server/helpers/peertube-crypto.js

   1 'use strict'
   2
   3 const bcrypt = require('bcrypt')
   4 const crypto = require('crypto')
   5 const fs = require('fs')
   6 const openssl = require('openssl-wrapper')
   7 const ursa = require('ursa')
   8
   9 const constants = require('../initializers/constants')
  10 const logger = require('./logger')
  11
  12 const algorithm = 'aes-256-ctr'
  13
  14 const peertubeCrypto = {
  15   checkSignature,
  16   comparePassword,
  17   createCertsIfNotExist,
  18   cryptPassword,
  19   sign
  20 }
  21
  22 function checkSignature (publicKey, rawData, hexSignature) {
  23   const crt = ursa.createPublicKey(publicKey)
  24   const isValid = crt.hashAndVerify('sha256', new Buffer(rawData).toString('hex'), hexSignature, 'hex')
  25   return isValid
  26 }
  27
  28 function comparePassword (plainPassword, hashPassword, callback) {
  29   bcrypt.compare(plainPassword, hashPassword, function (err, isPasswordMatch) {
  30     if (err) return callback(err)
  31
  32     return callback(null, isPasswordMatch)
  33   })
  34 }
  35
  36 function createCertsIfNotExist (callback) {
  37   certsExist(function (exist) {
  38     if (exist === true) {
  39       return callback(null)
  40     }
  41
  42     createCerts(function (err) {
  43       return callback(err)
  44     })
  45   })
  46 }
  47
  48 function cryptPassword (password, callback) {
  49   bcrypt.genSalt(constants.BCRYPT_SALT_SIZE, function (err, salt) {
  50     if (err) return callback(err)
  51
  52     bcrypt.hash(password, salt, function (err, hash) {
  53       return callback(err, hash)
  54     })
  55   })
  56 }
  57
  58 function sign (data) {
  59   const myKey = ursa.createPrivateKey(fs.readFileSync(constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem'))
  60   const signature = myKey.hashAndSign('sha256', data, 'utf8', 'hex')
  61
  62   return signature
  63 }
  64
  65 // ---------------------------------------------------------------------------
  66
  67 module.exports = peertubeCrypto
  68
  69 // ---------------------------------------------------------------------------
  70
  71 function certsExist (callback) {
  72   fs.exists(constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem', function (exists) {
  73     return callback(exists)
  74   })
  75 }
  76
  77 function createCerts (callback) {
  78   certsExist(function (exist) {
  79     if (exist === true) {
  80       const string = 'Certs already exist.'
  81       logger.warning(string)
  82       return callback(new Error(string))
  83     }
  84
  85     logger.info('Generating a RSA key...')
  86
  87     let options = {
  88       'out': constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem',
  89       '2048': false
  90     }
  91     openssl.exec('genrsa', options, function (err) {
  92       if (err) {
  93         logger.error('Cannot create private key on this pod.')
  94         return callback(err)
  95       }
  96       logger.info('RSA key generated.')
  97
  98       options = {
  99         'in': constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem',
 100         'pubout': true,
 101         'out': constants.CONFIG.STORAGE.CERT_DIR + 'peertube.pub'
 102       }
 103       logger.info('Manage public key...')
 104       openssl.exec('rsa', options, function (err) {
 105         if (err) {
 106           logger.error('Cannot create public key on this pod.')
 107           return callback(err)
 108         }
 109
 110         logger.info('Public key managed.')
 111         return callback(null)
 112       })
 113     })
 114   })
 115 }
 116
 117 function generatePassword (callback) {
 118   crypto.randomBytes(32, function (err, buf) {
 119     if (err) return callback(err)
 120
 121     callback(null, buf.toString('utf8'))
 122   })
 123 }