<reponame>korawit1188/oss-fuzz<gh_stars>0
#!/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 base64
import atheris
with atheris.instrument_imports():
    from cryptography.fernet import Fernet
    from cryptography.hazmat.primitives import hashes
    from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC

def TestInput(input_bytes):
   fdp = atheris.FuzzedDataProvider(input_bytes)
   plaintext = fdp.ConsumeBytes(32)

   key = Fernet(Fernet.generate_key())
   token = key.encrypt(plaintext)
   text = key.decrypt(token)
   assert (plaintext == text), "Encryption/Decrption error!"

   password = fdp.ConsumeBytes(8)
   salt = fdp.ConsumeBytes(16)
   kdf = PBKDF2HMAC(
      algorithm=hashes.SHA256(),
      length=32,
      salt=salt,
      iterations=1,
   )
   key = Fernet(base64.urlsafe_b64encode(kdf.derive(password)))
   token = key.encrypt(plaintext)
   text = key.decrypt(token)
   assert (plaintext == text), "Encryption/Decrption error!"

def main():
   atheris.Setup(sys.argv, TestInput, enable_python_coverage=False)
   atheris.Fuzz()

if __name__ == "__main__":
   main()
