linux-kernel - [PATCH v2] X.509: Support parsing certificate using SM2 algorithm

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Date:   Mon, 27 Jun 2022 17:19:58 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>,
        David Howells <dhowells@...hat.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Subject: [PATCH v2] 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>
Acked-by: Jarkko Sakkinen <jarkko@...nel.org>
---
 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 2899ed80bb18..7a9b084e2043 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -508,6 +508,9 @@ 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;
-- 
2.24.3 (Apple Git-128)