ipa upgrade: handle double-encoded certificates
Issue is linked to the ticket
#3477 LDAP upload CA cert sometimes double-encodes the value
In old FreeIPA releases (< 3.2), the upgrade plugin was encoding twice
the value of the certificate in cn=cacert,cn=ipa,cn=etc,$BASEDN.
The fix for 3477 is only partial as it prevents double-encoding when a
new cert is uploaded but does not fix wrong values already present in LDAP.
With this commit, the code first tries to read a der cert. If it fails,
it logs a debug message and re-writes the value caCertificate;binary
to repair the entry.
Fixes https://pagure.io/freeipa/issue/7775
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>