chore(sdk): enable asm optimizations for sha2 on aarch64 (#1350)

Co-authored-by: Dylan Ross <[email protected]>

Author: dyro

Cargo.lock

@@ -177,7 +177,6 @@ serde_json = { version = "1.0.117", features = ["preserve_order"] }
 serde_with = "3.11.0"
 serde-transcode = "1.1.1"
 sha1 = "0.10.6"
-sha2 = "0.10.6"
 spki = { version = "0.7.3", optional = true }
 static-iref = "3.0"
 tempfile = "=3.15.0"
@@ -191,6 +190,19 @@ x509-parser = "0.16.0"
 zeroize = { version = "1.8", features = ["zeroize_derive"] }
 zip = { version = "3.0.0", default-features = false }
 
+# Use the asm feature of sha2 on aarch64 for better performance. This nearly
+# halves hashing time for large assets (> 50gb mp4, for example).
+#
+# Note: This feature has been removed in later versions of sha2.
+# If upgrading, ensure sha2 has implemented equivalent optimizations for aarch64.
+#
+# See: https://github.com/RustCrypto/hashes/pull/542 and
+# https://github.com/RustCrypto/hashes/tree/master/sha2#backends (which hasn't been released yet).
+[target.'cfg(target_arch = "aarch64")'.dependencies]
+sha2 = { version = "0.10.6", features = ["asm"] }
+[target.'cfg(not(target_arch = "aarch64"))'.dependencies]
+sha2 = "0.10.6"
+
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 const-oid = "0.9.6"
 der = "0.7.9"