1#!/bin/bash
2# Copyright 2020 The Go Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style
4# license that can be found in the LICENSE file.
5
6# Do not run directly; run build.sh, which runs this in Docker.
7# This script builds boringssl, which has already been unpacked in /boring/boringssl.
8
9set -e
10id
11date
12cd /boring
13
14# Go requires -fPIC for linux/amd64 cgo builds.
15# Setting -fPIC only affects the compilation of the non-module code in libcrypto.a,
16# because the FIPS module itself is already built with -fPIC.
17echo '#!/bin/bash
18exec clang-'$ClangV' -DGOBORING -fPIC "$@"
19' >/usr/local/bin/clang
20echo '#!/bin/bash
21exec clang++-'$ClangV' -DGOBORING -fPIC "$@"
22' >/usr/local/bin/clang++
23chmod +x /usr/local/bin/clang /usr/local/bin/clang++
24
25# The BoringSSL tests use Go, and cgo would look for gcc.
26export CGO_ENABLED=0
27
28# Modify the support code crypto/mem.c (outside the FIPS module)
29# to not try to use weak symbols, because they don't work with some
30# Go toolchain / clang toolchain combinations.
31perl -p -i -e 's/defined.*ELF.*defined.*GNUC.*/$0 \&\& !defined(GOBORING)/' boringssl/crypto/mem.c
32
33# We build all of libcrypto, which includes a bunch of I/O operations that we
34# don't actually care about, since we only really want the BoringCrypto module.
35# In libcrypto, they use the LFS64 interfaces where available in order to
36# traverse files larger than 2GB. In some scenarios this can cause breakage, so
37# we comment out the _FILE_OFFSET_BITS definition which enables the LFS64
38# interfaces. Since this code is outside of the FIPS module, it doesn't affect
39# the certification status of the module. See b/364606941 for additional context.
40perl -p -i -e 's/(#define _FILE_OFFSET_BITS 64)/\/\/ $1/' boringssl/crypto/bio/file.c
41
42# Verbatim instructions from BoringCrypto build docs.
43printf "set(CMAKE_C_COMPILER \"clang\")\nset(CMAKE_CXX_COMPILER \"clang++\")\n" >${HOME}/toolchain
44cd boringssl
45mkdir build && cd build && cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=${HOME}/toolchain -DFIPS=1 -DCMAKE_BUILD_TYPE=Release ..
46# SSLTest.HostMatching fails due to an expired certificate.
47ninja && faketime 2022-06-13 ninja run_tests
48cd ../..
49
50if [ "$(./boringssl/build/tool/bssl isfips)" != 1 ]; then
51 echo "NOT FIPS"
52 exit 2
53fi
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