Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/crypto/gcm.h b/include/crypto/gcm.h
index c50e057..9d7eff0 100644
--- a/include/crypto/gcm.h
+++ b/include/crypto/gcm.h
@@ -1,8 +1,63 @@
#ifndef _CRYPTO_GCM_H
#define _CRYPTO_GCM_H
+#include <linux/errno.h>
+
#define GCM_AES_IV_SIZE 12
#define GCM_RFC4106_IV_SIZE 8
#define GCM_RFC4543_IV_SIZE 8
+/*
+ * validate authentication tag for GCM
+ */
+static inline int crypto_gcm_check_authsize(unsigned int authsize)
+{
+ switch (authsize) {
+ case 4:
+ case 8:
+ case 12:
+ case 13:
+ case 14:
+ case 15:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * validate authentication tag for RFC4106
+ */
+static inline int crypto_rfc4106_check_authsize(unsigned int authsize)
+{
+ switch (authsize) {
+ case 8:
+ case 12:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * validate assoclen for RFC4106/RFC4543
+ */
+static inline int crypto_ipsec_check_assoclen(unsigned int assoclen)
+{
+ switch (assoclen) {
+ case 16:
+ case 20:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
#endif