asonnino/bls

A simple Python implementation of threshold BLS signatures.

bls's Issues

Any document or guidance for new one to use your BLS lib?

I'm not a crypto guys, but I'm intereted in the propoerties of BLS for group threhold signing. I would like to build some application based on existing lib or tools on GitHub. Can you give me some suggestions how to use your code or any document of this repo?

Error: 'key_gen' undefined

hash function not compatible with python3

I hack the code like this:

def hash(elements):
""" generates a Bn hash by hashing a number of EC points """
""" Cstring = b",".join([str(x) for x in elements]) # not compatible with python3 """
Cstring = ",".join([str(x) for x in elements]).encode() # compatible now
return sha256(Cstring).digest()

lagrange_basis functions throws an error

Lagrange Basis function throws an Attribute Error at the line

return (numerator * denominator.mod_inverse(o)) % o

Specifically:
AttributeError: 'int' object has no attribute 'mod_inverse'

Attempts to solve this by forcing denominator to a Bn cause further errors.