From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT 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 5958AC00319 for ; Thu, 21 Feb 2019 05:31:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2370F218C3 for ; Thu, 21 Feb 2019 05:31:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550727064; bh=L/8mT/YN7JwwFH4tx9u4eaeOEk1tUKKnDtW3DjJSUuA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YjRzHWYal0rpaUsX2Xcukql55IeJ28AUthpZ1BDVIQY/V8NCj68HcFXPlgKn2J8r9 Z3dkpYQ+WwKJ6OuXRhNB4MJc4g5lUwNta5klEaHhigu0FbAj0dCQypC288mUNFjMhv 4Y2t5ulvQc2TSDtR95bCnpDnYWjpLO5P/PBC84aE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725891AbfBUFbD (ORCPT ); Thu, 21 Feb 2019 00:31:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:58302 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725831AbfBUFbD (ORCPT ); Thu, 21 Feb 2019 00:31:03 -0500 Received: from sol.localdomain (c-107-3-167-184.hsd1.ca.comcast.net [107.3.167.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7985B21734; Thu, 21 Feb 2019 05:31:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550727062; bh=L/8mT/YN7JwwFH4tx9u4eaeOEk1tUKKnDtW3DjJSUuA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ir6ORDvKNF0c2O455JtUYJfCk59AhGxDHf4P/DOiW6DAwcPFZ5DoyJpg3toN5uxO+ /b8SwFFv6EhP0TM4FVBF64FAEHqfCKb9xMLoDa7HL2oUv7n2O1COzuEYmXmmIM6Dsd jmnc9+x7Qmzn013l6B+hFvbMeKmodvnRevGLK7ek= From: Eric Biggers To: ltp@lists.linux.it Cc: linux-crypto@vger.kernel.org Subject: [PATCH 2/6] crypto/af_alg01: new regression test for hmac nesting bug Date: Wed, 20 Feb 2019 21:30:22 -0800 Message-Id: <20190221053026.18489-3-ebiggers@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190221053026.18489-1-ebiggers@kernel.org> References: <20190221053026.18489-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Eric Biggers Signed-off-by: Eric Biggers --- runtest/cve | 1 + testcases/kernel/crypto/.gitignore | 1 + testcases/kernel/crypto/af_alg01.c | 79 ++++++++++++++++++++++++++++++ 3 files changed, 81 insertions(+) create mode 100644 testcases/kernel/crypto/af_alg01.c diff --git a/runtest/cve b/runtest/cve index 8f38045e9a..f46c400cc4 100644 --- a/runtest/cve +++ b/runtest/cve @@ -27,6 +27,7 @@ cve-2017-15299 request_key03 -b cve-2017-15299 cve-2017-15537 ptrace07 cve-2017-15649 fanout01 cve-2017-15951 request_key03 -b cve-2017-15951 +cve-2017-17806 af_alg01 cve-2017-17807 request_key04 cve-2017-1000364 stack_clash cve-2017-5754 meltdown diff --git a/testcases/kernel/crypto/.gitignore b/testcases/kernel/crypto/.gitignore index 759592fbdf..998af17284 100644 --- a/testcases/kernel/crypto/.gitignore +++ b/testcases/kernel/crypto/.gitignore @@ -1,2 +1,3 @@ +af_alg01 pcrypt_aead01 crypto_user01 diff --git a/testcases/kernel/crypto/af_alg01.c b/testcases/kernel/crypto/af_alg01.c new file mode 100644 index 0000000000..79b61de279 --- /dev/null +++ b/testcases/kernel/crypto/af_alg01.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2019 Google LLC + */ + +/* + * Regression test for commit af3ff8045bbf ("crypto: hmac - require that the + * underlying hash algorithm is unkeyed"), or CVE-2017-17806. This test + * verifies that the hmac template cannot be nested inside itself. + */ + +#include +#include + +#include "tst_test.h" +#include "tst_af_alg.h" + +static void test_with_hash_alg(const char *hash_algname) +{ + char hmac_algname[64]; + char key[4096] = { 0 }; + + if (!tst_have_alg("hash", hash_algname)) { + tst_res(TCONF, "kernel doesn't have hash algorithm '%s'", + hash_algname); + return; + } + sprintf(hmac_algname, "hmac(%s)", hash_algname); + if (!tst_have_alg("hash", hmac_algname)) { + tst_res(TCONF, "kernel doesn't have hash algorithm '%s'", + hmac_algname); + return; + } + + sprintf(hmac_algname, "hmac(hmac(%s))", hash_algname); + if (tst_have_alg("hash", hmac_algname)) { + int algfd; + + tst_res(TFAIL, "instantiated nested hmac algorithm ('%s')!", + hmac_algname); + + /* + * Be extra annoying; with the bug, setting a key on + * "hmac(hmac(sha3-256-generic))" crashed the kernel. + */ + algfd = tst_alg_setup("hash", hmac_algname, NULL, 0); + if (setsockopt(algfd, SOL_ALG, ALG_SET_KEY, + key, sizeof(key)) == 0) { + tst_res(TFAIL, + "set key on nested hmac algorithm ('%s')!", + hmac_algname); + } + } else { + tst_res(TPASS, + "couldn't instantiate nested hmac algorithm ('%s')", + hmac_algname); + } +} + +static void run(void) +{ + /* try several different unkeyed hash algorithms */ + static const char * const hash_algs[] = { + "md5", "md5-generic", + "sha1", "sha1-generic", + "sha224", "sha224-generic", + "sha256", "sha256-generic", + "sha3-256", "sha3-256-generic", + "sha3-512", "sha3-512-generic", + }; + size_t i; + + for (i = 0; i < ARRAY_SIZE(hash_algs); i++) + test_with_hash_alg(hash_algs[i]); +} + +static struct tst_test test = { + .test_all = run, +}; -- 2.20.1