def run(curve, tag):
sk, pk = generate_keypair(curve)
msg = "My message to sign"
# Signature
start = time.time()
sig = sign(curve, sk, msg)
sign_time = time.time() - start
# For signature verification there is no meaning of using infective
# computations in scalar multiplications.
if curve.infective:
pk.curve = wcurve.secp256r1_curve()
# Verification
start = time.time()
# /!\ in a real implementation the public key would most likely come
# from an untrusted remote party so it would then be required to check
# the validity of the public key before calling this function. That is
# instantiating the right curve, calling JacobianPoint.from_affine()
# or JacobianPoint.uncompress(), and calling JacobianPoint.is_valid().
valid = verify(pk, sig, msg)
verify_time = time.time() - start
print('%-25s: sign=%0.3fs verify=%0.3fs valid=%s' % \
(tag, sign_time, verify_time, valid))
def setUp(self):
self.cwd = os.path.dirname(os.path.abspath(__file__))
self.curve_name = 'prime256v1'
self.curve = wcurve.secp256r1_curve()
self.curve_infective = wcurve.secp256r1_curve_infective()
self.bin = 'ec_ref'
self.bin_path = os.path.join(self.cwd, self.bin)
def run(curve, tag):
sk, pk = generate_keypair(curve)
msg = "My message to sign"
# Signature
start = time.time()
sig = sign(curve, sk, msg)
sign_time = time.time() - start
# For signature verification there is no meaning of using infective
# computations in scalar multiplications.
if curve.infective:
pk.curve = wcurve.secp256r1_curve()
# Verification
start = time.time()
# /!\ in a real implementation the public key would most likely come
# from an untrusted remote party so it would then be required to check
# the validity of the public key before calling this function. That is
# instantiating the right curve, calling JacobianPoint.from_affine()
# or JacobianPoint.uncompress(), and calling JacobianPoint.is_valid().
valid = verify(pk, sig, msg)
verify_time = time.time() - start
print('%-25s: sign=%0.3fs verify=%0.3fs valid=%s' % \
(tag, sign_time, verify_time, valid))
def testEq(self):
self.assertEqual(self.curve.base_point, self.curve.base_point)
self.assertEqual(self.curve.point_at_infinity, self.curve.point_at_infinity)
self.assertEqual(self.curve.point_at_infinity, -self.curve.point_at_infinity)
self.assertFalse(self.curve.base_point == self.curve.point_at_infinity)
self.assertTrue(self.curve.base_point != self.curve.point_at_infinity)
curve2 = wcurve.secp256r1_curve()
self.assertEqual(self.curve, self.curve)
self.assertEqual(self.curve, curve2)
self.assertEqual(self.curve.base_point, curve2.base_point)
curve2.n = 42
self.assertNotEqual(self.curve, curve2)
self.assertNotEqual(self.curve.base_point, curve2.base_point)
return secret_key * curve.base_point
def compute_sharedkey(secret_key, pub_key):
if not pub_key.is_valid():
return
return secret_key * pub_key
def run(curve, tag):
sk1 = generate_secretkey(curve)
sk2 = generate_secretkey(curve)
pk1 = compute_pubkey(curve, sk1)
start = time.time()
pk2 = compute_pubkey(curve, sk2)
pub_time = time.time() - start
sh1 = compute_sharedkey(sk1, pk2)
assert sh1 is not None
start = time.time()
sh2 = compute_sharedkey(sk2, pk1)
shared_time = time.time() - start
assert sh2 is not None
print('%-25s: pub_key=%0.3fs shared_key=%0.3fs equals=%s' % \
(tag, pub_time, shared_time, sh1 == sh2))
if __name__ == '__main__':
run(wcurve.secp256r1_curve(), 'secp256r1')
run(wcurve.secp256r1_curve_infective(),
'secp256r1_curve_infective')
