79 lines
2.8 KiB
JavaScript
79 lines
2.8 KiB
JavaScript
const config = {
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namespace: "goauthentik/",
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registryTokenEndpoint: "https://ghcr.io/token",
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registryService: "ghcr.io",
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};
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async function getToken(event) {
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const fetch = await import("node-fetch");
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const querystring = await import("querystring");
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let scope = event.queryStringParameters["scope"];
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let tokenParams = {
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service: config.registryService,
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};
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delete event.headers.host;
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let forwardHeaders = event.headers;
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if (scope && scope.includes(":")) {
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const repo = scope.split(":")[1];
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console.debug(`oci-proxy[token]: original scope: ${scope}`);
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scope = `repository:${config.namespace}${repo}:pull`;
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console.debug(`oci-proxy[token]: rewritten scope: ${scope}`);
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tokenParams["scope"] = scope;
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// We only need to forward headers for authentication requests
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forwardHeaders = {};
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} else {
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console.debug(`oci-proxy[token]: no scope`);
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// For non-scoped requests, we need to forward some URL parameters
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["account", "client_id", "offline_token", "token"].forEach((param) => {
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tokenParams[param] = event.queryStringParameters[param];
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});
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}
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const tokenUrl = `${config.registryTokenEndpoint}?${querystring.stringify(
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tokenParams
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)}`;
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console.debug(`oci-proxy[token]: final URL to fetch: ${tokenUrl}`);
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const tokenRes = await fetch.default(tokenUrl, {
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headers: forwardHeaders,
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});
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const tokenResult = await tokenRes.text();
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console.debug(`oci-proxy[token]: Status ${tokenRes.status}`);
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return {
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statusCode: tokenRes.status,
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body: tokenResult,
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};
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}
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exports.handler = async function (event, context) {
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console.debug(`oci-proxy: URL ${event.httpMethod} ${event.rawUrl}`);
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if (event.queryStringParameters.hasOwnProperty("token")) {
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console.debug("oci-proxy: handler=token proxy");
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return await getToken(event);
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}
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if (
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event.headers.authorization &&
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event.headers.authorization.startsWith("Bearer ")
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) {
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console.debug("oci-proxy: authenticated root handler, returning 200");
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return {
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statusCode: 200,
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headers: {
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"Docker-Distribution-API-Version": "registry/2.0",
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"content-type": "application/json",
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},
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body: JSON.stringify({}),
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};
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}
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console.debug(
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"oci-proxy: root handler, returning 401 with www-authenticate"
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);
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return {
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statusCode: 401,
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headers: {
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"www-authenticate": `Bearer realm="https://${event.headers.host}/v2?token",service="${event.headers.host}",scope="repository:user/image:pull"`,
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"Docker-Distribution-API-Version": "registry/2.0",
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"content-type": "application/json",
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},
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body: JSON.stringify({}),
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};
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};
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