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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.opendaylight.netconf.shaded.sshd.common;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.opendaylight.netconf.shaded.sshd.common.channel.ChannelFactory;
import org.opendaylight.netconf.shaded.sshd.common.channel.RequestHandler;
import org.opendaylight.netconf.shaded.sshd.common.channel.throttle.ChannelStreamWriterResolver;
import org.opendaylight.netconf.shaded.sshd.common.cipher.BuiltinCiphers;
import org.opendaylight.netconf.shaded.sshd.common.cipher.Cipher;
import org.opendaylight.netconf.shaded.sshd.common.compression.Compression;
import org.opendaylight.netconf.shaded.sshd.common.file.FileSystemFactory;
import org.opendaylight.netconf.shaded.sshd.common.file.nativefs.NativeFileSystemFactory;
import org.opendaylight.netconf.shaded.sshd.common.forward.DefaultForwarderFactory;
import org.opendaylight.netconf.shaded.sshd.common.forward.ForwarderFactory;
import org.opendaylight.netconf.shaded.sshd.common.helpers.AbstractFactoryManager;
import org.opendaylight.netconf.shaded.sshd.common.kex.BuiltinDHFactories;
import org.opendaylight.netconf.shaded.sshd.common.kex.KeyExchangeFactory;
import org.opendaylight.netconf.shaded.sshd.common.kex.extension.KexExtensionHandler;
import org.opendaylight.netconf.shaded.sshd.common.mac.BuiltinMacs;
import org.opendaylight.netconf.shaded.sshd.common.mac.Mac;
import org.opendaylight.netconf.shaded.sshd.common.random.Random;
import org.opendaylight.netconf.shaded.sshd.common.random.SingletonRandomFactory;
import org.opendaylight.netconf.shaded.sshd.common.session.ConnectionService;
import org.opendaylight.netconf.shaded.sshd.common.session.UnknownChannelReferenceHandler;
import org.opendaylight.netconf.shaded.sshd.common.session.helpers.DefaultUnknownChannelReferenceHandler;
import org.opendaylight.netconf.shaded.sshd.common.signature.BuiltinSignatures;
import org.opendaylight.netconf.shaded.sshd.common.signature.Signature;
import org.opendaylight.netconf.shaded.sshd.common.util.ObjectBuilder;
import org.opendaylight.netconf.shaded.sshd.common.util.security.SecurityUtils;
import org.opendaylight.netconf.shaded.sshd.server.forward.ForwardingFilter;
import org.opendaylight.netconf.shaded.sshd.server.forward.RejectAllForwardingFilter;
/**
* Base class for dedicated client/server instance builders
*
* @param Type of {@link AbstractFactoryManager} being built
* @param Type of builder
* @author Apache MINA SSHD Project
*/
public class BaseBuilder> implements ObjectBuilder {
public static final FileSystemFactory DEFAULT_FILE_SYSTEM_FACTORY = NativeFileSystemFactory.INSTANCE;
public static final ForwardingFilter DEFAULT_FORWARDING_FILTER = RejectAllForwardingFilter.INSTANCE;
public static final ForwarderFactory DEFAULT_FORWARDER_FACTORY = DefaultForwarderFactory.INSTANCE;
/**
* The default {@link BuiltinCiphers} setup in order of preference as specified by
* ssh_config(5)
*/
public static final List DEFAULT_CIPHERS_PREFERENCE = Collections.unmodifiableList(
Arrays.asList(
BuiltinCiphers.cc20p1305_openssh,
BuiltinCiphers.aes128ctr,
BuiltinCiphers.aes192ctr,
BuiltinCiphers.aes256ctr,
BuiltinCiphers.aes128gcm,
BuiltinCiphers.aes256gcm,
BuiltinCiphers.aes128cbc,
BuiltinCiphers.aes192cbc,
BuiltinCiphers.aes256cbc));
/**
* The default {@link BuiltinDHFactories} setup in order of preference as specified by
* ssh_config(5)
*/
public static final List DEFAULT_KEX_PREFERENCE = Collections.unmodifiableList(
Arrays.asList(
BuiltinDHFactories.sntrup761x25519,
BuiltinDHFactories.curve25519,
BuiltinDHFactories.curve25519_libssh,
BuiltinDHFactories.curve448,
BuiltinDHFactories.ecdhp521,
BuiltinDHFactories.ecdhp384,
BuiltinDHFactories.ecdhp256,
BuiltinDHFactories.dhgex256,
BuiltinDHFactories.dhg18_512,
BuiltinDHFactories.dhg17_512,
BuiltinDHFactories.dhg16_512,
BuiltinDHFactories.dhg15_512,
BuiltinDHFactories.dhg14_256));
/**
* The default {@link BuiltinMacs} setup in order of preference as specified by
* ssh_config(5)
*/
public static final List DEFAULT_MAC_PREFERENCE = Collections.unmodifiableList(
Arrays.asList(
BuiltinMacs.hmacsha256etm,
BuiltinMacs.hmacsha512etm,
BuiltinMacs.hmacsha1etm,
BuiltinMacs.hmacsha256,
BuiltinMacs.hmacsha512,
BuiltinMacs.hmacsha1));
/**
* Preferred {@link BuiltinSignatures} according to
* sshd_config(5) - HostKeyAlgorithms
* {@code HostKeyAlgorithms} recommendation
*/
public static final List DEFAULT_SIGNATURE_PREFERENCE = Collections.unmodifiableList(
Arrays.asList(
BuiltinSignatures.nistp256_cert,
BuiltinSignatures.nistp384_cert,
BuiltinSignatures.nistp521_cert,
BuiltinSignatures.ed25519_cert,
BuiltinSignatures.rsaSHA512_cert,
BuiltinSignatures.rsaSHA256_cert,
BuiltinSignatures.nistp256,
BuiltinSignatures.nistp384,
BuiltinSignatures.nistp521,
BuiltinSignatures.ed25519,
BuiltinSignatures.sk_ecdsa_sha2_nistp256,
BuiltinSignatures.sk_ssh_ed25519,
BuiltinSignatures.rsaSHA512,
BuiltinSignatures.rsaSHA256,
BuiltinSignatures.rsa));
public static final UnknownChannelReferenceHandler DEFAULT_UNKNOWN_CHANNEL_REFERENCE_HANDLER
= DefaultUnknownChannelReferenceHandler.INSTANCE;
protected Factory factory;
protected List keyExchangeFactories;
protected List> cipherFactories;
protected List> compressionFactories;
protected List> macFactories;
protected List> signatureFactories;
protected Factory randomFactory;
protected List channelFactories;
protected FileSystemFactory fileSystemFactory;
protected ForwarderFactory forwarderFactory;
protected List> globalRequestHandlers;
protected ForwardingFilter forwardingFilter;
protected ChannelStreamWriterResolver channelStreamPacketWriterResolver;
protected UnknownChannelReferenceHandler unknownChannelReferenceHandler;
protected KexExtensionHandler kexExtensionHandler;
public BaseBuilder() {
super();
}
protected S fillWithDefaultValues() {
if (randomFactory == null) {
randomFactory = new SingletonRandomFactory(SecurityUtils.getRandomFactory());
}
if (cipherFactories == null) {
cipherFactories = setUpDefaultCiphers(false);
}
if (macFactories == null) {
macFactories = setUpDefaultMacs(false);
}
if (fileSystemFactory == null) {
fileSystemFactory = DEFAULT_FILE_SYSTEM_FACTORY;
}
if (forwardingFilter == null) {
forwardingFilter = DEFAULT_FORWARDING_FILTER;
}
if (forwarderFactory == null) {
forwarderFactory = DEFAULT_FORWARDER_FACTORY;
}
if (unknownChannelReferenceHandler == null) {
unknownChannelReferenceHandler = DEFAULT_UNKNOWN_CHANNEL_REFERENCE_HANDLER;
}
return me();
}
public S keyExchangeFactories(List keyExchangeFactories) {
this.keyExchangeFactories = keyExchangeFactories;
return me();
}
public S kexExtensionHandler(KexExtensionHandler kexExtensionHandler) {
this.kexExtensionHandler = kexExtensionHandler;
return me();
}
public S signatureFactories(List> signatureFactories) {
this.signatureFactories = signatureFactories;
return me();
}
public S randomFactory(Factory randomFactory) {
this.randomFactory = randomFactory;
return me();
}
public S cipherFactories(List> cipherFactories) {
this.cipherFactories = cipherFactories;
return me();
}
public S compressionFactories(List> compressionFactories) {
this.compressionFactories = compressionFactories;
return me();
}
public S macFactories(List> macFactories) {
this.macFactories = macFactories;
return me();
}
public S channelFactories(List channelFactories) {
this.channelFactories = channelFactories;
return me();
}
public S fileSystemFactory(FileSystemFactory fileSystemFactory) {
this.fileSystemFactory = fileSystemFactory;
return me();
}
public S forwardingFilter(ForwardingFilter filter) {
this.forwardingFilter = filter;
return me();
}
public S forwarderFactory(ForwarderFactory forwarderFactory) {
this.forwarderFactory = forwarderFactory;
return me();
}
public S globalRequestHandlers(List> globalRequestHandlers) {
this.globalRequestHandlers = globalRequestHandlers;
return me();
}
public S factory(Factory factory) {
this.factory = factory;
return me();
}
public S channelStreamPacketWriterResolver(ChannelStreamWriterResolver resolver) {
channelStreamPacketWriterResolver = resolver;
return me();
}
public S unknownChannelReferenceHandler(UnknownChannelReferenceHandler handler) {
unknownChannelReferenceHandler = handler;
return me();
}
public T build(boolean isFillWithDefaultValues) {
if (isFillWithDefaultValues) {
fillWithDefaultValues();
}
T ssh = factory.create();
ssh.setKexExtensionHandler(kexExtensionHandler);
ssh.setKeyExchangeFactories(keyExchangeFactories);
ssh.setSignatureFactories(signatureFactories);
ssh.setRandomFactory(randomFactory);
ssh.setCipherFactories(cipherFactories);
ssh.setCompressionFactories(compressionFactories);
ssh.setMacFactories(macFactories);
ssh.setChannelFactories(channelFactories);
ssh.setFileSystemFactory(fileSystemFactory);
ssh.setForwardingFilter(forwardingFilter);
ssh.setForwarderFactory(forwarderFactory);
ssh.setGlobalRequestHandlers(globalRequestHandlers);
ssh.setChannelStreamWriterResolver(channelStreamPacketWriterResolver);
ssh.setUnknownChannelReferenceHandler(unknownChannelReferenceHandler);
return ssh;
}
@Override
public T build() {
return build(true);
}
@SuppressWarnings("unchecked")
protected S me() {
return (S) this;
}
/**
* @param ignoreUnsupported If {@code true} then all the default ciphers are included, regardless of whether they
* are currently supported by the JCE. Otherwise, only the supported ones out of the list
* are included
* @return A {@link List} of the default {@link NamedFactory} instances of the {@link Cipher}s
* according to the preference order defined by {@link #DEFAULT_CIPHERS_PREFERENCE}.
* Note: the list may be filtered to exclude unsupported JCE ciphers according to
* the ignoreUnsupported parameter
* @see BuiltinCiphers#isSupported()
*/
@SuppressWarnings({ "unchecked", "rawtypes" }) // safe due to the hierarchy
public static List> setUpDefaultCiphers(boolean ignoreUnsupported) {
return (List) NamedFactory.setUpBuiltinFactories(ignoreUnsupported, DEFAULT_CIPHERS_PREFERENCE);
}
/**
* @param ignoreUnsupported If {@code true} all the available built-in {@link Mac} factories are added, otherwise
* only those that are supported by the current JDK setup
* @return A {@link List} of the default {@link NamedFactory} instances of the {@link Mac}s
* according to the preference order defined by {@link #DEFAULT_MAC_PREFERENCE}.
* Note: the list may be filtered to exclude unsupported JCE MACs according to the
* ignoreUnsupported parameter
* @see BuiltinMacs#isSupported()
*/
@SuppressWarnings({ "unchecked", "rawtypes" }) // safe due to the hierarchy
public static List> setUpDefaultMacs(boolean ignoreUnsupported) {
return (List) NamedFactory.setUpBuiltinFactories(ignoreUnsupported, DEFAULT_MAC_PREFERENCE);
}
}
