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import { useState } from "react";
import { redirect } from "react-router";
import {
generateRegistrationOptions,
verifyRegistrationResponse,
type RegistrationResponseJSON,
type AuthenticatorTransportFuture,
} from "@simplewebauthn/server";
import type { Route } from "./+types/auth.register";
import { getSession, commitSession } from "~/lib/session.server";
import { saveCredential } from "~/lib/db.server";
import { rpID, rpName, origin } from "~/lib/passkey.server";
export async function loader({ request }: Route.LoaderArgs) {
const session = await getSession(request.headers.get("Cookie"));
if (session.get("authenticated")) return redirect("/");
return {};
}
export async function action({ request }: Route.ActionArgs) {
const url = new URL(request.url);
const intent = url.searchParams.get("intent");
const session = await getSession(request.headers.get("Cookie"));
if (intent === "options") {
const body = await request.json() as { token?: string };
const registerToken = process.env.REGISTER_TOKEN;
if (!registerToken || body.token !== registerToken) {
return Response.json({ error: "トークンが違います" }, { status: 403 });
}
const options = await generateRegistrationOptions({
rpName,
rpID,
userID: new Uint8Array([109, 105, 99, 114, 111, 98, 108, 111, 103]), // "microblog"
userName: "admin",
userDisplayName: "admin",
attestationType: "none",
authenticatorSelection: {
residentKey: "required",
userVerification: "required",
},
});
// hints (L3) と extensions (L2) は古い iOS Safari が処理できないため除外
// また alg: -8 (Ed25519) も互換性のため除外
const { hints: _h, extensions: _e, ...safeOptions } = options as typeof options & { hints?: unknown; extensions?: unknown };
safeOptions.pubKeyCredParams = safeOptions.pubKeyCredParams.filter(
(p) => p.alg === -7 || p.alg === -257
);
session.set("challenge", options.challenge);
return Response.json(safeOptions, {
headers: { "Set-Cookie": await commitSession(session) },
});
}
if (intent === "verify") {
const challenge = session.get("challenge") as string | undefined;
if (!challenge) return Response.json({ error: "セッション切れです" }, { status: 400 });
const body = (await request.json()) as RegistrationResponseJSON;
let verification;
try {
verification = await verifyRegistrationResponse({
response: body,
expectedChallenge: challenge,
expectedOrigin: origin,
expectedRPID: rpID,
});
} catch (err) {
const msg = err instanceof Error ? err.message : String(err);
console.error("[passkey] verifyRegistrationResponse failed:", msg);
return Response.json({ error: msg }, { status: 400 });
}
if (!verification.verified || !verification.registrationInfo) {
return Response.json({ error: "登録に失敗しました" }, { status: 400 });
}
const { credential } = verification.registrationInfo;
saveCredential({
id: credential.id,
publicKey: credential.publicKey,
counter: credential.counter,
transports: (body.response as { transports?: AuthenticatorTransportFuture[] }).transports,
});
session.unset("challenge");
session.set("authenticated", true);
return redirect("/", {
headers: { "Set-Cookie": await commitSession(session) },
});
}
return Response.json({ error: "不正なリクエスト" }, { status: 400 });
}
export default function Register() {
const [token, setToken] = useState("");
const [status, setStatus] = useState<"idle" | "loading" | "error">("idle");
const [errorMsg, setErrorMsg] = useState("");
async function handleRegister() {
setStatus("loading");
setErrorMsg("");
try {
const { startRegistration } = await import("@simplewebauthn/browser");
const optRes = await fetch("/auth/register?intent=options", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ token }),
});
if (!optRes.ok) {
const err = await optRes.json();
throw new Error(err.error ?? "オプション取得に失敗しました");
}
const options = await optRes.json();
const regResponse = await startRegistration({ optionsJSON: options });
const verRes = await fetch("/auth/register?intent=verify", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(regResponse),
});
if (!verRes.ok) {
const err = await verRes.json();
throw new Error(err.error ?? "登録に失敗しました");
}
window.location.href = "/";
} catch (e) {
setStatus("error");
setErrorMsg(e instanceof Error ? `${e.name}: ${e.message}` : String(e));
}
}
return (
<div className="wrap">
<header className="site-header">
<h1>log</h1>
</header>
<div className="auth-box">
<h2>パスキーを登録</h2>
<p>登録トークンを入力してパスキーを作成します。</p>
<input
type="password"
placeholder="登録トークン"
value={token}
onChange={(e) => setToken(e.target.value)}
onKeyDown={(e) => e.key === "Enter" && handleRegister()}
style={{
width: "100%",
marginBottom: ".75rem",
padding: ".5rem .75rem",
border: "1px solid #d1d5db",
borderRadius: "4px",
fontSize: ".875rem",
fontFamily: "ui-monospace, monospace",
}}
/>
<button className="btn" onClick={handleRegister} disabled={status === "loading" || !token}>
{status === "loading" ? "登録中…" : "パスキーを登録"}
</button>
{status === "error" && (
<p className="error-msg" style={{ marginTop: ".75rem" }}>{errorMsg}</p>
)}
</div>
</div>
);
}
|
