Saving now works over insecure networks.

public/emulator.js

@@ -51,6 +51,12 @@ class HomeplayEmulator {
     window.EJS_onLoadState = this.onEJSLoadState;
     window.onmessage = this.onMessage;
 
+    // Now check if we have the libs we NEED.
+    if(!window.JSZip || !window.CryptoJS) {
+      this.send({ message: 'error', error: 'Missing required libraries' });
+      return;
+    }
+
     // Begin the init interval
     this.initInterval = setInterval(() => {
       this.send({ message: 'iframe_loaded' });
@@ -66,7 +72,7 @@ class HomeplayEmulator {
           await this.save();
         }
       } catch(e) {
-        console.error('Error checking for save updates', e);
+        this.send({ message: 'error', error: e.message });
       } finally {
         this.saveLock = false;
       }
@@ -147,16 +153,22 @@ class HomeplayEmulator {
         break;
 
       default:
-        console.error('Website sent invalid message', data);
+        this.send({ message: 'error', error: 'Unknown message' });
+        break;
     }
   }
 
   getFileMD5 = async path => {
     const buffer = window.EJS_emulator.gameManager.FS.readFile(path);
-    const hash = await crypto.subtle.digest('SHA-256', buffer);
-    const hashArray = Array.from(new Uint8Array(hash));
-    const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
-    return hashHex;
+
+    // Convert buffer to string, likely going to need to change later.
+    const bufferArray = Array.from(new Uint8Array(buffer));
+    const bufferString = bufferArray.map(b => String.fromCharCode(b)).join('');
+
+    // Hash string
+    const hash = window.CryptoJS.MD5(bufferString);
+    const hashString = hash.toString(CryptoJS.enc.Base64);
+    return hashString;
   }
 
   getRetroArchCfg = (gameManager) => {