connexion: initial integration (#9744)

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

projects/connexion/Dockerfile

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+#!/usr/bin/python3
+# Copyright 2023 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 pip3 install --upgrade pip asgiref flask
+RUN git clone https://github.com/spec-first/connexion connexion
+COPY *.sh *py $SRC/
+WORKDIR $SRC/connexion

projects/connexion/build.sh

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+#!/bin/bash -eu
+# Copyright 2023 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
+  # Add relevant data and two hidden modules
+  compile_python_fuzzer $fuzzer \
+      --add-data ./connexion/resources/schemas/:connexion/resources/schemas/ \
+      --hidden-import=asgiref \
+      --hidden-import=flask
+done

projects/connexion/fuzz_query_resolving.py

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+#!/usr/bin/python3
+# Copyright 2023 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 connexion
+
+from werkzeug.datastructures import MultiDict
+
+
+def fixed_params(data):
+  """Create a given URI parser and pass in fixed params for the URI object
+  and a random query."""
+  fdp = atheris.FuzzedDataProvider(data)
+  collection_formats = ['csv', 'pipes', 'multi']
+  parameters = [{
+      "name": "letters",
+      "in": "query",
+      "type": "string",
+      "items": {
+          "type": "string"
+      },
+      "collectionFormat": fdp.PickValueInList(collection_formats),
+  }]
+
+  parser_classes = [
+      connexion.uri_parsing.OpenAPIURIParser,
+      connexion.uri_parsing.Swagger2URIParser,
+      connexion.uri_parsing.AlwaysMultiURIParser,
+      connexion.uri_parsing.FirstValueURIParser,
+  ]
+  parser_class = fdp.PickValueInList(parser_classes)
+  parser = parser_class(parameters, {})
+  param_dict = MultiDict([
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24)),
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24)),
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24)),
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24))
+  ])
+  parser.resolve_query(param_dict.to_dict(flat=False))
+
+
+def arbitrary(data):
+  """Create a given URI parser and pass in random params as well as random
+  query params."""
+  fdp = atheris.FuzzedDataProvider(data)
+  collection_formats = ['csv', 'pipes', 'multi']
+  parameters = [{
+      fdp.ConsumeUnicodeNoSurrogates(24): fdp.ConsumeUnicodeNoSurrogates(24),
+      fdp.ConsumeUnicodeNoSurrogates(24): fdp.ConsumeUnicodeNoSurrogates(24),
+      fdp.ConsumeUnicodeNoSurrogates(24): fdp.ConsumeUnicodeNoSurrogates(24),
+      fdp.ConsumeUnicodeNoSurrogates(24): {
+          fdp.ConsumeUnicodeNoSurrogates(24): fdp.ConsumeUnicodeNoSurrogates(24)
+      },
+      "collectionFormat": fdp.PickValueInList(collection_formats),
+  }]
+
+  parser_classes = [
+      connexion.uri_parsing.OpenAPIURIParser,
+      connexion.uri_parsing.Swagger2URIParser,
+      connexion.uri_parsing.AlwaysMultiURIParser,
+      connexion.uri_parsing.FirstValueURIParser,
+  ]
+  parser_class = fdp.PickValueInList(parser_classes)
+  try:
+    parser = parser_class(parameters, {})
+  except KeyError:
+    return
+  param_dict = MultiDict([
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24)),
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24)),
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24)),
+      (fdp.ConsumeUnicodeNoSurrogates(24), fdp.ConsumeUnicodeNoSurrogates(24))
+  ])
+  parser.resolve_query(param_dict.to_dict(flat=False))
+
+
+def TestOneInput(data):
+  fixed_params(data)
+  arbitrary(data)
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/connexion/project.yaml

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