ecdsa

ecdsa.erl

{Pub,Priv} = crypto:generate_key(ecdh,secp256r1),
 Msg = crypto:rand_bytes(5100),
 Sig = crypto:sign(ecdsa,sha256,Msg,[Priv,secp256r1]),
 byte_size(Sig).

ecdsa.py

# need ecdsa lib,
# pip install ecdsa
import os
from hashlib import sha256
from ecdsa import SigningKey,NIST256p
sign_key = SigningKey.generate(curve=NIST256p, hashfunc=sha256)
data_string = os.urandom(5100)
sig = sign_key.sign(data_string, hashfunc=sha256)
print(len(sig))