| Message ID | 161433313205.902181.2502803393898221637.stgit@warthog.procyon.org.uk (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | keys: Add EFI_CERT_X509_GUID support for dbx/mokx entries | expand |
On Fri, Feb 26, 2021 at 09:52:12AM +0000, David Howells wrote: > From: Eric Snowberg <eric.snowberg@oracle.com> > > During boot the Secure Boot Forbidden Signature Database, dbx, > is loaded into the blacklist keyring. Systems booted with shim > have an equivalent Forbidden Signature Database called mokx. > Currently mokx is only used by shim and grub, the contents are > ignored by the kernel. > > Add the ability to load mokx into the blacklist keyring during boot. > > Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com> > Suggested-by: James Bottomley <James.Bottomley@HansenPartnership.com> > Signed-off-by: David Howells <dhowells@redhat.com> > cc: Jarkko Sakkinen <jarkko@kernel.org> > Link: https://lore.kernel.org/r/20210122181054.32635-5-eric.snowberg@oracle.com/ # v5 > Link: https://lore.kernel.org/r/c33c8e3839a41e9654f41cc92c7231104931b1d7.camel@HansenPartnership.com/ > Link: ohttps://lore.kernel.org/r/161428674320.677100.12637282414018170743.stgit@warthog.procyon.org.uk/ For all: Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> /Jarkko > --- > > security/integrity/platform_certs/load_uefi.c | 20 ++++++++++++++++++-- > 1 file changed, 18 insertions(+), 2 deletions(-) > > diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c > index ee4b4c666854..f290f78c3f30 100644 > --- a/security/integrity/platform_certs/load_uefi.c > +++ b/security/integrity/platform_certs/load_uefi.c > @@ -132,8 +132,9 @@ static int __init load_moklist_certs(void) > static int __init load_uefi_certs(void) > { > efi_guid_t secure_var = EFI_IMAGE_SECURITY_DATABASE_GUID; > - void *db = NULL, *dbx = NULL; > - unsigned long dbsize = 0, dbxsize = 0; > + efi_guid_t mok_var = EFI_SHIM_LOCK_GUID; > + void *db = NULL, *dbx = NULL, *mokx = NULL; > + unsigned long dbsize = 0, dbxsize = 0, mokxsize = 0; > efi_status_t status; > int rc = 0; > > @@ -175,6 +176,21 @@ static int __init load_uefi_certs(void) > kfree(dbx); > } > > + mokx = get_cert_list(L"MokListXRT", &mok_var, &mokxsize, &status); > + if (!mokx) { > + if (status == EFI_NOT_FOUND) > + pr_debug("mokx variable wasn't found\n"); > + else > + pr_info("Couldn't get mokx list\n"); > + } else { > + rc = parse_efi_signature_list("UEFI:MokListXRT", > + mokx, mokxsize, > + get_handler_for_dbx); > + if (rc) > + pr_err("Couldn't parse mokx signatures %d\n", rc); > + kfree(mokx); > + } > + > /* Load the MokListRT certs */ > rc = load_moklist_certs(); > > >
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c index ee4b4c666854..f290f78c3f30 100644 --- a/security/integrity/platform_certs/load_uefi.c +++ b/security/integrity/platform_certs/load_uefi.c @@ -132,8 +132,9 @@ static int __init load_moklist_certs(void) static int __init load_uefi_certs(void) { efi_guid_t secure_var = EFI_IMAGE_SECURITY_DATABASE_GUID; - void *db = NULL, *dbx = NULL; - unsigned long dbsize = 0, dbxsize = 0; + efi_guid_t mok_var = EFI_SHIM_LOCK_GUID; + void *db = NULL, *dbx = NULL, *mokx = NULL; + unsigned long dbsize = 0, dbxsize = 0, mokxsize = 0; efi_status_t status; int rc = 0; @@ -175,6 +176,21 @@ static int __init load_uefi_certs(void) kfree(dbx); } + mokx = get_cert_list(L"MokListXRT", &mok_var, &mokxsize, &status); + if (!mokx) { + if (status == EFI_NOT_FOUND) + pr_debug("mokx variable wasn't found\n"); + else + pr_info("Couldn't get mokx list\n"); + } else { + rc = parse_efi_signature_list("UEFI:MokListXRT", + mokx, mokxsize, + get_handler_for_dbx); + if (rc) + pr_err("Couldn't parse mokx signatures %d\n", rc); + kfree(mokx); + } + /* Load the MokListRT certs */ rc = load_moklist_certs();