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Re: New function: consttime_memcmp(3)
Date: Mon, 16 Mar 2015 08:54:17 +0100
From: "Kamil Rytarowski" <n54%gmx.com@localhost>
Taylor R Campbell wrote:
> Date: Mon, 16 Mar 2015 01:58:19 +0100
> From: "Kamil Rytarowski" <n54%gmx.com@localhost>
> I'm attaching a patch against current adding a new libc and
> kernel function: consttime_memcmp(3). The code is borrowed
> from OpenBSD timingsafe_memcmp(3) .
> Why? What do you want to use this for?
My personal use-case is playing with the code from src/lib/libssl (applies for LibreSSL), which comes from OpenBSD.
grep -r timingsafe_memcmp src/lib/libssl
In every one of those cases, `timingsafe_memcmp' can be correctly
(and safely) replaced by `!consttime_memequal'.
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