199 lines
7.6 KiB
JavaScript
Executable File
199 lines
7.6 KiB
JavaScript
Executable File
const fs = require("fs-extra");
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const dayjs = require("dayjs");
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const glob = require("glob");
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// To debug it could be easier with source code:
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// const openpgp = require("/media/phil/usbfarm/apxtrib/node_modules/openpgp/dist/node/openpgp.js");
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const openpgp = require("openpgp");
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/**
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* Check authentification and get person profils for a tribe
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* @param {object} req
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* @param {object} res
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* @param {function} next
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* @returns {status:}
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*
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* 3 steps:
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* - clean eventual tokens oldest than 24 hours (the first pagan that authenticate of the day will process this)
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* - if token present in /town/tmp/tokens/alias_tribe_part of the xhash return xprofils with list of profils pagans
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* - if no token then check xhash with openpgp lib and create one
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*
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* All data related are store in town/tmp/tokens backend, and localstorage headers for front end
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* A penalty function increase a sleep function between 2 fail try of authentification to avoid bruteforce
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*/
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const isAuthenticated = async (req, res, next) => {
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// tokens if valid are store in /dirtown/tmp/tokens/xalias_xdays_xhash(20,200)
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// once a day rm oldest tokens than 24hours tag job by adding tmp/tokensmenagedone{day}
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const withlog = true;
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const currentday = dayjs().date();
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fs.ensureDirSync(`${process.env.dirtown}/tmp/tokens`);
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let menagedone = fs.existsSync(
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`${process.env.dirtown}/tmp/tokens/menagedone${currentday}`
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);
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if (withlog)
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console.log(`menagedone${currentday} was it done today?:${menagedone}`);
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if (!menagedone) {
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// clean oldest
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const tsday = dayjs().valueOf(); // now in timestamp format
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glob.sync(`${process.env.dirtown}/tmp/tokens/menagedone*`).forEach((f) => {
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fs.removeSync(f);
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});
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glob.sync(`${process.env.dirtown}/tmp/tokens/*.json`).forEach((f) => {
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const fsplit = f.split("_");
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const elapse = tsday - parseInt(fsplit[2]);
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//24h 86400000 milliseconde 15mn 900000
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if (elapse && elapse > 86400000) {
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fs.remove(f);
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}
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});
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fs.outputFile(
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`${process.env.dirtown}/tmp/tokens/menagedone${currentday}`,
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"done by middleware/isAUthenticated"
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);
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}
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//Check register in tmp/tokens/
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if (withlog) console.log("isAuthenticate?", req.session.header, req.body);
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const resnotauth = {
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ref: "middlewares",
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msg: "notauthenticated",
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data: {
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xalias: req.session.header.xalias,
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xaliasexists: true,
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},
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};
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if (
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req.session.header.xalias == "anonymous" ||
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req.session.header.xhash == "anonymous"
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) {
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if (withlog) console.log("alias anonymous means not auth");
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resnotauth.status = 401;
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return res.status(resnotauth.status).json(resnotauth);
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}
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let tmpfs = `${process.env.dirtown}/tmp/tokens/${req.session.header.xalias}_${req.session.header.xtribe}_${req.session.header.xdays}`;
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//max filename in ext4: 255 characters
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tmpfs += `_${req.session.header.xhash.substring(
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150,
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150 + tmpfs.length - 249
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)}.json`;
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/**
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*
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* @param {string} alias that request an access
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* @param {string} action "clean" | "penalty"
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*/
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const bruteforcepenalty = async (alias, action) => {
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const sleep = (ms) => {
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return new Promise((resolve) => setTimeout(resolve, ms));
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};
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const failstamp = `${process.env.dirtown}/tmp/tokens/${alias}.json`;
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if (action == "clean") {
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//to reinit bruteforce checker
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if (withlog) console.log("try to clean penalty file ", failstamp);
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fs.remove(failstamp, (err) => {
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if (err) console.log("Check forcebrut ", err);
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});
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} else if (action == "penalty") {
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const stamp = fs.existsSync(failstamp)
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? fs.readJSONSync(failstamp)
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: { lastfail: dayjs().format(), numberfail: 0 };
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stamp.lastfail = dayjs().format();
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stamp.numberfail += 1;
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fs.outputJSON(failstamp, stamp);
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if (withlog) console.log("penalty:", stamp);
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await sleep(stamp.numberfail * 100); //increase of 0,1 second the answer time per fail
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if (withlog) console.log("time out penalty");
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}
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};
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if (!fs.existsSync(tmpfs)) {
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// need to check detached sign
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let publickey = "";
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console.log(process.cwd());
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console.log(process.env.PWD);
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console.log(__dirname);
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const aliasinfo = `${process.env.PWD}/nationchains/pagans/itm/${req.session.header.xalias}.json`;
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if (fs.existsSync(aliasinfo)) {
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publickey = fs.readJsonSync(aliasinfo).publickey;
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} else if (req.body.publickey) {
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resnotauth.data.xaliasexists = false;
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publickey = req.body.publickey;
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}
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if (publickey == "") {
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if (withlog) console.log("alias unknown");
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resnotauth.status = 404;
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resnotauth.data.xaliasexists = false;
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return res.status(resnotauth.status).send(resnotauth);
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}
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if (withlog) console.log("publickey", publickey);
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if (publickey.substring(0, 31) !== "-----BEGIN PGP PUBLIC KEY BLOCK") {
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if (withlog)
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console.log("Publickey is not valid as armored key:", publickey);
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await bruteforcepenalty(req.session.header.xalias, "penalty");
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resnotauth.status = 404;
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return res.status(resnotauth.status).send(resnotauth);
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}
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const clearmsg = Buffer.from(req.session.header.xhash, "base64").toString();
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if (clearmsg.substring(0, 10) !== "-----BEGIN") {
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if (withlog)
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console.log("xhash conv is not valid as armored key:", clearmsg);
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await bruteforcepenalty(req.session.header.xalias, "penalty");
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resnotauth.status = 404;
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return res.status(resnotauth.status).send(resnotauth);
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}
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if (withlog) console.log("clearmsg", clearmsg);
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const pubkey = await openpgp.readKey({ armoredKey: publickey });
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const signedMessage = await openpgp.readCleartextMessage({
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cleartextMessage: clearmsg,
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});
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const verificationResult = await openpgp.verify({
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message: signedMessage,
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verificationKeys: pubkey,
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});
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if (withlog) console.log(verificationResult);
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if (withlog) console.log(verificationResult.signatures[0].keyID.toHex());
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try {
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await verificationResult.signatures[0].verified;
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if (
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verificationResult.data !=
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`${req.session.header.xalias}_${req.session.header.xdays}`
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) {
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resnotauth.msg = "signaturefailled";
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if (withlog)
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console.log(
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`message recu:${verificationResult.data} , message attendu:${req.session.header.xalias}_${req.session.header.xdays}`
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);
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await bruteforcepenalty(req.session.header.xalias, "penalty");
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resnotauth.status = 401;
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return res.status(resnotauth.status).send(resnotauth);
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}
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} catch (e) {
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resnotauth.msg = "signaturefailled";
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if (withlog) console.log("erreur", e);
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await bruteforcepenalty(req.session.header.xalias, "penalty");
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resnotauth.status = 401;
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return res.status(resnotauth.status).send(resnotauth);
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}
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// authenticated then get person profils (person = pagan for a xtrib)
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req.session.header.xprofils.push("pagans");
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const person = `${process.env.dirtown}/tribes/${req.session.header.xtribe}/persons/itm/${req.session.header.xalias}.json`;
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if (withlog) {
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console.log("Profils tribe/app management");
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console.log("person", person);
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}
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if (fs.existsSync(person)) {
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const infoperson = fs.readJSONSync(person);
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console.log(infoperson);
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infoperson.profils.forEach((p) => req.session.header.xprofils.push(p));
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}
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fs.outputJSONSync(tmpfs, req.session.header.xprofils);
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} else {
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//tmpfs exist get profils from identification process
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req.session.header.xprofils = fs.readJSONSync(tmpfs);
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}
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bruteforcepenalty(req.session.header.xalias, "clean");
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console.log(`${req.session.header.xalias} Authenticated`);
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next();
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};
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module.exports = isAuthenticated;
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