716 lines
24 KiB
Rust
716 lines
24 KiB
Rust
use fslock::LockFile;
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use std::env;
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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::Once;
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// NOTE: this build script is adopted from quiche (https://github.com/cloudflare/quiche)
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// Additional parameters for Android build of BoringSSL.
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//
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// Android NDK < 18 with GCC.
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const CMAKE_PARAMS_ANDROID_NDK_OLD_GCC: &[(&str, &[(&str, &str)])] = &[
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(
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"aarch64",
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&[("ANDROID_TOOLCHAIN_NAME", "aarch64-linux-android-4.9")],
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),
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(
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"arm",
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&[("ANDROID_TOOLCHAIN_NAME", "arm-linux-androideabi-4.9")],
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),
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(
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"x86",
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&[("ANDROID_TOOLCHAIN_NAME", "x86-linux-android-4.9")],
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),
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(
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"x86_64",
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&[("ANDROID_TOOLCHAIN_NAME", "x86_64-linux-android-4.9")],
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),
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];
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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() -> &'static [(&'static str, &'static str)] {
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let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
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let cmake_params_android = if cfg!(feature = "ndk-old-gcc") {
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CMAKE_PARAMS_ANDROID_NDK_OLD_GCC
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} else {
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CMAKE_PARAMS_ANDROID_NDK
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};
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for (android_arch, params) in cmake_params_android {
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if *android_arch == 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() -> &'static [(&'static str, &'static str)] {
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let target = env::var("TARGET").unwrap();
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for (next_target, params) in CMAKE_PARAMS_APPLE {
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if *next_target == 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() -> &'static str {
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for (name, value) in cmake_params_apple() {
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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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let target = env::var("TARGET").unwrap();
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panic!("cannot find SDK for {} in CMAKE_PARAMS_APPLE", target);
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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() -> String {
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#[cfg(all(feature = "fips", not(feature = "fips-link-precompiled")))]
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const SUBMODULE_DIR: &str = "boringssl-fips";
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#[cfg(any(not(feature = "fips"), feature = "fips-link-precompiled"))]
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const SUBMODULE_DIR: &str = "boringssl";
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static COPY_SOURCES: Once = Once::new();
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if let Ok(src_path) = env::var("BORING_BSSL_SOURCE_PATH") {
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return src_path;
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}
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let out_dir = env::var("OUT_DIR").unwrap();
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let src_path = Path::new(&out_dir).join(SUBMODULE_DIR);
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COPY_SOURCES.call_once(|| {
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let submodule_path = Path::new(env!("CARGO_MANIFEST_DIR"))
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.join("deps")
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.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(Command::new("git").args([
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"submodule",
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"update",
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"--init",
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"--recursive",
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&submodule_path.display().to_string(),
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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, &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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});
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src_path.display().to_string()
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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() -> String {
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if cfg!(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 = env::var("DEBUG").expect("DEBUG variable not defined in env");
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let deb_info = match &debug_env_var[..] {
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"false" => false,
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"true" => true,
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unknown => panic!("Unknown DEBUG={} env var.", unknown),
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};
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let opt_env_var = env::var("OPT_LEVEL").expect("OPT_LEVEL variable not defined in env");
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let subdir = match &opt_env_var[..] {
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"0" => "Debug",
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"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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"s" | "z" => "MinSizeRel",
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unknown => panic!("Unknown OPT_LEVEL={} env var.", unknown),
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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() -> cmake::Config {
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let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
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let os = env::var("CARGO_CFG_TARGET_OS").unwrap();
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let host = env::var("HOST").unwrap();
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let target = env::var("TARGET").unwrap();
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let pwd = std::env::current_dir().unwrap();
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let src_path = get_boringssl_source_path();
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let mut boringssl_cmake = cmake::Config::new(&src_path);
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if host != target {
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// Add platform-specific parameters for cross-compilation.
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match os.as_ref() {
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"android" => {
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// We need ANDROID_NDK_HOME to be set properly.
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println!("cargo:rerun-if-env-changed=ANDROID_NDK_HOME");
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let android_ndk_home = env::var("ANDROID_NDK_HOME")
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.expect("Please set ANDROID_NDK_HOME for Android build");
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let android_ndk_home = std::path::Path::new(&android_ndk_home);
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for (name, value) in cmake_params_android() {
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eprintln!("android arch={} add {}={}", 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() {
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eprintln!("macos arch={} add {}={}", 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() {
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eprintln!("ios arch={} add {}={}", 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 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 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 arch.as_str() {
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"x86" => {
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boringssl_cmake.define(
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"CMAKE_TOOLCHAIN_FILE",
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pwd.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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pwd.join("cmake/aarch64-linux.cmake").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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pwd.join("cmake/armv7-linux.cmake").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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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() -> Vec<String> {
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let os = env::var("CARGO_CFG_TARGET_OS").unwrap();
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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 os.as_ref() {
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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();
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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 android_ndk_home = env::var("ANDROID_NDK_HOME")
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.expect("Please set ANDROID_NDK_HOME for Android build");
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let mut android_sysroot = std::path::PathBuf::from(android_ndk_home);
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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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// If ANDROID_NDK_HOME weren't a valid UTF-8 string,
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// we'd already know from env::var.
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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() -> io::Result<()> {
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let out_dir = env::var("OUT_DIR").unwrap();
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let mut lock_file = LockFile::open(&PathBuf::from(&out_dir).join(".patch_lock"))?;
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let src_path = get_boringssl_source_path();
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let has_git = Path::new(&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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println!("cargo:warning=initing git in boringssl sources to apply patches");
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run_command(Command::new("git").args(["init"]).current_dir(&src_path))?;
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}
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if cfg!(feature = "pq-experimental") {
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println!("cargo:warning=applying experimental post quantum crypto patch to boringssl");
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apply_patch("boring-pq.patch")?;
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}
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if cfg!(feature = "rpk") {
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println!("cargo:warning=applying RPK patch to boringssl");
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apply_patch("rpk.patch")?;
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}
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Ok(())
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}
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fn apply_patch(patch_name: &str) -> io::Result<()> {
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let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
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let src_path = get_boringssl_source_path();
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let cmd_path = 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")
|
|
.args([
|
|
"apply",
|
|
"-v",
|
|
"--whitespace=fix",
|
|
&cmd_path.display().to_string(),
|
|
])
|
|
.current_dir(src_path),
|
|
)?;
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn run_command(command: &mut Command) -> io::Result<Output> {
|
|
let out = command.output()?;
|
|
|
|
println!("{}", std::str::from_utf8(&out.stdout).unwrap());
|
|
eprintln!("{}", std::str::from_utf8(&out.stderr).unwrap());
|
|
|
|
if !out.status.success() {
|
|
let err = match out.status.code() {
|
|
Some(code) => format!("{:?} exited with status: {}", command, code),
|
|
None => format!("{:?} was terminated by signal", command),
|
|
};
|
|
|
|
return Err(io::Error::new(io::ErrorKind::Other, err));
|
|
}
|
|
|
|
Ok(out)
|
|
}
|
|
|
|
fn build_boring_from_sources() -> String {
|
|
ensure_patches_applied().unwrap();
|
|
|
|
let mut cfg = get_boringssl_cmake_config();
|
|
|
|
if cfg!(feature = "fuzzing") {
|
|
cfg.cxxflag("-DBORINGSSL_UNSAFE_DETERMINISTIC_MODE")
|
|
.cxxflag("-DBORINGSSL_UNSAFE_FUZZER_MODE");
|
|
}
|
|
|
|
if cfg!(all(
|
|
feature = "fips",
|
|
not(feature = "fips-link-precompiled")
|
|
)) {
|
|
let (clang, clangxx) = verify_fips_clang_version();
|
|
cfg.define("CMAKE_C_COMPILER", clang);
|
|
cfg.define("CMAKE_CXX_COMPILER", clangxx);
|
|
cfg.define("CMAKE_ASM_COMPILER", clang);
|
|
cfg.define("FIPS", "1");
|
|
}
|
|
|
|
if cfg!(feature = "fips-link-precompiled") {
|
|
cfg.define("FIPS", "1");
|
|
}
|
|
|
|
cfg.build_target("ssl").build();
|
|
cfg.build_target("crypto").build().display().to_string()
|
|
}
|
|
|
|
fn link_in_precompiled_bcm_o(bssl_dir: &str) {
|
|
println!("cargo:warning=linking in precompiled `bcm.o` module");
|
|
|
|
let bcm_o_src_path = env::var("BORING_SSL_PRECOMPILED_BCM_O")
|
|
.expect("`fips-link-precompiled` requires `BORING_SSL_PRECOMPILED_BCM_O` env variable to be specified");
|
|
|
|
let libcrypto_path = PathBuf::from(bssl_dir)
|
|
.join("build/crypto/libcrypto.a")
|
|
.canonicalize()
|
|
.unwrap()
|
|
.display()
|
|
.to_string();
|
|
|
|
let bcm_o_dst_path = PathBuf::from(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").args(["t", &libcrypto_path, "bcm.o"])).unwrap();
|
|
|
|
assert_eq!(
|
|
String::from_utf8(out.stdout).unwrap(),
|
|
"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",
|
|
&libcrypto_path,
|
|
bcm_o_dst_path.display().to_string().as_str(),
|
|
]))
|
|
.unwrap();
|
|
}
|
|
|
|
fn main() {
|
|
println!("cargo:rerun-if-env-changed=BORING_BSSL_PATH");
|
|
|
|
#[cfg(all(feature = "fips", feature = "rpk"))]
|
|
compile_error!("`fips` and `rpk` features are mutually exclusive");
|
|
|
|
let bssl_dir = env::var("BORING_BSSL_PATH");
|
|
|
|
if bssl_dir.is_ok() && cfg!(any(feature = "rpk", feature = "pq-experimental")) {
|
|
panic!("precompiled BoringSSL was provided, optional patches can't be applied to it");
|
|
}
|
|
|
|
if bssl_dir.is_ok() && cfg!(feature = "fips") {
|
|
panic!("precompiled BoringSSL was provided, so FIPS configuration can't be applied");
|
|
}
|
|
|
|
let bssl_dir = bssl_dir.unwrap_or_else(|_| build_boring_from_sources());
|
|
|
|
let build_path = get_boringssl_platform_output_path();
|
|
|
|
if cfg!(feature = "fips") {
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/build/crypto/{}",
|
|
bssl_dir, build_path
|
|
);
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/build/ssl/{}",
|
|
bssl_dir, build_path
|
|
);
|
|
} else {
|
|
println!(
|
|
"cargo:rustc-link-search=native={}/build/{}",
|
|
bssl_dir, build_path
|
|
);
|
|
}
|
|
|
|
if cfg!(feature = "fips-link-precompiled") {
|
|
link_in_precompiled_bcm_o(&bssl_dir);
|
|
}
|
|
|
|
println!("cargo:rustc-link-lib=static=crypto");
|
|
println!("cargo:rustc-link-lib=static=ssl");
|
|
|
|
println!("cargo:rerun-if-env-changed=BORING_BSSL_INCLUDE_PATH");
|
|
let include_path = env::var("BORING_BSSL_INCLUDE_PATH").unwrap_or_else(|_| {
|
|
let src_path = get_boringssl_source_path();
|
|
if cfg!(feature = "fips") {
|
|
format!("{}/include", &src_path)
|
|
} else {
|
|
format!("{}/src/include", &src_path)
|
|
}
|
|
});
|
|
|
|
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())
|
|
.clang_args(&["-I", &include_path]);
|
|
|
|
let target = env::var("TARGET").unwrap();
|
|
match target.as_ref() {
|
|
// 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",
|
|
"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(
|
|
Path::new(&include_path)
|
|
.join("openssl")
|
|
.join(header)
|
|
.to_str()
|
|
.unwrap(),
|
|
);
|
|
}
|
|
|
|
let bindings = builder.generate().expect("Unable to generate bindings");
|
|
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
|
|
bindings
|
|
.write_to_file(out_path.join("bindings.rs"))
|
|
.expect("Couldn't write bindings!");
|
|
}
|