forked from apxtri/apxtri
208 lines
8.5 KiB
JavaScript
Executable File
208 lines
8.5 KiB
JavaScript
Executable File
const fs = require("fs-extra");
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const dayjs = require("dayjs");
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//const path=require('path');
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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/apxtri/node_modules/openpgp/dist/node/openpgp.js");
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const openpgp = require("openpgp");
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const conf = require(`../../../conf.json`);
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const currentmod='isAuthenticated';
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const log = conf.api.activelog.includes(currentmod)
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/**
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* @api {get} / - isAuthenticated
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* @apiGroup Middlewares
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* @apiName isAuthenticated
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* @apiDescription - valid if exist xalias_xdays_xhash.substr(20,200) in town/tmp/tokens/
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* - if not,
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* - valid if xhash signature sign xalias_xdays with alias's publickey.
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* - if not valid => not allowed
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* - If valid =>
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* - store a xalias_xdays_xhash.substr (20,200) into /tmp/tokens with xprofils array from person.
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* - update header.xprofils from this token
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*
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* apxtri profils are anonymous, pagans, mayor (on a node server), druid (on a tribe like smatchit).
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*
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* pagan identity is independant of domain (tribe), by default profils are :['anonymous','pagans']. if this alias exist in a tribe domain as a person then his profils come from /tribes/{tribeId}/objects/person/itm/{alias}.json profils:['anonymous','pagans','person','seeker'] any profils allowed to act on tribe objects.
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*
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* Each profil have CRUD accessright on object managed in schema in apxaccessrights:{owner,profil:{"C":[],"R":[properties],"U":[properties],"D":[]}}, see Odmdb for details.
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*
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* A process run once each day to clean up all xhash tmp/tokens oldest than 24 hours.
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*
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**/
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const isAuthenticated = async (req, res, next) => {
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/*
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console.log(__dirname)
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console.log(path.resolve('../tmp/tokens'))
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if (fs.existsSync('../tmp/tokens')) console.log('pass A')
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if (fs.existsSync('../tmp/tokens')) console.log('pass B')
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*/
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const currentday = dayjs().date();
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fs.ensureDirSync(`../tmp/tokens`);
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let menagedone = fs.existsSync(
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`../../tmp/tokens/menagedone${currentday}`
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);
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if (menagedone) console.log(Date.now(),`menagedone${currentday} was it done today?:${menagedone}`);
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if (!menagedone) {
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// clean oldest
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const tsday = dayjs().valueOf(); // now in timestamp format
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glob.sync(`../../tmp/tokens/menagedone*`).forEach((f) => {
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fs.removeSync(f);
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});
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glob.sync(`../../tmp/tokens/*.json`).forEach((f) => {
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const fsplit = f.split("_");
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const elapse = tsday - parseInt(fsplit[2]);
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//24h 86400000 milliseconde 15mn 900000
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if (elapse && elapse > 86400000) {
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fs.remove(f);
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}
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});
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//clean tmp
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glob.sync(`../../tmp/*.txt`).forEach((f) => {
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fs.remove(f);
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});
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fs.outputFile(
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`../../tmp/tokens/menagedone${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 (log) console.log( currentmod," 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 (log) console.log(currentmod,"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 = `../../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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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 = `../../tmp/tokens/${alias}.json`;
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if (action == "clean") {
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//to reinit bruteforce checker
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if (log) console.log(currentmod, "try to clean penalty file ", failstamp);
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fs.remove(failstamp, (err) => {
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if (err) console.log(Date.now(),currentmod,"Check forcebrut ", err);
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});
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} else if (action == "penalty") {
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const stamp = fs.existsSync(failstamp)
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? fs.readJSONSync(failstamp)
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: { lastfail: dayjs().format(), numberfail: 0 };
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stamp.lastfail = dayjs().format();
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stamp.numberfail += 1;
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fs.outputJSON(failstamp, stamp);
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if (log) console.log(currentmod,"penalty:", stamp);
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await sleep(stamp.numberfail * 100); //increase of 0,1 second the answer time per fail
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if (log) console.log(currentmod,"time out penalty");
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}
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};
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if (!fs.existsSync(tmpfs)) {
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// need to check detached sign
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let publickey = "";
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const aliasinfo = `../objects/pagans/itm/${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 (log) console.log(currentmod,"header xalias unknown:",req.session.header.xalias);
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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 (log) console.log(currentmod,"publickey", publickey);
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if (publickey.substring(0, 31) !== "-----BEGIN PGP PUBLIC KEY BLOCK") {
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console.log(Date.now(),currentmod,"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 (log) console.log(currentmod,"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 (log) console.log(currentmod, "clearmsg", clearmsg);
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let signedMessage=""
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const pubkey = await openpgp.readKey({ armoredKey: publickey });
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try{
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signedMessage = await openpgp.readCleartextMessage({
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cleartextMessage: clearmsg,
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});
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}catch(err){
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return res.status(422).send({status:422,ref:"Middleware",msg:"unconsistentcleartextmessage",data:{xhash:req.session.header.xhash,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 (log) console.log(currentmod,verificationResult);
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if (log) console.log(currentmod,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 (log) console.log(currentmod,`message recu:${verificationResult.data} , message attendu:${req.session.header.xalias}_${req.session.header.xdays}`
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);
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await bruteforcepenalty(req.session.header.xalias, "penalty");
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resnotauth.status = 401;
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return res.status(resnotauth.status).send(resnotauth);
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}
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} catch (e) {
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resnotauth.msg = "signaturefailled";
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if (log) console.log(currentmod,"erreur", e);
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await bruteforcepenalty(req.session.header.xalias, "penalty");
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resnotauth.status = 401;
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return res.status(resnotauth.status).send(resnotauth);
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}
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// authenticated then get person profils (person = pagan for a xtrib)
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const person = `../../${req.session.header.xtribe}/objects/persons/itm/${req.session.header.xalias}.json`;
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if (log) console.log(currentmod,"Profils tribe/app management");
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if (log) console.log(currentmod,"person", person);
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if (fs.existsSync(person)) {
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const infoperson = fs.readJSONSync(person);
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if (log) console.log(currentmod,"infoperson",infoperson);
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infoperson.profils.forEach((p) => {
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if (!req.session.header.xprofils.includes(p)) req.session.header.xprofils.push(p);
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})
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}else{
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if (!req.session.header.xprofils.includes('pagans')) req.session.header.xprofils.push("pagans");
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}
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fs.outputJSONSync(tmpfs, req.session.header.xprofils);
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} else {
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//tmpfs exist get profils from identification process
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req.session.header.xprofils = fs.readJSONSync(tmpfs);
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}
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bruteforcepenalty(req.session.header.xalias, "clean");
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if (log) console.log(currentmod,`${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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