Cryptogams SHA

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Jeffrey Walton

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May 19, 2019, 6:05:57 AM5/19/19

to Crypto++ Users

Hi Everyone,

We added Cryptogams code for ARM NEON for SHA1 and SHA256. Cryptogams is the repo maintained by Andy Polyakov. Also see https://github.com/dot-asm/cryptogams .

Andy's code is 30% to 50% faster than our C++ code. It is also faster then the code I was experimenting with. If interested, here are the steps to build Andy's code starting with the Perl sources: https://wiki.openssl.org/index.php/Cryptogams_SHA .

The code can be disabled by opening config_asm.h, and commenting out CRYPTOGAMS_ARM_SHA1 or CRYPTOGAMS_ARM_SHA256.

The cut-ins were tracked at https://github.com/weidai11/cryptopp/issues/837 (SHA1) and https://github.com/weidai11/cryptopp/issues/839 (SHA256).