adds static getters for Client.Stream & Client.Signature

client/index.js

@@ -1,7 +1,8 @@
 'use strict';
 
 const Swagger = require('swagger-client-promises'),
-      Stream = require('./lib/stream');
+      Stream = require('./lib/stream'),
+      Signature = require('./lib/signature');
 
 class Client {
 
@@ -61,6 +62,14 @@ class Client {
 
   }
 
+  static get Signature() {
+    return Signature;
+  }
+
+  static get Stream() {
+    return Stream;
+  }
+
 }
 
 exports = module.exports = Client;

client/lib/signature.js

@@ -0,0 +1,99 @@
+'use strict';
+
+const crypto = require('crypto'),
+      url = require('url');
+
+class Signature {
+
+  constructor(options) {
+
+    this.username = false;
+    this.key = false;
+    this.host = false;
+    this.method = 'GET';
+    this.params = false;
+    this.path = false;
+    this.parsed = false;
+
+    Object.assign(this, options || {});
+
+    if(! this.username)
+      throw new Error('Username is required');
+
+    if(! this.key)
+      throw new Error('AIO Key is required');
+
+    if(! this.path)
+      throw new Error('path is required');
+
+  }
+
+  toString() {
+
+    const step1 = this.hmac(this.key, this.date()),
+          step2 = this.hmac(step1, this.host),
+          step3 = this.hmac(step2, this.method),
+          step4 = this.hmac(step3, this.params);
+
+    const signing_key = this.hmac(step4, this.version),
+          canonical_request = this.hash(this.request),
+          to_sign = `${this.algorithm}\n${this.date}\n${canonical_request}`;
+
+    return this.hmac(signing_key, to_sign);
+
+  }
+
+  get request() {
+
+    return `${this.method}\n${this.path}?${this.params}
+            host: ${this.host}
+            x-aio-date: ${this.date}`;
+
+  }
+
+  get version() {
+    return 'aio-signature-v1';
+  }
+
+  get credential() {
+    return `${this.username}/${this.version}`;
+  }
+
+  get date() {
+    return (new Date()).toISOString();
+  }
+
+  get algorithm() {
+    return 'sha512';
+  }
+
+  get algorithmName() {
+    return `aio-hmac-${this.algorithm()}`;
+  }
+
+  get path() {
+    return this.path;
+  }
+
+  set path(path) {
+
+    this.parsed = url.parse(path, true);
+    this.params = Object.keys(this.parsed.query).sort().map(q => q.toLowerCase()).join('&');
+    this.host = this.parsed.host;
+    this.path = this.parsed.href.split('?')[0];
+
+  }
+
+  hash(data) {
+    const hash = crypto.createHash(this.algorithm());
+    return hmac.update(data).digest('hex');
+  }
+
+  hmac(key, data) {
+    const hmac = crypto.createHmac(this.algorithm(), key);
+    return hmac.update(data).digest('hex');
+  }
+
+}
+
+exports = module.exports = Signature;

gulpfile.js

@@ -1,24 +1,16 @@
 'use strict';
 
 const gulp = require('gulp'),
-      jshint = require('gulp-jshint');
+      eslint = require('gulp-eslint');
 
 gulp.task('lint', function() {
 
-  const lint = jshint({
-    "esnext": true,
-    "curly": false,
-    "eqeqeq": true,
-    "immed": true,
-    "newcap": false,
-    "noarg": true,
-    "sub": true,
-    "unused": "var",
-    "boss": true,
-    "eqnull": true,
-    "node": true,
-    "-W086": true
-  });
+  const config = {
+    ecmaFeatures: {
+      templateStrings: true
+    },
+    env: ['node', 'es6']
+  };
 
   return gulp.src([
     'index.js',
@@ -28,7 +20,7 @@ gulp.task('lint', function() {
     'server/lib/*.js',
     'tunnel/index.js',
     'tunnel/lib/*.js'
-  ]).pipe(lint).pipe(jshint.reporter('jshint-stylish'));
+  ]).pipe(eslint(config)).pipe(eslint.format()).pipe(eslint.failAfterError());
 
 });
 

package.json

@@ -19,9 +19,8 @@
   "homepage": "https://github.com/adafruit/adafruit-io-node#readme",
   "devDependencies": {
     "gulp": "^3.9.0",
-    "gulp-jshint": "^1.11.2",
-    "gulp-mocha": "^2.1.3",
-    "jshint-stylish": "^2.0.1"
+    "gulp-eslint": "^1.0.0",
+    "gulp-mocha": "^2.1.3"
   },
   "keywords": [
     "adafruit",