| /* |
| * 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.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/section/filter name |
| * |
| * @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. |
| * <p> |
| * 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"; |
| |
| /** |
| * Prefix for all LFS related filters. |
| * |
| * @since 4.11 |
| */ |
| public static final String ATTR_FILTER_DRIVER_PREFIX = "lfs/"; |
| |
| /** |
| * 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 <a href= |
| * "https://github.com/github/git-lfs/blob/master/docs/api/v1/http-v1-batch.md"> |
| * https://github.com/github/git-lfs/blob/master/docs/api/v1/http-v1-batch.md</a> |
| */ |
| public static final String CONTENT_TYPE_GIT_LFS_JSON = "application/vnd.git-lfs+json"; |
| |
| /** |
| * "Arbitrary binary data" as defined in |
| * <a href="https://www.ietf.org/rfc/rfc2046.txt">RFC 2046</a> |
| */ |
| public static final String HDR_APPLICATION_OCTET_STREAM = "application/octet-stream"; |
| } |