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

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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@xxxxxx>

Reviewed-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>

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;




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