[libevent] Initial Integration (#3960)

* add libevent project

* edit indentations and add primary contact

* Fix indents

* Fix indents

Co-authored-by: Abhishek Arya <inferno@chromium.org>

projects/libevent/Dockerfile

@@ -0,0 +1,22 @@
+# Copyright 2020 Google Inc.
+#
+# 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
+MAINTAINER a3at.mail@gmail.com
+RUN apt-get update && apt-get install -y make autoconf automake libtool cmake
+RUN git clone --depth 1 https://github.com/libevent/libevent.git libevent
+WORKDIR libevent
+COPY build.sh *.cc $SRC/

projects/libevent/build.sh

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+#!/bin/bash -eu
+# Copyright 2020 Google Inc.
+#
+# 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.
+#
+################################################################################
+
+# build project
+sh autogen.sh
+./configure --disable-openssl
+make -j$(nproc) clean
+make -j$(nproc) all
+make install
+
+# build fuzzer
+for fuzzers in $(find $SRC -name '*_fuzzer.cc'); do
+  fuzz_basename=$(basename -s .cc $fuzzers)
+  $CXX $CXXFLAGS -std=c++11 -Iinclude \
+      $fuzzers $LIB_FUZZING_ENGINE ./.libs/libevent.a ./.libs/libevent_core.a  \
+      ./.libs/libevent_pthreads.a ./.libs/libevent_extra.a \
+      -o $OUT/$fuzz_basename
+done

projects/libevent/parse_query_fuzzer.cc

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+// 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.
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string>
+
+#include "libevent/include/event2/http.h"
+#include "libevent/include/event2/keyvalq_struct.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  std::string fuzz_string(reinterpret_cast<const char *>(data), size);
+  struct evkeyvalq headers;
+  evhttp_parse_query(fuzz_string.c_str(), &headers);
+  return 0;
+}

projects/libevent/project.yaml

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+homepage: "https://github.com/libevent/libevent"
+language: c++
+primary_contact: "a3at.mail@gmail.com"
+sanitizers:
+  - address
+  - memory
+  - undefined
+architectures:
+  - x86_64
+  - i386