pkcs7: support EC-RDSA/streebog in SignerInfo

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 <[email protected]>
Reviewed-by: Vitaly Chikunov <[email protected]>
Reviewed-by: Tianjia Zhang <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>

Author: Elvira Khabirova

crypto/asymmetric_keys/pkcs7_parser.c

@@ -251,6 +251,12 @@ int pkcs7_sig_note_digest_algo(void *context, size_t hdrlen,
 	case OID_sm3:
 		ctx->sinfo->sig->hash_algo = "sm3";
 		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;
@@ -284,6 +290,11 @@ int pkcs7_sig_note_pkey_algo(void *context, size_t hdrlen,
 		ctx->sinfo->sig->pkey_algo = "sm2";
 		ctx->sinfo->sig->encoding = "raw";
 		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;