net.sf.sshapi.impl.libssh.LibsshSshProvider Maven / Gradle / Ivy

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libssh is a C library that enables you to write a program that uses the SSH protocol. With it, you can remotely execute programs, transfer files, or use a secure and transparent tunnel for your remote programs. The SSH protocol is encrypted, ensures data integrity, and provides strong means of authenticating both the server of the client. The library hides a lot of technical details from the SSH protocol, but this does not mean that you should not try to know about and understand these details. This is the SSHAPI provider bridge for libssh, and uses JNA. Downloads and more information about libssh may be found at http://api.libssh.org/master/index.html. This library is deployed to SSHTools own Maven repository.

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/* 
 * Copyright (c) 2010 The JavaSSH Project
 * All rights reserved.
 * 
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 * 
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 * 
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package net.sf.sshapi.impl.libssh;

import java.util.Arrays;
import java.util.List;

import com.sun.jna.CallbackProxy;

import ssh.SshLibrary;

import net.sf.sshapi.AbstractProvider;
import net.sf.sshapi.Capability;
import net.sf.sshapi.SshClient;
import net.sf.sshapi.SshConfiguration;
import net.sf.sshapi.SshException;
import net.sf.sshapi.hostkeys.SshHostKeyManager;

public class LibsshSshProvider extends AbstractProvider {
	
	static class JavaThreading implements CallbackProxy {

		public Object callback(Object[] args) {
			// TODO Auto-generated method stub
			return null;
		}

		public Class[] getParameterTypes() {
			// TODO Auto-generated method stub
			return null;
		}

		public Class getReturnType() {
			// TODO Auto-generated method stub
			return null;
		}
		
	}

	static {
		SshLibrary.INSTANCE.ssh_init();
	}

	public LibsshSshProvider() {
		super("libssh");
	}

	protected SshClient doCreateClient(SshConfiguration configuration) {
		SshClient client = new LibsshClient(configuration);
		client.init(this);
		return client;
	}

	public void doSupportsConfiguration(SshConfiguration configuration) {
		try {
			SshLibrary.INSTANCE.hashCode();
		} catch (Exception e) {
			throw new UnsupportedOperationException("libssh is not installed");
		}
	}

	public List getCapabilities() {
		return Arrays.asList(new Capability[] { Capability.PASSWORD_AUTHENTICATION, Capability.PER_CONNECTION_CONFIGURATION,
			Capability.SSH2, Capability.SSH1, Capability.SCP, Capability.SFTP, Capability.FILE_TRANSFER_EVENTS });
	}

	public List getSupportedCiphers(int protocolVersion) {
		return Arrays.asList(new String[] { "aes128-cbc", "aes192-cbc", "aes256-cbc", "blowfish-cbc", "3des", "aes128-ctr" });
	}

	public SshHostKeyManager createHostKeyManager(SshConfiguration configuration) throws SshException {
		throw new UnsupportedOperationException();
	}

	public List getSupportedCompression() {
		return Arrays.asList(new String[] { "zlib", "[email protected]" });
	}

	public List getSupportedMAC() {
		return Arrays.asList(new String[] { "hmac-md5", "hmac-sha1", "hmac-sha1-96", "hmac-md5-96" });
	}

	public List getSupportedKeyExchange() {
		return Arrays.asList(new String[] { "diffie-hellman-group1-sha1" });
	}

	public List getSupportedPublicKey() {
		return Arrays.asList(new String[] { SshConfiguration.PUBLIC_KEY_SSHRSA, SshConfiguration.PUBLIC_KEY_SSHDSA });
	}

	public void seed(long seed) {
		// TODO seed libssh?
	}
}