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