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import re
import unittest
from binascii import hexlify
from Crypto.Util.py3compat import bord
from Crypto.Hash import SHA256
from Crypto.PublicKey import ECC
from Crypto.SelfTest.st_common import list_test_cases
from Crypto.SelfTest.loader import load_test_vectors, load_test_vectors_wycheproof
from Crypto.Protocol.DH import key_agreement
class FIPS_ECDH_Tests_KAT(unittest.TestCase):
pass
test_vectors_verify = load_test_vectors(("Protocol", ),
"KAS_ECC_CDH_PrimitiveTest.txt",
"ECC CDH Primitive (SP800-56A Section 5.7.1.2)",
{
'qcavsx': lambda x: int(x, 16),
'qcavsy': lambda x: int(x, 16),
'diut': lambda x: int(x, 16),
'qiutx': lambda x: int(x, 16),
'qiuty': lambda x: int(x, 16),
}) or []
for idx, tv in enumerate(test_vectors_verify):
# Stand-alone header with curve name
if isinstance(tv, str):
res = re.match(r"\[([A-Za-z0-9-]+)\]", tv)
assert res
curve_name = res.group(1)
continue
public_key = ECC.construct(curve=curve_name,
point_x=tv.qcavsx,
point_y=tv.qcavsy)
private_key = ECC.construct(curve=curve_name,
d=tv.diut)
exp_response = tv.ziut
def ecdh_test(self,
public_key=public_key,
private_key=private_key,
exp_response=exp_response):
z = key_agreement(
static_pub=public_key,
static_priv=private_key,
kdf=lambda x: x)
self.assertEqual(z, exp_response)
def ecdh_test_rev(self,
public_key=public_key,
private_key=private_key,
exp_response=exp_response):
z = key_agreement(
static_pub=public_key,
static_priv=private_key,
kdf=lambda x: x)
self.assertEqual(z, exp_response)
setattr(FIPS_ECDH_Tests_KAT, "test_verify_positive_%d" % idx, ecdh_test)
if idx == 1:
setattr(FIPS_ECDH_Tests_KAT, "test_verify_positive_rev_%d" % idx, ecdh_test_rev)
class TestVectorsECDHWycheproof(unittest.TestCase):
desc = "Wycheproof ECDH tests"
def add_tests(self, filename):
def curve(g):
return g['curve']
def private(u):
return int(u['private'], 16)
result = load_test_vectors_wycheproof(("Protocol", "wycheproof"),
filename,
"Wycheproof ECDH (%s)"
% filename,
group_tag={'curve': curve},
unit_tag={'private': private},
)
self.tv += result
def setUp(self):
self.tv = []
self.desc = None
self.add_tests("ecdh_secp224r1_ecpoint_test.json")
self.add_tests("ecdh_secp256r1_ecpoint_test.json")
self.add_tests("ecdh_secp384r1_ecpoint_test.json")
self.add_tests("ecdh_secp521r1_ecpoint_test.json")
self.add_tests("ecdh_secp224r1_test.json")
self.add_tests("ecdh_secp256r1_test.json")
self.add_tests("ecdh_secp384r1_test.json")
self.add_tests("ecdh_secp521r1_test.json")
def shortDescription(self):
return self.desc
def test_verify(self, tv):
if len(tv.public) == 0:
return
try:
if bord(tv.public[0]) == 4: # SEC1
public_key = ECC.import_key(tv.public, curve_name=tv.curve)
else:
public_key = ECC.import_key(tv.public)
except ValueError:
assert tv.warning or not tv.valid
return
private_key = ECC.construct(curve=tv.curve, d=tv.private)
try:
z = key_agreement(static_pub=public_key,
static_priv=private_key,
kdf=lambda x: x)
except ValueError:
assert not tv.valid
except TypeError as e:
assert not tv.valid
assert "incompatible curve" in str(e)
else:
self.assertEqual(z, tv.shared)
assert tv.valid
def runTest(self):
for tv in self.tv:
self.desc = "Wycheproof ECDH Verify Test #%d (%s, %s)" % (tv.id, tv.comment, tv.filename)
self.test_verify(tv)
class ECDH_Tests(unittest.TestCase):
static_priv = ECC.import_key('-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg9VHFVKh2a1aVFifH\n+BiyNaRa2kttEg3165Ye/dJxJ7KhRANCAARImIEXro5ZOcyWU2mq/+d79FEZXtTA\nbKkz1aICQXihQdCMzRNbeNtC9LFLzhu1slRKJ2xsDAlw9r6w6vwtkRzr\n-----END PRIVATE KEY-----')
static_pub = ECC.import_key('-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgHhmv8zmZ+Nw8fsZd\ns8tlZflyfw2NE1CRS9DWr3Y3O46hRANCAAS3hZVUCbk+uk3w4S/YOraEVGG+WYpk\nNO/vrwzufUUks2GV2OnBQESe0EBk4Jq8gn4ij8Lvs3rZX2yT+XfeATYd\n-----END PRIVATE KEY-----').public_key()
eph_priv = ECC.import_key('-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgGPdJmFFFKzLPspIr\nE1T2cEjeIf4ajS9CpneP0e2b3AyhRANCAAQBexAA5BYDcXHs2KOksTYUsst4HhPt\nkp0zkgI2virc3OGJFNGPaCCPfFCQJHwLRaEpiq3SoQlgoBwSc8ZPsl3y\n-----END PRIVATE KEY-----')
eph_pub = ECC.import_key('-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQghaVZXElSEGEojFKF\nOU0JCpxWUWHvWQUR81gwWrOp76ShRANCAATi1Ib2K+YR3AckD8wxypWef7pw5PRw\ntBaB3RDPyE7IjHZC6yu1DbcXoCdtaw+F5DM+4zpl59n5ZaIy/Yl1BdIy\n-----END PRIVATE KEY-----')
def test_1(self):
# C(0, 2s)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
static_pub=self.static_pub,
static_priv=self.static_priv)
self.assertEqual(hexlify(z),
b"3960a1101d1193cbaffef4cc7202ebff783c22c6d2e0d5d530ffc66dc197ea9c")
def test_2(self):
# C(2e, 2s)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
static_pub=self.static_pub,
static_priv=self.static_priv,
eph_pub=self.eph_pub,
eph_priv=self.eph_priv)
self.assertEqual(hexlify(z),
b"7447b733d40c8fab2c633b3dc61e4a8c742f3a6af7e16fb0cc486f5bdb5d6ba2")
def test_3(self):
# C(1e, 2s)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
static_pub=self.static_pub,
static_priv=self.static_priv,
eph_priv=self.eph_priv)
self.assertEqual(hexlify(z),
b"9e977ae45f33bf67f285d064d83e6632bcafe3a7d33fe571233bab4794ace759")
def test_4(self):
# C(1e, 2s)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
static_pub=self.static_pub,
static_priv=self.static_priv,
eph_pub=self.eph_pub)
self.assertEqual(hexlify(z),
b"c9532df6aa7e9dbe5fe85da31ee25ff19c179c88691ec4b8328cc2036dcdadf2")
def test_5(self):
# C(2e, 1s) is not supported
kdf = lambda x: SHA256.new(x).digest()
self.assertRaises(ValueError,
key_agreement,
kdf=kdf,
static_priv=self.static_priv,
eph_pub=self.eph_pub,
eph_priv=self.eph_priv)
def test_6(self):
# C(2e, 1s) is not supported
kdf = lambda x: SHA256.new(x).digest()
self.assertRaises(ValueError,
key_agreement,
kdf=kdf,
static_pub=self.static_pub,
eph_pub=self.eph_pub,
eph_priv=self.eph_priv)
def test_7(self):
# C(2e, 0)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
eph_pub=self.eph_pub,
eph_priv=self.eph_priv)
self.assertEqual(hexlify(z),
b"feb257ebe063078b1391aac07913283d7b642ad7df61b46dfc9cd6f420bb896a")
def test_8(self):
# C(1e, 1s)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
static_priv=self.static_priv,
eph_pub=self.eph_pub)
self.assertEqual(hexlify(z),
b"ee4dc995117476ed57fd17ff0ed44e9f0466d46b929443bc0db9380317583b04")
def test_9(self):
# C(1e, 1s)
kdf = lambda x: SHA256.new(x).digest()
z = key_agreement(
kdf=kdf,
static_pub=self.static_pub,
eph_priv=self.eph_priv)
self.assertEqual(hexlify(z),
b"2351cc2014f7c40468fa072b5d30f706eeaeef7507311cd8e59bab3b43f03c51")
def test_10(self):
# No private (local) keys
kdf = lambda x: SHA256.new(x).digest()
self.assertRaises(ValueError,
key_agreement,
kdf=kdf,
static_pub=self.static_pub,
eph_pub=self.eph_pub)
def test_11(self):
# No public (peer) keys
kdf = lambda x: SHA256.new(x).digest()
self.assertRaises(ValueError,
key_agreement,
kdf=kdf,
static_priv=self.static_priv,
eph_priv=self.eph_priv)
def test_12(self):
# failure if kdf is missing
self.assertRaises(ValueError,
key_agreement,
static_pub=self.static_pub,
static_priv=self.static_priv)
def get_tests(config={}):
tests = []
tests += list_test_cases(FIPS_ECDH_Tests_KAT)
tests += [TestVectorsECDHWycheproof()]
tests += list_test_cases(ECDH_Tests)
slow_tests = config.get('slow_tests')
if slow_tests:
pass
return tests
if __name__ == '__main__':
def suite():
return unittest.TestSuite(get_tests())
unittest.main(defaultTest='suite')
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