sha2: RISC-V scalar crypto extension support - Githubissues

RustCrypto / hashes

Collection of cryptographic hash functions written in pure Rust

1.89k stars 256 forks source link

sha2: RISC-V scalar crypto extension support #614

Closed newpavlov closed 3 months ago

newpavlov commented 3 months ago

The support is Nightly-only and requires to enable the sha2_backend configuration flag with a value equal to riscv-zknh or riscv-zknh-compact.

The resulting assembly and binary size of the compress function (not counting the statics with round constants):

SHA-256, unrolled: https://rust.godbolt.org/z/177bqKd3h (5280 bytes)
SHA-256, compact: https://rust.godbolt.org/z/Kzx59bsdP (1308 bytes)
SHA-512, unrolled: https://rust.godbolt.org/z/ExqqrfE1r (7964 bytes)
SHA-512: compact: https://rust.godbolt.org/z/z41v6d4do (2852 bytes)