From patchwork Wed Nov 6 19:01:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 11230877 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D964C1864 for ; Wed, 6 Nov 2019 19:02:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADC56218AE for ; Wed, 6 Nov 2019 19:02:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="IYQfPpBx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732237AbfKFTB1 (ORCPT ); Wed, 6 Nov 2019 14:01:27 -0500 Received: from linux.microsoft.com ([13.77.154.182]:36128 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732215AbfKFTB1 (ORCPT ); Wed, 6 Nov 2019 14:01:27 -0500 Received: from nramas-ThinkStation-P520.corp.microsoft.com (unknown [131.107.174.108]) by linux.microsoft.com (Postfix) with ESMTPSA id 7E2A82010C18; Wed, 6 Nov 2019 11:01:26 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7E2A82010C18 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1573066886; bh=fjc1SDZ6eAyerupfns9th1oRdeR4c1j0/l98r7qhoWI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=IYQfPpBxfFCmXMbhSh7x03hOIBgGLnV2WV8Bb94KUj/gJab9+0p32BILkWBdNZscL u44Maavjs7FLkS3j7zTfE0wnqbT15F5seP9GmE7MnDZPfbb3fIRGOFN0tOQU9OgS/N JMsRdnR1UP3OdLm5I6Rz2OrlUbZKGLHKpB3k0DEc= From: Lakshmi Ramasubramanian To: zohar@linux.ibm.com, dhowells@redhat.com, matthewgarrett@google.com, sashal@kernel.org, jamorris@linux.microsoft.com, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 01/10] IMA: Defined an IMA hook to measure keys on key create or update Date: Wed, 6 Nov 2019 11:01:07 -0800 Message-Id: <20191106190116.2578-2-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191106190116.2578-1-nramas@linux.microsoft.com> References: <20191106190116.2578-1-nramas@linux.microsoft.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Asymmetric keys used for verifying file signatures or certificates are currently not included in the IMA measurement list. This patch defines a new IMA hook namely ima_post_key_create_or_update() to measure asymmetric keys. Signed-off-by: Lakshmi Ramasubramanian --- security/integrity/ima/ima_main.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index d7e987baf127..a0e233afe876 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -721,6 +721,22 @@ void ima_kexec_cmdline(const void *buf, int size) KEXEC_CMDLINE, 0); } +/** + * ima_post_key_create_or_update - measure asymmetric keys + * @keyring: keyring to which the key is linked to + * @key: created or updated key + * @flags: key flags + * @create: flag indicating whether the key was created or updated + * + * Keys can only be measured, not appraised. + */ +void ima_post_key_create_or_update(struct key *keyring, struct key *key, + unsigned long flags, bool create) +{ + if ((keyring != NULL) && (key != NULL)) + return; +} + static int __init init_ima(void) { int error;