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authorIuliana Prodan <iuliana.prodan@nxp.com>2019-07-31 16:05:54 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-08-09 15:11:41 +1000
commit65526f638efc6435b9658d45a3ddd07e6fdbbb7d (patch)
treefdcca374538f5484e5bafaf6b242f7d405cd763c /include
parentcrypto: inside-secure - Remove redundant DES ECB & CBC keysize check (diff)
downloadlinux-dev-65526f638efc6435b9658d45a3ddd07e6fdbbb7d.tar.xz
linux-dev-65526f638efc6435b9658d45a3ddd07e6fdbbb7d.zip
crypto: gcm - helper functions for assoclen/authsize check
Added inline helper functions to check authsize and assoclen for gcm, rfc4106 and rfc4543. These are used in the generic implementation of gcm, rfc4106 and rfc4543. Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to '')
-rw-r--r--include/crypto/gcm.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/crypto/gcm.h b/include/crypto/gcm.h
index c50e057ea17e..9d7eff04f224 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