1 files changed, 91 insertions, 0 deletions
diff --git a/Android.bp b/Android.bp
index 84c70c72..40acf086 100644
--- a/Android.bp
+++ b/Android.bp
@@ -566,3 +566,94 @@ cc_binary {
         "src/util/fipstools/test_fips.c",
     ],
 }
+
+// Rust bindings
+rust_bindgen {
+    name: "libbssl_sys_raw",
+    source_stem: "bindings",
+    crate_name: "bssl_sys_raw",
+    host_supported: true,
+    wrapper_src: "src/rust/wrapper.h",
+    vendor_available: true,
+    bindgen_flags: [
+        // Adapted from upstream the src/rust/CMakeLists.txt file at:
+        // https://boringssl.googlesource.com/boringssl/+/refs/heads/master/rust/CMakeLists.txt
+        "--no-derive-default",
+        "--enable-function-attribute-detection",
+        "--use-core",
+        "--size_t-is-usize",
+        "--default-macro-constant-type=signed",
+        "--rustified-enum=point_conversion_form_t",
+        // These are not BoringSSL symbols, they are from glibc
+        // and are not relevant to the build besides throwing warnings
+        // about their 'long double' (aka u128) not being FFI safe.
+        // We block those functions so that the build doesn't
+        // spam warnings.
+        //
+        // https://github.com/rust-lang/rust-bindgen/issues/1549 describes the current problem
+        // and other folks' solutions.
+        "--blocklist-function=strtold",
+        "--blocklist-function=qecvt",
+        "--blocklist-function=qecvt_r",
+        "--blocklist-function=qgcvt",
+        "--blocklist-function=qfcvt",
+        "--blocklist-function=qfcvt_r",
+    ],
+    shared_libs: [
+        "libcrypto",
+        "libssl",
+    ],
+}
+
+// Encapsulate the bindgen-generated layout tests as a test target.
+rust_test {
+    name: "libbssl_sys_raw_test",
+    srcs: [
+        ":libbssl_sys_raw",
+    ],
+    crate_name: "bssl_sys_raw_test",
+    test_suites: ["general-tests"],
+    auto_gen_config: true,
+    clippy_lints: "none",
+    lints: "none",
+}
+
+// Rust's bindgen doesn't cope with macros, so this target includes C functions that
+// do the same thing as macros defined in BoringSSL header files.
+cc_library_static {
+    name: "libbssl_rust_support",
+    host_supported: true,
+    defaults: ["boringssl_flags"],
+    srcs: ["src/rust/rust_wrapper.c"],
+    shared_libs: [
+        "libcrypto",
+        "libssl",
+    ],
+}
+
+// Replace the upstream CMake placeholder with a re-export of all of the local bindgen output.
+gensrcs {
+    name: "libbssl_sys_src",
+    srcs: ["src/rust/src/lib.rs"],
+    cmd: "sed 's@^.{INCLUDES}@pub use bssl_sys_raw::*;@' $(in) > $(out)",
+}
+
+rust_library {
+    name: "libbssl_ffi",
+    host_supported: true,
+    crate_name: "bssl_ffi",
+    visibility: [
+        "//external/rust/crates/openssl",
+        "//system/keymint/boringssl",
+        "//system/security/prng_seeder",
+    ],
+    // Use the modified source with placeholder replaced.
+    srcs: [":libbssl_sys_src"],
+    vendor_available: true,
+    // Since libbssl_sys_raw is not publically visible, we can't
+    // accidentally force a double-link by linking statically, so do so.
+    rlibs: ["libbssl_sys_raw"],
+    static_libs: [
+        "libbssl_rust_support",
+    ],
+}