pyasn1-modules: initial integration (#9293)

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

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

projects/pyasn1-modules/Dockerfile

@@ -0,0 +1,19 @@
+#!/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 pip3 install --upgrade pip
+RUN git clone https://github.com/pyasn1/pyasn1-modules pyasn1-modules
+COPY *.sh *py $SRC/
+WORKDIR $SRC/pyasn1-modules

projects/pyasn1-modules/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.
+#
+################################################################################
+pip3 install .
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/pyasn1-modules/fuzz_decode.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
+
+import pyasn1
+from pyasn1.codec.der import decoder as der_decoder
+
+from pyasn1_modules import pem
+from pyasn1_modules import rfc5280
+from pyasn1_modules import rfc3161
+
+pyasn1_module_list = [
+  rfc5280.AlgorithmIdentifier(),
+  rfc3161.TimeStampReq()
+]
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  
+  try:
+    substrate = pem.readBase64fromText(fdp.ConsumeUnicodeNoSurrogates(sys.maxsize))
+  except:
+    return # readBase64 is just a wrapper around base64 so we avoid issues
+
+  identifier = fdp.PickValueInList(pyasn1_module_list)
+  try:
+    der_decoder.decode(substrate, asnSpec=identifier)
+  except pyasn1.error.PyAsn1Error:
+    pass
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/pyasn1-modules/project.yaml

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+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/pyasn1/pyasn1-modules
+language: python
+main_repo: https://github.com/pyasn1/pyasn1-modules
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com