From 6f19f3acb55b8101ce96e7df2fe3d90de4041daf Mon Sep 17 00:00:00 2001
From: DavidKorczynski <david@adalogics.com>
Date: Tue, 5 Jan 2021 16:29:48 +0000
Subject: [PATCH] [pyyaml] Initial integration. (#4717)

---
 projects/pyyaml/Dockerfile     | 21 +++++++++++++++++++
 projects/pyyaml/build.sh       | 34 +++++++++++++++++++++++++++++++
 projects/pyyaml/fuzz_reader.py | 37 ++++++++++++++++++++++++++++++++++
 projects/pyyaml/project.yaml   | 10 +++++++++
 4 files changed, 102 insertions(+)
 create mode 100644 projects/pyyaml/Dockerfile
 create mode 100644 projects/pyyaml/build.sh
 create mode 100644 projects/pyyaml/fuzz_reader.py
 create mode 100644 projects/pyyaml/project.yaml

diff --git a/projects/pyyaml/Dockerfile b/projects/pyyaml/Dockerfile
new file mode 100644
index 000000000..3d5bc541c
--- /dev/null
+++ b/projects/pyyaml/Dockerfile
@@ -0,0 +1,21 @@
+# Copyright 2020 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
+RUN git clone https://github.com/yaml/pyyaml
+WORKDIR $SRC
+COPY build.sh $SRC/
+COPY fuzz_* $SRC/
diff --git a/projects/pyyaml/build.sh b/projects/pyyaml/build.sh
new file mode 100644
index 000000000..de7d84c2c
--- /dev/null
+++ b/projects/pyyaml/build.sh
@@ -0,0 +1,34 @@
+#!/bin/bash -eu
+# Copyright 2020 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 pyyaml
+python3 ./setup.py --without-libyaml 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 u+x $OUT/$fuzzer_basename
+done
diff --git a/projects/pyyaml/fuzz_reader.py b/projects/pyyaml/fuzz_reader.py
new file mode 100644
index 000000000..d7a0e2cb2
--- /dev/null
+++ b/projects/pyyaml/fuzz_reader.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python3
+
+# Copyright 2020 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 yaml.reader
+
+def TestOneInput(data):
+    if len(data) < 1:
+        return 
+    try:
+        stream = yaml.reader.Reader(data)
+        while stream.peek() != u'\0':
+            stream.forward()
+    except yaml.reader.ReaderError:
+        None
+
+    return 
+
+def main():
+    atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+    atheris.Fuzz()
+
+if __name__ == "__main__":
+    main()
diff --git a/projects/pyyaml/project.yaml b/projects/pyyaml/project.yaml
new file mode 100644
index 000000000..a04198a9e
--- /dev/null
+++ b/projects/pyyaml/project.yaml
@@ -0,0 +1,10 @@
+homepage: "https://github.com/yaml/pyyaml"
+language: python
+primary_contact: "pyyaml@yaml.com"
+auto_ccs:
+  - "david@adalogics.com"
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address
+main_repo: "https://github.com/yaml/pyyaml"