Decrypt Chrome Linux BLOB encrypted cookies in Python

Question

I have Chrome 33+ in Ubuntu and I see that the cookies are encrypted in a BLOB structure:

CREATE TABLE cookies (creation_utc INTEGER NOT NULL UNIQUE PRIMARY KE

Answer 1

The comments are a bit confusing so just to clarify, this is the chromium source in os_crypt_win.cc so you can see it's just putting the string into a blob and running CryptUnprotectData()

bool OSCrypt::DecryptString(const std::string& ciphertext,
                            std::string* plaintext) {
  DATA_BLOB input;
  input.pbData = const_cast(
      reinterpret_cast(ciphertext.data()));
  input.cbData = static_cast(ciphertext.length());

  DATA_BLOB output;
  BOOL result = CryptUnprotectData(&input, NULL, NULL, NULL, NULL,
                                   0, &output);
  if (!result)
    return false;

  plaintext->assign(reinterpret_cast(output.pbData), output.cbData);
  LocalFree(output.pbData);
  return true;
}