This adapts the engine build infrastructure to allow building providers,
and packages the legacy provider. Providers are the successors of
engines, which have been deprecated.
The legacy provider supplies OpenSSL implementations of algorithms that
have been deemed legacy, including DES, IDEA, MDC2, SEED, and Whirlpool.
Even though these algorithms are implemented in a separate package,
their removal makes the regular library smaller by 3%, so the build
options will remain to allow lean custom builds. Their defaults will
change to 'y' if not bulding for a small flash, so that the regular
legacy package will contain a complete set of algorithms.
The engine build and configuration structure was changed to accomodate
providers, and adapt to the new style of openssl.cnf in version 3.0.
There is not a clean upgrade path for the /etc/ssl/openssl.cnf file,
installed by the openssl-conf package. It is recommended to rename or
remove the old config file when flashing an image with the updated
openssl-conf package, then apply the changes manually.
An old openssl.cnf file will silently work, but new engine or provider
packages will not be enabled. Any remaining engine config files under
/etc/ssl/engines.cnf.d can be removed.
On the build side, the include file used by engine packages was renamed
to openssl-module.mk, so the engine packages in other feeds need to
adapt.
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
The bump to 3.0.8 inadvertently removed patches that are needed here,
but were not adopted upstream. The most important one changes the
default value of the DIGESTS setting from ALL to NONE. The absence of
this patch causes a sysupgrade failure while the engine is in use with
digests enabled. When this happens, the system fails to boot with a
kernel panic.
Also, explicitly set DIGESTS to NONE in the provided config file, and
change the default ciphers setting to disable ECB, which has been
recommended for a long time and may cause trouble with some apps.
The config file change by itself is not enough because the config file
may be preserved during sysupgrade.
For people affected by this bug:
You can either:
1. remove, the libopenssl-devcrypto package
2. disable the engine in /etc/config/openssl;
3. change /etc/ssl/engines.cnf.d/devcrypto.cnf to set DIGESTS=NONE;
4. update libopenssl-devcrypto to >=3.0.8-3
However, after doing any of the above, **you must reboot the device
before running sysupgrade** to ensure no running application is using
the engine. Running `/etc/init.d/openssl restart` is not enough.
Fixes: 7e7e76afca "openssl: bump to 3.0.8"
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
This changes the configuration of engines from the global openssl.cnf to
files in the /etc/ssl/engines.cnf.d directory. The engines.cnf file has
the list of enabled engines, while each engine has its own configuration
file installed under /etc/ssl/engines.cnf.d.
Patches were refreshed with --zero-commit.
Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
