126 lines
3.5 KiB
JavaScript
Executable file
126 lines
3.5 KiB
JavaScript
Executable file
// Load modules
|
|
|
|
var Crypto = require('crypto');
|
|
var Url = require('url');
|
|
var Utils = require('./utils');
|
|
|
|
|
|
// Declare internals
|
|
|
|
var internals = {};
|
|
|
|
|
|
// MAC normalization format version
|
|
|
|
exports.headerVersion = '1'; // Prevent comparison of mac values generated with different normalized string formats
|
|
|
|
|
|
// Supported HMAC algorithms
|
|
|
|
exports.algorithms = ['sha1', 'sha256'];
|
|
|
|
|
|
// Calculate the request MAC
|
|
|
|
/*
|
|
type: 'header', // 'header', 'bewit', 'response'
|
|
credentials: {
|
|
key: 'aoijedoaijsdlaksjdl',
|
|
algorithm: 'sha256' // 'sha1', 'sha256'
|
|
},
|
|
options: {
|
|
method: 'GET',
|
|
resource: '/resource?a=1&b=2',
|
|
host: 'example.com',
|
|
port: 8080,
|
|
ts: 1357718381034,
|
|
nonce: 'd3d345f',
|
|
hash: 'U4MKKSmiVxk37JCCrAVIjV/OhB3y+NdwoCr6RShbVkE=',
|
|
ext: 'app-specific-data',
|
|
app: 'hf48hd83qwkj', // Application id (Oz)
|
|
dlg: 'd8djwekds9cj' // Delegated by application id (Oz), requires options.app
|
|
}
|
|
*/
|
|
|
|
exports.calculateMac = function (type, credentials, options) {
|
|
|
|
var normalized = exports.generateNormalizedString(type, options);
|
|
|
|
var hmac = Crypto.createHmac(credentials.algorithm, credentials.key).update(normalized);
|
|
var digest = hmac.digest('base64');
|
|
return digest;
|
|
};
|
|
|
|
|
|
exports.generateNormalizedString = function (type, options) {
|
|
|
|
var resource = options.resource || '';
|
|
if (resource &&
|
|
resource[0] !== '/') {
|
|
|
|
var url = Url.parse(resource, false);
|
|
resource = url.path; // Includes query
|
|
}
|
|
|
|
var normalized = 'hawk.' + exports.headerVersion + '.' + type + '\n' +
|
|
options.ts + '\n' +
|
|
options.nonce + '\n' +
|
|
(options.method || '').toUpperCase() + '\n' +
|
|
resource + '\n' +
|
|
options.host.toLowerCase() + '\n' +
|
|
options.port + '\n' +
|
|
(options.hash || '') + '\n';
|
|
|
|
if (options.ext) {
|
|
normalized += options.ext.replace('\\', '\\\\').replace('\n', '\\n');
|
|
}
|
|
|
|
normalized += '\n';
|
|
|
|
if (options.app) {
|
|
normalized += options.app + '\n' +
|
|
(options.dlg || '') + '\n';
|
|
}
|
|
|
|
return normalized;
|
|
};
|
|
|
|
|
|
exports.calculatePayloadHash = function (payload, algorithm, contentType) {
|
|
|
|
var hash = exports.initializePayloadHash(algorithm, contentType);
|
|
hash.update(payload || '');
|
|
return exports.finalizePayloadHash(hash);
|
|
};
|
|
|
|
|
|
exports.initializePayloadHash = function (algorithm, contentType) {
|
|
|
|
var hash = Crypto.createHash(algorithm);
|
|
hash.update('hawk.' + exports.headerVersion + '.payload\n');
|
|
hash.update(Utils.parseContentType(contentType) + '\n');
|
|
return hash;
|
|
};
|
|
|
|
|
|
exports.finalizePayloadHash = function (hash) {
|
|
|
|
hash.update('\n');
|
|
return hash.digest('base64');
|
|
};
|
|
|
|
|
|
exports.calculateTsMac = function (ts, credentials) {
|
|
|
|
var hmac = Crypto.createHmac(credentials.algorithm, credentials.key);
|
|
hmac.update('hawk.' + exports.headerVersion + '.ts\n' + ts + '\n');
|
|
return hmac.digest('base64');
|
|
};
|
|
|
|
|
|
exports.timestampMessage = function (credentials, localtimeOffsetMsec) {
|
|
|
|
var now = Utils.nowSecs(localtimeOffsetMsec);
|
|
var tsm = exports.calculateTsMac(now, credentials);
|
|
return { ts: now, tsm: tsm };
|
|
};
|