[PATCH 3/3] x509: Detect sm2 keys by their parameters OID
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From: Stefan Berger <hidden>
Date: 2021-01-27 00:20:37
Also in:
keyrings, lkml
Subsystem:
asymmetric keys, crypto api, the rest · Maintainers:
David Howells, Lukas Wunner, Ignat Korchagin, Herbert Xu, "David S. Miller", Linus Torvalds
Revision v1 of 4 in this series.
Revisions (4)
- v1 current
- v2 [diff vs current]
- v3 [diff vs current]
- v4 [diff vs current]
From: Stefan Berger <stefanb@linux.ibm.com> Detect whether a key is a sm2 type of key by its OID in the parameters array. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> --- crypto/asymmetric_keys/x509_cert_parser.c | 27 +++++++++++++---------- 1 file changed, 15 insertions(+), 12 deletions(-)
diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 720cc7977077..82e331da5041 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c@@ -485,6 +485,7 @@ int x509_extract_key_data(void *context, size_t hdrlen, const void *value, size_t vlen) { struct x509_parse_context *ctx = context; + enum OID oid; ctx->key_algo = ctx->last_oid; switch (ctx->last_oid) {
@@ -496,18 +497,20 @@ int x509_extract_key_data(void *context, size_t hdrlen, ctx->cert->pub->pkey_algo = "ecrdsa"; break; case OID_id_ecPublicKey: - ctx->cert->pub->pkey_algo = "sm2"; - if (ctx->params_size > 2) { - enum OID oid = look_up_OID(ctx->params + 2, - ctx->params_size - 2); - switch (oid) { - case OID_id_prime192v1: - case OID_id_prime256v1: - ctx->cert->pub->pkey_algo = "ecdsa"; - break; - default: - break; - } + if (ctx->params_size < 2) + return -ENOPKG; + + oid = look_up_OID(ctx->params + 2, ctx->params_size - 2); + switch (oid) { + case OID_id_prime192v1: + case OID_id_prime256v1: + ctx->cert->pub->pkey_algo = "ecdsa"; + break; + case OID_sm2: + ctx->cert->pub->pkey_algo = "sm2"; + break; + default: + return -ENOPKG; } break; default:
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2.25.4