3 var config = require('config')
4 var crypto = require('crypto')
6 var openssl = require('openssl-wrapper')
7 var path = require('path')
8 var ursa = require('ursa')
10 var logger = require('./logger')
12 var certDir = path.join(__dirname, '..', config.get('storage.certs'))
13 var algorithm = 'aes-256-ctr'
15 var peertubeCrypto = {
16 checkSignature: checkSignature,
17 createCertsIfNotExist: createCertsIfNotExist,
20 getCertDir: getCertDir,
24 function checkSignature (public_key, raw_data, hex_signature) {
25 var crt = ursa.createPublicKey(public_key)
26 var is_valid = crt.hashAndVerify('sha256', new Buffer(raw_data).toString('hex'), hex_signature, 'hex')
30 function createCertsIfNotExist (callback) {
31 certsExist(function (exist) {
36 createCerts(function (err) {
42 function decrypt (key, data, callback) {
43 fs.readFile(getCertDir() + 'peertube.key.pem', function (err, file) {
44 if (err) return callback(err)
46 var my_private_key = ursa.createPrivateKey(file)
47 var decrypted_key = my_private_key.decrypt(key, 'hex', 'utf8')
48 var decrypted_data = symetricDecrypt(data, decrypted_key)
50 return callback(null, decrypted_data)
54 function encrypt (public_key, data, callback) {
55 var crt = ursa.createPublicKey(public_key)
57 symetricEncrypt(data, function (err, dataEncrypted) {
58 if (err) return callback(err)
60 var key = crt.encrypt(dataEncrypted.password, 'utf8', 'hex')
62 data: dataEncrypted.crypted,
66 callback(null, encrypted)
70 function getCertDir () {
74 function sign (data) {
75 var myKey = ursa.createPrivateKey(fs.readFileSync(certDir + 'peertube.key.pem'))
76 var signature = myKey.hashAndSign('sha256', data, 'utf8', 'hex')
81 // ---------------------------------------------------------------------------
83 module.exports = peertubeCrypto
85 // ---------------------------------------------------------------------------
87 function certsExist (callback) {
88 fs.exists(certDir + 'peertube.key.pem', function (exists) {
89 return callback(exists)
93 function createCerts (callback) {
94 certsExist(function (exist) {
96 var string = 'Certs already exist.'
97 logger.warning(string)
98 return callback(new Error(string))
101 logger.info('Generating a RSA key...')
102 openssl.exec('genrsa', { 'out': certDir + 'peertube.key.pem', '2048': false }, function (err) {
104 logger.error('Cannot create private key on this pod.')
107 logger.info('RSA key generated.')
109 logger.info('Manage public key...')
110 openssl.exec('rsa', { 'in': certDir + 'peertube.key.pem', 'pubout': true, 'out': certDir + 'peertube.pub' }, function (err) {
112 logger.error('Cannot create public key on this pod.')
116 logger.info('Public key managed.')
117 return callback(null)
123 function generatePassword (callback) {
124 crypto.randomBytes(32, function (err, buf) {
125 if (err) return callback(err)
127 callback(null, buf.toString('utf8'))
131 function symetricDecrypt (text, password) {
132 var decipher = crypto.createDecipher(algorithm, password)
133 var dec = decipher.update(text, 'hex', 'utf8')
134 dec += decipher.final('utf8')
138 function symetricEncrypt (text, callback) {
139 generatePassword(function (err, password) {
140 if (err) return callback(err)
142 var cipher = crypto.createCipher(algorithm, password)
143 var crypted = cipher.update(text, 'utf8', 'hex')
144 crypted += cipher.final('hex')
145 callback(null, { crypted: crypted, password: password })