org.eclipse.jgit.ssh.jsch.test/tst/org/eclipse/jgit/transport/OpenSshConfigTest.java - jgit - Git at Google

 /*
  * Copyright (C) 2008, 2017 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
  */

 //TODO(ms): move to org.eclipse.jgit.ssh.jsch in 6.0
 package org.eclipse.jgit.transport;

 import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNotSame;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;

 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.time.Instant;
 import java.util.concurrent.TimeUnit;

 import org.eclipse.jgit.junit.RepositoryTestCase;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.transport.OpenSshConfig.Host;
 import org.eclipse.jgit.util.FS;
 import org.eclipse.jgit.util.FileUtils;
 import org.eclipse.jgit.util.SystemReader;
 import org.junit.Before;
 import org.junit.Test;

 import com.jcraft.jsch.ConfigRepository;
 import com.jcraft.jsch.ConfigRepository.Config;

 public class OpenSshConfigTest extends RepositoryTestCase {
 	private File home;

 	private File configFile;

 	private OpenSshConfig osc;

 	@Override
 	@Before
 	public void setUp() throws Exception {
 		super.setUp();

 		home = new File(trash, "home");
 		FileUtils.mkdir(home);

 		configFile = new File(new File(home, ".ssh"), Constants.CONFIG);
 		FileUtils.mkdir(configFile.getParentFile());

 		mockSystemReader.setProperty(Constants.OS_USER_NAME_KEY, "jex_junit");
 		mockSystemReader.setProperty("TST_VAR", "TEST");
 		osc = new OpenSshConfig(home, configFile);
 	}

 	private void config(String data) throws IOException {
 		FS fs = FS.DETECTED;
 		long resolution = FS.getFileStoreAttributes(configFile.toPath())
 				.getFsTimestampResolution().toNanos();
 		Instant lastMtime = fs.lastModifiedInstant(configFile);
 		do {
 			try (final OutputStreamWriter fw = new OutputStreamWriter(
 					new FileOutputStream(configFile), UTF_8)) {
 				fw.write(data);
 				TimeUnit.NANOSECONDS.sleep(resolution);
 			} catch (InterruptedException e) {
 				Thread.interrupted();
 			}
 		} while (lastMtime.equals(fs.lastModifiedInstant(configFile)));
 	}

 	@Test
 	public void testNoConfig() {
 		final Host h = osc.lookup("repo.or.cz");
 		assertNotNull(h);
 		assertEquals("repo.or.cz", h.getHostName());
 		assertEquals("jex_junit", h.getUser());
 		assertEquals(22, h.getPort());
 		assertEquals(1, h.getConnectionAttempts());
 		assertNull(h.getIdentityFile());
 	}

 	@Test
 	public void testSeparatorParsing() throws Exception {
 		config("Host\tfirst\n" +
 		       "\tHostName\tfirst.tld\n" +
 		       "\n" +
 		       "Host second\n" +
 		       " HostName\tsecond.tld\n" +
 		       "Host=third\n" +
 		       "HostName=third.tld\n\n\n" +
 		       "\t Host = fourth\n\n\n" +
 		       " \t HostName\t=fourth.tld\n" +
 		       "Host\t =     last\n" +
 		       "HostName  \t    last.tld");
 		assertNotNull(osc.lookup("first"));
 		assertEquals("first.tld", osc.lookup("first").getHostName());
 		assertNotNull(osc.lookup("second"));
 		assertEquals("second.tld", osc.lookup("second").getHostName());
 		assertNotNull(osc.lookup("third"));
 		assertEquals("third.tld", osc.lookup("third").getHostName());
 		assertNotNull(osc.lookup("fourth"));
 		assertEquals("fourth.tld", osc.lookup("fourth").getHostName());
 		assertNotNull(osc.lookup("last"));
 		assertEquals("last.tld", osc.lookup("last").getHostName());
 	}

 	@Test
 	public void testQuoteParsing() throws Exception {
 		config("Host \"good\"\n" +
 			" HostName=\"good.tld\"\n" +
 			" Port=\"6007\"\n" +
 			" User=\"gooduser\"\n" +
 			"Host multiple unquoted and \"quoted\" \"hosts\"\n" +
 			" Port=\"2222\"\n" +
 			"Host \"spaced\"\n" +
 			"# Bad host name, but testing preservation of spaces\n" +
 			" HostName=\" spaced\ttld \"\n" +
 			"# Misbalanced quotes\n" +
 			"Host \"bad\"\n" +
 			"# OpenSSH doesn't allow this but ...\n" +
 			" HostName=bad.tld\"\n");
 		assertEquals("good.tld", osc.lookup("good").getHostName());
 		assertEquals("gooduser", osc.lookup("good").getUser());
 		assertEquals(6007, osc.lookup("good").getPort());
 		assertEquals(2222, osc.lookup("multiple").getPort());
 		assertEquals(2222, osc.lookup("quoted").getPort());
 		assertEquals(2222, osc.lookup("and").getPort());
 		assertEquals(2222, osc.lookup("unquoted").getPort());
 		assertEquals(2222, osc.lookup("hosts").getPort());
 		assertEquals(" spaced\ttld ", osc.lookup("spaced").getHostName());
 		assertEquals("bad.tld\"", osc.lookup("bad").getHostName());
 	}

 	@Test
 	public void testCaseInsensitiveKeyLookup() throws Exception {
 		config("Host orcz\n" + "Port 29418\n"
 				+ "\tHostName repo.or.cz\nStrictHostKeyChecking yes\n");
 		final Host h = osc.lookup("orcz");
 		Config c = h.getConfig();
 		String exactCase = c.getValue("StrictHostKeyChecking");
 		assertEquals("yes", exactCase);
 		assertEquals(exactCase, c.getValue("stricthostkeychecking"));
 		assertEquals(exactCase, c.getValue("STRICTHOSTKEYCHECKING"));
 		assertEquals(exactCase, c.getValue("sTrIcThostKEYcheckING"));
 		assertNull(c.getValue("sTrIcThostKEYcheckIN"));
 	}

 	@Test
 	public void testAlias_DoesNotMatch() throws Exception {
 		config("Host orcz\n" + "Port 29418\n" + "\tHostName repo.or.cz\n");
 		final Host h = osc.lookup("repo.or.cz");
 		assertNotNull(h);
 		assertEquals("repo.or.cz", h.getHostName());
 		assertEquals("jex_junit", h.getUser());
 		assertEquals(22, h.getPort());
 		assertNull(h.getIdentityFile());
 		final Host h2 = osc.lookup("orcz");
 		assertEquals("repo.or.cz", h.getHostName());
 		assertEquals("jex_junit", h.getUser());
 		assertEquals(29418, h2.getPort());
 		assertNull(h.getIdentityFile());
 	}

 	@Test
 	public void testAlias_OptionsSet() throws Exception {
 		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\tPort 2222\n"
 				+ "\tUser jex\n" + "\tIdentityFile .ssh/id_jex\n"
 				+ "\tForwardX11 no\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("repo.or.cz", h.getHostName());
 		assertEquals("jex", h.getUser());
 		assertEquals(2222, h.getPort());
 		assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
 	}

 	@Test
 	public void testAlias_OptionsKeywordCaseInsensitive() throws Exception {
 		config("hOsT orcz\n" + "\thOsTnAmE repo.or.cz\n" + "\tPORT 2222\n"
 				+ "\tuser jex\n" + "\tidentityfile .ssh/id_jex\n"
 				+ "\tForwardX11 no\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("repo.or.cz", h.getHostName());
 		assertEquals("jex", h.getUser());
 		assertEquals(2222, h.getPort());
 		assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
 	}

 	@Test
 	public void testAlias_OptionsInherit() throws Exception {
 		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
 				+ "\tHostName not.a.host.example.com\n" + "\tPort 2222\n"
 				+ "\tUser jex\n" + "\tIdentityFile .ssh/id_jex\n"
 				+ "\tForwardX11 no\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("repo.or.cz", h.getHostName());
 		assertEquals("jex", h.getUser());
 		assertEquals(2222, h.getPort());
 		assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
 	}

 	@Test
 	public void testAlias_PreferredAuthenticationsDefault() throws Exception {
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertNull(h.getPreferredAuthentications());
 	}

 	@Test
 	public void testAlias_PreferredAuthentications() throws Exception {
 		config("Host orcz\n" + "\tPreferredAuthentications publickey\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("publickey", h.getPreferredAuthentications());
 	}

 	@Test
 	public void testAlias_InheritPreferredAuthentications() throws Exception {
 		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
 				+ "\tPreferredAuthentications publickey, hostbased\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("publickey,hostbased", h.getPreferredAuthentications());
 	}

 	@Test
 	public void testAlias_BatchModeDefault() throws Exception {
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertFalse(h.isBatchMode());
 	}

 	@Test
 	public void testAlias_BatchModeYes() throws Exception {
 		config("Host orcz\n" + "\tBatchMode yes\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertTrue(h.isBatchMode());
 	}

 	@Test
 	public void testAlias_InheritBatchMode() throws Exception {
 		config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
 				+ "\tBatchMode yes\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertTrue(h.isBatchMode());
 	}

 	@Test
 	public void testAlias_ConnectionAttemptsDefault() throws Exception {
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(1, h.getConnectionAttempts());
 	}

 	@Test
 	public void testAlias_ConnectionAttempts() throws Exception {
 		config("Host orcz\n" + "\tConnectionAttempts 5\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(5, h.getConnectionAttempts());
 	}

 	@Test
 	public void testAlias_invalidConnectionAttempts() throws Exception {
 		config("Host orcz\n" + "\tConnectionAttempts -1\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(1, h.getConnectionAttempts());
 	}

 	@Test
 	public void testAlias_badConnectionAttempts() throws Exception {
 		config("Host orcz\n" + "\tConnectionAttempts xxx\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(1, h.getConnectionAttempts());
 	}

 	@Test
 	public void testDefaultBlock() throws Exception {
 		config("ConnectionAttempts 5\n\nHost orcz\nConnectionAttempts 3\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(5, h.getConnectionAttempts());
 	}

 	@Test
 	public void testHostCaseInsensitive() throws Exception {
 		config("hOsT orcz\nConnectionAttempts 3\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(3, h.getConnectionAttempts());
 	}

 	@Test
 	public void testListValueSingle() throws Exception {
 		config("Host orcz\nUserKnownHostsFile /foo/bar\n");
 		final ConfigRepository.Config c = osc.getConfig("orcz");
 		assertNotNull(c);
 		assertEquals("/foo/bar", c.getValue("UserKnownHostsFile"));
 	}

 	@Test
 	public void testListValueMultiple() throws Exception {
 		// Tilde expansion occurs within the parser
 		config("Host orcz\nUserKnownHostsFile \"~/foo/ba z\" /foo/bar \n");
 		final ConfigRepository.Config c = osc.getConfig("orcz");
 		assertNotNull(c);
 		assertArrayEquals(new Object[] { new File(home, "foo/ba z").getPath(),
 				"/foo/bar" },
 				c.getValues("UserKnownHostsFile"));
 	}

 	@Test
 	public void testRepeatedLookupsWithModification() throws Exception {
 		config("Host orcz\n" + "\tConnectionAttempts -1\n");
 		final Host h1 = osc.lookup("orcz");
 		assertNotNull(h1);
 		assertEquals(1, h1.getConnectionAttempts());
 		config("Host orcz\n" + "\tConnectionAttempts 5\n");
 		final Host h2 = osc.lookup("orcz");
 		assertNotNull(h2);
 		assertNotSame(h1, h2);
 		assertEquals(5, h2.getConnectionAttempts());
 		assertEquals(1, h1.getConnectionAttempts());
 		assertNotSame(h1.getConfig(), h2.getConfig());
 	}

 	@Test
 	public void testIdentityFile() throws Exception {
 		config("Host orcz\nIdentityFile \"~/foo/ba z\"\nIdentityFile /foo/bar");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		File f = h.getIdentityFile();
 		assertNotNull(f);
 		// Host does tilde replacement
 		assertEquals(new File(home, "foo/ba z"), f);
 		final ConfigRepository.Config c = h.getConfig();
 		// Config does tilde replacement, too
 		assertArrayEquals(new Object[] { new File(home, "foo/ba z").getPath(),
 				"/foo/bar" },
 				c.getValues("IdentityFile"));
 	}

 	@Test
 	public void testMultiIdentityFile() throws Exception {
 		config("IdentityFile \"~/foo/ba z\"\nHost orcz\nIdentityFile /foo/bar\nHOST *\nIdentityFile /foo/baz");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		File f = h.getIdentityFile();
 		assertNotNull(f);
 		// Host does tilde replacement
 		assertEquals(new File(home, "foo/ba z"), f);
 		final ConfigRepository.Config c = h.getConfig();
 		// Config does tilde replacement, too
 		assertArrayEquals(new Object[] { new File(home, "foo/ba z").getPath(),
 				"/foo/bar", "/foo/baz" },
 				c.getValues("IdentityFile"));
 	}

 	@Test
 	public void testNegatedPattern() throws Exception {
 		config("Host repo.or.cz\nIdentityFile ~/foo/bar\nHOST !*.or.cz\nIdentityFile /foo/baz");
 		final Host h = osc.lookup("repo.or.cz");
 		assertNotNull(h);
 		assertEquals(new File(home, "foo/bar"), h.getIdentityFile());
 		assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath() },
 				h.getConfig().getValues("IdentityFile"));
 	}

 	@Test
 	public void testPattern() throws Exception {
 		config("Host repo.or.cz\nIdentityFile ~/foo/bar\nHOST *.or.cz\nIdentityFile /foo/baz");
 		final Host h = osc.lookup("repo.or.cz");
 		assertNotNull(h);
 		assertEquals(new File(home, "foo/bar"), h.getIdentityFile());
 		assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath(),
 				"/foo/baz" },
 				h.getConfig().getValues("IdentityFile"));
 	}

 	@Test
 	public void testMultiHost() throws Exception {
 		config("Host orcz *.or.cz\nIdentityFile ~/foo/bar\nHOST *.or.cz\nIdentityFile /foo/baz");
 		final Host h1 = osc.lookup("repo.or.cz");
 		assertNotNull(h1);
 		assertEquals(new File(home, "foo/bar"), h1.getIdentityFile());
 		assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath(),
 				"/foo/baz" },
 				h1.getConfig().getValues("IdentityFile"));
 		final Host h2 = osc.lookup("orcz");
 		assertNotNull(h2);
 		assertEquals(new File(home, "foo/bar"), h2.getIdentityFile());
 		assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath() },
 				h2.getConfig().getValues("IdentityFile"));
 	}

 	@Test
 	public void testEqualsSign() throws Exception {
 		config("Host=orcz\n\tConnectionAttempts = 5\n\tUser=\t  foobar\t\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(5, h.getConnectionAttempts());
 		assertEquals("foobar", h.getUser());
 	}

 	@Test
 	public void testMissingArgument() throws Exception {
 		config("Host=orcz\n\tSendEnv\nIdentityFile\t\nForwardX11\n\tUser=\t  foobar\t\n");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("foobar", h.getUser());
 		assertArrayEquals(new String[0], h.getConfig().getValues("SendEnv"));
 		assertNull(h.getIdentityFile());
 		assertNull(h.getConfig().getValue("ForwardX11"));
 	}

 	@Test
 	public void testHomeDirUserReplacement() throws Exception {
 		config("Host=orcz\n\tIdentityFile %d/.ssh/%u_id_dsa");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(new File(new File(home, ".ssh"), "jex_junit_id_dsa"),
 				h.getIdentityFile());
 	}

 	@Test
 	public void testHostnameReplacement() throws Exception {
 		config("Host=orcz\nHost *.*\n\tHostname %h\nHost *\n\tHostname %h.example.org");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals("orcz.example.org", h.getHostName());
 	}

 	@Test
 	public void testRemoteUserReplacement() throws Exception {
 		config("Host=orcz\n\tUser foo\n" + "Host *.*\n\tHostname %h\n"
 				+ "Host *\n\tHostname %h.ex%%20ample.org\n\tIdentityFile ~/.ssh/%h_%r_id_dsa");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(
 				new File(new File(home, ".ssh"),
 						"orcz.ex%20ample.org_foo_id_dsa"),
 				h.getIdentityFile());
 	}

 	@Test
 	public void testLocalhostFQDNReplacement() throws Exception {
 		String localhost = SystemReader.getInstance().getHostname();
 		config("Host=orcz\n\tIdentityFile ~/.ssh/%l_id_dsa");
 		final Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		assertEquals(
 				new File(new File(home, ".ssh"), localhost + "_id_dsa"),
 				h.getIdentityFile());
 	}

 	@Test
 	public void testPubKeyAcceptedAlgorithms() throws Exception {
 		config("Host=orcz\n\tPubkeyAcceptedAlgorithms ^ssh-rsa");
 		Host h = osc.lookup("orcz");
 		Config c = h.getConfig();
 		assertEquals("^ssh-rsa",
 				c.getValue(SshConstants.PUBKEY_ACCEPTED_ALGORITHMS));
 		assertEquals("^ssh-rsa", c.getValue("PubkeyAcceptedKeyTypes"));
 	}

 	@Test
 	public void testPubKeyAcceptedKeyTypes() throws Exception {
 		config("Host=orcz\n\tPubkeyAcceptedKeyTypes ^ssh-rsa");
 		Host h = osc.lookup("orcz");
 		Config c = h.getConfig();
 		assertEquals("^ssh-rsa",
 				c.getValue(SshConstants.PUBKEY_ACCEPTED_ALGORITHMS));
 		assertEquals("^ssh-rsa", c.getValue("PubkeyAcceptedKeyTypes"));
 	}

 	@Test
 	public void testEolComments() throws Exception {
 		config("#Comment\nHost=orcz #Comment\n\tPubkeyAcceptedAlgorithms ^ssh-rsa # Comment\n#Comment");
 		Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		Config c = h.getConfig();
 		assertEquals("^ssh-rsa",
 				c.getValue(SshConstants.PUBKEY_ACCEPTED_ALGORITHMS));
 	}

 	@Test
 	public void testEnVarSubstitution() throws Exception {
 		config("Host orcz\nIdentityFile /tmp/${TST_VAR}\n"
 				+ "CertificateFile /tmp/${}/foo\nUser ${TST_VAR}\nIdentityAgent /tmp/${TST_VAR/bar");
 		Host h = osc.lookup("orcz");
 		assertNotNull(h);
 		Config c = h.getConfig();
 		assertEquals("/tmp/TEST",
 				c.getValue(SshConstants.IDENTITY_FILE));
 		// No variable name
 		assertEquals("/tmp/${}/foo", c.getValue(SshConstants.CERTIFICATE_FILE));
 		// User doesn't get env var substitution:
 		assertEquals("${TST_VAR}", c.getValue(SshConstants.USER));
 		assertEquals("${TST_VAR}", h.getUser());
 		// Unterminated:
 		assertEquals("/tmp/${TST_VAR/bar",
 				c.getValue(SshConstants.IDENTITY_AGENT));
 	}
 }
	/*
	* Copyright (C) 2008, 2017 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
	*/

	//TODO(ms): move to org.eclipse.jgit.ssh.jsch in 6.0
	package org.eclipse.jgit.transport;

	import static java.nio.charset.StandardCharsets.UTF_8;
	import static org.junit.Assert.assertArrayEquals;
	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertNotNull;
	import static org.junit.Assert.assertNotSame;
	import static org.junit.Assert.assertNull;
	import static org.junit.Assert.assertTrue;

	import java.io.File;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.io.OutputStreamWriter;
	import java.time.Instant;
	import java.util.concurrent.TimeUnit;

	import org.eclipse.jgit.junit.RepositoryTestCase;
	import org.eclipse.jgit.lib.Constants;
	import org.eclipse.jgit.transport.OpenSshConfig.Host;
	import org.eclipse.jgit.util.FS;
	import org.eclipse.jgit.util.FileUtils;
	import org.eclipse.jgit.util.SystemReader;
	import org.junit.Before;
	import org.junit.Test;

	import com.jcraft.jsch.ConfigRepository;
	import com.jcraft.jsch.ConfigRepository.Config;

	public class OpenSshConfigTest extends RepositoryTestCase {
	private File home;

	private File configFile;

	private OpenSshConfig osc;

	@Override
	@Before
	public void setUp() throws Exception {
	super.setUp();

	home = new File(trash, "home");
	FileUtils.mkdir(home);

	configFile = new File(new File(home, ".ssh"), Constants.CONFIG);
	FileUtils.mkdir(configFile.getParentFile());

	mockSystemReader.setProperty(Constants.OS_USER_NAME_KEY, "jex_junit");
	mockSystemReader.setProperty("TST_VAR", "TEST");
	osc = new OpenSshConfig(home, configFile);
	}

	private void config(String data) throws IOException {
	FS fs = FS.DETECTED;
	long resolution = FS.getFileStoreAttributes(configFile.toPath())
	.getFsTimestampResolution().toNanos();
	Instant lastMtime = fs.lastModifiedInstant(configFile);
	do {
	try (final OutputStreamWriter fw = new OutputStreamWriter(
	new FileOutputStream(configFile), UTF_8)) {
	fw.write(data);
	TimeUnit.NANOSECONDS.sleep(resolution);
	} catch (InterruptedException e) {
	Thread.interrupted();
	}
	} while (lastMtime.equals(fs.lastModifiedInstant(configFile)));
	}

	@Test
	public void testNoConfig() {
	final Host h = osc.lookup("repo.or.cz");
	assertNotNull(h);
	assertEquals("repo.or.cz", h.getHostName());
	assertEquals("jex_junit", h.getUser());
	assertEquals(22, h.getPort());
	assertEquals(1, h.getConnectionAttempts());
	assertNull(h.getIdentityFile());
	}

	@Test
	public void testSeparatorParsing() throws Exception {
	config("Host\tfirst\n" +
	"\tHostName\tfirst.tld\n" +
	"\n" +
	"Host second\n" +
	" HostName\tsecond.tld\n" +
	"Host=third\n" +
	"HostName=third.tld\n\n\n" +
	"\t Host = fourth\n\n\n" +
	" \t HostName\t=fourth.tld\n" +
	"Host\t = last\n" +
	"HostName \t last.tld");
	assertNotNull(osc.lookup("first"));
	assertEquals("first.tld", osc.lookup("first").getHostName());
	assertNotNull(osc.lookup("second"));
	assertEquals("second.tld", osc.lookup("second").getHostName());
	assertNotNull(osc.lookup("third"));
	assertEquals("third.tld", osc.lookup("third").getHostName());
	assertNotNull(osc.lookup("fourth"));
	assertEquals("fourth.tld", osc.lookup("fourth").getHostName());
	assertNotNull(osc.lookup("last"));
	assertEquals("last.tld", osc.lookup("last").getHostName());
	}

	@Test
	public void testQuoteParsing() throws Exception {
	config("Host \"good\"\n" +
	" HostName=\"good.tld\"\n" +
	" Port=\"6007\"\n" +
	" User=\"gooduser\"\n" +
	"Host multiple unquoted and \"quoted\" \"hosts\"\n" +
	" Port=\"2222\"\n" +
	"Host \"spaced\"\n" +
	"# Bad host name, but testing preservation of spaces\n" +
	" HostName=\" spaced\ttld \"\n" +
	"# Misbalanced quotes\n" +
	"Host \"bad\"\n" +
	"# OpenSSH doesn't allow this but ...\n" +
	" HostName=bad.tld\"\n");
	assertEquals("good.tld", osc.lookup("good").getHostName());
	assertEquals("gooduser", osc.lookup("good").getUser());
	assertEquals(6007, osc.lookup("good").getPort());
	assertEquals(2222, osc.lookup("multiple").getPort());
	assertEquals(2222, osc.lookup("quoted").getPort());
	assertEquals(2222, osc.lookup("and").getPort());
	assertEquals(2222, osc.lookup("unquoted").getPort());
	assertEquals(2222, osc.lookup("hosts").getPort());
	assertEquals(" spaced\ttld ", osc.lookup("spaced").getHostName());
	assertEquals("bad.tld\"", osc.lookup("bad").getHostName());
	}

	@Test
	public void testCaseInsensitiveKeyLookup() throws Exception {
	config("Host orcz\n" + "Port 29418\n"
	+ "\tHostName repo.or.cz\nStrictHostKeyChecking yes\n");
	final Host h = osc.lookup("orcz");
	Config c = h.getConfig();
	String exactCase = c.getValue("StrictHostKeyChecking");
	assertEquals("yes", exactCase);
	assertEquals(exactCase, c.getValue("stricthostkeychecking"));
	assertEquals(exactCase, c.getValue("STRICTHOSTKEYCHECKING"));
	assertEquals(exactCase, c.getValue("sTrIcThostKEYcheckING"));
	assertNull(c.getValue("sTrIcThostKEYcheckIN"));
	}

	@Test
	public void testAlias_DoesNotMatch() throws Exception {
	config("Host orcz\n" + "Port 29418\n" + "\tHostName repo.or.cz\n");
	final Host h = osc.lookup("repo.or.cz");
	assertNotNull(h);
	assertEquals("repo.or.cz", h.getHostName());
	assertEquals("jex_junit", h.getUser());
	assertEquals(22, h.getPort());
	assertNull(h.getIdentityFile());
	final Host h2 = osc.lookup("orcz");
	assertEquals("repo.or.cz", h.getHostName());
	assertEquals("jex_junit", h.getUser());
	assertEquals(29418, h2.getPort());
	assertNull(h.getIdentityFile());
	}

	@Test
	public void testAlias_OptionsSet() throws Exception {
	config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\tPort 2222\n"
	+ "\tUser jex\n" + "\tIdentityFile .ssh/id_jex\n"
	+ "\tForwardX11 no\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("repo.or.cz", h.getHostName());
	assertEquals("jex", h.getUser());
	assertEquals(2222, h.getPort());
	assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
	}

	@Test
	public void testAlias_OptionsKeywordCaseInsensitive() throws Exception {
	config("hOsT orcz\n" + "\thOsTnAmE repo.or.cz\n" + "\tPORT 2222\n"
	+ "\tuser jex\n" + "\tidentityfile .ssh/id_jex\n"
	+ "\tForwardX11 no\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("repo.or.cz", h.getHostName());
	assertEquals("jex", h.getUser());
	assertEquals(2222, h.getPort());
	assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
	}

	@Test
	public void testAlias_OptionsInherit() throws Exception {
	config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
	+ "\tHostName not.a.host.example.com\n" + "\tPort 2222\n"
	+ "\tUser jex\n" + "\tIdentityFile .ssh/id_jex\n"
	+ "\tForwardX11 no\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("repo.or.cz", h.getHostName());
	assertEquals("jex", h.getUser());
	assertEquals(2222, h.getPort());
	assertEquals(new File(home, ".ssh/id_jex"), h.getIdentityFile());
	}

	@Test
	public void testAlias_PreferredAuthenticationsDefault() throws Exception {
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertNull(h.getPreferredAuthentications());
	}

	@Test
	public void testAlias_PreferredAuthentications() throws Exception {
	config("Host orcz\n" + "\tPreferredAuthentications publickey\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("publickey", h.getPreferredAuthentications());
	}

	@Test
	public void testAlias_InheritPreferredAuthentications() throws Exception {
	config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
	+ "\tPreferredAuthentications publickey, hostbased\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("publickey,hostbased", h.getPreferredAuthentications());
	}

	@Test
	public void testAlias_BatchModeDefault() throws Exception {
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertFalse(h.isBatchMode());
	}

	@Test
	public void testAlias_BatchModeYes() throws Exception {
	config("Host orcz\n" + "\tBatchMode yes\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertTrue(h.isBatchMode());
	}

	@Test
	public void testAlias_InheritBatchMode() throws Exception {
	config("Host orcz\n" + "\tHostName repo.or.cz\n" + "\n" + "Host *\n"
	+ "\tBatchMode yes\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertTrue(h.isBatchMode());
	}

	@Test
	public void testAlias_ConnectionAttemptsDefault() throws Exception {
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(1, h.getConnectionAttempts());
	}

	@Test
	public void testAlias_ConnectionAttempts() throws Exception {
	config("Host orcz\n" + "\tConnectionAttempts 5\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(5, h.getConnectionAttempts());
	}

	@Test
	public void testAlias_invalidConnectionAttempts() throws Exception {
	config("Host orcz\n" + "\tConnectionAttempts -1\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(1, h.getConnectionAttempts());
	}

	@Test
	public void testAlias_badConnectionAttempts() throws Exception {
	config("Host orcz\n" + "\tConnectionAttempts xxx\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(1, h.getConnectionAttempts());
	}

	@Test
	public void testDefaultBlock() throws Exception {
	config("ConnectionAttempts 5\n\nHost orcz\nConnectionAttempts 3\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(5, h.getConnectionAttempts());
	}

	@Test
	public void testHostCaseInsensitive() throws Exception {
	config("hOsT orcz\nConnectionAttempts 3\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(3, h.getConnectionAttempts());
	}

	@Test
	public void testListValueSingle() throws Exception {
	config("Host orcz\nUserKnownHostsFile /foo/bar\n");
	final ConfigRepository.Config c = osc.getConfig("orcz");
	assertNotNull(c);
	assertEquals("/foo/bar", c.getValue("UserKnownHostsFile"));
	}

	@Test
	public void testListValueMultiple() throws Exception {
	// Tilde expansion occurs within the parser
	config("Host orcz\nUserKnownHostsFile \"~/foo/ba z\" /foo/bar \n");
	final ConfigRepository.Config c = osc.getConfig("orcz");
	assertNotNull(c);
	assertArrayEquals(new Object[] { new File(home, "foo/ba z").getPath(),
	"/foo/bar" },
	c.getValues("UserKnownHostsFile"));
	}

	@Test
	public void testRepeatedLookupsWithModification() throws Exception {
	config("Host orcz\n" + "\tConnectionAttempts -1\n");
	final Host h1 = osc.lookup("orcz");
	assertNotNull(h1);
	assertEquals(1, h1.getConnectionAttempts());
	config("Host orcz\n" + "\tConnectionAttempts 5\n");
	final Host h2 = osc.lookup("orcz");
	assertNotNull(h2);
	assertNotSame(h1, h2);
	assertEquals(5, h2.getConnectionAttempts());
	assertEquals(1, h1.getConnectionAttempts());
	assertNotSame(h1.getConfig(), h2.getConfig());
	}

	@Test
	public void testIdentityFile() throws Exception {
	config("Host orcz\nIdentityFile \"~/foo/ba z\"\nIdentityFile /foo/bar");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	File f = h.getIdentityFile();
	assertNotNull(f);
	// Host does tilde replacement
	assertEquals(new File(home, "foo/ba z"), f);
	final ConfigRepository.Config c = h.getConfig();
	// Config does tilde replacement, too
	assertArrayEquals(new Object[] { new File(home, "foo/ba z").getPath(),
	"/foo/bar" },
	c.getValues("IdentityFile"));
	}

	@Test
	public void testMultiIdentityFile() throws Exception {
	config("IdentityFile \"~/foo/ba z\"\nHost orcz\nIdentityFile /foo/bar\nHOST *\nIdentityFile /foo/baz");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	File f = h.getIdentityFile();
	assertNotNull(f);
	// Host does tilde replacement
	assertEquals(new File(home, "foo/ba z"), f);
	final ConfigRepository.Config c = h.getConfig();
	// Config does tilde replacement, too
	assertArrayEquals(new Object[] { new File(home, "foo/ba z").getPath(),
	"/foo/bar", "/foo/baz" },
	c.getValues("IdentityFile"));
	}

	@Test
	public void testNegatedPattern() throws Exception {
	config("Host repo.or.cz\nIdentityFile ~/foo/bar\nHOST !*.or.cz\nIdentityFile /foo/baz");
	final Host h = osc.lookup("repo.or.cz");
	assertNotNull(h);
	assertEquals(new File(home, "foo/bar"), h.getIdentityFile());
	assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath() },
	h.getConfig().getValues("IdentityFile"));
	}

	@Test
	public void testPattern() throws Exception {
	config("Host repo.or.cz\nIdentityFile ~/foo/bar\nHOST *.or.cz\nIdentityFile /foo/baz");
	final Host h = osc.lookup("repo.or.cz");
	assertNotNull(h);
	assertEquals(new File(home, "foo/bar"), h.getIdentityFile());
	assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath(),
	"/foo/baz" },
	h.getConfig().getValues("IdentityFile"));
	}

	@Test
	public void testMultiHost() throws Exception {
	config("Host orcz .or.cz\nIdentityFile ~/foo/bar\nHOST .or.cz\nIdentityFile /foo/baz");
	final Host h1 = osc.lookup("repo.or.cz");
	assertNotNull(h1);
	assertEquals(new File(home, "foo/bar"), h1.getIdentityFile());
	assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath(),
	"/foo/baz" },
	h1.getConfig().getValues("IdentityFile"));
	final Host h2 = osc.lookup("orcz");
	assertNotNull(h2);
	assertEquals(new File(home, "foo/bar"), h2.getIdentityFile());
	assertArrayEquals(new Object[] { new File(home, "foo/bar").getPath() },
	h2.getConfig().getValues("IdentityFile"));
	}

	@Test
	public void testEqualsSign() throws Exception {
	config("Host=orcz\n\tConnectionAttempts = 5\n\tUser=\t foobar\t\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(5, h.getConnectionAttempts());
	assertEquals("foobar", h.getUser());
	}

	@Test
	public void testMissingArgument() throws Exception {
	config("Host=orcz\n\tSendEnv\nIdentityFile\t\nForwardX11\n\tUser=\t foobar\t\n");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("foobar", h.getUser());
	assertArrayEquals(new String[0], h.getConfig().getValues("SendEnv"));
	assertNull(h.getIdentityFile());
	assertNull(h.getConfig().getValue("ForwardX11"));
	}

	@Test
	public void testHomeDirUserReplacement() throws Exception {
	config("Host=orcz\n\tIdentityFile %d/.ssh/%u_id_dsa");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(new File(new File(home, ".ssh"), "jex_junit_id_dsa"),
	h.getIdentityFile());
	}

	@Test
	public void testHostnameReplacement() throws Exception {
	config("Host=orcz\nHost .\n\tHostname %h\nHost *\n\tHostname %h.example.org");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals("orcz.example.org", h.getHostName());
	}

	@Test
	public void testRemoteUserReplacement() throws Exception {
	config("Host=orcz\n\tUser foo\n" + "Host .\n\tHostname %h\n"
	+ "Host *\n\tHostname %h.ex%%20ample.org\n\tIdentityFile ~/.ssh/%h_%r_id_dsa");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(
	new File(new File(home, ".ssh"),
	"orcz.ex%20ample.org_foo_id_dsa"),
	h.getIdentityFile());
	}

	@Test
	public void testLocalhostFQDNReplacement() throws Exception {
	String localhost = SystemReader.getInstance().getHostname();
	config("Host=orcz\n\tIdentityFile ~/.ssh/%l_id_dsa");
	final Host h = osc.lookup("orcz");
	assertNotNull(h);
	assertEquals(
	new File(new File(home, ".ssh"), localhost + "_id_dsa"),
	h.getIdentityFile());
	}

	@Test
	public void testPubKeyAcceptedAlgorithms() throws Exception {
	config("Host=orcz\n\tPubkeyAcceptedAlgorithms ^ssh-rsa");
	Host h = osc.lookup("orcz");
	Config c = h.getConfig();
	assertEquals("^ssh-rsa",
	c.getValue(SshConstants.PUBKEY_ACCEPTED_ALGORITHMS));
	assertEquals("^ssh-rsa", c.getValue("PubkeyAcceptedKeyTypes"));
	}

	@Test
	public void testPubKeyAcceptedKeyTypes() throws Exception {
	config("Host=orcz\n\tPubkeyAcceptedKeyTypes ^ssh-rsa");
	Host h = osc.lookup("orcz");
	Config c = h.getConfig();
	assertEquals("^ssh-rsa",
	c.getValue(SshConstants.PUBKEY_ACCEPTED_ALGORITHMS));
	assertEquals("^ssh-rsa", c.getValue("PubkeyAcceptedKeyTypes"));
	}

	@Test
	public void testEolComments() throws Exception {
	config("#Comment\nHost=orcz #Comment\n\tPubkeyAcceptedAlgorithms ^ssh-rsa # Comment\n#Comment");
	Host h = osc.lookup("orcz");
	assertNotNull(h);
	Config c = h.getConfig();
	assertEquals("^ssh-rsa",
	c.getValue(SshConstants.PUBKEY_ACCEPTED_ALGORITHMS));
	}

	@Test
	public void testEnVarSubstitution() throws Exception {
	config("Host orcz\nIdentityFile /tmp/${TST_VAR}\n"
	+ "CertificateFile /tmp/${}/foo\nUser ${TST_VAR}\nIdentityAgent /tmp/${TST_VAR/bar");
	Host h = osc.lookup("orcz");
	assertNotNull(h);
	Config c = h.getConfig();
	assertEquals("/tmp/TEST",
	c.getValue(SshConstants.IDENTITY_FILE));
	// No variable name
	assertEquals("/tmp/${}/foo", c.getValue(SshConstants.CERTIFICATE_FILE));
	// User doesn't get env var substitution:
	assertEquals("${TST_VAR}", c.getValue(SshConstants.USER));
	assertEquals("${TST_VAR}", h.getUser());
	// Unterminated:
	assertEquals("/tmp/${TST_VAR/bar",
	c.getValue(SshConstants.IDENTITY_AGENT));
	}
	}