From patchwork Thu Jul 23 01:09:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "brian m. carlson" X-Patchwork-Id: 11679477 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 F0B8F6C1 for ; Thu, 23 Jul 2020 01:10:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D76C220771 for ; Thu, 23 Jul 2020 01:10:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (3072-bit key) header.d=crustytoothpaste.net header.i=@crustytoothpaste.net header.b="N+Fq2ack" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387530AbgGWBJ4 (ORCPT ); Wed, 22 Jul 2020 21:09:56 -0400 Received: from injection.crustytoothpaste.net ([192.241.140.119]:40486 "EHLO injection.crustytoothpaste.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733175AbgGWBJy (ORCPT ); Wed, 22 Jul 2020 21:09:54 -0400 Received: from camp.crustytoothpaste.net (unknown [IPv6:2001:470:b978:101:b610:a2f0:36c1:12e3]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by injection.crustytoothpaste.net (Postfix) with ESMTPSA id 9C6F760AFD for ; Thu, 23 Jul 2020 01:09:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=crustytoothpaste.net; s=default; t=1595466592; bh=xt7+S0YGkL78M65P52Ea3illT0Bx0Eyn9uNik2bjA/k=; h=From:To:Subject:Date:In-Reply-To:References:From:Reply-To:Subject: Date:To:CC:Resent-Date:Resent-From:Resent-To:Resent-Cc:In-Reply-To: References:Content-Type:Content-Disposition; b=N+Fq2ackoe1EjjG8a3TVoCZytyISp7+r8K7Q0u6C/Qssam6BbeS7hvUJtPVnB8LJX /cpZJTpBGJct4YMp+9HWeH2cHmCZgYRN1mqyDimshtXZfJW83HZ1h86IWXuouw2R1k 1Qb2E4GGnpLvSfwo58fAq2fEkVMQ0kb0g3S8hCcbjTNGsg4uGnM5edjNdPnkowBPob NXll2ilYDjtCslnM0luhkJRDnK5paSs5jRi7Nppbj5g78wzCKZQf5xRzzvvqjKPkll 9aIYphESrgCBjCwgoUwc3Z5+87sH/jfL4p0/2hbPpEcsk/ZXGBZyqA19IXq3mz7ot9 F+xXk/Urc/sHs6JsanmcwtPHRWeji32rCmXvvCfiDQU2nWwXDKxqqYYfewNpFs7Htc XTnPXW1Ig+nPTb7B7X8/9ajbZo3z5ZsjTbdhA5Age2u5xGuYa3/s6GDykC3bPko731 d5Eud815t5uzqZ7pYH/svwUXRwYys0WgbwdbMkgYFveiALzzxiE From: "brian m. carlson" To: Subject: [PATCH v3 04/39] t3404: prepare 'short SHA-1 collision' tests for SHA-256 Date: Thu, 23 Jul 2020 01:09:08 +0000 Message-Id: <20200723010943.2329634-5-sandals@crustytoothpaste.net> X-Mailer: git-send-email 2.28.0.rc1.129.ge9626dbbb9f In-Reply-To: <20200723010943.2329634-1-sandals@crustytoothpaste.net> References: <20200723010943.2329634-1-sandals@crustytoothpaste.net> MIME-Version: 1.0 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Johannes Schindelin The idea of the magic value "ac4f2ee" in this test is to make the reworded commit `collide2` have the same shortened ID as the commit `collide3`. To port the same idea to the SHA-256 version of Git, we therefore need another magic value that causes the same collision, but this time with the SHA-256 version of the commit IDs. In this patch, we add code guarded by `GIT_TEST_FIND_COLLIDER` to do exactly that. Essentially, a large number of integers is appended to the commit message "collide2" to find such a collision. To make it easier to find such a collision, we reduce the number of digits to 4. The `t/oid-info/oid` file now lists the values found in that way, and the test cases are modified to use those values. As the tests are no longer dependent on SHA-1, we also rename their titles to talk about "commit IDs" instead of "SHA-1s". Signed-off-by: Johannes Schindelin Signed-off-by: brian m. carlson --- t/t3404-rebase-interactive.sh | 50 ++++++++++++++++++++++++++++------- 1 file changed, 41 insertions(+), 9 deletions(-) diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh index 4a7d21f898..2fb2c581cb 100755 --- a/t/t3404-rebase-interactive.sh +++ b/t/t3404-rebase-interactive.sh @@ -30,6 +30,7 @@ Initial setup: . "$TEST_DIRECTORY"/lib-rebase.sh test_expect_success 'setup' ' + test_oid_init && test_commit A file1 && test_commit B file1 && test_commit C file2 && @@ -1250,7 +1251,7 @@ test_expect_success 'rebase -i error on commits with \ in message' ' test_expect_code 1 grep " emp" error ' -test_expect_success SHA1 'short SHA-1 setup' ' +test_expect_success 'short commit ID setup' ' test_when_finished "git checkout master" && git checkout --orphan collide && git rm -rf . && @@ -1262,23 +1263,54 @@ test_expect_success SHA1 'short SHA-1 setup' ' ) ' -test_expect_success SHA1 'short SHA-1 collide' ' +if test -n "$GIT_TEST_FIND_COLLIDER" +then + author="$(unset test_tick; test_tick; git var GIT_AUTHOR_IDENT)" + committer="$(unset test_tick; test_tick; git var GIT_COMMITTER_IDENT)" + blob="$(git rev-parse collide2:collide)" + from="$(git rev-parse collide1^0)" + repl="commit refs/heads/collider-&\\n" + repl="${repl}author $author\\ncommitter $committer\\n" + repl="${repl}data <script && + git fast-import