Add botan fuzzer scripts (#150)

projects/botan/Dockerfile

@@ -0,0 +1,23 @@
+# Copyright 2016 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 ossfuzz/base-libfuzzer
+MAINTAINER jack@randombit.net
+RUN apt-get install -y make python
+RUN git clone --depth 1 https://github.com/randombit/botan.git botan
+WORKDIR botan
+COPY build.sh $SRC/
+RUN ls -R $SRC/

projects/botan/build.sh

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+#!/bin/bash -eu
+# Copyright 2016 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.
+#
+################################################################################
+
+cd $SRC/botan
+
+# This assumes $CC is set to either 'clang' or 'gcc'
+./configure.py --cc=$CC --cc-bin=$CXX --cc-abi-flags="$CXXFLAGS" \
+               --unsafe-fuzzer-mode --disable-shared
+make -j$(nproc) libbotan-1.11.a
+
+jigs=$(find $SRC/botan/src/extra_tests/fuzzers/jigs -name "*.cpp")
+
+for fuzzer_src in $jigs; do
+  fuzzer_name=$(basename $fuzzer_src .cpp)
+  $CXX $CXXFLAGS -DUSE_LLVM_FUZZER -std=c++11 -I$SRC/botan/build/include \
+       -o $OUT/$fuzzer_name $fuzzer_src -L$SRC/botan -lbotan-1.11 -lFuzzingEngine
+
+  max_len=1024 # default max_len
+  if [ $fuzzer_name = 'ecc_bp256' ] || [ $fuzzer_name = 'ecc_p256' ] || [ $fuzzer_name = 'redc_p256' ]; then
+      max_len=64
+  elif [ $fuzzer_name = 'ecc_p384' ] || [ $fuzzer_name = 'redc_p384' ]; then
+      max_len=96
+  elif [ $fuzzer_name = 'ecc_p521' ] || [ $fuzzer_name = 'redc_p521' ]; then
+      max_len=132
+  fi
+
+  echo -en "[libfuzzer]\nmax_len = $max_len\n" > $OUT/${fuzzer_name}.options
+
+done