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stub.js
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const https = require('https');
const fs = require('fs');
const url = require('url');
const fetch = require('node-fetch');
const util = require('util');
// const exec = util.promisify(require('child_process').exec);
const crypto = require('crypto');
const { privateKey, publicKey } = crypto.generateKeyPairSync('rsa', {
modulusLength: 2048,
publicKeyEncoding: {
type: 'pkcs1',
format: 'pem'
},
privateKeyEncoding: {
type: 'pkcs1',
format: 'pem'
}
});
const TLS_DIR = '../tls';
const SERVER_NAME = process.env.HOST || 'server';
const SERVER_HOST = process.env.SERVER_HOST || `${SERVER_NAME}.docker`;
const SERVER_ROOT = `https://${SERVER_HOST}`;
const USER = `einstein`;
const PROVIDER_ID = SERVER_HOST;
const MESH_PROVIDER = SERVER_HOST;
const PROPFIND_RESPONSE = `\
<?xml version="1.0"?>\
<d:multistatus xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns" xmlns:oc="http://owncloud.org/ns" xmlns:nc="http://nextcloud.org/ns">\
<d:response>\
<d:href>/webdav-api/</d:href>\
<d:propstat>\
<d:prop>\
<d:getlastmodified>Tue, 07 Jan 2025 08:26:30 GMT</d:getlastmodified>\
<d:getcontentlength>164</d:getcontentlength>\
<d:getcontenttype>text/plain</d:getcontenttype>\
<oc:permissions>RGNVW</oc:permissions>\
<d:resourcetype/>\
<d:getetag>"b134a68c554798adf769917887321c83"</d:getetag>\
</d:prop>\
<d:status>HTTP/1.1 200 OK</d:status>\
</d:propstat>\
<d:propstat>\
<d:prop>\
<x1:share-permissions xmlns:x1="http://open-collaboration-services.org/ns"/>\
<d:quota-available-bytes/>\
</d:prop>\
<d:status>HTTP/1.1 404 Not Found</d:status>\
</d:propstat>\
</d:response>\
</d:multistatus>\
`;
// const HTTPS_OPTIONS = {
// key: fs.readFileSync(`/etc/letsencrypt/live/${SERVER_HOST}/privkey.pem`),
// cert: fs.readFileSync(`/etc/letsencrypt/live/${SERVER_HOST}/cert.pem`),
// ca: fs.readFileSync(`/etc/letsencrypt/live/${SERVER_HOST}/chain.pem`)
// }
const HTTPS_OPTIONS = {
key: fs.readFileSync(`${TLS_DIR}/${SERVER_NAME}.key`),
cert: fs.readFileSync(`${TLS_DIR}/${SERVER_NAME}.crt`)
}
const grants = {
'localhost': {
'123456': 'asdfgh'
},
'ocmstub1.docker': {
'123456': 'asdfgh'
},
'ocmstub2.docker': {
'123456': 'asdfgh'
},
'nextcloud1.docker': {
'123456': 'asdfgh'
},
'nextcloud2.docker': {
'123456': 'asdfgh'
},
'owncloud1.docker': {
'123456': 'asdfgh'
},
'owncloud2.docker': {
'123456': 'asdfgh'
},
'ocis1.docker': {
'123456': 'asdfgh'
},
'ocis2.docker': {
'123456': 'asdfgh'
},
'cernbox1.docker': {
'123456': 'asdfgh'
},
'cernbox2.docker': {
'123456': 'asdfgh'
}
}
function sendHTML(res, text) {
res.end(`<!DOCTYPE html><html><head></head><body>${text}</body></html>`);
}
// singleton global, naively assume only one share exists at a time:
let mostRecentShareIn = {};
async function sign(message) {
const data = Buffer.from(message);
const signature = await crypto.sign('RSA-SHA256', data, privateKey).toString('base64');
console.log('signed', signature);
return signature;
}
async function check(message, signature) {
console.log('SENDER VERIFY', message, signature, publicKey);
const data = Buffer.from(message);
const verify = await crypto.verify('RSA-SHA256', data, publicKey, Buffer.from(signature, 'base64'));
console.log('verify done', verify);
return verify;
}
async function verify(message, signature, fqdn) {
const senderConfig = await getServerConfigForServer(fqdn);
const senderPubKey = senderConfig.config.publicKey;
console.log('fetched sender pub key', senderConfig, senderPubKey);
console.log('RECIPIENT VERIFY', message, signature, senderPubKey);
const data = Buffer.from(message);
const verify = await crypto.verify('RSA-SHA256', data, senderPubKey, Buffer.from(signature, 'base64'));
console.log('verify done', verify);
return verify;
}
async function getServerFqdnForUser(otherUser) {
console.log('getServerFqdnForUser', otherUser);
let otherServer = otherUser.split('@').splice(1).join('@').replace('\/', '/');
console.log(otherServer);
if (otherServer.startsWith('http://')) {
otherServer = otherServer.substring('http://'.length);
} else if (otherServer.startsWith('https://')) {
otherServer = otherServer.substring('http://'.length);
}
if (otherServer.endsWith('/')) {
otherServer = otherServer.substring(0, otherServer.length - 1);
}
return otherServer;
}
async function getServerConfigForServer(fqdn) {
console.log('fetching', `https://${fqdn}/ocm-provider/`);
const configResult = await fetch(`https://${fqdn}/ocm-provider/`);
// const text = await configResult.text();
// console.log({ text });
// JSON.parse(text);
return { config: await configResult.json(), fqdn };
}
async function getServerConfigForUser(otherUser) {
const fqdn = await getServerFqdnForUser(otherUser);
return getServerConfigForServer(fqdn);
}
async function notifyProvider(obj, notif) {
console.log('notifyProvider', obj, notif);
// FIXME: reva sets no `sender` and no `sender`
// and sets `owner` to a user opaqueId only (e.g. obj.owner: '4c510ada-c86b-4815-8820-42cdf82c3d51').
// what we ultimately need when a share comes from reva is obj.meshProvider, e.g.: 'revad1.docker'.
const { config } = await getServerConfigForUser(obj.sender || obj.sender || /* obj.owner || */ `${obj.owner}@${obj.meshProvider}`);
if (config.endPoint.substr(-1) == '/') {
config.endPoint = config.endPoint.substring(0, config.endPoint.length - 1);
}
const postRes = await fetch(`${config.endPoint}/notifications`, {
method: 'POST',
body: JSON.stringify(notif)
});
console.log('notification sent!', postRes.status, await postRes.text());
}
async function forwardInvite(invite) {
console.log('forwardInvite', invite);
const { config, fqdn } = await getServerConfigForUser(invite);
console.log('discovered', config, fqdn);
if (!config.endPoint) {
config.endPoint = process.env.FORCE_ENDPOINT;
}
const inviteSpec = {
invite: {
token: invite.split('@')[0],
userId: 'marie',
recipientProvider: 'stub2.docker',
name: 'Marie Curie',
email: '[email protected]',
}
}
let endPoint = config.endPoint || config.endpoint;
if (endPoint.substr(-1) == '/') {
endPoint = endPoint.substring(0, endPoint.length - 1);
}
console.log('posting', `${endPoint}/invites/accept`, JSON.stringify(inviteSpec, null, 2))
const postRes = await fetch(`${endPoint}/invites/accept`, {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(inviteSpec, null, 2),
});
console.log('invite forwarded', postRes.status, await postRes.text());
}
function getDigest(body) {
return 'SHA-256=' + crypto.createHash('sha256').update(body).digest('base64');
}
async function generateSignatureHeaders(body, endPoint, method) {
const urlObj = new URL(endPoint);
const path = urlObj.pathname;
const target = `${method.toLowerCase()} ${path}`;
const digest = getDigest(body);
const headers = {
'request-target': target,
'content-length': body.length.toString(),
host: urlObj.host,
date: new Date().toUTCString(),
digest
};
const message = Object.values(headers).join('\n');
const signed = await sign(message);
const checked = await check(message, signed);
console.log({ checked });
headers.signature = [
`keyId="${SERVER_HOST}"`,
`algorithm="rsa-sha256"`,
`headers="${Object.keys(headers)}"`,
`signature="${signed}"`
].join(',');
return headers;
}
async function createShare(consumer) {
console.log('createShare', consumer);
// config={
// endPoint: 'https://example.com/'
// };
const { config, fqdn } = await getServerConfigForUser(consumer);
// console.log(config);
if (!config.endPoint) {
config.endPoint = process.env.FORCE_ENDPOINT;
}
const shareSpec = {
shareWith: consumer,
name: 'Test share from stub',
providerId: PROVIDER_ID,
meshProvider: MESH_PROVIDER,
owner: `${USER}@${SERVER_HOST}`,
ownerDisplayName: USER,
sender: `${USER}@${SERVER_HOST}`,
senderDisplayName: USER,
shareType: 'user',
resourceType: 'file',
code: '123456',
protocol: {
name: 'webdav',
options: {
sharedSecret: 'shareMeNot'
},
webdav: {
sharedSecret: 'shareMeNot',
URI: 'https://localhost/webdav-api/file.txt'
}
}
}
console.log(shareSpec, shareSpec.protocol);
if (config.endPoint.endsWith('/')) {
config.endPoint = config.endPoint.substring(0, config.endPoint.length - 1);
}
const body = JSON.stringify(shareSpec, null, 2);
const sharesEndpoint = `${config.endPoint}/shares`;
const headers = await generateSignatureHeaders(body, sharesEndpoint, 'POST');
headers['content-type'] = 'application/json';
console.log('signature headers generated', headers);
const postRes = await fetch(`${config.endPoint}/shares`, {
method: 'POST',
headers,
body,
});
console.log('outgoing share created!', postRes.status, await postRes.text());
return fqdn;
}
function expectHeader(headers, name, expected) {
if (headers[name] === expected) {
console.log(`header ${name} OK`, expected);
} else {
console.log(`header ${name} missing or wrong`, JSON.stringify(headers), expected);
}
}
function checkExpectedHeaders(received, expected, onesToCheck) {
onesToCheck.forEach(name => expectHeader(received, name, expected[name]));
}
async function fetchAccessToken(tokenEndpoint, code) {
const body = JSON.stringify({
grant_type: `ocm_authorization_code`,
code,
client_id: SERVER_HOST,
}, null, 2);
const headers = await generateSignatureHeaders(body, tokenEndpoint, 'POST');
headers['content-type'] = 'application/json';
const tokenResult = await fetch(tokenEndpoint, {
method: 'POST',
body,
headers
});
const response = await tokenResult.json();
console.log('got token response', response);
return response;
}
async function checkSignature(bodyIn, headersIn, url, method) {
const urlObj = new URL(url);
const target = `${method.toLowerCase()} ${urlObj.pathname}`;
console.log('checking signature');
const digest = getDigest(bodyIn);
const headers = {
'request-target': target,
'content-length': bodyIn.length.toString(),
host: SERVER_HOST,
date: headersIn.date,
digest
};
const message = Object.values(headers).join('\n');
console.log(message);
checkExpectedHeaders(headersIn, headers, ['request-target', 'content-length', 'host', 'digest']);
// 1 2 3 4
const rx = /^keyId=\"(.*)\"\,algorithm=\"(.*)\"\,headers\=\"(.*)\",signature\=\"(.*)\"$/g;
const parsed = rx.exec(headersIn.signature);
console.log(parsed);
const fqdn = parsed[1];
const signature = parsed[4];
const verified = await verify(message, signature, fqdn);
console.log({ verified, fqdn });
if (verified) {
return fqdn;
}
}
const server = https.createServer(HTTPS_OPTIONS, async (req, res) => {
console.log(req.method, req.url, req.headers);
let bodyIn = '';
req.on('data', (chunk) => {
console.log('CHUNK', chunk.toString());
bodyIn += chunk.toString();
});
req.on('end', async () => {
try {
if (req.url === '/ocm/token') {
const signingServer = await checkSignature(bodyIn, req.headers, `https://${SERVER_HOST}${req.url}`, 'POST');
console.log('token request', bodyIn, signingServer);
let params;
try {
params = JSON.parse(bodyIn);
} catch (e) {
res.writeHead(400);
sendHTML(res, 'Cannot parse JSON');
return;
}
if (typeof grants[params.client_id] !== 'object') {
res.writeHead(403);
sendHTML(res, `no grants found for client ${params.client_id}`);
return;
}
if (typeof grants[params.client_id][params.code] !== 'string') {
res.writeHead(403);
sendHTML(res, `grant ${params.code} not found for client ${params.client_id}`);
return;
}
const token = grants[params.code];
res.setHeader('content-type', 'application/json');
res.end(JSON.stringify({
access_token: grants[params.client_id][params.code],
token_type: 'bearer',
expires_in: 3600,
refresh_token: 'qwertyuiop',
}));
} else if (((req.url === '/webdav-api/') || (req.url === '/public.php/webdav/')) && (req.method === 'PROPFIND')) {
console.log('PROPFIND', req.headers['authorization']);
// if (req.headers['authorization'] === `Bearer asdfgh`) {
res.setHeader('Content-Type', 'application/xml; charset=utf-8');
res.writeHead(207);
res.end(PROPFIND_RESPONSE);
// } else if (typeof req.headers['authorization'] === 'string') {
// res.writeHead(403);
// res.end('No access, sorry\n');
// } else {
// res.writeHead(401);
// res.end('Please use a short-lived bearer for this API. You can exchange the code from the share at the token endpoint using httpsig\n');
// }
} else if (req.url === '/webdav-api/file.txt') {
console.log('API access', req.headers['authorization']);
if (req.headers['authorization'] === `Bearer asdfgh`) {
res.end('The content of the file, well done!');
} else if (typeof req.headers['authorization'] === 'string') {
res.writeHead(403);
res.end('No access, sorry\n');
} else {
res.writeHead(401);
res.end('Please use a short-lived bearer for this API. You can exchange the code from the share at the token endpoint using httpsig\n');
}
} else if (req.url === '/ocm-provider/' || req.url === '/.well-known/ocm') {
console.log(`yes ${req.url}`);
res.setHeader('content-type', 'application/json');
res.end(JSON.stringify({
enabled: true,
apiVersion: '1.0-proposal1',
endPoint: `${SERVER_ROOT}/ocm`,
resourceTypes: [
{
name: 'file',
shareTypes: [ 'user', 'group' ],
protocols: { webdav: '/webdav-api/' }
}
],
publicKey
}));
} else if (req.url === '/ocm/shares') {
console.log('yes /ocm/shares');
try {
mostRecentShareIn = JSON.parse(bodyIn);
} catch (e) {
res.writeHead(400);
sendHTML(res, 'Cannot parse JSON');
return;
}
if (typeof req.headers['signature'] === 'string') {
const signingServer = await checkSignature(bodyIn, req.headers, `https://${SERVER_HOST}${req.url}`, 'POST');
const claimedServer = await getServerFqdnForUser(mostRecentShareIn.sender);
if (signingServer !== claimedServer) {
console.log('ALARM! Claimed server does not match signing server', claimedServer, signingServer);
}
if (mostRecentShareIn?.code) {
console.log('code received! exchanging it for token...', mostRecentShareIn?.code);
const { config, fqdn } = await getServerConfigForServer(claimedServer);
const urlObj = new URL(config.endPoint, `https://${fqdn}`);
const tokenEndpoint = `${urlObj.href}/token`;
console.log('token endpoint discovered', tokenEndpoint);
const token = await fetchAccessToken(tokenEndpoint, mostRecentShareIn?.code);
console.log('will now use token to access webdav', token);
const result = await fetch(mostRecentShareIn?.protocol?.webdav?.URI, {
headers: {
authorization: `Bearer ${token.access_token}`
}
});
console.log('API accessed', result.status, await result.text());
}
} else {
console.log('unsigned request to create share');
}
// {
// shareWith: "admin@https:\/\/stub1.pdsinterop.net",
// shareType: "user",
// name: "Reasons to use Nextcloud.pdf",
// resourceType: "file",
// description:"",
// providerId:202,
// owner: "alice@https:\/\/nc1.pdsinterop.net\/",
// ownerDisplayName: "alice",
// sender: "alice@https:\/\/nc1.pdsinterop.net\/",
// senderDisplayName":"alice",
// "protocol":{
// "name":"webdav",
// "options":{
// "sharedSecret":"lvns5N9ZXm1T1zx",
// "permissions":"{http:\/\/open-cloud-mesh.org\/ns}share-permissions"
// }
// }
// }
// obj.id = obj.providerId;
res.writeHead(201, {
'Content-Type': 'application/json'
});
res.end(JSON.stringify({
"recipientDisplayName": "Marie Curie"
}, null, 2));
} else if (req.url.startsWith('/publicLink')) {
console.log('yes publicLink');
const urlObj = new URL(req.url, SERVER_ROOT);
if (urlObj.search.startsWith('?saveTo=')) {
console.log('creating share', urlObj.search);
const otherServerRoot = await createShare(decodeURIComponent(urlObj.search).substring('?saveTo='.length));
res.writeHead(301, {
location: otherServerRoot
});
sendHTML(res, `Redirecting you to ${otherServerRoot}`);
} else {
sendHTML(res, 'yes publicLink, saveTo?');
}
} else if (req.url.startsWith('/forwardInvite')) {
console.log('yes forwardInvite');
const urlObj = new URL(req.url, SERVER_ROOT);
await forwardInvite(decodeURIComponent(urlObj.search).substring('?'.length));
sendHTML(res, 'yes forwardInvite');
} else if (req.url.startsWith('/shareWith')) {
console.log('yes shareWith');
const urlObj = new URL(req.url, SERVER_ROOT);
await createShare(decodeURIComponent(urlObj.search).substring('?'.length));
sendHTML(res, 'yes shareWith');
} else if (req.url.startsWith('/acceptShare')) {
console.log('yes acceptShare');
try {
console.log('Creating notif to accept share, obj =', mostRecentShareIn);
const notif = {
type: 'SHARE_ACCEPTED',
resourceType: mostRecentShareIn.resourceType,
providerId: mostRecentShareIn.providerId,
notification: {
sharedSecret: (
mostRecentShareIn.protocol ?
(
mostRecentShareIn.protocol.options ?
mostRecentShareIn.protocol.options.sharedSecret :
undefined
) :
undefined
),
message: 'Recipient accepted the share'
}
};
notifyProvider(mostRecentShareIn, notif);
} catch (e) {
console.error(e);
sendHTML(res, `no acceptShare - fail`);
}
sendHTML(res, 'yes acceptShare');
} else if (req.url.startsWith('/deleteAcceptedShare')) {
console.log('yes deleteAcceptedShare');
const notif = {
type: 'SHARE_DECLINED',
message: 'I don\'t want to use this share anymore.',
id: mostRecentShareIn.id,
createdAt: new Date()
};
// When unshared from the provider side:
// {
// "notificationType":"SHARE_UNSHARED",
// "resourceType":"file",
// "providerId":"89",
// "notification":{
// "sharedSecret":"N7epqXHRKXWbg8f",
// "message":"File was unshared"
// }
// }
console.log('deleting share', mostRecentShareIn);
try {
notifyProvider(mostRecentShareIn, notif);
} catch (e) {
sendHTML(res, `no deleteAcceptedShare - fail ${provider}ocm-provider/`);
}
sendHTML(res, 'yes deleteAcceptedShare');
} else if (req.url.startsWith('/?')) {
console.log('yes /', mostRecentShareIn);
if (req.url.indexOf('session=active') != -1) {
sendHTML(res, `<form method="get">
<input type="submit" value="Log out">
</form> /` + JSON.stringify(mostRecentShareIn, null, 2));
} else {
sendHTML(res, `<form method="get">
<input type="hidden" name="session" value="active">
<input type="submit" value="Log in">
</form> /` + JSON.stringify(mostRecentShareIn, null, 2));
}
} else if (req.url.startsWith('/meshdir?')) {
const queryObject = url.parse(req.url, true).query;
console.log(queryObject);
const config = {
nextcloud1: "https://nextcloud1.docker/index.php/apps/sciencemesh/accept",
owncloud1: "https://owncloud1.docker/index.php/apps/sciencemesh/accept",
nextcloud2: "https://nextcloud2.docker/index.php/apps/sciencemesh/accept",
owncloud2: "https://owncloud2.docker/index.php/apps/sciencemesh/accept",
stub2: "https://stub.docker/ocm/invites/forward",
revad2: undefined
};
const items = [];
const scriptLines = [];
Object.keys(config).forEach(key => {
if (typeof config[key] === "string") {
items.push(` <li><a id="${key}">${key}</a></li>`);
scriptLines.push(` document.getElementById("${key}").setAttribute("href", "${config[key]}"+window.location.search);`);
} else {
const params = new URLSearchParams(req.url.split('?')[1]);
console.log(params);
const token = params.get('token');
const providerDomain = params.get('providerDomain');
items.push(` <li>${key}: Please run <tt>ocm-invite-forward -idp ${providerDomain} -token ${token}</tt> in Reva's CLI tool.</li>`);
}
})
console.log('meshdir', mostRecentShareIn);
sendHTML(res, `Welcome to the meshdir stub. Please click a server to continue to:\n<ul>${items.join('\n')}</ul>\n<script>\n${scriptLines.join('\n')}\n</script>\n`);
} else {
console.log('not recognized');
sendHTML(res, `OK ${req.url}`);
}
} catch (e) {
console.error(e);
}
});
});
server.listen(443);
console.log(`Browse to https://${SERVER_HOST}/ocm-provider/ or https://${SERVER_HOST}/shareWith?bob@${SERVER_HOST}`);