1 files changed, 89 insertions, 0 deletions
diff --git a/node_modules/request/lib/hawk.js b/node_modules/request/lib/hawk.js
new file mode 100644
index 0000000..de48a98
--- /dev/null
+++ b/node_modules/request/lib/hawk.js
@@ -0,0 +1,89 @@
+'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
+}