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;(function () {
'use strict'
var fs = require('fs')
var ursa = require('ursa')
var logger = require('../helpers/logger')
var Pods = require('../models/pods')
var utils = require('../helpers/utils')
var miscMiddleware = {
cache: cache,
decryptBody: decryptBody
}
function cache (cache) {
return function (req, res, next) {
// If we want explicitly a cache
// Or if we don't specify if we want a cache or no and we are in production
if (cache === true || (cache !== false && process.env.NODE_ENV === 'production')) {
res.setHeader('Cache-Control', 'public')
} else {
res.setHeader('Cache-Control', 'no-cache, no-store, max-age=0, must-revalidate')
}
next()
}
}
function decryptBody (req, res, next) {
var url = req.body.signature.url
Pods.findByUrl(url, function (err, pod) {
if (err) {
logger.error('Cannot get signed url in decryptBody.', { error: err })
return res.sendStatus(500)
}
if (pod === null) {
logger.error('Unknown pod %s.', url)
return res.sendStatus(403)
}
logger.debug('Decrypting body from %s.', url)
var crt = ursa.createPublicKey(pod.publicKey)
var signature_ok = crt.hashAndVerify('sha256', new Buffer(req.body.signature.url).toString('hex'), req.body.signature.signature, 'hex')
if (signature_ok === true) {
var myKey = ursa.createPrivateKey(fs.readFileSync(utils.getCertDir() + 'peertube.key.pem'))
var decryptedKey = myKey.decrypt(req.body.key, 'hex', 'utf8')
req.body.data = JSON.parse(utils.symetricDecrypt(req.body.data, decryptedKey))
delete req.body.key
} else {
logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.url)
return res.sendStatus(403)
}
next()
})
}
// ---------------------------------------------------------------------------
module.exports = miscMiddleware
})()
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