/* * Copyright (C) 2015, Matthias Sohn * 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.lib; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.text.MessageFormat; import org.eclipse.jgit.lfs.internal.LfsText; /** * Misc. constants used throughout JGit LFS extension. * * @since 4.3 */ @SuppressWarnings("nls") public final class Constants { /** * lfs folder * * @since 4.6 */ public static final String LFS = "lfs"; /** * Hash function used natively by Git LFS extension for large objects. * * @since 4.6 */ public static final String LONG_HASH_FUNCTION = "SHA-256"; /** * A Git LFS large object hash is 256 bits, i.e. 32 bytes. *

* Changing this assumption is not going to be as easy as changing this * declaration. */ public static final int LONG_OBJECT_ID_LENGTH = 32; /** * A Git LFS large object can be expressed as a 64 character string of * hexadecimal digits. * * @see #LONG_OBJECT_ID_LENGTH */ public static final int LONG_OBJECT_ID_STRING_LENGTH = LONG_OBJECT_ID_LENGTH * 2; /** * LFS upload operation. * * @since 4.7 */ public static final String UPLOAD = "upload"; /** * LFS download operation. * * @since 4.7 */ public static final String DOWNLOAD = "download"; /** * LFS verify operation. * * @since 4.7 */ public static final String VERIFY = "verify"; /** * Create a new digest function for objects. * * @return a new digest object. * @throws java.lang.RuntimeException * this Java virtual machine does not support the required hash * function. Very unlikely given that JGit uses a hash function * that is in the Java reference specification. */ public static MessageDigest newMessageDigest() { try { return MessageDigest.getInstance(LONG_HASH_FUNCTION); } catch (NoSuchAlgorithmException nsae) { throw new RuntimeException(MessageFormat.format( LfsText.get().requiredHashFunctionNotAvailable, LONG_HASH_FUNCTION), nsae); } } static { if (LONG_OBJECT_ID_LENGTH != newMessageDigest().getDigestLength()) throw new LinkageError( LfsText.get().incorrectLONG_OBJECT_ID_LENGTH); } /** * Content type used by LFS REST API as defined in * {@link "https://github.com/github/git-lfs/blob/master/docs/api/v1/http-v1-batch.md"} */ public static final String CONTENT_TYPE_GIT_LFS_JSON = "application/vnd.git-lfs+json"; /** * "arbitrary binary data" as defined in RFC 2046 * {@link "https://www.ietf.org/rfc/rfc2046.txt"} */ public static final String HDR_APPLICATION_OCTET_STREAM = "application/octet-stream"; }