On Tuesday, 2021-11-23 at 23:41:14 -05, Eric Snowberg wrote: > Set the restriction check for INTEGRITY_KEYRING_MACHINE keys to > restrict_link_by_ca. This will only allow CA keys into the machine > keyring. > > Signed-off-by: Eric Snowberg <eric.snowberg@xxxxxxxxxx> Reviewed-by: Darren Kenny <darren.kenny@xxxxxxxxxx> > --- > v1: Initial version > v2: Added !IS_ENABLED(CONFIG_INTEGRITY_TRUSTED_KEYRING check so mok > keyring gets created even when it isn't enabled > v3: Rename restrict_link_by_system_trusted_or_ca to restrict_link_by_ca > v4: removed unnecessary restriction->check set > v5: Rename to machine keyring > v6: split line over 80 char (suggested by Mimi) > v8: Unmodified from v6 > --- > security/integrity/digsig.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c > index 910fe29a5037..e7dfc55a7c55 100644 > --- a/security/integrity/digsig.c > +++ b/security/integrity/digsig.c > @@ -132,14 +132,18 @@ int __init integrity_init_keyring(const unsigned int id) > goto out; > } > > - if (!IS_ENABLED(CONFIG_INTEGRITY_TRUSTED_KEYRING)) > + if (!IS_ENABLED(CONFIG_INTEGRITY_TRUSTED_KEYRING) && > + id != INTEGRITY_KEYRING_MACHINE) > return 0; > > restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL); > if (!restriction) > return -ENOMEM; > > - restriction->check = restrict_link_to_ima; > + if (id == INTEGRITY_KEYRING_MACHINE) > + restriction->check = restrict_link_by_ca; > + else > + restriction->check = restrict_link_to_ima; > > /* > * No additional keys shall be allowed to load into the machine > -- > 2.18.4
