53 lines
1.8 KiB
Python
53 lines
1.8 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.ciphers import Cipher, algorithms, modes
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from utils import Algorithm, DOPrefixes
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from const import DEFAULT_DKEK_SHARES, DEFAULT_DKEK
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MESSAGE = b'a secret message'
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def test_prepare_aes(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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def test_cipher_aes_cipher(device, size):
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pkey = os.urandom(size // 8)
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iv = b'\x00'*16
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keyid = device.import_key(pkey)
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cipher = Cipher(algorithms.AES(pkey), modes.CBC(iv))
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encryptor = cipher.encryptor()
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ctA = encryptor.update(MESSAGE) + encryptor.finalize()
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ctB = device.cipher(Algorithm.ALGO_AES_CBC_ENCRYPT, keyid, MESSAGE)
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assert(bytes(ctB) == ctA)
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decryptor = cipher.decryptor()
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plA = decryptor.update(ctA) + decryptor.finalize()
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plB = device.cipher(Algorithm.ALGO_AES_CBC_DECRYPT, keyid, ctA)
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device.delete_file(DOPrefixes.KEY_PREFIX.value << 8 | keyid)
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assert(bytes(plB) == plA)
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assert(bytes(plB) == MESSAGE)
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