def sign(privkey, data):
if not ecdsa:
raise custom_exceptions.SigningNotAvailableException("ecdsa not installed")
hash = hashlib.sha256(data).digest()
signature = privkey.sign_digest(hash, sigencode=ecdsa.util.sigencode_der)
return base64.b64encode(signature)
def generate_keypair():
if not ecdsa:
raise custom_exceptions.SigningNotAvailableException("ecdsa not installed")
private_key = ecdsa.SigningKey.generate(curve=SECP256k1)
public_key = private_key.get_verifying_key()
return (private_key, public_key)
def verify(pubkey, signature, data):
if not ecdsa:
raise custom_exceptions.SigningNotAvailableException("ecdsa not installed")
hash = hashlib.sha256(data).digest()
sign = base64.b64decode(signature)
try:
return pubkey.verify_digest(sign, hash, sigdecode=ecdsa.util.sigdecode_der)
except:
return False