feat(sha2): use latest sha2-asm and enable M1 (#261)

Author: dignifiedquire

Cargo.lock

@@ -20,3 +20,6 @@ members = [
 
 [profile.dev]
 opt-level = 2
+
+[patch.crates-io]
+sha2-asm = { git = "https://github.com/RustCrypto/asm-hashes" }

Cargo.toml

@@ -19,7 +19,7 @@ digest = "0.9"
 block-buffer = "0.9"
 opaque-debug = "0.3"
 cfg-if = "1.0"
-sha2-asm = { version = "0.5", optional = true }
+sha2-asm = { version = "0.6", optional = true }
 
 [target.'cfg(any(target_arch = "x86", target_arch = "x86_64"))'.dependencies]
 cpuid-bool = "0.2"
@@ -38,3 +38,4 @@ asm = ["sha2-asm", "libc"]
 compress = [] # Expose compress function
 force-soft = [] # Force software implementation
 asm-aarch64 = ["asm"] # DEPRECATED: use `asm` instead
+

sha2/Cargo.toml

@@ -148,14 +148,12 @@ cfg_if::cfg_if! {
         #[cfg(feature = "asm")]
         mod soft {
             pub(crate) fn compress(state: &mut [u32; 8], blocks: &[[u8; 64]]) {
-                for block in blocks {
-                    sha2_asm::compress256(state, block);
-                }
+                sha2_asm::compress256(state, blocks);
             }
         }
         mod x86;
         use x86::compress;
-    } else if #[cfg(all(feature = "asm", target_arch = "aarch64", target_os = "linux"))] {
+    } else if #[cfg(all(feature = "asm", target_arch = "aarch64", any(target_os = "macos", target_os = "linux")))] {
         mod soft;
         mod aarch64;
         use aarch64::compress;

sha2/src/sha256.rs

@@ -1,18 +1,24 @@
-use libc::{getauxval, AT_HWCAP, HWCAP_SHA2};
-
+#[cfg(target_os = "linux")]
 #[inline(always)]
 pub fn sha2_supported() -> bool {
+    use libc::{getauxval, AT_HWCAP, HWCAP_SHA2};
+
     let hwcaps: u64 = unsafe { getauxval(AT_HWCAP) };
     (hwcaps & HWCAP_SHA2) != 0
 }
 
+#[cfg(target_os = "macos")]
+#[inline(always)]
+pub fn sha2_supported() -> bool {
+    // TODO: Use cpufeatures once support lands
+    true
+}
+
 pub fn compress(state: &mut [u32; 8], blocks: &[[u8; 64]]) {
     // TODO: Replace with https://github.com/rust-lang/rfcs/pull/2725
     // after stabilization
     if sha2_supported() {
-        for block in blocks {
-            sha2_asm::compress256(state, block);
-        }
+        sha2_asm::compress256(state, blocks);
     } else {
         super::soft::compress(state, blocks);
     }

sha2/src/sha256/aarch64.rs

@@ -233,9 +233,7 @@ cfg_if::cfg_if! {
         use soft::compress;
     } else if #[cfg(all(feature = "asm", any(target_arch = "x86", target_arch = "x86_64")))] {
         fn compress(state: &mut [u64; 8], blocks: &[[u8; 128]]) {
-            for block in blocks {
-                sha2_asm::compress512(state, block);
-            }
+            sha2_asm::compress512(state, blocks);
         }
     } else {
         mod soft;