I am using the library signxml to sign XML signatures for SAML authentication. One of our implementer partners requires that we send the signature in SHA1. The base configuration of XMLSigner does not support SHA1 because it has been deprecated because SHA1 is not secure. Unfortunately I still have to send it as SHA1 because the other implementer won’t change their code base. I have read the library documentation and unsure how to force SHA1 support. If you call this code below, it errors out at this point in the code: https://github.com/XML-Security/signxml/blob/9f06f4314f1a0480e22992bbb8209a71bc581e05/signxml/signer.py#L120