mirror of
https://github.com/verdaccio/verdaccio.git
synced 2024-12-23 22:27:34 -05:00
379 lines
9.8 KiB
JavaScript
379 lines
9.8 KiB
JavaScript
var Crypto = require('crypto')
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var jju = require('jju')
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var Error = require('http-errors')
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var Logger = require('./logger')
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var load_plugins = require('./plugin-loader').load_plugins
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module.exports = Auth
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function Auth(config) {
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var self = Object.create(Auth.prototype)
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self.config = config
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self.logger = Logger.logger.child({ sub: 'auth' })
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self.secret = config.secret
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var plugin_params = {
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config: config,
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logger: self.logger
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}
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if (config.users_file) {
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if (!config.auth || !config.auth.htpasswd) {
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// b/w compat
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config.auth = config.auth || {}
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config.auth.htpasswd = { file: config.users_file }
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}
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}
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self.plugins = load_plugins(config, config.auth, plugin_params, function (p) {
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return p.authenticate || p.allow_access || p.allow_publish
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})
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self.plugins.unshift({
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verdaccio_version: '1.1.0',
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authenticate: function(user, password, cb) {
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if (config.users != null
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&& config.users[user] != null
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&& (Crypto.createHash('sha1').update(password).digest('hex')
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=== config.users[user].password)
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) {
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return cb(null, [ user ])
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}
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return cb()
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},
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adduser: function(user, password, cb) {
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if (config.users && config.users[user])
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return cb( Error[403]('this user already exists') )
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return cb()
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},
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})
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function allow_action(action) {
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return function(user, package, cb) {
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var ok = package[action].reduce(function(prev, curr) {
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if (user.groups.indexOf(curr) !== -1) return true
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return prev
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}, false)
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if (ok) return cb(null, true)
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if (user.name) {
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cb( Error[403]('user ' + user.name + ' is not allowed to ' + action + ' package ' + package.name) )
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} else {
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cb( Error[403]('unregistered users are not allowed to ' + action + ' package ' + package.name) )
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}
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}
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}
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self.plugins.push({
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authenticate: function(user, password, cb) {
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return cb( Error[403]('bad username/password, access denied') )
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},
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add_user: function(user, password, cb) {
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return cb( Error[409]('registration is disabled') )
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},
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allow_access: allow_action('access'),
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allow_publish: allow_action('publish'),
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})
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return self
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}
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Auth.prototype.authenticate = function(user, password, cb) {
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var plugins = this.plugins.slice(0)
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;(function next() {
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var p = plugins.shift()
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if (typeof(p.authenticate) !== 'function') {
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return next()
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}
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p.authenticate(user, password, function(err, groups) {
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if (err) return cb(err)
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if (groups != null && groups != false)
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return cb(err, AuthenticatedUser(user, groups))
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next()
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})
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})()
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}
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Auth.prototype.add_user = function(user, password, cb) {
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var self = this
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var plugins = this.plugins.slice(0)
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;(function next() {
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var p = plugins.shift()
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var n = 'adduser'
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if (typeof(p[n]) !== 'function') {
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n = 'add_user'
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}
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if (typeof(p[n]) !== 'function') {
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next()
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} else {
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p[n](user, password, function(err, ok) {
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if (err) return cb(err)
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if (ok) return self.authenticate(user, password, cb)
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next()
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})
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}
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})()
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}
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Auth.prototype.allow_access = function(package_name, user, callback) {
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var plugins = this.plugins.slice(0)
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var package = Object.assign({ name: package_name },
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this.config.get_package_spec(package_name))
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;(function next() {
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var p = plugins.shift()
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if (typeof(p.allow_access) !== 'function') {
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return next()
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}
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p.allow_access(user, package, function(err, ok) {
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if (err) return callback(err)
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if (ok) return callback(null, ok)
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next() // cb(null, false) causes next plugin to roll
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})
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})()
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}
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Auth.prototype.allow_publish = function(package_name, user, callback) {
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var plugins = this.plugins.slice(0)
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var package = Object.assign({ name: package_name },
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this.config.get_package_spec(package_name))
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;(function next() {
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var p = plugins.shift()
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if (typeof(p.allow_publish) !== 'function') {
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return next()
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}
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p.allow_publish(user, package, function(err, ok) {
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if (err) return callback(err)
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if (ok) return callback(null, ok)
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next() // cb(null, false) causes next plugin to roll
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})
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})()
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}
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Auth.prototype.basic_middleware = function() {
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var self = this
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return function(req, res, _next) {
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req.pause()
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function next(err) {
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req.resume()
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// uncomment this to reject users with bad auth headers
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//return _next.apply(null, arguments)
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// swallow error, user remains unauthorized
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// set remoteUserError to indicate that user was attempting authentication
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if (err) req.remote_user.error = err.message
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return _next()
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}
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if (req.remote_user != null && req.remote_user.name !== undefined)
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return next()
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req.remote_user = AnonymousUser()
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var authorization = req.headers.authorization
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if (authorization == null) return next()
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var parts = authorization.split(' ')
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if (parts.length !== 2)
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return next( Error[400]('bad authorization header') )
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var scheme = parts[0]
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if (scheme === 'Basic') {
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var credentials = new Buffer(parts[1], 'base64').toString()
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} else if (scheme === 'Bearer') {
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var credentials = self.aes_decrypt(new Buffer(parts[1], 'base64')).toString('utf8')
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if (!credentials) return next()
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} else {
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return next()
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}
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var index = credentials.indexOf(':')
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if (index < 0) return next()
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var user = credentials.slice(0, index)
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var pass = credentials.slice(index + 1)
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self.authenticate(user, pass, function(err, user) {
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if (!err) {
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req.remote_user = user
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next()
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} else {
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req.remote_user = AnonymousUser()
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next(err)
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}
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})
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}
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}
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Auth.prototype.bearer_middleware = function() {
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var self = this
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return function(req, res, _next) {
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req.pause()
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function next(_err) {
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req.resume()
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return _next.apply(null, arguments)
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}
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if (req.remote_user != null && req.remote_user.name !== undefined)
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return next()
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req.remote_user = AnonymousUser()
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var authorization = req.headers.authorization
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if (authorization == null) return next()
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var parts = authorization.split(' ')
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if (parts.length !== 2)
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return next( Error[400]('bad authorization header') )
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var scheme = parts[0]
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var token = parts[1]
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if (scheme !== 'Bearer')
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return next()
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try {
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var user = self.decode_token(token)
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} catch(err) {
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return next(err)
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}
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req.remote_user = AuthenticatedUser(user.u, user.g)
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req.remote_user.token = token
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next()
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}
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}
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Auth.prototype.cookie_middleware = function() {
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var self = this
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return function(req, res, _next) {
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req.pause()
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function next(_err) {
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req.resume()
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return _next()
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}
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if (req.remote_user != null && req.remote_user.name !== undefined)
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return next()
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req.remote_user = AnonymousUser()
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var token = req.cookies.get('token')
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if (token == null) return next()
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/*try {
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var user = self.decode_token(token, 60*60)
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} catch(err) {
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return next()
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}
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req.remote_user = AuthenticatedUser(user.u, user.g)
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req.remote_user.token = token
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next()*/
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var credentials = self.aes_decrypt(new Buffer(token, 'base64')).toString('utf8')
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if (!credentials) return next()
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var index = credentials.indexOf(':')
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if (index < 0) return next()
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var user = credentials.slice(0, index)
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var pass = credentials.slice(index + 1)
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self.authenticate(user, pass, function(err, user) {
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if (!err) {
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req.remote_user = user
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next()
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} else {
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req.remote_user = AnonymousUser()
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next(err)
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}
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})
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}
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}
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Auth.prototype.issue_token = function(user) {
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var data = jju.stringify({
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u: user.name,
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g: user.real_groups && user.real_groups.length ? user.real_groups : undefined,
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t: ~~(Date.now()/1000),
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}, { indent: false })
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data = new Buffer(data, 'utf8')
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var mac = Crypto.createHmac('sha256', this.secret).update(data).digest()
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return Buffer.concat([ data, mac ]).toString('base64')
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}
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Auth.prototype.decode_token = function(str, expire_time) {
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var buf = new Buffer(str, 'base64')
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if (buf.length <= 32) throw Error[401]('invalid token')
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var data = buf.slice(0, buf.length - 32)
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var their_mac = buf.slice(buf.length - 32)
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var good_mac = Crypto.createHmac('sha256', this.secret).update(data).digest()
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their_mac = Crypto.createHash('sha512').update(their_mac).digest('hex')
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good_mac = Crypto.createHash('sha512').update(good_mac).digest('hex')
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if (their_mac !== good_mac) throw Error[401]('bad signature')
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// make token expire in 24 hours
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// TODO: make configurable?
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expire_time = expire_time || 24*60*60
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data = jju.parse(data.toString('utf8'))
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if (Math.abs(data.t - ~~(Date.now()/1000)) > expire_time)
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throw Error[401]('token expired')
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return data
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}
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Auth.prototype.aes_encrypt = function(buf) {
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var c = Crypto.createCipher('aes192', this.secret)
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var b1 = c.update(buf)
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var b2 = c.final()
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return Buffer.concat([ b1, b2 ])
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}
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Auth.prototype.aes_decrypt = function(buf) {
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try {
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var c = Crypto.createDecipher('aes192', this.secret)
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var b1 = c.update(buf)
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var b2 = c.final()
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} catch(_) {
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return new Buffer(0)
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}
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return Buffer.concat([ b1, b2 ])
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}
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function AnonymousUser() {
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return {
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name: undefined,
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// groups without '$' are going to be deprecated eventually
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groups: [ '$all', '$anonymous', '@all', '@anonymous', 'all', 'undefined', 'anonymous' ],
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real_groups: [],
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}
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}
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function AuthenticatedUser(name, groups) {
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var _groups = (groups || []).concat([ '$all', '$authenticated', '@all', '@authenticated', 'all' ])
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return {
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name: name,
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groups: _groups,
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real_groups: groups,
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}
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}
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