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 const pathUtils = require('path')
   8
   9 const constants = require('../initializers/constants')
  10 const logger = require('./logger')
  11
  12 const peertubeCrypto = {
  13   checkSignature,
  14   comparePassword,
  15   createCertsIfNotExist,
  16   cryptPassword,
  17   getMyPrivateCert,
  18   getMyPublicCert,
  19   sign
  20 }
  21
  22 function checkSignature (publicKey, data, hexSignature) {
  23   const verify = crypto.createVerify(constants.SIGNATURE_ALGORITHM)
  24
  25   let dataString
  26   if (typeof data === 'string') {
  27     dataString = data
  28   } else {
  29     try {
  30       dataString = JSON.stringify(data)
  31     } catch (err) {
  32       logger.error('Cannot check signature.', { error: err })
  33       return false
  34     }
  35   }
  36
  37   verify.update(dataString, 'utf8')
  38
  39   const isValid = verify.verify(publicKey, hexSignature, constants.SIGNATURE_ENCODING)
  40   return isValid
  41 }
  42
  43 function sign (data) {
  44   const sign = crypto.createSign(constants.SIGNATURE_ALGORITHM)
  45
  46   let dataString
  47   if (typeof data === 'string') {
  48     dataString = data
  49   } else {
  50     try {
  51       dataString = JSON.stringify(data)
  52     } catch (err) {
  53       logger.error('Cannot sign data.', { error: err })
  54       return ''
  55     }
  56   }
  57
  58   sign.update(dataString, 'utf8')
  59
  60   // TODO: make async
  61   const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
  62   const myKey = fs.readFileSync(certPath)
  63   const signature = sign.sign(myKey, constants.SIGNATURE_ENCODING)
  64
  65   return signature
  66 }
  67
  68 function comparePassword (plainPassword, hashPassword, callback) {
  69   bcrypt.compare(plainPassword, hashPassword, function (err, isPasswordMatch) {
  70     if (err) return callback(err)
  71
  72     return callback(null, isPasswordMatch)
  73   })
  74 }
  75
  76 function createCertsIfNotExist (callback) {
  77   certsExist(function (exist) {
  78     if (exist === true) {
  79       return callback(null)
  80     }
  81
  82     createCerts(function (err) {
  83       return callback(err)
  84     })
  85   })
  86 }
  87
  88 function cryptPassword (password, callback) {
  89   bcrypt.genSalt(constants.BCRYPT_SALT_SIZE, function (err, salt) {
  90     if (err) return callback(err)
  91
  92     bcrypt.hash(password, salt, function (err, hash) {
  93       return callback(err, hash)
  94     })
  95   })
  96 }
  97
  98 function getMyPrivateCert (callback) {
  99   const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
 100   fs.readFile(certPath, 'utf8', callback)
 101 }
 102
 103 function getMyPublicCert (callback) {
 104   const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PUBLIC_CERT_NAME)
 105   fs.readFile(certPath, 'utf8', callback)
 106 }
 107
 108 // ---------------------------------------------------------------------------
 109
 110 module.exports = peertubeCrypto
 111
 112 // ---------------------------------------------------------------------------
 113
 114 function certsExist (callback) {
 115   const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
 116   fs.exists(certPath, function (exists) {
 117     return callback(exists)
 118   })
 119 }
 120
 121 function createCerts (callback) {
 122   certsExist(function (exist) {
 123     if (exist === true) {
 124       const string = 'Certs already exist.'
 125       logger.warning(string)
 126       return callback(new Error(string))
 127     }
 128
 129     logger.info('Generating a RSA key...')
 130
 131     const privateCertPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
 132     const genRsaOptions = {
 133       'out': privateCertPath,
 134       '2048': false
 135     }
 136     openssl.exec('genrsa', genRsaOptions, function (err) {
 137       if (err) {
 138         logger.error('Cannot create private key on this pod.')
 139         return callback(err)
 140       }
 141
 142       logger.info('RSA key generated.')
 143       logger.info('Managing public key...')
 144
 145       const publicCertPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, 'peertube.pub')
 146       const rsaOptions = {
 147         'in': privateCertPath,
 148         'pubout': true,
 149         'out': publicCertPath
 150       }
 151       openssl.exec('rsa', rsaOptions, function (err) {
 152         if (err) {
 153           logger.error('Cannot create public key on this pod.')
 154           return callback(err)
 155         }
 156
 157         logger.info('Public key managed.')
 158         return callback(null)
 159       })
 160     })
 161   })
 162 }