| /* |
| * Copyright (C) 2018, Thomas Wolf <thomas.wolf@paranor.ch> 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.internal.transport.sshd; |
| |
| import java.util.concurrent.CancellationException; |
| |
| import org.apache.sshd.client.ClientAuthenticationManager; |
| import org.apache.sshd.client.auth.keyboard.UserInteraction; |
| import org.apache.sshd.client.auth.password.UserAuthPassword; |
| import org.apache.sshd.client.session.ClientSession; |
| |
| /** |
| * A password authentication handler that uses the {@link JGitUserInteraction} |
| * to ask the user for the password. It also respects the |
| * {@code NumberOfPasswordPrompts} ssh config. |
| */ |
| public class JGitPasswordAuthentication extends UserAuthPassword { |
| |
| private int maxAttempts; |
| |
| private int attempts; |
| |
| @Override |
| public void init(ClientSession session, String service) throws Exception { |
| super.init(session, service); |
| maxAttempts = Math.max(1, |
| session.getIntProperty( |
| ClientAuthenticationManager.PASSWORD_PROMPTS, |
| ClientAuthenticationManager.DEFAULT_PASSWORD_PROMPTS)); |
| attempts = 0; |
| } |
| |
| @Override |
| protected boolean sendAuthDataRequest(ClientSession session, String service) |
| throws Exception { |
| if (++attempts > maxAttempts) { |
| return false; |
| } |
| UserInteraction interaction = session.getUserInteraction(); |
| if (!interaction.isInteractionAllowed(session)) { |
| return false; |
| } |
| String password = getPassword(session, interaction); |
| if (password == null) { |
| throw new CancellationException(); |
| } |
| // sendPassword takes a buffer as first argument, but actually doesn't |
| // use it and creates its own buffer... |
| sendPassword(null, session, password, password); |
| return true; |
| } |
| |
| private String getPassword(ClientSession session, |
| UserInteraction interaction) { |
| String[] results = interaction.interactive(session, null, null, "", //$NON-NLS-1$ |
| new String[] { SshdText.get().passwordPrompt }, |
| new boolean[] { false }); |
| return (results == null || results.length == 0) ? null : results[0]; |
| } |
| } |