Schorr Signatures

This is a Schnorr signatures utility for educational purposes only.

There are four scripts:

• schnorr.py: is the BIP340 reference implementation minimally changed to perform a test from the test-vector.csv; see https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki and the reference implementation at https://github.com/bitcoin/bips/tree/master/bip-0340
• create_priv_key.py: asks for a sentence (no newline characters), SAH256-hashes it and creates a key pair which can be use to schnorr-sign and schnorr-verify a message.
• schnorr-sign.py: from a private key and a message, the scripts returns the signature and the public key; see python3 schnorr-sign.py -h for the syntax
• schnorr-verify.py: from a public key, a message and a signature, the script returns True or False; see python3 schnorr-verify.py -h for the syntax

Both the scripts schnorr-sign.py and schnorr-verify.py are taken from the reference implementation.

I created the create_priv_key.py, but should not be used in production environments because it is not secure enough.