server/helpers/peertube-crypto.js

   1 'use strict'
   2
   3 const crypto = require('crypto')
   4 const bcrypt = require('bcrypt')
   5 const fs = require('fs')
   6 const openssl = require('openssl-wrapper')
   7
   8 const constants = require('../initializers/constants')
   9 const logger = require('./logger')
  10
  11 const peertubeCrypto = {
  12   checkSignature,
  13   comparePassword,
  14   createCertsIfNotExist,
  15   cryptPassword,
  16   sign
  17 }
  18
  19 function checkSignature (publicKey, data, hexSignature) {
  20   const verify = crypto.createVerify(constants.SIGNATURE_ALGORITHM)
  21
  22   let dataString
  23   if (typeof data === 'string') {
  24     dataString = data
  25   } else {
  26     try {
  27       dataString = JSON.stringify(data)
  28     } catch (err) {
  29       logger.error('Cannot check signature.', { error: err })
  30       return false
  31     }
  32   }
  33
  34   verify.update(dataString, 'utf8')
  35
  36   const isValid = verify.verify(publicKey, hexSignature, constants.SIGNATURE_ENCODING)
  37   return isValid
  38 }
  39
  40 function sign (data) {
  41   const sign = crypto.createSign(constants.SIGNATURE_ALGORITHM)
  42
  43   let dataString
  44   if (typeof data === 'string') {
  45     dataString = data
  46   } else {
  47     try {
  48       dataString = JSON.stringify(data)
  49     } catch (err) {
  50       logger.error('Cannot sign data.', { error: err })
  51       return ''
  52     }
  53   }
  54
  55   sign.update(dataString, 'utf8')
  56
  57   // TODO: make async
  58   const myKey = fs.readFileSync(constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem')
  59   const signature = sign.sign(myKey, constants.SIGNATURE_ENCODING)
  60
  61   return signature
  62 }
  63
  64 function comparePassword (plainPassword, hashPassword, callback) {
  65   bcrypt.compare(plainPassword, hashPassword, function (err, isPasswordMatch) {
  66     if (err) return callback(err)
  67
  68     return callback(null, isPasswordMatch)
  69   })
  70 }
  71
  72 function createCertsIfNotExist (callback) {
  73   certsExist(function (exist) {
  74     if (exist === true) {
  75       return callback(null)
  76     }
  77
  78     createCerts(function (err) {
  79       return callback(err)
  80     })
  81   })
  82 }
  83
  84 function cryptPassword (password, callback) {
  85   bcrypt.genSalt(constants.BCRYPT_SALT_SIZE, function (err, salt) {
  86     if (err) return callback(err)
  87
  88     bcrypt.hash(password, salt, function (err, hash) {
  89       return callback(err, hash)
  90     })
  91   })
  92 }
  93
  94 // ---------------------------------------------------------------------------
  95
  96 module.exports = peertubeCrypto
  97
  98 // ---------------------------------------------------------------------------
  99
 100 function certsExist (callback) {
 101   fs.exists(constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem', function (exists) {
 102     return callback(exists)
 103   })
 104 }
 105
 106 function createCerts (callback) {
 107   certsExist(function (exist) {
 108     if (exist === true) {
 109       const string = 'Certs already exist.'
 110       logger.warning(string)
 111       return callback(new Error(string))
 112     }
 113
 114     logger.info('Generating a RSA key...')
 115
 116     let options = {
 117       'out': constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem',
 118       '2048': false
 119     }
 120     openssl.exec('genrsa', options, function (err) {
 121       if (err) {
 122         logger.error('Cannot create private key on this pod.')
 123         return callback(err)
 124       }
 125       logger.info('RSA key generated.')
 126
 127       options = {
 128         'in': constants.CONFIG.STORAGE.CERT_DIR + 'peertube.key.pem',
 129         'pubout': true,
 130         'out': constants.CONFIG.STORAGE.CERT_DIR + 'peertube.pub'
 131       }
 132       logger.info('Manage public key...')
 133       openssl.exec('rsa', options, function (err) {
 134         if (err) {
 135           logger.error('Cannot create public key on this pod.')
 136           return callback(err)
 137         }
 138
 139         logger.info('Public key managed.')
 140         return callback(null)
 141       })
 142     })
 143   })
 144 }