# SFTPClient Component

The SFTPClient component can be used to transfer files to and from secure file transfer protocol (SFTP) servers.

## Syntax

```text
nsoftware.IPWorksEDI.SFTPClient
```

## Remarks

The SFTPClient component is the Secure Shell (SSH)-enabled equivalent of the IPWorks FTP component. The [SSHHost](#sshhost-property-sftpclient-component) and [SSHPort](#sshport-property-sftpclient-component) properties specify which Secure Shell (SSH) server to use. The [SSHUser](#sshuser-property-sftpclient-component) and [SSHPassword](#sshpassword-property-sftpclient-component) properties allow the client to authenticate itself with the server. The [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) event or [SSHAcceptServerHostKey](#sshacceptserverhostkey-property-sftpclient-component) property allow you to check the server identity. Finally, the [SSHStatus](#sshstatus-event-sftpclient-component) event provides information about the SSH handshake.

The SFTPClient component implements a standard SSH file transfer client.

The first step in using the component is specifying the [SSHHost](#sshhost-property-sftpclient-component), [SSHUser](#sshuser-property-sftpclient-component), and [SSHPassword](#sshpassword-property-sftpclient-component). The file to upload to or download from is given by the [RemoteFile](#remotefile-property-sftpclient-component) property. The file to download to or upload from is specified by [LocalFile](#localfile-property-sftpclient-component). The current path in the server is specified by the [RemotePath](#remotepath-property-sftpclient-component) property.

If [LocalFile](#localfile-property-sftpclient-component) is set to something other than an empty string, then files are received in [LocalFile](#localfile-property-sftpclient-component); otherwise, the data are received through the [Transfer](#transfer-event-sftpclient-component) event. [StartTransfer](#starttransfer-event-sftpclient-component) and [EndTransfer](#endtransfer-event-sftpclient-component) are fired at the beginning and end of transmission.

Directory listings are received through the [DirList](#dirlist-event-sftpclient-component) event.

## Property List

*The following is the full list of the properties of the component with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [Connected](#connected-property-sftpclient-component) | Whether the component is connected. |
| [DirList](#dirlist-property-sftpclient-component) | Collection of entries resulting in the last directory listing. |
| [FileAttributes](#fileattributes-property-sftpclient-component) | The attributes of the [RemoteFile](#remotefile-property-sftpclient-component) . |
| [Firewall](#firewall-property-sftpclient-component) | A set of properties related to firewall access. |
| [Idle](#idle-property-sftpclient-component) | The current status of the component. |
| [LocalFile](#localfile-property-sftpclient-component) | The path to a local file for upload or download. |
| [LocalHost](#localhost-property-sftpclient-component) | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| [LocalPort](#localport-property-sftpclient-component) | The TCP port in the local host where the component binds. |
| [Overwrite](#overwrite-property-sftpclient-component) | The value indicating whether or not the component should overwrite files during transfer. |
| [RemoteFile](#remotefile-property-sftpclient-component) | The name of the remote file for uploading or downloading. |
| [RemotePath](#remotepath-property-sftpclient-component) | The current path in the secure file transfer protocol (SFTP) server. |
| [SSHAcceptServerHostKey](#sshacceptserverhostkey-property-sftpclient-component) | Instructs the component to accept the server host key that matches the supplied key. |
| [SSHAuthMode](#sshauthmode-property-sftpclient-component) | The authentication method to be used with the component when calling [SSHLogon](#sshlogon-method-sftpclient-component) . |
| [SSHCert](#sshcert-property-sftpclient-component) | A certificate to be used for authenticating the [SSHUser](#sshuser-property-sftpclient-component) . |
| [SSHCompressionAlgorithms](#sshcompressionalgorithms-property-sftpclient-component) | The comma-separated list containing all allowable compression algorithms. |
| [SSHEncryptionAlgorithms](#sshencryptionalgorithms-property-sftpclient-component) | The comma-separated list containing all allowable encryption algorithms. |
| [SSHHost](#sshhost-property-sftpclient-component) | The address of the Secure Shell (SSH) host. |
| [SSHPassword](#sshpassword-property-sftpclient-component) | The password for Secure Shell (SSH) password-based authentication. |
| [SSHPort](#sshport-property-sftpclient-component) | The port on the Secure Shell (SSH) server where the SSH service is running; by default, 22. |
| [SSHUser](#sshuser-property-sftpclient-component) | The username for Secure Shell (SSH) authentication. |
| [StartByte](#startbyte-property-sftpclient-component) | The offset in bytes at which to begin the upload or download. |
| [Timeout](#timeout-property-sftpclient-component) | The timeout for the component. |

## Method List

*The following is the full list of the methods of the component with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [Append](#append-method-sftpclient-component) | Appends data from [LocalFile](#localfile-property-sftpclient-component) to a remote file [RemoteFile](#remotefile-property-sftpclient-component) on a secure file transfer protocol (SFTP) server. |
| [ChangeRemotePath](#changeremotepath-method-sftpclient-component) | Changes the current path on the server. |
| [CheckFileExists](#checkfileexists-method-sftpclient-component) | Returns True if the file specified by [RemoteFile](#remotefile-property-sftpclient-component) exists on the remote server. |
| [Config](#config-method-sftpclient-component) | Sets or retrieves a configuration setting. |
| [Connect](#connect-method-sftpclient-component) | Connects to the Secure Shell (SSH) host. |
| [CopyRemoteData](#copyremotedata-method-sftpclient-component) | Copies a range of bytes from one remote file to another directly on the secure file transfer protocol (SFTP) server. |
| [CopyRemoteFile](#copyremotefile-method-sftpclient-component) | Copies a remote file directly on the secure file transfer protocol (SFTP) server. |
| [CreateFile](#createfile-method-sftpclient-component) | Creates a file on the secure file transfer protocol (SFTP) server. |
| [DecodePacket](#decodepacket-method-sftpclient-component) | Decodes a hex-encoded Secure Shell (SSH) packet |
| [DeleteFile](#deletefile-method-sftpclient-component) | Deletes a file specified by FileName from a secure file transfer protocol (SFTP) server. |
| [Disconnect](#disconnect-method-sftpclient-component) | Disconnects from the server without first logging off. |
| [DoEvents](#doevents-method-sftpclient-component) | This method processes events from the internal message queue. |
| [Download](#download-method-sftpclient-component) | Downloads a [RemoteFile](#remotefile-property-sftpclient-component) from a secure file transfer protocol (SFTP) server. |
| [DownloadRange](#downloadrange-method-sftpclient-component) | Facilitates the partial downloading of a remote file from a secure file transfer protocol (SFTP) server. |
| [EncodePacket](#encodepacket-method-sftpclient-component) | Hex encodes a Secure Shell (SSH) packet. |
| [GetSSHParam](#getsshparam-method-sftpclient-component) | Reads a field from a Secure Shell (SSH) packet's payload. |
| [GetSSHParamBytes](#getsshparambytes-method-sftpclient-component) | Reads a field from a Secure Shell (SSH) packet's payload. |
| [Interrupt](#interrupt-method-sftpclient-component) | This method interrupts the current method. |
| [ListDirectory](#listdirectory-method-sftpclient-component) | Lists the current directory specified by [RemotePath](#remotepath-property-sftpclient-component) on a secure file transfer protocol (SFTP) server. |
| [MakeDirectory](#makedirectory-method-sftpclient-component) | Creates a directory on a secure file transfer protocol (SFTP) server. |
| [QueryFileAttributes](#queryfileattributes-method-sftpclient-component) | Queries the server for the attributes of [RemoteFile](#remotefile-property-sftpclient-component) |
| [QueueFile](#queuefile-method-sftpclient-component) | Adds a file to the transfer queue. |
| [RemoveDirectory](#removedirectory-method-sftpclient-component) | Removes a directory specified by DirName from a secure file transfer protocol (SFTP) server. |
| [RenameFile](#renamefile-method-sftpclient-component) | Changes the name of [RemoteFile](#remotefile-property-sftpclient-component) to NewName . |
| [Reset](#reset-method-sftpclient-component) | This method will reset the component. |
| [ResetQueue](#resetqueue-method-sftpclient-component) | Resets the queue of files to be transferred. |
| [SetDownloadStream](#setdownloadstream-method-sftpclient-component) | Sets the stream to which the downloaded data from the server will be written. |
| [SetSSHParam](#setsshparam-method-sftpclient-component) | Writes a field to the end of a payload. |
| [SetUploadStream](#setuploadstream-method-sftpclient-component) | Sets the stream from which the component will read data to upload to the server. |
| [SSHLogoff](#sshlogoff-method-sftpclient-component) | Logs off from the Secure Shell (SSH) server. |
| [SSHLogon](#sshlogon-method-sftpclient-component) | Logs on to the [SSHHost](#sshhost-property-sftpclient-component) using the current [SSHUser](#sshuser-property-sftpclient-component) and [SSHPassword](#sshpassword-property-sftpclient-component) . |
| [UpdateFileAttributes](#updatefileattributes-method-sftpclient-component) | Instructs the component to send the [FileAttributes](#fileattributes-property-sftpclient-component) to the server. |
| [Upload](#upload-method-sftpclient-component) | Uploads a file specified by [LocalFile](#localfile-property-sftpclient-component) to a secure file transfer protocol (SFTP) server. |
| [UploadRange](#uploadrange-method-sftpclient-component) | Inserts data into a remote file on a secure file transfer protocol (SFTP) server. |

## Event List

*The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [Connected](#connected-event-sftpclient-component) | Fired immediately after a connection completes (or fails). |
| [ConnectionStatus](#connectionstatus-event-sftpclient-component) | Fired to indicate changes in the connection state. |
| [DirList](#dirlist-event-sftpclient-component) | Fired when a directory entry is received. |
| [Disconnected](#disconnected-event-sftpclient-component) | Fired when a connection is closed. |
| [EndTransfer](#endtransfer-event-sftpclient-component) | Fired when a file completes downloading or uploading. |
| [Error](#error-event-sftpclient-component) | Fired when errors occur during data delivery. |
| [Log](#log-event-sftpclient-component) | Fired once for each log message. |
| [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) | Fired when the component is doing a custom authentication. |
| [SSHKeyboardInteractive](#sshkeyboardinteractive-event-sftpclient-component) | Fired when the component receives a request for user input from the server. |
| [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) | Fired after the server presents its public key to the client. |
| [SSHStatus](#sshstatus-event-sftpclient-component) | Fired to track the progress of the secure connection. |
| [StartTransfer](#starttransfer-event-sftpclient-component) | Fired when a file starts downloading or uploading. |
| [Transfer](#transfer-event-sftpclient-component) | Fired during file download or upload. |

## Config Settings

*The following is a list of config settings for the component with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [AllowBackslashInName](#AllowBackslashInName) | Whether backslashes are allowed in folder and file names. |
| [AsyncTransfer](#AsyncTransfer) | Controls whether simultaneous requests are made to read or write files. |
| [AttrAccessTime](#AttrAccessTime) | Can be queried for the AccessTime file attribute during the DirList event. |
| [AttrCreationTime](#AttrCreationTime) | Can be queried for the CreationTime file attribute during the DirList event. |
| [AttrFileType](#AttrFileType) | Can be queried for the FileType file attribute during the DirList event. |
| [AttrGroupId](#AttrGroupId) | Can be queried for the GroupId file attribute during the DirList event. |
| [AttrLinkCount](#AttrLinkCount) | Can be queried for the LinkCount file attribute during the DirList event. |
| [AttrOwnerId](#AttrOwnerId) | Can be queried for the OwnerId file attribute during the DirList event. |
| [AttrPermission](#AttrPermission) | Can be queried for the Permissions file attribute during the DirList event. |
| [CheckFileHash](#CheckFileHash) | Compares a server-computed hash with a hash calculated locally. |
| [DisableRealPath](#DisableRealPath) | Controls whether or not the SSH_FXP_REALPATH request is sent. |
| [ExcludeFileMask](#ExcludeFileMask) | Specifies a file mask for excluding files in directory listings. |
| [ExecFallbackCommand](#ExecFallbackCommand) | Specifies the fallback command to execute if the component fails to start the SFTP subsystem. |
| [FileMaskDelimiter](#FileMaskDelimiter) | Specifies a delimiter to use for setting multiple file masks in the RemoteFile property. |
| [FiletimeFormat](#FiletimeFormat) | Specifies the format to use when returning filetime strings. |
| [ForceMakeDirectory](#ForceMakeDirectory) | Controls whether calls to make a directory always attempt to create the directory on the server. |
| [FreeSpace](#FreeSpace) | The free space on the remote server in bytes. |
| [GetSpaceInfo](#GetSpaceInfo) | Queries the server for drive usage information. |
| [GetSymlinkAttrs](#GetSymlinkAttrs) | Whether to get the attributes of the symbolic link, or the resource pointed to by the link. |
| [IgnoreFileMaskCasing](#IgnoreFileMaskCasing) | Controls whether or not the file mask is case sensitive. |
| [LocalEOL](#LocalEOL) | When TransferMode is set, this specifies the line ending for the local system. |
| [LogSFTPFileData](#LogSFTPFileData) | Whether SFTP file data is present in Debug logs. |
| [MaskSensitiveData](#MaskSensitiveData) | Masks passwords in logs. |
| [MaxFileData](#MaxFileData) | Specifies the maximum payload size of an SFTP packet. |
| [MaxOutstandingPackets](#MaxOutstandingPackets) | Sets the maximum number of simultaneous read or write requests allowed. |
| [NegotiatedProtocolVersion](#NegotiatedProtocolVersion) | The negotiated SFTP version. |
| [NormalizeRemotePath](#NormalizeRemotePath) | Whether to normalize the RemotePath. |
| [PreserveFileTime](#PreserveFileTime) | Preserves the file's timestamps during transfer. |
| [ProtocolVersion](#ProtocolVersion) | The highest allowable SFTP version to use. |
| [ReadLink](#ReadLink) | This settings returns the target of a specified symbolic link. |
| [RealPathControlFlag](#RealPathControlFlag) | Specifies the control-byte field sent in the SSH_FXP_REALPATH request. |
| [RealTimeUpload](#RealTimeUpload) | Enables real time uploading. |
| [RealTimeUploadAgeLimit](#RealTimeUploadAgeLimit) | The age limit in seconds when using RealTimeUpload. |
| [ServerEOL](#ServerEOL) | When TransferMode is set, this specifies the line ending for the remote system. |
| [SimultaneousTransferLimit](#SimultaneousTransferLimit) | The maximum number of simultaneous file transfers. |
| [TotalSpace](#TotalSpace) | The total space on the remote server in bytes. |
| [TransferMode](#TransferMode) | The transfer mode (ASCII or Binary). |
| [TransferredDataLimit](#TransferredDataLimit) | Specifies the maximum number of bytes to download from the remote file. |
| [UseFxpStat](#UseFxpStat) | Whether SSH_FXP_STAT is sent. |
| [ChannelDataEOL\[ChannelId\]](#ChannelDataEOL[ChannelId]) | Used to break the incoming data stream into chunks. |
| [ChannelDataEOLFound\[ChannelId\]](#ChannelDataEOLFound[ChannelId]) | Determines if ChannelDataEOL was found. |
| [ClientSSHVersionString](#ClientSSHVersionString) | The SSH version string used by the component. |
| [ConnectAndLogin](#ConnectAndLogin) | Whether the component performs a full SSH login. |
| [DoNotRepeatAuthMethods](#DoNotRepeatAuthMethods) | Whether the component will repeat authentication methods during multifactor authentication. |
| [EnablePageantAuth](#EnablePageantAuth) | Whether to use a key stored in Pageant to perform client authentication. |
| [KerberosDelegation](#KerberosDelegation) | If true, asks for credentials with delegation enabled during authentication. |
| [KerberosRealm](#KerberosRealm) | The fully qualified domain name of the Kerberos Realm to use for GSSAPI authentication. |
| [KerberosSPN](#KerberosSPN) | The Kerberos Service Principal Name of the SSH host. |
| [KeyRenegotiationThreshold](#KeyRenegotiationThreshold) | Sets the threshold for the SSH Key Renegotiation. |
| [LogLevel](#LogLevel) | Specifies the level of detail that is logged. |
| [MaxChannelDataLength\[ChannelId\]](#MaxChannelDataLength[ChannelId]) | The maximum amount of data to accumulate when no ChannelDataEOL is found. |
| [MaxPacketSize](#MaxPacketSize) | The maximum packet size of the channel, in bytes. |
| [MaxWindowSize](#MaxWindowSize) | The maximum window size allowed for the channel, in bytes. |
| [NegotiatedStrictKex](#NegotiatedStrictKex) | Returns whether strict key exchange was negotiated to be used. |
| [PasswordPrompt](#PasswordPrompt) | The text of the password prompt used in keyboard-interactive authentication. |
| [PreferredDHGroupBits](#PreferredDHGroupBits) | The size (in bits) of the preferred modulus (p) to request from the server. |
| [RecordLength](#RecordLength) | The length of received data records. |
| [ServerSSHVersionString](#ServerSSHVersionString) | The remote host's SSH version string. |
| [SignedSSHCert](#SignedSSHCert) | The CA signed client public key used when authenticating. |
| [SSHAcceptAnyServerHostKey](#SSHAcceptAnyServerHostKey) | If set the component will accept any key presented by the server. |
| [SSHAcceptServerCAKey](#SSHAcceptServerCAKey) | The CA public key that signed the server's host key. |
| [SSHAcceptServerHostKeyFingerPrint](#SSHAcceptServerHostKeyFingerPrint) | The fingerprint(s) of the server host keys to accept. |
| [SSHFingerprintEncoding](#SSHFingerprintEncoding) | Specifies the encoding used when displaying the SSH host key fingerprint. |
| [SSHFingerprintHashAlgorithm](#SSHFingerprintHashAlgorithm) | The algorithm used to calculate the fingerprint. |
| [SSHFingerprintMD5](#SSHFingerprintMD5) | The server hostkey's MD5 fingerprint. |
| [SSHFingerprintSHA1](#SSHFingerprintSHA1) | The server hostkey's SHA1 fingerprint. |
| [SSHFingerprintSHA256](#SSHFingerprintSHA256) | The server hostkey's SHA256 fingerprint. |
| [SSHKeepAliveCountMax](#SSHKeepAliveCountMax) | The maximum number of keep alive packets to send without a response. |
| [SSHKeepAliveInterval](#SSHKeepAliveInterval) | The interval between keep alive packets. |
| [SSHKeyExchangeAlgorithms](#SSHKeyExchangeAlgorithms) | Specifies the supported key exchange algorithms. |
| [SSHKeyRenegotiate](#SSHKeyRenegotiate) | Causes the component to renegotiate the SSH keys. |
| [SSHMacAlgorithms](#SSHMacAlgorithms) | Specifies the supported Mac algorithms. |
| [SSHPubKeyAuthSigAlgorithms](#SSHPubKeyAuthSigAlgorithms) | Specifies the enabled signature algorithms that may be used when attempting public key authentication. |
| [SSHPublicKeyAlgorithms](#SSHPublicKeyAlgorithms) | Specifies the supported public key algorithms for the server's public key. |
| [SSHVersionPattern](#SSHVersionPattern) | The pattern used to match the remote host's version string. |
| [TryAllAvailableAuthMethods](#TryAllAvailableAuthMethods) | If set to true, the component will try all available authentication methods. |
| [UseStrictKeyExchange](#UseStrictKeyExchange) | Specifies how strict key exchange is supported. |
| [WaitForChannelClose](#WaitForChannelClose) | Whether to wait for channels to be closed before disconnected. |
| [WaitForServerDisconnect](#WaitForServerDisconnect) | Whether to wait for the server to close the connection. |
| [BuildInfo](#BuildInfo) | Information about the product's build. |
| [GUIAvailable](#GUIAvailable) | Whether or not a message loop is available for processing events. |
| [LicenseInfo](#LicenseInfo) | Information about the current license. |
| [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. |
| [UseFIPSCompliantAPI](#UseFIPSCompliantAPI) | Tells the component whether or not to use FIPS certified APIs. |
| [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. |

# Connected Property ([SFTPClient](#sftpclient-component) Component)

Whether the component is connected.

## Syntax

```text
public bool Connected { get; }
```

## Default Value

False

## Remarks

This property is used to determine whether or not the component is connected to the remote host. Use the [Connect](#connect-method-sftpclient-component) and [Disconnect](#disconnect-method-sftpclient-component) methods to manage the connection.

This property is read-only and not available at design time.

# DirList Property ([SFTPClient](#sftpclient-component) Component)

Collection of entries resulting in the last directory listing.

## Syntax

```text
public DirEntryList DirList { get; }
```

## Remarks

This collection of entries is returned after a response is received from the server after a call to [ListDirectory](#listdirectory-method-sftpclient-component). The collection is made up of entries for each listing in the current directory, which is specified by the [RemotePath](#remotepath-property-sftpclient-component) property.

[MaxDirEntries](#MaxDirEntries) can be used to control the number of directory listings saved.

This collection is indexed from *0* to *Count - 1*.

This property is read-only and not available at design time.

 Please refer to the [DirEntry](#direntry-type) type for a complete list of fields.

# FileAttributes Property ([SFTPClient](#sftpclient-component) Component)

The attributes of the [RemoteFile](#remotefile-property-sftpclient-component) .

## Syntax

```text
public SFTPFileAttributes FileAttributes { get; set; }
```

## Remarks

This property holds the attributes for the file specified by [RemoteFile](#remotefile-property-sftpclient-component). Before querying this property, first call [QueryFileAttributes](#queryfileattributes-method-sftpclient-component) to retrieve the attributes from the server.

To modify the attributes of the file, you may set FileAttributes and then call [UpdateFileAttributes](#updatefileattributes-method-sftpclient-component).

This property is not available at design time.

 Please refer to the [SFTPFileAttributes](#sftpfileattributes-type) type for a complete list of fields.

# Firewall Property ([SFTPClient](#sftpclient-component) Component)

A set of properties related to firewall access.

## Syntax

```text
public Firewall Firewall { get; set; }
```

## Remarks

This is a [Firewall](#firewall-type)-type property, which contains fields describing the firewall through which the component will attempt to connect.

 Please refer to the [Firewall](#firewall-type) type for a complete list of fields.

# Idle Property ([SFTPClient](#sftpclient-component) Component)

The current status of the component.

## Syntax

```text
public bool Idle { get; }
```

## Default Value

True

## Remarks

This property will be False if the component is currently busy (communicating or waiting for an answer), and True at all other times.

This property is read-only.

# LocalFile Property ([SFTPClient](#sftpclient-component) Component)

The path to a local file for upload or download.

## Syntax

```text
public string LocalFile { get; set; }
```

## Default Value

""

## Remarks

The LocalFile property is used by the [Upload](#upload-method-sftpclient-component) and [Download](#download-method-sftpclient-component) methods. The file will be overwritten only if the [Overwrite](#overwrite-property-sftpclient-component) property is set to True.

**Example. Setting LocalFile:**

```text
SFTPControl.Localfile = "C:\localfile.txt"
SFTPControl.RemoteFile = "remotefile.txt"
SFTPControl.Download()

SFTPControl.Localfile = "C:\localfile2.txt"
SFTPControl.RemoteFile = "folder/remotefile2.txt"
SFTPControl.Download()
```

# LocalHost Property ([SFTPClient](#sftpclient-component) Component)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

## Syntax

```text
public string LocalHost { get; set; }
```

## Default Value

""

## Remarks

This property contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address.

In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.

If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

# LocalPort Property ([SFTPClient](#sftpclient-component) Component)

The TCP port in the local host where the component binds.

## Syntax

```text
public int LocalPort { get; set; }
```

## Default Value

0

## Remarks

This property must be set before a connection is attempted. It instructs the component to bind to a specific port (or communication endpoint) in the local machine.

Setting this property to 0 (default) enables the system to choose an open port at random. The chosen port will be returned by the LocalPort property after the connection is established.

LocalPort cannot be changed once a connection is made. Any attempt to set this property when a connection is active will generate an error.

This property is useful when trying to connect to services that require a trusted port on the client side.

# Overwrite Property ([SFTPClient](#sftpclient-component) Component)

The value indicating whether or not the component should overwrite files during transfer.

## Syntax

```text
public bool Overwrite { get; set; }
```

## Default Value

False

## Remarks

This property is a value indicating whether or not the component should overwrite [LocalFile](#localfile-property-sftpclient-component) when downloading and [RemoteFile](#remotefile-property-sftpclient-component) when uploading. If Overwrite is False, an error will be thrown whenever [LocalFile](#localfile-property-sftpclient-component) exists before a download operation.

# RemoteFile Property ([SFTPClient](#sftpclient-component) Component)

The name of the remote file for uploading or downloading.

## Syntax

```text
public string RemoteFile { get; set; }
```

## Default Value

""

## Remarks

The RemoteFile is either an absolute file path or a relative path based on [RemotePath](#remotepath-property-sftpclient-component).

A number of methods use RemoteFile as an argument.

**Example 1. Setting RemoteFile:**

```text
SFTPControl.Localfile = "C:\localfile.txt"
SFTPControl.RemoteFile = "remotefile.txt"
SFTPControl.Download()

SFTPControl.Localfile = "C:\localfile2.txt"
SFTPControl.RemoteFile = "folder/remotefile2.txt"
SFTPControl.Download()
```

NOTE: This property will also act as a file mask when performing [ListDirectory](#listdirectory-method-sftpclient-component).

**Example 2. Using RemoteFile as a File Mask:**

```text
SFTPControl.RemoteFile = "*.txt"
SFTPControl.ListDirectory()
```

The following special characters are supported for pattern matching:

|  |  |
| --- | --- |
| ? | Any single character. |
| * | Any characters or no characters (e.g., C*t matches Cat, Cot, Coast, Ct). |
| [,-] | A range of characters (e.g., [a-z], [a], [0-9], [0-9,a-d,f,r-z]). |
| \ | The slash is ignored and exact matching is performed on the next character. |

If these characters need to be used as a literal in a pattern, then they must be escaped by surrounding them with brackets []. NOTE: "]" and "-" do not need to be escaped. See below for the escape sequences:

| Character | Escape Sequence |
| --- | --- |
| ? | [?] |
| * | [*] |
| [ | [[] |
| \ | [\] |

For example, to match the value [Something].txt, specify the pattern [[]Something].txt.

# RemotePath Property ([SFTPClient](#sftpclient-component) Component)

The current path in the secure file transfer protocol (SFTP) server.

## Syntax

```text
public string RemotePath { get; }
```

## Default Value

""

## Remarks

The RemotePath shows the current working directory on the SFTP server. The [ChangeRemotePath](#changeremotepath-method-sftpclient-component) method can be used to change the working directory to an absolute directory path or to a relative path with respect to the current value of RemotePath.

**Example. Changing Directory:**

```text
sftp1.SSHLogon("sftp.server.net", 22);
sftp1.ChangeRemotePath("/home/user");
```

This property is read-only.

# SSHAcceptServerHostKey Property ([SFTPClient](#sftpclient-component) Component)

Instructs the component to accept the server host key that matches the supplied key.

## Syntax

```text
public Certificate SSHAcceptServerHostKey { get; set; }
```

## Remarks

If the host key that will be used by the server is known in advance, this property may be set to accept the expected key. Otherwise, the [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) event should be trapped, and the key should be accepted or refused in the event.

If this property is not set and the [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) event is not trapped, the server will not be authenticated and the connection will be terminated by the client.

 Please refer to the [Certificate](#certificate-type) type for a complete list of fields.

# SSHAuthMode Property ([SFTPClient](#sftpclient-component) Component)

The authentication method to be used with the component when calling [SSHLogon](#sshlogon-method-sftpclient-component) .

## Syntax

```text
public SFTPClientSSHAuthModes SSHAuthMode { get; set; }
enum SFTPClientSSHAuthModes {
  amNone,
  amMultiFactor,
  amPassword,
  amPublicKey,
  amKeyboardInteractive,
  amGSSAPIWithMic,
  amGSSAPIKeyex,
  amCustom
}
```

## Default Value

2

## Remarks

The Secure Shell (SSH) Authentication specification (RFC 4252) specifies multiple methods by which a user can be authenticated by an SSH server. When a call is made to [SSHLogon](#sshlogon-method-sftpclient-component), the component will connect to the SSH server and establish the security layer. After the connection has been secured, the client will send an authentication request to the [SSHHost](#sshhost-property-sftpclient-component) containing the [SSHUser](#sshuser-property-sftpclient-component). The server will respond containing a list of methods by which that user may be authenticated.

The component will attempt to authenticate the user by one of those methods based on the value of SSHAuthMode and other property values supplied by the user. Currently, the component supports the following authentication methods:

|  |  |
| --- | --- |
| amNone (0) | No authentication will be performed. The current [SSHUser](#sshuser-property-sftpclient-component) value is ignored, and the connection will be logged as anonymous. |
| amMultiFactor (1) | This allows the component to attempt a multistep authentication process. The component will send authentication data to the server based on the list of methods allowed for the current user and the authentication property values supplied. The component will continue to send authentication data until the server acknowledges authentication success. If the server rejects an authentication step, the component throws an exception. |
| amPassword (2) | The component will use the values of [SSHUser](#sshuser-property-sftpclient-component) and [SSHPassword](#sshpassword-property-sftpclient-component) to authenticate the user. |
| amPublicKey (3) | The component will use the values of [SSHUser](#sshuser-property-sftpclient-component) and [SSHCert](#sshcert-property-sftpclient-component) to authenticate the user. [SSHCert](#sshcert-property-sftpclient-component) must have a private key available for this authentication method to succeed. |
| amKeyboardInteractive (4) | At the time of authentication, the component will fire the [SSHKeyboardInteractive](#sshkeyboardinteractive-event-sftpclient-component) event containing instructions on how to complete the authentication step. NOTE: amKeyboardInteractive is not supported in SSHTunnel. |
| amGSSAPIWithMic (5) | This allows the component to attempt Kerberos authentication using the GSSAPI-WITH-MIC scheme. The client will try Kerberos authentication using the value of [SSHUser](#sshuser-property-sftpclient-component) (single sign-on), or if [SSHPassword](#sshpassword-property-sftpclient-component) is specified as well, it will try Kerberos authentication with alternate credentials. This is currently supported only on Windows, unless using the Java edition, which also provides support for Linux and macOS. |
| amGSSAPIKeyex (6) | This allows the component to attempt Kerberos authentication using the GSSAPIKeyex scheme. The client will try Kerberos authentication using the value of [SSHUser](#sshuser-property-sftpclient-component) (single sign-on), or if [SSHPassword](#sshpassword-property-sftpclient-component) is specified as well, it will try Kerberos authentication with alternate credentials. This is currently supported only on Windows, unless using the Java edition, which also provides support for Linux and macOS. |
| amCustom (99) | This allows the component caller to take over the authentication process completely. When amCustom is set, the component will fire the [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) event as necessary to complete the authentication process. |

**Example 1. User/Password Authentication:**

```text
Control.SSHAuthMode = SftpSSHAuthModes.amPassword
Control.SSHUser = "username"
Control.SSHPassword = "password"
Control.SSHLogon("server", 22)
```

 **Example 2. Public Key Authentication:**

```text
Control.SSHAuthMode = SftpSSHAuthModes.amPublicKey
Control.SSHUser = "username"

Control.SSHCert = New Certificate(CertStoreTypes.cstPFXFile, "cert.pfx", "certpassword", "*")
Control.SSHLogon("server", 22)
```

# SSHCert Property ([SFTPClient](#sftpclient-component) Component)

A certificate to be used for authenticating the [SSHUser](#sshuser-property-sftpclient-component) .

## Syntax

```text
public Certificate SSHCert { get; set; }
```

## Remarks

To use public key authentication, SSHCert must contain a [Certificate](#certificate-type) with a valid private key. The certificate's public key value is sent to the server along with a signature produced using the private key. The server will first check to see if the public key values match what is known for the user, and then it will attempt to use those values to verify the signature.

**Example 1. User/Password Authentication:**

```text
Control.SSHAuthMode = SftpSSHAuthModes.amPassword
Control.SSHUser = "username"
Control.SSHPassword = "password"
Control.SSHLogon("server", 22)
```

 **Example 2. Public Key Authentication:**

```text
Control.SSHAuthMode = SftpSSHAuthModes.amPublicKey
Control.SSHUser = "username"

Control.SSHCert = New Certificate(CertStoreTypes.cstPFXFile, "cert.pfx", "certpassword", "*")
Control.SSHLogon("server", 22)
```

 Please refer to the [Certificate](#certificate-type) type for a complete list of fields.

# SSHCompressionAlgorithms Property ([SFTPClient](#sftpclient-component) Component)

The comma-separated list containing all allowable compression algorithms.

## Syntax

```text
public string SSHCompressionAlgorithms { get; set; }
```

## Default Value

"none,zlib"

## Remarks

During the Secure Shell (SSH) handshake, this list will be used to negotiate the compression algorithm to be used between the client and server. This list is used for both directions: client to server and server to client. When negotiating algorithms, each side sends a list of all algorithms it supports or allows. The algorithm chosen for each direction is the first algorithm to appear in the sender's list that the receiver supports. Therefore, it is important to list multiple algorithms in preferential order. If no algorithm can be agreed on, the component will raise an error and the connection will be aborted.

At least one supported algorithm must appear in this list. The following compression algorithms are supported by the component:

- zlib
- zlib@openssh.com
- none

# SSHEncryptionAlgorithms Property ([SFTPClient](#sftpclient-component) Component)

The comma-separated list containing all allowable encryption algorithms.

## Syntax

```text
public string SSHEncryptionAlgorithms { get; set; }
```

## Default Value

"aes256-ctr,aes192-ctr,aes128-ctr,3des-ctr,aes256-gcm@openssh.com,aes128-gcm@openssh.com,chacha20-poly1305@openssh.com"

## Remarks

During the Secure Shell (SSH) handshake, this list will be used to negotiate the encryption algorithm to be used between the client and server. This list is used for both directions: client to server and server to client. When negotiating algorithms, each side sends a list of all algorithms it supports or allows. The algorithm chosen for each direction is the first algorithm to appear in the sender's list that the receiver supports. Therefore, it is important to list multiple algorithms in preferential order. If no algorithm can be agreed on, the component will raise an error and the connection will be aborted.

At least one supported algorithm must appear in this list. The following encryption algorithms are supported by the component:

- aes256-ctr
- aes256-cbc
- aes192-ctr
- aes192-cbc
- aes128-ctr
- aes128-cbc
- 3des-ctr
- 3des-cbc
- cast128-cbc
- blowfish-cbc
- arcfour
- arcfour128
- arcfour256
- aes256-gcm@openssh.com
- aes128-gcm@openssh.com
- chacha20-poly1305@openssh.com

# SSHHost Property ([SFTPClient](#sftpclient-component) Component)

The address of the Secure Shell (SSH) host.

## Syntax

```text
public string SSHHost { get; set; }
```

## Default Value

""

## Remarks

The SSHHost property specifies the IP address (IP number in dotted internet format) or domain name of the remote host. It is set before a connection is attempted and cannot be changed once a connection is established.

If the SSHHost property is set to a domain name, a DNS request is initiated, and upon successful termination of the request, the SSHHost property is set to the corresponding address. If the search is not successful, an error is returned.

The SSHHost must be the same host that will be assumed for SSH as for the remote service being connected to.

# SSHPassword Property ([SFTPClient](#sftpclient-component) Component)

The password for Secure Shell (SSH) password-based authentication.

## Syntax

```text
public string SSHPassword { get; set; }
```

## Default Value

""

## Remarks

SSHPassword specifies the password that is used to authenticate the client to the SSH server.

# SSHPort Property ([SFTPClient](#sftpclient-component) Component)

The port on the Secure Shell (SSH) server where the SSH service is running; by default, 22.

## Syntax

```text
public int SSHPort { get; set; }
```

## Default Value

22

## Remarks

The SSHPort specifies a service port on the SSH host to connect to.

A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

# SSHUser Property ([SFTPClient](#sftpclient-component) Component)

The username for Secure Shell (SSH) authentication.

## Syntax

```text
public string SSHUser { get; set; }
```

## Default Value

""

## Remarks

SSHUser specifies the username that is used to authenticate the client to the SSH server. This property is required.

**Example 1. User/Password Authentication:**

```text
Control.SSHAuthMode = SftpSSHAuthModes.amPassword
Control.SSHUser = "username"
Control.SSHPassword = "password"
Control.SSHLogon("server", 22)
```

 **Example 2. Public Key Authentication:**

```text
Control.SSHAuthMode = SftpSSHAuthModes.amPublicKey
Control.SSHUser = "username"

Control.SSHCert = New Certificate(CertStoreTypes.cstPFXFile, "cert.pfx", "certpassword", "*")
Control.SSHLogon("server", 22)
```

# StartByte Property ([SFTPClient](#sftpclient-component) Component)

The offset in bytes at which to begin the upload or download.

## Syntax

```text
public long StartByte { get; set; }
```

## Default Value

0

## Remarks

The StartByte property is used by the [Upload](#upload-method-sftpclient-component) and [Download](#download-method-sftpclient-component) methods to determine at what offset to begin the transfer. This allows for resuming both uploads and downloads. The value of this property is reset to *0* after a successful transfer. StartByte is not valid for use with [Append](#append-method-sftpclient-component).

When downloading, this property can be used in conjunction with the [TransferredDataLimit](#TransferredDataLimit) configuration setting to download only a specific range of data from the current [RemoteFile](#remotefile-property-sftpclient-component).

# Timeout Property ([SFTPClient](#sftpclient-component) Component)

The timeout for the component.

## Syntax

```text
public int Timeout { get; set; }
```

## Default Value

60

## Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the component will wait for the operation to complete before returning control.

The component will use [DoEvents](#doevents-method-sftpclient-component) to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive.

If Timeout expires, and the operation is not yet complete, the component throws an exception.

NOTE: By default, all timeouts are *inactivity timeouts*, that is, the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

# Append Method ([SFTPClient](#sftpclient-component) Component)

Appends data from [LocalFile](#localfile-property-sftpclient-component) to a remote file [RemoteFile](#remotefile-property-sftpclient-component) on a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void Append();

Async Version
public async Task Append();
public async Task Append(CancellationToken cancellationToken);
```

## Remarks

This method is similar to the [Upload](#upload-method-sftpclient-component) method, but the local file specified by [LocalFile](#localfile-property-sftpclient-component) is appended to [RemoteFile](#remotefile-property-sftpclient-component) on the server as opposed to replacing it as with the [Upload](#upload-method-sftpclient-component) method. [RemoteFile](#remotefile-property-sftpclient-component) is either an absolute path on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component). The server will create a file with that name if it does not already exist (similar to upload).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

# ChangeRemotePath Method ([SFTPClient](#sftpclient-component) Component)

Changes the current path on the server.

## Syntax

```text
public void ChangeRemotePath(string remotePath);

Async Version
public async Task ChangeRemotePath(string remotePath);
public async Task ChangeRemotePath(string remotePath, CancellationToken cancellationToken);
```

## Remarks

This method changes the current path on the server to the specified *RemotePath*. When called, the component will issue a command to the server to change the directory. The *RemotePath* parameter may hold an absolute or relative path.

**Absolute Paths**

If the path begins with a */*, it is considered an absolute path and must specify the entire path from the root of the server. For example:

```csharp
component.ChangeRemotePath("/home/testuser/myfolder");
```

**Relative Paths**

If the path does not begin with a */*, it is considered a relative path and is resolved in relation to the current directory. For instance, a value of *myfolder* will indicate a subfolder of the current directory. The special value *..* refers to the parent directory of the current path. For example:

```csharp
//Change to the 'myfolder' sub-directory
component.ChangeRemotePath("myfolder");
//Navigate up two levels and then into the 'another/folder' path.
component.ChangeRemotePath("../../another/folder");
```

# CheckFileExists Method ([SFTPClient](#sftpclient-component) Component)

Returns * True * if the file specified by [RemoteFile](#remotefile-property-sftpclient-component) exists on the remote server.

## Syntax

```text
public bool CheckFileExists();

Async Version
public async Task<bool> CheckFileExists();
public async Task<bool> CheckFileExists(CancellationToken cancellationToken);
```

## Remarks

This property returns *true* if the file exists on the remote server. It returns *false* if the file does not exist. You must specify the file you wish to check by setting the [RemoteFile](#remotefile-property-sftpclient-component) before calling this method.

If no session is in place, the value of this property will always be *false*.

# Config Method ([SFTPClient](#sftpclient-component) Component)

Sets or retrieves a configuration setting.

## Syntax

```text
public string Config(string configurationString);

Async Version
public async Task<string> Config(string configurationString);
public async Task<string> Config(string configurationString, CancellationToken cancellationToken);
```

## Remarks

Config is a generic method available in every component. It is used to set and retrieve [configuration settings](#config-settings-sftpclient-component) for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these *internal properties* is provided through the Config method.

To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a [configuration setting](#config-settings-sftpclient-component), you must call *Config("PROPERTY")*. The value will be returned as a string.

# Connect Method ([SFTPClient](#sftpclient-component) Component)

Connects to the Secure Shell (SSH) host.

## Syntax

```text
public void Connect();

Async Version
public async Task Connect();
public async Task Connect(CancellationToken cancellationToken);
```

## Remarks

By default, this method establishes a connection with the [SSHHost](#sshhost-property-sftpclient-component) and performs a full SSH login (equivalent to calling the [SSHLogon](#sshlogon-method-sftpclient-component) method with the current [SSHHost](#sshhost-property-sftpclient-component) and [SSHPort](#sshport-property-sftpclient-component)).

This behavior is controlled by the [ConnectAndLogin](#ConnectAndLogin) configuration setting, which defaults to *true*. When set to *false*, this method will only establish the TCP connection with the [SSHHost](#sshhost-property-sftpclient-component) without logging in. This may be useful in cases in which it is desirable to separate the connection and logon operations; for instance, confirming a host is available by first creating the connection. To complete the SSH login afterward, call [SSHLogon](#sshlogon-method-sftpclient-component) with the same [SSHHost](#sshhost-property-sftpclient-component) and [SSHPort](#sshport-property-sftpclient-component) that were used to connect.

# CopyRemoteData Method ([SFTPClient](#sftpclient-component) Component)

Copies a range of bytes from one remote file to another directly on the secure file transfer protocol (SFTP) server.

## Syntax

```text
public void CopyRemoteData(string destFile, long length, long writeOffset);

Async Version
public async Task CopyRemoteData(string destFile, long length, long writeOffset);
public async Task CopyRemoteData(string destFile, long length, long writeOffset, CancellationToken cancellationToken);
```

## Remarks

This method uses the *copy-data* extension to copy data from the remote file specified by [RemoteFile](#remotefile-property-sftpclient-component) to the destination file specified by *DestFile*. The server must support the *copy-data* extension.

Set [StartByte](#startbyte-property-sftpclient-component) to indicate where in the source file to start reading. The *Length* parameter indicates the number of bytes to read, and the *WriteOffset* parameter indicates where in the destination file to start writing.

[RemoteFile](#remotefile-property-sftpclient-component) may be an absolute path on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component). *DestFile* may also be absolute or relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

```csharp
sftp.RemoteFile = "/my/source/file.txt";
sftp.StartByte = 6;
sftp.CopyRemoteData("/my/destination/file.txt", 5, 14);
```

# CopyRemoteFile Method ([SFTPClient](#sftpclient-component) Component)

Copies a remote file directly on the secure file transfer protocol (SFTP) server.

## Syntax

```text
public void CopyRemoteFile(string destFile);

Async Version
public async Task CopyRemoteFile(string destFile);
public async Task CopyRemoteFile(string destFile, CancellationToken cancellationToken);
```

## Remarks

This method uses the *copy-file* extension to copy the remote file specified by [RemoteFile](#remotefile-property-sftpclient-component) to the destination file specified by *DestFile*. The server must support the *copy-file* extension.

[RemoteFile](#remotefile-property-sftpclient-component) may be an absolute path on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component). *DestFile* may also be absolute or relative to [RemotePath](#remotepath-property-sftpclient-component). [Overwrite](#overwrite-property-sftpclient-component) controls whether an existing destination file will be overwritten.

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

```csharp
sftp.Overwrite = true;
sftp.RemoteFile = "/my/source/file.txt";
sftp.CopyRemoteFile("/my/destination/file.txt");
```

# CreateFile Method ([SFTPClient](#sftpclient-component) Component)

Creates a file on the secure file transfer protocol (SFTP) server.

## Syntax

```text
public void CreateFile(string fileName);

Async Version
public async Task CreateFile(string fileName);
public async Task CreateFile(string fileName, CancellationToken cancellationToken);
```

## Remarks

This method creates an empty file on the server with the name specified by the *FileName* parameter.

To upload a file with content, use [Upload](#upload-method-sftpclient-component) instead.

# DecodePacket Method ([SFTPClient](#sftpclient-component) Component)

Decodes a hex-encoded Secure Shell (SSH) packet

## Syntax

```text
public byte[] DecodePacket(string encodedPacket);

Async Version
public async Task<byte[]> DecodePacket(string encodedPacket);
public async Task<byte[]> DecodePacket(string encodedPacket, CancellationToken cancellationToken);
```

## Remarks

This method is used to decode an SSH packet created by [EncodePacket](#encodepacket-method-sftpclient-component).

NOTE: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) event.

# DeleteFile Method ([SFTPClient](#sftpclient-component) Component)

Deletes a file specified by * FileName * from a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void DeleteFile(string fileName);

Async Version
public async Task DeleteFile(string fileName);
public async Task DeleteFile(string fileName, CancellationToken cancellationToken);
```

## Remarks

The remote file or directory specified by *FileName* is deleted. *FileName* is either an absolute path on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

# Disconnect Method ([SFTPClient](#sftpclient-component) Component)

Disconnects from the server without first logging off.

## Syntax

```text
public void Disconnect();

Async Version
public async Task Disconnect();
public async Task Disconnect(CancellationToken cancellationToken);
```

## Remarks

This method immediately disconnects from the server without first logging off.

In most cases, the [SSHLogoff](#sshlogoff-method-sftpclient-component) method should be used to log off and disconnect from the server. Call the Disconnect method in cases in which it is desirable to immediately disconnect without first logging off.

# DoEvents Method ([SFTPClient](#sftpclient-component) Component)

This method processes events from the internal message queue.

## Syntax

```text
public void DoEvents();

Async Version
public async Task DoEvents();
public async Task DoEvents(CancellationToken cancellationToken);
```

## Remarks

When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.

# Download Method ([SFTPClient](#sftpclient-component) Component)

Downloads a [RemoteFile](#remotefile-property-sftpclient-component) from a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void Download();

Async Version
public async Task Download();
public async Task Download(CancellationToken cancellationToken);
```

## Remarks

The remote file specified by [RemoteFile](#remotefile-property-sftpclient-component) is downloaded to the local file specified by [LocalFile](#localfile-property-sftpclient-component), or it is retrieved through the [Transfer](#transfer-event-sftpclient-component) event, if the [LocalFile](#localfile-property-sftpclient-component) property is "" (empty string). [RemoteFile](#remotefile-property-sftpclient-component) is either an absolute path on the server or is a path relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

**Example. Download a File:**

```text
SFTPControl.Localfile = "C:\localfile.txt"
SFTPControl.RemoteFile = "remotefile.txt"
SFTPControl.Download()

SFTPControl.Localfile = "C:\localfile2.txt"
SFTPControl.RemoteFile = "folder/remotefile2.txt"
SFTPControl.Download()
```

# DownloadRange Method ([SFTPClient](#sftpclient-component) Component)

Facilitates the partial downloading of a remote file from a secure file transfer protocol (SFTP) server.

## Syntax

```text
public int DownloadRange(string path, string fileName, long startByte, int count, byte[] buffer);

Async Version
public async Task<int> DownloadRange(string path, string fileName, long startByte, int count, byte[] buffer);
public async Task<int> DownloadRange(string path, string fileName, long startByte, int count, byte[] buffer, CancellationToken cancellationToken);
```

## Remarks

This method enables downloading a specific segment of a remote file specified by *Path* and *FileName*. *StartByte* is the offset (in bytes) relative to the beginning of the file from where to start reading, and *Count* is the number of bytes to read into the specified *Buffer*.

This functionality is particularly useful for efficient management of large files and targeted data retrieval within them.

NOTE: If the requested range extends beyond the end of the file, only the available bytes will be returned.

# EncodePacket Method ([SFTPClient](#sftpclient-component) Component)

Hex encodes a Secure Shell (SSH) packet.

## Syntax

```text
public string EncodePacket(byte[] packet);

Async Version
public async Task<string> EncodePacket(byte[] packet);
public async Task<string> EncodePacket(byte[] packet, CancellationToken cancellationToken);
```

## Remarks

This method is used to encode a raw SSH packet created by [SetSSHParam](#setsshparam-method-sftpclient-component).

NOTE: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) event.

# GetSSHParam Method ([SFTPClient](#sftpclient-component) Component)

Reads a field from a Secure Shell (SSH) packet's payload.

## Syntax

```text
public string GetSSHParam(byte[] payload, string field);

Async Version
public async Task<string> GetSSHParam(byte[] payload, string field);
public async Task<string> GetSSHParam(byte[] payload, string field, CancellationToken cancellationToken);
```

## Remarks

This method is used to read the value of a particular field from an SSH packet's payload. *Payload* should contain the full payload of a packet received by an event such as SSHChannelRequest. *Field* is the name of a field to be read out of the packet.

The following is a list of the names of well-known channel request field names and their encodings:

|  |  |
| --- | --- |
| ChannelId (int32) | The Id of the channel that received the packet. |
| RequestType (string) | The type of channel requested. |
| WantsReply (boolean) | Whether or not the client wants a reply to the request. |

The remaining fields that are available in the payload are dependent on the value of *RequestType*.

**pty-req**

Pty-req is a request to open a pseudo terminal on the specified channel. The following fields are available:

|  |  |
| --- | --- |
| TerminalType (string) | The type of terminal being requested (e.g., "vt100"). |
| TerminalWidthCharacters (int32) | The width, in characters, of the terminal to be opened. |
| TerminalHeightRows (int32) | The height, in rows, of the terminal to be opened. |
| TerminalWidthPixels (int32) | The width, in pixels, of the terminal to be opened. |
| TerminalHeightPixels (int32) | The height, in pixels, of the terminal to be opened. |
| TerminalModes (string) | A list of op-val (int32-byte) encoded modes to be used by the terminal. |

**x11-req**

X11-req is a request to forward x11 sessions over a channel. The following fields are available:

|  |  |
| --- | --- |
| SingleConnection (boolean) | Disallows more than one connection to be forwarded by the channel. |
| X11AuthProtocol (string) | The authentication protocol to be used (e.g., "MIT-MAGIC-COOKIE-1"). |
| X11AuthCookie (string) | A hexadecimal-encoded cookie to be used for authentication. |
| X11ScreenNumber (int32) | The x11 screen number to be used. |

**env**

Env is a request to set an environment variable to be passed into a shell that may be started later. The following fields are available:

|  |  |
| --- | --- |
| VariableName (string) | The name of the variable to be set. |
| VariableValue (string) | The value of the variable to be set. |

**exec**

Exec is a request to execute a command on the channel using the authenticated user's shell. The following field is available:

|  |  |
| --- | --- |
| Command (string) | The command to be executed. |

**subsystem**

Subsystem is a request to start a subsystem on the specified channel. The following field is available:

|  |  |
| --- | --- |
| Subsystem (string) | The name of the subsystem to be started (e.g., "sftp"). |

**xon-xoff**

Xon-xoff instructs the server to allow or disallow control-S/control-Q style flow control. The following field is available:

|  |  |
| --- | --- |
| ClientCanDo (boolean) | Whether or not the server should enable flow control. |

**signal**

Sends a signal to the remote process/service. The following field is available:

|  |  |
| --- | --- |
| SignalName (string) | The name of the signal to be sent. |

If the packet type is not well known, *Field* should start with the special character "%" and contain a comma-separated list of field types as defined in [SetSSHParam](#setsshparam-method-sftpclient-component). For example, reading out the X11AuthProtocol of an x11-req payload, you can use "%s,f".

NOTE: The return value is a string encoded the same way as the *FieldValue* param in [SetSSHParam](#setsshparam-method-sftpclient-component).

NOTE: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) event.

# GetSSHParamBytes Method ([SFTPClient](#sftpclient-component) Component)

Reads a field from a Secure Shell (SSH) packet's payload.

## Syntax

```text
public byte[] GetSSHParamBytes(byte[] payload, string field);

Async Version
public async Task<byte[]> GetSSHParamBytes(byte[] payload, string field);
public async Task<byte[]> GetSSHParamBytes(byte[] payload, string field, CancellationToken cancellationToken);
```

## Remarks

This method is the same as calling [GetSSHParam](#getsshparam-method-sftpclient-component), but it returns raw bytes instead of strings.

NOTE: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) event.

# Interrupt Method ([SFTPClient](#sftpclient-component) Component)

This method interrupts the current method.

## Syntax

```text
public void Interrupt();

Async Version
public async Task Interrupt();
public async Task Interrupt(CancellationToken cancellationToken);
```

## Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

# ListDirectory Method ([SFTPClient](#sftpclient-component) Component)

Lists the current directory specified by [RemotePath](#remotepath-property-sftpclient-component) on a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void ListDirectory();

Async Version
public async Task ListDirectory();
public async Task ListDirectory(CancellationToken cancellationToken);
```

## Remarks

A listing is requested for the directory (or file mask) specified in [RemoteFile](#remotefile-property-sftpclient-component). [RemoteFile](#remotefile-property-sftpclient-component) is either an absolute path on the server or is a path relative to [RemotePath](#remotepath-property-sftpclient-component). The file listing is received through the [DirList](#dirlist-event-sftpclient-component) event.

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

# MakeDirectory Method ([SFTPClient](#sftpclient-component) Component)

Creates a directory on a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void MakeDirectory(string newDir);

Async Version
public async Task MakeDirectory(string newDir);
public async Task MakeDirectory(string newDir, CancellationToken cancellationToken);
```

## Remarks

A directory with a path specified by *NewDir* is created on the SFTP server. *NewDir* is either an absolute path on the server or is a path relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

# QueryFileAttributes Method ([SFTPClient](#sftpclient-component) Component)

Queries the server for the attributes of [RemoteFile](#remotefile-property-sftpclient-component)

## Syntax

```text
public void QueryFileAttributes();

Async Version
public async Task QueryFileAttributes();
public async Task QueryFileAttributes(CancellationToken cancellationToken);
```

## Remarks

This method queries the server for attributes of [RemoteFile](#remotefile-property-sftpclient-component). After calling this method, [FileAttributes](#fileattributes-property-sftpclient-component) will be populated with the values returned by the server.

To update attributes, modify the desired values in [FileAttributes](#fileattributes-property-sftpclient-component) and call [UpdateFileAttributes](#updatefileattributes-method-sftpclient-component).

# QueueFile Method ([SFTPClient](#sftpclient-component) Component)

Adds a file to the transfer queue.

## Syntax

```text
public void QueueFile(string localFile, string remoteFile);

Async Version
public async Task QueueFile(string localFile, string remoteFile);
public async Task QueueFile(string localFile, string remoteFile, CancellationToken cancellationToken);
```

## Remarks

This method adds a file to the queue of files that will be transferred.

It is not required to use this method; however, this method extends the ability of the component to allow for multiple simultaneous file transfers.

To simply transfer a file without using this method, you need only to set [LocalFile](#localfile-property-sftpclient-component) and [RemoteFile](#remotefile-property-sftpclient-component) and to call [Upload](#upload-method-sftpclient-component) or [Download](#download-method-sftpclient-component), as appropriate. This method allows you to instead queue multiple files before beginning a transfer.

When a file is queued, it will not be transferred until the [Upload](#upload-method-sftpclient-component) or [Download](#download-method-sftpclient-component) method is called. If multiple files are queued, the files will be transferred simultaneously. The [SimultaneousTransferLimit](#SimultaneousTransferLimit) setting controls the maximum number of simultaneous transfers.

The [Upload](#upload-method-sftpclient-component) or [Download](#download-method-sftpclient-component) method will not return until the queue has been completely processed. This method may be called from within events to add additional files to the queue before processing is complete.

To clear the queue, call [ResetQueue](#resetqueue-method-sftpclient-component). This will not affect current transfers.

To cancel an individual file transfer, set the *Cancel* parameter of the [Transfer](#transfer-event-sftpclient-component) event to True. The rest of the queue will continue to process as normal.

The [Interrupt](#interrupt-method-sftpclient-component) method may be called to immediately stop all current transfers.

In the event of a file-specific error, the [Error](#error-event-sftpclient-component) event will fire and the *LocalFile* and *RemoteFile* event parameters can be used to identify the file to which the error applies.

# RemoveDirectory Method ([SFTPClient](#sftpclient-component) Component)

Removes a directory specified by * DirName * from a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void RemoveDirectory(string dirName);

Async Version
public async Task RemoveDirectory(string dirName);
public async Task RemoveDirectory(string dirName, CancellationToken cancellationToken);
```

## Remarks

A directory with a path specified by *DirName* is deleted on the SFTP server. *DirName* is either an absolute path on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

# RenameFile Method ([SFTPClient](#sftpclient-component) Component)

Changes the name of [RemoteFile](#remotefile-property-sftpclient-component) to * NewName * .

## Syntax

```text
public void RenameFile(string newName);

Async Version
public async Task RenameFile(string newName);
public async Task RenameFile(string newName, CancellationToken cancellationToken);
```

## Remarks

The name of the remote file or the folder specified by [RemoteFile](#remotefile-property-sftpclient-component) is changed to *NewName*. [RemoteFile](#remotefile-property-sftpclient-component) and *NewName* are either absolute paths on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

# Reset Method ([SFTPClient](#sftpclient-component) Component)

This method will reset the component.

## Syntax

```text
public void Reset();

Async Version
public async Task Reset();
public async Task Reset(CancellationToken cancellationToken);
```

## Remarks

This method will reset the component's properties to their default values.

# ResetQueue Method ([SFTPClient](#sftpclient-component) Component)

Resets the queue of files to be transferred.

## Syntax

```text
public void ResetQueue();

Async Version
public async Task ResetQueue();
public async Task ResetQueue(CancellationToken cancellationToken);
```

## Remarks

This method will remove all files from the transfer queue.

Calling this method will clear all files that were queued by [QueueFile](#queuefile-method-sftpclient-component). Calling this method will not affect current transfers.

# SetDownloadStream Method ([SFTPClient](#sftpclient-component) Component)

Sets the stream to which the downloaded data from the server will be written.

## Syntax

```text
public void SetDownloadStream(System.IO.Stream downloadStream);

Async Version
public async Task SetDownloadStream(System.IO.Stream downloadStream);
public async Task SetDownloadStream(System.IO.Stream downloadStream, CancellationToken cancellationToken);
```

## Remarks

If a download stream is set before the [Download](#download-method-sftpclient-component) method is called, the downloaded data will be written to the stream. The stream should be open and normally set to position *0*.

The component will automatically close this stream if [CloseStreamAfterTransfer](#CloseStreamAfterTransfer) is True (default). If the stream is closed, you will need to call SetDownloadStream again before calling [Download](#download-method-sftpclient-component) again.

The downloaded content will be written starting at the current position in the stream.

NOTE: SetDownloadStream and [LocalFile](#localfile-property-sftpclient-component) will reset the other.

# SetSSHParam Method ([SFTPClient](#sftpclient-component) Component)

Writes a field to the end of a payload.

## Syntax

```text
public byte[] SetSSHParam(byte[] payload, string fieldType, string fieldValue);

Async Version
public async Task<byte[]> SetSSHParam(byte[] payload, string fieldType, string fieldValue);
public async Task<byte[]> SetSSHParam(byte[] payload, string fieldType, string fieldValue, CancellationToken cancellationToken);
```

## Remarks

This method is used to build the payload portion of a Secure Shell (SSH) packet to be sent later by a call to SendSSHPacket. *Payload* should contain the result of a previous call to SetSSHParam. *FieldType* is a string defining the type of field to be written to the packet. *FieldValue* should be the string representation of the field to be written.

The following is a list of supported field types and a description of how *FieldValue* should be encoded:

|  |  |
| --- | --- |
| s | A plaintext string containing the default system encoding of the data. |
| sb | A string containing the hex-encoded data (e.g., "A1B23C") |
| m | A variable-length large integer, encoded as a textual representation of the value (e.g., "1234"). |
| i | A 32-bit integer, encoded as a textual representation of the value (e.g., "1234"). |
| l | A 64-bit integer, encoded as a textual representation of the value (e.g., "1234"). |
| b | A single byte, encoded as a textual representation of the value (e.g., "123"). |
| f | A boolean flag, encoded as a textual representation of the value (e.g., 'True' or 'False') |

NOTE: Integer values may be hexadecimal encoded by prefixing "0x" to the beginning of the string; otherwise, the value is assumed to be Base10.

NOTE: This method is applicable only for reading and creating Secure Shell (SSH) packets for use within the [SSHCustomAuth](#sshcustomauth-event-sftpclient-component) event.

# SetUploadStream Method ([SFTPClient](#sftpclient-component) Component)

Sets the stream from which the component will read data to upload to the server.

## Syntax

```text
public void SetUploadStream(System.IO.Stream uploadStream);

Async Version
public async Task SetUploadStream(System.IO.Stream uploadStream);
public async Task SetUploadStream(System.IO.Stream uploadStream, CancellationToken cancellationToken);
```

## Remarks

If an upload stream is set before the [Upload](#upload-method-sftpclient-component) method is called, the content of the stream will be read by the component and uploaded to the server. The stream should be open and normally set to position *0*. The component will automatically close this stream if [CloseStreamAfterTransfer](#CloseStreamAfterTransfer) is True (default). If the stream is closed, you will need to call SetUploadStream again before calling [Upload](#upload-method-sftpclient-component) again. The content of the stream will be read from the current position all the way to the end and no bytes will be skipped.

NOTE: SetUploadStream and [LocalFile](#localfile-property-sftpclient-component) will reset the other.

# SSHLogoff Method ([SFTPClient](#sftpclient-component) Component)

Logs off from the Secure Shell (SSH) server.

## Syntax

```text
public void SSHLogoff();

Async Version
public async Task SSHLogoff();
public async Task SSHLogoff(CancellationToken cancellationToken);
```

## Remarks

Logs off from the SSH server. If that fails, the connection is terminated by the local host.

# SSHLogon Method ([SFTPClient](#sftpclient-component) Component)

Logs on to the [SSHHost](#sshhost-property-sftpclient-component) using the current [SSHUser](#sshuser-property-sftpclient-component) and [SSHPassword](#sshpassword-property-sftpclient-component) .

## Syntax

```text
public void SSHLogon(string SSHHost, int SSHPort);

Async Version
public async Task SSHLogon(string SSHHost, int SSHPort);
public async Task SSHLogon(string SSHHost, int SSHPort, CancellationToken cancellationToken);
```

## Remarks

Logs on to the Secure Shell (SSH) server using the current [SSHUser](#sshuser-property-sftpclient-component) and [SSHPassword](#sshpassword-property-sftpclient-component). This will perform the SSH handshake and authentication.

**Example. Logging On:**

```text
SSHClient.SSHUser = "username"
SSHClient.SSHPassword = "password"
SSHClient.SSHLogon("sshHost", sshPort)
```

# UpdateFileAttributes Method ([SFTPClient](#sftpclient-component) Component)

Instructs the component to send the [FileAttributes](#fileattributes-property-sftpclient-component) to the server.

## Syntax

```text
public void UpdateFileAttributes();

Async Version
public async Task UpdateFileAttributes();
public async Task UpdateFileAttributes(CancellationToken cancellationToken);
```

## Remarks

When UpdateFileAttributes is called, the component will send the value of [FileAttributes](#fileattributes-property-sftpclient-component) to the server.

# Upload Method ([SFTPClient](#sftpclient-component) Component)

Uploads a file specified by [LocalFile](#localfile-property-sftpclient-component) to a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void Upload();

Async Version
public async Task Upload();
public async Task Upload(CancellationToken cancellationToken);
```

## Remarks

The local file specified by [LocalFile](#localfile-property-sftpclient-component) is uploaded to the remote file specified by [RemoteFile](#remotefile-property-sftpclient-component). [RemoteFile](#remotefile-property-sftpclient-component) is either an absolute path on the server or a path relative to [RemotePath](#remotepath-property-sftpclient-component).

If a Secure Shell (SSH) session is not in place, one is automatically created by the component first.

If you want to append to a server file, please refer to the [Append](#append-method-sftpclient-component) method.

**Example. Upload a File:**

```text
FTPControl.LocalFile = "C:\\localfile.txt"
FTPControl.RemoteFile = "remotefile.txt"
FTPControl.Upload()

FTPControl.LocalFile = "C:\\localfile2.txt"
FTPControl.RemoteFile = "folder/remotefile2.txt"
FTPControl.Upload()
```

# UploadRange Method ([SFTPClient](#sftpclient-component) Component)

Inserts data into a remote file on a secure file transfer protocol (SFTP) server.

## Syntax

```text
public void UploadRange(string path, string fileName, long startByte, int count, byte[] buffer);

Async Version
public async Task UploadRange(string path, string fileName, long startByte, int count, byte[] buffer);
public async Task UploadRange(string path, string fileName, long startByte, int count, byte[] buffer, CancellationToken cancellationToken);
```

## Remarks

This method enables uploading a buffer into the remote file specified by the *Path* and *FileName*. *Count* bytes will be updated from the provided *Buffer* starting in the remote file at the *StartByte* offset.

This functionality enables precise control over the insertion of data into a remote file, allowing for targeted modifications, overwriting, or additions starting from a specific position within the file.

NOTE: If the offset specified is beyond the file length, empty bytes will be created between the last file byte and the uploaded buffer.

# Connected Event ([SFTPClient](#sftpclient-component) Component)

Fired immediately after a connection completes (or fails).

## Syntax

```text
public event OnConnectedHandler OnConnected;

public delegate void OnConnectedHandler(object sender, SFTPClientConnectedEventArgs e);

public class SFTPClientConnectedEventArgs : EventArgs {
  public int StatusCode { get; }
  public string Description { get; }
}
```

## Remarks

If the connection is made normally, *StatusCode* is 0 and *Description* is "OK".

If the connection fails, *StatusCode* has the error code returned by the Transmission Control Protocol (TCP)/IP stack. *Description* contains a description of this code. The value of *StatusCode* is equal to the value of the error.

Please refer to the [Error Codes](#trappable-errors-sftpclient-component) section for more information.

# ConnectionStatus Event ([SFTPClient](#sftpclient-component) Component)

Fired to indicate changes in the connection state.

## Syntax

```text
public event OnConnectionStatusHandler OnConnectionStatus;

public delegate void OnConnectionStatusHandler(object sender, SFTPClientConnectionStatusEventArgs e);

public class SFTPClientConnectionStatusEventArgs : EventArgs {
  public string ConnectionEvent { get; }
  public int StatusCode { get; }
  public string Description { get; }
}
```

## Remarks

This event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The *ConnectionEvent* parameter indicates the type of connection event. Values may include the following:

|  |  |
| --- | --- |
|  | Firewall connection complete. |
|  | Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable). |
|  | Remote host connection complete. |
|  | Remote host disconnected. |
|  | SSL or S/Shell connection broken. |
|  | Firewall host disconnected. |

 *StatusCode* has the error code returned by the Transmission Control Protocol (TCP)/IP stack. *Description* contains a description of this code. The value of *StatusCode* is equal to the value of the error.

# DirList Event ([SFTPClient](#sftpclient-component) Component)

Fired when a directory entry is received.

## Syntax

```text
public event OnDirListHandler OnDirList;

public delegate void OnDirListHandler(object sender, SFTPClientDirListEventArgs e);

public class SFTPClientDirListEventArgs : EventArgs {
  public string DirEntry { get; }
  public string FileName { get; }
  public bool IsDir { get; }
  public long FileSize { get; }
  public string FileTime { get; }
  public bool IsSymlink { get; }
}
```

## Remarks

The DirList events are fired when a directory listing is received as a response to a [ListDirectory](#listdirectory-method-sftpclient-component).

The [StartTransfer](#starttransfer-event-sftpclient-component) and [EndTransfer](#endtransfer-event-sftpclient-component) events mark the beginning and end of the event stream.

The *DirEntry* parameter contains the filename when [ListDirectory](#listdirectory-method-sftpclient-component) is called.

The component tries to fill out the *FileName*, *IsDir*, *FileSize*, and *FileTime* parameters when calling the [ListDirectory](#listdirectory-method-sftpclient-component) method.

The format of the *FileTime* parameter returned by the component can be controlled through the [FileTimeFormat](#FileTimeFormat) configuration setting. If no format is specified, the component will format the date dependent on the year. If the filetime is in the same year, it will be formatted as "MMM dd HH:mm"; otherwise, it will be formatted as "MMM dd yyyy".

*IsSymlink* indicates whether the entry is a symbolic link. When the entry is a symbolic link, the value of *IsDir* will always be *False* because this information is not returned in the directory listing. To inspect a symlink to determine if it is a link to a file or a folder, set [RemoteFile](#remotefile-property-sftpclient-component) and query the [IsDir](#SFTPFileAttributes_f_IsDir) field.

# Disconnected Event ([SFTPClient](#sftpclient-component) Component)

Fired when a connection is closed.

## Syntax

```text
public event OnDisconnectedHandler OnDisconnected;

public delegate void OnDisconnectedHandler(object sender, SFTPClientDisconnectedEventArgs e);

public class SFTPClientDisconnectedEventArgs : EventArgs {
  public int StatusCode { get; }
  public string Description { get; }
}
```

## Remarks

If the connection is broken normally, *StatusCode* is 0 and *Description* is "OK".

If the connection is broken for any other reason, *StatusCode* has the error code returned by the Transmission Control Protocol (TCP/IP) subsystem. *Description* contains a description of this code. The value of *StatusCode* is equal to the value of the TCP/IP error.

Please refer to the [Error Codes](#trappable-errors-sftpclient-component) section for more information.

# EndTransfer Event ([SFTPClient](#sftpclient-component) Component)

Fired when a file completes downloading or uploading.

## Syntax

```text
public event OnEndTransferHandler OnEndTransfer;

public delegate void OnEndTransferHandler(object sender, SFTPClientEndTransferEventArgs e);

public class SFTPClientEndTransferEventArgs : EventArgs {
  public int Direction { get; }
  public string LocalFile { get; }
  public string RemoteFile { get; }
}
```

## Remarks

The EndTransfer event fires when either an upload or a download operation completes. This occurs when the file finishes transferring or a directory listing is finished.

The *Direction* parameter shows whether the client (0) or the server (1) is sending the data.

*LocalFile* identifies the local file. *RemoteFile* is the remote file.

# Error Event ([SFTPClient](#sftpclient-component) Component)

Fired when errors occur during data delivery.

## Syntax

```text
public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, SFTPClientErrorEventArgs e);

public class SFTPClientErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
  public string LocalFile { get; }
  public string RemoteFile { get; }
}
```

## Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception.

*ErrorCode* contains an error code and *Description* contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-sftpclient-component) section.

*LocalFile* identifies the local file. *RemoteFile* is the remote file.

# Log Event ([SFTPClient](#sftpclient-component) Component)

Fired once for each log message.

## Syntax

```text
public event OnLogHandler OnLog;

public delegate void OnLogHandler(object sender, SFTPClientLogEventArgs e);

public class SFTPClientLogEventArgs : EventArgs {
  public int LogLevel { get; }
  public string Message { get; }
  public string LogType { get; }
}
```

## Remarks

Fired once for each log message generated by the component. The verbosity is controlled by the [LogLevel](#LogLevel) setting.

*LogLevel* indicates the detail level of the message. Possible values are as follows:

|  |  |
| --- | --- |
| 0 (None) | No messages are logged. |
| 1 (Info - Default) | Informational events such as Secure Shell (SSH) handshake messages are logged. |
| 2 (Verbose) | Detailed data such as individual packet information are logged. |
| 3 (Debug) | Debug data including all relevant sent and received bytes are logged. |

*Message* is the log message.

*LogType* is reserved for future use.

# SSHCustomAuth Event ([SFTPClient](#sftpclient-component) Component)

Fired when the component is doing a custom authentication.

## Syntax

```text
public event OnSSHCustomAuthHandler OnSSHCustomAuth;

public delegate void OnSSHCustomAuthHandler(object sender, SFTPClientSSHCustomAuthEventArgs e);

public class SFTPClientSSHCustomAuthEventArgs : EventArgs {
  public string Packet { get; set; }
}
```

## Remarks

SSHCustomAuth is fired during the user authentication stage of the Secure Shell (SSH) logon process if [SSHAuthMode](#sshauthmode-property-sftpclient-component) is set to amCustom. *Packet* contains the last raw SSH packet sent by the server, in HEX-encoded format.

The client should create a new raw SSH packet to send to the server and set *Packet* to the HEX-encoded representation of the packet to send.

In all cases, *Packet* will start with the message type field.

To read the incoming packet, call [DecodePacket](#decodepacket-method-sftpclient-component) and then use the [GetSSHParam](#getsshparam-method-sftpclient-component) and [GetSSHParamBytes](#getsshparambytes-method-sftpclient-component) methods. To create a packet, use the [SetSSHParam](#setsshparam-method-sftpclient-component) method and then call [EncodePacket](#encodepacket-method-sftpclient-component) to obtain a HEX-encoded value and assign this to the *Packet* parameter.

# SSHKeyboardInteractive Event ([SFTPClient](#sftpclient-component) Component)

Fired when the component receives a request for user input from the server.

## Syntax

```text
public event OnSSHKeyboardInteractiveHandler OnSSHKeyboardInteractive;

public delegate void OnSSHKeyboardInteractiveHandler(object sender, SFTPClientSSHKeyboardInteractiveEventArgs e);

public class SFTPClientSSHKeyboardInteractiveEventArgs : EventArgs {
  public string Name { get; }
  public string Instructions { get; }
  public string Prompt { get; }
  public string Response { get; set; }
  public bool EchoResponse { get; }
}
```

## Remarks

SSHKeyboardInteractive is fired during the user authentication stage of the Secure Shell (SSH) logon process. During authentication, the component will request a list of available authentication methods for the [SSHUser](#sshuser-property-sftpclient-component). For example, if the [SSHHost](#sshhost-property-sftpclient-component) responds with "keyboard-interactive", the component will fire this event to allow the client application to set the password.

During authentication, the SSH server may respond with a request for the user's authentication information. *Name* is a server-provided value associated with the authentication method such as "CRYPTOCard Authentication". *Instructions* will contain specific instructions, also supplied by the server, for how the user should respond.

Along with these values, the server will also send at least one input *Prompt* to be displayed to and filled out by the user. *Response* should be set to the user's input, and will be sent back in the user authentication information response. *EchoResponse* is a server recommendation for whether or not the user's response should be echoed back during input.

NOTE: The server may send several prompts in a single packet. The component will fire the SSHKeyboardInteractive event once for each prompt.

# SSHServerAuthentication Event ([SFTPClient](#sftpclient-component) Component)

Fired after the server presents its public key to the client.

## Syntax

```text
public event OnSSHServerAuthenticationHandler OnSSHServerAuthentication;

public delegate void OnSSHServerAuthenticationHandler(object sender, SFTPClientSSHServerAuthenticationEventArgs e);

public class SFTPClientSSHServerAuthenticationEventArgs : EventArgs {
  public string HostKey { get; }  public byte[] HostKeyB { get; }
  public string Fingerprint { get; }
  public string KeyAlgorithm { get; }
  public string CertSubject { get; }
  public string CertIssuer { get; }
  public string Status { get; }
  public bool Accept { get; set; }
}
```

## Remarks

This event is fired when the client can decide whether or not to continue with the connection process. If the public key is known to be a valid key for the Secure Shell (SSH) server, *Accept* should be set to True within the event. Otherwise, the server will not be authenticated and the connection will be broken.

*Accept* will be True only if either *HostKey* or *Fingerprint* is identical to the value of [SSHAcceptServerHostKey](#sshacceptserverhostkey-property-sftpclient-component).

Accept may be set to True manually to accept the server host key.

NOTE: SSH's security inherently relies on client verification of the host key. Ignoring the host key and always setting *Accept* to True is strongly discouraged, and could cause potentially serious security vulnerabilities in your application. It is recommended that clients maintain a list of known keys for each server and check *HostKey* against this list each time a connection is attempted.

**Host Key** contains the full binary text of the key, in the same format used internally by SSH.

*Fingerprint* holds the SHA-256 hash of *HostKey* in the hex-encoded form: *0a:1b:2c:3d*. To configure the hash algorithm used to calculate this value, see [SSHFingerprintHashAlgorithm](#SSHFingerprintHashAlgorithm). To configure the encoding format used when displaying this value, see [SSHFingerprintEncoding](#SSHFingerprintEncoding).

*KeyAlgorithm* identifies the host key algorithm. The following values are supported:

- ssh-rsa
- ssh-dss
- rsa-sha2-256
- rsa-sha2-512
- x509v3-sign-rsa
- x509v3-sign-dss
- ecdsa-sha2-nistp256
- ecdsa-sha2-nistp384
- ecdsa-sha2-nistp521

 To limit the accepted host key algorithms, refer to [SSHPublicKeyAlgorithms](#SSHPublicKeyAlgorithms).

*CertSubject* is the subject of the certificate. This is applicable only when *KeyAlgorithm* is "x509v3-sign-rsa" or "x509v3-sign-dss".

*CertIssuer* is the issuer of the certificate. This is applicable only when *KeyAlgorithm* is "x509v3-sign-rsa" or "x509v3-sign-dss".

*Status* is reserved for future use.

# SSHStatus Event ([SFTPClient](#sftpclient-component) Component)

Fired to track the progress of the secure connection.

## Syntax

```text
public event OnSSHStatusHandler OnSSHStatus;

public delegate void OnSSHStatusHandler(object sender, SFTPClientSSHStatusEventArgs e);

public class SFTPClientSSHStatusEventArgs : EventArgs {
  public string Message { get; }
}
```

## Remarks

The event is fired for informational and logging purposes only. Used to track the progress of the connection.

# StartTransfer Event ([SFTPClient](#sftpclient-component) Component)

Fired when a file starts downloading or uploading.

## Syntax

```text
public event OnStartTransferHandler OnStartTransfer;

public delegate void OnStartTransferHandler(object sender, SFTPClientStartTransferEventArgs e);

public class SFTPClientStartTransferEventArgs : EventArgs {
  public int Direction { get; }
  public string LocalFile { get; }
  public string RemoteFile { get; }
}
```

## Remarks

The StartTransfer event fires when a data interface connection is created. This occurs when the file starts transferring or a directory listing is started.

The *Direction* parameter shows whether the client (0) or the server (1) is sending the data.

*LocalFile* identifies the local file. *RemoteFile* is the remote file.

# Transfer Event ([SFTPClient](#sftpclient-component) Component)

Fired during file download or upload.

## Syntax

```text
public event OnTransferHandler OnTransfer;

public delegate void OnTransferHandler(object sender, SFTPClientTransferEventArgs e);

public class SFTPClientTransferEventArgs : EventArgs {
  public int Direction { get; }
  public string LocalFile { get; }
  public string RemoteFile { get; }
  public long BytesTransferred { get; }
  public int PercentDone { get; }
  public string Text { get; }  public byte[] TextB { get; }
  public bool Cancel { get; set; }
}
```

## Remarks

One or more Transfer events are fired during file transfer. The *BytesTransferred* parameter shows the number of bytes transferred since the beginning of the transfer.

*Text* contains the portion of the file data being delivered.

The *Direction* parameter shows whether the client (0) or the server (1) is sending the data.

*LocalFile* identifies the local file. *RemoteFile* is the remote file.

The *PercentDone* parameter shows the progress of the transfer in the corresponding direction. If *PercentDone* can not be calculated the value will be -1.

To cancel the current transfer, set *Cancel* to True.

# Certificate Type

This is the digital certificate being used.

## Remarks

This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.

The following fields are available:

- [EffectiveDate](#Certificate_f_EffectiveDate)

- [ExpirationDate](#Certificate_f_ExpirationDate)

- [ExtendedKeyUsage](#Certificate_f_ExtendedKeyUsage)

- [Fingerprint](#Certificate_f_Fingerprint)

- [FingerprintSHA1](#Certificate_f_FingerprintSHA1)

- [FingerprintSHA256](#Certificate_f_FingerprintSHA256)

- [Issuer](#Certificate_f_Issuer)

- [PrivateKey](#Certificate_f_PrivateKey)

- [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable)

- [PrivateKeyContainer](#Certificate_f_PrivateKeyContainer)

- [PublicKey](#Certificate_f_PublicKey)

- [PublicKeyAlgorithm](#Certificate_f_PublicKeyAlgorithm)

- [PublicKeyLength](#Certificate_f_PublicKeyLength)

- [SerialNumber](#Certificate_f_SerialNumber)

- [SignatureAlgorithm](#Certificate_f_SignatureAlgorithm)

- [Store](#Certificate_f_Store)

- [StorePassword](#Certificate_f_StorePassword)

- [StoreType](#Certificate_f_StoreType)

- [SubjectAltNames](#Certificate_f_SubjectAltNames)

- [ThumbprintMD5](#Certificate_f_ThumbprintMD5)

- [ThumbprintSHA1](#Certificate_f_ThumbprintSHA1)

- [ThumbprintSHA256](#Certificate_f_ThumbprintSHA256)

- [Usage](#Certificate_f_Usage)

- [UsageFlags](#Certificate_f_UsageFlags)

- [Version](#Certificate_f_Version)

- [Subject](#Certificate_f_Subject)

- [Encoded](#Certificate_f_Encoded)

## Fields

 **EffectiveDate** *string (read-only)*
Default: ""

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

 **ExpirationDate** *string (read-only)*
Default: ""

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

 **ExtendedKeyUsage** *string (read-only)*
Default: ""

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

 **Fingerprint** *string (read-only)*
Default: ""

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02*

 **FingerprintSHA1** *string (read-only)*
Default: ""

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84*

 **FingerprintSHA256** *string (read-only)*
Default: ""

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53*

 **Issuer** *string (read-only)*
Default: ""

The issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate.

 **PrivateKey** *string (read-only)*
Default: ""

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The [PrivateKey](#Certificate_f_PrivateKey) may be available but not exportable. In this case, [PrivateKey](#Certificate_f_PrivateKey) returns an empty string.

 **PrivateKeyAvailable** *bool (read-only)*
Default: False

Whether a [PrivateKey](#Certificate_f_PrivateKey) is available for the selected certificate. If [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) is True, the certificate may be used for authentication purposes (e.g., server authentication).

 **PrivateKeyContainer** *string (read-only)*
Default: ""

The name of the [PrivateKey](#Certificate_f_PrivateKey) container for the certificate (if available). This functionality is available only on Windows platforms.

 **PublicKey** *string (read-only)*
Default: ""

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

 **PublicKeyAlgorithm** *string (read-only)*
Default: ""

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

 **PublicKeyLength** *int (read-only)*
Default: 0

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

 **SerialNumber** *string (read-only)*
Default: ""

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

 **SignatureAlgorithm** *string (read-only)*
Default: ""

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

 **Store** *string*
Default: "MY"

The name of the certificate store for the client certificate.

The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword).

[Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details.

 Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

|  |  |
| --- | --- |
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |

When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

 **StoreB** *byte []*
Default: "MY"

The name of the certificate store for the client certificate.

The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword).

[Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details.

 Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

|  |  |
| --- | --- |
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |

When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

 **StorePassword** *string*
Default: ""

If the type of certificate store requires a password, this field is used to specify the password needed to open the certificate store.

 **StoreType** *CertStoreTypes*
Default: 0

The type of certificate store for this certificate.

 The component supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the component will automatically determine the type. This field can take one of the following values:

```csharp
sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11,
                               @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll",
                               "123456", // PIN
                               "CN=cert_subject");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

```csharp
certmgr.CertStoreType = CertStoreTypes.cstPKCS11;
certmgr.OnCertList += (s, e) => {
  secKeyBlob = e.CertEncoded;
};
certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll";
certmgr.CertStorePassword = "123456"; // PIN
certmgr.ListStoreCertificates();

sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

|  |  |
| --- | --- |
| 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. |
| 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. |
| 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
| 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
| 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. |
| 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. |
| 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
| 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
| 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
| 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
| 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
| 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
| 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
| 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
| 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
| 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
| 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
| 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. |
| 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. |
| 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#certificate-type) object and pass cstPKCS11 as the [StoreType](#Certificate_f_StoreType), the full path of the PKCS#11 DLL as the [Store](#Certificate_f_Store), and the PIN as the [StorePassword](#Certificate_f_StorePassword). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](CertMgr.md#CertMgr) component by calling the [ListStoreCertificates](CertMgr.md#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [CertList](CertMgr.md#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [Store](#Certificate_f_Store) and set [StorePassword](#Certificate_f_StorePassword) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): |
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |

 **SubjectAltNames** *string (read-only)*
Default: ""

Comma-separated lists of alternative subject names for the certificate.

 **ThumbprintMD5** *string (read-only)*
Default: ""

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

 **ThumbprintSHA1** *string (read-only)*
Default: ""

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

 **ThumbprintSHA256** *string (read-only)*
Default: ""

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

 **Usage** *string (read-only)*
Default: ""

The text description of [UsageFlags](#Certificate_f_UsageFlags).

This value will be one or more of the following strings and will be separated by commas:

- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

 **UsageFlags** *int (read-only)*
Default: 0

The flags that show intended use for the certificate. The value of [UsageFlags](#Certificate_f_UsageFlags) is a combination of the following flags:

|  |  |
| --- | --- |
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |

Please see the [Usage](#Certificate_f_Usage) field for a text representation of [UsageFlags](#Certificate_f_UsageFlags).

This functionality currently is not available when the provider is OpenSSL.

 **Version** *string (read-only)*
Default: ""

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

 **Subject** *string*
Default: ""

The subject of the certificate used for client authentication.

This field will be populated with the full subject of the loaded certificate. When loading a certificate, the subject is used to locate the certificate in the store.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows:

| Field | Meaning |
| --- | --- |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |

If a field value contains a comma, it must be quoted.

 **Encoded** *string*
Default: ""

The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate.

When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string.

 **EncodedB** *byte []*
Default: ""

The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate.

When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string.

## Constructors

```text
public Certificate();
```

 Creates a instance whose properties can be set.

```text
public Certificate(string certificateFile);
```

 Opens * CertificateFile * and reads out the contents as an X.509 public key.

```text
public Certificate(byte[] encoded);
```

 Parses * Encoded * as an X.509 public key.

```text
public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject);
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store.

 After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.

```text
public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject, string configurationString);
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store.

 * ConfigurationString * is a newline-separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CryptoAPI option. The default value is True (the key is persisted). "Thumbprint" - an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to the * cstUser * , * cstMachine * , * cstPublicKeyFile * , and * cstPFXFile * store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations.

 After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.

```text
public Certificate(CertStoreTypes storeType, string store, string storePassword, byte[] encoded);
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store.

 After the store has been successfully opened, the component will load * Encoded * as an X.509 certificate and search the opened store for a corresponding private key.

```text
public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject);
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store.

 After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.

```text
public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject, string configurationString);
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store.

 After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.

```text
public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, byte[] encoded);
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store.

 After the store has been successfully opened, the component will load * Encoded * as an X.509 certificate and search the opened store for a corresponding private key.

# DirEntry Type

This is a listing in a directory returned from the server.

## Remarks

The DirEntry listings are filled out by the component when a directory listing is received as a response to a ListDirectory or ListDirectoryLong call. The server returns a listing for each directory and file at the current path that exists. This listing is parsed into a directory entry.

If ListDirectoryLong is called, all of the fields listed below are supplied by the server. When the ListDirectory method is called, however, the [FileSize](#DirEntry_f_FileSize), [FileTime](#DirEntry_f_FileTime), and [IsDir](#DirEntry_f_IsDir) fields all are left empty by the server. In this case, the only field it returns is the [FileName](#DirEntry_f_FileName).

The full line for the directory entry is provided by the [Entry](#DirEntry_f_Entry) field.

The following fields are available:

- [Entry](#DirEntry_f_Entry)

- [FileName](#DirEntry_f_FileName)

- [FileSize](#DirEntry_f_FileSize)

- [FileTime](#DirEntry_f_FileTime)

- [IsDir](#DirEntry_f_IsDir)

- [IsSymlink](#DirEntry_f_IsSymlink)

## Fields

 **Entry** *string (read-only)*
Default: ""

This field contains the raw entry as received from the server. It is the complete unparsed entry in the directory listing.

 **FileName** *string (read-only)*
Default: ""

This field shows the file name in the last directory listing. This also may be the directory name if a directory is being listed. You can tell whether it is a file or a directory by the Boolean [IsDir](#DirEntry_f_IsDir) field.

 **FileSize** *long (read-only)*
Default: 0

This field shows the file size in the last directory listing.

 **FileTime** *string (read-only)*
Default: ""

This field shows the file time in the last directory listing. This contains the date/time stamp in which the file was created.

NOTE: In Unix systems, the date is given in two types of formats: If the date is in the past 12 months, the exact time is specified and the year is omitted. Otherwise, only the date and the year, but not hours or minutes, are given.

 **IsDir** *bool (read-only)*
Default: False

This field specifies whether entries in the last directory listing are directories. This Boolean value denotes whether or not the directory entry listed in [FileName](#DirEntry_f_FileName) is a file or a directory.

 **IsSymlink** *bool (read-only)*
Default: False

This field indicates whether the entry is a symbolic link. When the entry is a symbolic link, the value of [IsDir](#DirEntry_f_IsDir) will always be *False* because this information is not returned in the directory listing. To inspect a symlink to determine if it is a link to a file or a folder, set RemoteFile and query the FileAttributes.[IsDir](#DirEntry_f_IsDir) field.

## Constructors

```text
public DirEntry();
```

# Firewall Type

The firewall the component will connect through.

## Remarks

When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall [Host](#Firewall_f_Host) and the [FirewallType](#Firewall_f_FirewallType).

The following fields are available:

- [AutoDetect](#Firewall_f_AutoDetect)

- [FirewallType](#Firewall_f_FirewallType)

- [Host](#Firewall_f_Host)

- [Password](#Firewall_f_Password)

- [Port](#Firewall_f_Port)

- [User](#Firewall_f_User)

## Fields

 **AutoDetect** *bool*
Default: False

Whether to automatically detect and use firewall system settings, if available.

 **FirewallType** *FirewallTypes*
Default: 0

The type of firewall to connect through. The applicable values are as follows:

|  |  |
| --- | --- |
| fwNone (0) | No firewall (default setting). |
| fwTunnel (1) | Connect through a tunneling proxy. [Port](#Firewall_f_Port) is set to 80. |
| fwSOCKS4 (2) | Connect through a SOCKS4 Proxy. [Port](#Firewall_f_Port) is set to 1080. |
| fwSOCKS5 (3) | Connect through a SOCKS5 Proxy. [Port](#Firewall_f_Port) is set to 1080. |
| fwSOCKS4A (10) | Connect through a SOCKS4A Proxy. [Port](#Firewall_f_Port) is set to 1080. |

 **Host** *string*
Default: ""

The name or IP address of the firewall (optional). If a [Host](#Firewall_f_Host) is given, the requested connections will be authenticated through the specified firewall when connecting.

If this field is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this field is set to the corresponding address. If the search is not successful, the component throws an exception.

 **Password** *string*
Default: ""

A password if authentication is to be used when connecting through the firewall. If [Host](#Firewall_f_Host) is specified, the [User](#Firewall_f_User) and [Password](#Firewall_f_Password) fields are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception.

 **Port** *int*
Default: 0

The Transmission Control Protocol (TCP) port for the firewall [Host](#Firewall_f_Host). See the description of the [Host](#Firewall_f_Host) field for details.

NOTE: This field is set automatically when [FirewallType](#Firewall_f_FirewallType) is set to a valid value. See the description of the [FirewallType](#Firewall_f_FirewallType) field for details.

 **User** *string*
Default: ""

A username if authentication is to be used when connecting through a firewall. If [Host](#Firewall_f_Host) is specified, this field and the [Password](#Firewall_f_Password) field are used to connect and authenticate to the given [Firewall](#firewall-type). If the authentication fails, the component throws an exception.

## Constructors

```text
public Firewall();
```

# SFTPFileAttributes Type

Includes a set of attributes for a file existing on an secure file transfer protocol (SFTP) server.

## Remarks

This type describes a file residing on an SFTP server.

The following fields are available:

- [AccessTime](#SFTPFileAttributes_f_AccessTime)

- [AccessTimeNanos](#SFTPFileAttributes_f_AccessTimeNanos)

- [ACL](#SFTPFileAttributes_f_ACL)

- [AllocationSize](#SFTPFileAttributes_f_AllocationSize)

- [AttributeBits](#SFTPFileAttributes_f_AttributeBits)

- [AttributeBitsValid](#SFTPFileAttributes_f_AttributeBitsValid)

- [CreationTime](#SFTPFileAttributes_f_CreationTime)

- [CreationTimeNanos](#SFTPFileAttributes_f_CreationTimeNanos)

- [FileType](#SFTPFileAttributes_f_FileType)

- [Flags](#SFTPFileAttributes_f_Flags)

- [GroupId](#SFTPFileAttributes_f_GroupId)

- [IsDir](#SFTPFileAttributes_f_IsDir)

- [IsSymlink](#SFTPFileAttributes_f_IsSymlink)

- [LinkCount](#SFTPFileAttributes_f_LinkCount)

- [MIMEType](#SFTPFileAttributes_f_MIMEType)

- [ModifiedTime](#SFTPFileAttributes_f_ModifiedTime)

- [ModifiedTimeNanos](#SFTPFileAttributes_f_ModifiedTimeNanos)

- [OwnerId](#SFTPFileAttributes_f_OwnerId)

- [Permissions](#SFTPFileAttributes_f_Permissions)

- [PermissionsOctal](#SFTPFileAttributes_f_PermissionsOctal)

- [Size](#SFTPFileAttributes_f_Size)

- [TextHint](#SFTPFileAttributes_f_TextHint)

- [UntranslatedName](#SFTPFileAttributes_f_UntranslatedName)

## Fields

 **AccessTime** *long*
Default: 0

Contains the number of milliseconds since 12:00:00 AM, January 1, 1970, when this file was last accessed.

 **AccessTimeNanos** *int*
Default: 0

Contains a subsecond value associated with this file's [AccessTime](#SFTPFileAttributes_f_AccessTime).

 **ACL** *string*
Default: ""

Contains a string containing an access control list (ACL).

 **AllocationSize** *long (read-only)*
Default: 0

Specifies the size, in bytes, that this file consumes on disk.

 **AttributeBits** *int (read-only)*
Default: 0

[AttributeBits](#SFTPFileAttributes_f_AttributeBits) and [AttributeBitsValid](#SFTPFileAttributes_f_AttributeBitsValid) each contain a bitmask representing attributes of the file on the secure file transfer protocol (SFTP) server. These two values must be interpreted together. Any value present in [AttributeBitsValid](#SFTPFileAttributes_f_AttributeBitsValid) must be ignored in [AttributeBits](#SFTPFileAttributes_f_AttributeBits). This is done so that the server and client can communicate the attributes they know about without confusing any bits they do not understand.

This field can have one or more of the following values ORed together:

- 0x00000001 (SSH_FILEXFER_ATTR_FLAGS_READONLY)
- 0x00000002 (SSH_FILEXFER_ATTR_FLAGS_SYSTEM)
- 0x00000004 (SSH_FILEXFER_ATTR_FLAGS_HIDDEN)
- 0x00000008 (SSH_FILEXFER_ATTR_FLAGS_CASE_INSENSITIVE)
- 0x00000010 (SSH_FILEXFER_ATTR_FLAGS_ARCHIVE)
- 0x00000020 (SSH_FILEXFER_ATTR_FLAGS_ENCRYPTED)
- 0x00000040 (SSH_FILEXFER_ATTR_FLAGS_COMPRESSED)
- 0x00000080 (SSH_FILEXFER_ATTR_FLAGS_SPARSE)
- 0x00000100 (SSH_FILEXFER_ATTR_FLAGS_APPEND_ONLY)
- 0x00000200 (SSH_FILEXFER_ATTR_FLAGS_IMMUTABLE)
- 0x00000400 (SSH_FILEXFER_ATTR_FLAGS_SYNC)
- 0x00000800 (SSH_FILEXFER_ATTR_FLAGS_TRANSLATION_ERR)

 **AttributeBitsValid** *int (read-only)*
Default: 0

[AttributeBits](#SFTPFileAttributes_f_AttributeBits) and [AttributeBitsValid](#SFTPFileAttributes_f_AttributeBitsValid) each contain a bitmask representing attributes of the file on the secure file transfer protocol (SFTP) server. These two values must be interpreted together. Any value present in [AttributeBitsValid](#SFTPFileAttributes_f_AttributeBitsValid) must be ignored in [AttributeBits](#SFTPFileAttributes_f_AttributeBits). This is done so that the server and client can communicate the attributes they know about without confusing any bits they do not understand.

This field can have one or more of the following values ORed together:

- 0x00000001 (SSH_FILEXFER_ATTR_FLAGS_READONLY)
- 0x00000002 (SSH_FILEXFER_ATTR_FLAGS_SYSTEM)
- 0x00000004 (SSH_FILEXFER_ATTR_FLAGS_HIDDEN)
- 0x00000008 (SSH_FILEXFER_ATTR_FLAGS_CASE_INSENSITIVE)
- 0x00000010 (SSH_FILEXFER_ATTR_FLAGS_ARCHIVE)
- 0x00000020 (SSH_FILEXFER_ATTR_FLAGS_ENCRYPTED)
- 0x00000040 (SSH_FILEXFER_ATTR_FLAGS_COMPRESSED)
- 0x00000080 (SSH_FILEXFER_ATTR_FLAGS_SPARSE)
- 0x00000100 (SSH_FILEXFER_ATTR_FLAGS_APPEND_ONLY)
- 0x00000200 (SSH_FILEXFER_ATTR_FLAGS_IMMUTABLE)
- 0x00000400 (SSH_FILEXFER_ATTR_FLAGS_SYNC)
- 0x00000800 (SSH_FILEXFER_ATTR_FLAGS_TRANSLATION_ERR)

 **CreationTime** *long*
Default: 0

Specifies the number of milliseconds since 12:00:00 AM, January 1, 1970, when this file was created.

 **CreationTimeNanos** *int*
Default: 0

Contains a subsecond value associated with this file's [CreationTime](#SFTPFileAttributes_f_CreationTime).

 **FileType** *SFTPFileTypes (read-only)*
Default: 0

The type of file. [FileType](#SFTPFileAttributes_f_FileType) may be one of the following values:

|  |  |
| --- | --- |
| 1 (sftRegular - default) | A normal file. |
| 2 (sftDirectory) | A directory. |
| 3 (symlink) | The file is a Unix symbolic link. |
| 4 (sftSpecial) | The file type is a special system file. |
| 5 (sftUnknown) | The file type is unknown. |
| 6 (sftSocket) | The file handle is a socket handle. |
| 7 (sftCharDevice) | The file handle is a character input device. |
| 8 (sftBlockDevice) | The file handle is a block input device. |
| 9 (sftpFIFO) | The file handle is a buffering input device. |

 **Flags** *int*
Default: 0

[Flags](#SFTPFileAttributes_f_Flags) is an integer containing a bitmask that indicates which fields are valid. When retrieving file attributes from an secure file transfer protocol (SFTP) server, this field indicates which values were read by the component. When setting values, the field is used to determine which values get passed to the server.

[Flags](#SFTPFileAttributes_f_Flags) may be bitwise-ORed with any of the following values:

|  |  |
| --- | --- |
| 0x00000001 (SSH_FILEXFER_ATTR_SIZE) | [Size](#SFTPFileAttributes_f_Size) is valid. |
| 0x00000002 (SSH_FILXFER_ATTR_UIDGID) | [OwnerId](#SFTPFileAttributes_f_OwnerId) and [GroupId](#SFTPFileAttributes_f_GroupId) are valid. NOTE: this attribute is only valid when using SFTP protocol version 3. |
| 0x00000004 (SSH_FILEXFER_ATTR_PERMISSIONS) | [Permissions](#SFTPFileAttributes_f_Permissions) is valid. |
| 0x00000008 (SSH_FILEXFER_ATTR_ACCESSTIME) | [AccessTime](#SFTPFileAttributes_f_AccessTime) is valid. NOTE: For protocol version 3, this also denotes that [ModifiedTime](#SFTPFileAttributes_f_ModifiedTime) is valid. |
| 0x00000010 (SSH_FILEXFER_ATTR_CREATETIME) | [CreationTime](#SFTPFileAttributes_f_CreationTime) is valid. NOTE: This attribute is valid only when using SFTP protocol version 4 and above. |
| 0x00000020 (SSH_FILEXFER_ATTR_MODIFYTIME) | [ModifiedTime](#SFTPFileAttributes_f_ModifiedTime) is valid. NOTE: This attribute is valid only when using SFTP protocol version 4 and above. |
| 0x00000040 (SSH_FILEXFER_ATTR_ACL) | [ACL](#SFTPFileAttributes_f_ACL) is valid. NOTE: This attribute is valid only when using SFTP protocol version 4 and above. |
| 0x00000080 (SSH_FILEXFER_ATTR_OWNERGROUP) | [OwnerId](#SFTPFileAttributes_f_OwnerId) and [GroupId](#SFTPFileAttributes_f_GroupId) are valid. NOTE: This attribute is valid only when using SFTP protocol version 4 and above. |
| 0x00000100 (SSH_FILEXFER_ATTR_SUBSECOND_TIMES) | [AccessTimeNanos](#SFTPFileAttributes_f_AccessTimeNanos), [CreationTimeNanos](#SFTPFileAttributes_f_CreationTimeNanos) and [ModifiedTimeNanos](#SFTPFileAttributes_f_ModifiedTimeNanos) are valid. NOTE: This attribute is valid only when using SFTP protocol version 4 and above. |
| 0x00000200 (SSH_FILEXFER_ATTR_BITS) | [AttributeBits](#SFTPFileAttributes_f_AttributeBits) is valid. NOTE: This attribute is valid only when using SFTP protocol version 5 and above. When using SFTP protocol version 6 and above, this also indicates that [AttributeBitsValid](#SFTPFileAttributes_f_AttributeBitsValid) is valid. |
| 0x00000400 (SSH_FILEXFER_ATTR_ALLOCATION_SIZE) | [AllocationSize](#SFTPFileAttributes_f_AllocationSize) is valid. NOTE: This attribute is valid only when using SFTP protocol version 6 and above. |
| 0x00000800 (SSH_FILEXFER_ATTR_TEXT_HINT) | [TextHint](#SFTPFileAttributes_f_TextHint) is valid. NOTE: This attribute is valid only when using SFTP protocol version 6 and above. |
| 0x00001000 (SSH_FILEXFER_ATTR_MIME_TYPE) | [MIMEType](#SFTPFileAttributes_f_MIMEType) is valid. NOTE: This attribute is valid only when using SFTP protocol version 6 and above. |
| 0x00002000 (SSH_FILEXFER_ATTR_LINK_COUNT) | [LinkCount](#SFTPFileAttributes_f_LinkCount) is valid. NOTE: This attribute is valid only when using SFTP protocol version 6 and above. |
| 0x00004000 (SSH_FILEXFER_ATTR_UNTRANSLATED_NAME) | [UntranslatedName](#SFTPFileAttributes_f_UntranslatedName) is valid. NOTE: This attribute is valid only when using SFTP protocol version 6 and above. |
| 0x80000000 (SSH_FILEXFER_ATTR_EXTENDED) | Extended (vendor-specific) values are associated with the file. This attribute is currently ignored by the component. |

 **GroupId** *string*
Default: ""

Specifies the Id of the group that has access rights this file.

 **IsDir** *bool (read-only)*
Default: False

Specifies whether or not the file represented by these attributes is a directory.

 **IsSymlink** *bool (read-only)*
Default: False

Specifies whether or not the file or directory represented by these attributes is a symbolic link. This setting is applicable only when GetSymlinkAttrs is set to *True*. By default, the attributes of the actual file referred to by the link (not the symbolic link) are returned and this field will always be *False*.

 **LinkCount** *int (read-only)*
Default: 0

Includes the number of links that reference this file.

 **MIMEType** *string*
Default: ""

Specifies a value that can be used in the Content-Type header for a MIME entity part containing this file.

 **ModifiedTime** *long*
Default: 0

Specifies the number of milliseconds since 12:00:00 AM, January 1, 1970, that this file was last modified.

 **ModifiedTimeNanos** *int*
Default: 0

Includes a subsecond value associated with this file's [ModifiedTime](#SFTPFileAttributes_f_ModifiedTime).

 **OwnerId** *string*
Default: ""

Specifies the user Id of this file's owner.

 **Permissions** *int*
Default: 0

Includes a 32-bit integer containing the a POSIX-compatible file permission bitmask.

The bitmask should be interpreted as a decimal value of a series of octal digits. For example, an octal permission value of "100644" would be "33188" in Base10, and "40755" in octal would be "16877" in Base10.

The last three octal digits are the most significant and represent, in order, the file access capabilities of the file's owner, the owner's group, and other users. Each of these octal digits is, on its own, a 3-bit bitmask with the following possible values:

|  |  |
| --- | --- |
| 1 (001) | Execute |
| 2 (010) | Write |
| 4 (100) | Read |

An octal permission digit of 7 would have all three values set and would mean that the file can be read, written, and executed by that user class. For example, the octal permissions "100644" would have a value "6" for the owner, "4" for the group, and "4" for other users. This would be interpreted to mean that all users can read the file, no users can execute it, and only the owner can write it. The permissions "40755" would mean that all users can read and execute the file, but only the owner can write it.

The previous octal digit is another bitmask with the following values:

|  |  |
| --- | --- |
| 1 (001) | Sticky Bit - retain the file in memory for performance |
| 2 (010) | Set GID - sets the group Id of the process to the file's group Id upon execution (only for executable files) |
| 4 (100) | Set UID - sets the user Id of the process to the file's user Id upon execution (only for executable files) |

The previous two octal digits are used together as a bitmask to determine the type of file. This bitmask has the following values:

|  |  |
| --- | --- |
| 01 (000001) | Named pipe |
| 02 (000010) | Character special |
| 04 (000100) | Directory |
| 06 (000110) | Block special |
| 10 (001000) | Regular |
| 12 (001010) | Symbolic link |
| 14 (001100) | Socket |

For example, the octal file permissions "100644" would indicate a regular file and octal "40755" would indicate a directory.

NOTE: You will need to convert the octal permissions bitmask into its decimal representation.

 **PermissionsOctal** *string*
Default: ""

Includes an octal string containing the a POSIX-compatible file permission bitmask.

The bitmask should be interpreted as a series of octal digits. For example, "100644" and "40755".

The last three octal digits are the most significant and represent, in order, the file access capabilities of the file's owner, the owner's group, and other users. Each of these octal digits is, on its own, a 3-bit bitmask with the following possible values:

|  |  |
| --- | --- |
| 1 (001) | Execute |
| 2 (010) | Write |
| 4 (100) | Read |

An octal permission digit of 7 would have all three values set and would mean that the file can be read, written, and executed by that user class. For example, the octal permissions "100644" would have a value "6" for the owner, "4" for the group, and "4" for other users. This would be interpreted to mean that all users can read the file, no users can execute it, and only the owner can write it. The permissions "40755" would mean that all users can read and execute the file, but only the owner can write it.

The previous octal digit is another bitmask with the following values:

|  |  |
| --- | --- |
| 1 (001) | Sticky Bit - retain the file in memory for performance |
| 2 (010) | Set GID - sets the group Id of the process to the file's group Id upon execution (only for executable files) |
| 4 (100) | Set UID - sets the user Id of the process to the file's user Id upon execution (only for executable files) |

The previous two octal digits are used together as a bitmask to determine the type of file. This bitmask has the following values:

|  |  |
| --- | --- |
| 01 (000001) | Named pipe |
| 02 (000010) | Character special |
| 04 (000100) | Directory |
| 06 (000110) | Block special |
| 10 (001000) | Regular |
| 12 (001010) | Symbolic link |
| 14 (001100) | Socket |

For example, the octal file permissions "100644" would indicate a regular file and octal "40755" would indicate a directory.

 **Size** *long (read-only)*
Default: 0

Specifies the total size, in bytes, of this file.

 **TextHint** *int (read-only)*
Default: 0

Provides a hint for whether or not the file is a text file.

 **UntranslatedName** *string (read-only)*
Default: ""

Provides the untranslated name of the file.

# Config Settings ([SFTPClient](#sftpclient-component) Component)

 The component accepts one or more of the following *configuration settings*. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these *internal properties* is provided through the [Config](#config-method-sftpclient-component) method.

### SFTPClient Config Settings

**AllowBackslashInName**: Whether backslashes are allowed in folder and file names.By default the backslash character is treated as a path separator and is not allowed in file and folder names. When this configuration setting is set to True, backslashes "\" are allowed in file and folder names and are not supported as path separators.

The default value is False.

**AsyncTransfer**: Controls whether simultaneous requests are made to read or write files.When set to True, the component will make several requests to read or write data before waiting for a response from the server. The maximum number of these requests that can be made is controlled by [MaxOutstandingPackets](#MaxOutstandingPackets). The default is True.

**AttrAccessTime**: Can be queried for the AccessTime file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the AccessTime file attribute if it is present in the response from the server.

**AttrCreationTime**: Can be queried for the CreationTime file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the CreationTime file attribute if it is present in the response from the server.

**AttrFileType**: Can be queried for the FileType file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the FileType file attribute if it is present in the response from the server.

**AttrGroupId**: Can be queried for the GroupId file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the GroupId file attribute if it is present in the response from the server.

**AttrLinkCount**: Can be queried for the LinkCount file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the LinkCount file attribute if it is present in the response from the server.

**AttrOwnerId**: Can be queried for the OwnerId file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the OwnerId file attribute if it is present in the response from the server.

**AttrPermission**: Can be queried for the Permissions file attribute during the DirList event.During [DirList](#dirlist-event-sftpclient-component), this configuration setting can be queried to retrieve the value of the Permissions file attribute if it is present in the response from the server.

**CheckFileHash**: Compares a server-computed hash with a hash calculated locally.This setting may be queried to compare a hash of the file specified by [RemoteFile](#remotefile-property-sftpclient-component) with the hash calculated by the server. When queried, the component will ask the server to calculate a hash of the file. It will then compute a hash locally and compare the values to confirm that the content that exists in the file specified by [RemoteFile](#remotefile-property-sftpclient-component) is the same as the file specified by [LocalFile](#localfile-property-sftpclient-component).

The server must support the *check-file* extension.

The component supports the following hash algorithms (in order of preference): *sha256,sha224,sha384,sha512,sha1,md5*. The server may choose to use any value from this list. No action is needed to configure the algorithm, the component will automatically use the same algorithm that the server users.

If the extension is unsupported or a mismatch in hashes is detected, the component throws an exception. If the hashes match the value, *True* is returned.

```csharp
  try {
    String flag = sftp.Config("CheckFileHash");
    // flag will be equal to "True"
  }
  catch (Exception e) {
    // mismatch
  }
```

**DisableRealPath**: Controls whether or not the SSH_FXP_REALPATH request is sent.This configuration setting can be used to skip sending the SSH_FXP_REALPATH request, which asks the server to canonicalize the value in RemotePath to an absolute path. The default value is False, which will cause the component to send the request normally. If set to True, the component will not send the SSH_FXP_REALPATH packet and will use the value in RemotePath directly.

**ExcludeFileMask**: Specifies a file mask for excluding files in directory listings.This configuration setting specifies one or more file masks to be excluded during a directory listing. When using multiple masks, any files that match one or more of the masks will not be listed. For example, setting ExcludeFileMask to "*.txt", RemoteFile to "", and calling [ListDirectory](#listdirectory-method-sftpclient-component) will list all files except those ending in .txt.

**ExecFallbackCommand**: Specifies the fallback command to execute if the component fails to start the SFTP subsystem.This configuration setting specifies the fallback command to execute if the component fails to start the SFTP subsystem. By default, this config is set to the following commands:

*test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server\ntest -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server\nexec sftp-server*

When initiating a connection to an SFTP server, the component will always attempt to start the SFTP subsystem for the given connection. However, in the event the SFTP subsystem cannot be started successfully for any reason, this command (or set of commands) will be executed on the server in an attempt to start the SFTP server.

If necessary, this config may be set to another command or an empty string. An empty string indicates there should be no fallback command executed, and the component will throw an exception assuming the SFTP subsystem cannot be started.

**FileMaskDelimiter**: Specifies a delimiter to use for setting multiple file masks in the RemoteFile property.If specified, the RemoteFile property will be split into separate masks based on the chosen delimiter. The default is "", which will cause the RemoteFile property to be treated as a single value. When using multiple masks, any files that match one or more of the masks will be listed. For example, setting FileMaskDelimiter to "," and setting RemoteFile to "*.txt, *.csv" will list all files ending in .txt or .csv.

**FiletimeFormat**: Specifies the format to use when returning filetime strings.If specified, the component will use this value to format the filetime string returned through the [DirList](#dirlist-event-sftpclient-component) event. By default, the component will format the date as "MM/dd/yyyy HH:mm:ss".

**ForceMakeDirectory**: Controls whether calls to make a directory always attempt to create the directory on the server.By default (false), when [MakeDirectory](#makedirectory-method-sftpclient-component) is called, the component will first check if a file or directory already exists at the specified path. If an entry exists, the operation will succeed without sending a directory creation request to the server. When this configuration setting is set to True, the component will always send the directory creation request to the server regardless of whether the path already exists. This allows the server to determine the outcome of the operation.

This is useful in cases where a file may exist at the specified path. In such cases, many servers will return an error when attempting to create a directory with the same name, allowing the application to detect the conflict.

**FreeSpace**: The free space on the remote server in bytes.This property is populated after calling the [GetSpaceInfo](#GetSpaceInfo) configuration setting. This holds the total free space available on the drive on the remote server in bytes.

**GetSpaceInfo**: Queries the server for drive usage information.This configuration setting queries the server for the total space and free space available on the remote drive. When querying this setting, the component will immediately request the information from the server. After calling this setting the [TotalSpace](#TotalSpace) and [FreeSpace](#FreeSpace) configuration settings will be populated.

NOTE: The server must understand either the "statvfs@openssh.com" or "space-available" extension for this operation to succeed.

**GetSymlinkAttrs**: Whether to get the attributes of the symbolic link, or the resource pointed to by the link.When [FileAttributes](#fileattributes-property-sftpclient-component) is queried, the component will retrieve information about the [RemoteFile](#remotefile-property-sftpclient-component). This configuration setting controls the behavior when [RemoteFile](#remotefile-property-sftpclient-component) refers to a symbolic link on the server. By default the information returned by [FileAttributes](#fileattributes-property-sftpclient-component) is that of the actual file pointed to by the symbolic link, not the symbolic link itself.

If it is desired to retrieve the attributes of the symbolic link itself, set [GetSymlinkAttrs](#GetSymlinkAttrs) to *True* before querying [FileAttributes](#fileattributes-property-sftpclient-component).

**IgnoreFileMaskCasing**: Controls whether or not the file mask is case sensitive.This configuration setting applies to the file mask value specified by the [RemoteFile](#remotefile-property-sftpclient-component) property. The default value is True. If set to False, the file mask will be case sensitive.

**LocalEOL**: When TransferMode is set, this specifies the line ending for the local system.This configuration setting is applicable only when [TransferMode](#TransferMode) is set to 1 (ASCII). The default value is a CrLf character sequence.

 When uploading or downloading, this value will be compared to [ServerEOL](#ServerEOL). If [ServerEOL](#ServerEOL) and [LocalEOL](#LocalEOL) are different, the line endings in the file being transferred will be converted to the line endings used by the destination. Line endings will be converted to the value in [LocalEOL](#LocalEOL) when downloading. Line endings will be converted to the value in [ServerEOL](#ServerEOL) when uploading. If [ServerEOL](#ServerEOL) and [LocalEOL](#LocalEOL) are the same, no conversion takes place.

The value supplied to this setting must be quoted. For example:

```text
component.Config("LocalEOL=\"" + myEOLSequence + "\"");
```

 Where myEOLSequence is a Cr, Lf, or CrLf character sequence.

Conversion will only happen when [TransferMode](#TransferMode) is set to 1 (ASCII) and [ServerEOL](#ServerEOL) and [LocalEOL](#LocalEOL) are different.

**LogSFTPFileData**: Whether SFTP file data is present in Debug logs.This configuration setting controls whether file data is logged when [LogLevel](#LogLevel) is set to *3* (Debug). When False (default), the file data being transferred is not included. Set this value to True to include all traffic include file data.

NOTE: Setting this value to True will increase the amount of data that are logged.

**MaskSensitiveData**: Masks passwords in logs.The default value is True. When set to True, the component will mask passwords that otherwise would appear in its logs.

**MaxFileData**: Specifies the maximum payload size of an SFTP packet.Although the Secure Shell (SSH) specification requires servers and clients to support SSH packets of at least 32,000 bytes, some server implementations limit the packet size to smaller values. MaxFileData provides a means by which the user can specify the maximum amount of data that can be put into a Secure File Transfer Protocol (SFTP) packet so that the component can communicate effectively with these servers. If you are having difficulty when uploading to a server, try setting MaxFileData size to a value smaller than 32,000.

Most servers that use smaller values will use a maximum SSH packet size of 16KB (16384). To most efficiently communicate with such servers, MaxFileData size should be set to 14745.

NOTE: Values larger than 64,000 (65,536) may not be respected by some servers (such as OpenSSH) and will result in unexpected behavior. If specifying a value, it is *recommended* to set a value less than or equal to 65,536.

The default value is 32,768.

**MaxOutstandingPackets**: Sets the maximum number of simultaneous read or write requests allowed.This configuration setting sets the number of simultaneous read or write requests allowed. This configuration setting applies only when [AsyncTransfer](#AsyncTransfer) is True. The default is *32*.

**NegotiatedProtocolVersion**: The negotiated SFTP version.This configuration setting returns the negotiated version of SFTP. Query this to ensure that the correct version was negotiated. This configuration setting is read only.

**NormalizeRemotePath**: Whether to normalize the RemotePath.When set to True, the component will normalize the value in RemotePath by appending a forward slash (/) if one is not already present. "." and ".." are special cases and will not be affected. The default is True.

**PreserveFileTime**: Preserves the file's timestamps during transfer.If set to True, the component will preserve the file's timestamps during transfer. This is applicable to both uploads and downloads. The default value is False.

**ProtocolVersion**: The highest allowable SFTP version to use.This configuration setting governs the highest allowable SFTP version to use when negotiating the version with the server. The default value is 3 because this is the most common version. The component supports values from 3 to 6. It is recommended to use the default value of 3 unless there is a specific reason a higher version is needed.

**ReadLink**: This settings returns the target of a specified symbolic link.This configuration setting returns the target of the specified symbolic link. To use the setting, pass the remote path and file name of the symbolic link. For example:

```csharp
string resolvedPath = component.Config("ReadLink=/home/test/mysymlink.txt");
```

**RealPathControlFlag**: Specifies the control-byte field sent in the SSH_FXP_REALPATH request.The RealPathControlFlag configuration setting can be used to specify the control flags sent to the SFTP server in the SSH_FXP_REALPATH request. This can be set to one of the following values:

|  |  |
| --- | --- |
| SSH_FXP_REALPATH_NO_CHECK (1) | Server should not check if the path exists. |
| SSH_FXP_REALPATH_STAT_IF (2) | Server should return the file/directory attributes if the path exists and is accessible, but should not fail otherwise. |
| SSH_FXP_REALPATH_STAT_ALWAYS (3) | Server should return the file/directory attributes if the path exists and is accessible; otherwise, it fails with an error. |

 If this configuration setting is not set, no control flags will be specified in the request and SSH_FXP_REALPATH_NO_CHECK will be assumed.

**RealTimeUpload**: Enables real time uploading.When this value is set to True, the component will upload the data in the file specified by [LocalFile](#localfile-property-sftpclient-component) and continue monitoring [LocalFile](#localfile-property-sftpclient-component) for additional data to upload until no new data are found for [RealTimeUploadAgeLimit](#RealTimeUploadAgeLimit) seconds. This allows you to start uploading a file immediately after the file is created and continue uploading as data is written to the file. The default value is False.

**RealTimeUploadAgeLimit**: The age limit in seconds when using RealTimeUpload.This value is applicable only when [RealTimeUpload](#RealTimeUpload) is set to True. This specifies the number of seconds for which the component will monitor [LocalFile](#localfile-property-sftpclient-component) for new data to upload. If this limit is reached and no new data are found in [LocalFile](#localfile-property-sftpclient-component), the upload will complete. The default value is 1.

**ServerEOL**: When TransferMode is set, this specifies the line ending for the remote system.This configuration setting is applicable only when [TransferMode](#TransferMode) is set to 1 (ASCII). The default value is a CrLf character sequence.

 When uploading or downloading, this value will be compared to [LocalEOL](#LocalEOL). If [ServerEOL](#ServerEOL) and [LocalEOL](#LocalEOL) are different, the line endings in the file being transferred will be converted to the line endings used by the destination. Line endings will be converted to the value in [LocalEOL](#LocalEOL) when downloading. Line endings will be converted to the value in [ServerEOL](#ServerEOL) when uploading. If [ServerEOL](#ServerEOL) and [LocalEOL](#LocalEOL) are the same, no conversion takes place.

The value supplied to this setting must be quoted. For example:

```text
component.Config("ServerEOL=\"" + myEOLSequence + "\"");
```

 Where myEOLSequence is a Cr, Lf, or CrLf character sequence.

Conversion will happen only when [TransferMode](#TransferMode) is set to 1 (ASCII) and [ServerEOL](#ServerEOL) and [LocalEOL](#LocalEOL) are different.

**SimultaneousTransferLimit**: The maximum number of simultaneous file transfers.This configuration setting specifies the maximum number of simultaneous file transfers. This is used when processing files added to the transfer queue by [QueueFile](#queuefile-method-sftpclient-component). The default value is 5.

**TotalSpace**: The total space on the remote server in bytes.This property is populated after calling the [GetSpaceInfo](#GetSpaceInfo) configuration setting. This holds the total space on the drive on the remote server in bytes.

**TransferMode**: The transfer mode (ASCII or Binary).The value 0 represents binary and the value 1 represents ASCII. If the value is 0 (default), the initial server mode will be used.

When this value is set to 1 (ASCII) the component will use the values specified in [LocalEOL](#LocalEOL) and [ServerEOL](#ServerEOL) to convert line endings as appropriate.

NOTE: When this value is set to 1 (ASCII) and [ProtocolVersion](#ProtocolVersion) is set to 4 or higher the component will automatically determine the value for [ServerEOL](#ServerEOL) if the server supports the *newline* protocol extension.

**TransferredDataLimit**: Specifies the maximum number of bytes to download from the remote file.This configuration setting specifies the maximum number of bytes that should be downloaded from the current [RemoteFile](#remotefile-property-sftpclient-component) when [Download](#download-method-sftpclient-component) is called. The component will stop downloading data if it reaches the specified limit, or if there are no more data to download.

This configuration setting can be used in conjunction with the [StartByte](#startbyte-property-sftpclient-component) property to download a specific range of data from the current [RemoteFile](#remotefile-property-sftpclient-component).

**UseFxpStat**: Whether SSH_FXP_STAT is sent.For certain operations the component will send SSH_FXP_STAT to get a file's attributes. Some servers do not support this packet and will return an error.

Set this to *false* to not send the packet. This will cause [PreserveFileTime](#PreserveFileTime) to not work and prevent *PercentDone* in [Transfer](#transfer-event-sftpclient-component) from being calculated.

The default is *true*.

### SSHClient Config Settings

**ChannelDataEOL[ChannelId]**: Used to break the incoming data stream into chunks.By *default* [MaxChannelDataLength](#MaxChannelDataLength) is *0* and [ChannelDataEOL](#ChannelDataEOL) is an empty string. SSHChannelData fires whenever an SSH_MSG_CHANNEL_DATA packet is received.

If [MaxChannelDataLength](#MaxChannelDataLength) is greater than *0* and [ChannelDataEOL](#ChannelDataEOL) is a nonempty string, the component will internally buffer data waiting to fire SSHChannelData until either [MaxChannelDataLength](#MaxChannelDataLength) is reached or [ChannelDataEOL](#ChannelDataEOL) is found, whichever comes first. Query [ChannelDataEOLFound](#ChannelDataEOLFound) to know which condition was met. The buffer is reset any time SSHChannelData fires.

[ChannelDataEOL](#ChannelDataEOL) and [MaxChannelDataLength](#MaxChannelDataLength) *must* be set together or unexpected behavior could occur.

**ChannelDataEOLFound[ChannelId]**: Determines if ChannelDataEOL was found.If *true*,then [ChannelDataEOL](#ChannelDataEOL) was found. If *false*, then [MaxChannelDataLength](#MaxChannelDataLength) was reached.

This configuration setting is valid only when queried inside SSHChannelData, [MaxChannelDataLength](#MaxChannelDataLength) > 0, and [ChannelDataEOL](#ChannelDataEOL) is nonempty.

**ClientSSHVersionString**: The SSH version string used by the component.This configuration setting specifies the Secure Shell (SSH) version string used by the component. The default value is "SSH-2.0-IPWorks SSH Client 2024".

Most SSH servers expect the SSH version string to have the expected format "SSH-protocol version-software version". See above for an example.

**ConnectAndLogin**: Whether the component performs a full SSH login.The default value is *true*. When enabled, calling the [Connect](#connect-method-sftpclient-component) method establishes the TCP connection and performs a full SSH login.

When set to *false*, calling [Connect](#connect-method-sftpclient-component) will only establish the underlying TCP connection; the SSH login will not be performed. This may be useful in cases in which it is desirable to separate the connection and logon operations; for instance, confirming a host is available before authenticating with it.

When [ConnectAndLogin](#ConnectAndLogin) is *false*, call [SSHLogon](#sshlogon-method-sftpclient-component) with the same [SSHHost](#sshhost-property-sftpclient-component) and [SSHPort](#sshport-property-sftpclient-component) used to connect in order to complete the SSH login over the existing connection. Note that [SSHLogon](#sshlogon-method-sftpclient-component) always performs a full SSH login regardless of the value of this configuration setting.

**DoNotRepeatAuthMethods**: Whether the component will repeat authentication methods during multifactor authentication.The default value is *true*. When set to *false*, the component will repeat authentication methods that have already been completed during multifactor authentication.

**EnablePageantAuth**: Whether to use a key stored in Pageant to perform client authentication.This configuration setting controls whether Pageant authentication is disabled, enabled, or required. When enabled or required, the component attempts to communicate with PuTTY's ssh-agent, called "Pageant", over shared memory to perform public key authentication. Possible values and the corresponding behavior is described as follows:

| Value | Description |
| --- | --- |
| 0 (Disabled - default) | No communication with Pageant is attempted. |
| 1 (Enabled) | Pageant authentication is used if available. If Pageant is not running, or does not contain the expected key, no error is thrown. |
| 2 (Required) | Only Pageant authentication is used. If Pageant is not running, or does not contain the expected key, an error is thrown. |

**Example 1. Enabling Pageant:**

```text
component.Config("EnablePageantAuth=1");
component.SSHUser = "sshuser";
component.SSHLogon("localhost", 22);
```

NOTE: This functionality is available only on Windows.

**KerberosDelegation**: If true, asks for credentials with delegation enabled during authentication.The default value is "True". If set to "False", the client will not ask for credentials delegation support during authentication.

NOTE: Even if the client asks for delegation, the server/KDC might not grant it, and authentication will still succeed.

**KerberosRealm**: The fully qualified domain name of the Kerberos Realm to use for GSSAPI authentication.This property may be set to the fully qualified (DNS) name of the kerberos realm (or Windows Active Directory domain name) to use during GSSAPI authentication. This can be used to force authentication with a given realm if the client and server machines are not part of the same domain.

**KerberosSPN**: The Kerberos Service Principal Name of the SSH host.This property can be set to specify the Service Principal Name (SPN) associated with the SSH service on the remote host. This will usually be in the form "host/fqdn.of.sshhost[@REALM]". If not specified, the component will assume the SPN is based on the value of the [SSHHost](#sshhost-property-sftpclient-component) property and the kerberos realm used for authentication.

**KeyRenegotiationThreshold**: Sets the threshold for the SSH Key Renegotiation.This property allows you to specify the threshold, in the number of bytes, for the Secure Shell (SSH) key renegotiation. The default value for this property is set to 1 GB.

**Example. Setting the Threshold to 500 MB:**

```text
SSHComponent.Config("KeyRenegotiationThreshold=524288000")
```

**LogLevel**: Specifies the level of detail that is logged.This configuration setting controls the level of detail that is logged through the [Log](#log-event-sftpclient-component) event. Possible values are as follows:

|  |  |
| --- | --- |
| 0 (None) | No messages are logged. |
| 1 (Info - Default) | Informational events such as Secure Shell (SSH) handshake messages are logged. |
| 2 (Verbose) | Detailed data such as individual packet information are logged. |
| 3 (Debug) | Debug data including all relevant sent and received bytes are logged. |

**MaxChannelDataLength[ChannelId]**: The maximum amount of data to accumulate when no ChannelDataEOL is found.By *default* [MaxChannelDataLength](#MaxChannelDataLength) is *0* and [ChannelDataEOL](#ChannelDataEOL) is an empty string. SSHChannelData fires whenever an SSH_MSG_CHANNEL_DATA packet is received.

If [MaxChannelDataLength](#MaxChannelDataLength) is greater than *0* and [ChannelDataEOL](#ChannelDataEOL) is a nonempty string, the component will internally buffer data waiting to fire SSHChannelData until either [MaxChannelDataLength](#MaxChannelDataLength) is reached or [ChannelDataEOL](#ChannelDataEOL) is found, whichever comes first. Query [ChannelDataEOLFound](#ChannelDataEOLFound) to know which condition was met. The buffer is reset any time SSHChannelData fires.

[ChannelDataEOL](#ChannelDataEOL) and [MaxChannelDataLength](#MaxChannelDataLength) *must* be set together or unexpected behavior could occur.

**MaxPacketSize**: The maximum packet size of the channel, in bytes.This configuration setting specifies the maximum size of an individual data packet, in bytes, that can be sent to the sender.

**MaxWindowSize**: The maximum window size allowed for the channel, in bytes.This configuration setting specifies how many bytes of channel data can be sent to the sender of this message without adjusting the window.

NOTE: This value may be changed during the connection, but the window size can only be increased, not decreased.

**NegotiatedStrictKex**: Returns whether strict key exchange was negotiated to be used.This configuration setting specifies whether strict key exchange (strict kex) was negotiated during the SSH handshake. If strict kex is being used, then this will return *"True"*. If strict kex is not being used, then this will return *"False"*.

```text
component.Config("NegotiatedStrictKex")
```

**PasswordPrompt**: The text of the password prompt used in keyboard-interactive authentication.This configuration setting optionally specifies a pattern to be matched to the prompt received from the server during keyboard-interactive authentication. If a matching prompt is detected the component automatically responds to the prompt with the password specified by [SSHPassword](#sshpassword-property-sftpclient-component).

This provides an easy way to automatically reply to prompts with the password if one is presented by the server. The password will be autofilled in the *Response* parameter of the [SSHKeyboardInteractive](#sshkeyboardinteractive-event-sftpclient-component) event in the case of a match.

The following special characters are supported for pattern matching:

|  |  |
| --- | --- |
| ? | Any single character. |
| * | Any characters or no characters (e.g., C*t matches Cat, Cot, Coast, Ct). |
| [,-] | A range of characters (e.g., [a-z], [a], [0-9], [0-9,a-d,f,r-z]). |
| \ | The slash is ignored and exact matching is performed on the next character. |

If these characters need to be used as a literal in a pattern, then they must be escaped by surrounding them with brackets []. NOTE: "]" and "-" do not need to be escaped. See below for the escape sequences:

| Character | Escape Sequence |
| --- | --- |
| ? | [?] |
| * | [*] |
| [ | [[] |
| \ | [\] |

For example, to match the value [Something].txt, specify the pattern [[]Something].txt.

**PreferredDHGroupBits**: The size (in bits) of the preferred modulus (p) to request from the server.This configuration setting may be when using the diffie-hellman-group-exchange-sha1 or diffie-hellman-group-exchange-sha256 key exchange algorithms to control the preferred size, in bits, of the modulus (p) prime number to request from the server. Acceptable values are between 1024 and 8192.

**RecordLength**: The length of received data records.If set to a positive value, this configuration setting defines the length of data records to be received. The component will accumulate data until RecordLength is reached and only then will it fire the DataIn event with data of length RecordLength. This allows data to be received as records of known length. This value can be changed at any time, including within the DataIn event.

The default value is 0, meaning this setting is not used.

**ServerSSHVersionString**: The remote host's SSH version string.This configuration setting will return the remote host's SSH version string, which can help when identifying problematic servers. This configuration setting is read-only.

**SignedSSHCert**: The CA signed client public key used when authenticating.When authenticating via public key authentication, this setting may be set to the certificate authority (CA) signed client's public key. This is useful when the server has been configured to trust client keys signed by a particular CA. For instance:

```text
component.Config("SignedSSHCert=ssh-rsa-cert-v01@openssh.com AAAAB3NzaC1yc2EAAAADAQABAAAB...");
```

 The algorithm such as *ssh-rsa-cert-v01@openssh.com* in the previous string is used as part of the authentication process. To use a different algorithm, simply change this value. For instance, all of the following are acceptable with the same signed public key:

- *ssh-rsa-cert-v01@openssh.com AAAAB3NzaC1yc2EAAAADAQABAAAB...*
- *rsa-sha2-256-cert-v01@openssh.com AAAAB3NzaC1yc2EAAAADAQABAAAB...*
- *rsa-sha2-512-cert-v01@openssh.com AAAAB3NzaC1yc2EAAAADAQABAAAB...*

**SSHAcceptAnyServerHostKey**: If set the component will accept any key presented by the server.The default value is "False". Set this to "True" to accept any key presented by the server.

**SSHAcceptServerCAKey**: The CA public key that signed the server's host key.If the server's host key was signed by a CA, this configuration setting may be used to specify the CA's public key. If specified, the component will trust any server's host key that was signed by the CA. For instance:

```text
component.Config("SSHAcceptServerCAKey=ssh-rsa AAAAB3NzaC1yc2EAAAADAQAB...");
```

**SSHAcceptServerHostKeyFingerPrint**: The fingerprint(s) of the server host keys to accept.This configuration setting specifies one or more fingerprints that should be accepted as the servers host key. Each fingerprint should be represented using the hash algorithm and encoding format defined by the [SSHFingerprintHashAlgorithm](#SSHFingerprintHashAlgorithm) and [SSHFingerprintEncoding](#SSHFingerprintEncoding) configs, respectively.

By default, this config should be specified as the comma-separated list of hex-encoded SHA256 hashes of possible server host keys.

**Example:**

```text
// Assuming default values. Hex-encoded, SHA256 hash of the expected host key
SSHClient.Config("SSHAcceptServerHostKeyFingerPrint=61:2d:89:9c:55:67:5e:ca:22:86:fc:f6:07:59:67:e0:c7:77:08:1f:cc:d9:93:f3:f9:63:21:15:3e:0c:a2:1b");

// Base64-encoded, SHA256 hash of the expected host key
SSHClient.Config("SSHFingerprintEncoding=1");
SSHClient.Config("SSHAcceptServerHostKeyFingerPrint=n4bQgYhMfWWaL+qgxVrQFaO/TxsrC4Is0V1sFbDwCgg=");
```

 If the server's fingerprint matches one of the values supplied, the component will accept the host key.

**SSHFingerprintEncoding**: Specifies the encoding used when displaying the SSH host key fingerprint.This setting determines how the SSH host key fingerprint is displayed after it has been computed using the algorithm specified by [SSHFingerprintHashAlgorithm](#SSHFingerprintHashAlgorithm). Possible values are:

- *0* (Hex Encoded)
- *1* (Base64 Encoded - Default)

For example, when set to *0*, the Fingerprint parameter in [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) will be formatted like: *0a:1b:2c:3d*. When set to *1*, the Fingerprint parameter in [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) will be formatted like:

```plaintext
n4bQgYhMfWWaL+qgxVrQFaO/TxsrC4Is0V1sFbDwCgg=
```

.

Note that this config is also applicable when querying the [SSHFingerprintMD5](#SSHFingerprintMD5), [SSHFingerprintSHA1](#SSHFingerprintSHA1), or [SSHFingerprintSHA256](#SSHFingerprintSHA256) configuration settings.

Additionally, note that this config is also applicable if specifying the host key fingerprint via [SSHAcceptServerHostKeyFingerPrint](#SSHAcceptServerHostKeyFingerPrint). The value specified via [SSHAcceptServerHostKeyFingerPrint](#SSHAcceptServerHostKeyFingerPrint) should be specified according to the format or encoding specified by this configuration setting.

**SSHFingerprintHashAlgorithm**: The algorithm used to calculate the fingerprint.This configuration setting controls which hash algorithm is used to calculate the hostkey's fingerprint, displayed when [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) fires. Valid values are as follows:

- *MD5*
- *SHA1*
- *SHA256* (default)

**SSHFingerprintMD5**: The server hostkey's MD5 fingerprint.This configuration setting may be queried in [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) to get the server hostkey's MD5 fingerprint.

**SSHFingerprintSHA1**: The server hostkey's SHA1 fingerprint.This configuration setting may be queried in [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) to get the server hostkey's SHA-1 fingerprint.

**SSHFingerprintSHA256**: The server hostkey's SHA256 fingerprint.This configuration setting may be queried in [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) to get the server hostkey's SHA-256 fingerprint.

**SSHKeepAliveCountMax**: The maximum number of keep alive packets to send without a response.This configuration setting specifies the maximum number of keep-alive packets to send when no response is received. Normally a response to a keep-alive packet is received right away. If no response is received, the component will continue to send keep-alive packets until [SSHKeepAliveCountMax](#SSHKeepAliveCountMax) is reached. If this is reached, the component will assume the connection is broken and disconnect. The default value is 5.

**SSHKeepAliveInterval**: The interval between keep alive packets.This configuration setting specifies the number of seconds between keep alive packets. If set to a positive value, the component will send a SSH keep-alive packet after [KeepAliveInterval](#KeepAliveInterval) seconds of inactivity. This configuration setting takes effect only when there is no activity; if any data are sent or received over the connection, it will reset the timer.

The default value is 0, meaning no keep alives will be sent.

NOTE: The SSHREVERSETUNNEL component uses a default value of 30.

**SSHKeyExchangeAlgorithms**: Specifies the supported key exchange algorithms.This configuration setting may be used to specify the list of supported key exchange algorithms used during Secure Shell (SSH) negotiation. The value should contain a comma-separated list of algorithms. Supported algorithms are as follows:

- curve25519-sha256
- curve25519-sha256@libssh.org
- diffie-hellman-group1-sha1
- diffie-hellman-group14-sha1
- diffie-hellman-group14-sha256
- diffie-hellman-group16-sha512
- diffie-hellman-group18-sha512
- diffie-hellman-group-exchange-sha256
- diffie-hellman-group-exchange-sha1
- ecdh-sha2-nistp256
- ecdh-sha2-nistp384
- ecdh-sha2-nistp521
- gss-group14-sha256
- gss-group16-sha512
- gss-nistp256-sha256
- gss-curve25519-sha256
- gss-group14-sha1
- gss-gex-sha1
- mlkem768x25519-sha256

 The default value is *curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,mlkem768x25519-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,gss-group14-sha256,gss-group16-sha512,gss-nistp256-sha256,gss-curve25519-sha256,gss-group14-sha1,gss-gex-sha1*.

**SSHKeyRenegotiate**: Causes the component to renegotiate the SSH keys.Once this configuration setting is queried, the component will renegotiate the SSH keys with the remote host.

**Example 3. Renegotiating SSH Keys:**

```text
SSHClient.Config("SSHKeyRenegotiate")
```

**SSHMacAlgorithms**: Specifies the supported Mac algorithms.This configuration setting may be used to specify an alternate list of supported Mac algorithms used during SSH negotiation. This also specifies the order in which the Mac algorithms are preferred. The value should contain a comma-separated list of algorithms. Supported algorithms are as follows:

- hmac-sha1
- hmac-md5
- hmac-sha1-96
- hmac-md5-96
- hmac-sha2-256
- hmac-sha2-256-96
- hmac-sha2-512
- hmac-sha2-512-96
- hmac-ripemd160
- hmac-ripemd160-96
- hmac-sha2-256-etm@openssh.com
- hmac-sha2-512-etm@openssh.com
- hmac-sha2-256-96-etm@openssh.com
- hmac-sha2-512-96-etm@openssh.com
- umac-64@openssh.com
- umac-64-etm@openssh.com
- umac-128@openssh.com
- umac-128-etm@openssh.com

 The default value is *hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5,hmac-ripemd160,hmac-sha1-96,hmac-md5-96,hmac-sha2-256-96,hmac-sha2-512-96,hmac-ripemd160-96,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-64@openssh.com,umac-64-etm@openssh.com,umac-128@openssh.com,umac-128-etm@openssh.com*.

**SSHPubKeyAuthSigAlgorithms**: Specifies the enabled signature algorithms that may be used when attempting public key authentication.This setting specifies a list of signature algorithms that may be used when authenticating to the server using public key authentication. This applies only when public key authentication is performed by the client.

The setting should be a comma-separated list of algorithms. At runtime, the component will evaluate the specified algorithms, and if the algorithm is applicable to the certificate specified in [SSHCert](#sshcert-property-sftpclient-component), it will be used. If the algorithm is not applicable, the component will evaluate the next algorithm. Possible values are as follows:

- ssh-rsa
- rsa-sha2-256
- rsa-sha2-512
- ssh-dss
- ecdsa-sha2-nistp256
- ecdsa-sha2-nistp384
- ecdsa-sha2-nistp521
- ssh-ed25519
- x509v3-sign-rsa
- x509v3-sign-dss

The default value in Windows is *ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519*.

**rsa-sha2-256 and rsa-sha2-512 notes**

The component will query the server for supported algorithms when connecting. If the server indicates support for *rsa-sha2-256* or *rsa-sha2-512* and the algorithm is present in the list defined by this setting (as in the default value), that algorithm will be used instead of *ssh-rsa* even when *ssh-rsa* appears first in the list.

For the *rsa-sha2-256* and *rsa-sha2-512* algorithms to be automatically preferred, the server must support the *ext-info-c* mechanism. In practice, older servers do not support this, and in that case, *ssh-rsa* will be used because it appears first in the list. Newer servers do support this mechanism, and in that case, *rsa-sha2-256* or *rsa-sha2-512* will be used even though it appears after *ssh-rsa*.

This behavior has been carefully designed to provide maximum compatibility while automatically using more secure algorithms when connecting to servers that support them.

**SSHPublicKeyAlgorithms**: Specifies the supported public key algorithms for the server's public key. This configuration setting specifies the allowed public key algorithms for the server's public key. This list controls only the public key algorithm used when authenticating the server's public key. This list has no bearing on the public key algorithms that can be used by the client when performing public key authentication to the server. The default value is *ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512,ssh-rsa,ssh-dss,x509v3-sign-rsa,x509v3-sign-dss*.

**SSHVersionPattern**: The pattern used to match the remote host's version string.This configuration setting specifies the pattern used to accept or deny the remote host's SSH version string. It takes a comma-delimited list of patterns to match. The default value is "*SSH-1.99-*,*SSH-2.0-*" and will accept connections from SSH 1.99 and 2.0 hosts. As an example, the following value would accept connections for SSH 1.99, 2.0, and 2.99 hosts.

```text
*SSH-1.99-*,*SSH-2.0-*,*SSH-2.99-*
```

**TryAllAvailableAuthMethods**: If set to true, the component will try all available authentication methods.The default value is *false*. When set to *true*, the component will try to authenticate using all methods that it has credentials for and the server supports.

**UseStrictKeyExchange**: Specifies how strict key exchange is supported.This configuration setting controls whether strict key exchange (strict kex) is enabled to mitigate the Terrapin attack. When enabled, the component will indicate support for strict key exchange by automatically including the pseudo-algorithm *kex-strict-c-v00@openssh.com* for client components and *kex-strict-s-v00@openssh.com* for server components in the list of supported key exchange algorithms.

Because both client and server must implement strict key exchange to effectively mitigate the Terrapin attack, the component provides options to further control the behavior in different scenarios. Possible values for this setting are as follows:

|  |  |
| --- | --- |
| 0 | Disabled. Strict key exchange is not supported in the component. |
| 1 (default) | Enabled, but not enforced. This setting enables strict key exchange, but if the remote host does not support strict key exchange the connection is still allowed to continue. |
| 2 | Enabled, but will reject affected algorithms if the remote host does not support strict key exchange. If the remote host supports strict key exchange, all algorithms may be used. If the remote host does not support strict key exchange, the connection will continue only if the selected encryption and message authentication code (MAC) algorithms are not affected by the Terrapin attack. |
| 3 | Required. If the remote host does not support strict key exchange, the connection will fail. |

**WaitForChannelClose**: Whether to wait for channels to be closed before disconnected.This configuration setting controls whether the component will wait for a server response to the SSH_MSG_CHANNEL_CLOSE when disconnecting. When the component disconnects, it will first attempt to close all open channels by sending a SSH_MSG_CHANNEL_CLOSE for each channel. This configuration setting controls whether the component will wait for a server response after sending the messages.

When *True* (default), the component will wait for a response to the channel close message until the responses have been received, the server closes the connection, or [Timeout](#timeout-property-sftpclient-component) seconds is reached.

When *False*, the component will still send the channel close messages, but it will not wait for a response and will proceed to close the connection.

**WaitForServerDisconnect**: Whether to wait for the server to close the connection.This configuration setting controls whether to wait for the server to close the connection when [SSHLogoff](#sshlogoff-method-sftpclient-component) is called.

When set to *True*, the component will initiate the disconnection sequence by sending SSH_MSG_DISCONNECT, but it will not close the connection and instead will wait for the server to close the connection. Setting this to True may be beneficial in circumstances in which many connections are being established, to avoid port exhaustion when sockets are in a TIME_WAIT state. Allowing the server to close the connection avoids the TIME_WAIT state of socket on the client machine.

When set to *False* (default), the client will close the connection. It is recommended to use this value unless there is a specific need to change it.

### Base Config Settings

**BuildInfo**: Information about the product's build.When queried, this setting will return a string containing information about the product's build.

**GUIAvailable**: Whether or not a message loop is available for processing events.In a GUI-based application, long-running blocking operations may cause the application to stop responding to input until the operation returns. The component will attempt to discover whether or not the application has a message loop and, if one is discovered, it will process events in that message loop during any such blocking operation.

In some non-GUI applications, an invalid message loop may be discovered that will result in errant behavior. In these cases, setting [GUIAvailable](#GUIAvailable) to *false* will ensure that the component does not attempt to process external events.

**LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a component is using. It will return the following information:

- Product: The product the license is for.
- Product Key: The key the license was generated from.
- License Source: Where the license was found (e.g., RuntimeLicense, License File).
- License Type: The type of license installed (e.g., Royalty Free, Single Server).
- Last Valid Build: The last valid build number for which the license will work.

**MaskSensitiveData**: Whether sensitive data is masked in log messages.In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to *true* to mask sensitive data. The default is *true*.

**UseFIPSCompliantAPI**: Tells the component whether or not to use FIPS certified APIs.When set to *true*, the component will utilize the underlying operating system's certified APIs. Java editions, regardless of OS, utilize Bouncy Castle Federal Information Processing Standards (FIPS), while all other Windows editions make use of Microsoft security libraries.

FIPS mode can be enabled by setting the *UseFIPSCompliantAPI* configuration setting to *true*. This is a static setting that applies to all instances of all components of the toolkit within the process. It is recommended to enable or disable this setting once before the component has been used to establish a connection. Enabling FIPS while an instance of the component is active and connected may result in unexpected behavior.

For more details, please see the [FIPS 140-2 Compliance](https://www.nsoftware.com/kb/articles/fips.rst) article.

NOTE: This setting is applicable only on Windows.

NOTE: Enabling FIPS compliance requires a special license; please contact [sales@nsoftware.com](mailto:sales@nsoftware.com) for details.

**UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the component will use the system security libraries by default to perform cryptographic functions where applicable. In this case, calls to unmanaged code will be made. In certain environments, this is not desirable. To use a completely managed security implementation, set this setting to *true*.

Setting this configuration setting to *true* tells the component to use the internal implementation instead of using the system security libraries.

 On Windows, this setting is set to *false* by default. On Linux/macOS, this setting is set to *true* by default.

NOTE: This setting is static. The value set is applicable to all components used in the application.

When this value is set, the product's system dynamic link library (DLL) is no longer required as a reference, as all unmanaged code is stored in that file.

# Trappable Errors ([SFTPClient](#sftpclient-component) Component)

### SFTPClient Errors

|  |  |
| --- | --- |
| 118 | Firewall error. Error description contains detailed information. |
| 1102 | The server's SFTP draft version is unsupported. |
| 1103 | SFTP command failed. Error description contains detailed information. |
| 1104 | Server does not support renaming. |
| 1105 | Received invalid response from server. Error description contains detailed information. |
| 1106 | Cannot resolve path: path does not exist. |
| 1107 | You must set [LocalFile](#localfile-property-sftpclient-component)/[RemoteFile](#remotefile-property-sftpclient-component) before attempting to download/upload. |
| 1108 | Cannot download file: [LocalFile](#localfile-property-sftpclient-component) exists and [Overwrite](#overwrite-property-sftpclient-component) is set to False. |
| 1109 | [CheckFileHash](#CheckFileHash) failed because of hash value mismatch. |

### SSHClient Errors

|  |  |
| --- | --- |
| 1001 | Server has disconnected. |
| 1002 | Protocol version unsupported or other issue with version string. |
| 1003 | Cannot negotiate algorithms. |
| 1005 | Selected algorithm unsupported. |
| 1006 | Cannot set keys. |
| 1010 | Unexpected algorithm. |
| 1011 | Cannot create exchange hash. |
| 1012 | Cannot make key. |
| 1013 | Cannot sign data. |
| 1014 | Cannot encrypt packet. |
| 1015 | Cannot decrypt packet. |
| 1016 | Cannot decompress packet. |
| 1020 | Failure to open channel. |
| 1021 | Invalid channel Id. |
| 1022 | Invalid channel data. |
| 1023 | Invalid channel message. |
| 1024 | SSH message unimplemented. |
| 1027 | Server message unsupported. |
| 1030 | Server's host key was rejected. The host key may be accepted within the [SSHServerAuthentication](#sshserverauthentication-event-sftpclient-component) event or using the [SSHAcceptServerHostKey](#sshacceptserverhostkey-property-sftpclient-component) property. |
| 1031 | Cannot verify server's host key. |
| 1032 | Authentication failed. Check description for details. |
| 1033 | Channel request failed. |
| 1034 | Diffie-Hellman exchange failed. |
| 1036 | SSH connection failed. |
| 1037 | SSH reconnect limit reached. |
| 1038 | Elliptic curve Diffie-Hellman exchange failed. |
| 1039 | SSH keep-alive limit reached. |
| 1098 | Request failure. |
| 1130 | Would block error. |
| 1133 | Would block, reason: key reExchange. |

The component may also return one of the following error codes, which are inherited from other components.

### TCPClient Errors

|  |  |
| --- | --- |
| 100 | You cannot change the RemotePort at this time. A connection is in progress. |
| 101 | You cannot change the RemoteHost (Server) at this time. A connection is in progress. |
| 102 | The RemoteHost address is invalid (0.0.0.0). |
| 104 | Already connected. If you want to reconnect, close the current connection first. |
| 106 | You cannot change the [LocalPort](#localport-property-sftpclient-component) at this time. A connection is in progress. |
| 107 | You cannot change the [LocalHost](#localhost-property-sftpclient-component) at this time. A connection is in progress. |
| 112 | You cannot change [MaxLineLength](#MaxLineLength) at this time. A connection is in progress. |
| 116 | RemotePort cannot be zero. Please specify a valid service port number. |
| 117 | You cannot change the UseConnection option while the component is active. |
| 135 | Operation would block. |
| 201 | Timeout. |
| 211 | Action impossible in control's present state. |
| 212 | Action impossible while not connected. |
| 213 | Action impossible while listening. |
| 301 | Timeout. |
| 303 | Could not open file. |
| 434 | Unable to convert string to selected CodePage. |
| 1105 | Already connecting. If you want to reconnect, close the current connection first. |
| 1117 | You need to connect first. |
| 1119 | You cannot change the LocalHost at this time. A connection is in progress. |
| 1120 | Connection dropped by remote host. |

### TCP/IP Errors

|  |  |
| --- | --- |
| 10004 | [10004] Interrupted system call. |
| 10009 | [10009] Bad file number. |
| 10013 | [10013] Access denied. |
| 10014 | [10014] Bad address. |
| 10022 | [10022] Invalid argument. |
| 10024 | [10024] Too many open files. |
| 10035 | [10035] Operation would block. |
| 10036 | [10036] Operation now in progress. |
| 10037 | [10037] Operation already in progress. |
| 10038 | [10038] Socket operation on nonsocket. |
| 10039 | [10039] Destination address required. |
| 10040 | [10040] Message is too long. |
| 10041 | [10041] Protocol wrong type for socket. |
| 10042 | [10042] Bad protocol option. |
| 10043 | [10043] Protocol is not supported. |
| 10044 | [10044] Socket type is not supported. |
| 10045 | [10045] Operation is not supported on socket. |
| 10046 | [10046] Protocol family is not supported. |
| 10047 | [10047] Address family is not supported by protocol family. |
| 10048 | [10048] Address already in use. |
| 10049 | [10049] Cannot assign requested address. |
| 10050 | [10050] Network is down. |
| 10051 | [10051] Network is unreachable. |
| 10052 | [10052] Net dropped connection or reset. |
| 10053 | [10053] Software caused connection abort. |
| 10054 | [10054] Connection reset by peer. |
| 10055 | [10055] No buffer space available. |
| 10056 | [10056] Socket is already connected. |
| 10057 | [10057] Socket is not connected. |
| 10058 | [10058] Cannot send after socket shutdown. |
| 10059 | [10059] Too many references, cannot splice. |
| 10060 | [10060] Connection timed out. |
| 10061 | [10061] Connection refused. |
| 10062 | [10062] Too many levels of symbolic links. |
| 10063 | [10063] File name is too long. |
| 10064 | [10064] Host is down. |
| 10065 | [10065] No route to host. |
| 10066 | [10066] Directory is not empty |
| 10067 | [10067] Too many processes. |
| 10068 | [10068] Too many users. |
| 10069 | [10069] Disc Quota Exceeded. |
| 10070 | [10070] Stale NFS file handle. |
| 10071 | [10071] Too many levels of remote in path. |
| 10091 | [10091] Network subsystem is unavailable. |
| 10092 | [10092] WINSOCK DLL Version out of range. |
| 10093 | [10093] Winsock is not loaded yet. |
| 11001 | [11001] Host not found. |
| 11002 | [11002] Nonauthoritative 'Host not found' (try again or check DNS setup). |
| 11003 | [11003] Nonrecoverable errors: FORMERR, REFUSED, NOTIMP. |
| 11004 | [11004] Valid name, no data record (check DNS setup). |