This is a problem since we added commit b5fbbd1 in 2019. Its logic
allowed to add RC4-HMAC keys for cifs/.. service principal but it didn't
account for the case when cifs/.. principal initiates the request.
Since ipasam only uses GETKEYTAB control, provide this extension only
here and don't allow the same for SETKEYTAB. At the point of check for
the bind DN, we already have verified that the DN is allowed to write to
the krbPrincipalKey attribute so there is no leap of faith to 'any
cifs/... principal' here.
A principal must be member of cn=adtrust
agents,cn=sysaccounts,cn=etc,$SUFFIX to allow perform this operation
Fixes: https://pagure.io/freeipa/issue/9134
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
5638bdcb85