You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.7 KiB
90 lines
2.7 KiB
6 years ago
|
'use strict'
|
||
|
|
|
||
|
|
var crypto = require('crypto')
|
||
|
|
|
||
|
|
function randomString (size) {
|
||
|
|
var bits = (size + 1) * 6
|
||
|
|
var buffer = crypto.randomBytes(Math.ceil(bits / 8))
|
||
|
|
var string = buffer.toString('base64').replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '')
|
||
|
|
return string.slice(0, size)
|
||
|
|
}
|
||
|
|
|
||
|
|
function calculatePayloadHash (payload, algorithm, contentType) {
|
||
|
|
var hash = crypto.createHash(algorithm)
|
||
|
|
hash.update('hawk.1.payload\n')
|
||
|
|
hash.update((contentType ? contentType.split(';')[0].trim().toLowerCase() : '') + '\n')
|
||
|
|
hash.update(payload || '')
|
||
|
|
hash.update('\n')
|
||
|
|
return hash.digest('base64')
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.calculateMac = function (credentials, opts) {
|
||
|
|
var normalized = 'hawk.1.header\n' +
|
||
|
|
opts.ts + '\n' +
|
||
|
|
opts.nonce + '\n' +
|
||
|
|
(opts.method || '').toUpperCase() + '\n' +
|
||
|
|
opts.resource + '\n' +
|
||
|
|
opts.host.toLowerCase() + '\n' +
|
||
|
|
opts.port + '\n' +
|
||
|
|
(opts.hash || '') + '\n'
|
||
|
|
|
||
|
|
if (opts.ext) {
|
||
|
|
normalized = normalized + opts.ext.replace('\\', '\\\\').replace('\n', '\\n')
|
||
|
|
}
|
||
|
|
|
||
|
|
normalized = normalized + '\n'
|
||
|
|
|
||
|
|
if (opts.app) {
|
||
|
|
normalized = normalized + opts.app + '\n' + (opts.dlg || '') + '\n'
|
||
|
|
}
|
||
|
|
|
||
|
|
var hmac = crypto.createHmac(credentials.algorithm, credentials.key).update(normalized)
|
||
|
|
var digest = hmac.digest('base64')
|
||
|
|
return digest
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.header = function (uri, method, opts) {
|
||
|
|
var timestamp = opts.timestamp || Math.floor((Date.now() + (opts.localtimeOffsetMsec || 0)) / 1000)
|
||
|
|
var credentials = opts.credentials
|
||
|
|
if (!credentials || !credentials.id || !credentials.key || !credentials.algorithm) {
|
||
|
|
return ''
|
||
|
|
}
|
||
|
|
|
||
|
|
if (['sha1', 'sha256'].indexOf(credentials.algorithm) === -1) {
|
||
|
|
return ''
|
||
|
|
}
|
||
|
|
|
||
|
|
var artifacts = {
|
||
|
|
ts: timestamp,
|
||
|
|
nonce: opts.nonce || randomString(6),
|
||
|
|
method: method,
|
||
|
|
resource: uri.pathname + (uri.search || ''),
|
||
|
|
host: uri.hostname,
|
||
|
|
port: uri.port || (uri.protocol === 'http:' ? 80 : 443),
|
||
|
|
hash: opts.hash,
|
||
|
|
ext: opts.ext,
|
||
|
|
app: opts.app,
|
||
|
|
dlg: opts.dlg
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!artifacts.hash && (opts.payload || opts.payload === '')) {
|
||
|
|
artifacts.hash = calculatePayloadHash(opts.payload, credentials.algorithm, opts.contentType)
|
||
|
|
}
|
||
|
|
|
||
|
|
var mac = exports.calculateMac(credentials, artifacts)
|
||
|
|
|
||
|
|
var hasExt = artifacts.ext !== null && artifacts.ext !== undefined && artifacts.ext !== ''
|
||
|
|
var header = 'Hawk id="' + credentials.id +
|
||
|
|
'", ts="' + artifacts.ts +
|
||
|
|
'", nonce="' + artifacts.nonce +
|
||
|
|
(artifacts.hash ? '", hash="' + artifacts.hash : '') +
|
||
|
|
(hasExt ? '", ext="' + artifacts.ext.replace(/\\/g, '\\\\').replace(/"/g, '\\"') : '') +
|
||
|
|
'", mac="' + mac + '"'
|
||
|
|
|
||
|
|
if (artifacts.app) {
|
||
|
|
header = header + ', app="' + artifacts.app + (artifacts.dlg ? '", dlg="' + artifacts.dlg : '') + '"'
|
||
|
|
}
|
||
|
|
|
||
|
|
return header
|
||
|
|
}
|