                        "ERR006",
+                        "HTTP-Fehler ${response.status.value} beim Abholen der Zugriffstoken",
+                        "${errorResponse.error}: ${errorResponse.errorDescription ?: ""}"
+                    ), null
+                )
+            } catch (e: Exception) {
+                // Fehler beim JSON-Konvertieren
+                val errorResponse = response.bodyAsText()
+                return Pair(
+                    AuthResult.Error(
+                        "ERR006",
+                        "HTTP-Fehler ${response.status.value} beim Abholen der Zugriffstoken",
+                        errorResponse
+                    ), null
+                )
+            }
+        }
+        val tokenResponse: TokenResponse = try {
+            response.body<TokenResponse>()
+        } catch (e: Exception) {
+            // Fehler beim JSON-Konvertieren
+            return Pair(
+                AuthResult.Fatal(
+                    "ERR007",
+                    "Schwerer Fehler",
+                    "Ungültige Daten beim Abholen der Zugriffstoken. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+                ), null
+            )
+        }
+
+        return Pair(
+            AuthResult.Success(),
+            BearerTokens(
+                tokenResponse.accessToken,
+                tokenResponse.refreshToken
+            )
+        )
+    }
+
+//    suspend fun requestUserInfo(
+//        accessToken: String,
+//    ) {
+//        val config = AuthenticationConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+//
+//        val response = httpClient.get(
+//            url = buildUrl {
+//                protocol = URLProtocol.HTTPS
+//                host = config.keycloakServerHostname
+//                path(config.userinfoEndpoint)
+//            },
+////            formParameters = parameters {
+////                append("grant_type", "refresh_token")
+////                append("client_id", config.keycloakClient)
+////                append("refresh_token", refreshToken)
+////            }
+//        ) {
+//            headers { append("Authorization", "Bearer $accessToken") }
+//        }
+//
+//        println("Status: ${response.status}")
+//        println("Body: ${response.bodyAsText()}")
+//
+//    }
+
+    private suspend fun testServerConnection(config: AuthRun): Boolean {
+        val response: HttpResponse = httpClient.request(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.certificatesEndpoint
+            }
+        )
+        return response.status.value < 400
+    }
+
+    /*
+    access token:
+
+{
+  "exp": 1769839803,
+  "iat": 1769839503,
+  "auth_time": 1769839502,
+  "jti": "onrtac:f0ea9436-470d-7d1d-fd9d-b43d2f075c46",
+  "iss": "https://kec.keinekekse.net/realms/app-server-realm",
+  "aud": "account",
+  "sub": "b5b40fa3-468f-443c-8eb0-e220bdd353bc",
+  "typ": "Bearer",
+  "azp": "pkce-book-app",
+  "sid": "n_TeXWIUSV66OkYwoc0D1og9",
+  "acr": "1",
+  "allowed-origins": [
+    "http://127.0.0.1",
+    "https://kas.keinekekse.net"
+  ],
+  "realm_access": {
+    "roles": [
+      "offline_access",
+      "default-roles-app-server-realm",
+      "uma_authorization",
+      "book-admin"
+    ]
+  },
+  "resource_access": {
+    "account": {
+      "roles": [
+        "manage-account",
+        "manage-account-links",
+        "view-profile"
+      ]
+    }
+  },
+  "scope": "openid profile email",
+  "email_verified": true,
+  "name": "Hartmut Bauer",
+  "preferred_username": "hb42",
+  "given_name": "Hartmut",
+  "family_name": "Bauer",
+  "email": "hb242@pm.me"
+}
+
+-> realm_access:
+
+            implementation(libs.ktor.serverAuthJwt)
+
+        val decod = JWT().decodeJwt(tokenResponse.accessToken!!)
+        // claims, die nur String enthalten: getClaim("claim-name")
+        // für andere: "{" -> asMap<String, Any> => cast!
+        //             "[" -> asList(Class<T>)
+        val roles: List<String> = decod.getClaim("realm_access").asMap()["roles"] as List<String>
+        roles.forEach { println(it) }
+
+
+     */
+}
@@ -0,0 +1,166 @@
+package net.keinekekse.app
+
+//import org.koin.plugin.module.dsl.startKoin
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Text
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.keinekekse.app.auth.AuthResult
+import net.keinekekse.app.auth.Authenticator
+import net.keinekekse.app.books.di.KoinApp
+import net.keinekekse.app.ui.ProgressIndicator
+import org.koin.compose.koinInject
+import org.koin.plugin.module.dsl.startKoin
+
+//@PropertyValue("kc_server")
+//var keycloakServer: String = ""
+//
+//@PropertyValue("kc_realm")
+//var keycloakRealm: String = ""
+//
+//@PropertyValue("kc_client")
+//var keycloakClient: String = ""
+
+fun main() = application {
+
+    startKoin<KoinApp>()
+
+//    keycloakServer = "kec.keinekekse.net"
+//    keycloakRealm = "app-server-realm"
+//    keycloakClient = "pkce-book-app"
+
+//    val inj = koinInject<String>(named("AppString"))
+
+    val authResultState = remember { mutableStateOf<AuthResult?>(null) }
+
+    val authenticator: Authenticator = koinInject()
+
+    LaunchedEffect(Unit) {
+        authResultState.value = withContext(Dispatchers.IO) {
+            // TODO - (~) Verständnis für App-Aufbau und DI
+            //      - (x) das object muss global angelegt werden -> DI singleton
+            //      - (x) globale Speicherung der Tokens
+            //      - Tokens persistieren? Multiplatform! (evtl. library)
+            //      - (x) globaler httpClient mit Konfig für Tokens -> DI
+            //      - (x) Error-Handling: 401 -> refresh -> 401 -> reauth [implizit]
+//            Authenticator(
+//                "kec.keinekekse.net",
+//                "app-server-realm",
+//                "pkce-book-app",
+//            ).use {
+
+            val result = authenticator.authenticate()
+
+            when (result) {
+                is AuthResult.Success -> {
+//                    println("Access Token: ${result.tokens?.accessToken}")
+//                    println("Refresh Token: ${result.tokens?.refreshToken}")
+
+//                        delay(3000)
+                    /*
+                    // klappt, gibt aber nicht mehr her, als ohnehin im Token steht
+                    it.requestUserInfo(result.tokens!!.accessToken)
+                    */
+                    /*
+                    // funktioniert -> jetzt fehlt die DI-Mimik für die compose app
+                    when (val res = it.requestRefreshToken(result.tokens)) {
+                        is AuthResult.Success -> {
+                            println("Access Token: ${res.tokens?.accessToken}")
+                            println("Refresh Token: ${res.tokens?.refreshToken}")
+                        }
+
+                        is AuthResult.Error -> {
+                            println("Refresh Token fehlgeschlagen ${res.code}: ${res.details ?: ""}")
+                        }
+
+                        is AuthResult.Fatal -> {
+                            println("Refresh Token fehlgeschlagen ${res.code}: ${res.details ?: ""}")
+
+                        }
+                    }
+                    */
+                }
+
+                else -> {}
+            }
+
+            result
+            //  }
+        }
+    }
+    Window(
+        onCloseRequest = ::exitApplication,
+        title = "app",
+    ) {
+        when (val result = authResultState.value) {
+            null -> {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    verticalArrangement = Arrangement.Center
+                ) {
+                    Text("Warten auf Anmeldung...")
+
+//                    Icon(
+//                        imageVector = Icons.Default.HourglassTop,
+//                        contentDescription = "Home",
+//                        modifier = Modifier.padding(top = 16.dp).size(32.dp)
+//                    )
+                    ProgressIndicator()
+                }
+            }
+
+            is AuthResult.Error -> {
+                // TODO show an error UI (and maybe a retry button)
+                Text("Fehler bei der Anmeldung: ${result.message} (${result.code})")
+                Text("Fehlerbeschreibung: ${result.details ?: ""}")
+//                App()
+            }
+
+            is AuthResult.Fatal -> {
+                Text("Fataler Fehler bei der Anmeldung: ${result.message} (${result.code})")
+                Text("Fehlerbeschreibung: ${result.details ?: ""}")
+            }
+
+            is AuthResult.Success -> {
+                val test = koinInject<TestAuth>()
+                CoroutineScope(Dispatchers.Default).launch {
+                    println("requesting '/'")
+                    test.request("/")
+                }
+                App()
+            }
+        }
+    }
+}
+//
+//@Composable
+//fun ProgressIndicator(animationSize: Int = 48, paddingTop: Int = 16, strokeWidth: Int = 5) {
+//    val primaryColor = MaterialTheme.colorScheme.primary
+//    val backgroundColor = MaterialTheme.colorScheme.background
+//    val strokewidth = strokeWidth.dp
+//    CircularProgressIndicator(
+//        modifier =
+//            Modifier.padding(top = paddingTop.dp).size(animationSize.dp).drawBehind {
+//                drawCircle(
+//                    primaryColor,
+//                    radius = size.width / 2 - strokewidth.toPx() / 2,
+//                    style = Stroke(strokewidth.toPx()),
+//
+//                    )
+//            },
+//        color = backgroundColor,
+//        strokeWidth = strokewidth
+//    )
+//}
@@ -0,0 +1,22 @@
+package net.keinekekse.app.service
+
+import io.ktor.client.*
+import io.ktor.client.plugins.auth.*
+import io.ktor.client.plugins.auth.providers.*
+import net.keinekekse.app.auth.Authenticator
+import org.koin.core.annotation.Single
+
+@Single
+fun createHttpClient(authenticator: Authenticator) = HttpClient {
+    install(Auth) {
+        bearer {
+            loadTokens {
+                authenticator.tokenService.getTokens()
+            }
+            refreshTokens {
+                authenticator.requestRefreshToken(oldTokens)
+                authenticator.tokenService.getTokens()
+            }
+        }
+    }
+}
@@ -0,0 +1,20 @@
+package net.keinekekse.app.service
+
+import io.ktor.client.plugins.auth.providers.*
+import org.koin.core.annotation.Single
+
+@Single
+class TokenService {
+    private var tokens: BearerTokens? = null
+
+    // TODO persist tokens
+
+    fun getTokens(): BearerTokens? = tokens
+    fun setTokens(tokens: BearerTokens? = null) {
+        this.tokens = tokens
+        println("set tokens")
+        println("Access Token: ${tokens?.accessToken}")
+        println("Refresh Token: ${tokens?.refreshToken}")
+    }
+
+}