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X.509: support OSCCA certificate parse

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The digital certificate format based on SM2 crypto algorithm as
specified in GM/T 0015-2012. It was published by State Encryption
Management Bureau, China.

This patch adds the OID object identifier defined by OSCCA. The
x509 certificate supports SM2-with-SM3 type certificate parsing.
It uses the standard elliptic curve public key, and the sm2
algorithm signs the hash generated by sm3.

Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Tested-by: Xufeng Zhang <yunbo.xufeng@linux.alibaba.com>
Reviewed-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tianjia Zhang 2020-09-21 00:21:01 +08:00 committed by Herbert Xu
parent 8b805b97fc
commit 254f84f559
2 changed files with 28 additions and 5 deletions
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27
crypto/asymmetric_keys/x509_cert_parser.c
View File

@ -234,6 +234,10 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
case OID_gost2012Signature512:
ctx->cert->sig->hash_algo = "streebog512";
goto ecrdsa;
case OID_SM2_with_SM3:
ctx->cert->sig->hash_algo = "sm3";
goto sm2;
}
rsa_pkcs1:
@ -246,6 +250,11 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
ctx->cert->sig->encoding = "raw";
ctx->algo_oid = ctx->last_oid;
return 0;
sm2:
ctx->cert->sig->pkey_algo = "sm2";
ctx->cert->sig->encoding = "raw";
ctx->algo_oid = ctx->last_oid;
return 0;
}
/*
@ -266,7 +275,8 @@ int x509_note_signature(void *context, size_t hdrlen,
}
if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0 ||
strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0) {
strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0 ||
strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0) {
/* Discard the BIT STRING metadata */
if (vlen < 1 || *(const u8 *)value != 0)
return -EBADMSG;
@ -451,13 +461,20 @@ int x509_extract_key_data(void *context, size_t hdrlen,
struct x509_parse_context *ctx = context;
ctx->key_algo = ctx->last_oid;
if (ctx->last_oid == OID_rsaEncryption)
switch (ctx->last_oid) {
case OID_rsaEncryption:
ctx->cert->pub->pkey_algo = "rsa";
else if (ctx->last_oid == OID_gost2012PKey256 ||
ctx->last_oid == OID_gost2012PKey512)
break;
case OID_gost2012PKey256:
case OID_gost2012PKey512:
ctx->cert->pub->pkey_algo = "ecrdsa";
else
break;
case OID_id_ecPublicKey:
ctx->cert->pub->pkey_algo = "sm2";
break;
default:
return -ENOPKG;
}
/* Discard the BIT STRING metadata */
if (vlen < 1 || *(const u8 *)value != 0)

6
include/linux/oid_registry.h
View File

@ -107,6 +107,12 @@ enum OID {
OID_gostTC26Sign512B, /* 1.2.643.7.1.2.1.2.2 */
OID_gostTC26Sign512C, /* 1.2.643.7.1.2.1.2.3 */
/* OSCCA */
OID_sm2, /* 1.2.156.10197.1.301 */
OID_sm3, /* 1.2.156.10197.1.401 */
OID_SM2_with_SM3, /* 1.2.156.10197.1.501 */
OID_sm3WithRSAEncryption, /* 1.2.156.10197.1.504 */
OID__NR
};