Return a list of :class:`asn1crypto.x509.Certificate` which are found
        in the META-INF folder (v1 signing).
        Note that we simply extract all certificates regardless of the signer.
        Therefore this is just a list of all certificates found in all signers.

def get_certificates_v1(self):
        """
        Return a list of :class:`asn1crypto.x509.Certificate` which are found
        in the META-INF folder (v1 signing).
        Note that we simply extract all certificates regardless of the signer.
        Therefore this is just a list of all certificates found in all signers.
        """
        certs = []
        for x in self.get_signature_names():
            certs.append(x509.Certificate.load(self.get_certificate_der(x)))

        return certs