| /* |
| * Copyright (C) 2015, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| 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 |
| */ |
| String createNonce(Repository db, long timestamp); |
| |
| /** |
| * 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); |
| } |