linux-kernel - [PATCH] X.509: Support parsing certificate using SM2 algorithm

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Date:   Mon, 12 Jul 2021 16:13:52 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     David Howells <dhowells@...hat.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Biggers <ebiggers@...gle.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Vitaly Chikunov <vt@...linux.org>,
        "Gilad Ben-Yossef" <gilad@...yossef.com>,
        Pascal van Leeuwen <pvanleeuwen@...bus.com>,
        keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jia Zhang <zhang.jia@...ux.alibaba.com>,
        "YiLin . Li" <YiLin.Li@...ux.alibaba.com>
Cc:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Subject: [PATCH] X.509: Support parsing certificate using SM2 algorithm

The SM2-with-SM3 certificate generated by latest openssl no longer
reuses the OID_id_ecPublicKey, but directly uses OID_sm2. This patch
supports this type of x509 certificate parsing.

Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
---
 crypto/asymmetric_keys/x509_cert_parser.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 6d003096b5bc..6a945a6ce787 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -496,6 +496,9 @@ int x509_extract_key_data(void *context, size_t hdrlen,
 	case OID_gost2012PKey512:
 		ctx->cert->pub->pkey_algo = "ecrdsa";
 		break;
+	case OID_sm2:
+		ctx->cert->pub->pkey_algo = "sm2";
+		break;
 	case OID_id_ecPublicKey:
 		if (parse_OID(ctx->params, ctx->params_size, &oid) != 0)
 			return -EBADMSG;
-- 
2.19.1.3.ge56e4f7