Add projects/bitcoin-core (#5699)

projects/bitcoin-core/Dockerfile

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+# Copyright 2021 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
+
+# Packages taken from:
+# * https://github.com/bitcoin/bitcoin/blob/master/doc/build-unix.md#dependency-build-instructions
+# * https://github.com/bitcoin/bitcoin/blob/master/depends/README.md#for-linux-including-i386-arm-cross-compilation
+RUN apt-get update && apt-get install -y \
+  build-essential libtool autotools-dev automake pkg-config bsdmainutils python3 \
+  make automake cmake curl g++-multilib libtool binutils-gold bsdmainutils pkg-config patch bison \
+  wget \
+  zip
+
+RUN git clone --depth=1 https://github.com/bitcoin/bitcoin.git bitcoin-core
+RUN git clone --depth=1 https://github.com/bitcoin-core/qa-assets bitcoin-core/assets
+WORKDIR bitcoin-core
+COPY build.sh $SRC/

projects/bitcoin-core/build.sh

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+#!/bin/bash -eu
+# Copyright 2021 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.
+#
+################################################################################
+
+# Temporary workaround for https://github.com/google/oss-fuzz/issues/5697
+wget https://github.com/bitcoin/bitcoin/commit/0be1cb158899374722961b844f9f4b0dc5f8558b.patch
+( patch -p1 < ./*.patch ) || true
+
+# Build dependencies
+# This will also force static builds
+if [ "$ARCHITECTURE" = "i386" ]; then
+  export BUILD_TRIPLET="i686-pc-linux-gnu"
+else
+  export BUILD_TRIPLET="x86_64-pc-linux-gnu"
+fi
+(
+  cd depends
+  make HOST=$BUILD_TRIPLET DEBUG=1 NO_QT=1 NO_WALLET=1 NO_ZMQ=1 NO_UPNP=1 NO_NATPMP=1 -j$(nproc)
+)
+
+# Build the fuzz targets
+
+./autogen.sh
+
+# Limit to one target as temporary workaround for https://github.com/google/oss-fuzz/pull/5699#issuecomment-831030305
+export ONLY_ONE_TARGET="process_messages"
+sed -i "s|std::getenv(\"FUZZ\")|\"$ONLY_ONE_TARGET\"|g" "./src/test/fuzz/fuzz.cpp"
+
+# OSS-Fuzz will provide CC, CXX, etc. So only set:
+# * --enable-fuzz, see https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md
+# * CONFIG_SITE, see https://github.com/bitcoin/bitcoin/blob/master/depends/README.md
+CONFIG_SITE="$PWD/depends/$BUILD_TRIPLET/share/config.site" ./configure --enable-fuzz --with-sanitizers=fuzzer
+
+make -j$(nproc)
+
+mv ./src/test/fuzz/fuzz $OUT/$ONLY_ONE_TARGET
+
+(
+  cd assets/fuzz_seed_corpus
+  for folder in ./${ONLY_ONE_TARGET}*; do
+    zip --recurse-paths --quiet --junk-paths "$OUT/${folder}_seed_corpus.zip" "${folder}"
+  done
+)

projects/bitcoin-core/project.yaml

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+homepage: "https://github.com/bitcoin/bitcoin"
+main_repo: 'https://github.com/bitcoin/bitcoin.git'
+language: c++
+primary_contact: "marco@chaincode.com"
+auto_ccs:
+  - "fanquake@gmail.com"
+  - "john@brink.dev"
+  - "jonas@chaincode.com"
+  - "laanwj@gmail.com"
+  - "pieter@chaincode.com"
+  - "thomas.j.bitcoin@protonmail.com"
+sanitizers:
+  - address
+  - undefined
+architectures:
+  - x86_64
+fuzzing_engines:
+  - libfuzzer