CVS commit: src/sys/crypto/chacha

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Mon Jul 27 20:49:10 UTC 2020

Modified Files:
        src/sys/crypto/chacha: chacha_impl.c

Log Message:
Simplify ChaCha selection and allow it to be used much earlier.

This way we can use it for cprng_fast early on.  ChaCha is easy
because there's no data formats that must be preserved from call to
call but vary from implementation to implementation -- we could even
make it a sysctl knob to dynamically select it with negligible cost.

(In contrast, different AES implementations use different expanded
key formats which must be preserved from aes_setenckey to aes_enc,
for example, which means a considerably greater burden on dynamic
selection that's not really worth it.)


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/crypto/chacha/chacha_impl.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.