SSHClient Component

Properties Methods Events Configuration Settings Errors

The SSHClient component implements a fully functional, open-ended SSH client.

Syntax

nsoftware.IPWorksSSH.Sshclient

Remarks

The SSHClient component can be used to perform any number of tasks secured by the Secure Shell (SSH) protocol. First set SSHHost, SSHUser and either SSHPassword or SSHCert , then call SSHLogon to establish a secure connection.

To open channels, use OpenChannel. To open a channel to tunnel data to a remote machine, call OpenTcpIpChannel. The Channels property contains a list of all of the channels open for the current instance of the component.

Once a "session" channel has been opened, you can call StartService to initialize a service on that channel. If you are using a "shell" service, you can call OpenTerminal to establish a pseudo-terminal for formatting the data output from the shell.

Data received from the server will be fired through SSHChannelData events. Any requests received can be processed through the SSHChannelRequest 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.


Channels	A collection of currently open channels.
Connected	Triggers a connection or disconnection.
Firewall	A set of properties related to firewall access.
LocalHost	The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
LocalPort	The TCP port in the local host where IPPort binds.
SSHAcceptServerHostKey	Instructs the component to accept the server host key that matches the supplied key.
SSHAuthMode	The authentication method to be used the component when calling SSHLogon .
SSHCert	A certificate to be used for authenticating the SSHUser .
SSHCompressionAlgorithms	A comma-separated list containing all allowable compression algorithms.
SSHEncryptionAlgorithms	A comma-separated list containing all allowable compression algorithms.
SSHHost	The address of the SSH host.
SSHKeyExchangeAlgorithms	A comma-separated list containing all allowable key exchange algorithms.
SSHMacAlgorithms	A comma-separated list containing all allowable message authentication algorithms.
SSHPassword	The password for SSH password-based authentication.
SSHPort	The port on the SSH server where the SSH service is running; by default, 22.
SSHPublicKeyAlgorithms	A comma-separated list containing all allowable public key authentication algorithms.
SSHUser	The username for SSH authentication.
Timeout	A 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.


CloseChannel	Closes a existing SSHChannel .
Config	Sets or retrieves a configuration setting .
DecodePacket	Decodes a hex-encoded SSH packet.
DoEvents	Processes events from the internal message queue.
EncodePacket	Hex encodes an SSH packet.
ExchangeKeys	Causes the component to exchange a new set of session keys with the SSHHost .
GetSSHParam	Used to read a field from an SSH packet's payload.
GetSSHParamBytes	Used to read a field from an SSH packet's payload.
OpenChannel	Opens a new SSHChannel .
OpenTcpIpChannel	Opens a special TCP/IP tunneling SSHChannel .
OpenTerminal	Creates a pseudo-terminal to be used to help display data for a channel.
SendChannelData	Used to send regular data over an SSH channel.
SendSSHPacket	Used to send an encoded SSH packet to a connected client.
SetSSHParam	Used to write a field to the end of a payload.
SSHLogoff	Logoff from the SSH server.
SSHLogon	Logon to the SSHHost using the current SSHUser and SSHPassword .
StartService	Requests the given service on a target channel.

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	Fired immediately after a connection completes (or fails).
ConnectionStatus	Fired to indicate changes in connection state.
Disconnected	Fired when a connection is closed.
Error	Information about errors during data delivery.
SSHChannelClosed	Fired when a channel is closed.
SSHChannelData	Fired when the SSHHost sends channel data to the client.
SSHChannelEOF	Fired when the remote peer signals the end of the data stream for the channel.
SSHChannelOpened	Fired when a channel is successfully opened.
SSHChannelOpenRequest	Fired when a host attempts to open a new channel.
SSHChannelReadyToSend	Fired when the component is ready to send data.
SSHChannelRequest	Fired when the SSHHost sends a channel request to the client.
SSHChannelRequested	Fired if the SSHChannelRequest was successful, any further processing for the channel request should be done here.
SSHCustomAuth	Fired when the component is doing custom authentication.
SSHKeyboardInteractive	Fired when the component receives a request for user input from the server.
SSHServerAuthentication	Fired after the server presents its public key to the client.
SSHStatus	Shows the progress of the secure connection.

Configuration Settings

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


ClientSSHVersionString	The SSH version string used by the component.
SignedSSHCert	The CA signed client public key used when authenticating.
SSHAcceptServerCAKey	The CA public key that signed the server's host key.
SSHAcceptAnyServerHostKey	If set the component will accept any key presented by the server.
SSHAcceptServerHostKeyFingerPrint	The fingerprint of the server key to accept.
SSHKeyExchangeAlgorithms	Specifies the supported key exchange algorithms.
SSHMacAlgorithms	Specifies the supported Mac algorithms.
SSHKeyRenegotiate	Causes the component to renegotiate the SSH keys.
KeyRenegotiationThreshold	Sets the threshold for the SSH Key Renegotiation.
KerberosRealm	The fully qualified domain name of the Kerberos Realm to use for GSSAPI authentication.
KerberosDelegation	If true, asks for credentials with delegation enabled during authentication.
KerberosSPN	The Kerberos Service Principal Name of the SSH host.
LogSSHPackets	If true, detailed SSH packet logging is performed.
MaxPacketSize	The maximum packet size of the channel, in bytes.
MaxWindowSize	The maximum window size allowed for the channel, in bytes.
PreferredDHGroupBits	The size (in bits) of the preferred modulus (p) to request from the server.
ConnectionTimeout	Sets a separate timeout value for establishing a connection.
FirewallAutoDetect	Tells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHost	Name or IP address of firewall (optional).
FirewallPassword	Password to be used if authentication is to be used when connecting through the firewall.
FirewallPort	The TCP port for the FirewallHost;.
FirewallType	Determines the type of firewall to connect through.
FirewallUser	A user name if authentication is to be used connecting through a firewall.
KeepAliveTime	The inactivity time in milliseconds before a TCP keep-alive packet is sent.
KeepAliveInterval	The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
Linger	When set to True, connections are terminated gracefully.
LingerTime	Time in seconds to have the connection linger.
LocalHost	The name of the local host through which connections are initiated or accepted.
LocalPort	The TCP port in the local host where the component binds.
MaxLineLength	The maximum amount of data to accumulate when no EOL is found.
MaxTransferRate	The transfer rate limit in bytes per second.
RecordLength	The length of received data records.
TCPKeepAlive	Determines whether or not the keep alive socket option is enabled.
UseIPv6	Whether to use IPv6.
TcpNoDelay	Whether or not to delay when sending packets.
AbsoluteTimeout	Determines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallData	Used to send extra data to the firewall.
InBufferSize	The size in bytes of the incoming queue of the socket.
OutBufferSize	The size in bytes of the outgoing queue of the socket.
CodePage	The system code page used for Unicode to Multibyte translations.