diff options
author | Matthias Sohn <matthias.sohn@sap.com> | 2015-07-17 16:22:56 +0200 |
---|---|---|
committer | Saša Živkov <sasa.zivkov@sap.com> | 2016-02-04 17:49:42 +0100 |
commit | 536db18cc62afab2d38aac5b2af73f575f40d8b6 (patch) | |
tree | 94dccd9b5a11010044efd27f126bd21a94d5a665 /org.eclipse.jgit.lfs.test/src/org | |
parent | 2de33d7678ffe865e44fc5007ee5fc59afa03404 (diff) | |
download | jgit-536db18cc62afab2d38aac5b2af73f575f40d8b6.tar.gz jgit-536db18cc62afab2d38aac5b2af73f575f40d8b6.zip |
Implement SHA-256 abstraction
The Large File Storage extension specified by GitHub [1] uses SHA-256 to
compute the ID of large files stored by the extension. Hence implement a
SHA-256 abstraction similar to the SHA-1 abstraction used by JGit.
[1] https://git-lfs.github.com/
Bug: 470333
Change-Id: I3a95954543c8570d73929e55f4a884b55dbf1b7a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Diffstat (limited to 'org.eclipse.jgit.lfs.test/src/org')
-rw-r--r-- | org.eclipse.jgit.lfs.test/src/org/eclipse/jgit/lfs/test/LongObjectIdTestUtils.java | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/org.eclipse.jgit.lfs.test/src/org/eclipse/jgit/lfs/test/LongObjectIdTestUtils.java b/org.eclipse.jgit.lfs.test/src/org/eclipse/jgit/lfs/test/LongObjectIdTestUtils.java new file mode 100644 index 0000000000..6c6400f293 --- /dev/null +++ b/org.eclipse.jgit.lfs.test/src/org/eclipse/jgit/lfs/test/LongObjectIdTestUtils.java @@ -0,0 +1,94 @@ +/* + * Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com> + * and other copyright owners as documented in the project's IP log. + * + * This program and the accompanying materials are made available + * under the terms of the Eclipse Distribution License v1.0 which + * accompanies this distribution, is reproduced below, and is + * available at http://www.eclipse.org/org/documents/edl-v10.php + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * - Neither the name of the Eclipse Foundation, Inc. nor the + * names of its contributors may be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND + * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +package org.eclipse.jgit.lfs.test; + +import java.io.BufferedInputStream; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.InputStream; +import java.nio.charset.StandardCharsets; +import java.nio.file.Files; +import java.nio.file.Path; +import java.security.MessageDigest; + +import org.eclipse.jgit.lfs.lib.Constants; +import org.eclipse.jgit.lfs.lib.LongObjectId; + +public class LongObjectIdTestUtils { + + /** + * Create id as hash of the given string. + * + * @param s + * the string to hash + * @return id calculated by hashing string + */ + public static LongObjectId hash(String s) { + MessageDigest md = Constants.newMessageDigest(); + md.update(s.getBytes(StandardCharsets.UTF_8)); + return LongObjectId.fromRaw(md.digest()); + } + + /** + * Create id as hash of a file content + * + * @param file + * the file to hash + * @return id calculated by hashing file content + * @throws FileNotFoundException + * if file doesn't exist + * @throws IOException + */ + public static LongObjectId hash(Path file) + throws FileNotFoundException, IOException { + MessageDigest md = Constants.newMessageDigest(); + try (InputStream is = new BufferedInputStream( + Files.newInputStream(file))) { + final byte[] buffer = new byte[4096]; + for (int read = 0; (read = is.read(buffer)) != -1;) { + md.update(buffer, 0, read); + } + } + return LongObjectId.fromRaw(md.digest()); + } +} |