On Wed, 2021-01-27 at 07:33 -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb@xxxxxxxxxxxxx>
>
> Detect whether a key is an sm2 type of key by its OID in the parameters
> array rather than assuming that everything under OID_id_ecPublicKey
> is sm2, which is not the case.
>
> Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
> ---
> crypto/asymmetric_keys/x509_cert_parser.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
> index 52c9b455fc7d..4643fe5ed69a 100644
> --- a/crypto/asymmetric_keys/x509_cert_parser.c
> +++ b/crypto/asymmetric_keys/x509_cert_parser.c
> @@ -459,6 +459,7 @@ 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) {
> @@ -470,7 +471,17 @@ 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)
Either a named constant, or at least a comment instead of just '2'.
> + return -ENOPKG;
> +
> + oid = look_up_OID(ctx->params + 2, ctx->params_size - 2);
> + switch (oid) {
> + case OID_sm2:
> + ctx->cert->pub->pkey_algo = "sm2";
> + break;
> + default:
> + return -ENOPKG;
> + }
> break;
> default:
> return -ENOPKG;
/Jarkko
