linux-kernel - Re: [PATCH] pkcs7: support EC-RDSA/streebog in SignerInfo

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Message-ID: <0091ddbc-a32d-848a-4f18-37b041a048f4@linux.alibaba.com>
Date:   Sat, 3 Jul 2021 10:07:08 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Elvira Khabirova <e.khabirova@....ru>, keyrings@...r.kernel.org,
        Vitaly Chikunov <vt@...linux.org>
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        davem@...emloft.net, herbert@...dor.apana.org.au,
        dhowells@...hat.com, vt@...linux.org
Subject: Re: [PATCH] pkcs7: support EC-RDSA/streebog in SignerInfo

Hi Elvira,

On 5/11/21 10:47 PM, Elvira Khabirova wrote:
> Allow using EC-RDSA/streebog in pkcs7 certificates in a similar way
> to how it's done in the x509 parser.
> 
> This is needed e.g. for loading kernel modules signed with EC-RDSA.
> 
> Signed-off-by: Elvira Khabirova <e.khabirova@....ru>

Reviewed-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>

I sent a similar patch to support the SM2/3 algorithm combination, which 
happened to conflict with your patch.

https://lkml.org/lkml/2021/6/24/248

If possible and you agree, I will put these two patches in a series and 
then resend.

Cheers,
Tianjia

> ---
>   crypto/asymmetric_keys/pkcs7_parser.c | 11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
> diff --git a/crypto/asymmetric_keys/pkcs7_parser.c b/crypto/asymmetric_keys/pkcs7_parser.c
> index 967329e0a07b..39c260a04167 100644
> --- a/crypto/asymmetric_keys/pkcs7_parser.c
> +++ b/crypto/asymmetric_keys/pkcs7_parser.c
> @@ -248,6 +248,12 @@ int pkcs7_sig_note_digest_algo(void *context, size_t hdrlen,
>   	case OID_sha224:
>   		ctx->sinfo->sig->hash_algo = "sha224";
>   		break;
> +	case OID_gost2012Digest256:
> +		ctx->sinfo->sig->hash_algo = "streebog256";
> +		break;
> +	case OID_gost2012Digest512:
> +		ctx->sinfo->sig->hash_algo = "streebog512";
> +		break;
>   	default:
>   		printk("Unsupported digest algo: %u\n", ctx->last_oid);
>   		return -ENOPKG;
> @@ -269,6 +275,11 @@ int pkcs7_sig_note_pkey_algo(void *context, size_t hdrlen,
>   		ctx->sinfo->sig->pkey_algo = "rsa";
>   		ctx->sinfo->sig->encoding = "pkcs1";
>   		break;
> +	case OID_gost2012PKey256:
> +	case OID_gost2012PKey512:
> +		ctx->sinfo->sig->pkey_algo = "ecrdsa";
> +		ctx->sinfo->sig->encoding = "raw";
> +		break;
>   	default:
>   		printk("Unsupported pkey algo: %u\n", ctx->last_oid);
>   		return -ENOPKG;
>