88 lines
2.7 KiB
Python
88 lines
2.7 KiB
Python
# test_cryptocb.py
|
|
#
|
|
# Copyright (C) 2026 wolfSSL Inc.
|
|
#
|
|
# This file is part of wolfSSL. (formerly known as CyaSSL)
|
|
#
|
|
# wolfSSL is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# wolfSSL is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
# ty: ignore[possibly-missing-import]
|
|
|
|
from __future__ import annotations
|
|
|
|
import struct
|
|
|
|
import pytest
|
|
from typing_extensions import override
|
|
|
|
from wolfcrypt._ffi import lib as _lib
|
|
from wolfcrypt.random import Random
|
|
|
|
if _lib.SHA_ENABLED:
|
|
from wolfcrypt.hashes import Sha
|
|
|
|
if not _lib.CRYPTO_CB_ENABLED:
|
|
pytest.skip("Crypto Callbacks not supported", allow_module_level=True)
|
|
|
|
from wolfcrypt.cryptocb import CryptoCallback
|
|
|
|
|
|
def test_default_device_id():
|
|
# In the python implementation the default device ID is the invalid device ID.
|
|
assert CryptoCallback.default_device_id() == _lib.INVALID_DEVID
|
|
|
|
class RngCryptoCallback(CryptoCallback):
|
|
@override
|
|
def rng_callback(self, device_id: int, rng: _lib.RNG, size: int) -> bytes:
|
|
# Generate fake random data for testing purposes.
|
|
return bytes(range(1, 1 + size))
|
|
|
|
|
|
def test_rng_callback():
|
|
with RngCryptoCallback(10):
|
|
rng = Random(device_id=10)
|
|
|
|
random = rng.byte()
|
|
assert random == b"\01"
|
|
|
|
random = rng.bytes(1)
|
|
assert random == b"\01"
|
|
|
|
random = rng.bytes(3)
|
|
assert random == b"\01\02\03"
|
|
|
|
class HashCryptoCallback(CryptoCallback):
|
|
def __init__(self, device_id):
|
|
super().__init__(device_id)
|
|
self.data: list[bytes] = []
|
|
|
|
@override
|
|
def hash_update_callback(self, device_id: int, hash_type: int, data: bytes) -> None:
|
|
self.data.append(data)
|
|
|
|
@override
|
|
def hash_finalize_callback(self, device_id: int, hash_type: int) -> bytes:
|
|
# quite lame hash function, just returns the length of the data as an integer (padded to match the expected hash length).
|
|
return struct.pack("I16x", len(b"".join(self.data)))
|
|
|
|
|
|
if _lib.SHA_ENABLED:
|
|
def test_hash_callback():
|
|
with HashCryptoCallback(11):
|
|
sha = Sha(device_id=11)
|
|
sha.update(bytes(10))
|
|
sha.update(bytes(5))
|
|
digest = sha.digest()
|
|
assert digest == struct.pack("I16x", 15)
|