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https://github.com/polhenarejos/pico-hsm.git
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81 lines
2.6 KiB
Python
81 lines
2.6 KiB
Python
"""
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/*
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* This file is part of the Pico HSM distribution (https://github.com/polhenarejos/pico-hsm).
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* Copyright (c) 2022 Pol Henarejos.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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"""
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import pytest
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import os
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.kdf.hkdf import HKDF
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from cryptography import exceptions
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from const import DEFAULT_DKEK_SHARES, DEFAULT_DKEK
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from utils import DOPrefixes
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INFO = b'info message'
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def test_prepare_kd(device):
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device.initialize(dkek_shares=DEFAULT_DKEK_SHARES)
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resp = device.import_dkek(DEFAULT_DKEK)
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resp = device.import_dkek(DEFAULT_DKEK)
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@pytest.mark.parametrize(
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"size", [128, 192, 256]
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)
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@pytest.mark.parametrize(
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"algo", [hashes.SHA256, hashes.SHA384, hashes.SHA512]
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)
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@pytest.mark.parametrize(
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"out_len", [32, 64, 256, 1024]
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)
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class TestHKDF:
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def test_hkdf_ok(self, device, size, algo, out_len):
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pkey = os.urandom(size // 8)
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keyid = device.import_key(pkey)
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salt = os.urandom(16)
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resA = device.hkdf(algo, keyid, INFO, salt, out_len=out_len)
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device.delete_file(DOPrefixes.KEY_PREFIX.value << 8 | keyid)
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hkdf = HKDF(
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algorithm=algo(),
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length=out_len,
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salt=salt,
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info=INFO,
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)
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resB = hkdf.derive(pkey)
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assert(bytes(resA) == resB)
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hkdf = HKDF(
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algorithm=algo(),
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length=out_len,
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salt=salt,
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info=INFO,
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)
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hkdf.verify(pkey, bytes(resA))
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def test_hkdf_fail(self, device, size, algo, out_len):
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pkey = os.urandom(size // 8)
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keyid = device.import_key(pkey)
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salt = os.urandom(16)
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resA = device.hkdf(algo, keyid, INFO, salt, out_len=out_len)
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device.delete_file(DOPrefixes.KEY_PREFIX.value << 8 | keyid)
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hkdf = HKDF(
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algorithm=algo(),
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length=out_len,
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salt=salt,
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info=INFO,
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)
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pkey = os.urandom(size // 8)
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with pytest.raises(exceptions.InvalidKey):
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hkdf.verify(pkey, bytes(resA))
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