Add re-exports for making inline functions available

This CL adds a re-export for `CBS_init` and
`CBS_len`, since these are declared as `OPENSSL_INLINE` and are
thus unavailable currently since inline support is not yet merged.
It also changes the existing wrappers for inline functions
to re-exports too.

Note: this is required to land the boringssl update in AOSP.

Test: m checkbuild
Change-Id: Ic6e2927d7a79b788a4ed0380cf27b3557b6f6f64
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/68327
Reviewed-by: David Benjamin <davidben@google.com>
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Commit-Queue: Ellen Arteca <emarteca@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

rust/bssl-sys/rust_wrapper.c

@@ -26,3 +26,11 @@ int ERR_GET_REASON_RUST(uint32_t packed_error) {
 int ERR_GET_FUNC_RUST(uint32_t packed_error) {
   return ERR_GET_FUNC(packed_error);
 }
+
+void CBS_init_RUST(CBS *cbs, const uint8_t *data, size_t len) {
+  CBS_init(cbs, data, len);
+}
+
+size_t CBS_len_RUST(const CBS *cbs) {
+  return CBS_len(cbs);
+}

rust/bssl-sys/rust_wrapper.h

@@ -16,6 +16,7 @@
 #define OPENSSL_HEADER_RUST_WRAPPER_H
 
 #include <openssl/err.h>
+#include <openssl/bytestring.h>
 
 #if defined(__cplusplus)
 extern "C" {
@@ -30,7 +31,8 @@ extern "C" {
 int ERR_GET_LIB_RUST(uint32_t packed_error);
 int ERR_GET_REASON_RUST(uint32_t packed_error);
 int ERR_GET_FUNC_RUST(uint32_t packed_error);
-
+void CBS_init_RUST(CBS *cbs, const uint8_t *data, size_t len);
+size_t CBS_len_RUST(const CBS *cbs);
 
 #if defined(__cplusplus)
 }  // extern C

rust/bssl-sys/src/lib.rs

@@ -48,22 +48,11 @@ pub const XN_FLAG_ONELINE: c_ulong = bindgen::XN_FLAG_ONELINE as c_ulong;
 
 // TODO(crbug.com/boringssl/596): Remove these wrappers.
 #[cfg(unsupported_inline_wrappers)]
-pub fn ERR_GET_LIB(packed_error: u32) -> i32 {
-    // Safety: This is safe for all inputs. bindgen conservatively marks everything unsafe.
-    unsafe { ERR_GET_LIB_RUST(packed_error) }
-}
-
-#[cfg(unsupported_inline_wrappers)]
-pub fn ERR_GET_REASON(packed_error: u32) -> i32 {
-    // Safety: This is safe for all inputs. bindgen conservatively marks everything unsafe.
-    unsafe { ERR_GET_REASON_RUST(packed_error) }
-}
-
-#[cfg(unsupported_inline_wrappers)]
-pub fn ERR_GET_FUNC(packed_error: u32) -> i32 {
-    // Safety: This is safe for all inputs. bindgen conservatively marks everything unsafe.
-    unsafe { ERR_GET_FUNC_RUST(packed_error) }
-}
+pub use { ERR_GET_LIB_RUST as ERR_GET_LIB,
+          ERR_GET_REASON_RUST as ERR_GET_REASON,
+          ERR_GET_FUNC_RUST as ERR_GET_FUNC,
+          CBS_init_RUST as CBS_init,
+          CBS_len_RUST as CBS_len };
 
 pub fn init() {
     // Safety: `CRYPTO_library_init` may be called multiple times and concurrently.