From patchwork Mon Mar 22 17:37:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 12155717 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9140C433C1 for ; Mon, 22 Mar 2021 17:37:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9ADC86199E for ; Mon, 22 Mar 2021 17:37:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231751AbhCVRhY (ORCPT ); Mon, 22 Mar 2021 13:37:24 -0400 Received: from linux.microsoft.com ([13.77.154.182]:47844 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230376AbhCVRhW (ORCPT ); Mon, 22 Mar 2021 13:37:22 -0400 Received: from localhost.localdomain (c-73-42-176-67.hsd1.wa.comcast.net [73.42.176.67]) by linux.microsoft.com (Postfix) with ESMTPSA id D7F1820B5680; Mon, 22 Mar 2021 10:37:21 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D7F1820B5680 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1616434642; bh=tdGJSpOdd+gNYUBE8bMuVd7jMmyGBCn5ESFEGuTl1p4=; h=From:To:Cc:Subject:Date:From; b=oirmxqTOkw5+q4GobYuRoKIm0QQv3qx6zGhzLn9hgM8NzcVt864Nd3LA4raCAnmkj 9rvfliNq/P9TKZgRl2RpW8L4Vz8JDTUbaTxCh/9WNhHyi8bMH0JvD3ZMU/OQoezO5s WkAu8LSRDnghrPBAGP6Z9oh7sGH6/B74N8Oyz1w4= From: Lakshmi Ramasubramanian To: pvorel@suse.cz, zohar@linux.ibm.com Cc: tusharsu@linux.microsoft.com, ltp@lists.linux.it, linux-integrity@vger.kernel.org Subject: [PATCH v4] IMA: Allow only ima-buf template for key measurement Date: Mon, 22 Mar 2021 10:37:09 -0700 Message-Id: <20210322173709.22150-1-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org ima-buf is the default IMA template used for all buffer measurements. Therefore, IMA policy rule for measuring keys need not specify an IMA template. But if a template is specified for key measurement rule then it must be only ima-buf. Update keys tests to not require a template to be specified for key measurement rule, but if a template is specified verify it is only ima-buf. Signed-off-by: Lakshmi Ramasubramanian --- .../kernel/security/integrity/ima/README.md | 9 +++++++++ .../security/integrity/ima/tests/ima_keys.sh | 20 ++++++++++++++++--- 2 files changed, 26 insertions(+), 3 deletions(-) diff --git a/testcases/kernel/security/integrity/ima/README.md b/testcases/kernel/security/integrity/ima/README.md index 8f2249767..1aaa734a3 100644 --- a/testcases/kernel/security/integrity/ima/README.md +++ b/testcases/kernel/security/integrity/ima/README.md @@ -28,6 +28,15 @@ policy allowed in the kernel configuration: ``` CONFIG_IMA_READ_POLICY=y ``` +If the IMA key tests are executed on Linux kernel v5.6 through v5.10, +`ima-buf` template should be specified in the IMA policy rule for +key measurement. For example, +`measure func=KEY_CHECK keyrings=key_import_test template=ima-buf` + +If the IMA key tests are executed on Linux kernel v5.11 or later, +`template=ima-buf` is optional in the IMA policy rule for key measurement. +For example, +`measure func=KEY_CHECK keyrings=key_import_test` ### IMA kexec test diff --git a/testcases/kernel/security/integrity/ima/tests/ima_keys.sh b/testcases/kernel/security/integrity/ima/tests/ima_keys.sh index c9eef4b68..b9bef4feb 100755 --- a/testcases/kernel/security/integrity/ima/tests/ima_keys.sh +++ b/testcases/kernel/security/integrity/ima/tests/ima_keys.sh @@ -15,8 +15,7 @@ TST_CLEANUP=cleanup . ima_setup.sh FUNC_KEYCHECK='func=KEY_CHECK' -TEMPLATE_BUF='template=ima-buf' -REQUIRED_POLICY="^measure.*($FUNC_KEYCHECK.*$TEMPLATE_BUF|$TEMPLATE_BUF.*$FUNC_KEYCHECK)" +REQUIRED_POLICY="^measure.*$FUNC_KEYCHECK" setup() { @@ -28,12 +27,23 @@ cleanup() tst_is_num $KEYRING_ID && keyctl clear $KEYRING_ID } +check_policy_template() +{ + while read line; do + if ( echo $line | grep -q 'template=') && ( ! echo $line | grep -q 'template=ima-buf' ); then + tst_res TCONF "only template=ima-buf can be specified for KEY_CHECK" + return 1 + fi + done < $TST_TMPDIR/policy.txt + return 0 +} + check_keys_policy() { local pattern="$1" if ! grep -E "$pattern" $TST_TMPDIR/policy.txt; then - tst_res TCONF "IMA policy must specify $pattern, $FUNC_KEYCHECK, $TEMPLATE_BUF" + tst_res TCONF "IMA policy must specify $pattern, $FUNC_KEYCHECK" return 1 fi return 0 @@ -49,6 +59,8 @@ test1() tst_res TINFO "verify key measurement for keyrings and templates specified in IMA policy" + check_policy_template || return + check_keys_policy "$pattern" > $tmp_file || return keycheck_lines=$(cat $tmp_file) keyrings=$(for i in $keycheck_lines; do echo "$i" | grep "keyrings" | \ @@ -101,6 +113,8 @@ test2() tst_res TINFO "verify measurement of certificate imported into a keyring" + check_policy_template || return + check_keys_policy "$pattern" >/dev/null || return KEYRING_ID=$(keyctl newring $keyring_name @s) || \