docs: def Verify(self, public_key):
      """Verifies the certificate using the given key.
  
      Args:
        public_key: The public key to use.
  
      Returns:
        True: Everything went well.
  
      Raises:
        VerificationError: The certificate did not verify.
      """
      # TODO(amoser): We have to do this manually for now since cryptography does
      # not yet support cert verification. There is PR 2460:
      # https://github.com/pyca/cryptography/pull/2460/files
      # that will add it, once it's in we should switch to using this.
  
      # Note that all times here are in UTC.
      now = rdfvalue.RDFDatetime.Now().AsDatetime()
      if now > self._value.not_valid_after:
        raise VerificationError("Certificate expired!")
      if now < self._value.not_valid_before:
        raise VerificationError("Certificate not yet valid!")
  
      public_key.Verify(
          self._value.tbs_certificate_bytes,
          self._value.signature,
          hash_algorithm=self._value.signature_hash_algorithm)
      return True