2 * Copyright (c) 2019 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.nettyutil.handler.ssh.client;
10 import static com.google.common.base.Verify.verify;
12 import com.google.common.collect.ImmutableList;
13 import java.util.List;
14 import java.util.stream.Stream;
15 import org.opendaylight.netconf.shaded.sshd.client.ClientBuilder;
16 import org.opendaylight.netconf.shaded.sshd.client.SshClient;
17 import org.opendaylight.netconf.shaded.sshd.common.NamedFactory;
18 import org.opendaylight.netconf.shaded.sshd.common.kex.BuiltinDHFactories;
19 import org.opendaylight.netconf.shaded.sshd.common.kex.KeyExchangeFactory;
20 import org.opendaylight.netconf.shaded.sshd.common.signature.BuiltinSignatures;
21 import org.opendaylight.netconf.shaded.sshd.common.signature.Signature;
24 * A {@link ClientBuilder} which builds {@link NetconfSshClient} instances.
26 @Deprecated(since = "7.0.0", forRemoval = true)
27 public class NetconfClientBuilder extends ClientBuilder {
28 // RFC8332 rsa-sha2-256/rsa-sha2-512 are not a part of Mina's default set of signatures for clients as of 2.5.1.
29 // Add them to ensure interop with modern highly-secured devices.
30 private static final ImmutableList<NamedFactory<Signature>> FULL_SIGNATURE_PREFERENCE =
31 Stream.concat(DEFAULT_SIGNATURE_PREFERENCE.stream(), Stream.of(
32 BuiltinSignatures.rsaSHA512, BuiltinSignatures.rsaSHA256))
33 .filter(BuiltinSignatures::isSupported)
35 .collect(ImmutableList.toImmutableList());
37 // The SHA1 algorithm is disabled by default in Mina SSHD since 2.6.0.
38 // More details available here: https://issues.apache.org/jira/browse/SSHD-1004
39 // This block adds diffie-hellman-group14-sha1 back to the list of supported algorithms.
40 private static final ImmutableList<BuiltinDHFactories> FULL_DH_FACTORIES_LIST =
41 Stream.concat(DEFAULT_KEX_PREFERENCE.stream(), Stream.of(BuiltinDHFactories.dhg14))
42 .collect(ImmutableList.toImmutableList());
43 private static final List<KeyExchangeFactory> FULL_KEX_PREFERENCE =
44 NamedFactory.setUpTransformedFactories(true, FULL_DH_FACTORIES_LIST, DH2KEX);
47 public NetconfSshClient build() {
48 final SshClient client = super.build();
49 verify(client instanceof NetconfSshClient, "Unexpected client %s", client);
50 return (NetconfSshClient) client;
54 protected ClientBuilder fillWithDefaultValues() {
55 if (factory == null) {
56 factory = NetconfSshClient::new;
58 if (signatureFactories == null) {
59 signatureFactories = FULL_SIGNATURE_PREFERENCE;
61 if (keyExchangeFactories == null) {
62 keyExchangeFactories = FULL_KEX_PREFERENCE;
64 return super.fillWithDefaultValues();