F41 Change Proposal: Disable openSSL Engine Support (system-wide)

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Wiki - https://fedoraproject.org/wiki/Changes/OpensslNoEngine

This is a proposed Change for Fedora Linux.
This document represents a proposed Change. As part of the Changes
process, proposals are publicly announced in order to receive
community feedback. This proposal will only be implemented if approved
by the Fedora Engineering Steering Committee.

== Summary ==
We disable support of engines in OpenSSL

== Owner ==
* Name: [[User:Dbelyavs| Dmitry Belyavskiy]]
* Email: dbelyavs@xxxxxxxxxx

== Detailed Description ==
We are going to build OpenSSL without engine support. Engines are not
FIPS compatible and corresponding API is deprecated since OpenSSL 3.0.
The engine functionality we are aware of (PKCS#11, TPM) is either
covered by providers or will be covered soon.

== Feedback ==


== Benefit to Fedora ==
We get rid of deprecated functionality and enforce using up-to-date
API. Engine support is deprecated in OpenSSL upstream, and after
provider migration caused some deficiencies with engine support. No
new features will be added to the engine. So we reduce the maintenance
burden and potentially attack surface.

It follows the approach planned for CentOS 10.

== Scope ==
* Proposal owners: maintainers of packages enumerated here:
https://clang.fedorapeople.org/c10s-engine-users/ plus probably owners
of some Fedora-only packages

For most of the packages the maintainers will just have to rebuild
their packages after the OpenSSL change lands in compose. For  several
packages some patches should be implemented to prevent compilation
errors.

* Other developers: -

* Release engineering: [https://pagure.io/releng/issues #Releng issue number]
This change probably requires mass-rebuild.

* Policies and guidelines: We need reject/modify packages providing
OpenSSL engines

* Trademark approval: N/A (not needed for this Change)

* Alignment with Community Initiatives:

== Upgrade/compatibility impact ==
OpenSSL engines will no longer be supported. Engines will not be
supported in openssl configuration files (presumably silently
ignored). Users will have to reconfigure systems to providers if they
use engines.


== How To Test ==
OpenSSL libcrypto.so doesn't export any ENGINE_* symbols (~120 lines).
Application is normally built.



== User Experience ==
Users will have to reconfigure systems to providers if they use
engines. No other changes are expected.


== Dependencies ==
In theory, all OpenSSL-dependent packages. In practice, only those
that explicitly use ENGINE api.



== Contingency Plan ==
Reenable engine support but remove engine header file to allow old
applications work preventing appearing new ones.

* Contingency mechanism: (What to do?  Who will do it?) rebuild
OpenSSL and dependent packages
* Contingency deadline: beta freeze?
* Blocks release? Yes


== Documentation ==
TBD


== Release Notes ==
TBD



-- 
Aoife Moloney

Fedora Operations Architect

Fedora Project

Matrix: @amoloney:fedora.im

IRC: amoloney
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