| /* |
| * Copyright (C) 2015, Google Inc. |
| * 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.transport; |
| |
| import org.eclipse.jgit.lib.Repository; |
| import org.eclipse.jgit.transport.PushCertificate.NonceStatus; |
| |
| /** |
| * A NonceGenerator is used to create a nonce to be sent out to the pusher who |
| * will sign the nonce to prove it is not a replay attack on the push |
| * certificate. |
| * |
| * @since 4.0 |
| */ |
| public interface NonceGenerator { |
| |
| /** |
| * Create nonce to be signed by the pusher |
| * |
| * @param db |
| * The repository which should be used to obtain a unique String |
| * such that the pusher cannot forge nonces by pushing to another |
| * repository at the same time as well and reusing the nonce. |
| * @param timestamp |
| * The current time in seconds. |
| * @return The nonce to be signed by the pusher |
| * @throws java.lang.IllegalStateException |
| */ |
| String createNonce(Repository db, long timestamp) |
| throws IllegalStateException; |
| |
| /** |
| * Verify trustworthiness of the received nonce. |
| * |
| * @param received |
| * The nonce which was received from the server |
| * @param sent |
| * The nonce which was originally sent out to the client. |
| * @param db |
| * The repository which should be used to obtain a unique String |
| * such that the pusher cannot forge nonces by pushing to another |
| * repository at the same time as well and reusing the nonce. |
| * @param allowSlop |
| * If the receiving backend is able to generate slop. This is |
| * the case for serving via http protocol using more than one |
| * http frontend. The client would talk to different http |
| * frontends, which may have a slight difference of time due to |
| * @param slop |
| * If `allowSlop` is true, this specifies the number of seconds |
| * which we allow as slop. |
| * @return a NonceStatus indicating the trustworthiness of the received |
| * nonce. |
| */ |
| NonceStatus verify(String received, String sent, |
| Repository db, boolean allowSlop, int slop); |
| } |