A small, self-contained SHA256 and HMAC-SHA256 implementation (C) Frank Denis <fdenis [at] fastly [dot] com>, public domain

rust-hmac-sha256

A small, self-contained SHA256, HMAC-SHA256, and HKDF-SHA256 implementation in Rust.

Optional features:

• traits: enable support for the Digest trait from the digest crate.
• opt_size: enable size optimizations. Based on benchmarks, the .text section size is reduced by 75%, at the cost of approximately 16% performance.