ecdsa-python: initial integration

projects/ecdsa-python/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/starkbank/ecdsa-python/
+WORKDIR $SRC
+COPY build.sh $SRC/
+COPY fuzz_* $SRC/

projects/ecdsa-python/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 ecdsa-python
+python3 ./setup.py install
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  fuzzer_basename=$(basename -s .py $fuzzer)
+  fuzzer_package=${fuzzer_basename}.pkg
+  pyinstaller --distpath $OUT --onefile --name $fuzzer_package $fuzzer
+
+  # Create execution wrapper.
+  echo "#!/bin/sh
+# LLVMFuzzerTestOneInput for fuzzer detection.
+this_dir=\$(dirname \"\$0\")
+LD_PRELOAD=\$this_dir/sanitizer_with_fuzzer.so \
+ASAN_OPTIONS=\$ASAN_OPTIONS:symbolize=1:external_symbolizer_path=\$this_dir/llvm-symbolizer:detect_leaks=0 \
+\$this_dir/$fuzzer_package \$@" > $OUT/$fuzzer_basename
+  chmod +x $OUT/$fuzzer_basename
+done

projects/ecdsa-python/fuzz_private_key.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():
+  from ellipticcurve import Ecdsa, Signature, PublicKey, PrivateKey
+
+
+@atheris.instrument_func
+def TestOneInput(input_bytes):
+  fdp = atheris.FuzzedDataProvider(input_bytes)
+
+  privateKey1 = PrivateKey()
+  publicKey1 = privateKey1.publicKey()
+
+  privateKeyPem = privateKey1.toPem()
+  publicKeyPem = publicKey1.toPem()
+
+  privateKey2 = PrivateKey.fromPem(privateKeyPem)
+  publicKey2 = PublicKey.fromPem(publicKeyPem)
+
+  message = fdp.ConsumeUnicode(sys.maxsize)
+
+  signatureBase64 = Ecdsa.sign(message=message,
+                               privateKey=privateKey2).toBase64()
+
+  signature = Signature.fromBase64(signatureBase64)
+  assert(Ecdsa.verify(message=message, signature=signature, publicKey=publicKey2))
+
+
+def main():
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/ecdsa-python/project.yaml

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+homepage: "https://github.com/starkbank/ecdsa-python"
+language: python
+primary_contact: "[email protected]"
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address
+main_repo: "https://github.com/starkbank/ecdsa-python/"