@modelcontextprotocol/sdk
Version:
Model Context Protocol implementation for TypeScript
45 lines • 1.88 kB
JavaScript
import * as z from 'zod/v4';
import { InvalidRequestError, InvalidClientError, ServerError, OAuthError } from '../errors.js';
const ClientAuthenticatedRequestSchema = z.object({
client_id: z.string(),
client_secret: z.string().optional()
});
export function authenticateClient({ clientsStore }) {
return async (req, res, next) => {
try {
const result = ClientAuthenticatedRequestSchema.safeParse(req.body);
if (!result.success) {
throw new InvalidRequestError(String(result.error));
}
const { client_id, client_secret } = result.data;
const client = await clientsStore.getClient(client_id);
if (!client) {
throw new InvalidClientError('Invalid client_id');
}
if (client.client_secret) {
if (!client_secret) {
throw new InvalidClientError('Client secret is required');
}
if (client.client_secret !== client_secret) {
throw new InvalidClientError('Invalid client_secret');
}
if (client.client_secret_expires_at && client.client_secret_expires_at < Math.floor(Date.now() / 1000)) {
throw new InvalidClientError('Client secret has expired');
}
}
req.client = client;
next();
}
catch (error) {
if (error instanceof OAuthError) {
const status = error instanceof ServerError ? 500 : 400;
res.status(status).json(error.toResponseObject());
}
else {
const serverError = new ServerError('Internal Server Error');
res.status(500).json(serverError.toResponseObject());
}
}
};
}
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