mirror of https://github.com/google/oss-fuzz.git
91 lines
2.6 KiB
Python
91 lines
2.6 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.
|
|
"""Fuzzer for Packetizer"""
|
|
|
|
import os
|
|
import sys
|
|
import atheris
|
|
|
|
from hashlib import sha1
|
|
|
|
from cryptography.hazmat.backends import default_backend
|
|
from cryptography.hazmat.primitives.ciphers import algorithms, Cipher, modes
|
|
|
|
from paramiko import Message, Packetizer
|
|
from paramiko.common import byte_chr, zero_byte
|
|
|
|
# Extract path of fuzzer so we can include loop.py
|
|
if getattr(sys, 'frozen', False):
|
|
app_path = os.path.dirname(sys.executable)
|
|
elif __file__:
|
|
app_path = os.path.dirname(__file__)
|
|
else:
|
|
raise Exception("Could not extract path needed to import loop.py")
|
|
sys.path.append(app_path)
|
|
from loop import LoopSocket
|
|
|
|
def TestOneInput(data):
|
|
fdp = atheris.FuzzedDataProvider(data)
|
|
|
|
rsock = LoopSocket()
|
|
wsock = LoopSocket()
|
|
rsock.link(wsock)
|
|
p = Packetizer(wsock)
|
|
encryptor = Cipher(
|
|
algorithms.AES(zero_byte * 16),
|
|
modes.CBC(byte_chr(fdp.ConsumeIntInRange(0, 255)) * 16),
|
|
backend=default_backend(),
|
|
).encryptor()
|
|
p.set_outbound_cipher(
|
|
encryptor,
|
|
16,
|
|
sha1,
|
|
12,
|
|
byte_chr(fdp.ConsumeIntInRange(0, 255)) * 20
|
|
)
|
|
|
|
m = Message()
|
|
# Messages need to be at least 16 bytes long, so we'll include
|
|
# at least 16 items.
|
|
for i in range(fdp.ConsumeIntInRange(16, 32)):
|
|
op = fdp.ConsumeIntInRange(0,5)
|
|
if op == 0:
|
|
m.add(fdp.ConsumeUnicodeNoSurrogates(20))
|
|
elif op == 1:
|
|
m.add(fdp.ConsumeIntInRange(0, 4294967295))
|
|
elif op == 2:
|
|
m.add(fdp.ConsumeBool())
|
|
elif op == 3:
|
|
l1 = list()
|
|
for i in range(1, 10):
|
|
l1.append(fdp.ConsumeUnicodeNoSurrogates(20))
|
|
m.add(l1)
|
|
elif op == 4:
|
|
m.add_bytes(fdp.ConsumeBytes(20))
|
|
elif op == 5:
|
|
m.add_byte(byte_chr(fdp.ConsumeIntInRange(0,255)))
|
|
p.send_message(m)
|
|
rsock.recv(sys.maxsize)
|
|
|
|
|
|
def main():
|
|
atheris.instrument_all()
|
|
atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
|
|
atheris.Fuzz()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|