python-rsa: initial integration (#7516)

* python-rsa: initial integration

* add assert

* update to new build set up

projects/python-rsa/Dockerfile

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+# 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/sybrenstuvel/python-rsa
+WORKDIR $SRC
+COPY build.sh fuzz_* $SRC/

projects/python-rsa/build.sh

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+#!/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.
+#
+################################################################################
+
+cd python-rsa
+pip3 install .
+
+# Build fuzzers
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/python-rsa/fuzz_roundtrip.py

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+#!/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
+
+with atheris.instrument_imports():
+  import rsa
+
+@atheris.instrument_func
+def TestOneInput(input_bytes):
+  fdp = atheris.FuzzedDataProvider(input_bytes)
+  key = fdp.ConsumeIntInRange(16, 9999)
+  message = fdp.ConsumeBytes(atheris.ALL_REMAINING)
+
+  try:
+    pub, priv = rsa.newkeys(key)
+  except ValueError:
+    return
+
+  try:
+    encrypted = rsa.encrypt(message, pub)
+  except OverflowError:
+    return
+
+  decrypted = rsa.decrypt(encrypted, priv)
+  assert(decrypted == message)
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/python-rsa/project.yaml

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+homepage: "https://stuvel.eu/software/rsa/"
+main_repo: "https://github.com/sybrenstuvel/python-rsa"
+language: python
+primary_contact: "david@adalogics.com"
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address