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Date:   Tue, 5 Oct 2021 10:14:58 -0700
From:   Adam Langley <>
To:     Eric Biggers <>
Cc:     Lee Jones <>,,
        David Howells <>,
        David Woodhouse <>,
Subject: Re: [PATCH 1/1] sign-file: Use OpenSSL provided define to compile out
 deprecated APIs

On Tue, Oct 5, 2021 at 10:01 AM Eric Biggers <> wrote:
> I ran into these same -Wdeprecated-declarations compiler warnings on another
> project that uses the ENGINE API to access OpenSSL's support for PKCS#11 tokens.
> The conclusion was that in OpenSSL 3.0, the new API for PKCS#11 support isn't
> actually ready yet, so we had to keep using the ENGINE API and just add
> -Wno-deprecated-declarations to the compiler flags.
> Your patch just removes support for PKCS#11 in that case, which seems
> undesirable.  (Unless no one is actually using it?)

The patch removes support when OPENSSL_NO_ENGINE is defined, but
that's not defined by default in OpenSSL 3.0. (Unless something
changed recently.)

When OPENSSL_NO_ENGINE is defined, ENGINE support is not compiled into
OpenSSL and the headers don't include the functions:



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