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Date:   Fri, 24 May 2019 18:22:59 -0700
From:   Eric Biggers <ebiggers@kernel.org>
To:     Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc:     Pascal Van Leeuwen <pvanleeuwen@insidesecure.com>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
Subject: Re: another testmgr question
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On Fri, May 24, 2019 at 11:25:52AM +0200, Ard Biesheuvel wrote:
> 
> All userland clients of the in-kernel crypto use it specifically to
> access h/w accelerators, given that software crypto doesn't require
> the higher privilege level (no point in issuing those AES CPU
> instructions from the kernel if you can issue them in your program
> directly)

Unfortunately people also use AF_ALG because they're too lazy to use a userspace
crypto library, e.g. systemd uses it for HMAC-SHA256, and iproute2 uses it for
SHA-1.

- Eric