[PATCH 6/7] xfrm: Add support for SM4 symmetric cipher algorithm

[Steffen Klassert <steffen.klassert@secunet.com>]

From: Xu Jia <xujia39@huawei.com>

This patch adds SM4 encryption algorithm entry to ealg_list.

Signed-off-by: Xu Jia <xujia39@huawei.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---
 include/uapi/linux/pfkeyv2.h |  1 +
 net/xfrm/xfrm_algo.c         | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/include/uapi/linux/pfkeyv2.h b/include/uapi/linux/pfkeyv2.h
index 798ba9ffd48c..8abae1f6749c 100644
--- a/include/uapi/linux/pfkeyv2.h
+++ b/include/uapi/linux/pfkeyv2.h
@@ -330,6 +330,7 @@ struct sadb_x_filter {
 #define SADB_X_EALG_AES_GCM_ICV16	20
 #define SADB_X_EALG_CAMELLIACBC		22
 #define SADB_X_EALG_NULL_AES_GMAC	23
+#define SADB_X_EALG_SM4CBC		24
 #define SADB_EALG_MAX                   253 /* last EALG */
 /* private allocations should use 249-255 (RFC2407) */
 #define SADB_X_EALG_SERPENTCBC  252     /* draft-ietf-ipsec-ciph-aes-cbc-00 */
diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c
index 00b5444a4d86..094734fbec96 100644
--- a/net/xfrm/xfrm_algo.c
+++ b/net/xfrm/xfrm_algo.c
@@ -572,6 +572,27 @@ static struct xfrm_algo_desc ealg_list[] = {
 		.sadb_alg_maxbits = 288
 	}
 },
+{
+	.name = "cbc(sm4)",
+	.compat = "sm4",
+
+	.uinfo = {
+		.encr = {
+			.geniv = "echainiv",
+			.blockbits = 128,
+			.defkeybits = 128,
+		}
+	},
+
+	.pfkey_supported = 1,
+
+	.desc = {
+		.sadb_alg_id = SADB_X_EALG_SM4CBC,
+		.sadb_alg_ivlen	= 16,
+		.sadb_alg_minbits = 128,
+		.sadb_alg_maxbits = 256
+	}
+},
 };
 
 static struct xfrm_algo_desc calg_list[] = {
-- 
2.25.1