Add non-standard codes and HTTP authentication middleware, and SHA256 utility function.
This commit is contained in:
parent
eb0d30f307
commit
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4 changed files with 750 additions and 1 deletions
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@ -184,7 +184,8 @@ let middleware = [
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require("./middleware/webRootPostfixes.js"),
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require("./middleware/rewriteURL.js"),
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require("./middleware/responseHeaders.js"),
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require("./middleware/checkForbiddenPaths.js")
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require("./middleware/checkForbiddenPaths.js"),
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require("./middleware/nonStandardCodesAndHttpAuthentication.js")
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];
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function addMiddleware(mw) {
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453
src/middleware/nonStandardCodesAndHttpAuthentication.js
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453
src/middleware/nonStandardCodesAndHttpAuthentication.js
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@ -0,0 +1,453 @@
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const os = require("os");
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const sha256 = require("../utils/sha256.js");
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const createRegex = require("../utils/createRegex.js");
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const ipMatch = require("../utils/ipMatch.js");
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const matchHostname = require("../utils/matchHostname.js");
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const cluster = require("../utils/clusterBunShim.js");
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// Brute force protection-related
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let bruteForceDb = {};
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// PBKDF2/scrypt cache
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let pbkdf2Cache = [];
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let scryptCache = [];
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let passwordHashCacheIntervalId = -1;
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if (!cluster.isPrimary) {
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passwordHashCacheIntervalId = setInterval(function () {
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pbkdf2Cache = pbkdf2Cache.filter(function (entry) {
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return entry.addDate > new Date() - 3600000;
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});
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scryptCache = scryptCache.filter(function (entry) {
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return entry.addDate > new Date() - 3600000;
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});
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}, 1800000);
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}
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module.exports = (req, res, logFacilities, config, next) => {
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let nonscodeIndex = -1;
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let authIndex = -1;
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let regexI = [];
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let hrefWithoutDuplicateSlashes = "";
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const reqip = req.socket.realRemoteAddress
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? req.socket.realRemoteAddress
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: req.socket.remoteAddress;
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// Scan for non-standard codes
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if (!req.isProxy && config.nonStandardCodes != undefined) {
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for (let i = 0; i < config.nonStandardCodes.length; i++) {
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if (
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matchHostname(config.nonStandardCodes[i].host, req.headers.host) &&
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ipMatch(
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config.nonStandardCodes[i].ip,
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req.socket ? req.socket.localAddress : undefined,
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)
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) {
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let isMatch = false;
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hrefWithoutDuplicateSlashes = req.parsedURL.pathname.replace(
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/\/+/g,
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"/",
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);
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if (config.nonStandardCodes[i].regex) {
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// Regex match
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var createdRegex = createRegex(
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config.nonStandardCodes[i].regex,
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true,
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);
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isMatch =
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req.url.match(createdRegex) ||
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hrefWithoutDuplicateSlashes.match(createdRegex);
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regexI[i] = createdRegex;
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} else {
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// Non-regex match
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isMatch =
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config.nonStandardCodes[i].url == hrefWithoutDuplicateSlashes ||
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(os.platform() == "win32" &&
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config.nonStandardCodes[i].url.toLowerCase() ==
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hrefWithoutDuplicateSlashes.toLowerCase());
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}
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if (isMatch) {
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if (config.nonStandardCodes[i].scode == 401) {
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// HTTP authentication
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if (authIndex == -1) {
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authIndex = i;
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}
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} else {
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if (nonscodeIndex == -1) {
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if (
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(config.nonStandardCodes[i].scode == 403 ||
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config.nonStandardCodes[i].scode == 451) &&
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config.nonStandardCodes[i].users !== undefined
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) {
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if (config.nonStandardCodes[i].users.check(reqip))
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nonscodeIndex = i;
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} else {
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nonscodeIndex = i;
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}
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}
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}
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}
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}
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}
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}
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// Handle non-standard codes
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if (nonscodeIndex > -1) {
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let nonscode = config.nonStandardCodes[nonscodeIndex];
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if (
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nonscode.scode == 301 ||
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nonscode.scode == 302 ||
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nonscode.scode == 307 ||
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nonscode.scode == 308
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) {
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let location = "";
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if (regexI[nonscodeIndex]) {
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location = req.url.replace(regexI[nonscodeIndex], nonscode.location);
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if (location == req.url) {
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// Fallback replacement
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location = hrefWithoutDuplicateSlashes.replace(
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regexI[nonscodeIndex],
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nonscode.location,
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);
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}
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} else if (
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req.url.split("?")[1] == undefined ||
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req.url.split("?")[1] == null ||
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req.url.split("?")[1] == "" ||
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req.url.split("?")[1] == " "
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) {
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location = nonscode.location;
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} else {
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location = nonscode.location + "?" + req.url.split("?")[1];
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}
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res.redirect(
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location,
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nonscode.scode == 302 || nonscode.scode == 307,
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nonscode.scode == 307 || nonscode.scode == 308,
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);
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return;
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} else {
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res.error(nonscode.scode);
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if (nonscode.scode == 403) {
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logFacilities.errmessage("Content blocked.");
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} else if (nonscode.scode == 410) {
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logFacilities.errmessage("Content is gone.");
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} else if (nonscode.scode == 418) {
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logFacilities.errmessage("SVR.JS is always a teapot ;)");
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} else {
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logFacilities.errmessage("Client fails receiving content.");
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}
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return;
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}
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}
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// Handle HTTP authentication
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if (authIndex > -1) {
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let authcode = config.nonStandardCodes[authIndex];
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// Function to check if passwords match
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const checkIfPasswordMatches = (list, password, callback, _i) => {
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if (!_i) _i = 0;
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const cb = function (hash) {
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if (hash == list[_i].pass) {
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callback(true);
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} else if (_i >= list.length - 1) {
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callback(false);
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} else {
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checkIfPasswordMatches(list, password, callback, _i + 1);
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}
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};
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let hashedPassword = sha256(password + list[_i].salt);
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let cacheEntry = null;
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if (list[_i].scrypt) {
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if (!crypto.scrypt) {
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res.error(
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500,
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new Error(
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"SVR.JS doesn't support scrypt-hashed passwords on Node.JS versions without scrypt hash support.",
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),
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);
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return;
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} else {
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cacheEntry = scryptCache.find(function (entry) {
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return (
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entry.password == hashedPassword && entry.salt == list[_i].salt
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);
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});
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if (cacheEntry) {
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cb(cacheEntry.hash);
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} else {
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crypto.scrypt(
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password,
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list[_i].salt,
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64,
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function (err, derivedKey) {
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if (err) {
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res.error(500, err);
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} else {
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const key = derivedKey.toString("hex");
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scryptCache.push({
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hash: key,
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password: hashedPassword,
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salt: list[_i].salt,
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addDate: new Date(),
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});
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cb(key);
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}
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},
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);
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}
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}
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} else if (list[_i].pbkdf2) {
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if (crypto.__disabled__ !== undefined) {
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res.error(
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500,
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new Error(
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"SVR.JS doesn't support PBKDF2-hashed passwords on Node.JS versions without crypto support.",
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),
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);
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return;
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} else {
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cacheEntry = pbkdf2Cache.find(function (entry) {
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return (
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entry.password == hashedPassword && entry.salt == list[_i].salt
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);
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});
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if (cacheEntry) {
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cb(cacheEntry.hash);
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} else {
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crypto.pbkdf2(
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password,
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list[_i].salt,
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36250,
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64,
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"sha512",
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function (err, derivedKey) {
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if (err) {
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res.error(500, err);
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} else {
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const key = derivedKey.toString("hex");
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pbkdf2Cache.push({
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hash: key,
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password: hashedPassword,
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salt: list[_i].salt,
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addDate: new Date(),
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});
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cb(key);
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}
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},
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);
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}
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}
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} else {
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cb(hashedPassword);
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}
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};
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const authorizedCallback = (bruteProtection) => {
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try {
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const ha = config.getCustomHeaders();
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ha["WWW-Authenticate"] =
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'Basic realm="' +
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(authcode.realm
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? authcode.realm.replace(/(\\|")/g, "\\$1")
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: "SVR.JS HTTP Basic Authorization") +
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'", charset="UTF-8"';
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const credentials = req.headers["authorization"];
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if (!credentials) {
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res.error(401, ha);
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logFacilities.errmessage("Content needs authorization.");
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return;
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}
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const credentialsMatch = credentials.match(/^Basic (.+)$/);
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if (!credentialsMatch) {
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res.error(401, ha);
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logFacilities.errmessage("Malformed credentials.");
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return;
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}
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const decodedCredentials = Buffer.from(
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credentialsMatch[1],
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"base64",
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).toString("utf8");
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const decodedCredentialsMatch =
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decodedCredentials.match(/^([^:]*):(.*)$/);
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if (!decodedCredentialsMatch) {
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res.error(401, ha);
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logFacilities.errmessage("Malformed credentials.");
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return;
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}
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const username = decodedCredentialsMatch[1];
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const password = decodedCredentialsMatch[2];
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let usernameMatch = [];
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let sha256Count = 0;
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let pbkdf2Count = 0;
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let scryptCount = 0;
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if (!authcode.userList || authcode.userList.indexOf(username) > -1) {
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usernameMatch = config.users.filter(function (entry) {
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if (entry.scrypt) {
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scryptCount++;
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} else if (entry.pbkdf2) {
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pbkdf2Count++;
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} else {
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sha256Count++;
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}
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return entry.name == username;
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});
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}
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if (usernameMatch.length == 0) {
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// Pushing false user match to prevent time-based user enumeration
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let fakeCredentials = {
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name: username,
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pass: "SVRJSAWebServerRunningOnNodeJS",
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salt: "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0",
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};
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if (!process.isBun) {
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if (scryptCount > sha256Count && scryptCount > pbkdf2Count) {
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fakeCredentials.scrypt = true;
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} else if (pbkdf2Count > sha256Count) {
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fakeCredentials.pbkdf2 = true;
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}
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}
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usernameMatch.push(fakeCredentials);
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}
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checkIfPasswordMatches(usernameMatch, password, function (authorized) {
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try {
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if (!authorized) {
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if (bruteProtection) {
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if (process.send) {
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process.send("\x12AUTHW" + reqip);
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} else {
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if (!bruteForceDb[reqip])
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bruteForceDb[reqip] = {
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invalidAttempts: 0,
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};
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bruteForceDb[reqip].invalidAttempts++;
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if (bruteForceDb[reqip].invalidAttempts >= 10) {
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bruteForceDb[reqip].lastAttemptDate = new Date();
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}
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}
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}
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res.error(401, ha);
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logFacilities.errmessage(
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'User "' +
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String(username).replace(/[\r\n]/g, "") +
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'" failed to log in.',
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);
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} else {
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if (bruteProtection) {
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if (process.send) {
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process.send("\x12AUTHR" + reqip);
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} else {
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if (bruteForceDb[reqip])
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bruteForceDb[reqip] = {
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invalidAttempts: 0,
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};
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}
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}
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logFacilities.reqmessage(
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'Client is logged in as "' +
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String(username).replace(/[\r\n]/g, "") +
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'".',
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);
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req.authUser = username;
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next();
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}
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} catch (err) {
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res.error(500, err);
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return;
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}
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});
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} catch (err) {
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res.error(500, err);
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return;
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}
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};
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if (authcode.disableBruteProtection) {
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// Don't brute-force protect it, just do HTTP authentication
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authorizedCallback(false);
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} else if (!process.send) {
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// Query data from JS object database
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if (
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!bruteForceDb[reqip] ||
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!bruteForceDb[reqip].lastAttemptDate ||
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new Date() - 300000 >= bruteForceDb[reqip].lastAttemptDate
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) {
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if (bruteForceDb[reqip] && bruteForceDb[reqip].invalidAttempts >= 10)
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bruteForceDb[reqip] = {
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invalidAttempts: 5,
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};
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authorizedCallback(true);
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} else {
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res.error(429);
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logFacilities.errmessage("Brute force limit reached!");
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}
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} else {
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var listenerEmitted = false;
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// Listen for brute-force protection response
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const authMessageListener = (message) => {
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if (listenerEmitted) return;
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if (message == "\x14AUTHA" + reqip || message == "\x14AUTHD" + reqip) {
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process.removeListener("message", authMessageListener);
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listenerEmitted = true;
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}
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if (message == "\x14AUTHD" + reqip) {
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res.error(429);
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logFacilities.errmessage("Brute force limit reached!");
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} else if (message == "\x14AUTHA" + reqip) {
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authorizedCallback(true);
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}
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};
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process.on("message", authMessageListener);
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process.send("\x12AUTHQ" + reqip);
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}
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} else {
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next();
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}
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};
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// IPC listener for brute force protection
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module.exports.mainMessageListenerWrapper = (worker) => {
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return function bruteForceListener(message) {
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let ip = "";
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if (message.substring(0, 6) == "\x12AUTHQ") {
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ip = message.substring(6);
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if (
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!bruteForceDb[ip] ||
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!bruteForceDb[ip].lastAttemptDate ||
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new Date() - 300000 >= bruteForceDb[ip].lastAttemptDate
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) {
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if (bruteForceDb[ip] && bruteForceDb[ip].invalidAttempts >= 10)
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bruteForceDb[ip] = {
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invalidAttempts: 5,
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};
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worker.send("\x14AUTHA" + ip);
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} else {
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worker.send("\x14AUTHD" + ip);
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}
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} else if (message.substring(0, 6) == "\x12AUTHR") {
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ip = message.substring(6);
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if (bruteForceDb[ip])
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bruteForceDb[ip] = {
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invalidAttempts: 0,
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};
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} else if (message.substring(0, 6) == "\x12AUTHW") {
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ip = message.substring(6);
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if (!bruteForceDb[ip])
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bruteForceDb[ip] = {
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invalidAttempts: 0,
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};
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bruteForceDb[ip].invalidAttempts++;
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if (bruteForceDb[ip].invalidAttempts >= 10) {
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bruteForceDb[ip].lastAttemptDate = new Date();
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}
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}
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};
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};
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module.exports.commands = {
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stop: (args, passCommand) => {
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clearInterval(passwordHashCacheIntervalId);
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passCommand(args);
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},
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};
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236
src/utils/sha256.js
Normal file
236
src/utils/sha256.js
Normal file
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@ -0,0 +1,236 @@
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let crypto = { __disabled__: null };
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try {
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crypto = require("crypto");
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} catch (err) {
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// Crypto support is disabled.
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}
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// SHA256 function
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function sha256(s) {
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if (crypto.__disabled__ === undefined) {
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let hash = crypto.createHash("SHA256");
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hash.update(s);
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return hash.digest("hex");
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} else {
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const chrsz = 8;
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const hexcase = 0;
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const safeAdd = (x, y) => {
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const lsw = (x & 0xffff) + (y & 0xffff);
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const msw = (x >> 16) + (y >> 16) + (lsw >> 16);
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return (msw << 16) | (lsw & 0xffff);
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};
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const S = (X, n) => {
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return (X >>> n) | (X << (32 - n));
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};
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const R = (X, n) => {
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return X >>> n;
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};
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const Ch = (x, y, z) => {
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return (x & y) ^ (~x & z);
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};
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||||
|
||||
const Maj = (x, y, z) => {
|
||||
return (x & y) ^ (x & z) ^ (y & z);
|
||||
};
|
||||
|
||||
const Sigma0256 = (x) => {
|
||||
return S(x, 2) ^ S(x, 13) ^ S(x, 22);
|
||||
};
|
||||
|
||||
const Sigma1256 = (x) => {
|
||||
return S(x, 6) ^ S(x, 11) ^ S(x, 25);
|
||||
};
|
||||
|
||||
const Gamma0256 = (x) => {
|
||||
return S(x, 7) ^ S(x, 18) ^ R(x, 3);
|
||||
};
|
||||
|
||||
const Gamma1256 = (x) => {
|
||||
return S(x, 17) ^ S(x, 19) ^ R(x, 10);
|
||||
};
|
||||
|
||||
function coreSha256(m, l) {
|
||||
const K = new Array(
|
||||
0x428a2f98,
|
||||
0x71374491,
|
||||
0xb5c0fbcf,
|
||||
0xe9b5dba5,
|
||||
0x3956c25b,
|
||||
0x59f111f1,
|
||||
0x923f82a4,
|
||||
0xab1c5ed5,
|
||||
0xd807aa98,
|
||||
0x12835b01,
|
||||
0x243185be,
|
||||
0x550c7dc3,
|
||||
0x72be5d74,
|
||||
0x80deb1fe,
|
||||
0x9bdc06a7,
|
||||
0xc19bf174,
|
||||
0xe49b69c1,
|
||||
0xefbe4786,
|
||||
0xfc19dc6,
|
||||
0x240ca1cc,
|
||||
0x2de92c6f,
|
||||
0x4a7484aa,
|
||||
0x5cb0a9dc,
|
||||
0x76f988da,
|
||||
0x983e5152,
|
||||
0xa831c66d,
|
||||
0xb00327c8,
|
||||
0xbf597fc7,
|
||||
0xc6e00bf3,
|
||||
0xd5a79147,
|
||||
0x6ca6351,
|
||||
0x14292967,
|
||||
0x27b70a85,
|
||||
0x2e1b2138,
|
||||
0x4d2c6dfc,
|
||||
0x53380d13,
|
||||
0x650a7354,
|
||||
0x766a0abb,
|
||||
0x81c2c92e,
|
||||
0x92722c85,
|
||||
0xa2bfe8a1,
|
||||
0xa81a664b,
|
||||
0xc24b8b70,
|
||||
0xc76c51a3,
|
||||
0xd192e819,
|
||||
0xd6990624,
|
||||
0xf40e3585,
|
||||
0x106aa070,
|
||||
0x19a4c116,
|
||||
0x1e376c08,
|
||||
0x2748774c,
|
||||
0x34b0bcb5,
|
||||
0x391c0cb3,
|
||||
0x4ed8aa4a,
|
||||
0x5b9cca4f,
|
||||
0x682e6ff3,
|
||||
0x748f82ee,
|
||||
0x78a5636f,
|
||||
0x84c87814,
|
||||
0x8cc70208,
|
||||
0x90befffa,
|
||||
0xa4506ceb,
|
||||
0xbef9a3f7,
|
||||
0xc67178f2,
|
||||
);
|
||||
let HASH = new Array(
|
||||
0x6a09e667,
|
||||
0xbb67ae85,
|
||||
0x3c6ef372,
|
||||
0xa54ff53a,
|
||||
0x510e527f,
|
||||
0x9b05688c,
|
||||
0x1f83d9ab,
|
||||
0x5be0cd19,
|
||||
);
|
||||
let W = new Array(64);
|
||||
let a, b, c, d, e, f, g, h, i, j;
|
||||
let T1, T2;
|
||||
|
||||
m[l >> 5] |= 0x80 << (24 - (l % 32));
|
||||
m[(((l + 64) >> 9) << 4) + 15] = l;
|
||||
|
||||
for (let i = 0; i < m.length; i += 16) {
|
||||
a = HASH[0];
|
||||
b = HASH[1];
|
||||
c = HASH[2];
|
||||
d = HASH[3];
|
||||
e = HASH[4];
|
||||
f = HASH[5];
|
||||
g = HASH[6];
|
||||
h = HASH[7];
|
||||
|
||||
for (let j = 0; j < 64; j++) {
|
||||
if (j < 16) W[j] = m[j + i];
|
||||
else
|
||||
W[j] = safeAdd(
|
||||
safeAdd(
|
||||
safeAdd(Gamma1256(W[j - 2]), W[j - 7]),
|
||||
Gamma0256(W[j - 15]),
|
||||
),
|
||||
W[j - 16],
|
||||
);
|
||||
|
||||
T1 = safeAdd(
|
||||
safeAdd(safeAdd(safeAdd(h, Sigma1256(e)), Ch(e, f, g)), K[j]),
|
||||
W[j],
|
||||
);
|
||||
T2 = safeAdd(Sigma0256(a), Maj(a, b, c));
|
||||
|
||||
h = g;
|
||||
g = f;
|
||||
f = e;
|
||||
e = safeAdd(d, T1);
|
||||
d = c;
|
||||
c = b;
|
||||
b = a;
|
||||
a = safeAdd(T1, T2);
|
||||
}
|
||||
|
||||
HASH[0] = safeAdd(a, HASH[0]);
|
||||
HASH[1] = safeAdd(b, HASH[1]);
|
||||
HASH[2] = safeAdd(c, HASH[2]);
|
||||
HASH[3] = safeAdd(d, HASH[3]);
|
||||
HASH[4] = safeAdd(e, HASH[4]);
|
||||
HASH[5] = safeAdd(f, HASH[5]);
|
||||
HASH[6] = safeAdd(g, HASH[6]);
|
||||
HASH[7] = safeAdd(h, HASH[7]);
|
||||
}
|
||||
return HASH;
|
||||
}
|
||||
|
||||
const str2binb = (str) => {
|
||||
let bin = Array();
|
||||
const mask = (1 << chrsz) - 1;
|
||||
for (let i = 0; i < str.length * chrsz; i += chrsz) {
|
||||
bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - (i % 32));
|
||||
}
|
||||
return bin;
|
||||
};
|
||||
|
||||
const Utf8Encode = (string) => {
|
||||
string = string.replace(/\r\n/g, "\n");
|
||||
let utftext = "";
|
||||
|
||||
for (let n = 0; n < string.length; n++) {
|
||||
let c = string.charCodeAt(n);
|
||||
|
||||
if (c < 128) {
|
||||
utftext += String.fromCharCode(c);
|
||||
} else if (c > 127 && c < 2048) {
|
||||
utftext += String.fromCharCode((c >> 6) | 192);
|
||||
utftext += String.fromCharCode((c & 63) | 128);
|
||||
} else {
|
||||
utftext += String.fromCharCode((c >> 12) | 224);
|
||||
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
|
||||
utftext += String.fromCharCode((c & 63) | 128);
|
||||
}
|
||||
}
|
||||
|
||||
return utftext;
|
||||
};
|
||||
|
||||
const binb2hex = (binarray) => {
|
||||
const hexTab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
|
||||
let str = "";
|
||||
for (let i = 0; i < binarray.length * 4; i++) {
|
||||
str +=
|
||||
hexTab.charAt((binarray[i >> 2] >> ((3 - (i % 4)) * 8 + 4)) & 0xf) +
|
||||
hexTab.charAt((binarray[i >> 2] >> ((3 - (i % 4)) * 8)) & 0xf);
|
||||
}
|
||||
return str;
|
||||
};
|
||||
|
||||
s = Utf8Encode(s);
|
||||
return binb2hex(coreSha256(str2binb(s), s.length * chrsz));
|
||||
}
|
||||
}
|
||||
|
||||
module.exports = sha256;
|
||||
59
tests/utils/sha256.test.js
Normal file
59
tests/utils/sha256.test.js
Normal file
|
|
@ -0,0 +1,59 @@
|
|||
const sha256 = require("../../src/utils/sha256");
|
||||
const crypto = require("crypto");
|
||||
|
||||
// Mock the crypto module to simulate the absence of crypto support
|
||||
jest.mock("crypto", () => ({
|
||||
createHash: jest.fn(() => ({
|
||||
update: jest.fn(),
|
||||
digest: jest.fn(() => "mockedHash"),
|
||||
})),
|
||||
}));
|
||||
|
||||
describe("SHA256 hash", () => {
|
||||
test("should use crypto module if available", () => {
|
||||
const result = sha256("test");
|
||||
expect(result).toBe("mockedHash");
|
||||
expect(crypto.createHash).toHaveBeenCalledWith("SHA256");
|
||||
});
|
||||
|
||||
test("should fallback to manual SHA256 implementation if crypto is disabled", () => {
|
||||
crypto.__disabled__ = null;
|
||||
const result = sha256("test");
|
||||
expect(result).toBe(
|
||||
"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
|
||||
);
|
||||
});
|
||||
|
||||
test("should handle empty string", () => {
|
||||
crypto.__disabled__ = null;
|
||||
const result = sha256("");
|
||||
expect(result).toBe(
|
||||
"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
|
||||
);
|
||||
});
|
||||
|
||||
test("should handle special characters", () => {
|
||||
crypto.__disabled__ = null;
|
||||
const result = sha256("!@#$%^&*()");
|
||||
expect(result).toBe(
|
||||
"95ce789c5c9d18490972709838ca3a9719094bca3ac16332cfec0652b0236141",
|
||||
);
|
||||
});
|
||||
|
||||
test("should handle long strings", () => {
|
||||
crypto.__disabled__ = null;
|
||||
const longString = "a".repeat(1000);
|
||||
const result = sha256(longString);
|
||||
expect(result).toBe(
|
||||
"41edece42d63e8d9bf515a9ba6932e1c20cbc9f5a5d134645adb5db1b9737ea3",
|
||||
);
|
||||
});
|
||||
|
||||
test("should handle non-ASCII characters", () => {
|
||||
crypto.__disabled__ = null;
|
||||
const result = sha256("éñ");
|
||||
expect(result).toBe(
|
||||
"c53435f74d8215688e74112f1c6527ad31fd3b72939769a75d09a14cd8a80cfe",
|
||||
);
|
||||
});
|
||||
});
|
||||
Loading…
Reference in a new issue