From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEE7E2F39BF; Mon, 27 Oct 2025 09:50:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761558657; cv=none; b=j4TPAu+yWk/Ehoknh9VP4ZyqZ6gGli+cf/ud2StL4bo4OZquwpT1qwW18BoiB6231B5tRd7IcDPPLyNfKcHa9B6OBJfw5Z3G8pJkp7Y0cab/89jYX2iw6yiobahzeTBNW3qT00DEKNdKCg7+Tc06k7xmPaWLkWPLR2U/mIERQME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761558657; c=relaxed/simple; bh=ZwxWW0luOHwrk3YhZSDx0yDOjLl070ZaGpU4yv5QUjk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ASfMkWK/E1sZHgpHm+eSTBWBkELRBdIGXdUDrwv6MWXk15ZdhWVIrO0XpcrtQV2lHd0MQP8EgB4vKvkiXxbuIh9WAV92m1O6AjmC6wF0NLjsSeS0fCSTBdUrFPSA2lrsdKzo8BNnYX3jXs9T9PUw5EeOVAb1vqJTk/m9GsIPmUk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Xegy9P2h; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Xegy9P2h" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6861CC116B1; Mon, 27 Oct 2025 09:50:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761558657; bh=ZwxWW0luOHwrk3YhZSDx0yDOjLl070ZaGpU4yv5QUjk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xegy9P2hEkFdQAPrWxikKps4gKUIdShVShL/8AEGb6+RzcTtwrx+AvcIddwWt6H8h VZSZd4QxH0K8Tw2OHGIddPJ77makHapqOEW+EcqrzZPbyd7A33KXBUpA8yQOKtU1It yl5rva+RZ8o75ce+C0czDbh0L3HhzAa0RPLNl7I7wzqq5QtbsyyxwKxb4NU7yKCWky cQ/v7w5NRZCTHRoPrZy2e762payQRf/Ac3Ju5upguOQK4By0i0YrxK5dHbMBG3Tboh 6Nlh03TwmnQ3PpXuLlQkntkgyVpbwybuvJRID4/ncmhfQeShnXKP+lvW86yvGWxE/z uAh3LMCrT4jsg== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dan.j.williams@intel.com, aik@amd.com, lukas@wunner.de, Samuel Ortiz , Xu Yilun , Jason Gunthorpe , Suzuki K Poulose , Steven Price , Bjorn Helgaas , Jonathan Cameron , Catalin Marinas , Marc Zyngier , Will Deacon , Oliver Upton , Wilfred Mallawa , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Subject: [PATCH 10/12] X.509: Parse Subject Alternative Name in certificates Date: Mon, 27 Oct 2025 15:19:01 +0530 Message-ID: <20251027094916.1153143-10-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251027094916.1153143-1-aneesh.kumar@kernel.org> References: <20251027094916.1153143-1-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Lukas Wunner The upcoming support for PCI device authentication with CMA-SPDM (PCIe r6.1 sec 6.31) requires validating the Subject Alternative Name in X.509 certificates. Store a pointer to the Subject Alternative Name upon parsing for consumption by CMA-SPDM. Signed-off-by: Lukas Wunner Reviewed-by: Wilfred Mallawa Reviewed-by: Ilpo Järvinen Reviewed-by: Jonathan Cameron Acked-by: Dan Williams --- crypto/asymmetric_keys/x509_cert_parser.c | 9 +++++++++ include/keys/x509-parser.h | 2 ++ 2 files changed, 11 insertions(+) diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c index 8df3fa60a44f..5942679f125a 100644 --- a/crypto/asymmetric_keys/x509_cert_parser.c +++ b/crypto/asymmetric_keys/x509_cert_parser.c @@ -571,6 +571,15 @@ int x509_process_extension(void *context, size_t hdrlen, return 0; } + if (ctx->last_oid == OID_subjectAltName) { + if (ctx->cert->raw_san) + return -EBADMSG; + + ctx->cert->raw_san = v; + ctx->cert->raw_san_size = vlen; + return 0; + } + if (ctx->last_oid == OID_keyUsage) { /* * Get hold of the keyUsage bit string diff --git a/include/keys/x509-parser.h b/include/keys/x509-parser.h index 37436a5c7526..8e450befe3b9 100644 --- a/include/keys/x509-parser.h +++ b/include/keys/x509-parser.h @@ -36,6 +36,8 @@ struct x509_certificate { unsigned raw_subject_size; unsigned raw_skid_size; const void *raw_skid; /* Raw subjectKeyId in ASN.1 */ + const void *raw_san; /* Raw subjectAltName in ASN.1 */ + unsigned raw_san_size; unsigned index; bool seen; /* Infinite recursion prevention */ bool verified; -- 2.43.0