code: def Verify(self, public_key):
      
      if self.digest_type != self.HashType.SHA256:
        raise rdfvalue.DecodeError("Unsupported digest.")
      if self.signature_type not in [
          self.SignatureType.RSA_PKCS1v15, self.SignatureType.RSA_PSS
      ]:
        raise rdfvalue.DecodeError("Unsupported signature type.")
  
      try:
        public_key.Verify(self.data, self.signature)
      except InvalidSignature as e:
        raise rdfvalue.DecodeError("Could not verify blob. Error: %s" % e)
  
      return True
docs: Verify the data in this blob.
  
      Args:
        public_key: The public key to use for verification.
  
      Returns:
        True when verification succeeds.
  
      Raises:
        rdfvalue.DecodeError if the data is not suitable verified.