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/*
* 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.transport.sshd;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.sshd.client.config.hosts.KnownHostEntry;
import org.eclipse.jgit.api.errors.TransportException;
import org.eclipse.jgit.junit.ssh.SshTestBase;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.transport.SshSessionFactory;
import org.eclipse.jgit.util.FS;
import org.junit.Test;
import org.junit.experimental.theories.Theories;
import org.junit.runner.RunWith;
@RunWith(Theories.class)
public class ApacheSshTest extends SshTestBase {
@Override
protected SshSessionFactory createSessionFactory() {
SshdSessionFactory result = new SshdSessionFactory(new JGitKeyCache(),
null);
// The home directory is mocked at this point!
result.setHomeDirectory(FS.DETECTED.userHome());
result.setSshDirectory(sshDir);
return result;
}
@Override
protected void installConfig(String... config) {
File configFile = new File(sshDir, Constants.CONFIG);
if (config != null) {
try {
Files.write(configFile.toPath(), Arrays.asList(config));
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
}
@Test
public void testEd25519HostKey() throws Exception {
// Using ed25519 user identities is tested in the super class in
// testSshKeys().
File newHostKey = new File(getTemporaryDirectory(), "newhostkey");
copyTestResource("id_ed25519", newHostKey);
server.addHostKey(newHostKey.toPath(), true);
File newHostKeyPub = new File(getTemporaryDirectory(),
"newhostkey.pub");
copyTestResource("id_ed25519.pub", newHostKeyPub);
createKnownHostsFile(knownHosts, "localhost", testPort, newHostKeyPub);
cloneWith("ssh://git/doesntmatter", defaultCloneDir, null, //
"Host git", //
"HostName localhost", //
"Port " + testPort, //
"User " + TEST_USER, //
"IdentityFile " + privateKey1.getAbsolutePath());
}
@Test
public void testHashedKnownHosts() throws Exception {
assertTrue("Failed to delete known_hosts", knownHosts.delete());
// The provider will answer "yes" to all questions, so we should be able
// to connect and end up with a new known_hosts file with the host key.
TestCredentialsProvider provider = new TestCredentialsProvider();
cloneWith("ssh://localhost/doesntmatter", defaultCloneDir, provider, //
"HashKnownHosts yes", //
"Host localhost", //
"HostName localhost", //
"Port " + testPort, //
"User " + TEST_USER, //
"IdentityFile " + privateKey1.getAbsolutePath());
List<LogEntry> messages = provider.getLog();
assertFalse("Expected user interaction", messages.isEmpty());
assertEquals(
"Expected to be asked about the key, and the file creation", 2,
messages.size());
assertTrue("~/.ssh/known_hosts should exist now", knownHosts.exists());
// Let's clone again without provider. If it works, the server host key
// was written correctly.
File clonedAgain = new File(getTemporaryDirectory(), "cloned2");
cloneWith("ssh://localhost/doesntmatter", clonedAgain, null, //
"Host localhost", //
"HostName localhost", //
"Port " + testPort, //
"User " + TEST_USER, //
"IdentityFile " + privateKey1.getAbsolutePath());
// Check that the first line contains neither "localhost" nor
// "127.0.0.1", but does contain the expected hash.
List<String> lines = Files.readAllLines(knownHosts.toPath()).stream()
.filter(s -> s != null && s.length() >= 1 && s.charAt(0) != '#'
&& !s.trim().isEmpty())
.collect(Collectors.toList());
assertEquals("Unexpected number of known_hosts lines", 1, lines.size());
String line = lines.get(0);
assertFalse("Found host in line", line.contains("localhost"));
assertFalse("Found IP in line", line.contains("127.0.0.1"));
assertTrue("Hash not found", line.contains("|"));
KnownHostEntry entry = KnownHostEntry.parseKnownHostEntry(line);
assertTrue("Hash doesn't match localhost",
entry.isHostMatch("localhost", testPort)
|| entry.isHostMatch("127.0.0.1", testPort));
}
@Test
public void testPreamble() throws Exception {
// Test that the client can deal with strange lines being sent before
// the server identification string.
StringBuilder b = new StringBuilder();
for (int i = 0; i < 257; i++) {
b.append('a');
}
server.setPreamble("A line with a \000 NUL",
"A long line: " + b.toString());
cloneWith(
"ssh://" + TEST_USER + "@localhost:" + testPort
+ "/doesntmatter",
defaultCloneDir, null,
"IdentityFile " + privateKey1.getAbsolutePath());
}
@Test
public void testLongPreamble() throws Exception {
// Test that the client can deal with a long (about 60k) preamble.
StringBuilder b = new StringBuilder();
for (int i = 0; i < 1024; i++) {
b.append('a');
}
String line = b.toString();
String[] lines = new String[60];
for (int i = 0; i < lines.length; i++) {
lines[i] = line;
}
server.setPreamble(lines);
cloneWith(
"ssh://" + TEST_USER + "@localhost:" + testPort
+ "/doesntmatter",
defaultCloneDir, null,
"IdentityFile " + privateKey1.getAbsolutePath());
}
@Test (expected = TransportException.class)
public void testHugePreamble() throws Exception {
// Test that the connection fails when the preamble is longer than 64k.
StringBuilder b = new StringBuilder();
for (int i = 0; i < 1024; i++) {
b.append('a');
}
String line = b.toString();
String[] lines = new String[70];
for (int i = 0; i < lines.length; i++) {
lines[i] = line;
}
server.setPreamble(lines);
cloneWith(
"ssh://" + TEST_USER + "@localhost:" + testPort
+ "/doesntmatter",
defaultCloneDir, null,
"IdentityFile " + privateKey1.getAbsolutePath());
}
}
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