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#!/usr/bin/env python
"""Unit tests for M2Crypto.EC, ECDSA part.
Copyright (c) 2000 Ng Pheng Siong. All rights reserved.
Portions copyright (c) 2005-2006 Vrije Universiteit Amsterdam. All
rights reserved.
"""
import hashlib
import logging
import os
import os.path
from M2Crypto import EC, Rand
from tests import unittest
from tests.test_ec_curves import tested_curve
log = logging.getLogger(__name__)
class ECDSATestCase(unittest.TestCase):
errkey = "tests/rsa.priv.pem"
privkey = "tests/ec.priv.pem"
pubkey = "tests/ec.pub.pem"
data = hashlib.sha256(b"Can you spell subliminal channel?").digest()
def setUp(self):
assert os.path.exists(self.errkey) and os.access(
self.errkey, os.R_OK
), "Cannot access errkey file {}".format(self.errkey)
assert os.path.exists(self.privkey) and os.access(
self.privkey, os.R_OK
), "Cannot access privkey file {}".format(self.privkey)
assert os.path.exists(self.pubkey) and os.access(
self.pubkey, os.R_OK
), "Cannot access pubkey file {}".format(self.pubkey)
def callback(self, *args):
pass
def callback2(self):
pass
def test_loadkey_junk(self):
with self.assertRaises(IOError):
EC.load_key(self.errkey)
def test_loadkey(self):
ec = EC.load_key(self.privkey)
self.assertEqual(len(ec), tested_curve[1])
def test_loadpubkey(self):
# XXX more work needed
ec = EC.load_pub_key(self.pubkey)
self.assertEqual(len(ec), tested_curve[1])
with self.assertRaises(EC.ECError):
EC.load_pub_key(self.errkey)
def _test_sign_dsa(self):
ec = EC.gen_params(tested_curve[0])
# ec.gen_key()
with self.assertRaises(EC.ECError):
ec.sign_dsa(self.data)
ec = EC.load_key(self.privkey)
r, s = ec.sign_dsa(self.data)
assert ec.verify_dsa(self.data, r, s)
assert not ec.verify_dsa(self.data, s, r)
def test_sign_dsa_asn1(self):
ec = EC.load_key(self.privkey)
blob = ec.sign_dsa_asn1(self.data)
assert ec.verify_dsa_asn1(self.data, blob)
with self.assertRaises(EC.ECError):
ec.verify_dsa_asn1(blob, self.data)
def test_verify_dsa(self):
ec = EC.load_key(self.privkey)
r, s = ec.sign_dsa(self.data)
ec2 = EC.load_pub_key(self.pubkey)
assert ec2.verify_dsa(self.data, r, s)
assert not ec2.verify_dsa(self.data, s, r)
def test_genparam(self):
ec = EC.gen_params(tested_curve[0])
self.assertEqual(len(ec), tested_curve[1])
def test_pub_key_from_params(self):
curve = EC.NID_prime256v1
ec = EC.gen_params(curve)
ec.gen_key()
ec_pub = ec.pub()
k = ec_pub.get_key()
ec2 = EC.pub_key_from_params(curve, k)
assert ec2.check_key()
r, s = ec.sign_dsa(self.data)
assert ec2.verify_dsa(self.data, r, s)
def suite():
return unittest.TestLoader().loadTestsFromTestCase(ECDSATestCase)
if __name__ == "__main__":
Rand.load_file("randpool.dat", -1)
unittest.TextTestRunner().run(suite())
Rand.save_file("randpool.dat")
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