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test_ml_dsa.py
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import unittest
import os
import json
from dilithium_py.ml_dsa import ML_DSA_44, ML_DSA_65, ML_DSA_87
class TestMLDSA(unittest.TestCase):
"""
Test ML DSA for internal consistency by generating signatures
and verifying them!
"""
def generic_test_ml_dsa(self, ML_DSA, count=5):
for _ in range(count):
msg = b"Signed by ML_DSA" + os.urandom(16)
# Perform signature process
pk, sk = ML_DSA.keygen()
sig = ML_DSA.sign(sk, msg)
check_verify = ML_DSA.verify(pk, msg, sig)
# Generate some fail cases
pk_bad, _ = ML_DSA.keygen()
check_wrong_pk = ML_DSA.verify(pk_bad, msg, sig)
check_wrong_msg = ML_DSA.verify(pk, b"", sig)
# Check that signature works
self.assertTrue(check_verify)
# Check changing the key breaks verify
self.assertFalse(check_wrong_pk)
# Check changing the message breaks verify
self.assertFalse(check_wrong_msg)
def test_ml_dsa_44(self):
self.generic_test_ml_dsa(ML_DSA_44)
def test_ml_dsa_65(self):
self.generic_test_ml_dsa(ML_DSA_65)
def test_ml_dsa_87(self):
self.generic_test_ml_dsa(ML_DSA_87)
class TestMLDSADeterministic(unittest.TestCase):
"""
Test ML DSA for internal consistency by generating signatures
and verifying them!
"""
def generic_test_ml_dsa(self, ML_DSA, count=5):
for _ in range(count):
msg = b"Signed by ML_DSA" + os.urandom(16)
# Perform signature process
pk, sk = ML_DSA.keygen()
sig = ML_DSA.sign(sk, msg, deterministic=True)
check_verify = ML_DSA.verify(pk, msg, sig)
# Generate some fail cases
pk_bad, _ = ML_DSA.keygen()
check_wrong_pk = ML_DSA.verify(pk_bad, msg, sig)
check_wrong_msg = ML_DSA.verify(pk, b"", sig)
# Check that signature works
self.assertTrue(check_verify)
# Check changing the key breaks verify
self.assertFalse(check_wrong_pk)
# Check changing the message breaks verify
self.assertFalse(check_wrong_msg)
def test_ml_dsa_44(self):
self.generic_test_ml_dsa(ML_DSA_44)
def test_ml_dsa_65(self):
self.generic_test_ml_dsa(ML_DSA_65)
def test_ml_dsa_87(self):
self.generic_test_ml_dsa(ML_DSA_87)
class TestML_DSA_KAT(unittest.TestCase):
"""
Test ML-DSA against test vectors collected from
https://github.com/usnistgov/ACVP-Server/releases/tag/v1.1.0.35
"""
def generic_keygen_kat(self, ML_DSA, index):
with open("assets/ML-DSA-keyGen-FIPS204/internalProjection.json") as f:
data = json.load(f)
kat_data = data["testGroups"][index]["tests"]
for test in kat_data:
seed = bytes.fromhex(test["seed"])
pk_kat = bytes.fromhex(test["pk"])
sk_kat = bytes.fromhex(test["sk"])
pk, sk = ML_DSA._keygen_internal(seed)
self.assertEqual(pk, pk_kat)
self.assertEqual(sk, sk_kat)
def generic_sign_kat(self, ML_DSA, index, deterministic=False):
with open("assets/ML-DSA-sigGen-FIPS204/internalProjection.json") as f:
data = json.load(f)
if deterministic:
kat_data = data["testGroups"][2 * index]["tests"]
else:
kat_data = data["testGroups"][2 * index + 1]["tests"]
for test in kat_data:
sk_kat = bytes.fromhex(test["sk"])
msg_kat = bytes.fromhex(test["message"])
sig_kat = bytes.fromhex(test["signature"])
if deterministic:
rng_kat = bytes([0]) * 32
else:
rng_kat = bytes.fromhex(test["rng"])
sig = ML_DSA._sign_internal(sk_kat, msg_kat, rng_kat)
self.assertEqual(sig, sig_kat)
def generic_verify_kat(self, ML_DSA, index):
with open("assets/ML-DSA-sigVer-FIPS204/internalProjection.json") as f:
data = json.load(f)
pk_kat = bytes.fromhex(data["testGroups"][index]["pk"])
kat_data = data["testGroups"][index]["tests"]
for test in kat_data:
check_kat = test["testPassed"]
msg_kat = bytes.fromhex(test["message"])
sig_kat = bytes.fromhex(test["signature"])
check = ML_DSA._verify_internal(pk_kat, msg_kat, sig_kat)
self.assertEqual(check, check_kat)
def test_ML_DSA_44_keygen(self):
self.generic_keygen_kat(ML_DSA_44, 0)
def test_ML_DSA_65_keygen(self):
self.generic_keygen_kat(ML_DSA_65, 1)
def test_ML_DSA_87_keygen(self):
self.generic_keygen_kat(ML_DSA_87, 2)
def test_ML_DSA_44_sign(self):
self.generic_sign_kat(ML_DSA_44, 0, deterministic=True)
def test_ML_DSA_65_sign(self):
self.generic_sign_kat(ML_DSA_65, 1, deterministic=True)
def test_ML_DSA_87_sign(self):
self.generic_sign_kat(ML_DSA_87, 2, deterministic=True)
def test_ML_DSA_44_verify(self):
self.generic_verify_kat(ML_DSA_44, 0)
def test_ML_DSA_65_verify(self):
self.generic_verify_kat(ML_DSA_65, 1)
def test_ML_DSA_87_verify(self):
self.generic_verify_kat(ML_DSA_87, 2)