1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/module_signing.c b/kernel/module_signing.c
index 9cfa46d8d14f..64b9dead4a07 100644
--- a/kernel/module_signing.c
+++ b/kernel/module_signing.c
@@ -16,6 +16,12 @@
 #include <crypto/public_key.h>
 #include "module-internal.h"
 
+enum pkey_id_type {
+        PKEY_ID_PGP,            /* OpenPGP generated key ID */
+        PKEY_ID_X509,           /* X.509 arbitrary subjectKeyIdentifier */
+        PKEY_ID_PKCS7,          /* Signature in PKCS#7 message */
+};
+
 /*
  * Module signature information block.
  *