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'use strict'
const crypto = require('crypto')
const bcrypt = require('bcrypt')
const fs = require('fs')
const openssl = require('openssl-wrapper')
const pathUtils = require('path')
const constants = require('../initializers/constants')
const logger = require('./logger')
const peertubeCrypto = {
checkSignature,
comparePassword,
createCertsIfNotExist,
cryptPassword,
getMyPrivateCert,
getMyPublicCert,
sign
}
function checkSignature (publicKey, data, hexSignature) {
const verify = crypto.createVerify(constants.SIGNATURE_ALGORITHM)
let dataString
if (typeof data === 'string') {
dataString = data
} else {
try {
dataString = JSON.stringify(data)
} catch (err) {
logger.error('Cannot check signature.', { error: err })
return false
}
}
verify.update(dataString, 'utf8')
const isValid = verify.verify(publicKey, hexSignature, constants.SIGNATURE_ENCODING)
return isValid
}
function sign (data) {
const sign = crypto.createSign(constants.SIGNATURE_ALGORITHM)
let dataString
if (typeof data === 'string') {
dataString = data
} else {
try {
dataString = JSON.stringify(data)
} catch (err) {
logger.error('Cannot sign data.', { error: err })
return ''
}
}
sign.update(dataString, 'utf8')
// TODO: make async
const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
const myKey = fs.readFileSync(certPath)
const signature = sign.sign(myKey, constants.SIGNATURE_ENCODING)
return signature
}
function comparePassword (plainPassword, hashPassword, callback) {
bcrypt.compare(plainPassword, hashPassword, function (err, isPasswordMatch) {
if (err) return callback(err)
return callback(null, isPasswordMatch)
})
}
function createCertsIfNotExist (callback) {
certsExist(function (exist) {
if (exist === true) {
return callback(null)
}
createCerts(function (err) {
return callback(err)
})
})
}
function cryptPassword (password, callback) {
bcrypt.genSalt(constants.BCRYPT_SALT_SIZE, function (err, salt) {
if (err) return callback(err)
bcrypt.hash(password, salt, function (err, hash) {
return callback(err, hash)
})
})
}
function getMyPrivateCert (callback) {
const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
fs.readFile(certPath, 'utf8', callback)
}
function getMyPublicCert (callback) {
const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PUBLIC_CERT_NAME)
fs.readFile(certPath, 'utf8', callback)
}
// ---------------------------------------------------------------------------
module.exports = peertubeCrypto
// ---------------------------------------------------------------------------
function certsExist (callback) {
const certPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
fs.exists(certPath, function (exists) {
return callback(exists)
})
}
function createCerts (callback) {
certsExist(function (exist) {
if (exist === true) {
const string = 'Certs already exist.'
logger.warning(string)
return callback(new Error(string))
}
logger.info('Generating a RSA key...')
const privateCertPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, constants.PRIVATE_CERT_NAME)
const genRsaOptions = {
'out': privateCertPath,
'2048': false
}
openssl.exec('genrsa', genRsaOptions, function (err) {
if (err) {
logger.error('Cannot create private key on this pod.')
return callback(err)
}
logger.info('RSA key generated.')
logger.info('Managing public key...')
const publicCertPath = pathUtils.join(constants.CONFIG.STORAGE.CERT_DIR, 'peertube.pub')
const rsaOptions = {
'in': privateCertPath,
'pubout': true,
'out': publicCertPath
}
openssl.exec('rsa', rsaOptions, function (err) {
if (err) {
logger.error('Cannot create public key on this pod.')
return callback(err)
}
logger.info('Public key managed.')
return callback(null)
})
})
})
}
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