goldilocks.js/packages/apis/com.daplie.goldilocks/index.js

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'use strict';
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module.exports.dependencies = [ 'OAUTH3', 'storage.owners', 'options.device' ];
module.exports.create = function (deps, conf) {
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var scmp = require('scmp');
var crypto = require('crypto');
var jwt = require('jsonwebtoken');
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var bodyParser = require('body-parser');
var jsonParser = bodyParser.json({
inflate: true, limit: '100kb', reviver: null, strict: true /* type, verify */
});
function handleCors(req, res, methods) {
if (!methods) {
methods = ['GET', 'POST'];
}
if (!Array.isArray(methods)) {
methods = [ methods ];
}
res.setHeader('Access-Control-Allow-Origin', req.headers.origin || '*');
res.setHeader('Access-Control-Allow-Methods', methods.join(', '));
res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
if (req.method.toUpperCase() === 'OPTIONS') {
res.setHeader('Allow', methods.join(', '));
res.end();
return true;
}
if (methods.indexOf('*') >= 0) {
return false;
}
if (methods.indexOf(req.method.toUpperCase()) < 0) {
res.statusCode = 405;
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({ error: { message: 'method '+req.method+' not allowed', code: 'EBADMETHOD'}}));
return true;
}
}
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function isAuthorized(req, res, fn) {
var auth = jwt.decode((req.headers.authorization||'').replace(/^bearer\s+/i, ''));
if (!auth) {
res.statusCode = 401;
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res.setHeader('Content-Type', 'application/json;');
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res.end(JSON.stringify({ error: { message: "no token", code: 'E_NO_TOKEN', uri: undefined } }));
return;
}
var id = crypto.createHash('sha256').update(auth.sub).digest('hex');
return deps.storage.owners.exists(id).then(function (exists) {
if (!exists) {
res.statusCode = 401;
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res.setHeader('Content-Type', 'application/json;');
res.end(JSON.stringify({ error: { message: "not authorized", code: 'E_NO_AUTHZ', uri: undefined } }));
return;
}
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req.userId = id;
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fn();
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});
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}
function checkPaywall() {
var PromiseA = require('bluebird');
var testDomains = [
'daplie.com'
, 'duckduckgo.com'
, 'google.com'
, 'amazon.com'
, 'facebook.com'
, 'msn.com'
, 'yahoo.com'
];
// While this is not being developed behind a paywall the current idea is that
// a paywall will either manipulate DNS queries to point to the paywall gate,
// or redirect HTTP requests to the paywall gate. So we check for both and
// hope we can detect most hotel/ISP paywalls out there in the world.
return PromiseA.resolve()
.then(function () {
var dns = PromiseA.promisifyAll(require('dns'));
var proms = testDomains.map(function (dom) {
return dns.resolve6Async(dom)
.catch(function (err) {
if (err.code === 'ENODATA') {
return dns.resolve4Async(dom);
} else {
return PromiseA.reject(err);
}
})
.then(function (result) {
return result[0];
});
});
return PromiseA.all(proms).then(function (addrs) {
var unique = addrs.filter(function (value, ind, self) {
return value && self.indexOf(value) === ind;
});
// It is possible some walls might have exceptions that leave some of the domains
// we test alone, so we might have more than one unique address even behind an
// active paywall.
return unique.length < addrs.length;
});
})
.then(function (paywall) {
if (paywall) {
return paywall;
}
var request = deps.request.defaults({
followRedirect: false
, headers: {
connection: 'close'
}
});
var proms = testDomains.map(function (dom) {
return request('https://'+dom).then(function (resp) {
if (resp.statusCode >= 300 && resp.statusCode < 400) {
return resp.headers.location;
} else {
return 'https://'+dom;
}
});
});
return PromiseA.all(proms).then(function (urls) {
var unique = urls.filter(function (value, ind, self) {
return value && self.indexOf(value) === ind;
});
return unique.length < urls.length;
});
})
;
}
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return {
init: function (req, res) {
if (handleCors(req, res, ['GET', 'POST'])) {
return;
}
if ('POST' !== req.method) {
// It should be safe to give the list of owner IDs to an un-authenticated
// request because the ID is the sha256 of the PPID and shouldn't be reversible
return deps.storage.owners.all().then(function (results) {
var ids = results.map(function (owner) {
return owner.id;
});
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify(ids));
});
}
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jsonParser(req, res, function () {
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return deps.PromiseA.resolve().then(function () {
console.log('init POST body', req.body);
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var auth = jwt.decode((req.headers.authorization||'').replace(/^bearer\s+/i, ''));
var token = jwt.decode(req.body.access_token);
var refresh = jwt.decode(req.body.refresh_token);
auth.sub = auth.sub || auth.acx.id;
token.sub = token.sub || token.acx.id;
refresh.sub = refresh.sub || refresh.acx.id;
// TODO validate token with issuer, but as-is the sub is already a secret
var id = crypto.createHash('sha256').update(auth.sub).digest('hex');
var tid = crypto.createHash('sha256').update(token.sub).digest('hex');
var rid = crypto.createHash('sha256').update(refresh.sub).digest('hex');
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var session = {
access_token: req.body.access_token
, token: token
, refresh_token: req.body.refresh_token
, refresh: refresh
};
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console.log('ids', id, tid, rid);
if (req.body.ip_url) {
// TODO set options / GunDB
conf.ip_url = req.body.ip_url;
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}
return deps.storage.owners.all().then(function (results) {
console.log('results', results);
var err;
// There is no owner yet. First come, first serve.
if (!results || !results.length) {
if (tid !== id || rid !== id) {
err = new Error(
"When creating an owner the Authorization Bearer and Token and Refresh must all match"
);
err.statusCode = 400;
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return deps.PromiseA.reject(err);
}
console.log('no owner, creating');
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return deps.storage.owners.set(id, session);
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}
console.log('has results');
// There are onwers. Is this one of them?
if (!results.some(function (token) {
return scmp(id, token.id);
})) {
err = new Error("Authorization token does not belong to an existing owner.");
err.statusCode = 401;
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return deps.PromiseA.reject(err);
}
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console.log('has correct owner');
// We're adding an owner, unless it already exists
if (!results.some(function (token) {
return scmp(tid, token.id);
})) {
console.log('adds new owner with existing owner');
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return deps.storage.owners.set(tid, session);
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}
}).then(function () {
res.setHeader('Content-Type', 'application/json;');
res.end(JSON.stringify({ success: true }));
});
})
.catch(function (err) {
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res.setHeader('Content-Type', 'application/json;');
res.statusCode = err.statusCode || 500;
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res.end(JSON.stringify({ error: { message: err.message, code: err.code, uri: err.uri } }));
});
});
}
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, tunnel: function (req, res) {
if (handleCors(req, res)) {
return;
}
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isAuthorized(req, res, function () {
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if ('POST' !== req.method) {
res.setHeader('Content-Type', 'application/json');
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return deps.tunnelClients.get(req.userId).then(function (result) {
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res.end(JSON.stringify(result));
}, function (err) {
res.statusCode = 500;
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res.end(JSON.stringify({ error: { message: err.message, code: err.code, uri: err.uri } }));
});
}
return deps.storage.owners.get(req.userId).then(function (session) {
return deps.tunnelClients.start(session).then(function () {
res.setHeader('Content-Type', 'application/json;');
res.end(JSON.stringify({ success: true }));
}, function (err) {
res.setHeader('Content-Type', 'application/json;');
res.statusCode = 500;
res.end(JSON.stringify({ error: { message: err.message, code: err.code, uri: err.uri } }));
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});
});
});
}
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, config: function (req, res) {
if (handleCors(req, res)) {
return;
}
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isAuthorized(req, res, function () {
if ('POST' !== req.method) {
res.setHeader('Content-Type', 'application/json;');
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res.end(JSON.stringify(deps.recase.snakeCopy(conf)));
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return;
}
jsonParser(req, res, function () {
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console.log('config POST body', req.body);
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// Since we are sending the changes to another process we don't really
// have a good way of seeing if it worked, so always report success
deps.storage.config.save(req.body);
res.setHeader('Content-Type', 'application/json;');
res.end('{"success":true}');
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});
});
}
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, request: function (req, res) {
if (handleCors(req, res, '*')) {
return;
}
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isAuthorized(req, res, function () {
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jsonParser(req, res, function () {
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deps.request({
method: req.body.method || 'GET'
, url: req.body.url
, headers: req.body.headers
, body: req.body.data
}).then(function (resp) {
if (resp.body instanceof Buffer || 'string' === typeof resp.body) {
resp.body = JSON.parse(resp.body);
}
return {
statusCode: resp.statusCode
, status: resp.status
, headers: resp.headers
, body: resp.body
, data: resp.data
};
}).then(function (result) {
res.send(result);
});
});
});
}
, loopback: function (req, res) {
if (handleCors(req, res, 'GET')) {
return;
}
isAuthorized(req, res, function () {
var prom;
var query = require('querystring').parse(require('url').parse(req.url).query);
if (query.provider) {
prom = deps.loopback(query.provider);
} else {
prom = deps.storage.owners.get(req.userId).then(function (session) {
return deps.loopback(session.token.aud);
});
}
res.setHeader('Content-Type', 'application/json');
prom.then(function (result) {
res.end(JSON.stringify(result));
}, function (err) {
res.end(JSON.stringify({error: {message: err.message, code: err.code}}));
});
});
}
, paywall_check: function (req, res) {
if (handleCors(req, res, 'GET')) {
return;
}
isAuthorized(req, res, function () {
res.setHeader('Content-Type', 'application/json;');
checkPaywall().then(function (paywall) {
res.end(JSON.stringify({paywall: paywall}));
}, function (err) {
err.message = err.message || err.toString();
res.statusCode = 500;
res.end(JSON.stringify({error: {message: err.message, code: err.code}}));
});
});
}
, socks5: function (req, res) {
if (handleCors(req, res, ['GET', 'POST', 'DELETE'])) {
return;
}
isAuthorized(req, res, function () {
var method = req.method.toUpperCase();
var prom;
if (method === 'POST') {
prom = deps.socks5.start();
} else if (method === 'DELETE') {
prom = deps.socks5.stop();
} else {
prom = deps.socks5.curState();
}
res.setHeader('Content-Type', 'application/json;');
prom.then(function (result) {
res.end(JSON.stringify(result));
}, function (err) {
err.message = err.message || err.toString();
res.statusCode = 500;
res.end(JSON.stringify({error: {message: err.message, code: err.code}}));
});
});
}
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};
};