[PATCH v3] Add support for OpenSSL Provider API

Thu Apr 2 00:05:29 CEST 2026

On 02/27/26, Tom Rini wrote:
> On Fri, Feb 27, 2026 at 10:36:53AM -0700, Eddie Kovsky wrote:
> > On 02/19/26, Tom Rini wrote:
> > > On Thu, Feb 19, 2026 at 09:51:05AM -0700, Eddie Kovsky wrote:
> > > 
> > > > On 01/29/26, Mattijs Korpershoek wrote:
> > > > > Hi Eddie,
> > > > > 
> > > > > Thank you for the patch.
> > > > > 
> > > > 
> > > > Hi Mattijs
> > > > 
> > > > Thanks for the review.
> > > > 
> > > > > On Tue, Jan 20, 2026 at 09:45, Eddie Kovsky <ekovsky at redhat.com> wrote:
> > > > > 
> > > > > > The Engine API has been deprecated since the release of OpenSSL 3.0. End
> > > > > > users have been advised to migrate to the new Provider interface.
> > > > > > Several distributions have already removed support for engines, which is
> > > > > > preventing U-Boot from being compiled in those environments.
> > > > > >
> > > > > > Add support for the Provider API while continuing to support the existing
> > > > > > Engine API on distros shipping older releases of OpenSSL.
> > > > > >
> > > > > > This is based on similar work contributed by Jan Stancek updating Linux
> > > > > > to use the Provider interface.
> > > > > >
> > > > > >     commit 558bdc45dfb2669e1741384a0c80be9c82fa052c
> > > > > >     Author: Jan Stancek <jstancek at redhat.com>
> > > > > >     Date:   Fri Sep 20 19:52:48 2024 +0300
> > > > > >
> > > > > >         sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3
> > > > > >
> > > > > > The changes have been tested with the FIT signature verification vboot
> > > > > > tests on Fedora 42 and Debian 13. All 30 tests pass with both the legacy
> > > > > > Engine library installed and with the Provider API.
> > > > > >
> > > > > > Signed-off-by: Eddie Kovsky <ekovsky at redhat.com>
> > > [snip]
> > > > Sure, I can update the comment for v4.
> > 
> > Hi Tom
> > 
> > > 
> > > Since we're talking about v4, can you please make sure that for v4 it:
> > > - Passes CI https://docs.u-boot.org/en/latest/develop/ci_testing.html as
> > >   that will cover some non-Linux host builds.
> > 
> > I don't have resources available to set up a Gitlab runner. Based on the
> > documentation you provided it seems like this wouldn't be effective for
> > me as a non-custodian.
> 
> Yes, correct, today using Azure is the easy option.
> 
> > I did use GitHub to trigger an Azure pipeline. There was one failure and
> > several errors in the binman Command Line test.
> > 
> >     https://github.com/u-boot/u-boot/pull/875/checks?check_run_id=65015204887
> 
> And the full log is:
> https://dev.azure.com/u-boot/u-boot/_build/results?buildId=12893&view=logs&j=c59aff74-743b-5f08-f408-4a608a489153&t=f2ea3536-b291-5a39-ad92-0220c9b8101a
> 
> and so yes, it's from your changes.
> 
> > These are PKCS11 errors, so of course I thought my patch was to blame.
> > But I'm seeing the same errors on Debian 13 running 'binman test'
> > manually on the master branch.
> 
> Some of the tests are indeed more frustrating than others to run either
> outside of CI, or outside of the containers, or both. I would recommend
> looking at the portion of .azure-pipelines.yml for that job for the
> steps to replicate, and if it doesn't work inside of your host (and
> https://docs.u-boot.org/en/latest/build/gcc.html is still missing
> things) it's easiest to just pull and run the CI container.
> 
> > > - See if you can get access to a FreeBSD or OpenBSD host and make sure
> > >   the tools build still works there too? I was hoping Mark would have
> > >   commented / tested-by v3 because I do want to make sure the libressl
> > >   case still builds. At worst case, I have a freebie Oracle VM that's
> > >   FreeBSD based, so you can maybe spin one of those up as well?
> > > 
> > 
> > I spent some time again setting up OpenBSD and FreeBSD virtual machines, but I was
> > unable to reproduce the build environment for U-Boot. But thanks to
> > Enric and Mark's work it looks like we have the LibreSSL use case
> > covered now.
> 
> Yes, thanks.
> 
> -- 
> Tom

I finally got to the bottom of this. Debian/Ubuntu ship OpenSSL backends
separately. The CI environment is missing the 'pkcs11-provider'
package, which is causing the binman tests to fail.

    $ apt show pkcs11-provider
    Package: pkcs11-provider
    Version: 1.0-3
    Priority: optional
    Section: libs
    Maintainer: Luca Boccassi <bluca at debian.org>
    Installed-Size: 410 kB
    Depends: libc6 (>= 2.34), libssl3t64 (>= 3.0.7~)
    Homepage: https://github.com/latchset/pkcs11-provider
    Download-Size: 125 kB
    APT-Manual-Installed: yes
    APT-Sources: http://ftp.debian.org/debian stable/main amd64 Packages
    Description: OpenSSL 3 provider for PKCS11
    With this provider for OpenSSL you can use the OpenSSL library
    (version 3) and command line tools with any PKCS11 implementation as
    backend for the crypto operations.

With this package installed the SSL errors logged on Azure are no longer reproducible.

The results from the first pipeline expired while I was investigating
this. I reran the CI job so you can see the error messages.

    https://dev.azure.com/u-boot/u-boot/_build/results?buildId=13035&view=logs&j=c59aff74-743b-5f08-f408-4a608a489153&t=f2ea3536-b291-5a39-ad92-0220c9b8101a

I have looked into the .azure-pipelines.yml file, but it's not clear to
me how to configure the CI to install extra packages.

Eddie