3 files changed, 169 insertions, 0 deletions
diff --git a/webext/chrome/background.js b/webext/chrome/background.js
new file mode 100644
index 0000000..faa201f
--- /dev/null
+++ b/webext/chrome/background.js
@@ -0,0 +1,83 @@
+// Background service worker for Cerberus Chrome/Edge extension (MV3)
+
+function connectNative() {
+  try {
+    return chrome.runtime.connectNative('com.cerberus.pm');
+  } catch (e) {
+    console.error('Native host connection failed', e);
+    return null;
+  }
+}
+
+function nativeRequest(payload) {
+  return new Promise((resolve, reject) => {
+    const port = connectNative();
+    if (!port) {
+      reject(new Error('no_native_host'));
+      return;
+    }
+    const onMessage = (resp) => {
+      port.onMessage.removeListener(onMessage);
+      try { port.disconnect(); } catch {}
+      resolve(resp);
+    };
+    const onDisconnect = () => {
+      port.onMessage.removeListener(onMessage);
+      reject(new Error('disconnected'));
+    };
+    port.onMessage.addListener(onMessage);
+    port.onDisconnect.addListener(onDisconnect);
+    port.postMessage(payload);
+  });
+}
+
+async function getActiveTab() {
+  const tabs = await chrome.tabs.query({ active: true, currentWindow: true });
+  return tabs[0];
+}
+
+async function getOriginForActiveTab() {
+  const tab = await getActiveTab();
+  try {
+    const url = new URL(tab.url);
+    return url.origin;
+  } catch (e) {
+    return tab.url;
+  }
+}
+
+chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
+  (async () => {
+    if (!message || !message.type) return;
+    if (message.type === 'GET_PAGE_FORMS') {
+      const tab = await getActiveTab();
+      chrome.tabs.sendMessage(tab.id, { type: 'SCAN_FORMS' }, sendResponse);
+      return true;
+    }
+    if (message.type === 'FILL_CREDENTIALS') {
+      const tab = await getActiveTab();
+      chrome.tabs.sendMessage(tab.id, { type: 'FILL_CREDENTIALS', payload: message.payload }, sendResponse);
+      return true;
+    }
+    if (message.type === 'GET_CREDENTIALS_FOR_TAB') {
+      const origin = await getOriginForActiveTab();
+      try {
+        const resp = await nativeRequest({ type: 'get_for_origin', origin, include_password: true });
+        sendResponse(resp);
+      } catch (e) {
+        sendResponse({ ok: false, error: String(e) });
+      }
+      return true;
+    }
+    if (message.type === 'PING_NATIVE') {
+      try {
+        const resp = await nativeRequest({ type: 'ping' });
+        sendResponse(resp);
+      } catch (e) {
+        sendResponse({ ok: false, error: String(e) });
+      }
+      return true;
+    }
+  })();
+  return true; // keep channel open for async
+});
diff --git a/webext/chrome/manifest.json b/webext/chrome/manifest.json
new file mode 100644
index 0000000..977b83c
--- /dev/null
+++ b/webext/chrome/manifest.json
@@ -0,0 +1,30 @@
+{
+  "manifest_version": 3,
+  "name": "Cerberus Password Manager",
+  "version": "0.1.0",
+  "description": "Auto-fill and manage passwords with Cerberus.",
+  "permissions": [
+    "activeTab",
+    "storage",
+    "tabs",
+    "scripting",
+    "nativeMessaging"
+  ],
+  "host_permissions": [
+    "<all_urls>"
+  ],
+  "action": {
+    "default_title": "Cerberus",
+    "default_popup": "popup.html"
+  },
+  "background": {
+    "service_worker": "background.js"
+  },
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["content.js"],
+      "run_at": "document_end"
+    }
+  ]
+}
diff --git a/webext/chrome/popup.html b/webext/chrome/popup.html
new file mode 100644
index 0000000..b3482ed
--- /dev/null
+++ b/webext/chrome/popup.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8" />
+  <title>Cerberus</title>
+  <style>
+    body { font-family: sans-serif; width: 280px; margin: 10px; }
+    button { width: 100%; padding: 8px; margin: 6px 0; }
+    input { width: 100%; padding: 6px; margin: 6px 0; }
+  </style>
+</head>
+<body>
+  <h3>Cerberus</h3>
+  <input id="username" placeholder="Username" />
+  <input id="password" placeholder="Password" type="password" />
+  <button id="fetch">Fetch from Vault</button>
+  <button id="fill">Fill on Page</button>
+  <div id="status" style="font-size: 12px; color: #666; margin-top: 6px;"></div>
+  <script>
+    async function getActiveTab() {
+      const tabs = await chrome.tabs.query({ active: true, currentWindow: true });
+      return tabs[0];
+    }
+    function sendToBackground(msg) {
+      return new Promise((resolve) => {
+        chrome.runtime.sendMessage(msg, resolve);
+      });
+    }
+    async function fill(username, password) {
+      await sendToBackground({ type: 'FILL_CREDENTIALS', payload: { username, password } });
+    }
+    document.getElementById('fill').addEventListener('click', async () => {
+      const username = document.getElementById('username').value;
+      const password = document.getElementById('password').value;
+      try {
+        await fill(username, password);
+        window.close();
+      } catch (e) { console.error(e); }
+    });
+    document.getElementById('fetch').addEventListener('click', async () => {
+      const status = document.getElementById('status');
+      status.textContent = 'Fetching credentials from vault...';
+      try {
+        const resp = await sendToBackground({ type: 'GET_CREDENTIALS_FOR_TAB' });
+        if (!resp || !resp.ok) { status.textContent = 'Failed to fetch (native host?)'; return; }
+        const results = resp.result || [];
+        if (results.length === 0) { status.textContent = 'No matching entries'; return; }
+        const { username, password } = results[0];
+        if (username) document.getElementById('username').value = username;
+        if (password) document.getElementById('password').value = password;
+        status.textContent = 'Fetched from vault';
+      } catch (e) { console.error(e); status.textContent = 'Error'; }
+    });
+  </script>
+</body>
+</html>