protected Session createSession(final RemoteFileConfiguration configuration)
throws JSchException {
final JSch jsch = new JSch();
JSch.setLogger(new JSchLogger());
SftpConfiguration sftpConfig = (SftpConfiguration) configuration;
if (isNotEmpty(sftpConfig.getCiphers())) {
LOG.debug("Using ciphers: {}", sftpConfig.getCiphers());
Hashtable<String, String> ciphers = new Hashtable<String, String>();
ciphers.put("cipher.s2c", sftpConfig.getCiphers());
ciphers.put("cipher.c2s", sftpConfig.getCiphers());
JSch.setConfig(ciphers);
}
if (isNotEmpty(sftpConfig.getPrivateKeyFile())) {
LOG.debug("Using private keyfile: {}", sftpConfig.getPrivateKeyFile());
if (isNotEmpty(sftpConfig.getPrivateKeyPassphrase())) {
jsch.addIdentity(sftpConfig.getPrivateKeyFile(), sftpConfig.getPrivateKeyPassphrase());
} else {
jsch.addIdentity(sftpConfig.getPrivateKeyFile());
}
}
if (sftpConfig.getPrivateKey() != null) {
LOG.debug("Using private key information from byte array");
byte[] passphrase = null;
if (isNotEmpty(sftpConfig.getPrivateKeyPassphrase())) {
try {
passphrase = sftpConfig.getPrivateKeyPassphrase().getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
throw new JSchException("Cannot transform passphrase to byte[]", e);
}
}
jsch.addIdentity("ID", sftpConfig.getPrivateKey(), null, passphrase);
}
if (sftpConfig.getPrivateKeyUri() != null) {
LOG.debug("Using private key uri : {}", sftpConfig.getPrivateKeyUri());
byte[] passphrase = null;
if (isNotEmpty(sftpConfig.getPrivateKeyPassphrase())) {
try {
passphrase = sftpConfig.getPrivateKeyPassphrase().getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
throw new JSchException("Cannot transform passphrase to byte[]", e);
}
}
try {
InputStream is =
ResourceHelper.resolveMandatoryResourceAsInputStream(
endpoint.getCamelContext().getClassResolver(), sftpConfig.getPrivateKeyUri());
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOHelper.copyAndCloseInput(is, bos);
jsch.addIdentity("ID", bos.toByteArray(), null, passphrase);
} catch (IOException e) {
throw new JSchException("Cannot read resource: " + sftpConfig.getPrivateKeyUri(), e);
}
}
if (sftpConfig.getKeyPair() != null) {
LOG.debug("Using private key information from key pair");
KeyPair keyPair = sftpConfig.getKeyPair();
if (keyPair.getPrivate() != null && keyPair.getPublic() != null) {
if (keyPair.getPrivate() instanceof RSAPrivateKey
&& keyPair.getPublic() instanceof RSAPublicKey) {
jsch.addIdentity(new RSAKeyPairIdentity("ID", keyPair), null);
} else if (keyPair.getPrivate() instanceof DSAPrivateKey
&& keyPair.getPublic() instanceof DSAPublicKey) {
jsch.addIdentity(new DSAKeyPairIdentity("ID", keyPair), null);
} else {
LOG.warn("Only RSA and DSA key pairs are supported");
}
} else {
LOG.warn("PrivateKey and PublicKey in the KeyPair must be filled");
}
}
if (isNotEmpty(sftpConfig.getKnownHostsFile())) {
LOG.debug("Using knownhosts file: {}", sftpConfig.getKnownHostsFile());
jsch.setKnownHosts(sftpConfig.getKnownHostsFile());
}
if (isNotEmpty(sftpConfig.getKnownHostsUri())) {
LOG.debug("Using knownhosts uri: {}", sftpConfig.getKnownHostsUri());
try {
InputStream is =
ResourceHelper.resolveMandatoryResourceAsInputStream(
endpoint.getCamelContext().getClassResolver(), sftpConfig.getKnownHostsUri());
jsch.setKnownHosts(is);
} catch (IOException e) {
throw new JSchException("Cannot read resource: " + sftpConfig.getKnownHostsUri(), e);
}
}
if (sftpConfig.getKnownHosts() != null) {
LOG.debug("Using knownhosts information from byte array");
jsch.setKnownHosts(new ByteArrayInputStream(sftpConfig.getKnownHosts()));
}
final Session session =
jsch.getSession(
configuration.getUsername(), configuration.getHost(), configuration.getPort());
if (isNotEmpty(sftpConfig.getStrictHostKeyChecking())) {
LOG.debug("Using StrickHostKeyChecking: {}", sftpConfig.getStrictHostKeyChecking());
session.setConfig("StrictHostKeyChecking", sftpConfig.getStrictHostKeyChecking());
}
session.setServerAliveInterval(sftpConfig.getServerAliveInterval());
session.setServerAliveCountMax(sftpConfig.getServerAliveCountMax());
// compression
if (sftpConfig.getCompression() > 0) {
LOG.debug("Using compression: {}", sftpConfig.getCompression());
session.setConfig("compression.s2c", "[email protected],zlib,none");
session.setConfig("compression.c2s", "[email protected],zlib,none");
session.setConfig("compression_level", Integer.toString(sftpConfig.getCompression()));
}
// set the PreferredAuthentications
if (sftpConfig.getPreferredAuthentications() != null) {
LOG.debug("Using PreferredAuthentications: {}", sftpConfig.getPreferredAuthentications());
session.setConfig("PreferredAuthentications", sftpConfig.getPreferredAuthentications());
}
// set user information
session.setUserInfo(
new ExtendedUserInfo() {
public String getPassphrase() {
return null;
}
public String getPassword() {
return configuration.getPassword();
}
public boolean promptPassword(String s) {
return true;
}
public boolean promptPassphrase(String s) {
return true;
}
public boolean promptYesNo(String s) {
LOG.warn("Server asks for confirmation (yes|no): " + s + ". Camel will answer no.");
// Return 'false' indicating modification of the hosts file is disabled.
return false;
}
public void showMessage(String s) {
LOG.trace("Message received from Server: " + s);
}
public String[] promptKeyboardInteractive(
String destination,
String name,
String instruction,
String[] prompt,
boolean[] echo) {
// must return an empty array if password is null
if (configuration.getPassword() == null) {
return new String[0];
} else {
return new String[] {configuration.getPassword()};
}
}
});
// set the SO_TIMEOUT for the time after the connect phase
if (configuration.getSoTimeout() > 0) {
session.setTimeout(configuration.getSoTimeout());
}
// set proxy if configured
if (proxy != null) {
session.setProxy(proxy);
}
return session;
}
