84 lines
3.4 KiB
Bash
Executable File
84 lines
3.4 KiB
Bash
Executable File
#!/bin/bash -eu
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# Copyright 2021 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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################################################################################
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BASE=${SRC}/openvpn/src/openvpn
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apply_sed_changes() {
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sed -i 's/read(/fuzz_read(/g' ${BASE}/console_systemd.c
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sed -i 's/fgets(/fuzz_fgets(/g' ${BASE}/console_builtin.c
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sed -i 's/fgets(/fuzz_fgets(/g' ${BASE}/misc.c
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sed -i 's/#include "forward.h"/#include "fuzz_header.h"\n#include "forward.h"/g' ${BASE}/proxy.c
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sed -i 's/select(/fuzz_select(/g' ${BASE}/proxy.c
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sed -i 's/send(/fuzz_send(/g' ${BASE}/proxy.c
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sed -i 's/recv(/fuzz_recv(/g' ${BASE}/proxy.c
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sed -i 's/isatty/fuzz_isatty/g' ${BASE}/console_builtin.c
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sed -i 's/fopen/fuzz_fopen/g' ${BASE}/console_builtin.c
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sed -i 's/fclose/fuzz_fclose/g' ${BASE}/console_builtin.c
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sed -i 's/sendto/fuzz_sendto/g' ${BASE}/socket.h
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sed -i 's/#include "misc.h"/#include "misc.h"\nextern size_t fuzz_sendto(int sockfd, void *buf, size_t len, int flags, struct sockaddr *dest_addr, socklen_t addrlen);/g' ${BASE}/socket.h
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sed -i 's/fp = (flags/fp = stdout;\n\/\//g' ${BASE}/error.c
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sed -i 's/crypto_msg(M_FATAL/crypto_msg(M_WARN/g' ${BASE}/crypto_openssl.c
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sed -i 's/msg(M_FATAL, \"Cipher/return;msg(M_FATAL, \"Cipher/g' ${BASE}/crypto.c
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sed -i 's/msg(M_FATAL/msg(M_WARN/g' ${BASE}/crypto.c
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sed -i 's/= write/= fuzz_write/g' ${BASE}/packet_id.c
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}
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# Changes in the code so we can fuzz it.
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git apply $SRC/crypto_patch.txt
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echo "" >> ${BASE}/openvpn.c
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echo "#include \"fake_fuzz_header.h\"" >> ${BASE}/openvpn.c
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echo "ssize_t fuzz_get_random_data(void *buf, size_t len) { return 0; }" >> ${BASE}/fake_fuzz_header.h
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echo "int fuzz_success;" >> ${BASE}/fake_fuzz_header.h
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# Apply hooking changes
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apply_sed_changes
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# Copy corpuses out
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zip -r $OUT/fuzz_verify_cert_seed_corpus.zip $SRC/boringssl/fuzz/cert_corpus
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# Build openvpn
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autoreconf -ivf
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./configure --disable-lz4 --with-crypto-library=openssl OPENSSL_LIBS="-L/usr/local/ssl/ -lssl -lcrypto" OPENSSL_CFLAGS="-I/usr/local/ssl/include/"
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make
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# Make openvpn object files into a library we can link fuzzers to
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cd src/openvpn
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rm openvpn.o
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ar r libopenvpn.a *.o
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# Compile our fuzz helper
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$CXX $CXXFLAGS -g -c $SRC/fuzz_randomizer.cpp -o $SRC/fuzz_randomizer.o
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# Compile the fuzzers
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for fuzzname in dhcp misc base64 proxy buffer route packet_id mroute list verify_cert forward crypto; do
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$CC -DHAVE_CONFIG_H -I. -I../.. -I../../include -I../../src/compat \
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-DPLUGIN_LIBDIR=\"/usr/local/lib/openvpn/plugins\" -std=c99 $CFLAGS \
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-c $SRC/fuzz_${fuzzname}.c -o $SRC/fuzz_${fuzzname}.o
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# Link with CXX
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$CXX ${CXXFLAGS} ${LIB_FUZZING_ENGINE} $SRC/fuzz_${fuzzname}.o -o $OUT/fuzz_${fuzzname} $SRC/fuzz_randomizer.o \
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libopenvpn.a ../../src/compat/.libs/libcompat.a /usr/lib/x86_64-linux-gnu/libnsl.a \
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/usr/lib/x86_64-linux-gnu/libresolv.a /usr/lib/x86_64-linux-gnu/liblzo2.a \
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-lssl -lcrypto -ldl
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done
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