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## org.apache.commons.net.ftp
Class FTPSClient

    java.lang.Object
      org.apache.commons.net.SocketClient
          org.apache.commons.net.ftp.FTP
              org.apache.commons.net.ftp.FTPClient
                  org.apache.commons.net.ftp.FTPSClient

All Implemented Interfaces:
  Configurable

    public class FTPSClient

extends FTPClient

FTP over SSL processing. If desired, the JVM property -Djavax.net.debug=all can be used to see wire-level SSL details.

Since:
  2.0
Version:
  $Id: FTPSClient.java 1407341 2012-11-09 01:31:00Z ggregory $

Field Summary
`static int` | `DEFAULT_FTPS_DATA_PORT`
`static int` | `DEFAULT_FTPS_PORT`
`static String` | `KEYSTORE_ALGORITHM` Deprecated. - not used - may be removed in a future release
`static String` | `PROVIDER` Deprecated. - not used - may be removed in a future release
`static String` | `STORE_TYPE` Deprecated. - not used - may be removed in a future release
`static String` | `TRUSTSTORE_ALGORITHM` Deprecated. - not used - may be removed in a future release

Fields inherited from class org.apache.commons.net.ftp.FTPClient
`ACTIVE_LOCAL_DATA_CONNECTION_MODE, ACTIVE_REMOTE_DATA_CONNECTION_MODE, FTP_SYSTEM_TYPE, FTP_SYSTEM_TYPE_DEFAULT, PASSIVE_LOCAL_DATA_CONNECTION_MODE, PASSIVE_REMOTE_DATA_CONNECTION_MODE, SYSTEM_TYPE_PROPERTIES`

Fields inherited from class org.apache.commons.net.ftp.FTP
`_commandSupport_, _controlEncoding, _controlInput_, _controlOutput_, _newReplyString, _replyCode, _replyLines, _replyString, ASCII_FILE_TYPE, BINARY_FILE_TYPE, BLOCK_TRANSFER_MODE, CARRIAGE_CONTROL_TEXT_FORMAT, COMPRESSED_TRANSFER_MODE, DEFAULT_CONTROL_ENCODING, DEFAULT_DATA_PORT, DEFAULT_PORT, EBCDIC_FILE_TYPE, FILE_STRUCTURE, LOCAL_FILE_TYPE, NON_PRINT_TEXT_FORMAT, PAGE_STRUCTURE, RECORD_STRUCTURE, REPLY_CODE_LEN, STREAM_TRANSFER_MODE, strictMultilineParsing, TELNET_TEXT_FORMAT`

Fields inherited from class org.apache.commons.net.SocketClient
`_defaultPort_, _input_, _output_, _serverSocketFactory_, _socket_, _socketFactory_, _timeout_, connectTimeout, NETASCII_EOL`

Constructor Summary
`FTPSClient()` Constructor for FTPSClient, calls `FTPSClient(String, boolean)`.
`FTPSClient(boolean isImplicit)` Constructor for FTPSClient, using `DEFAULT_PROTOCOL` - i.e.
`FTPSClient(boolean isImplicit, SSLContext context)` Constructor for FTPSClient, using `DEFAULT_PROTOCOL` - i.e.
`FTPSClient(SSLContext context)` Constructor for FTPSClient, using `DEFAULT_PROTOCOL` - i.e.
`FTPSClient(String protocol)` Constructor for FTPSClient, using explict mode, calls `FTPSClient(String, boolean)`.
`FTPSClient(String protocol, boolean isImplicit)` Constructor for FTPSClient allowing specification of protocol and security mode.

Method Summary
`protected void` | `_connectAction_()` Because there are so many connect() methods, the _connectAction_() method is provided as a means of performing some action immediately after establishing a connection, rather than reimplementing all of the connect() methods.
`protected Socket` | `_openDataConnection_(int command, String arg)` Returns a socket of the data connection.
`protected Socket` | `_openDataConnection_(String command, String arg)` Returns a socket of the data connection.
`protected void` | `_prepareDataSocket_(Socket socket)` Performs any custom initialization for a newly created SSLSocket (before the SSL handshake happens).
`void` | `disconnect()` Closes the connection to the FTP server and restores connection parameters to the default values.
`int` | `execADAT(byte[] data)` Send the ADAT command with the specified authentication data.
`protected void` | `execAUTH()` AUTH command.
`int` | `execAUTH(String mechanism)` Send the AUTH command with the specified mechanism.
`int` | `execCCC()` Send the CCC command to the server.
`int` | `execCONF(byte[] data)` Send the CONF command with the specified data.
`int` | `execENC(byte[] data)` Send the ENC command with the specified data.
`int` | `execMIC(byte[] data)` Send the MIC command with the specified data.
`void` | `execPBSZ(long pbsz)` PBSZ command.
`void` | `execPROT(String prot)` PROT command.
`String` | `getAuthValue()` Return AUTH command use value.
`String[]` | `getEnabledCipherSuites()` Returns the names of the cipher suites which could be enabled for use on this connection.
`String[]` | `getEnabledProtocols()` Returns the names of the protocol versions which are currently enabled for use on this connection.
`boolean` | `getEnableSessionCreation()` Returns true if new SSL sessions may be established by this socket.
`boolean` | `getNeedClientAuth()` Returns true if the socket will require client authentication.
`TrustManager` | `getTrustManager()` Get the currently configured `TrustManager`.
`boolean` | `getUseClientMode()` Returns true if the socket is set to use client mode in its first handshake.
`boolean` | `getWantClientAuth()` Returns true if the socket will request client authentication.
`byte[]` | `parseADATReply(String reply)` Parses the given ADAT response line and base64-decodes the data.
`long` | `parsePBSZ(long pbsz)` PBSZ command.
`int` | `sendCommand(String command, String args)` Send an FTP command.
`void` | `setAuthValue(String auth)` Set AUTH command use value.
`void` | `setEnabledCipherSuites(String[] cipherSuites)` Controls which particular cipher suites are enabled for use on this connection.
`void` | `setEnabledProtocols(String[] protocolVersions)` Controls which particular protocol versions are enabled for use on this connection.
`void` | `setEnabledSessionCreation(boolean isCreation)` Controls whether a new SSL session may be established by this socket.
`void` | `setKeyManager(KeyManager keyManager)` Set a `KeyManager` to use
`void` | `setNeedClientAuth(boolean isNeedClientAuth)` Configures the socket to require client authentication.
`void` | `setTrustManager(TrustManager trustManager)` Override the default `TrustManager` to use; if set to `null`, the default TrustManager from the JVM will be used.
`void` | `setUseClientMode(boolean isClientMode)` Configures the socket to use client (or server) mode in its first handshake.
`void` | `setWantClientAuth(boolean isWantClientAuth)` Configures the socket to request client authentication, but only if such a request is appropriate to the cipher suite negotiated.
`protected void` | `sslNegotiation()` SSL/TLS negotiation.

Methods inherited from class org.apache.commons.net.ftp.FTPClient
`_parseExtendedPassiveModeReply, _parsePassiveModeReply, _retrieveFile, _retrieveFileStream, _storeFile, _storeFileStream, abort, allocate, allocate, appendFile, appendFileStream, changeToParentDirectory, changeWorkingDirectory, completePendingCommand, configure, deleteFile, doCommand, doCommandAsStrings, enterLocalActiveMode, enterLocalPassiveMode, enterRemoteActiveMode, enterRemotePassiveMode, features, featureValue, featureValues, getAutodetectUTF8, getBufferSize, getControlKeepAliveReplyTimeout, getControlKeepAliveTimeout, getCopyStreamListener, getDataConnectionMode, getListArguments, getListHiddenFiles, getModificationTime, getPassiveHost, getPassiveLocalIPAddress, getPassivePort, getRestartOffset, getStatus, getStatus, getSystemName, getSystemType, hasFeature, hasFeature, initiateListParsing, initiateListParsing, initiateListParsing, isRemoteVerificationEnabled, isUseEPSVwithIPv4, listDirectories, listDirectories, listFiles, listFiles, listFiles, listHelp, listHelp, listNames, listNames, login, login, logout, makeDirectory, mlistDir, mlistDir, mlistDir, mlistFile, printWorkingDirectory, remoteAppend, remoteRetrieve, remoteStore, remoteStoreUnique, remoteStoreUnique, removeDirectory, rename, restart, retrieveFile, retrieveFileStream, sendNoOp, sendSiteCommand, setActiveExternalIPAddress, setActivePortRange, setAutodetectUTF8, setBufferSize, setControlKeepAliveReplyTimeout, setControlKeepAliveTimeout, setCopyStreamListener, setDataTimeout, setFileStructure, setFileTransferMode, setFileType, setFileType, setListHiddenFiles, setModificationTime, setParserFactory, setPassiveLocalIPAddress, setPassiveLocalIPAddress, setRemoteVerificationEnabled, setReportActiveExternalIPAddress, setRestartOffset, setUseEPSVwithIPv4, storeFile, storeFileStream, storeUniqueFile, storeUniqueFile, storeUniqueFileStream, storeUniqueFileStream, structureMount`

Methods inherited from class org.apache.commons.net.ftp.FTP
`__getReplyNoReport, __noop, abor, acct, allo, allo, appe, cdup, cwd, dele, eprt, epsv, feat, getCommandSupport, getControlEncoding, getReply, getReplyCode, getReplyString, getReplyStrings, help, help, isStrictMultilineParsing, list, list, mdtm, mfmt, mkd, mlsd, mlsd, mlst, mlst, mode, nlst, nlst, noop, pass, pasv, port, pwd, quit, rein, rest, retr, rmd, rnfr, rnto, sendCommand, sendCommand, sendCommand, setControlEncoding, setStrictMultilineParsing, site, smnt, stat, stat, stor, stou, stou, stru, syst, type, type, user`

Methods inherited from class org.apache.commons.net.SocketClient
`addProtocolCommandListener, connect, connect, connect, connect, connect, connect, createCommandSupport, fireCommandSent, fireReplyReceived, getConnectTimeout, getDefaultPort, getDefaultTimeout, getKeepAlive, getLocalAddress, getLocalPort, getProxy, getReceiveBufferSize, getRemoteAddress, getRemotePort, getSendBufferSize, getServerSocketFactory, getSoLinger, getSoTimeout, getTcpNoDelay, isAvailable, isConnected, removeProtocolCommandListener, setConnectTimeout, setDefaultPort, setDefaultTimeout, setKeepAlive, setProxy, setReceiveBufferSize, setSendBufferSize, setServerSocketFactory, setSocketFactory, setSoLinger, setSoTimeout, setTcpNoDelay, verifyRemote`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### DEFAULT_FTPS_DATA_PORT

    public static final int DEFAULT_FTPS_DATA_PORT

See Also:
  Constant Field Values

### DEFAULT_FTPS_PORT

    public static final int DEFAULT_FTPS_PORT

See Also:
  Constant Field Values

### KEYSTORE_ALGORITHM

    @Deprecated
    public static String KEYSTORE_ALGORITHM

  Deprecated. - not used - may be removed in a future release

### TRUSTSTORE_ALGORITHM

    @Deprecated
    public static String TRUSTSTORE_ALGORITHM

  Deprecated. - not used - may be removed in a future release

### PROVIDER

    @Deprecated
    public static String PROVIDER

  Deprecated. - not used - may be removed in a future release

### STORE_TYPE

    @Deprecated
    public static String STORE_TYPE

  Deprecated. - not used - may be removed in a future release

Constructor Detail

### FTPSClient

    public FTPSClient()

  Constructor for FTPSClient, calls `FTPSClient(String, boolean)`. Sets protocol to `DEFAULT_PROTOCOL` - i.e. TLS - and security mode to explicit (isImplicit = false)

### FTPSClient

    public FTPSClient(boolean isImplicit)

  Constructor for FTPSClient, using `DEFAULT_PROTOCOL` - i.e. TLS Calls `FTPSClient(String, boolean)`

  Parameters:
    `isImplicit` - The security mode (Implicit/Explicit).

### FTPSClient

    public FTPSClient(String protocol)

  Constructor for FTPSClient, using explict mode, calls `FTPSClient(String, boolean)`.

  Parameters:
    `protocol` - the protocol to use

### FTPSClient

    public FTPSClient(String protocol,
                      boolean isImplicit)

  Constructor for FTPSClient allowing specification of protocol and security mode. If isImplicit is true, the port is set to `DEFAULT_FTPS_PORT` i.e. 990. The default TrustManager is set from `TrustManagerUtils.getValidateServerCertificateTrustManager()`

  Parameters:
    `protocol` - the protocol
    `isImplicit` - The security mode(Implicit/Explicit).

### FTPSClient

    public FTPSClient(boolean isImplicit,
                      SSLContext context)

  Constructor for FTPSClient, using `DEFAULT_PROTOCOL` - i.e. TLS The default TrustManager is set from `TrustManagerUtils.getValidateServerCertificateTrustManager()`

  Parameters:
    `isImplicit` - The security mode(Implicit/Explicit).
    `context` - A pre-configured SSL Context

### FTPSClient

    public FTPSClient(SSLContext context)

  Constructor for FTPSClient, using `DEFAULT_PROTOCOL` - i.e. TLS and isImplicit `false` Calls `FTPSClient(boolean, SSLContext)`

  Parameters:
    `context` - A pre-configured SSL Context

Method Detail

### setAuthValue

    public void setAuthValue(String auth)

  Set AUTH command use value. This processing is done before connected processing.

  Parameters:
    `auth` - AUTH command use value.

### getAuthValue

    public String getAuthValue()

  Return AUTH command use value.

  Returns:
    AUTH command use value.

### _connectAction_

    protected void _connectAction_()
                            throws IOException

  Because there are so many connect() methods, the _connectAction_() method is provided as a means of performing some action immediately after establishing a connection, rather than reimplementing all of the connect() methods.

  Overrides:
    `_connectAction_` in class `FTPClient`
  Throws:
    `IOException` - If it throw by _connectAction_.
  See Also:
    `SocketClient._connectAction_()`

### execAUTH

    protected void execAUTH()
                     throws SSLException,
                            IOException

  AUTH command.

  Throws:
    `SSLException` - If it server reply code not equal "234" and "334".
    `IOException` - If an I/O error occurs while either sending the command.

### sslNegotiation

    protected void sslNegotiation()
                           throws IOException

  SSL/TLS negotiation. Acquires an SSL socket of a control connection and carries out handshake processing.

  Throws:
    `IOException` - If server negotiation fails

### setKeyManager

    public void setKeyManager(KeyManager keyManager)

  Set a `KeyManager` to use

  Parameters:
    `keyManager` - The KeyManager implementation to set.
  See Also:
    `KeyManagerUtils`

### setEnabledSessionCreation

    public void setEnabledSessionCreation(boolean isCreation)

  Controls whether a new SSL session may be established by this socket.

  Parameters:
    `isCreation` - The established socket flag.

### getEnableSessionCreation

    public boolean getEnableSessionCreation()

  Returns true if new SSL sessions may be established by this socket. When the underlying `Socket` instance is not SSL-enabled (i.e. an instance of `SSLSocket` with `SSLSocket` `getEnableSessionCreation()`) enabled, this returns False.

  Returns:
    true - Indicates that sessions may be created; this is the default. false - indicates that an existing session must be resumed.

### setNeedClientAuth

    public void setNeedClientAuth(boolean isNeedClientAuth)

  Configures the socket to require client authentication.

  Parameters:
    `isNeedClientAuth` - The need client auth flag.

### getNeedClientAuth

    public boolean getNeedClientAuth()

  Returns true if the socket will require client authentication. When the underlying `Socket` is not an `SSLSocket` instance, returns false.

  Returns:
    true - If the server mode socket should request that the client authenticate itself.

### setWantClientAuth

    public void setWantClientAuth(boolean isWantClientAuth)

  Configures the socket to request client authentication, but only if such a request is appropriate to the cipher suite negotiated.

  Parameters:
    `isWantClientAuth` - The want client auth flag.

### getWantClientAuth

    public boolean getWantClientAuth()

  Returns true if the socket will request client authentication. When the underlying `Socket` is not an `SSLSocket` instance, returns false.

  Returns:
    true - If the server mode socket should request that the client authenticate itself.

### setUseClientMode

    public void setUseClientMode(boolean isClientMode)

  Configures the socket to use client (or server) mode in its first handshake.

  Parameters:
    `isClientMode` - The use client mode flag.

### getUseClientMode

    public boolean getUseClientMode()

  Returns true if the socket is set to use client mode in its first handshake. When the underlying `Socket` is not an `SSLSocket` instance, returns false.

  Returns:
    true - If the socket should start its first handshake in "client" mode.

### setEnabledCipherSuites

    public void setEnabledCipherSuites(String[] cipherSuites)

  Controls which particular cipher suites are enabled for use on this connection. Called before server negotiation.

  Parameters:
    `cipherSuites` - The cipher suites.

### getEnabledCipherSuites

    public String[] getEnabledCipherSuites()

  Returns the names of the cipher suites which could be enabled for use on this connection. When the underlying `Socket` is not an `SSLSocket` instance, returns null.

  Returns:
    An array of cipher suite names, or `null`

### setEnabledProtocols

    public void setEnabledProtocols(String[] protocolVersions)

  Controls which particular protocol versions are enabled for use on this connection. I perform setting before a server negotiation.

  Parameters:
    `protocolVersions` - The protocol versions.

### getEnabledProtocols

    public String[] getEnabledProtocols()

  Returns the names of the protocol versions which are currently enabled for use on this connection. When the underlying `Socket` is not an `SSLSocket` instance, returns null.

  Returns:
    An array of protocols, or `null`

### execPBSZ

    public void execPBSZ(long pbsz)
                  throws SSLException,
                         IOException

  PBSZ command. pbsz value: 0 to (2^32)-1 decimal integer.

  Parameters:
    `pbsz` - Protection Buffer Size.
  Throws:
    `SSLException` - If the server reply code does not equal "200".
    `IOException` - If an I/O error occurs while sending the command.
  See Also:
    `parsePBSZ(long)`

### parsePBSZ

    public long parsePBSZ(long pbsz)
                   throws SSLException,
                          IOException

  PBSZ command. pbsz value: 0 to (2^32)-1 decimal integer. Issues the command and parses the response to return the negotiated value.

  Parameters:
    `pbsz` - Protection Buffer Size.
  Returns:
    the negotiated value.
  Throws:
    `SSLException` - If the server reply code does not equal "200".
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0
  See Also:
    `execPBSZ(long)`

### execPROT

    public void execPROT(String prot)
                  throws SSLException,
                         IOException

  PROT command.
  - C - Clear
  - S - Safe(SSL protocol only)
  - E - Confidential(SSL protocol only)
  - P - Private
  N.B. the method calls `SocketClient.setSocketFactory(javax.net.SocketFactory)` and `SocketClient.setServerSocketFactory(javax.net.ServerSocketFactory)`

  Parameters:
    `prot` - Data Channel Protection Level, if `null`, use `DEFAULT_PROT`.
  Throws:
    `SSLException` - If the server reply code does not equal `200`.
    `IOException` - If an I/O error occurs while sending the command.

### sendCommand

    public int sendCommand(String command,
                           String args)
                    throws IOException

  Send an FTP command. A successful CCC (Clear Command Channel) command causes the underlying `SSLSocket` instance to be assigned to a plain `Socket`

  Overrides:
    `sendCommand` in class `FTP`
  Parameters:
    `command` - The FTP command.
    `args` - The arguments to the FTP command. If this parameter is set to null, then the command is sent with no argument.
  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
    `SSLException` - if a CCC command fails
  See Also:
    `FTP.sendCommand(java.lang.String)`

### _openDataConnection_

    protected Socket _openDataConnection_(int command,
                                          String arg)
                                   throws IOException

  Returns a socket of the data connection. Wrapped as an `SSLSocket`, which carries out handshake processing.

  Overrides:
    `_openDataConnection_` in class `FTPClient`
  Parameters:
    `command` - The int representation of the FTP command to send.
    `arg` - The arguments to the FTP command. If this parameter is set to null, then the command is sent with no arguments.
  Returns:
    corresponding to the established data connection. Null is returned if an FTP protocol error is reported at any point during the establishment and initialization of the connection.
  Throws:
    `IOException` - If there is any problem with the connection.
  See Also:
    `FTPClient._openDataConnection_(int, String)`

### _openDataConnection_

    protected Socket _openDataConnection_(String command,
                                          String arg)
                                   throws IOException

  Returns a socket of the data connection. Wrapped as an `SSLSocket`, which carries out handshake processing.

  Overrides:
    `_openDataConnection_` in class `FTPClient`
  Parameters:
    `command` - The textual representation of the FTP command to send.
    `arg` - The arguments to the FTP command. If this parameter is set to null, then the command is sent with no arguments.
  Returns:
    corresponding to the established data connection. Null is returned if an FTP protocol error is reported at any point during the establishment and initialization of the connection.
  Throws:
    `IOException` - If there is any problem with the connection.
  Since:
    3.2
  See Also:
    `FTPClient._openDataConnection_(int, String)`

### _prepareDataSocket_

    protected void _prepareDataSocket_(Socket socket)
                                throws IOException

  Performs any custom initialization for a newly created SSLSocket (before the SSL handshake happens). Called by `_openDataConnection_(int, String)` immediately after creating the socket. The default implementation is a no-op

  Throws:
    `IOException`
  Since:
    3.1

### getTrustManager

    public TrustManager getTrustManager()

  Get the currently configured `TrustManager`.

  Returns:
    A TrustManager instance.

### setTrustManager

    public void setTrustManager(TrustManager trustManager)

  Override the default `TrustManager` to use; if set to `null`, the default TrustManager from the JVM will be used.

  Parameters:
    `trustManager` - The TrustManager implementation to set, may be `null`
  See Also:
    `TrustManagerUtils`

### disconnect

    public void disconnect()
                    throws IOException

  Closes the connection to the FTP server and restores connection parameters to the default values.

  Calls `setSocketFactory(null)` and `setServerSocketFactory(null)` to reset the factories that may have been changed during the session, e.g. by `execPROT(String)`

  Overrides:
    `disconnect` in class `FTPClient`
  Throws:
    `IOException` - If an error occurs while disconnecting.
  Since:
    3.0

### execAUTH

    public int execAUTH(String mechanism)
                 throws IOException

  Send the AUTH command with the specified mechanism.

  Parameters:
    `mechanism` - The mechanism name to send with the command.
  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0

### execADAT

    public int execADAT(byte[] data)
                 throws IOException

  Send the ADAT command with the specified authentication data.

  Parameters:
    `data` - The data to send with the command.
  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0

### execCCC

    public int execCCC()
                throws IOException

  Send the CCC command to the server. The CCC (Clear Command Channel) command causes the underlying `SSLSocket` instance to be assigned to a plain `Socket` instances

  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0

### execMIC

    public int execMIC(byte[] data)
                throws IOException

  Send the MIC command with the specified data.

  Parameters:
    `data` - The data to send with the command.
  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0

### execCONF

    public int execCONF(byte[] data)
                 throws IOException

  Send the CONF command with the specified data.

  Parameters:
    `data` - The data to send with the command.
  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0

### execENC

    public int execENC(byte[] data)
                throws IOException

  Send the ENC command with the specified data.

  Parameters:
    `data` - The data to send with the command.
  Returns:
    server reply.
  Throws:
    `IOException` - If an I/O error occurs while sending the command.
  Since:
    3.0

### parseADATReply

    public byte[] parseADATReply(String reply)

  Parses the given ADAT response line and base64-decodes the data.

  Parameters:
    `reply` - The ADAT reply to parse.
  Returns:
    the data in the reply, base64-decoded.
  Since:
    3.0

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