netdev - [PATCH 5/7] xfrm: Add support for SM3 secure hash

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Date:   Thu, 6 Jan 2022 10:13:48 +0100
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
CC:     Herbert Xu <herbert@...dor.apana.org.au>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        <netdev@...r.kernel.org>
Subject: [PATCH 5/7] xfrm: Add support for SM3 secure hash

From: Xu Jia <xujia39@...wei.com>

This patch allows IPsec to use SM3 HMAC authentication algorithm.

Signed-off-by: Xu Jia <xujia39@...wei.com>
Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
---
 include/uapi/linux/pfkeyv2.h |  1 +
 net/xfrm/xfrm_algo.c         | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/uapi/linux/pfkeyv2.h b/include/uapi/linux/pfkeyv2.h
index d65b11785260..798ba9ffd48c 100644
--- a/include/uapi/linux/pfkeyv2.h
+++ b/include/uapi/linux/pfkeyv2.h
@@ -309,6 +309,7 @@ struct sadb_x_filter {
 #define SADB_X_AALG_SHA2_512HMAC	7
 #define SADB_X_AALG_RIPEMD160HMAC	8
 #define SADB_X_AALG_AES_XCBC_MAC	9
+#define SADB_X_AALG_SM3_256HMAC		10
 #define SADB_X_AALG_NULL		251	/* kame */
 #define SADB_AALG_MAX			251
 
diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c
index 4dae3ab8d030..00b5444a4d86 100644
--- a/net/xfrm/xfrm_algo.c
+++ b/net/xfrm/xfrm_algo.c
@@ -341,6 +341,26 @@ static struct xfrm_algo_desc aalg_list[] = {
 
 	.pfkey_supported = 0,
 },
+{
+	.name = "hmac(sm3)",
+	.compat = "sm3",
+
+	.uinfo = {
+		.auth = {
+			.icv_truncbits = 256,
+			.icv_fullbits = 256,
+		}
+	},
+
+	.pfkey_supported = 1,
+
+	.desc = {
+		.sadb_alg_id = SADB_X_AALG_SM3_256HMAC,
+		.sadb_alg_ivlen = 0,
+		.sadb_alg_minbits = 256,
+		.sadb_alg_maxbits = 256
+	}
+},
 };
 
 static struct xfrm_algo_desc ealg_list[] = {
-- 
2.25.1