def sign(self, msg):
if self.hash_alg.digest_size * 8 > self.prepared_key.curve.key_size:
raise TypeError("this curve (%s) is too short "
"for your digest (%d)" % (self.prepared_key.curve.name,
8*self.hash_alg.digest_size))
signature = self.prepared_key.sign(msg, ec.ECDSA(self.hash_alg()))
order = (2 ** self.prepared_key.curve.key_size) - 1
return sigencode_string(*sigdecode_der(signature, order), order=order)
def sign(self, msg):
if self.hash_alg.digest_size * 8 > self.prepared_key.curve.key_size:
raise TypeError("this curve (%s) is too short "
"for your digest (%d)" % (self.prepared_key.curve.name,
8*self.hash_alg.digest_size))
signature = self.prepared_key.sign(msg, ec.ECDSA(self.hash_alg()))
order = (2 ** self.prepared_key.curve.key_size) - 1
return sigencode_string(*sigdecode_der(signature, order), order=order)
def ecdsa_verify(pk, sig, msg):
"""Verify ecdsa"""
r, s = sig
sigg = util.sigencode_string(r, s, order)
return pk.verify(sigg, msg)
def sig_der_to_string(sig, order):
r, s = sigdecode_der(sig, order)
return sigencode_string(r, s, order)