diff options
Diffstat (limited to 'vendor/openssl-sys/build/main.rs')
| -rw-r--r-- | vendor/openssl-sys/build/main.rs | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/vendor/openssl-sys/build/main.rs b/vendor/openssl-sys/build/main.rs new file mode 100644 index 0000000..dd18521 --- /dev/null +++ b/vendor/openssl-sys/build/main.rs @@ -0,0 +1,400 @@ +#[cfg(feature = "bindgen")] +extern crate bindgen; +extern crate cc; +#[cfg(feature = "vendored")] +extern crate openssl_src; +extern crate pkg_config; +extern crate vcpkg; + +use std::collections::HashSet; +use std::env; +use std::ffi::OsString; +use std::path::{Path, PathBuf}; +mod cfgs; + +mod find_normal; +mod run_bindgen; + +#[derive(PartialEq)] +enum Version { + Openssl3xx, + Openssl11x, + Openssl10x, + Libressl, + Boringssl, +} + +fn env_inner(name: &str) -> Option<OsString> { + let var = env::var_os(name); + println!("cargo:rerun-if-env-changed={}", name); + + match var { + Some(ref v) => println!("{} = {}", name, v.to_string_lossy()), + None => println!("{} unset", name), + } + + var +} + +fn env(name: &str) -> Option<OsString> { + let prefix = env::var("TARGET").unwrap().to_uppercase().replace('-', "_"); + let prefixed = format!("{}_{}", prefix, name); + env_inner(&prefixed).or_else(|| env_inner(name)) +} + +fn find_openssl(target: &str) -> (Vec<PathBuf>, PathBuf) { + find_normal::get_openssl(target) +} + +fn check_ssl_kind() { + if cfg!(feature = "unstable_boringssl") { + println!("cargo:rustc-cfg=boringssl"); + println!("cargo:boringssl=true"); + // BoringSSL does not have any build logic, exit early + std::process::exit(0); + } +} + +fn main() { + check_ssl_kind(); + + let target = env::var("TARGET").unwrap(); + + let (lib_dirs, include_dir) = find_openssl(&target); + + if !lib_dirs.iter().all(|p| Path::new(p).exists()) { + panic!("OpenSSL library directory does not exist: {:?}", lib_dirs); + } + if !Path::new(&include_dir).exists() { + panic!( + "OpenSSL include directory does not exist: {}", + include_dir.to_string_lossy() + ); + } + + for lib_dir in lib_dirs.iter() { + println!( + "cargo:rustc-link-search=native={}", + lib_dir.to_string_lossy() + ); + } + println!("cargo:include={}", include_dir.to_string_lossy()); + + let version = postprocess(&[include_dir]); + + let libs_env = env("OPENSSL_LIBS"); + let libs = match libs_env.as_ref().and_then(|s| s.to_str()) { + Some(v) => { + if v.is_empty() { + vec![] + } else { + v.split(':').collect() + } + } + None => match version { + Version::Openssl10x if target.contains("windows") => vec!["ssleay32", "libeay32"], + Version::Openssl3xx | Version::Openssl11x if target.contains("windows-msvc") => { + vec!["libssl", "libcrypto"] + } + _ => vec!["ssl", "crypto"], + }, + }; + + let kind = determine_mode(&lib_dirs, &libs); + for lib in libs.into_iter() { + println!("cargo:rustc-link-lib={}={}", kind, lib); + } + + // https://github.com/openssl/openssl/pull/15086 + if version == Version::Openssl3xx + && kind == "static" + && (env::var("CARGO_CFG_TARGET_OS").unwrap() == "linux" + || env::var("CARGO_CFG_TARGET_OS").unwrap() == "android") + && env::var("CARGO_CFG_TARGET_POINTER_WIDTH").unwrap() == "32" + { + println!("cargo:rustc-link-lib=dylib=atomic"); + } + + if kind == "static" && target.contains("windows") { + println!("cargo:rustc-link-lib=dylib=gdi32"); + println!("cargo:rustc-link-lib=dylib=user32"); + println!("cargo:rustc-link-lib=dylib=crypt32"); + println!("cargo:rustc-link-lib=dylib=ws2_32"); + println!("cargo:rustc-link-lib=dylib=advapi32"); + } +} + +fn postprocess(include_dirs: &[PathBuf]) -> Version { + let version = validate_headers(include_dirs); + + // Never run bindgen for BoringSSL, if it was needed we already ran it. + if version != Version::Boringssl { + #[cfg(feature = "bindgen")] + run_bindgen::run(&include_dirs); + } + + version +} + +/// Validates the header files found in `include_dir` and then returns the +/// version string of OpenSSL. +#[allow(clippy::unusual_byte_groupings)] +fn validate_headers(include_dirs: &[PathBuf]) -> Version { + // This `*-sys` crate only works with OpenSSL 1.0.1, 1.0.2, 1.1.0, 1.1.1 and 3.0.0. + // To correctly expose the right API from this crate, take a look at + // `opensslv.h` to see what version OpenSSL claims to be. + // + // OpenSSL has a number of build-time configuration options which affect + // various structs and such. Since OpenSSL 1.1.0 this isn't really a problem + // as the library is much more FFI-friendly, but 1.0.{1,2} suffer this problem. + // + // To handle all this conditional compilation we slurp up the configuration + // file of OpenSSL, `opensslconf.h`, and then dump out everything it defines + // as our own #[cfg] directives. That way the `ossl10x.rs` bindings can + // account for compile differences and such. + println!("cargo:rerun-if-changed=build/expando.c"); + let mut gcc = cc::Build::new(); + gcc.includes(include_dirs); + let expanded = match gcc.file("build/expando.c").try_expand() { + Ok(expanded) => expanded, + Err(e) => { + panic!( + " +Header expansion error: +{:?} + +Failed to find OpenSSL development headers. + +You can try fixing this setting the `OPENSSL_DIR` environment variable +pointing to your OpenSSL installation or installing OpenSSL headers package +specific to your distribution: + + # On Ubuntu + sudo apt-get install libssl-dev + # On Arch Linux + sudo pacman -S openssl + # On Fedora + sudo dnf install openssl-devel + # On Alpine Linux + apk add openssl-dev + +See rust-openssl documentation for more information: + + https://docs.rs/openssl +", + e + ); + } + }; + let expanded = String::from_utf8(expanded).unwrap(); + + let mut enabled = vec![]; + let mut openssl_version = None; + let mut libressl_version = None; + let mut is_boringssl = false; + for line in expanded.lines() { + let line = line.trim(); + + let openssl_prefix = "RUST_VERSION_OPENSSL_"; + let new_openssl_prefix = "RUST_VERSION_NEW_OPENSSL_"; + let libressl_prefix = "RUST_VERSION_LIBRESSL_"; + let boringsl_prefix = "RUST_OPENSSL_IS_BORINGSSL"; + let conf_prefix = "RUST_CONF_"; + if let Some(version) = line.strip_prefix(openssl_prefix) { + openssl_version = Some(parse_version(version)); + } else if let Some(version) = line.strip_prefix(new_openssl_prefix) { + openssl_version = Some(parse_new_version(version)); + } else if let Some(version) = line.strip_prefix(libressl_prefix) { + libressl_version = Some(parse_version(version)); + } else if let Some(conf) = line.strip_prefix(conf_prefix) { + enabled.push(conf); + } else if line.starts_with(boringsl_prefix) { + is_boringssl = true; + } + } + + if is_boringssl { + println!("cargo:rustc-cfg=boringssl"); + println!("cargo:boringssl=true"); + run_bindgen::run_boringssl(include_dirs); + return Version::Boringssl; + } + + // We set this for any non-BoringSSL lib. + println!("cargo:rustc-cfg=openssl"); + + for enabled in &enabled { + println!("cargo:rustc-cfg=osslconf=\"{}\"", enabled); + } + println!("cargo:conf={}", enabled.join(",")); + + for cfg in cfgs::get(openssl_version, libressl_version) { + println!("cargo:rustc-cfg={}", cfg); + } + + if let Some(libressl_version) = libressl_version { + println!("cargo:libressl_version_number={:x}", libressl_version); + + let major = (libressl_version >> 28) as u8; + let minor = (libressl_version >> 20) as u8; + let fix = (libressl_version >> 12) as u8; + let (major, minor, fix) = match (major, minor, fix) { + (2, 5, 0) => ('2', '5', '0'), + (2, 5, 1) => ('2', '5', '1'), + (2, 5, 2) => ('2', '5', '2'), + (2, 5, _) => ('2', '5', 'x'), + (2, 6, 0) => ('2', '6', '0'), + (2, 6, 1) => ('2', '6', '1'), + (2, 6, 2) => ('2', '6', '2'), + (2, 6, _) => ('2', '6', 'x'), + (2, 7, _) => ('2', '7', 'x'), + (2, 8, 0) => ('2', '8', '0'), + (2, 8, 1) => ('2', '8', '1'), + (2, 8, _) => ('2', '8', 'x'), + (2, 9, 0) => ('2', '9', '0'), + (2, 9, _) => ('2', '9', 'x'), + (3, 0, 0) => ('3', '0', '0'), + (3, 0, 1) => ('3', '0', '1'), + (3, 0, _) => ('3', '0', 'x'), + (3, 1, 0) => ('3', '1', '0'), + (3, 1, _) => ('3', '1', 'x'), + (3, 2, 0) => ('3', '2', '0'), + (3, 2, 1) => ('3', '2', '1'), + (3, 2, _) => ('3', '2', 'x'), + (3, 3, 0) => ('3', '3', '0'), + (3, 3, 1) => ('3', '3', '1'), + (3, 3, _) => ('3', '3', 'x'), + (3, 4, 0) => ('3', '4', '0'), + (3, 4, _) => ('3', '4', 'x'), + (3, 5, _) => ('3', '5', 'x'), + (3, 6, 0) => ('3', '6', '0'), + (3, 6, _) => ('3', '6', 'x'), + (3, 7, 0) => ('3', '7', '0'), + (3, 7, 1) => ('3', '7', '1'), + (3, 7, _) => ('3', '7', 'x'), + (3, 8, 0) => ('3', '8', '0'), + (3, 8, 1) => ('3', '8', '1'), + _ => version_error(), + }; + + println!("cargo:libressl=true"); + println!("cargo:libressl_version={}{}{}", major, minor, fix); + println!("cargo:version=101"); + Version::Libressl + } else { + let openssl_version = openssl_version.unwrap(); + println!("cargo:version_number={:x}", openssl_version); + + if openssl_version >= 0x4_00_00_00_0 { + version_error() + } else if openssl_version >= 0x3_00_00_00_0 { + Version::Openssl3xx + } else if openssl_version >= 0x1_01_01_00_0 { + println!("cargo:version=111"); + Version::Openssl11x + } else if openssl_version >= 0x1_01_00_06_0 { + println!("cargo:version=110"); + println!("cargo:patch=f"); + Version::Openssl11x + } else if openssl_version >= 0x1_01_00_00_0 { + println!("cargo:version=110"); + Version::Openssl11x + } else if openssl_version >= 0x1_00_02_00_0 { + println!("cargo:version=102"); + Version::Openssl10x + } else if openssl_version >= 0x1_00_01_00_0 { + println!("cargo:version=101"); + Version::Openssl10x + } else { + version_error() + } + } +} + +fn version_error() -> ! { + panic!( + " + +This crate is only compatible with OpenSSL (version 1.0.1 through 1.1.1, or 3), or LibreSSL 2.5 +through 3.8.1, but a different version of OpenSSL was found. The build is now aborting +due to this version mismatch. + +" + ); +} + +// parses a string that looks like "0x100020cfL" +fn parse_version(version: &str) -> u64 { + // cut off the 0x prefix + assert!(version.starts_with("0x")); + let version = &version[2..]; + + // and the type specifier suffix + let version = version.trim_end_matches(|c: char| !c.is_ascii_hexdigit()); + + u64::from_str_radix(version, 16).unwrap() +} + +// parses a string that looks like 3_0_0 +fn parse_new_version(version: &str) -> u64 { + println!("version: {}", version); + let mut it = version.split('_'); + let major = it.next().unwrap().parse::<u64>().unwrap(); + let minor = it.next().unwrap().parse::<u64>().unwrap(); + let patch = it.next().unwrap().parse::<u64>().unwrap(); + + (major << 28) | (minor << 20) | (patch << 4) +} + +/// Given a libdir for OpenSSL (where artifacts are located) as well as the name +/// of the libraries we're linking to, figure out whether we should link them +/// statically or dynamically. +fn determine_mode(libdirs: &[PathBuf], libs: &[&str]) -> &'static str { + // First see if a mode was explicitly requested + let kind = env("OPENSSL_STATIC"); + match kind.as_ref().and_then(|s| s.to_str()) { + Some("0") => return "dylib", + Some(_) => return "static", + None => {} + } + + // Next, see what files we actually have to link against, and see what our + // possibilities even are. + let mut files = HashSet::new(); + for dir in libdirs { + for path in dir + .read_dir() + .unwrap() + .map(|e| e.unwrap()) + .map(|e| e.file_name()) + .filter_map(|e| e.into_string().ok()) + { + files.insert(path); + } + } + let can_static = libs + .iter() + .all(|l| files.contains(&format!("lib{}.a", l)) || files.contains(&format!("{}.lib", l))); + let can_dylib = libs.iter().all(|l| { + files.contains(&format!("lib{}.so", l)) + || files.contains(&format!("{}.dll", l)) + || files.contains(&format!("lib{}.dylib", l)) + }); + match (can_static, can_dylib) { + (true, false) => return "static", + (false, true) => return "dylib", + (false, false) => { + panic!( + "OpenSSL libdir at `{:?}` does not contain the required files \ + to either statically or dynamically link OpenSSL", + libdirs + ); + } + (true, true) => {} + } + + // Ok, we've got not explicit preference and can *either* link statically or + // link dynamically. In the interest of "security upgrades" and/or "best + // practices with security libs", let's link dynamically. + "dylib" +} |