mirror of https://github.com/google/oss-fuzz.git
67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
#!/usr/bin/python3
|
|
|
|
# Copyright 2022 Google LLC
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
import sys
|
|
import atheris
|
|
with atheris.instrument_imports():
|
|
from cryptography.hazmat.primitives import hashes
|
|
from cryptography.hazmat.primitives.asymmetric import dh
|
|
from cryptography.hazmat.primitives.kdf.hkdf import HKDF
|
|
|
|
def TestInput(input_bytes):
|
|
fdp = atheris.FuzzedDataProvider(input_bytes)
|
|
|
|
try:
|
|
parameters = dh.generate_parameters(
|
|
generator=(2 if fdp.ConsumeBool() else 5),
|
|
key_size=fdp.ConsumeInt(15)
|
|
)
|
|
except ValueError as e:
|
|
if "DH key_size must be at least 512 bits" not in str(e):
|
|
raise e
|
|
else:
|
|
return
|
|
|
|
server_private_key = parameters.generate_private_key()
|
|
peer_private_key = parameters.generate_private_key()
|
|
server_derived_shared_key = server_private_key.exchange(peer_private_key.public_key())
|
|
peer_derived_shared_key = peer_private_key.exchange(server_private_key.public_key())
|
|
|
|
infobytes = fdp.ConsumeBytes(10)
|
|
|
|
server_derived_key = HKDF(
|
|
algorithm=hashes.SHA256(),
|
|
length=32,
|
|
salt=None,
|
|
info=infobytes,
|
|
).derive(server_derived_shared_key)
|
|
|
|
peer_derived_key = HKDF(
|
|
algorithm=hashes.SHA256(),
|
|
length=32,
|
|
salt=None,
|
|
info=infobytes,
|
|
).derive(peer_derived_shared_key)
|
|
|
|
assert (server_derived_key == peer_derived_key), "Key Derivation Error!!"
|
|
|
|
def main():
|
|
atheris.Setup(sys.argv, TestInput, enable_python_coverage=False)
|
|
atheris.instrument_all()
|
|
atheris.Fuzz()
|
|
|
|
if __name__ == "__main__":
|
|
main()
|