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;(function () {
'use strict'
var ursa = require('ursa')
var fs = require('fs')
var logger = require('../src/logger')
var utils = require('../src/utils')
var PodsDB = require('../src/database').PodsDB
var middleware = {}
middleware.cache = function (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()
}
}
middleware.decryptBody = function (req, res, next) {
logger.debug('Decrypting body.')
PodsDB.findOne({ url: req.body.signature.url }, function (err, pod) {
if (err) {
logger.error('Cannot get signed url in decryptBody.', { error: err })
res.sendStatus(500)
}
logger.debug('Found one pod which could send the message.', { pod: pod.publicKey, url: req.body.signature.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.certDir + 'petube.key.pem'))
var decryptedKey = myKey.decrypt(req.body.key, 'hex', 'utf8')
logger.debug(decryptedKey)
req.body.data = JSON.parse(utils.symetricDecrypt(req.body.data, decryptedKey))
logger.debug('Decrypted.', { body: req.body })
} else {
logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.url)
res.sendStatus(500)
}
next()
})
}
module.exports = middleware
})()
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