K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2021-04-27T19:16:35.102891Z
K 7
svn:log
V 556
aesni: Avoid modifying session keys in hmac_update()

Otherwise aesni_process() is not thread-safe for AES+SHA-HMAC
transforms, since hmac_update() updates the caller-supplied key directly
to create the derived key.  Use a buffer on the stack to store a copy of
the key used for computing inner and outer digests.

This is a direct commit to stable/12 as the bug is not present in later
branches.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D30001

Git Hash:   62e32cf9140e6c13663dcd69ec3b3c7ca4579782
Git Author: markj@FreeBSD.org
END