]>
Commit | Line | Data |
---|---|---|
dac0a531 C |
1 | ;(function () { |
2 | 'use strict' | |
3 | ||
4 | var config = require('config') | |
5 | var crypto = require('crypto') | |
6 | var fs = require('fs') | |
7 | var openssl = require('openssl-wrapper') | |
b3077e41 | 8 | var path = require('path') |
dac0a531 C |
9 | var ursa = require('ursa') |
10 | ||
11 | var logger = require('./logger') | |
12 | ||
b3077e41 | 13 | var certDir = path.join(__dirname, '..', config.get('storage.certs')) |
dac0a531 C |
14 | var algorithm = 'aes-256-ctr' |
15 | ||
16 | var peertubeCrypto = { | |
17 | checkSignature: checkSignature, | |
18 | createCertsIfNotExist: createCertsIfNotExist, | |
19 | decrypt: decrypt, | |
20 | encrypt: encrypt, | |
21 | getCertDir: getCertDir, | |
22 | sign: sign | |
23 | } | |
24 | ||
25 | function checkSignature (public_key, raw_data, hex_signature) { | |
26 | var crt = ursa.createPublicKey(public_key) | |
27 | var is_valid = crt.hashAndVerify('sha256', new Buffer(raw_data).toString('hex'), hex_signature, 'hex') | |
28 | return is_valid | |
29 | } | |
30 | ||
31 | function createCertsIfNotExist (callback) { | |
32 | certsExist(function (exist) { | |
33 | if (exist === true) { | |
34 | return callback(null) | |
35 | } | |
36 | ||
37 | createCerts(function (err) { | |
38 | return callback(err) | |
39 | }) | |
40 | }) | |
41 | } | |
42 | ||
43 | function decrypt (key, data, callback) { | |
44 | fs.readFile(getCertDir() + 'peertube.key.pem', function (err, file) { | |
45 | if (err) return callback(err) | |
46 | ||
47 | var my_private_key = ursa.createPrivateKey(file) | |
48 | var decrypted_key = my_private_key.decrypt(key, 'hex', 'utf8') | |
49 | var decrypted_data = symetricDecrypt(data, decrypted_key) | |
50 | ||
51 | return callback(null, decrypted_data) | |
52 | }) | |
53 | } | |
54 | ||
55 | function encrypt (public_key, data, callback) { | |
56 | var crt = ursa.createPublicKey(public_key) | |
57 | ||
58 | symetricEncrypt(data, function (err, dataEncrypted) { | |
59 | if (err) return callback(err) | |
60 | ||
61 | var key = crt.encrypt(dataEncrypted.password, 'utf8', 'hex') | |
62 | var encrypted = { | |
63 | data: dataEncrypted.crypted, | |
64 | key: key | |
65 | } | |
66 | ||
67 | callback(null, encrypted) | |
68 | }) | |
69 | } | |
70 | ||
71 | function getCertDir () { | |
72 | return certDir | |
73 | } | |
74 | ||
75 | function sign (data) { | |
76 | var myKey = ursa.createPrivateKey(fs.readFileSync(certDir + 'peertube.key.pem')) | |
77 | var signature = myKey.hashAndSign('sha256', data, 'utf8', 'hex') | |
78 | ||
79 | return signature | |
80 | } | |
81 | ||
82 | // --------------------------------------------------------------------------- | |
83 | ||
84 | module.exports = peertubeCrypto | |
85 | ||
86 | // --------------------------------------------------------------------------- | |
87 | ||
88 | function certsExist (callback) { | |
89 | fs.exists(certDir + 'peertube.key.pem', function (exists) { | |
90 | return callback(exists) | |
91 | }) | |
92 | } | |
93 | ||
94 | function createCerts (callback) { | |
95 | certsExist(function (exist) { | |
96 | if (exist === true) { | |
97 | var string = 'Certs already exist.' | |
98 | logger.warning(string) | |
99 | return callback(new Error(string)) | |
100 | } | |
101 | ||
102 | logger.info('Generating a RSA key...') | |
103 | openssl.exec('genrsa', { 'out': certDir + 'peertube.key.pem', '2048': false }, function (err) { | |
104 | if (err) { | |
8425cb89 | 105 | logger.error('Cannot create private key on this pod.') |
dac0a531 C |
106 | return callback(err) |
107 | } | |
108 | logger.info('RSA key generated.') | |
109 | ||
110 | logger.info('Manage public key...') | |
111 | openssl.exec('rsa', { 'in': certDir + 'peertube.key.pem', 'pubout': true, 'out': certDir + 'peertube.pub' }, function (err) { | |
112 | if (err) { | |
8425cb89 | 113 | logger.error('Cannot create public key on this pod.') |
dac0a531 C |
114 | return callback(err) |
115 | } | |
116 | ||
117 | logger.info('Public key managed.') | |
118 | return callback(null) | |
119 | }) | |
120 | }) | |
121 | }) | |
122 | } | |
123 | ||
124 | function generatePassword (callback) { | |
125 | crypto.randomBytes(32, function (err, buf) { | |
8425cb89 | 126 | if (err) return callback(err) |
dac0a531 C |
127 | |
128 | callback(null, buf.toString('utf8')) | |
129 | }) | |
130 | } | |
131 | ||
132 | function symetricDecrypt (text, password) { | |
133 | var decipher = crypto.createDecipher(algorithm, password) | |
134 | var dec = decipher.update(text, 'hex', 'utf8') | |
135 | dec += decipher.final('utf8') | |
136 | return dec | |
137 | } | |
138 | ||
139 | function symetricEncrypt (text, callback) { | |
140 | generatePassword(function (err, password) { | |
8425cb89 | 141 | if (err) return callback(err) |
dac0a531 C |
142 | |
143 | var cipher = crypto.createCipher(algorithm, password) | |
144 | var crypted = cipher.update(text, 'utf8', 'hex') | |
145 | crypted += cipher.final('hex') | |
146 | callback(null, { crypted: crypted, password: password }) | |
147 | }) | |
148 | } | |
149 | })() |