linux-kernel - Re: [PATCH] perf/genelf: Switch deprecated openssl MD5

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Message-ID: <CABwm_eT=BHQB=ELEWTZtXG61WyYVqQfp+gy85aD3xMRycKtLwA@mail.gmail.com>
Date:   Tue, 6 Sep 2022 17:40:24 +0800
From:   Zixuan Tan <tanzixuan.me@...il.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf/genelf: Switch deprecated openssl MD5_* functions to
 new EVP API

Hi Arnaldo, are there any updates?

Thanks,
- Zixuan

On Sat, Aug 27, 2022 at 2:32 AM Namhyung Kim <namhyung@...nel.org> wrote:
>
> Hello,
>
> On Fri, Aug 26, 2022 at 10:22 AM Zixuan Tan <tanzixuan.me@...il.com> wrote:
> >
> > On Fri, Aug 26, 2022 at 4:17 AM Arnaldo Carvalho de Melo
> > <arnaldo.melo@...il.com> wrote:
> > >
> > > Em Fri, Aug 26, 2022 at 01:00:58AM +0800, Zixuan Tan escreveu:
> > > > Switch to the flavored EVP API like in test-libcrypto.c, and remove the
> > > > bad gcc #pragma.
> > > >
> > > > Inspired-By: 5b245985a6de ("tools build: Switch to new openssl API for
> > > > test-libcrypto")
> > >
> > > How did you test the end result? Can you please describe step by step?
> > >
> > > Also please consider adding a 'perf test' entry to make sure this
> > > doesn't regress.
> >
> > Sorry but I don't get what you mean, what results do I need to test?
> >
> > These EVP_* APIs are just replacements for the deprecated MD5_* APIs in
> > openssl v3 [1][2]. With the same input, they produce the same MD5 digest.
> >
> > And this patch just does the migration work for the upgrade and does not
> > change the logic of the code. so...what should I test?
>
> Yeah, I understand that this merely changes the MD5 APIs.
> While it's good to have a test case for the genelf code, I don't think
> it belongs to this patch.  So,
>
> Acked-by: Namhyung Kim <namhyung@...nel.org>
>
>
> >
> > Links:
> > [1] https://www.openssl.org/docs/man3.0/man3/MD5.html
> > [2] https://stackoverflow.com/questions/69806220/advice-needed-for-migration-of-low-level-openssl-api-to-high-level-openssl-apis