| 1 | import { auth0Config, verifyAuth0Token } from './auth0.js';
|
| 2 | import { oauthStore, type OAuthStore } from './oauth-store.js';
|
| 3 |
|
| 4 | export async function callback(request: Request, store: OAuthStore): Promise<Response> {
|
| 5 | let input: { code?: unknown; state?: unknown };
|
| 6 | try {
|
| 7 | input = (await request.json()) as { code?: unknown; state?: unknown };
|
| 8 | } catch {
|
| 9 | return Response.json({ error: 'invalid_request' }, { status: 400 });
|
| 10 | }
|
| 11 | if (
|
| 12 | typeof input.code !== 'string' ||
|
| 13 | typeof input.state !== 'string' ||
|
| 14 | !input.state.startsWith('oc_tx_')
|
| 15 | )
|
| 16 | return Response.json({ error: 'invalid_request' }, { status: 400 });
|
| 17 |
|
| 18 | const transaction = await store.takeTransaction(input.state);
|
| 19 | if (!transaction) return Response.json({ error: 'invalid_transaction' }, { status: 400 });
|
| 20 | const config = auth0Config();
|
| 21 | const redirectUri = `${config.publicOrigin}/sso-callback`;
|
| 22 | const tokenResponse = await fetch(`${config.issuer}oauth/token`, {
|
| 23 | method: 'POST',
|
| 24 | headers: { 'content-type': 'application/x-www-form-urlencoded' },
|
| 25 | body: new URLSearchParams({
|
| 26 | grant_type: 'authorization_code',
|
| 27 | client_id: config.dashboardClientId,
|
| 28 | code: input.code,
|
| 29 | code_verifier: transaction.auth0Verifier,
|
| 30 | redirect_uri: redirectUri,
|
| 31 | }),
|
| 32 | });
|
| 33 | if (!tokenResponse.ok)
|
| 34 | return Response.json({ error: 'identity_exchange_failed' }, { status: 401 });
|
| 35 | const tokens = (await tokenResponse.json()) as { access_token?: unknown };
|
| 36 | if (typeof tokens.access_token !== 'string')
|
| 37 | return Response.json({ error: 'invalid_identity_response' }, { status: 401 });
|
| 38 | const authentication = await verifyAuth0Token(tokens.access_token, { dashboard: true });
|
| 39 | const code = await store.createAuthorizationCode({
|
| 40 | clientId: transaction.clientId,
|
| 41 | operatorId: authentication.payload.sub!,
|
| 42 | redirectUri: transaction.redirectUri,
|
| 43 | scope: transaction.scope,
|
| 44 | codeChallenge: transaction.codeChallenge,
|
| 45 | });
|
| 46 | const downstream = new URL(transaction.redirectUri);
|
| 47 | downstream.searchParams.set('code', code);
|
| 48 | if (transaction.downstreamState)
|
| 49 | downstream.searchParams.set('state', transaction.downstreamState);
|
| 50 | return Response.json(
|
| 51 | { redirectTo: downstream.href },
|
| 52 | { headers: { 'cache-control': 'no-store' } },
|
| 53 | );
|
| 54 | }
|
| 55 |
|
| 56 | export async function POST(request: Request): Promise<Response> {
|
| 57 | try {
|
| 58 | return await callback(request, oauthStore());
|
| 59 | } catch {
|
| 60 | return Response.json({ error: 'callback_failed' }, { status: 500 });
|
| 61 | }
|
| 62 | }
|