garrytan/gstack · error · CookieImportError

keychain_error

keychain_error

Error message

Cannot read Local State for ${browser.name} at ${localStatePath}${reason}

What it means

Error "Cannot read Local State for ${browser.name} at ${localStatePath}${reason}" thrown in garrytan/gstack.

Source

Thrown at browse/src/cookie-import-browser.ts:498

  return keys;
}

async function getWindowsAesKey(browser: BrowserInfo): Promise<Buffer> {
  const cacheKey = `win32:${browser.keychainService}`;
  const cached = keyCache.get(cacheKey);
  if (cached) return cached;

  const platform = 'win32' as const;
  const dataDir = getDataDirForPlatform(browser, platform);
  if (!dataDir) throw new CookieImportError(`No Windows data dir for ${browser.name}`, 'not_installed');

  const localStatePath = path.join(getBaseDir(platform), dataDir, 'Local State');
  let localState: any;
  try {
    localState = JSON.parse(fs.readFileSync(localStatePath, 'utf-8'));
  } catch (err) {
    const reason = err instanceof Error ? `: ${err.message}` : '';
    throw new CookieImportError(
      `Cannot read Local State for ${browser.name} at ${localStatePath}${reason}`,
      'keychain_error',
    );
  }

  const encryptedKeyB64: string = localState?.os_crypt?.encrypted_key;
  if (!encryptedKeyB64) {
    throw new CookieImportError(
      `No encrypted key in Local State for ${browser.name}`,
      'keychain_not_found',
    );
  }

  // The stored value is base64(b"DPAPI" + dpapi_encrypted_bytes) — strip the 5-byte prefix
  const encryptedKey = Buffer.from(encryptedKeyB64, 'base64').slice(5);
  const key = await dpapiDecrypt(encryptedKey);
  keyCache.set(cacheKey, key);
  return key;

View on GitHub (pinned to 94993f7401)

When it happens

Trigger: Thrown at browse/src/cookie-import-browser.ts:498 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of garrytan/gstack@94993f7401 (2026-08-12). Data as JSON: /api/errors/937c8986cb85b0b6. Report an issue: GitHub.