102 lines
3.3 KiB
Python
102 lines
3.3 KiB
Python
import json
|
|
from pathlib import Path
|
|
|
|
import pytest
|
|
from pyaegis import aegis128l, aegis128x2, aegis128x4, aegis256, aegis256x2, aegis256x4
|
|
|
|
from .util import random_split_bytes
|
|
|
|
|
|
def load_mac_test_vectors():
|
|
"""Load MAC test vectors from JSON file."""
|
|
test_vectors_path = (
|
|
Path(__file__).parent / "test-vectors" / "aegismac-test-vectors.json"
|
|
)
|
|
with open(test_vectors_path, "r") as f:
|
|
return json.load(f)
|
|
|
|
|
|
def get_algorithm_module(name):
|
|
"""Map test vector name to algorithm module."""
|
|
if "128L" in name:
|
|
return aegis128l
|
|
elif "128X2" in name:
|
|
return aegis128x2
|
|
elif "128X4" in name:
|
|
return aegis128x4
|
|
elif "256" in name and "256X2" not in name and "256X4" not in name:
|
|
return aegis256
|
|
elif "256X2" in name:
|
|
return aegis256x2
|
|
elif "256X4" in name:
|
|
return aegis256x4
|
|
else:
|
|
raise ValueError(f"Unknown algorithm in test vector name: {name}")
|
|
|
|
|
|
def get_test_id(vector):
|
|
"""Generate a test ID from the vector name."""
|
|
name = vector["name"]
|
|
# Extract algorithm name, e.g., "AEGISMAC-128L Test Vector" -> "128L"
|
|
if "AEGISMAC-" in name:
|
|
return name.split("AEGISMAC-")[1].split(" ")[0]
|
|
return name
|
|
|
|
|
|
@pytest.mark.parametrize("vector", load_mac_test_vectors(), ids=get_test_id)
|
|
def test_mac(vector):
|
|
"""Test MAC computation against test vectors."""
|
|
alg = get_algorithm_module(vector["name"])
|
|
|
|
key = bytes.fromhex(vector["key"])
|
|
nonce = bytes.fromhex(vector["nonce"])
|
|
data = bytes.fromhex(vector["data"])
|
|
|
|
# Test 128-bit MAC if present
|
|
if "tag128" in vector:
|
|
expected_tag128 = bytes.fromhex(vector["tag128"])
|
|
computed_tag128 = alg.mac(key, nonce, data, maclen=16)
|
|
assert computed_tag128 == expected_tag128, (
|
|
f"128-bit MAC mismatch for {vector['name']}"
|
|
)
|
|
|
|
# Test 256-bit MAC if present
|
|
if "tag256" in vector:
|
|
expected_tag256 = bytes.fromhex(vector["tag256"])
|
|
computed_tag256 = alg.mac(key, nonce, data, maclen=32)
|
|
assert computed_tag256 == expected_tag256, (
|
|
f"256-bit MAC mismatch for {vector['name']}"
|
|
)
|
|
|
|
|
|
@pytest.mark.parametrize("vector", load_mac_test_vectors(), ids=get_test_id)
|
|
def test_mac_class(vector):
|
|
"""Test MAC computation using the Mac class against test vectors."""
|
|
alg = get_algorithm_module(vector["name"])
|
|
|
|
key = bytes.fromhex(vector["key"])
|
|
nonce = bytes.fromhex(vector["nonce"])
|
|
data = bytes.fromhex(vector["data"])
|
|
|
|
# Test 128-bit MAC if present
|
|
if "tag128" in vector:
|
|
expected_tag128 = bytes.fromhex(vector["tag128"])
|
|
mac_state = alg.Mac(key, nonce)
|
|
for chunk in random_split_bytes(data):
|
|
mac_state.update(chunk)
|
|
computed_tag128 = mac_state.final(maclen=16)
|
|
assert computed_tag128 == expected_tag128, (
|
|
f"128-bit MAC mismatch for {vector['name']}"
|
|
)
|
|
|
|
# Test 256-bit MAC if present
|
|
if "tag256" in vector:
|
|
expected_tag256 = bytes.fromhex(vector["tag256"])
|
|
mac_state = alg.Mac(key, nonce)
|
|
for chunk in random_split_bytes(data):
|
|
mac_state.update(chunk)
|
|
computed_tag256 = mac_state.final(maclen=32)
|
|
assert computed_tag256 == expected_tag256, (
|
|
f"256-bit MAC mismatch for {vector['name']}"
|
|
)
|