From c54e373cb66027a4f56492c66a14d0cd792ec864 Mon Sep 17 00:00:00 2001
From: DavidKorczynski <david@adalogics.com>
Date: Tue, 23 Aug 2022 14:44:18 +0100
Subject: [PATCH] grpcio/grpc-py: initial integration (#7756)

* grpc-py: initial integration

* add license

* nit

* grpc-py: add server fuzzer

* add doc
---
 projects/grpc-py/Dockerfile     | 25 +++++++++++
 projects/grpc-py/build.sh       | 26 +++++++++++
 projects/grpc-py/fuzz_server.py | 79 +++++++++++++++++++++++++++++++++
 projects/grpc-py/project.yaml   | 11 +++++
 4 files changed, 141 insertions(+)
 create mode 100644 projects/grpc-py/Dockerfile
 create mode 100644 projects/grpc-py/build.sh
 create mode 100644 projects/grpc-py/fuzz_server.py
 create mode 100644 projects/grpc-py/project.yaml

diff --git a/projects/grpc-py/Dockerfile b/projects/grpc-py/Dockerfile
new file mode 100644
index 000000000..ff154abe0
--- /dev/null
+++ b/projects/grpc-py/Dockerfile
@@ -0,0 +1,25 @@
+# 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 apt install python3-dev libssl-dev libre2-dev -y
+RUN git clone https://github.com/grpc/grpc grpc && \
+    cd grpc && \
+    git submodule update --init
+WORKDIR grpc
+COPY build.sh *.py $SRC/
diff --git a/projects/grpc-py/build.sh b/projects/grpc-py/build.sh
new file mode 100644
index 000000000..875f1149e
--- /dev/null
+++ b/projects/grpc-py/build.sh
@@ -0,0 +1,26 @@
+#!/bin/bash -eu
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+pip3 install --upgrade pip
+pip3 install -r ./requirements.txt
+
+GRPC_PYTHON_CFLAGS="${CFLAGS}" GRPC_PYTHON_BUILD_SYSTEM_RE2=true GRPC_PYTHON_BUILD_SYSTEM_OPENSSL=true GRPC_PYTHON_BUILD_SYSTEM_ZLIB=true pip3 install -v . 
+
+cd $SRC/grpc/examples/python/helloworld
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer --add-data helloworld_pb2.py:. --add-data helloworld_pb2_grpc.py:.
+done
diff --git a/projects/grpc-py/fuzz_server.py b/projects/grpc-py/fuzz_server.py
new file mode 100644
index 000000000..a536168eb
--- /dev/null
+++ b/projects/grpc-py/fuzz_server.py
@@ -0,0 +1,79 @@
+#!/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.
+"""Fuzz grpc server using the Greeter example"""
+
+import sys
+import time
+import grpc
+import socket
+import atheris
+import threading
+from concurrent.futures import ThreadPoolExecutor
+from google.protobuf.internal import builder as _builder
+
+# Extract path of fuzzer so we can include protobuf modules
+if getattr(sys, 'frozen', False):
+    app_path = os.path.dirname(sys.executable)
+elif __file__:
+    app_path = os.path.dirname(__file__)
+else:
+    raise Exception("Could not extract path needed to import loop.py")
+sys.path.append(app_path)
+
+import helloworld_pb2
+import helloworld_pb2_grpc
+
+
+# Simple server
+class FuzzGreeter(helloworld_pb2_grpc.GreeterServicer):
+    def SayHello(self, request, context):
+        print("In server")
+        return helloworld_pb2.HelloReply(message='Hello from fuzz server, %s!' % request.name)
+
+
+def serve() -> None:
+    """Starts fuzz server"""
+    server = grpc.server(ThreadPoolExecutor(max_workers=1))
+    helloworld_pb2_grpc.add_GreeterServicer_to_server(FuzzGreeter(), server)
+    server.add_insecure_port('[::]:50051')
+    server.start()
+    server.wait_for_termination()
+    return
+
+
+def TestInput(input_bytes):
+   """Send fuzzing input to the server"""
+   time.sleep(0.02)
+   with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+      s.connect(("localhost", 50051))
+      s.sendall(input_bytes)
+      data = s.recv(1024)
+   return
+
+
+def main():
+   # Launch a grpc server
+   _thread = threading.Thread(target=serve)
+   _thread.start()
+   time.sleep(0.2)
+
+   # Start fuzzing
+   atheris.instrument_all()
+   atheris.Setup(sys.argv, TestInput, enable_python_coverage=True)
+   atheris.Fuzz()
+
+
+if __name__ == "__main__":
+   main()
diff --git a/projects/grpc-py/project.yaml b/projects/grpc-py/project.yaml
new file mode 100644
index 000000000..ba978416c
--- /dev/null
+++ b/projects/grpc-py/project.yaml
@@ -0,0 +1,11 @@
+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/grpc/grpc
+language: python
+main_repo: https://github.com/grpc/grpc
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com
+- adam@adalogics.com