click: initial integration (#9319)

Signed-off-by: David Korczynski <david@adalogics.com>

Signed-off-by: David Korczynski <david@adalogics.com>

projects/click/Dockerfile

@@ -0,0 +1,18 @@
+#!/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.
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN git clone https://github.com/pallets/click click
+COPY *.sh *py $SRC/
+WORKDIR $SRC/click

projects/click/build.sh

@@ -0,0 +1,22 @@
+#!/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 .
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/click/fuzz_parser.py

@@ -0,0 +1,56 @@
+#!/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
+
+import click
+from click.parser import OptionParser
+from click import exceptions
+
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+
+  # Create a parser we can fuzz.
+  # This can be extended further by creating logic that will create arbitrary
+  # parser.
+  ctx = click.Context(click.Command("fuzz"))
+  parser = OptionParser(ctx)
+  click.Option("+z", is_flag=True).add_to_parser(parser, ctx)
+  click.Option("-b", is_flag=False).add_to_parser(parser, ctx)
+  click.Option("+c", multiple=fdp.ConsumeBool()).add_to_parser(parser, ctx)
+  click.Option("-d", default="abc").add_to_parser(parser, ctx)
+  click.Option("+e", type=int).add_to_parser(parser, ctx)
+  click.Option("-f", type=click.Choice(["option1", "option2"])).add_to_parser(parser, ctx)
+  click.Option("!g", type=click.Choice(["option1", "option2"])).add_to_parser(parser, ctx)
+  click.Option("!h", default="abcd").add_to_parser(parser, ctx)
+  
+  args = []
+  for idx in range(fdp.ConsumeIntInRange(1, 15)):
+    args.append(fdp.ConsumeUnicodeNoSurrogates(64))
+  try:
+    parser.parse_args(args)
+  except exceptions.ClickException:
+    pass
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/click/project.yaml

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+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/pallets/click
+language: python
+main_repo: https://github.com/pallets/click
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com