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-rw-r--r--kernel/module_signing.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/module_signing.c b/kernel/module_signing.c
index 6528a79d998d..64b9dead4a07 100644
--- a/kernel/module_signing.c
+++ b/kernel/module_signing.c
@@ -11,10 +11,17 @@
#include <linux/kernel.h>
#include <linux/errno.h>
+#include <linux/string.h>
#include <keys/system_keyring.h>
#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.
*