From patchwork Mon Jan 30 22:57:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fan Wu X-Patchwork-Id: 13122017 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92AA1C636D3 for ; Mon, 30 Jan 2023 22:58:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230370AbjA3W6y (ORCPT ); Mon, 30 Jan 2023 17:58:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230091AbjA3W6s (ORCPT ); Mon, 30 Jan 2023 17:58:48 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id AB89B20D1A; Mon, 30 Jan 2023 14:58:45 -0800 (PST) Received: by linux.microsoft.com (Postfix, from userid 1052) id BA5F220EA219; Mon, 30 Jan 2023 14:58:42 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com BA5F220EA219 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675119522; bh=Kx48hiiDSWzOoufluPZBRSxdRqmQO6sj1TtE+pEDBTo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ptpgwa1eoH+Bao3UzUTFYOJb8yu2qloYWMOIMNvWxctUvv1XpQdzN4YhWkdAPwuVE 9EiIVLsZIIEOvfNSbAv/j6SxraBhbK3rqeK6R7aNxRUxhe0UjGIISbg5N9QbnT1T2r Ihol8apa7hd96REMRyuB3fnqkbuSQE6b/4gbhDUY= From: Fan Wu To: corbet@lwn.net, zohar@linux.ibm.com, jmorris@namei.org, serge@hallyn.com, tytso@mit.edu, ebiggers@kernel.org, axboe@kernel.dk, agk@redhat.com, snitzer@kernel.org, eparis@redhat.com, paul@paul-moore.com Cc: linux-doc@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@redhat.com, linux-audit@redhat.com, roberto.sassu@huawei.com, linux-kernel@vger.kernel.org, Deven Bowers , Fan Wu Subject: [RFC PATCH v9 15/16] ipe: kunit test for parser Date: Mon, 30 Jan 2023 14:57:30 -0800 Message-Id: <1675119451-23180-16-git-send-email-wufan@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675119451-23180-1-git-send-email-wufan@linux.microsoft.com> References: <1675119451-23180-1-git-send-email-wufan@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Deven Bowers Add various happy/unhappy unit tests for both IPE's parser. Signed-off-by: Deven Bowers Signed-off-by: Fan Wu --- v1-v6: + Not present v7: Introduced v8: + Remove the kunit tests with respect to the fsverity digest, as these require significant changes to work with the new method of acquiring the digest at runtime. v9: + Remove the kunit tests related to ipe_context --- security/ipe/Kconfig | 17 +++ security/ipe/Makefile | 3 + security/ipe/policy_tests.c | 294 ++++++++++++++++++++++++++++++++++++ 3 files changed, 314 insertions(+) create mode 100644 security/ipe/policy_tests.c diff --git a/security/ipe/Kconfig b/security/ipe/Kconfig index 691fdb9ae60e..79e4fd677c19 100644 --- a/security/ipe/Kconfig +++ b/security/ipe/Kconfig @@ -55,4 +55,21 @@ config IPE_PROP_FS_VERITY endmenu +config SECURITY_IPE_KUNIT_TEST + bool "Build KUnit tests for IPE" if !KUNIT_ALL_TESTS + depends on KUNIT=y + default KUNIT_ALL_TESTS + help + This builds the IPE KUnit tests. + + KUnit tests run during boot and output the results to the debug log + in TAP format (https://testanything.org/). Only useful for kernel devs + running KUnit test harness and are not for inclusion into a + production build. + + For more information on KUnit and unit tests in general please refer + to the KUnit documentation in Documentation/dev-tools/kunit/. + + If unsure, say N. + endif diff --git a/security/ipe/Makefile b/security/ipe/Makefile index e6d5176bc20b..285e0949db25 100644 --- a/security/ipe/Makefile +++ b/security/ipe/Makefile @@ -27,3 +27,6 @@ obj-$(CONFIG_SECURITY_IPE) += \ audit.o \ clean-files := boot-policy.c \ + +obj-$(CONFIG_SECURITY_IPE_KUNIT_TEST) += \ + policy_tests.o \ diff --git a/security/ipe/policy_tests.c b/security/ipe/policy_tests.c new file mode 100644 index 000000000000..d09a1aca863d --- /dev/null +++ b/security/ipe/policy_tests.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) Microsoft Corporation. All rights reserved. + */ + +#include +#include +#include +#include +#include "policy.h" +struct policy_case { + const char *const policy; + int errno; + const char *const desc; +}; + +static const struct policy_case policy_cases[] = { + { + "policy_name=allowall policy_version=0.0.0\n" + "DEFAULT action=ALLOW", + 0, + "basic", + }, + { + "policy_name=trailing_comment policy_version=152.0.0 #This is comment\n" + "DEFAULT action=ALLOW", + 0, + "trailing comment", + }, + { + "policy_name=allowallnewline policy_version=0.2.0\n" + "DEFAULT action=ALLOW\n" + "\n", + 0, + "trailing newline", + }, + { + "policy_name=carriagereturnlinefeed policy_version=0.0.1\n" + "DEFAULT action=ALLOW\n" + "\r\n", + 0, + "clrf newline", + }, + { + "policy_name=whitespace policy_version=0.0.0\n" + "DEFAULT\taction=ALLOW\n" + " \t DEFAULT \t op=EXECUTE action=DENY\n" + "op=EXECUTE boot_verified=TRUE action=ALLOW\n" + "# this is a\tcomment\t\t\t\t\n" + "DEFAULT \t op=KMODULE\t\t\t action=DENY\r\n" + "op=KMODULE boot_verified=TRUE action=ALLOW\n", + 0, + "various whitespaces and nested default", + }, + { + "policy_name=boot_verified policy_version=-1236.0.0\n" + "DEFAULT\taction=ALLOW\n", + -EINVAL, + "negative version", + }, + { + "policy_name=$@!*&^%%\\:;{}() policy_version=0.0.0\n" + "DEFAULT action=ALLOW", + 0, + "special characters", + }, + { + "policy_name=test policy_version=999999.0.0\n" + "DEFAULT action=ALLOW", + -ERANGE, + "overflow version", + }, + { + "policy_name=test policy_version=255.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "incomplete version", + }, + { + "policy_name=test policy_version=111.0.0.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "extra version", + }, + { + "", + -EBADMSG, + "0-length policy", + }, + { + "policy_name=test\0policy_version=0.0.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "random null in header", + }, + { + "policy_name=test policy_version=0.0.0\n" + "\0DEFAULT action=ALLOW", + -EBADMSG, + "incomplete policy from NULL", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=DENY\n\0" + "op=EXECUTE dmverity_signature=TRUE action=ALLOW\n", + 0, + "NULL truncates policy", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_signature=abc action=ALLOW", + -EBADMSG, + "invalid property type", + }, + { + "DEFAULT action=ALLOW", + -EBADMSG, + "missing policy header", + }, + { + "policy_name=test policy_version=0.0.0\n", + -EBADMSG, + "missing default definition", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "dmverity_signature=TRUE op=EXECUTE action=ALLOW", + -EBADMSG, + "invalid rule ordering" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "action=ALLOW op=EXECUTE dmverity_signature=TRUE", + -EBADMSG, + "invalid rule ordering (2)", + }, + { + "policy_name=test policy_version=0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_signature=TRUE action=ALLOW", + -EBADMSG, + "invalid version", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=UNKNOWN dmverity_signature=TRUE action=ALLOW", + -EBADMSG, + "unknown operation", + }, + { + "policy_name=asdvpolicy_version=0.0.0\n" + "DEFAULT action=ALLOW\n", + -EBADMSG, + "missing space after policy name", + }, + { + "policy_name=test\xFF\xEF policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_signature=TRUE action=ALLOW", + 0, + "expanded ascii", + }, + { + "policy_name=test\xFF\xEF policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_roothash=GOOD_DOG action=ALLOW", + -EBADMSG, + "invalid property value (2)", + }, + { + "policy_name=test policy_version=0.0.0\n" + "policy_name=test policy_version=0.1.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "double header" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT action=ALLOW\n", + -EBADMSG, + "double default" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT op=EXECUTE action=DENY\n" + "DEFAULT op=EXECUTE action=ALLOW\n", + -EBADMSG, + "double operation default" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT op=EXECUTE action=DEN\n", + -EBADMSG, + "invalid action value" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT op=EXECUTE action\n", + -EBADMSG, + "invalid action value (2)" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "UNKNOWN value=true\n", + -EBADMSG, + "unrecognized statement" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_roothash=1c0d7ee1f8343b7fbe418378e8eb22c061d7dec7 action=DENY\n", + -EBADMSG, + "old-style digest" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE fsverity_digest=1c0d7ee1f8343b7fbe418378e8eb22c061d7dec7 action=DENY\n", + -EBADMSG, + "old-style digest" + } +}; + +static void pol_to_desc(const struct policy_case *c, char *desc) +{ + strncpy(desc, c->desc, KUNIT_PARAM_DESC_SIZE); +} + +KUNIT_ARRAY_PARAM(ipe_policies, policy_cases, pol_to_desc); + +/** + * ipe_parser_unsigned_test - Test the paser by passing unsigned policies. + * @test: Supplies a pointer to a kunit structure. + * + * This is called by the kunit harness. This test does not check the correctness + * of the policy, but ensures that errors are handled correctly. + */ +static void ipe_parser_unsigned_test(struct kunit *test) +{ + const struct policy_case *p = test->param_value; + struct ipe_policy *pol = ipe_new_policy(p->policy, strlen(p->policy), NULL, 0); + + if (p->errno) { + KUNIT_EXPECT_EQ(test, PTR_ERR(pol), p->errno); + return; + } + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pol); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, pol->parsed); + KUNIT_EXPECT_STREQ(test, pol->text, p->policy); + KUNIT_EXPECT_PTR_EQ(test, NULL, pol->pkcs7); + KUNIT_EXPECT_EQ(test, 0, pol->pkcs7len); + + ipe_free_policy(pol); +} + +/** + * ipe_parser_widestring_test - Ensure parser fail on a wide string policy. + * @test: Supplies a pointer to a kunit structure. + * + * This is called by the kunit harness. + */ +static void ipe_parser_widestring_test(struct kunit *test) +{ + struct ipe_policy *pol = NULL; + const unsigned short policy[] = L"policy_name=Test policy_version=0.0.0\n" + L"DEFAULT action=ALLOW"; + + pol = ipe_new_policy((const char *)policy, (ARRAY_SIZE(policy) - 1) * 2, NULL, 0); + KUNIT_EXPECT_TRUE(test, IS_ERR_OR_NULL(pol)); + + ipe_free_policy(pol); +} + +static struct kunit_case ipe_parser_test_cases[] = { + KUNIT_CASE_PARAM(ipe_parser_unsigned_test, ipe_policies_gen_params), + KUNIT_CASE(ipe_parser_widestring_test), +}; + +static struct kunit_suite ipe_parser_test_suite = { + .name = "ipe-parser", + .test_cases = ipe_parser_test_cases, +}; + +kunit_test_suite(ipe_parser_test_suite);