lwaes_isa | A Lightweight ISA Extension

lwaes_isa is a C library. lwaes_isa has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A lightweight ISA extension proposal supporting:. A single instruction, SAES32 is used for encryption, decryption, and key schedule for both ciphers. For design rationale and some analysis, see the short report A Lightweight ISA Extension for AES and SM4 (to appear at SECRISC-V 2020). Note that there the same instruction is called "ENC1S". A more complex ISA extension is appropriate for higher-end CPUs. The primary goal of SAES32 / lweas is to eliminate timing-side vulnerabilities. Speed-up over pure software table-based implementations is roughly 500 %. NOTE After ENC1S proposal was adapted into the Crypto TG Draft as SAES32, I'm trying to keep this code up to date with it. There is also an initial emulation pseudocode for the 64-bit SAES64 instructions; no real assembler or HDL yet.