diff --git a/projects/pyjwt/Dockerfile b/projects/pyjwt/Dockerfile new file mode 100644 index 000000000..6c503f563 --- /dev/null +++ b/projects/pyjwt/Dockerfile @@ -0,0 +1,21 @@ +# 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. +# +################################################################################ + +FROM gcr.io/oss-fuzz-base/base-builder-python +RUN apt-get update && apt-get install -y make autoconf automake libtool +RUN git clone --depth 1 https://github.com/jpadilla/pyjwt +WORKDIR pyjwt +COPY build.sh *.py $SRC/ diff --git a/projects/pyjwt/build.sh b/projects/pyjwt/build.sh new file mode 100755 index 000000000..1974eb7eb --- /dev/null +++ b/projects/pyjwt/build.sh @@ -0,0 +1,21 @@ +#!/bin/bash -eu +# 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. +# +################################################################################ + +pip3 install . +for fuzzer in $(find $SRC -name 'fuzz_*.py'); do + compile_python_fuzzer $fuzzer +done diff --git a/projects/pyjwt/fuzz_jwt.py b/projects/pyjwt/fuzz_jwt.py new file mode 100644 index 000000000..9a001af4c --- /dev/null +++ b/projects/pyjwt/fuzz_jwt.py @@ -0,0 +1,64 @@ +#!/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 os +import sys +import atheris + +import jwt +import json +from collections.abc import Mapping + + +def test_decoding(data): + """Checks jwt decoding does not fail""" + fdp = atheris.FuzzedDataProvider(data) + s1 = fdp.ConsumeUnicodeNoSurrogates(1024) + try: + _ = jwt.decode(s1, algorithms=["HS256"]) + except jwt.exceptions.PyJWTError: + pass + + +def test_roundtrip(data): + """Check payload == decoded(encoded(payload))""" + fdp = atheris.FuzzedDataProvider(data) + try: + payload = json.loads(fdp.ConsumeUnicodeNoSurrogates(1024)) + except: + return + # Only continue if correct type was created as payload. + if not isinstance(payload, Mapping): + return + + key = "fuzzing" + jwt_message = jwt.encode(payload, key, algorithm="HS256") + decoded_payload = jwt.decode(jwt_message, key, algorithms=["HS256"]) + assert decoded_payload == payload + + +def TestOneInput(data): + test_decoding(data) + test_roundtrip(data) + + +def main(): + atheris.instrument_all() + atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True) + atheris.Fuzz() + + +if __name__ == "__main__": + main() diff --git a/projects/pyjwt/project.yaml b/projects/pyjwt/project.yaml new file mode 100644 index 000000000..bbc1baf50 --- /dev/null +++ b/projects/pyjwt/project.yaml @@ -0,0 +1,12 @@ +homepage: "https://github.com/jpadilla/pyjwt" +language: python +main_repo: "https://github.com/jpadilla/pyjwt" +fuzzing_engines: +- libfuzzer +sanitizers: +- address +- undefined +vendor_ccs: +- david@adalogics.com +- adam@adalogics.com +- arthur.chan@adalogics.com