aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/utils.js
blob: 0b21565dd74d3db9ae23db3a09cc9f28d5994d0b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
;(function () {
  'use strict'

  var request = require('request')
  var replay = require('request-replay')
  var ursa = require('ursa')
  var config = require('config')
  var fs = require('fs')
  var openssl = require('openssl-wrapper')
  var crypto = require('crypto')

  var logger = require('./logger')

  var http = config.get('webserver.https') ? 'https' : 'http'
  var host = config.get('webserver.host')
  var port = config.get('webserver.port')
  var algorithm = 'aes-256-ctr'

  var utils = {}

  // ----------- Private functions ----------

  function makeRetryRequest (params, from_url, to_pod, signature, callbackEach) {
    // Append the signature
    if (signature) {
      params.json.signature = {
        url: from_url,
        signature: signature
      }
    }

    logger.debug('Sending informations to %s', to_pod.url, { params: params })

    // Replay 15 times, with factor 3
    replay(
      request.post(params, function (err, response, body) {
        callbackEach(err, response, body, to_pod.url)
      }),
      {
        retries: 10,
        factor: 3,
        maxTimeout: Infinity,
        errorCodes: [ 'EADDRINFO', 'ETIMEDOUT', 'ECONNRESET', 'ESOCKETTIMEDOUT', 'ENOTFOUND', 'ECONNREFUSED' ]
      }
    ).on('replay', function (replay) {
      logger.info('Replaying request to %s. Request failed: %d %s. Replay number: #%d. Will retry in: %d ms.',
        params.url, replay.error.code, replay.error.message, replay.number, replay.delay)
    })
  }

  // ----------- Public attributes ----------
  utils.certDir = __dirname + '/../' + config.get('storage.certs')

  // { path, data }
  utils.makeMultipleRetryRequest = function (all, pods, callbackEach, callback) {
    if (!callback) {
      callback = callbackEach
      callbackEach = function () {}
    }

    var url = http + '://' + host + ':' + port
    var signature

    // Signature ?
    if (all.method === 'POST' && all.data && all.sign === true) {
      var myKey = ursa.createPrivateKey(fs.readFileSync(utils.certDir + 'petube.key.pem'))
      signature = myKey.hashAndSign('sha256', url, 'utf8', 'hex')
    }

    // Make a request for each pod
    for (var pod of pods) {
      var params = {
        url: pod.url + all.path,
        method: all.method
      }

      // Add data with POST requst ?
      if (all.method === 'POST' && all.data) {
        logger.debug('Make a POST request.')

        // Encrypt data ?
        if (all.encrypt === true) {
          logger.debug(pod.publicKey)
          var crt = ursa.createPublicKey(pod.publicKey)

          // TODO: ES6 with let
          ;(function (crt_copy, copy_params, copy_url, copy_pod, copy_signature) {
            utils.symetricEncrypt(JSON.stringify(all.data), function (err, dataEncrypted) {
              if (err) throw err

              var passwordEncrypted = crt_copy.encrypt(dataEncrypted.password, 'utf8', 'hex')
              copy_params.json = {
                data: dataEncrypted.crypted,
                key: passwordEncrypted
              }

              makeRetryRequest(copy_params, copy_url, copy_pod, copy_signature, callbackEach)
            })
          })(crt, params, url, pod, signature)
        } else {
          params.json = { data: all.data }
          makeRetryRequest(params, url, pod, signature, callbackEach)
        }
      } else {
        logger.debug('Make a GET/DELETE request')
        makeRetryRequest(params, url, pod, signature, callbackEach)
      }
    }

    return callback()
  }

  utils.certsExist = function (callback) {
    fs.exists(utils.certDir + 'petube.key.pem', function (exists) {
      return callback(exists)
    })
  }

  utils.createCerts = function (callback) {
    utils.certsExist(function (exist) {
      if (exist === true) {
        var string = 'Certs already exist.'
        logger.warning(string)
        return callback(new Error(string))
      }

      logger.debug('Gen RSA keys...')
      openssl.exec('genrsa', { 'out': utils.certDir + 'petube.key.pem' }, function (err) {
        if (err) {
          logger.error('Cannot create private key on this pod.', { error: err })
          return callback(err)
        }

        logger.debug('Manage public key...')
        openssl.exec('rsa', { 'in': utils.certDir + 'petube.key.pem', 'pubout': true, 'out': utils.certDir + 'petube.pub' }, function (err) {
          if (err) {
            logger.error('Cannot create public key on this pod .', { error: err })
            return callback(err)
          }

          return callback(null)
        })
      })
    })
  }

  utils.createCertsIfNotExist = function (callback) {
    utils.certsExist(function (exist) {
      if (exist === true) {
        return callback(null)
      }

      utils.createCerts(function (err) {
        return callback(err)
      })
    })
  }

  utils.generatePassword = function (callback) {
    crypto.randomBytes(32, function (err, buf) {
      if (err) {
        return callback(err)
      }

      callback(null, buf.toString('utf8'))
    })
  }

  utils.symetricEncrypt = function (text, callback) {
    utils.generatePassword(function (err, password) {
      if (err) {
        return callback(err)
      }

      var cipher = crypto.createCipher(algorithm, password)
      var crypted = cipher.update(text, 'utf8', 'hex')
      crypted += cipher.final('hex')
      callback(null, { crypted: crypted, password: password })
    })
  }

  utils.symetricDecrypt = function (text, password) {
    var decipher = crypto.createDecipher(algorithm, password)
    var dec = decipher.update(text, 'hex', 'utf8')
    dec += decipher.final('utf8')
    return dec
  }

  module.exports = utils
})()