Module sha_ni 

Intel SHA Extensions (SHA-NI) optimized SHA256

This module provides hardware-accelerated SHA256 using Intel SHA Extensions. Optimized for single-hash and small-batch operations.

Performance

• Expected: 10-15x faster than sha2 crate for single hashes
• Uses dedicated SHA256 hardware instructions
• Low latency, optimized for single-hash speed

CPU Support

• Intel: Ice Lake (2019+), all newer generations
• AMD: All Ryzen (Zen microarchitecture, 2017+)

Reference

Based on Intel’s SHA-NI reference implementation and the reference sha256_shani.cpp

Functions

hash256

Double SHA256 (SHA256D) using SHA-NI

is_sha_ni_available

Check if SHA-NI is available at runtime

sha256

Public API: Single SHA256 with automatic dispatch