private Proxy[] getProxies() {
	String proxyString = authority.getProxyString();
	if (!StringUtils.isEmpty(proxyString)) {
		java.net.Proxy proxy = FileUtils.getProxy(authority.getProxyString());
		if ((proxy != null) && (proxy.type() != Type.DIRECT)) {
			URI proxyUri = URI.create(proxyString);
			String hostName = proxyUri.getHost();
			int port = proxyUri.getPort();
			String userInfo = proxyUri.getUserInfo();
			org.jetel.util.protocols.UserInfo proxyCredentials = null;
			if (userInfo != null) {
				proxyCredentials = new org.jetel.util.protocols.UserInfo(userInfo);
			}
			switch (proxy.type()) {
			case HTTP:
				ProxyHTTP proxyHttp = (port >= 0) ? new ProxyHTTP(hostName, port) : new ProxyHTTP(hostName);
				if (proxyCredentials != null) {
					proxyHttp.setUserPasswd(proxyCredentials.getUser(), proxyCredentials.getPassword());
				}
				return new Proxy[] {proxyHttp};
			case SOCKS:
				ProxySOCKS4 proxySocks4 = (port >= 0) ? new ProxySOCKS4(hostName, port) : new ProxySOCKS4(hostName);
				ProxySOCKS5 proxySocks5 = (port >= 0) ? new ProxySOCKS5(hostName, port) : new ProxySOCKS5(hostName);
				if (proxyCredentials != null) {
					proxySocks4.setUserPasswd(proxyCredentials.getUser(), proxyCredentials.getPassword());
					proxySocks5.setUserPasswd(proxyCredentials.getUser(), proxyCredentials.getPassword());
				}
				return new Proxy[] {proxySocks5, proxySocks4};
			case DIRECT:
				return new Proxy[1];
			}
		}
	}
	
	return new Proxy[1];
}
 

private com.jcraft.jsch.Proxy createProxy (String proxyHost, int proxyPort) {
    return USE_PROXY_TUNNELING
            ? new ProxyHTTP(proxyHost, proxyPort)
            : new ProxySOCKS5(proxyHost, proxyPort);
}
 

/**
 * Connects the connection.
 * @throws IOException if the unfortunate happens.
 */
@Override
public synchronized void connect() throws IOException {
    logger.debug("connecting...");
    Authentication auth = authentication;
    if (updater != null) {
        Authentication updatedAuth = updater.updateAuthentication(authentication);
        if (updatedAuth != null && auth != updatedAuth) {
            auth = updatedAuth;
        }
    }
    try {
        client = new JSch();
        if (auth.getPrivateKeyPhrase() == null) {
            client.addIdentity(auth.getPrivateKeyFile().getAbsolutePath(),
                    auth.getPrivateKeyFilePassword());
        } else {
            client.addIdentity(auth.getUsername(), auth.getPrivateKeyPhrase(), null,
                    auth.getPrivateKeyFilePassword().getBytes("UTF-8"));
        }
        client.setHostKeyRepository(new BlindHostKeyRepository());
        connectSession = client.getSession(auth.getUsername(), host, port);
        connectSession.setConfig("PreferredAuthentications", "publickey");
        if (proxy != null && !proxy.isEmpty()) {
            String[] splitted = proxy.split(":");
            if (splitted.length > 2 && splitted[1].length() >= PROTO_HOST_DELIM_LENGTH) {
                String pproto = splitted[0];
                String phost = splitted[1].substring(2);
                int pport = Integer.parseInt(splitted[2]);
                if (pproto.equals("socks5") || pproto.equals("http")) {
                    if (pproto.equals("socks5")) {
                         connectSession.setProxy(new ProxySOCKS5(phost, pport));
                    } else {
                         connectSession.setProxy(new ProxyHTTP(phost, pport));
                    }
                } else {
                    throw new MalformedURLException("Only http and socks5 protocols are supported");
                }
            } else {
                throw new MalformedURLException(proxy);
            }
        }
        connectSession.connect(this.connectionTimeout);
        logger.debug("Connected: {}", connectSession.isConnected());
        connectSession.setServerAliveInterval(ALIVE_INTERVAL);
    } catch (JSchException ex) {
        throw new SshException(ex);
    }
}
 

private static ProxySOCKS5 createProxySOCKS5(final String proxyHost, final int proxyPort) {
    return proxyPort == 0 ? new ProxySOCKS5(proxyHost) : new ProxySOCKS5(proxyHost, proxyPort);
}