feat(authentication): use jwt-decode to decode token

config.js

@@ -19,6 +19,7 @@ System.config({
     "aurelia-router": "npm:aurelia-router@1.0.0-beta.1.2.3",
     "extend": "npm:extend@3.0.0",
     "fetch": "github:github/fetch@0.11.1",
+    "jwt-decode": "npm:jwt-decode@2.0.1",
     "npm:aurelia-api@3.0.0-rc2": {
       "aurelia-dependency-injection": "npm:aurelia-dependency-injection@1.0.0-beta.1.2.3",
       "aurelia-fetch-client": "npm:aurelia-fetch-client@1.0.0-beta.1.2.5",
@@ -52,6 +53,10 @@ System.config({
       "aurelia-logging": "npm:aurelia-logging@1.0.0-beta.1.2.1",
       "aurelia-path": "npm:aurelia-path@1.0.0-beta.1.2.2",
       "aurelia-route-recognizer": "npm:aurelia-route-recognizer@1.0.0-beta.1.2.1"
+    },
+    "npm:jwt-decode@2.0.1": {
+      "fs": "github:jspm/nodelibs-fs@0.1.2",
+      "systemjs-json": "github:systemjs/plugin-json@0.1.2"
     }
   }
 });

package.json

@@ -38,7 +38,8 @@
       "aurelia-pal": "^1.0.0-beta.1.2.2",
       "aurelia-path": "^1.0.0-beta.1.2.2",
       "aurelia-router": "^1.0.0-beta.1.2.3",
-      "extend": "^3.0.0"
+      "extend": "^3.0.0",
+      "jwt-decode": "^2.0.1"
     },
     "peerDependencies": {
       "aurelia-api": "^3.0.0-rc2",
@@ -49,7 +50,8 @@
       "aurelia-pal": "^1.0.0-beta.1.2.2",
       "aurelia-path": "^1.0.0-beta.1.2.2",
       "aurelia-router": "^1.0.0-beta.1.2.3",
-      "extend": "^3.0.0"
+      "extend": "^3.0.0",
+      "jwt-decode": "^2.0.1"
     },
     "devDependencies": {
       "aurelia-pal-browser": "^1.0.0-beta.2.0.1",
@@ -66,7 +68,8 @@
     "aurelia-pal": "^1.0.0-beta.1.2.2",
     "aurelia-path": "^1.0.0-beta.1.2.2",
     "aurelia-router": "^1.0.0-beta.1.2.3",
-    "extend": "^3.0.0"
+    "extend": "^3.0.0",
+    "jwt-decode": "^2.0.1"
   },
   "devDependencies": {
     "aurelia-tools": "^0.1.20",

src/authentication.js

@@ -1,6 +1,7 @@
 import {PLATFORM} from 'aurelia-pal';
 import {inject} from 'aurelia-dependency-injection';
 import {deprecated} from 'aurelia-metadata';
+import jwtDecode from 'jwt-decode';
 import * as LogManager from 'aurelia-logging';
 
 import {BaseConfig}  from './baseConfig';
@@ -146,19 +147,13 @@ export class Authentication {
       }
     }
 
-    let payload = null;
+    this.payload = null;
 
-    if (this.accessToken && this.accessToken.split('.').length === 3) {
-      try {
-        const base64 = this.accessToken.split('.')[1].replace(/-/g, '+').replace(/_/g, '/');
-        payload = JSON.parse(decodeURIComponent(escape(atob(base64))));
-      } catch (e) {
-        payload = null;
-      }
-    }
+    try {
+      this.payload = this.accessToken ? jwtDecode(this.accessToken) : null;
+    } catch (_) {}
 
-    this.payload = payload;
-    this.exp = payload ? parseInt(payload.exp, 10) : NaN;
+    this.exp = this.payload ? parseInt(this.payload.exp, 10) : NaN;
 
     this.hasDataStored = true;