697 lines
22 KiB
Rust
697 lines
22 KiB
Rust
use fslock::LockFile;
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use std::ffi::OsString;
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use std::fs;
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use std::io;
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use std::io::Write;
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use std::path::{Path, PathBuf};
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use std::process::{Command, Output};
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use std::sync::OnceLock;
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use crate::config::Config;
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mod config;
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// Android NDK >= 19.
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const CMAKE_PARAMS_ANDROID_NDK: &[(&str, &[(&str, &str)])] = &[
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("aarch64", &[("ANDROID_ABI", "arm64-v8a")]),
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("arm", &[("ANDROID_ABI", "armeabi-v7a")]),
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("x86", &[("ANDROID_ABI", "x86")]),
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("x86_64", &[("ANDROID_ABI", "x86_64")]),
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];
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fn cmake_params_android(config: &Config) -> &'static [(&'static str, &'static str)] {
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for (android_arch, params) in CMAKE_PARAMS_ANDROID_NDK {
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if *android_arch == config.target_arch {
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return params;
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}
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}
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&[]
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}
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const CMAKE_PARAMS_APPLE: &[(&str, &[(&str, &str)])] = &[
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// iOS
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(
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"aarch64-apple-ios",
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&[
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("CMAKE_OSX_ARCHITECTURES", "arm64"),
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("CMAKE_OSX_SYSROOT", "iphoneos"),
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],
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),
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(
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"aarch64-apple-ios-sim",
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&[
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("CMAKE_OSX_ARCHITECTURES", "arm64"),
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("CMAKE_OSX_SYSROOT", "iphonesimulator"),
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],
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),
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(
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"x86_64-apple-ios",
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&[
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("CMAKE_OSX_ARCHITECTURES", "x86_64"),
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("CMAKE_OSX_SYSROOT", "iphonesimulator"),
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],
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),
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// macOS
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(
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"aarch64-apple-darwin",
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&[
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("CMAKE_OSX_ARCHITECTURES", "arm64"),
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("CMAKE_OSX_SYSROOT", "macosx"),
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],
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),
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(
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"x86_64-apple-darwin",
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&[
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("CMAKE_OSX_ARCHITECTURES", "x86_64"),
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("CMAKE_OSX_SYSROOT", "macosx"),
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],
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),
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];
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fn cmake_params_apple(config: &Config) -> &'static [(&'static str, &'static str)] {
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for (next_target, params) in CMAKE_PARAMS_APPLE {
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if *next_target == config.target {
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return params;
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}
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}
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&[]
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}
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fn get_apple_sdk_name(config: &Config) -> &'static str {
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for (name, value) in cmake_params_apple(config) {
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if *name == "CMAKE_OSX_SYSROOT" {
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return value;
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}
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}
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panic!(
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"cannot find SDK for {} in CMAKE_PARAMS_APPLE",
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config.target
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);
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}
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/// Returns an absolute path to the BoringSSL source.
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fn get_boringssl_source_path(config: &Config) -> &PathBuf {
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if let Some(src_path) = &config.env.source_path {
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return src_path;
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}
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static SOURCE_PATH: OnceLock<PathBuf> = OnceLock::new();
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SOURCE_PATH.get_or_init(|| {
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let submodule_dir = if config.features.fips {
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"boringssl-fips"
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} else {
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"boringssl"
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};
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let src_path = config.out_dir.join(submodule_dir);
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let submodule_path = config.manifest_dir.join("deps").join(submodule_dir);
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if !submodule_path.join("CMakeLists.txt").exists() {
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println!("cargo:warning=fetching boringssl git submodule");
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run_command(
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Command::new("git")
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.args(["submodule", "update", "--init", "--recursive"])
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.arg(&submodule_path),
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)
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.unwrap();
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}
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let _ = fs::remove_dir_all(&src_path);
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fs_extra::dir::copy(submodule_path, &config.out_dir, &Default::default()).unwrap();
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// NOTE: .git can be both file and dir, depening on whether it was copied from a submodule
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// or created by the patches code.
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let src_git_path = src_path.join(".git");
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let _ = fs::remove_file(&src_git_path);
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let _ = fs::remove_dir_all(&src_git_path);
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src_path
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})
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}
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/// Returns the platform-specific output path for lib.
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///
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/// MSVC generator on Windows place static libs in a target sub-folder,
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/// so adjust library location based on platform and build target.
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/// See issue: https://github.com/alexcrichton/cmake-rs/issues/18
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fn get_boringssl_platform_output_path(config: &Config) -> String {
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if config.target_env == "msvc" {
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// Code under this branch should match the logic in cmake-rs
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let debug_env_var = config
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.env
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.debug
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.as_ref()
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.expect("DEBUG variable not defined in env");
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let deb_info = match debug_env_var.to_str() {
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Some("false") => false,
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Some("true") => true,
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_ => panic!("Unknown DEBUG={:?} env var.", debug_env_var),
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};
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let opt_env_var = config
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.env
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.opt_level
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.as_ref()
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.expect("OPT_LEVEL variable not defined in env");
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let subdir = match opt_env_var.to_str() {
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Some("0") => "Debug",
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Some("1" | "2" | "3") => {
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if deb_info {
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"RelWithDebInfo"
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} else {
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"Release"
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}
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}
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Some("s" | "z") => "MinSizeRel",
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_ => panic!("Unknown OPT_LEVEL={:?} env var.", opt_env_var),
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};
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subdir.to_string()
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} else {
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"".to_string()
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}
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}
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/// Returns a new cmake::Config for building BoringSSL.
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///
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/// It will add platform-specific parameters if needed.
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fn get_boringssl_cmake_config(config: &Config) -> cmake::Config {
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let src_path = get_boringssl_source_path(config);
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let mut boringssl_cmake = cmake::Config::new(src_path);
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if config.host != config.target {
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// Add platform-specific parameters for cross-compilation.
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match &*config.target_os {
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"android" => {
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// We need ANDROID_NDK_HOME to be set properly.
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let android_ndk_home = config
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.env
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.android_ndk_home
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.as_ref()
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.expect("Please set ANDROID_NDK_HOME for Android build");
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for (name, value) in cmake_params_android(config) {
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eprintln!("android arch={} add {}={}", config.target_arch, name, value);
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boringssl_cmake.define(name, value);
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}
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let toolchain_file = android_ndk_home.join("build/cmake/android.toolchain.cmake");
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let toolchain_file = toolchain_file.to_str().unwrap();
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eprintln!("android toolchain={}", toolchain_file);
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boringssl_cmake.define("CMAKE_TOOLCHAIN_FILE", toolchain_file);
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// 21 is the minimum level tested. You can give higher value.
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boringssl_cmake.define("ANDROID_NATIVE_API_LEVEL", "21");
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boringssl_cmake.define("ANDROID_STL", "c++_shared");
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}
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"macos" => {
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for (name, value) in cmake_params_apple(config) {
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eprintln!("macos arch={} add {}={}", config.target_arch, name, value);
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boringssl_cmake.define(name, value);
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}
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}
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"ios" => {
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for (name, value) in cmake_params_apple(config) {
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eprintln!("ios arch={} add {}={}", config.target_arch, name, value);
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boringssl_cmake.define(name, value);
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}
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// Bitcode is always on.
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let bitcode_cflag = "-fembed-bitcode";
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// Hack for Xcode 10.1.
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let target_cflag = if config.target_arch == "x86_64" {
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"-target x86_64-apple-ios-simulator"
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} else {
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""
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};
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let cflag = format!("{} {}", bitcode_cflag, target_cflag);
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boringssl_cmake.define("CMAKE_ASM_FLAGS", &cflag);
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boringssl_cmake.cflag(&cflag);
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}
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"windows" => {
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if config.host.contains("windows") {
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// BoringSSL's CMakeLists.txt isn't set up for cross-compiling using Visual Studio.
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// Disable assembly support so that it at least builds.
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boringssl_cmake.define("OPENSSL_NO_ASM", "YES");
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}
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}
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"linux" => match &*config.target_arch {
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"x86" => {
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boringssl_cmake.define(
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"CMAKE_TOOLCHAIN_FILE",
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// `src_path` can be a path relative to the manifest dir, but
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// cmake hates that.
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config
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.manifest_dir
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.join(src_path)
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.join("src/util/32-bit-toolchain.cmake")
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.as_os_str(),
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);
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}
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"aarch64" => {
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boringssl_cmake.define(
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"CMAKE_TOOLCHAIN_FILE",
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config
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.manifest_dir
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.join("cmake/aarch64-linux.cmake")
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.as_os_str(),
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);
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}
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"arm" => {
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boringssl_cmake.define(
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"CMAKE_TOOLCHAIN_FILE",
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config
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.manifest_dir
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.join("cmake/armv7-linux.cmake")
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.as_os_str(),
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);
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}
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_ => {
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eprintln!(
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"warning: no toolchain file configured by boring-sys for {}",
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config.target
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);
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}
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},
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_ => {}
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}
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}
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boringssl_cmake
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}
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/// Verify that the toolchains match https://csrc.nist.gov/CSRC/media/projects/cryptographic-module-validation-program/documents/security-policies/140sp3678.pdf
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/// See "Installation Instructions" under section 12.1.
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// TODO: maybe this should also verify the Go and Ninja versions? But those haven't been an issue in practice ...
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fn verify_fips_clang_version() -> (&'static str, &'static str) {
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fn version(tool: &str) -> String {
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let output = match Command::new(tool).arg("--version").output() {
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Ok(o) => o,
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Err(e) => {
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eprintln!("warning: missing {}, trying other compilers: {}", tool, e);
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// NOTE: hard-codes that the loop below checks the version
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return String::new();
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}
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};
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if !output.status.success() {
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return String::new();
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}
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let output = std::str::from_utf8(&output.stdout).expect("invalid utf8 output");
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output.lines().next().expect("empty output").to_string()
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}
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const REQUIRED_CLANG_VERSION: &str = "12.0.0";
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for (cc, cxx) in [
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("clang-12", "clang++-12"),
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("clang", "clang++"),
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("cc", "c++"),
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] {
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let cc_version = version(cc);
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if cc_version.contains(REQUIRED_CLANG_VERSION) {
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assert!(
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version(cxx).contains(REQUIRED_CLANG_VERSION),
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"mismatched versions of cc and c++"
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);
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return (cc, cxx);
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} else if cc == "cc" {
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panic!(
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"unsupported clang version \"{}\": FIPS requires clang {}",
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cc_version, REQUIRED_CLANG_VERSION
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);
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} else if !cc_version.is_empty() {
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eprintln!(
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"warning: FIPS requires clang version {}, skipping incompatible version \"{}\"",
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REQUIRED_CLANG_VERSION, cc_version
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);
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}
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}
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unreachable!()
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}
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fn pick_best_android_ndk_toolchain(toolchains_dir: &Path) -> std::io::Result<OsString> {
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let toolchains = std::fs::read_dir(toolchains_dir)?.collect::<Result<Vec<_>, _>>()?;
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// First look for one of the toolchains that Google has documented.
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// https://developer.android.com/ndk/guides/other_build_systems
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for known_toolchain in ["linux-x86_64", "darwin-x86_64", "windows-x86_64"] {
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if let Some(toolchain) = toolchains
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.iter()
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.find(|entry| entry.file_name() == known_toolchain)
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{
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return Ok(toolchain.file_name());
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}
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}
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// Then fall back to any subdirectory, in case Google has added support for a new host.
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// (Maybe there's a linux-aarch64 toolchain now.)
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if let Some(toolchain) = toolchains
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.into_iter()
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.find(|entry| entry.file_type().map(|ty| ty.is_dir()).unwrap_or(false))
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{
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return Ok(toolchain.file_name());
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}
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// Finally give up.
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Err(std::io::Error::new(
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std::io::ErrorKind::NotFound,
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"no subdirectories at given path",
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))
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}
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fn get_extra_clang_args_for_bindgen(config: &Config) -> Vec<String> {
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let mut params = Vec::new();
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// Add platform-specific parameters.
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#[allow(clippy::single_match)]
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match &*config.target_os {
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"ios" | "macos" => {
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// When cross-compiling for Apple targets, tell bindgen to use SDK sysroot,
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// and *don't* use system headers of the host macOS.
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let sdk = get_apple_sdk_name(config);
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let output = std::process::Command::new("xcrun")
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.args(["--show-sdk-path", "--sdk", sdk])
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.output()
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.unwrap();
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if !output.status.success() {
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if let Some(exit_code) = output.status.code() {
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eprintln!("xcrun failed: exit code {}", exit_code);
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} else {
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eprintln!("xcrun failed: killed");
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}
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std::io::stderr().write_all(&output.stderr).unwrap();
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// Uh... let's try anyway, I guess?
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return params;
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}
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let mut sysroot = String::from_utf8(output.stdout).unwrap();
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// There is typically a newline at the end which confuses clang.
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sysroot.truncate(sysroot.trim_end().len());
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params.push("-isysroot".to_string());
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params.push(sysroot);
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}
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"android" => {
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let mut android_sysroot = config
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.env
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.android_ndk_home
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.clone()
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.expect("Please set ANDROID_NDK_HOME for Android build");
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android_sysroot.extend(["toolchains", "llvm", "prebuilt"]);
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let toolchain = match pick_best_android_ndk_toolchain(&android_sysroot) {
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Ok(toolchain) => toolchain,
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Err(e) => {
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eprintln!(
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"warning: failed to find prebuilt Android NDK toolchain for bindgen: {}",
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e
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);
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// Uh... let's try anyway, I guess?
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return params;
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}
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};
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android_sysroot.push(toolchain);
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android_sysroot.push("sysroot");
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params.push("--sysroot".to_string());
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params.push(android_sysroot.into_os_string().into_string().unwrap());
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}
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_ => {}
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}
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params
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}
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fn ensure_patches_applied(config: &Config) -> io::Result<()> {
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let mut lock_file = LockFile::open(&config.out_dir.join(".patch_lock"))?;
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let src_path = get_boringssl_source_path(config);
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let has_git = src_path.join(".git").exists();
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lock_file.lock()?;
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// NOTE: init git in the copied files, so we can apply patches
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if !has_git {
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run_command(Command::new("git").arg("init").current_dir(src_path))?;
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}
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if config.features.pq_experimental {
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println!("cargo:warning=applying experimental post quantum crypto patch to boringssl");
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apply_patch(config, "boring-pq.patch")?;
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}
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if config.features.rpk {
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println!("cargo:warning=applying RPK patch to boringssl");
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apply_patch(config, "rpk.patch")?;
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}
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Ok(())
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}
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fn apply_patch(config: &Config, patch_name: &str) -> io::Result<()> {
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let src_path = get_boringssl_source_path(config);
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let cmd_path = config
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.manifest_dir
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.join("patches")
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.join(patch_name)
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.canonicalize()?;
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run_command(
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Command::new("git")
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.args(["apply", "-v", "--whitespace=fix"])
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.arg(cmd_path)
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.current_dir(src_path),
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)?;
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Ok(())
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}
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fn run_command(command: &mut Command) -> io::Result<Output> {
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let out = command.output()?;
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println!("{}", std::str::from_utf8(&out.stdout).unwrap());
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eprintln!("{}", std::str::from_utf8(&out.stderr).unwrap());
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if !out.status.success() {
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let err = match out.status.code() {
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Some(code) => format!("{:?} exited with status: {}", command, code),
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None => format!("{:?} was terminated by signal", command),
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};
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return Err(io::Error::new(io::ErrorKind::Other, err));
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}
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Ok(out)
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}
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fn built_boring_source_path(config: &Config) -> &PathBuf {
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if let Some(path) = &config.env.path {
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return path;
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}
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|
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static BUILD_SOURCE_PATH: OnceLock<PathBuf> = OnceLock::new();
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|
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BUILD_SOURCE_PATH.get_or_init(|| {
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if config.features.no_patches {
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println!(
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"cargo:warning=skipping git patches application, provided\
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native BoringSSL is expected to have the patches included"
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);
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} else {
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ensure_patches_applied(config).unwrap();
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}
|
|
|
|
let mut cfg = get_boringssl_cmake_config(config);
|
|
|
|
if config.features.fips {
|
|
let (clang, clangxx) = verify_fips_clang_version();
|
|
cfg.define("CMAKE_C_COMPILER", clang)
|
|
.define("CMAKE_CXX_COMPILER", clangxx)
|
|
.define("CMAKE_ASM_COMPILER", clang)
|
|
.define("FIPS", "1");
|
|
}
|
|
|
|
if config.features.fips_link_precompiled {
|
|
cfg.define("FIPS", "1");
|
|
}
|
|
|
|
cfg.build_target("ssl").build();
|
|
cfg.build_target("crypto").build()
|
|
})
|
|
}
|
|
|
|
fn link_in_precompiled_bcm_o(config: &Config) {
|
|
println!("cargo:warning=linking in precompiled `bcm.o` module");
|
|
|
|
let bssl_dir = built_boring_source_path(config);
|
|
let bcm_o_src_path = config.env.precompiled_bcm_o.as_ref()
|
|
.expect("`fips-link-precompiled` requires `BORING_BSSL_PRECOMPILED_BCM_O` env variable to be specified");
|
|
|
|
let libcrypto_path = bssl_dir
|
|
.join("build/crypto/libcrypto.a")
|
|
.canonicalize()
|
|
.unwrap();
|
|
|
|
let bcm_o_dst_path = bssl_dir.join("build/bcm-fips.o");
|
|
|
|
fs::copy(bcm_o_src_path, &bcm_o_dst_path).unwrap();
|
|
|
|
// check that fips module is named as expected
|
|
let out = run_command(
|
|
Command::new("ar")
|
|
.arg("t")
|
|
.arg(&libcrypto_path)
|
|
.arg("bcm.o"),
|
|
)
|
|
.unwrap();
|
|
|
|
assert_eq!(
|
|
String::from_utf8(out.stdout).unwrap().trim(),
|
|
"bcm.o",
|
|
"failed to verify FIPS module name"
|
|
);
|
|
|
|
// insert fips bcm.o before bcm.o into libcrypto.a,
|
|
// so for all duplicate symbols the older fips bcm.o is used
|
|
// (this causes the need for extra linker flags to deal with duplicate symbols)
|
|
// (as long as the newer module does not define new symbols, one may also remove it,
|
|
// but once there are new symbols it would cause missing symbols at linking stage)
|
|
run_command(
|
|
Command::new("ar")
|
|
.args(["rb", "bcm.o"])
|
|
.args([&libcrypto_path, &bcm_o_dst_path]),
|
|
)
|
|
.unwrap();
|
|
}
|
|
|
|
fn main() {
|
|
let config = Config::from_env();
|
|
let bssl_dir = built_boring_source_path(&config);
|
|
let build_path = get_boringssl_platform_output_path(&config);
|
|
|
|
if config.features.fips || config.features.fips_link_precompiled {
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/build/crypto/{}",
|
|
bssl_dir.display(),
|
|
build_path
|
|
);
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/build/ssl/{}",
|
|
bssl_dir.display(),
|
|
build_path
|
|
);
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/lib/{}",
|
|
bssl_dir.display(),
|
|
build_path
|
|
);
|
|
} else {
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/build/{}",
|
|
bssl_dir.display(),
|
|
build_path
|
|
);
|
|
}
|
|
|
|
if config.features.fips_link_precompiled {
|
|
link_in_precompiled_bcm_o(&config);
|
|
}
|
|
|
|
println!("cargo:rustc-link-lib=static=crypto");
|
|
println!("cargo:rustc-link-lib=static=ssl");
|
|
|
|
let include_path = config.env.include_path.clone().unwrap_or_else(|| {
|
|
if let Some(bssl_path) = &config.env.path {
|
|
return bssl_path.join("include");
|
|
}
|
|
|
|
let src_path = get_boringssl_source_path(&config);
|
|
let candidate = src_path.join("include");
|
|
|
|
if candidate.exists() {
|
|
candidate
|
|
} else {
|
|
src_path.join("src").join("include")
|
|
}
|
|
});
|
|
|
|
let mut builder = bindgen::Builder::default()
|
|
.derive_copy(true)
|
|
.derive_debug(true)
|
|
.derive_default(true)
|
|
.derive_eq(true)
|
|
.default_enum_style(bindgen::EnumVariation::NewType {
|
|
is_bitfield: false,
|
|
is_global: false,
|
|
})
|
|
.default_macro_constant_type(bindgen::MacroTypeVariation::Signed)
|
|
.generate_comments(true)
|
|
.fit_macro_constants(false)
|
|
.size_t_is_usize(true)
|
|
.layout_tests(true)
|
|
.prepend_enum_name(true)
|
|
.clang_args(get_extra_clang_args_for_bindgen(&config))
|
|
.clang_arg("-I")
|
|
.clang_arg(include_path.display().to_string());
|
|
|
|
match &*config.target {
|
|
// bindgen produces alignment tests that cause undefined behavior [1]
|
|
// when applied to explicitly unaligned types like OSUnalignedU64.
|
|
//
|
|
// There is no way to disable these tests for only some types
|
|
// and it's not nice to suppress warnings for the entire crate,
|
|
// so let's disable all alignment tests and hope for the best.
|
|
//
|
|
// [1]: https://github.com/rust-lang/rust-bindgen/issues/1651
|
|
"aarch64-apple-ios" | "aarch64-apple-ios-sim" => {
|
|
builder = builder.layout_tests(false);
|
|
}
|
|
_ => {}
|
|
}
|
|
|
|
let headers = [
|
|
"aes.h",
|
|
"asn1_mac.h",
|
|
"asn1t.h",
|
|
"blake2.h",
|
|
"blowfish.h",
|
|
"cast.h",
|
|
"chacha.h",
|
|
"cmac.h",
|
|
"cpu.h",
|
|
"curve25519.h",
|
|
"des.h",
|
|
"dtls1.h",
|
|
"hkdf.h",
|
|
"hmac.h",
|
|
"hrss.h",
|
|
"md4.h",
|
|
"md5.h",
|
|
"obj_mac.h",
|
|
"objects.h",
|
|
"opensslv.h",
|
|
"ossl_typ.h",
|
|
"pkcs12.h",
|
|
"poly1305.h",
|
|
"rand.h",
|
|
"rc4.h",
|
|
"ripemd.h",
|
|
"siphash.h",
|
|
"srtp.h",
|
|
"trust_token.h",
|
|
"x509v3.h",
|
|
];
|
|
for header in &headers {
|
|
builder = builder.header(include_path.join("openssl").join(header).to_str().unwrap());
|
|
}
|
|
|
|
let bindings = builder.generate().expect("Unable to generate bindings");
|
|
bindings
|
|
.write_to_file(config.out_dir.join("bindings.rs"))
|
|
.expect("Couldn't write bindings!");
|
|
}
|