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from copy import copy
from os.path import join
from unittest import TestCase
from click.testing import CliRunner
from pyecsca.ec.params import get_params
from pyecsca.ec.key_agreement import ECDH_SHA1
from pyecsca.ec.mult import LTRMultiplier, RTLMultiplier, CoronMultiplier, BinaryNAFMultiplier
from pyecsca.ec.signature import ECDSA_SHA1, SignatureResult
from pyecsca.codegen.builder import build_impl
from pyecsca.codegen.client import HostTarget
class ImplTests(TestCase):
def setUp(self):
self.secp128r1 = get_params("secg", "secp128r1", "projective")
self.base = self.secp128r1.generator
self.coords = self.secp128r1.curve.coordinate_model
self.curve25519 = get_params("other", "Curve25519", "xz")
self.base25519 = self.curve25519.generator
self.coords25519 = self.curve25519.curve.coordinate_model
def do_basic_test(self, callback, runner, params, mult_class, formulas, mult_name,
ecdsa, ecdh, **mult_kwargs):
other_args = [
("--mul", "KARATSUBA", "--sqr", "KARATSUBA"),
("--mul", "TOOM_COOK", "--sqr", "TOOM_COOK"),
("--red", "BARRETT"),
("--red", "MONTGOMERY")
]
for additional in other_args:
with runner.isolated_filesystem() as tmpdir:
runner.invoke(build_impl,
["--platform", "HOST",
*additional,
"--ecdsa" if ecdsa else "--no-ecdsa",
"--ecdh" if ecdh else "--no-ecdh",
params.curve.model.shortname, params.curve.coordinate_model.name,
*formulas,
f"{mult_name}({','.join(f'{key}={value}' for key, value in mult_kwargs.items())})",
"."])
target = HostTarget(params.curve.model, params.curve.coordinate_model,
binary=join(tmpdir, "pyecsca-codegen-HOST.elf"))
target.connect()
target.set_params(params)
formula_instances = [params.curve.coordinate_model.formulas[formula] for formula
in formulas]
mult = mult_class(*formula_instances, **mult_kwargs)
mult.init(params, params.generator)
callback(target, mult, params)
target.disconnect()
class PRNGTests(ImplTests):
def test_init(self):
runner = CliRunner()
def callback(target, mult, params):
target.init_prng(bytes([0x12, 0x34, 0x56, 0x78]))
self.do_basic_test(callback, runner, self.secp128r1, LTRMultiplier,
["add-1998-cmo", "dbl-1998-cmo"], "ltr", False, False, complete=False)
class SetupTests(ImplTests):
def test_setup(self):
runner = CliRunner()
def callback(target, mult, params):
priv = 57
pub = mult.multiply(priv).to_affine()
target.set_privkey(priv)
target.set_pubkey(pub)
self.do_basic_test(callback, runner, self.secp128r1, LTRMultiplier,
["add-1998-cmo", "dbl-1998-cmo"], "ltr", False, False, complete=False)
def test_debug(self):
runner = CliRunner()
def callback(target, mult, params):
model, coords = target.debug()
self.assertEqual(model, params.curve.model.shortname)
self.assertEqual(coords, params.curve.coordinate_model.name)
self.do_basic_test(callback, runner, self.secp128r1, LTRMultiplier,
["add-1998-cmo", "dbl-1998-cmo"], "ltr", False, False, complete=False)
class KeyGenerationTests(ImplTests):
def do_keygen_test(self, runner, params, mult_class, formulas, mult_name, **mult_kwargs):
def callback(target, mult, params):
for _ in range(10):
priv, pub = target.generate()
self.assertTrue(params.curve.is_on_curve(pub))
expected = mult.multiply(priv).to_affine()
self.assertEqual(pub, expected)
self.do_basic_test(callback, runner, params, mult_class, formulas, mult_name, False, False,
**mult_kwargs)
def test_ltr(self):
runner = CliRunner()
self.do_keygen_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False)
self.do_keygen_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True)
self.do_keygen_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", always=True, complete=False)
self.do_keygen_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", always=True, complete=True)
def test_rtl(self):
runner = CliRunner()
self.do_keygen_test(runner, self.secp128r1, RTLMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"rtl", always=False)
self.do_keygen_test(runner, self.secp128r1, RTLMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"rtl", always=True)
def test_coron(self):
runner = CliRunner()
self.do_keygen_test(runner, self.secp128r1, CoronMultiplier,
["add-1998-cmo", "dbl-1998-cmo"], "coron")
def test_bnaf(self):
runner = CliRunner()
self.do_keygen_test(runner, self.secp128r1, BinaryNAFMultiplier,
["add-1998-cmo", "dbl-1998-cmo", "neg"], "bnaf")
# def test_ladder(self):
# runner = CliRunner()
# self.do_keygen_test(runner, self.curve25519, LadderMultiplier, ["ladd-1987-m", "dbl-1987-m"], "ldr")
# # TODO: what about coords where generator is not affine?
class ScalarMultiplicationTests(ImplTests):
def do_mult_test(self, runner, params, mult_class, formulas, mult_name, **mult_kwargs):
values = [15, 2355498743, 3253857901321912443757746]
def callback(target, mult, params):
for value in values:
result = target.scalar_mult(value, params.generator)
expected = mult.multiply(value)
self.assertEqual(result, expected)
self.do_basic_test(callback, runner, params, mult_class, formulas, mult_name, False, False,
**mult_kwargs)
def test_ltr(self):
runner = CliRunner()
self.do_mult_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False)
self.do_mult_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True)
self.do_mult_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False, always=True)
self.do_mult_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True, always=True)
def test_rtl(self):
runner = CliRunner()
self.do_mult_test(runner, self.secp128r1, RTLMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"rtl", always=False)
self.do_mult_test(runner, self.secp128r1, RTLMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"rtl", always=True)
def test_coron(self):
runner = CliRunner()
self.do_mult_test(runner, self.secp128r1, CoronMultiplier,
["add-1998-cmo", "dbl-1998-cmo"], "coron")
def test_bnaf(self):
runner = CliRunner()
self.do_mult_test(runner, self.secp128r1, BinaryNAFMultiplier,
["add-1998-cmo", "dbl-1998-cmo", "neg"], "bnaf")
class ECDHTests(ImplTests):
def do_ecdh_test(self, runner, params, mult_class, formulas, mult_name, **mult_kwargs):
other_privs = [15, 2355498743, 3253857901321912443757746]
def callback(target, mult, params):
for other_priv in other_privs:
priv, pub = target.generate()
other_pub = mult.multiply(other_priv)
ecdh = ECDH_SHA1(copy(mult), params, other_pub, priv)
result = target.ecdh(other_pub)
expected = ecdh.perform()
self.assertEqual(result, expected)
self.do_basic_test(callback, runner, params, mult_class, formulas, mult_name, False, True,
**mult_kwargs)
def test_ltr(self):
runner = CliRunner()
self.do_ecdh_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False)
self.do_ecdh_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True)
self.do_ecdh_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False, always=True)
self.do_ecdh_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True, always=True)
def test_rtl(self):
runner = CliRunner()
self.do_ecdh_test(runner, self.secp128r1, RTLMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"rtl", always=False)
self.do_ecdh_test(runner, self.secp128r1, RTLMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"rtl", always=True)
def test_coron(self):
runner = CliRunner()
self.do_ecdh_test(runner, self.secp128r1, CoronMultiplier,
["add-1998-cmo", "dbl-1998-cmo"], "coron")
def test_bnaf(self):
runner = CliRunner()
self.do_ecdh_test(runner, self.secp128r1, BinaryNAFMultiplier,
["add-1998-cmo", "dbl-1998-cmo", "neg"], "bnaf")
class ECDSATests(ImplTests):
def do_ecdsa_test(self, runner, params, mult_class, formulas, mult_name, **mult_kwargs):
data = b"something"
def callback(target, mult, params):
priv, pub = target.generate()
ecdsa = ECDSA_SHA1(copy(mult), params, mult.formulas["add"],
pub.to_model(params.curve.coordinate_model, params.curve), priv)
signature_data = target.ecdsa_sign(data)
result = SignatureResult.from_DER(signature_data)
self.assertTrue(ecdsa.verify_data(result, data))
expected = ecdsa.sign_data(data).to_DER()
self.assertTrue(target.ecdsa_verify(data, expected))
self.do_basic_test(callback, runner, params, mult_class, formulas, mult_name, True,
False, **mult_kwargs)
def test_ltr(self):
runner = CliRunner()
self.do_ecdsa_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False)
self.do_ecdsa_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True)
self.do_ecdsa_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=False, always=True)
self.do_ecdsa_test(runner, self.secp128r1, LTRMultiplier, ["add-1998-cmo", "dbl-1998-cmo"],
"ltr", complete=True, always=True)
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