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'use strict'
const Router = require('express').Router
const passport = require('passport')
const SamlStrategy = require('passport-saml').Strategy
const config = require('../../../config')
const models = require('../../../models')
const logger = require('../../../logger')
const {urlencodedParser} = require('../../utils')
const fs = require('fs')
const intersection = function (array1, array2) { return array1.filter((n) => array2.includes(n)) }
let samlAuth = module.exports = Router()
passport.use(new SamlStrategy({
callbackUrl: config.serverURL + '/auth/saml/callback',
entryPoint: config.saml.idpSsoUrl,
issuer: config.saml.issuer || config.serverURL,
cert: fs.readFileSync(config.saml.idpCert, 'utf-8'),
identifierFormat: config.saml.identifierFormat
}, function (user, done) {
// check authorization if needed
if (config.saml.externalGroups && config.saml.grouptAttribute) {
var externalGroups = intersection(config.saml.externalGroups, user[config.saml.groupAttribute])
if (externalGroups.length > 0) {
logger.error('saml permission denied: ' + externalGroups.join(', '))
return done('Permission denied', null)
}
}
if (config.saml.requiredGroups && config.saml.grouptAttribute) {
if (intersection(config.saml.requiredGroups, user[config.saml.groupAttribute]).length === 0) {
logger.error('saml permission denied')
return done('Permission denied', null)
}
}
// user creation
var uuid = user[config.saml.attribute.id] || user.nameID
var profile = {
provider: 'saml',
id: 'SAML-' + uuid,
username: user[config.saml.attribute.username] || user.nameID,
emails: user[config.saml.attribute.email] ? [user[config.saml.attribute.email]] : []
}
if (profile.emails.length === 0 && config.saml.identifierFormat === 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress') {
profile.emails.push(user.nameID)
}
var stringifiedProfile = JSON.stringify(profile)
models.User.findOrCreate({
where: {
profileid: profile.id.toString()
},
defaults: {
profile: stringifiedProfile
}
}).spread(function (user, created) {
if (user) {
var needSave = false
if (user.profile !== stringifiedProfile) {
user.profile = stringifiedProfile
needSave = true
}
if (needSave) {
user.save().then(function () {
if (config.debug) { logger.debug('user login: ' + user.id) }
return done(null, user)
})
} else {
if (config.debug) { logger.debug('user login: ' + user.id) }
return done(null, user)
}
}
}).catch(function (err) {
logger.error('saml auth failed: ' + err)
return done(err, null)
})
}))
samlAuth.get('/auth/saml',
passport.authenticate('saml', {
successReturnToOrRedirect: config.serverURL + '/',
failureRedirect: config.serverURL + '/'
})
)
samlAuth.post('/auth/saml/callback', urlencodedParser,
passport.authenticate('saml', {
successReturnToOrRedirect: config.serverURL + '/',
failureRedirect: config.serverURL + '/'
})
)
samlAuth.get('/auth/saml/metadata', function (req, res) {
res.type('application/xml')
res.send(passport._strategy('saml').generateServiceProviderMetadata())
})
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