From patchwork Mon Feb 28 07:47:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 12762487 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 295B2C46467 for ; Mon, 28 Feb 2022 07:48:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231740AbiB1Htf (ORCPT ); Mon, 28 Feb 2022 02:49:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231854AbiB1Htd (ORCPT ); Mon, 28 Feb 2022 02:49:33 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 85B043D1DA; Sun, 27 Feb 2022 23:48:55 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0CA1B6106E; Mon, 28 Feb 2022 07:48:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52693C36AE3; Mon, 28 Feb 2022 07:48:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1646034534; bh=ihLUvkE02m6lI4esqM8Hd125A3xtzXTuiFtrNib3XVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Levyra1PYc86mC1p8NL+ce4caM5S6JoIRbOe2EhVXj4/vifBKMEYC9Sn3h5ivHlIW dVDOywO16lu3WEcT5sVtTJm38bqdCOA3ZS6ibDIARv6ST0aZh9O4CVixb+IP/aBuEJ F8FFQ+TsV0UHhxe1w9hVv78YteBHG8j68Xfwh6IWI8Hv52YOLlRjD+QQ26smI2YZ/D qI6l6Ib3MibUKdd1W67YyYfRy2h6nbYFu1Q+HhenBjjVQ0uK9/JMhFRDDJdJ/7KUpt x/OA1RyykYYynwpTW8NOtDWn1lZnlb0cSNRmAqj5P8eiDpWW6BlukavebM9hdlbmef QLl9GLskZVRYA== From: Eric Biggers To: fstests@vger.kernel.org Cc: linux-block@vger.kernel.org, linux-fscrypt@vger.kernel.org, Gaurav Kashyap Subject: [RFC PATCH 5/8] common/encrypt: verify the key identifiers Date: Sun, 27 Feb 2022 23:47:19 -0800 Message-Id: <20220228074722.77008-6-ebiggers@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220228074722.77008-1-ebiggers@kernel.org> References: <20220228074722.77008-1-ebiggers@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org From: Eric Biggers As part of all the ciphertext verification tests, verify that the filesystem correctly computed the key identifier from the key the test generated. This uses fscrypt-crypt-util to compute the key identifier. Previously this was only being tested indirectly, via the tests that happen to use the hardcoded $TEST_RAW_KEY and $TEST_KEY_IDENTIFIER. The new check provides better coverage. Signed-off-by: Eric Biggers --- common/encrypt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/common/encrypt b/common/encrypt index cf402570..d8e2dba9 100644 --- a/common/encrypt +++ b/common/encrypt @@ -902,6 +902,18 @@ _verify_ciphertext_for_encryption_policy() fi local raw_key_hex=$(echo "$raw_key" | tr -d '\\x') + if (( policy_version > 1 )); then + echo "Verifying key identifier" >> $seqres.full + expected_identifier=$($here/src/fscrypt-crypt-util \ + --dump-key-identifier "$raw_key_hex" \ + $crypt_util_args) + if [ "$expected_identifier" != "$keyspec" ]; then + echo "KEY IDENTIFIER MISMATCH!" + echo " Expected: $expected_identifier" + echo " Actual: $keyspec" + fi + fi + echo echo -e "Verifying ciphertext with parameters:" echo -e "\tcontents_encryption_mode: $contents_encryption_mode"