SSHServer Class

Properties   Methods   Events   Config Settings   Errors  

The SSHServer class is used to create Secure Shell (SSH) servers. The class handles multiple simultaneous connections on the same Transmission Control Protocol (TCP)/IP port (service port). It is designed to balance the load between connections for a fast, powerful server.

Syntax

SSHServer

Remarks

The SSHServer class is the Secure Shell (SSH)-enabled equivalent of the IPWorks TCPServer class, extended by a set of new properties and events that deal with SSH security. The SSHCompressionAlgorithms and SSHEncryptionAlgorithms properties determine which protocols are enabled for the SSH handshake. The SSHCert* properties are used to select a certificate for the server (note that a valid certificate must be selected before the server can function). The SSHUserAuthRequest event will allow you to use authenticate clients using digital certificates or passwords. Finally, the SSHStatus event provides information about the SSH handshake and underlying protocol notifications.

By default, each instance of SSHServer can handle up to 1000 simultaneous incoming connections (this number may be increased up to 100,000, or decreased to a lower value by using the MaxConnections configuration setting).

SSH connections are identified by a ConnectionId. Events relating to these connections as a whole will use the ConnectionId to identify the specific connection. Connections may also contain one or more multiplexed channels, which are identified by a ChannelId. Channel-level events will specify the ChannelId to which they relate.

SSHServer can start to listen on a port by setting the Listening property to True. When a remote host asks for a connection, the ConnectionRequest event is fired. At that point, the connection can either be accepted or rejected. If the connection is accepted, a ConnectionId is assigned, and communication can start. From this point on, the operation is similar to SSHClient. Data can be sent to an individual SSHChannel using SendChannelData. The address and port of the incoming connection can be found by querying the RemoteHost and RemotePort properties.

Note: Server components are designed to process events as they occur. To ensure that events are processed in a timely manner, DoEvents should be called in a loop after the server is started.

Property List


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

ChannelsA collection of currently open channels.
ConnectionBacklogThis property includes the maximum number of pending connections maintained by the Transmission Control Protocol (TCP)/IP subsystem.
ConnectionsA collection of currently connected SSH clients.
DefaultAuthMethodsSpecifies the supported authentication methods.
DefaultIdleTimeoutThis property includes the default idle timeout for inactive clients.
DefaultTimeoutAn initial timeout value to be used by incoming connections.
KeyboardInteractiveMessageThe instructions to send to the client during keyboard-interactive authentication.
KeyboardInteractivePromptsA collection of prompts to present to the user for keyboard-interactive authentication.
ListeningThis property indicates whether the class is listening for incoming connections on LocalPort.
LocalHostThis property includes the name of the local host or user-assigned IP interface through which connections are initiated or accepted.
LocalPortThe TCP port in the local host where the class listens.
SSHCertA certificate to be used during SSH negotiation.
SSHCompressionAlgorithmsA comma-separated list containing all allowable compression algorithms.
SSHEncryptionAlgorithmsA comma-separated list containing all allowable encryption algorithms.

Method List


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

ChangeRecordLengthChanges the length of received data records.
CloseChannelCloses a existing SSHChannel .
ConfigSets or retrieves a configuration setting.
DisconnectThis method disconnects the specified client.
DoEventsThis method processes events from the internal message queue.
ExchangeKeysCauses the class to exchange a new set of session keys on the specified connection.
GetSSHParamUsed to read a field from an SSH packet's payload.
GetSSHParamBytesUsed to read a field from an SSH packet's payload.
OpenChannelOpens a new SSHChannel .
ResetThis method will reset the class.
SendBytesSends binary data to the specified channel.
SendChannelDataUsed to send data over an SSH channel.
SendSSHPacketUsed to send an encoded SSH packet to the server.
SendTextSends text to the specified channel.
SetSSHParamUsed to write a field to the end of a payload.
ShutdownThis method shuts down the server.
StartListeningThis method starts listening for incoming connections.
StopListeningThis method stops listening for new connections.

Event List


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

ConnectedThis event is fired immediately after a connection completes (or fails).
ConnectionRequestThis event is fired when a request for connection comes from a remote host.
DisconnectedThis event is fired when a connection is closed.
ErrorInformation about errors during data delivery.
LogFires once for each log message.
SSHChannelClosedFired when a channel is closed.
SSHChannelDataInFired when data is received on an SSH channel.
SSHChannelEOFFired when the remote peer signals the end of the data stream for the channel.
SSHChannelOpenedFired when a channel is successfully opened.
SSHChannelOpenRequestFired when a client attempts to open a new channel.
SSHChannelReadyToSendFired when the class is ready to send data.
SSHChannelRequestFired when the SSHHost sends a channel request to the client.
SSHChannelRequestedFired if the SSHChannelRequest was successful, any further processing for the channel request should be done here.
SSHServiceRequestFired when a client requests a service to be started.
SSHStatusShows the progress of the secure connection.
SSHTunnelClosedThis event will fire when a connected client attempts to close a tunnel.
SSHTunnelRequestedThis event fires when a connected client attempts to establish a forward or reverse tunnel.
SSHUserAuthRequestFires when a client attempts to authenticate a connection.

Config Settings


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

AltSSHCertCountThe number of records in the AltSSHCert configuration settings.
AltSSHCertStore[i]The name of the certificate store.
AltSSHCertStorePassword[i]The password used to open the certificate store.
AltSSHCertStoreType[i]The type of certificate store.
AltSSHCertSubject[i]The alternative certificate subject.
ClientSSHVersionString[ConnectionId]The client's version string.
FireAuthRequestAfterSigWhether to fire an informational event after the public key signature has been verified.
KeyboardInteractivePrompts[ConnectionId]Specifies custom keyboard-interactive prompts for particular connections.
KeyRenegotiationThresholdSets the threshold for the SSH Key Renegotiation.
LogLevelSpecifies the level of detail that is logged.
MaxAuthAttemptsThe maximum authentication attempts allowed before forcing a disconnect.
NegotiatedStrictKex[ConnectionId]Returns whether strict key exchange was negotiated to be used.
ServerSSHVersionStringThe SSH version string sent to connecting clients.
SSHKeepAliveCountMaxThe maximum number of keep alive packets to send without a response.
SSHKeepAliveIntervalThe interval between keep alive packets.
SSHKeyExchangeAlgorithmsSpecifies the supported key exchange algorithms.
SSHMacAlgorithmsSpecifies the supported Mac algorithms.
SSHPubKeyAuthSigAlgorithmsSpecifies the allowed signature algorithms used by a client performing public key authentication.
SSHPublicKeyAlgorithmsSpecifies the supported public key algorithms for the server's public key.
SSHVersionPatternThe pattern used to match the remote host's version string.
UserAuthBanner[ConnectionId]A custom user authentication banner.
UseStrictKeyExchangeSpecifies how strict key exchange is supported.
AllowedClientsA comma-separated list of host names or IP addresses that can access the class.
BindExclusivelyWhether or not the class considers a local port reserved for exclusive use.
BlockedClientsA comma-separated list of host names or IP addresses that cannot access the class.
ConnectionUIDThe unique connectionId for a connection.
DefaultConnectionTimeoutThe inactivity timeout applied to the SSL handshake.
InBufferSizeThe size in bytes of the incoming queue of the socket.
KeepAliveIntervalThe retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
KeepAliveRetryCountThe number of keep-alive packets to be sent before the remotehost is considered disconnected.
KeepAliveTimeThe inactivity time in milliseconds before a TCP keep-alive packet is sent.
MaxConnectionsThe maximum number of connections available.
MaxReadTimeThe maximum time spent reading data from each connection.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.
TcpNoDelayWhether or not to delay when sending packets.
UseIOCPWhether to use the completion port I/O model.
UseIPv6Whether to use IPv6.
UseWindowsMessagesWhether to use the WSAAsyncSelect I/O model.
BuildInfoInformation about the product's build.
CodePageThe system code page used for Unicode to Multibyte translations.
LicenseInfoInformation about the current license.
MaskSensitiveDataWhether sensitive data is masked in log messages.
ProcessIdleEventsWhether the class uses its internal event loop to process events when the main thread is idle.
SelectWaitMillisThe length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.
UseFIPSCompliantAPITells the class whether or not to use FIPS certified APIs.
UseInternalSecurityAPIWhether or not to use the system security libraries or an internal implementation.

Channels Property (SSHServer Class)

A collection of currently open channels.

Syntax

int ipworksssh_sshserver_getsshchannelcount(void* lpObj);
int ipworksssh_sshserver_getbytessent(void* lpObj, int sshchannelid);
char* ipworksssh_sshserver_getchanneleol(void* lpObj, int sshchannelid);
int ipworksssh_sshserver_setchanneleol(void* lpObj, int sshchannelid, const char* lpszChannelEOL);
char* ipworksssh_sshserver_getchannelid(void* lpObj, int sshchannelid);
int ipworksssh_sshserver_getmaxchannellength(void* lpObj, int sshchannelid);
int ipworksssh_sshserver_setmaxchannellength(void* lpObj, int sshchannelid, int iMaxChannelLength);
int ipworksssh_sshserver_getreadytosend(void* lpObj, int sshchannelid);
int ipworksssh_sshserver_getrecordlength(void* lpObj, int sshchannelid);
char* ipworksssh_sshserver_getservice(void* lpObj, int sshchannelid);
int GetSSHChannelCount();

int GetBytesSent(int iSSHChannelId);

QString GetChannelEOL(int iSSHChannelId);
int SetChannelEOL(int iSSHChannelId, QString qsChannelEOL); QString GetChannelId(int iSSHChannelId); int GetMaxChannelLength(int iSSHChannelId);
int SetMaxChannelLength(int iSSHChannelId, int iMaxChannelLength); bool GetReadyToSend(int iSSHChannelId); int GetRecordLength(int iSSHChannelId); QString GetService(int iSSHChannelId);

Remarks

The SSH 2.0 specification allows for multiple channels to be opened over a single TCP/IP connection. The Channels property represents the channels that are currently open. A new SSHChannel can be opened with OpenChannel.

This collection is a hashtable where the channel's Id string is used as the key to the desired SSH channel object.

Example (Sending Data to a Channel)

This property is read-only.

Data Type

IPWorksSSHSSHChannel

ConnectionBacklog Property (SSHServer Class)

This property includes the maximum number of pending connections maintained by the Transmission Control Protocol (TCP)/IP subsystem.

Syntax

ANSI (Cross Platform)
int GetConnectionBacklog();
int SetConnectionBacklog(int iConnectionBacklog); Unicode (Windows) INT GetConnectionBacklog();
INT SetConnectionBacklog(INT iConnectionBacklog);
int ipworksssh_sshserver_getconnectionbacklog(void* lpObj);
int ipworksssh_sshserver_setconnectionbacklog(void* lpObj, int iConnectionBacklog);
int GetConnectionBacklog();
int SetConnectionBacklog(int iConnectionBacklog);

Default Value

5

Remarks

This property contains the maximum number of pending connections maintained by the TCP/IP subsystem. This value reflects the SOMAXCONN option for the main listening socket. The default value for most systems is 5. You may set this property to a larger value if the server is expected to receive a large number of connections, and queuing them is desirable.

This property is not available at design time.

Data Type

Integer

Connections Property (SSHServer Class)

A collection of currently connected SSH clients.

Syntax

int ipworksssh_sshserver_getsshconnectioncount(void* lpObj);
int ipworksssh_sshserver_getsshconnectionconnected(void* lpObj, int connectionid);
char* ipworksssh_sshserver_getsshconnectionlocaladdress(void* lpObj, int connectionid);
char* ipworksssh_sshserver_getsshconnectionremotehost(void* lpObj, int connectionid);
int ipworksssh_sshserver_getsshconnectionremoteport(void* lpObj, int connectionid);
int ipworksssh_sshserver_getsshconnectiontimeout(void* lpObj, int connectionid);
int ipworksssh_sshserver_setsshconnectiontimeout(void* lpObj, int connectionid, int iSSHConnectionTimeout);
int GetSSHConnectionCount();

bool GetSSHConnectionConnected(int iConnectionId);

QString GetSSHConnectionLocalAddress(int iConnectionId);

QString GetSSHConnectionRemoteHost(int iConnectionId);

int GetSSHConnectionRemotePort(int iConnectionId);

int GetSSHConnectionTimeout(int iConnectionId);
int SetSSHConnectionTimeout(int iConnectionId, int iSSHConnectionTimeout);

Remarks

This property is a collection of currently connected clients. All of the connections may be managed using this property. Each connection is described by the different fields of the SSHConnection type.

This collection is a hashtable type of collection, in which the connection Id string is used as the key to the desired connection. You may acquire the key for a given connection through the Connected event.

This property is read-only.

Data Type

IPWorksSSHSSHConnection

DefaultAuthMethods Property (SSHServer Class)

Specifies the supported authentication methods.

Syntax

ANSI (Cross Platform)
char* GetDefaultAuthMethods();
int SetDefaultAuthMethods(const char* lpszDefaultAuthMethods); Unicode (Windows) LPWSTR GetDefaultAuthMethods();
INT SetDefaultAuthMethods(LPCWSTR lpszDefaultAuthMethods);
char* ipworksssh_sshserver_getdefaultauthmethods(void* lpObj);
int ipworksssh_sshserver_setdefaultauthmethods(void* lpObj, const char* lpszDefaultAuthMethods);
QString GetDefaultAuthMethods();
int SetDefaultAuthMethods(QString qsDefaultAuthMethods);

Default Value

"password,publickey"

Remarks

This property specifies the supported authentication methods. The client will choose one of the supported mechanisms when authenticating to the class.

This must be a comma separated list of values. For more information on authenticating clients see the SSHUserAuthRequest event.

The following is a list of methods implemented by the class:

noneThis authentication method is used by most SSH clients to obtain the list of authentication methods available for the user's account. In most cases you should not accept a request using this authentication method.
passwordAuthParam will contain the user-supplied password. If the password is correct, set Accept to true.
publickeyAuthParam will contain an SSH2 public key blob. If the user's public key is acceptable, set Accept or PartialSuccess to true. The class will then handle verifying the digital signature and will respond to the client accordingly.
keyboard-interactiveSSHUserAuthRequest will fire multiple times for keyboard-interactive authentication: It will fire once for each response sent by the client in the SSH_MSG_USERAUTH_INFO_RESPONSE packet (one for each prompt specified by the daemon). The index of each response will be specified as a suffix in AuthMethod, with AuthParam containing the response to the corresponding prompt (e.g keyboard-interactive-1, keyboard-interactive-2 and so on). Finally, SSHUserAuthRequest will fire one last time with AuthMethod set to "keyboard-interactive" and AuthParam set to an empty string. The daemon must set Accept to true every time to allow the authentication process to succeed.

Data Type

String

DefaultIdleTimeout Property (SSHServer Class)

This property includes the default idle timeout for inactive clients.

Syntax

ANSI (Cross Platform)
int GetDefaultIdleTimeout();
int SetDefaultIdleTimeout(int iDefaultIdleTimeout); Unicode (Windows) INT GetDefaultIdleTimeout();
INT SetDefaultIdleTimeout(INT iDefaultIdleTimeout);
int ipworksssh_sshserver_getdefaultidletimeout(void* lpObj);
int ipworksssh_sshserver_setdefaultidletimeout(void* lpObj, int iDefaultIdleTimeout);
int GetDefaultIdleTimeout();
int SetDefaultIdleTimeout(int iDefaultIdleTimeout);

Default Value

0

Remarks

This property specifies the idle timeout (in seconds) for clients. When set to a positive value, the class will disconnect idle clients after the specified timeout.

This applies only to clients that have not sent or received data within DefaultIdleTimeout seconds.

If set to 0 (default), no idle timeout is applied.

Note: DoEvents must be called for the class to check existing connections.

Data Type

Integer

DefaultTimeout Property (SSHServer Class)

An initial timeout value to be used by incoming connections.

Syntax

ANSI (Cross Platform)
int GetDefaultTimeout();
int SetDefaultTimeout(int iDefaultTimeout); Unicode (Windows) INT GetDefaultTimeout();
INT SetDefaultTimeout(INT iDefaultTimeout);
int ipworksssh_sshserver_getdefaulttimeout(void* lpObj);
int ipworksssh_sshserver_setdefaulttimeout(void* lpObj, int iDefaultTimeout);
int GetDefaultTimeout();
int SetDefaultTimeout(int iDefaultTimeout);

Default Value

60

Remarks

This property is used by the class to set the operational timeout value of all inbound connections once they are established. If the timeout is set to 0, all inbound connections will behave asynchronously. The default value is 60, meaning the class will behave synchronously.

Data Type

Integer

KeyboardInteractiveMessage Property (SSHServer Class)

The instructions to send to the client during keyboard-interactive authentication.

Syntax

ANSI (Cross Platform)
char* GetKeyboardInteractiveMessage();
int SetKeyboardInteractiveMessage(const char* lpszKeyboardInteractiveMessage); Unicode (Windows) LPWSTR GetKeyboardInteractiveMessage();
INT SetKeyboardInteractiveMessage(LPCWSTR lpszKeyboardInteractiveMessage);
char* ipworksssh_sshserver_getkeyboardinteractivemessage(void* lpObj);
int ipworksssh_sshserver_setkeyboardinteractivemessage(void* lpObj, const char* lpszKeyboardInteractiveMessage);
QString GetKeyboardInteractiveMessage();
int SetKeyboardInteractiveMessage(QString qsKeyboardInteractiveMessage);

Default Value

""

Remarks

This property should be set to the main instructions to send to the client during keyboard-interactive authentication.

Data Type

String

KeyboardInteractivePrompts Property (SSHServer Class)

A collection of prompts to present to the user for keyboard-interactive authentication.

Syntax

IPWorksSSHList<IPWorksSSHSSHPrompt>* GetKeyboardInteractivePrompts();
int SetKeyboardInteractivePrompts(IPWorksSSHList<IPWorksSSHSSHPrompt>* val);
int ipworksssh_sshserver_getkeyboardinteractivepromptcount(void* lpObj);
int ipworksssh_sshserver_setkeyboardinteractivepromptcount(void* lpObj, int iKeyboardInteractivePromptCount);
int ipworksssh_sshserver_getkeyboardinteractivepromptecho(void* lpObj, int promptindex);
int ipworksssh_sshserver_setkeyboardinteractivepromptecho(void* lpObj, int promptindex, int bKeyboardInteractivePromptEcho);
char* ipworksssh_sshserver_getkeyboardinteractivepromptprompt(void* lpObj, int promptindex);
int ipworksssh_sshserver_setkeyboardinteractivepromptprompt(void* lpObj, int promptindex, const char* lpszKeyboardInteractivePromptPrompt);
int GetKeyboardInteractivePromptCount();
int SetKeyboardInteractivePromptCount(int iKeyboardInteractivePromptCount); bool GetKeyboardInteractivePromptEcho(int iPromptIndex);
int SetKeyboardInteractivePromptEcho(int iPromptIndex, bool bKeyboardInteractivePromptEcho); QString GetKeyboardInteractivePromptPrompt(int iPromptIndex);
int SetKeyboardInteractivePromptPrompt(int iPromptIndex, QString qsKeyboardInteractivePromptPrompt);

Remarks

This property is a collection of prompts to present to the user during keyboard-authentication. It is used together with the KeyboardInteractiveMessage property.

Data Type

IPWorksSSHSSHPrompt

Listening Property (SSHServer Class)

This property indicates whether the class is listening for incoming connections on LocalPort.

Syntax

ANSI (Cross Platform)
int GetListening();

Unicode (Windows)
BOOL GetListening();
int ipworksssh_sshserver_getlistening(void* lpObj);
bool GetListening();

Default Value

FALSE

Remarks

This property indicates whether the class is listening for connections on the port specified by the LocalPort property. Use the StartListening and StopListening methods to control whether the class is listening.

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

Data Type

Boolean

LocalHost Property (SSHServer Class)

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

Syntax

ANSI (Cross Platform)
char* GetLocalHost();
int SetLocalHost(const char* lpszLocalHost); Unicode (Windows) LPWSTR GetLocalHost();
INT SetLocalHost(LPCWSTR lpszLocalHost);
char* ipworksssh_sshserver_getlocalhost(void* lpObj);
int ipworksssh_sshserver_setlocalhost(void* lpObj, const char* lpszLocalHost);
QString GetLocalHost();
int SetLocalHost(QString qsLocalHost);

Default Value

""

Remarks

The LocalHost 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 class initiate connections (or accept in the case of server classs) 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 class 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.

Data Type

String

LocalPort Property (SSHServer Class)

The TCP port in the local host where the class listens.

Syntax

ANSI (Cross Platform)
int GetLocalPort();
int SetLocalPort(int iLocalPort); Unicode (Windows) INT GetLocalPort();
INT SetLocalPort(INT iLocalPort);
int ipworksssh_sshserver_getlocalport(void* lpObj);
int ipworksssh_sshserver_setlocalport(void* lpObj, int iLocalPort);
int GetLocalPort();
int SetLocalPort(int iLocalPort);

Default Value

22

Remarks

The LocalPort property must be set before TCPServer starts listening. If its value is 0, then the TCP/IP subsystem picks a port number at random. The port number can be found by checking the value of the LocalPort property after TCPServer is in listening mode (after successfully assigning True to the Listening property).

The service port is not shared among servers (i.e. there can be only one TCPServer 'listening' on a particular port at one time).

Data Type

Integer

SSHCert Property (SSHServer Class)

A certificate to be used during SSH negotiation.

Syntax

IPWorksSSHCertificate* GetSSHCert();
int SetSSHCert(IPWorksSSHCertificate* val);
char* ipworksssh_sshserver_getsshcerteffectivedate(void* lpObj);
char* ipworksssh_sshserver_getsshcertexpirationdate(void* lpObj);
char* ipworksssh_sshserver_getsshcertextendedkeyusage(void* lpObj);
char* ipworksssh_sshserver_getsshcertfingerprint(void* lpObj);
char* ipworksssh_sshserver_getsshcertfingerprintsha1(void* lpObj);
char* ipworksssh_sshserver_getsshcertfingerprintsha256(void* lpObj);
char* ipworksssh_sshserver_getsshcertissuer(void* lpObj);
char* ipworksssh_sshserver_getsshcertprivatekey(void* lpObj);
int ipworksssh_sshserver_getsshcertprivatekeyavailable(void* lpObj);
char* ipworksssh_sshserver_getsshcertprivatekeycontainer(void* lpObj);
char* ipworksssh_sshserver_getsshcertpublickey(void* lpObj);
char* ipworksssh_sshserver_getsshcertpublickeyalgorithm(void* lpObj);
int ipworksssh_sshserver_getsshcertpublickeylength(void* lpObj);
char* ipworksssh_sshserver_getsshcertserialnumber(void* lpObj);
char* ipworksssh_sshserver_getsshcertsignaturealgorithm(void* lpObj);
int ipworksssh_sshserver_getsshcertstore(void* lpObj, char** lpSSHCertStore, int* lenSSHCertStore);
int ipworksssh_sshserver_setsshcertstore(void* lpObj, const char* lpSSHCertStore, int lenSSHCertStore);
char* ipworksssh_sshserver_getsshcertstorepassword(void* lpObj);
int ipworksssh_sshserver_setsshcertstorepassword(void* lpObj, const char* lpszSSHCertStorePassword);
int ipworksssh_sshserver_getsshcertstoretype(void* lpObj);
int ipworksssh_sshserver_setsshcertstoretype(void* lpObj, int iSSHCertStoreType);
char* ipworksssh_sshserver_getsshcertsubjectaltnames(void* lpObj);
char* ipworksssh_sshserver_getsshcertthumbprintmd5(void* lpObj);
char* ipworksssh_sshserver_getsshcertthumbprintsha1(void* lpObj);
char* ipworksssh_sshserver_getsshcertthumbprintsha256(void* lpObj);
char* ipworksssh_sshserver_getsshcertusage(void* lpObj);
int ipworksssh_sshserver_getsshcertusageflags(void* lpObj);
char* ipworksssh_sshserver_getsshcertversion(void* lpObj);
char* ipworksssh_sshserver_getsshcertsubject(void* lpObj);
int ipworksssh_sshserver_setsshcertsubject(void* lpObj, const char* lpszSSHCertSubject);
int ipworksssh_sshserver_getsshcertencoded(void* lpObj, char** lpSSHCertEncoded, int* lenSSHCertEncoded);
int ipworksssh_sshserver_setsshcertencoded(void* lpObj, const char* lpSSHCertEncoded, int lenSSHCertEncoded);
QString GetSSHCertEffectiveDate();

QString GetSSHCertExpirationDate();

QString GetSSHCertExtendedKeyUsage();

QString GetSSHCertFingerprint();

QString GetSSHCertFingerprintSHA1();

QString GetSSHCertFingerprintSHA256();

QString GetSSHCertIssuer();

QString GetSSHCertPrivateKey();

bool GetSSHCertPrivateKeyAvailable();

QString GetSSHCertPrivateKeyContainer();

QString GetSSHCertPublicKey();

QString GetSSHCertPublicKeyAlgorithm();

int GetSSHCertPublicKeyLength();

QString GetSSHCertSerialNumber();

QString GetSSHCertSignatureAlgorithm();

QByteArray GetSSHCertStore();
int SetSSHCertStore(QByteArray qbaSSHCertStore); QString GetSSHCertStorePassword();
int SetSSHCertStorePassword(QString qsSSHCertStorePassword); int GetSSHCertStoreType();
int SetSSHCertStoreType(int iSSHCertStoreType); QString GetSSHCertSubjectAltNames(); QString GetSSHCertThumbprintMD5(); QString GetSSHCertThumbprintSHA1(); QString GetSSHCertThumbprintSHA256(); QString GetSSHCertUsage(); int GetSSHCertUsageFlags(); QString GetSSHCertVersion(); QString GetSSHCertSubject();
int SetSSHCertSubject(QString qsSSHCertSubject); QByteArray GetSSHCertEncoded();
int SetSSHCertEncoded(QByteArray qbaSSHCertEncoded);

Remarks

The digital certificate that the server will use during SSH negotiation. A certificate with a private key is required for session authentication and encryption.

This is the server's certificate, and must be set prior to setting Listening to True.

Data Type

IPWorksSSHCertificate

SSHCompressionAlgorithms Property (SSHServer Class)

A comma-separated list containing all allowable compression algorithms.

Syntax

ANSI (Cross Platform)
char* GetSSHCompressionAlgorithms();
int SetSSHCompressionAlgorithms(const char* lpszSSHCompressionAlgorithms); Unicode (Windows) LPWSTR GetSSHCompressionAlgorithms();
INT SetSSHCompressionAlgorithms(LPCWSTR lpszSSHCompressionAlgorithms);
char* ipworksssh_sshserver_getsshcompressionalgorithms(void* lpObj);
int ipworksssh_sshserver_setsshcompressionalgorithms(void* lpObj, const char* lpszSSHCompressionAlgorithms);
QString GetSSHCompressionAlgorithms();
int SetSSHCompressionAlgorithms(QString qsSSHCompressionAlgorithms);

Default Value

"none,zlib"

Remarks

During the 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, so it is important to list multiple algorithms in preferential order. If no algorithm can be agreed upon, the class 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 class:

  • zlib
  • zlib@openssh.com
  • none

Data Type

String

SSHEncryptionAlgorithms Property (SSHServer Class)

A comma-separated list containing all allowable encryption algorithms.

Syntax

ANSI (Cross Platform)
char* GetSSHEncryptionAlgorithms();
int SetSSHEncryptionAlgorithms(const char* lpszSSHEncryptionAlgorithms); Unicode (Windows) LPWSTR GetSSHEncryptionAlgorithms();
INT SetSSHEncryptionAlgorithms(LPCWSTR lpszSSHEncryptionAlgorithms);
char* ipworksssh_sshserver_getsshencryptionalgorithms(void* lpObj);
int ipworksssh_sshserver_setsshencryptionalgorithms(void* lpObj, const char* lpszSSHEncryptionAlgorithms);
QString GetSSHEncryptionAlgorithms();
int SetSSHEncryptionAlgorithms(QString qsSSHEncryptionAlgorithms);

Default Value

"aes256-ctr,aes192-ctr,aes128-ctr,3des-ctr,arcfour256,arcfour128,arcfour,aes256-gcm@openssh.com,aes128-gcm@openssh.com,chacha20-poly1305@openssh.com"

Remarks

During the 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, so it is important to list multiple algorithms in preferential order. If no algorithm can be agreed upon, the class 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 class:

aes256-ctr256-bit AES encryption in CTR mode
aes256-cbc256-bit AES encryption in CBC mode
aes192-ctr192-bit AES encryption in CTR mode
aes192-cbc192-bit AES encryption in CBC mode
aes128-ctr128-bit AES encryption in CTR mode
aes128-cbc128-bit AES encryption in CBC mode
3des-ctr192-bit (3-key) triple DES encryption in CTR mode
3des-cbc192-bit (3-key) triple DES encryption in CBC mode
cast128-cbcCAST-128 encryption
blowfish-cbcBlowfish encryption
arcfourARC4 encryption
arcfour128128-bit ARC4 encryption
arcfour256256-bit ARC4 encryption
aes256-gcm@openssh.com256-bit AES encryption in GCM mode.
aes128-gcm@openssh.com128-bit AES encryption in GCM mode.
chacha20-poly1305@openssh.comChaCha20 with Poly1305-AES encryption.

Data Type

String

ChangeRecordLength Method (SSHServer Class)

Changes the length of received data records.

Syntax

ANSI (Cross Platform)
int ChangeRecordLength(int iChannelId, int iRecordLength);

Unicode (Windows)
INT ChangeRecordLength(INT iChannelId, INT iRecordLength);
int ipworksssh_sshserver_changerecordlength(void* lpObj, int iChannelId, int iRecordLength);
int ChangeRecordLength(int iChannelId, int iRecordLength);

Remarks

This method defines the length of data records to be received (in bytes) for the specified ChannelId.

If RecordLength is set to a positive value, the class will accumulate data until RecordLength bytes of data is received and only then fire the SSHChannelDataIn event with data of length RecordLength. This allows data to be received as records of known length. This method can be called at any time to change the record length, including within the DataIn event.

A value of 0 (default) means this functionality is not used.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

CloseChannel Method (SSHServer Class)

Closes a existing SSHChannel .

Syntax

ANSI (Cross Platform)
int CloseChannel(int iChannelId);

Unicode (Windows)
INT CloseChannel(INT iChannelId);
int ipworksssh_sshserver_closechannel(void* lpObj, int iChannelId);
int CloseChannel(int iChannelId);

Remarks

ChannelId is the identifier for the SSH channel to be closed.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Config Method (SSHServer Class)

Sets or retrieves a configuration setting.

Syntax

ANSI (Cross Platform)
char* Config(const char* lpszConfigurationString);

Unicode (Windows)
LPWSTR Config(LPCWSTR lpszConfigurationString);
char* ipworksssh_sshserver_config(void* lpObj, const char* lpszConfigurationString);
QString Config(const QString& qsConfigurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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, you must call Config("PROPERTY"). The value will be returned as a string.

Error Handling (C++)

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

Disconnect Method (SSHServer Class)

This method disconnects the specified client.

Syntax

ANSI (Cross Platform)
int Disconnect(int iConnectionId);

Unicode (Windows)
INT Disconnect(INT iConnectionId);
int ipworksssh_sshserver_disconnect(void* lpObj, int iConnectionId);
int Disconnect(int iConnectionId);

Remarks

Calling this method will disconnect the client specified by the ConnectionId parameter.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

DoEvents Method (SSHServer Class)

This method processes events from the internal message queue.

Syntax

ANSI (Cross Platform)
int DoEvents();

Unicode (Windows)
INT DoEvents();
int ipworksssh_sshserver_doevents(void* lpObj);
int DoEvents();

Remarks

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

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

ExchangeKeys Method (SSHServer Class)

Causes the class to exchange a new set of session keys on the specified connection.

Syntax

ANSI (Cross Platform)
int ExchangeKeys(int iConnectionId);

Unicode (Windows)
INT ExchangeKeys(INT iConnectionId);
int ipworksssh_sshserver_exchangekeys(void* lpObj, int iConnectionId);
int ExchangeKeys(int iConnectionId);

Remarks

SSH key renegotiation can be initiated by either end of an established SSH connection. ExchangeKeys allows the server to start such a renegotiation with the client. During this process, SSHStatus events will fire containing updates regarding the key negotiation process.

The SSH 2.0 specification recommends that key renegotiation be done once for 2 gigabytes (GB) of data processed by the connection, or once every day. This makes it more difficult to break the security of data-intensive or long-lived connections.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

GetSSHParam Method (SSHServer Class)

Used to read a field from an SSH packet's payload.

Syntax

ANSI (Cross Platform)
char* GetSSHParam(const char* lpPayload, int lenPayload, const char* lpszField);

Unicode (Windows)
LPWSTR GetSSHParam(LPCSTR lpPayload, INT lenPayload, LPCWSTR lpszField);
char* ipworksssh_sshserver_getsshparam(void* lpObj, const char* lpPayload, int lenPayload, const char* lpszField);
QString GetSSHParam(QByteArray qbaPayload, const QString& qsField);

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 request.
WantsReply (boolean)Whether or not the client wants a reply to the request.

The remaining fields that are available in the payload are dependent upon 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 (eg: "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 (eg: "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 (eg: "sftp").

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. 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.

Error Handling (C++)

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

GetSSHParamBytes Method (SSHServer Class)

Used to read a field from an SSH packet's payload.

Syntax

ANSI (Cross Platform)
char* GetSSHParamBytes(const char* lpPayload, int lenPayload, const char* lpszField, int *lpSize = NULL);

Unicode (Windows)
LPSTR GetSSHParamBytes(LPCSTR lpPayload, INT lenPayload, LPCWSTR lpszField, LPINT lpSize = NULL);
char* ipworksssh_sshserver_getsshparambytes(void* lpObj, const char* lpPayload, int lenPayload, const char* lpszField, int *lpSize);
QByteArray GetSSHParamBytes(QByteArray qbaPayload, const QString& qsField);

Remarks

This method is the same as calling GetSSHParam, but returns raw bytes instead of strings.

Error Handling (C++)

This method returns a Binary String value (with length lpSize); after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

OpenChannel Method (SSHServer Class)

Opens a new SSHChannel .

Syntax

ANSI (Cross Platform)
char* OpenChannel(int iConnectionId, const char* lpszChannelType);

Unicode (Windows)
LPWSTR OpenChannel(INT iConnectionId, LPCWSTR lpszChannelType);
char* ipworksssh_sshserver_openchannel(void* lpObj, int iConnectionId, const char* lpszChannelType);
QString OpenChannel(int iConnectionId, const QString& qsChannelType);

Remarks

The SSH 2.0 specification allows for multiple channels to be opened over a single TCP/IP connection. The Channels property represents the channels that are currently open. A new SSHChannel can be opened with OpenChannel.

ChannelType represents the type of SSH channel to be opened. The most common type of channel is "session".

If the call to OpenChannel succeeds, an SSHChannel will be created and added to the Channels collection.

Error Handling (C++)

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

Reset Method (SSHServer Class)

This method will reset the class.

Syntax

ANSI (Cross Platform)
int Reset();

Unicode (Windows)
INT Reset();
int ipworksssh_sshserver_reset(void* lpObj);
int Reset();

Remarks

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

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendBytes Method (SSHServer Class)

Sends binary data to the specified channel.

Syntax

ANSI (Cross Platform)
int SendBytes(int iChannelId, const char* lpData, int lenData);

Unicode (Windows)
INT SendBytes(INT iChannelId, LPCSTR lpData, INT lenData);
int ipworksssh_sshserver_sendbytes(void* lpObj, int iChannelId, const char* lpData, int lenData);
int SendBytes(int iChannelId, QByteArray qbaData);

Remarks

This method sends binary data to the channel identified by ChannelId. To send text use the SendText method instead.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendChannelData Method (SSHServer Class)

Used to send data over an SSH channel.

Syntax

ANSI (Cross Platform)
int SendChannelData(int iChannelId, const char* lpData, int lenData);

Unicode (Windows)
INT SendChannelData(INT iChannelId, LPCSTR lpData, INT lenData);
int ipworksssh_sshserver_sendchanneldata(void* lpObj, int iChannelId, const char* lpData, int lenData);
int SendChannelData(int iChannelId, QByteArray qbaData);

Remarks

This method can be used to send arbitrary data to the channel with the specified ChannelId.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendSSHPacket Method (SSHServer Class)

Used to send an encoded SSH packet to the server.

Syntax

ANSI (Cross Platform)
int SendSSHPacket(int iChannelId, int iPacketType, const char* lpPayload, int lenPayload);

Unicode (Windows)
INT SendSSHPacket(INT iChannelId, INT iPacketType, LPCSTR lpPayload, INT lenPayload);
int ipworksssh_sshserver_sendsshpacket(void* lpObj, int iChannelId, int iPacketType, const char* lpPayload, int lenPayload);
int SendSSHPacket(int iChannelId, int iPacketType, QByteArray qbaPayload);

Remarks

This method can be used to send a previously built SSH payload to the server. ChannelId identifies the channel that will receive the packet.

PacketType identifies what kind of packet is to be sent. Payload should contain the payload of the packet, which can be built by successive calls to SetSSHParam.

When SendSSHPacket is called, the class will finish building the packet, encrypt it for transport, and send it to the server.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SendText Method (SSHServer Class)

Sends text to the specified channel.

Syntax

ANSI (Cross Platform)
int SendText(int iChannelId, const char* lpszText);

Unicode (Windows)
INT SendText(INT iChannelId, LPCWSTR lpszText);
int ipworksssh_sshserver_sendtext(void* lpObj, int iChannelId, const char* lpszText);
int SendText(int iChannelId, const QString& qsText);

Remarks

This method sends text to the client identified by ChannelId. To send binary data use the SendBytes method instead.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

SetSSHParam Method (SSHServer Class)

Used to write a field to the end of a payload.

Syntax

ANSI (Cross Platform)
char* SetSSHParam(const char* lpPayload, int lenPayload, const char* lpszFieldType, const char* lpszFieldValue, int *lpSize = NULL);

Unicode (Windows)
LPSTR SetSSHParam(LPCSTR lpPayload, INT lenPayload, LPCWSTR lpszFieldType, LPCWSTR lpszFieldValue, LPINT lpSize = NULL);
char* ipworksssh_sshserver_setsshparam(void* lpObj, const char* lpPayload, int lenPayload, const char* lpszFieldType, const char* lpszFieldValue, int *lpSize);
QByteArray SetSSHParam(QByteArray qbaPayload, const QString& qsFieldType, const QString& qsFieldValue);

Remarks

This method is used to build the payload portion of an 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:

sA plaintext string containing the default system encoding of the data.
sbA string containing the hex encoded data. (eg: "A1B23C")
mA variable-length large integer, encoded as a textual representation of the value ("1234").
iA 32-bit integer, encoded as a textual representation of the value (eg: "1234").
lA 64-bit integer, encoded as a textual representation of the value (eg: "1234").
bA single byte, encoded as a textual representation of the value (eg: "123").
fA boolean flag, encoded as a textual representation of the value (eg: 'true' or 'false')

Note: integer values may be encoded in hexadecimal by prefixing "0x" to the beginning of the string, otherwise the value is assumed to be base-10.

Error Handling (C++)

This method returns a Binary String value (with length lpSize); after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

Shutdown Method (SSHServer Class)

This method shuts down the server.

Syntax

ANSI (Cross Platform)
int Shutdown();

Unicode (Windows)
INT Shutdown();
int ipworksssh_sshserver_shutdown(void* lpObj);
int Shutdown();

Remarks

This method shuts down the server. Calling this method is equivalent to calling StopListening and then breaking every client connection by calling Disconnect.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

StartListening Method (SSHServer Class)

This method starts listening for incoming connections.

Syntax

ANSI (Cross Platform)
int StartListening();

Unicode (Windows)
INT StartListening();
int ipworksssh_sshserver_startlistening(void* lpObj);
int StartListening();

Remarks

This method begins listening for incoming connections on the port specified by LocalPort. Once listening, events will fire as new clients connect and data are transferred.

To stop listening for new connections, call StopListening. To stop listening for new connections and to disconnect all existing clients, call Shutdown.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

StopListening Method (SSHServer Class)

This method stops listening for new connections.

Syntax

ANSI (Cross Platform)
int StopListening();

Unicode (Windows)
INT StopListening();
int ipworksssh_sshserver_stoplistening(void* lpObj);
int StopListening();

Remarks

This method stops listening for new connections. After being called, any new connection attempts will be rejected. Calling this method does not disconnect existing connections.

To stop listening and to disconnect all existing clients, call Shutdown instead.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Connected Event (SSHServer Class)

This event is fired immediately after a connection completes (or fails).

Syntax

ANSI (Cross Platform)
virtual int FireConnected(SSHServerConnectedEventParams *e);
typedef struct {
int ConnectionId;
int StatusCode;
const char *Description;
int CertStoreType;
char *CertStore;
char *CertPassword;
char *CertSubject; int reserved; } SSHServerConnectedEventParams;
Unicode (Windows) virtual INT FireConnected(SSHServerConnectedEventParams *e);
typedef struct {
INT ConnectionId;
INT StatusCode;
LPCWSTR Description;
INT CertStoreType;
LPWSTR CertStore;
LPWSTR CertPassword;
LPWSTR CertSubject; INT reserved; } SSHServerConnectedEventParams;
#define EID_SSHSERVER_CONNECTED 1

virtual INT IPWORKSSSH_CALL FireConnected(INT &iConnectionId, INT &iStatusCode, LPSTR &lpszDescription, INT &iCertStoreType, LPSTR &lpszCertStore, LPSTR &lpszCertPassword, LPSTR &lpszCertSubject);
class SSHServerConnectedEventParams {
public:
  int ConnectionId();

  int StatusCode();

  const QString &Description();

  int CertStoreType();
  void SetCertStoreType(int iCertStoreType);

  const QString &CertStore();
  void SetCertStore(const QString &qsCertStore);

  const QString &CertPassword();
  void SetCertPassword(const QString &qsCertPassword);

  const QString &CertSubject();
  void SetCertSubject(const QString &qsCertSubject);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Connected(SSHServerConnectedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireConnected(SSHServerConnectedEventParams *e) {...}

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 system. Description contains a description of this code. The value of StatusCode is equal to the value of the system error.

Please refer to the Error Codes section for more information.

ConnectionId is the connection Id of the client requesting the connection.

CertStoreType is the store type of the alternate certificate to use for this connection. The class supports both public and private keys in a variety of formats. When the cstAuto value is used, the class will automatically determine the type. This field can take one of the following values:

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, the necessary data must first be collected using the CertMgr class. The ListStoreCertificates method may be called after setting CertStoreType to cstPKCS11, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use.

When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN.

Code Example. SSH Authentication with Security Key: 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);

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.

CertStore is the store name or location of the alternate certificate to use for this connection.

Designations of certificate stores are platform dependent.

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

MYA certificate store holding personal certificates with their associated private keys.
CACertifying authority certificates.
ROOTRoot certificates.

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

CertPassword is the password of the certificate store containing the alternate certificate to use for this connection.

CertSubject is the subject of the alternate certificate to use for this connection.

The special value * matches any subject and will select the first certificate in the 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=support@nsoftware.com". Common fields and their meanings are as follows:

FieldMeaning
CNCommon Name. This is commonly a hostname like www.server.com.
OOrganization
OUOrganizational Unit
LLocality
SState
CCountry
EEmail Address

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

ConnectionRequest Event (SSHServer Class)

This event is fired when a request for connection comes from a remote host.

Syntax

ANSI (Cross Platform)
virtual int FireConnectionRequest(SSHServerConnectionRequestEventParams *e);
typedef struct {
const char *Address;
int Port;
int Accept; int reserved; } SSHServerConnectionRequestEventParams;
Unicode (Windows) virtual INT FireConnectionRequest(SSHServerConnectionRequestEventParams *e);
typedef struct {
LPCWSTR Address;
INT Port;
BOOL Accept; INT reserved; } SSHServerConnectionRequestEventParams;
#define EID_SSHSERVER_CONNECTIONREQUEST 2

virtual INT IPWORKSSSH_CALL FireConnectionRequest(LPSTR &lpszAddress, INT &iPort, BOOL &bAccept);
class SSHServerConnectionRequestEventParams {
public:
  const QString &Address();

  int Port();

  bool Accept();
  void SetAccept(bool bAccept);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void ConnectionRequest(SSHServerConnectionRequestEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireConnectionRequest(SSHServerConnectionRequestEventParams *e) {...}

Remarks

This event indicates an incoming connection. The connection is accepted by default. Address and Port will contain information about the remote host requesting the inbound connection. If you want to refuse it, you can set the Accept parameter to False.

Disconnected Event (SSHServer Class)

This event is fired when a connection is closed.

Syntax

ANSI (Cross Platform)
virtual int FireDisconnected(SSHServerDisconnectedEventParams *e);
typedef struct {
int ConnectionId;
int StatusCode;
const char *Description; int reserved; } SSHServerDisconnectedEventParams;
Unicode (Windows) virtual INT FireDisconnected(SSHServerDisconnectedEventParams *e);
typedef struct {
INT ConnectionId;
INT StatusCode;
LPCWSTR Description; INT reserved; } SSHServerDisconnectedEventParams;
#define EID_SSHSERVER_DISCONNECTED 3

virtual INT IPWORKSSSH_CALL FireDisconnected(INT &iConnectionId, INT &iStatusCode, LPSTR &lpszDescription);
class SSHServerDisconnectedEventParams {
public:
  int ConnectionId();

  int StatusCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Disconnected(SSHServerDisconnectedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireDisconnected(SSHServerDisconnectedEventParams *e) {...}

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 system. Description contains a description of this code. The value of StatusCode is equal to the value of the system error.

Please refer to the Error Codes section for more information.

Error Event (SSHServer Class)

Information about errors during data delivery.

Syntax

ANSI (Cross Platform)
virtual int FireError(SSHServerErrorEventParams *e);
typedef struct {
int ConnectionId;
int ErrorCode;
const char *Description; int reserved; } SSHServerErrorEventParams;
Unicode (Windows) virtual INT FireError(SSHServerErrorEventParams *e);
typedef struct {
INT ConnectionId;
INT ErrorCode;
LPCWSTR Description; INT reserved; } SSHServerErrorEventParams;
#define EID_SSHSERVER_ERROR 4

virtual INT IPWORKSSSH_CALL FireError(INT &iConnectionId, INT &iErrorCode, LPSTR &lpszDescription);
class SSHServerErrorEventParams {
public:
  int ConnectionId();

  int ErrorCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Error(SSHServerErrorEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireError(SSHServerErrorEventParams *e) {...}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.

ConnectionId 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 section.

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 section.

Log Event (SSHServer Class)

Fires once for each log message.

Syntax

ANSI (Cross Platform)
virtual int FireLog(SSHServerLogEventParams *e);
typedef struct {
int ConnectionId;
int LogLevel;
const char *Message;
const char *LogType; int reserved; } SSHServerLogEventParams;
Unicode (Windows) virtual INT FireLog(SSHServerLogEventParams *e);
typedef struct {
INT ConnectionId;
INT LogLevel;
LPCWSTR Message;
LPCWSTR LogType; INT reserved; } SSHServerLogEventParams;
#define EID_SSHSERVER_LOG 5

virtual INT IPWORKSSSH_CALL FireLog(INT &iConnectionId, INT &iLogLevel, LPSTR &lpszMessage, LPSTR &lpszLogType);
class SSHServerLogEventParams {
public:
  int ConnectionId();

  int LogLevel();

  const QString &Message();

  const QString &LogType();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Log(SSHServerLogEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireLog(SSHServerLogEventParams *e) {...}

Remarks

This event fires once for each log messages generated by the class. The verbosity is controlled by the LogLevel setting.

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

0 (None) No messages are logged.
1 (Info - Default) Informational events such as SSH handshake messages are logged.
2 (Verbose) Detailed data such as individual packet information is 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.

ConnectionId specifies the connection to which the log message is applicable.

SSHChannelClosed Event (SSHServer Class)

Fired when a channel is closed.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelClosed(SSHServerSSHChannelClosedEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId; int reserved; } SSHServerSSHChannelClosedEventParams;
Unicode (Windows) virtual INT FireSSHChannelClosed(SSHServerSSHChannelClosedEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId; INT reserved; } SSHServerSSHChannelClosedEventParams;
#define EID_SSHSERVER_SSHCHANNELCLOSED 6

virtual INT IPWORKSSSH_CALL FireSSHChannelClosed(INT &iConnectionId, INT &iChannelId);
class SSHServerSSHChannelClosedEventParams {
public:
  int ConnectionId();

  int ChannelId();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelClosed(SSHServerSSHChannelClosedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelClosed(SSHServerSSHChannelClosedEventParams *e) {...}

Remarks

The SSHChannelClosed event is fired when a channel is closed on an SSH connection.

ConnectionId identifies the connection. ChannelId identifies the channel.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHChannelDataIn Event (SSHServer Class)

Fired when data is received on an SSH channel.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelDataIn(SSHServerSSHChannelDataInEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId;
const char *Data; int lenData; int reserved; } SSHServerSSHChannelDataInEventParams;
Unicode (Windows) virtual INT FireSSHChannelDataIn(SSHServerSSHChannelDataInEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId;
LPCSTR Data; INT lenData; INT reserved; } SSHServerSSHChannelDataInEventParams;
#define EID_SSHSERVER_SSHCHANNELDATAIN 7

virtual INT IPWORKSSSH_CALL FireSSHChannelDataIn(INT &iConnectionId, INT &iChannelId, LPSTR &lpData, INT &lenData);
class SSHServerSSHChannelDataInEventParams {
public:
  int ConnectionId();

  int ChannelId();

  const QByteArray &Data();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelDataIn(SSHServerSSHChannelDataInEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelDataIn(SSHServerSSHChannelDataInEventParams *e) {...}

Remarks

Whenever a client sends data to an SSH channel, the SSHChannelDataIn event will fire. ChannelId will identify the channel receiving data. Data will contain the raw data being received.

ConnectionId identifies the connection. ChannelId identifies the channel.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHChannelEOF Event (SSHServer Class)

Fired when the remote peer signals the end of the data stream for the channel.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelEOF(SSHServerSSHChannelEOFEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId; int reserved; } SSHServerSSHChannelEOFEventParams;
Unicode (Windows) virtual INT FireSSHChannelEOF(SSHServerSSHChannelEOFEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId; INT reserved; } SSHServerSSHChannelEOFEventParams;
#define EID_SSHSERVER_SSHCHANNELEOF 8

virtual INT IPWORKSSSH_CALL FireSSHChannelEOF(INT &iConnectionId, INT &iChannelId);
class SSHServerSSHChannelEOFEventParams {
public:
  int ConnectionId();

  int ChannelId();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelEOF(SSHServerSSHChannelEOFEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelEOF(SSHServerSSHChannelEOFEventParams *e) {...}

Remarks

The SSHChannelEOF event is fired when the end of the data stream for a channel on an SSH connection is reached.

ConnectionId identifies the connection. ChannelId identifies the channel.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHChannelOpened Event (SSHServer Class)

Fired when a channel is successfully opened.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelOpened(SSHServerSSHChannelOpenedEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId; int reserved; } SSHServerSSHChannelOpenedEventParams;
Unicode (Windows) virtual INT FireSSHChannelOpened(SSHServerSSHChannelOpenedEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId; INT reserved; } SSHServerSSHChannelOpenedEventParams;
#define EID_SSHSERVER_SSHCHANNELOPENED 9

virtual INT IPWORKSSSH_CALL FireSSHChannelOpened(INT &iConnectionId, INT &iChannelId);
class SSHServerSSHChannelOpenedEventParams {
public:
  int ConnectionId();

  int ChannelId();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelOpened(SSHServerSSHChannelOpenedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelOpened(SSHServerSSHChannelOpenedEventParams *e) {...}

Remarks

The SSHChannelOpened event is fired when a channel is successfully opened on an SSH connection.

ConnectionId identifies the connection. ChannelId identifies the channel.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHChannelOpenRequest Event (SSHServer Class)

Fired when a client attempts to open a new channel.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelOpenRequest(SSHServerSSHChannelOpenRequestEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId;
const char *Service;
const char *Parameters; int lenParameters;
int Accept; int reserved; } SSHServerSSHChannelOpenRequestEventParams;
Unicode (Windows) virtual INT FireSSHChannelOpenRequest(SSHServerSSHChannelOpenRequestEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId;
LPCWSTR Service;
LPCSTR Parameters; INT lenParameters;
BOOL Accept; INT reserved; } SSHServerSSHChannelOpenRequestEventParams;
#define EID_SSHSERVER_SSHCHANNELOPENREQUEST 10

virtual INT IPWORKSSSH_CALL FireSSHChannelOpenRequest(INT &iConnectionId, INT &iChannelId, LPSTR &lpszService, LPSTR &lpParameters, INT &lenParameters, BOOL &bAccept);
class SSHServerSSHChannelOpenRequestEventParams {
public:
  int ConnectionId();

  int ChannelId();

  const QString &Service();

  const QByteArray &Parameters();

  bool Accept();
  void SetAccept(bool bAccept);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelOpenRequest(SSHServerSSHChannelOpenRequestEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelOpenRequest(SSHServerSSHChannelOpenRequestEventParams *e) {...}

Remarks

This event is fired whenever a client attempts to open a new channel for a given connection. ChannelId will contain the id of the channel to be created. Service will identify the type of channel that is being requested (e.g.: "session"). Set Accept to true to accept the channel open request.

ConnectionId identifies the connection. ChannelId identifies the channel.

If the channel open request contains extra information, it will be contained in Parameters; you can extract data from it using GetSSHParam and GetSSHParamBytes. The most common example of a request with parameters would be a request with Service set to "direct-tcpip" (for SSH tunneling); in that case Parameters will contain the host to connect (string), the port to connect (int), the originator IP address (string) and the originator TCP port (int).

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHChannelReadyToSend Event (SSHServer Class)

Fired when the class is ready to send data.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelReadyToSend(SSHServerSSHChannelReadyToSendEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId; int reserved; } SSHServerSSHChannelReadyToSendEventParams;
Unicode (Windows) virtual INT FireSSHChannelReadyToSend(SSHServerSSHChannelReadyToSendEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId; INT reserved; } SSHServerSSHChannelReadyToSendEventParams;
#define EID_SSHSERVER_SSHCHANNELREADYTOSEND 11

virtual INT IPWORKSSSH_CALL FireSSHChannelReadyToSend(INT &iConnectionId, INT &iChannelId);
class SSHServerSSHChannelReadyToSendEventParams {
public:
  int ConnectionId();

  int ChannelId();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelReadyToSend(SSHServerSSHChannelReadyToSendEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelReadyToSend(SSHServerSSHChannelReadyToSendEventParams *e) {...}

Remarks

This event fires when data can be sent over the SSH Channel specified by ChannelId for the connection specified by ConnectionId.

When a channel is opened this event will fire once the channel is ready and data can be sent.

When Timeout is set to 0 (asynchronous) sending data may result in an error if the channel or underlying socket cannot accept more data to send. Monitor SSHChannelReadyToSend or ReadyToSend to determine when data can be sent again.

When Timeout is set to a positive value the class will block when sending data until the data can be successfully sent and SSHChannelReadyToSend and ReadyToSend do not need to be monitored.

SSHChannelRequest Event (SSHServer Class)

Fired when the SSHHost sends a channel request to the client.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelRequest(SSHServerSSHChannelRequestEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId;
const char *RequestType;
const char *Packet; int lenPacket;
int Success; int reserved; } SSHServerSSHChannelRequestEventParams;
Unicode (Windows) virtual INT FireSSHChannelRequest(SSHServerSSHChannelRequestEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId;
LPCWSTR RequestType;
LPCSTR Packet; INT lenPacket;
BOOL Success; INT reserved; } SSHServerSSHChannelRequestEventParams;
#define EID_SSHSERVER_SSHCHANNELREQUEST 12

virtual INT IPWORKSSSH_CALL FireSSHChannelRequest(INT &iConnectionId, INT &iChannelId, LPSTR &lpszRequestType, LPSTR &lpPacket, INT &lenPacket, BOOL &bSuccess);
class SSHServerSSHChannelRequestEventParams {
public:
  int ConnectionId();

  int ChannelId();

  const QString &RequestType();

  const QByteArray &Packet();

  bool Success();
  void SetSuccess(bool bSuccess);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelRequest(SSHServerSSHChannelRequestEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelRequest(SSHServerSSHChannelRequestEventParams *e) {...}

Remarks

The SSHHost may send requests that affect the status of a particular SSHChannel. Some requests will be automatically handled by the class. However, others may need the attention of the user to be dealt with properly within the scope of the application.

ConnectionId identifies the connection.

ChannelId identifies the channel receiving the request.

Type will contain the type of the request. These types are dependent upon the type of the channel. For example, a "session" channel executing a command on the remote shell may receive an "exit-status" request containing the return code of that command.

RequestData contains the remainder of the original SSH packet. If the request type has specific parameters, they can be parsed out of this data.

Success should be used to instruct the class to respond to the request with either a success or failure notification. If the request is successful, SSHChannelRequested will fire with the same information in case the request requires further processing.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHChannelRequested Event (SSHServer Class)

Fired if the SSHChannelRequest was successful, any further processing for the channel request should be done here.

Syntax

ANSI (Cross Platform)
virtual int FireSSHChannelRequested(SSHServerSSHChannelRequestedEventParams *e);
typedef struct {
int ConnectionId;
int ChannelId;
const char *RequestType;
const char *Packet; int lenPacket; int reserved; } SSHServerSSHChannelRequestedEventParams;
Unicode (Windows) virtual INT FireSSHChannelRequested(SSHServerSSHChannelRequestedEventParams *e);
typedef struct {
INT ConnectionId;
INT ChannelId;
LPCWSTR RequestType;
LPCSTR Packet; INT lenPacket; INT reserved; } SSHServerSSHChannelRequestedEventParams;
#define EID_SSHSERVER_SSHCHANNELREQUESTED 13

virtual INT IPWORKSSSH_CALL FireSSHChannelRequested(INT &iConnectionId, INT &iChannelId, LPSTR &lpszRequestType, LPSTR &lpPacket, INT &lenPacket);
class SSHServerSSHChannelRequestedEventParams {
public:
  int ConnectionId();

  int ChannelId();

  const QString &RequestType();

  const QByteArray &Packet();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHChannelRequested(SSHServerSSHChannelRequestedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHChannelRequested(SSHServerSSHChannelRequestedEventParams *e) {...}

Remarks

The SSHHost may send requests that affect the status of a particular SSHChannel. Some requests will be automatically handled by the class. However, others may need the attention of the user to be dealt with properly within the scope of the application.

ConnectionId identifies the connection.

ChannelId identifies the channel receiving the request.

Type will contain the type of the request. These types are dependent upon the type of the channel. For example, a "session" channel executing a command on the remote shell may receive an "exit-status" request containing the return code of that command.

RequestData contains the remainder of the original SSH packet. If the request type has specific parameters, they can be parsed out of this data.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHServiceRequest Event (SSHServer Class)

Fired when a client requests a service to be started.

Syntax

ANSI (Cross Platform)
virtual int FireSSHServiceRequest(SSHServerSSHServiceRequestEventParams *e);
typedef struct {
int ConnectionId;
const char *Service;
int Accept; int reserved; } SSHServerSSHServiceRequestEventParams;
Unicode (Windows) virtual INT FireSSHServiceRequest(SSHServerSSHServiceRequestEventParams *e);
typedef struct {
INT ConnectionId;
LPCWSTR Service;
BOOL Accept; INT reserved; } SSHServerSSHServiceRequestEventParams;
#define EID_SSHSERVER_SSHSERVICEREQUEST 14

virtual INT IPWORKSSSH_CALL FireSSHServiceRequest(INT &iConnectionId, LPSTR &lpszService, BOOL &bAccept);
class SSHServerSSHServiceRequestEventParams {
public:
  int ConnectionId();

  const QString &Service();

  bool Accept();
  void SetAccept(bool bAccept);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHServiceRequest(SSHServerSSHServiceRequestEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHServiceRequest(SSHServerSSHServiceRequestEventParams *e) {...}

Remarks

The SSHServiceRequest event is fired when a client requests that a service be started for a particular connection, identified by ConnectionId. Service will be the name of the service the client wishes to start. If the connection is authenticated and the user has access to the service, set Accept to true to allow the SSHServer to accept the request.

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

SSHStatus Event (SSHServer Class)

Shows the progress of the secure connection.

Syntax

ANSI (Cross Platform)
virtual int FireSSHStatus(SSHServerSSHStatusEventParams *e);
typedef struct {
int ConnectionId;
const char *Message; int reserved; } SSHServerSSHStatusEventParams;
Unicode (Windows) virtual INT FireSSHStatus(SSHServerSSHStatusEventParams *e);
typedef struct {
INT ConnectionId;
LPCWSTR Message; INT reserved; } SSHServerSSHStatusEventParams;
#define EID_SSHSERVER_SSHSTATUS 15

virtual INT IPWORKSSSH_CALL FireSSHStatus(INT &iConnectionId, LPSTR &lpszMessage);
class SSHServerSSHStatusEventParams {
public:
  int ConnectionId();

  const QString &Message();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHStatus(SSHServerSSHStatusEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHStatus(SSHServerSSHStatusEventParams *e) {...}

Remarks

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

SSHTunnelClosed Event (SSHServer Class)

This event will fire when a connected client attempts to close a tunnel.

Syntax

ANSI (Cross Platform)
virtual int FireSSHTunnelClosed(SSHServerSSHTunnelClosedEventParams *e);
typedef struct {
int ConnectionId;
const char *Address;
int Port; int reserved; } SSHServerSSHTunnelClosedEventParams;
Unicode (Windows) virtual INT FireSSHTunnelClosed(SSHServerSSHTunnelClosedEventParams *e);
typedef struct {
INT ConnectionId;
LPCWSTR Address;
INT Port; INT reserved; } SSHServerSSHTunnelClosedEventParams;
#define EID_SSHSERVER_SSHTUNNELCLOSED 16

virtual INT IPWORKSSSH_CALL FireSSHTunnelClosed(INT &iConnectionId, LPSTR &lpszAddress, INT &iPort);
class SSHServerSSHTunnelClosedEventParams {
public:
  int ConnectionId();

  const QString &Address();

  int Port();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHTunnelClosed(SSHServerSSHTunnelClosedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHTunnelClosed(SSHServerSSHTunnelClosedEventParams *e) {...}

Remarks

This event fires when the connected client attempts to close a forward or reverse tunnel.

SSHTunnelRequested Event (SSHServer Class)

This event fires when a connected client attempts to establish a forward or reverse tunnel.

Syntax

ANSI (Cross Platform)
virtual int FireSSHTunnelRequested(SSHServerSSHTunnelRequestedEventParams *e);
typedef struct {
int ConnectionId;
int Direction;
const char *Address;
int Port;
int Accept; int reserved; } SSHServerSSHTunnelRequestedEventParams;
Unicode (Windows) virtual INT FireSSHTunnelRequested(SSHServerSSHTunnelRequestedEventParams *e);
typedef struct {
INT ConnectionId;
INT Direction;
LPCWSTR Address;
INT Port;
BOOL Accept; INT reserved; } SSHServerSSHTunnelRequestedEventParams;
#define EID_SSHSERVER_SSHTUNNELREQUESTED 17

virtual INT IPWORKSSSH_CALL FireSSHTunnelRequested(INT &iConnectionId, INT &iDirection, LPSTR &lpszAddress, INT &iPort, BOOL &bAccept);
class SSHServerSSHTunnelRequestedEventParams {
public:
  int ConnectionId();

  int Direction();

  const QString &Address();

  int Port();
  void SetPort(int iPort);

  bool Accept();
  void SetAccept(bool bAccept);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHTunnelRequested(SSHServerSSHTunnelRequestedEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHTunnelRequested(SSHServerSSHTunnelRequestedEventParams *e) {...}

Remarks

This event fires when the connected client attempts to establish a forward or reverse tunnel. A forward tunnel, after being established, will forward all traffic from the client to a specified hostname and port. A reverse tunnel, after being established, will listen for incoming traffic on the same machine where SSHServer is running and any data received on that port will be forwarded to the client who requested the reverse tunnel.

SSHUserAuthRequest Event (SSHServer Class)

Fires when a client attempts to authenticate a connection.

Syntax

ANSI (Cross Platform)
virtual int FireSSHUserAuthRequest(SSHServerSSHUserAuthRequestEventParams *e);
typedef struct {
int ConnectionId;
const char *User;
const char *Service;
const char *AuthMethod;
const char *AuthParam;
int Accept;
int PartialSuccess;
char *AvailableMethods;
const char *KeyAlgorithm; int reserved; } SSHServerSSHUserAuthRequestEventParams;
Unicode (Windows) virtual INT FireSSHUserAuthRequest(SSHServerSSHUserAuthRequestEventParams *e);
typedef struct {
INT ConnectionId;
LPCWSTR User;
LPCWSTR Service;
LPCWSTR AuthMethod;
LPCWSTR AuthParam;
BOOL Accept;
BOOL PartialSuccess;
LPWSTR AvailableMethods;
LPCWSTR KeyAlgorithm; INT reserved; } SSHServerSSHUserAuthRequestEventParams;
#define EID_SSHSERVER_SSHUSERAUTHREQUEST 18

virtual INT IPWORKSSSH_CALL FireSSHUserAuthRequest(INT &iConnectionId, LPSTR &lpszUser, LPSTR &lpszService, LPSTR &lpszAuthMethod, LPSTR &lpszAuthParam, BOOL &bAccept, BOOL &bPartialSuccess, LPSTR &lpszAvailableMethods, LPSTR &lpszKeyAlgorithm);
class SSHServerSSHUserAuthRequestEventParams {
public:
  int ConnectionId();

  const QString &User();

  const QString &Service();

  const QString &AuthMethod();

  const QString &AuthParam();

  bool Accept();
  void SetAccept(bool bAccept);

  bool PartialSuccess();
  void SetPartialSuccess(bool bPartialSuccess);

  const QString &AvailableMethods();
  void SetAvailableMethods(const QString &qsAvailableMethods);

  const QString &KeyAlgorithm();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void SSHUserAuthRequest(SSHServerSSHUserAuthRequestEventParams *e);
// Or, subclass SSHServer and override this emitter function. virtual int FireSSHUserAuthRequest(SSHServerSSHUserAuthRequestEventParams *e) {...}

Remarks

The SSHUserAuthRequest event fires when an SSH client attempts to authenticate itself on a particular connection. ConnectionId will identify the connection being authenticated. User will be the name of the account requesting authentication, and Service will contain the name of the service the client is wishing to access.

AuthMethod will denote which method the client is attempting to use to authenticate itself. AuthParam will contain the value of the authentication token used by the client. If the token is acceptable, you may set Accept to true to allow the class to authenticate the client. If it is not, set Accept to false.

Connecting clients will initially attempt authentication with an AuthMethod of "none". This is done with the expectation that the request will fail and the server will send a list of supported methods back to the client. In your implementation check the AuthMethod parameter, if it is "none" you should set AvailableMethods and reject the request. The client will select one of the available methods and re-authenticate.

You may set AvailableMethods to a comma-delimited string of authentication methods that are available for the user. This list will be sent back to the client so that it may perform further authentication attempts.

The following is a list of methods implemented by the class:

noneThis authentication method is used by most SSH clients to obtain the list of authentication methods available for the user's account. In most cases you should not accept a request using this authentication method.
passwordAuthParam will contain the user-supplied password. If the password is correct, set Accept to true.
publickeyAuthParam will contain an SSH2 public key blob. If the user's public key is acceptable, set Accept or PartialSuccess to true. The class will then handle verifying the digital signature and will respond to the client accordingly.
keyboard-interactiveSSHUserAuthRequest will fire multiple times for keyboard-interactive authentication: It will fire once for each response sent by the client in the SSH_MSG_USERAUTH_INFO_RESPONSE packet (one for each prompt specified by the daemon). The index of each response will be specified as a suffix in AuthMethod, with AuthParam containing the response to the corresponding prompt (e.g keyboard-interactive-1, keyboard-interactive-2 and so on). Finally, SSHUserAuthRequest will fire one last time with AuthMethod set to "keyboard-interactive" and AuthParam set to an empty string. The daemon must set Accept to true every time to allow the authentication process to succeed.

The PartialSuccess parameter is only used when multi-factor authentication is needed. To implement multi-factor authentication when this event fires first verify the AuthParam for the given AuthMethod. If accepted, set PartialSuccess to true and Accept to false. The client should then send the authentication request for a different form of authentication specified in AvailableMethods. You may continue to set PartialSuccess to true until all authentication requirements are satisfied. Once all requirements are satisfied set Accept to true.

KeyAlgorithm hold the signing algorithm used when the client attempts public key authentication. Possible values are:

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

Note: Processing long-running requests, including sending channel data, inside this event may cause the underlying transport to stop processing SSH data until the event returns. In order to prevent this from happening, all requests should be processed asynchronously in a separate thread outside of this event.

Certificate Type

This is the digital certificate being used.

Syntax

IPWorksSSHCertificate (declared in ipworksssh.h)

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.

Fields

EffectiveDate
char* (read-only)

Default Value: ""

This is 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
char* (read-only)

Default Value: ""

This is the date 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
char* (read-only)

Default Value: ""

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

Fingerprint
char* (read-only)

Default Value: ""

This is 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
char* (read-only)

Default Value: ""

This is 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
char* (read-only)

Default Value: ""

This is 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
char* (read-only)

Default Value: ""

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

PrivateKey
char* (read-only)

Default Value: ""

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

Note: The PrivateKey may be available but not exportable. In this case, PrivateKey returns an empty string.

PrivateKeyAvailable
int (read-only)

Default Value: FALSE

This field shows whether a PrivateKey is available for the selected certificate. If PrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

PrivateKeyContainer
char* (read-only)

Default Value: ""

This is the name of the PrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

PublicKey
char* (read-only)

Default Value: ""

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

PublicKeyAlgorithm
char* (read-only)

Default Value: ""

This field contains 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 Value: 0

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

SerialNumber
char* (read-only)

Default Value: ""

This is 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
char* (read-only)

Default Value: ""

The field contains 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
char*

Default Value: "MY"

This is the name of the certificate store for the client certificate.

The StoreType field denotes the type of the certificate store specified by Store. If the store is password protected, specify the password in StorePassword.

Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the 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:

MYA certificate store holding personal certificates with their associated private keys.
CACertifying authority certificates.
ROOTRoot certificates.

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

StorePassword
char*

Default Value: ""

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

StoreType
int

Default Value: 0

This is the type of certificate store for this certificate.

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

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, the necessary data must first be collected using the CertMgr class. The ListStoreCertificates method may be called after setting CertStoreType to cstPKCS11, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use.

When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN.

Code Example. SSH Authentication with Security Key: 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);

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
char* (read-only)

Default Value: ""

This field contains comma-separated lists of alternative subject names for the certificate.

ThumbprintMD5
char* (read-only)

Default Value: ""

This field contains 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
char* (read-only)

Default Value: ""

This field contains 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
char* (read-only)

Default Value: ""

This field contains 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
char* (read-only)

Default Value: ""

This field contains the text description of UsageFlags.

This value will be of 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 Value: 0

This field contains the flags that show intended use for the certificate. The value of UsageFlags is a combination of the following flags:

0x80Digital Signature
0x40Non-Repudiation
0x20Key Encipherment
0x10Data Encipherment
0x08Key Agreement
0x04Certificate Signing
0x02CRL Signing
0x01Encipher Only

Please see the Usage field for a text representation of UsageFlags.

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

Version
char* (read-only)

Default Value: ""

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

Subject
char*

Default Value: ""

This is the subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the field is set to the full subject of the matching certificate.

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=support@nsoftware.com". Common fields and their meanings are as follows:

FieldMeaning
CNCommon Name. This is commonly a hostname like www.server.com.
OOrganization
OUOrganizational Unit
LLocality
SState
CCountry
EEmail Address

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

Encoded
char*

Default Value: ""

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

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

Constructors

Certificate()

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

Certificate(const char* lpEncoded, int lenEncoded)

Parses Encoded as an X.509 public key.

Certificate(int iStoreType, const char* lpStore, int lenStore, const char* lpszStorePassword, const char* lpszSubject)

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or Base64-encoded) 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.

SSHChannel Type

A currently open Secure Shell (SSH) channel.

Syntax

IPWorksSSHSSHChannel (declared in ipworksssh.h)

Remarks

This type describes the Secure Shell (SSH) client's currently open channels. You may use the different fields for this type to manage the channel.

Fields

BytesSent
int (read-only)

Default Value: 0

The number of bytes actually sent after a sending channel data.

ChannelEOL
char*

Default Value: ""

This property is used to break the incoming data stream into chunks separated by EOL.

This property is a binary string. Notably, this means that it can be more than one byte long, and it can contain NULL bytes.

ChannelEOL and MaxChannelLength must be set together or unexpected behavior could occur.

ChannelId
char* (read-only)

Default Value: ""

An Id generated by the class to identify the current Secure Shell (SSH) channel.

This Id is unique to this channel.

MaxChannelLength
int

Default Value: 0

The maximum amount of data to accumulate when no EOL is found.

MaxChannelLength is the size of an internal buffer, which holds received data while waiting for a ChannelEOL string.

If the ChannelEOL string is found in the input stream before MaxChannelLength bytes are received, the SSHChannelData event is fired with the ChannelDataEOLFound parameter set to True, and the buffer is reset.

If no ChannelEOL is found, and MaxChannelLength bytes are accumulated in the buffer, the SSHChannelData event is fired with the ChannelDataEOLFound parameter set to False, and the buffer is reset.

ChannelEOL and MaxChannelLength must be set together or unexpected behavior could occur.

ReadyToSend
int (read-only)

Default Value: FALSE

This field is True when data can be sent over the Secure Shell (SSH) channel.

When Timeout is set to 0 (asynchronous) sending data may result in an error if the channel or underlying socket cannot accept more data to send. Monitor SSHChannelReadyToSend or ReadyToSend to determine when data can be sent again.

When Timeout is set to a positive value the class will block when sending data until the data can be successfully sent and SSHChannelReadyToSend and ReadyToSend do not need to be monitored.

RecordLength
int (read-only)

Default Value: 0

This field holds the current record length set by ChangeRecordLength. When this value is a positive number, the class will accumulate data until RecordLength is reached and only then will it fire the SSHChannelDataIn event with the data of length RecordLength. This allows data to be received as records of known length. This value can be changed at any time by calling ChangeRecordLength, including within the SSHChannelDataIn event.

A value of 0 (default) means this setting is not used.

Service
char* (read-only)

Default Value: ""

This field holds the channel type that was requested when opening the channel. For instance "session" or "forwarded-tcpip".

SSHConnection Type

A currently connected client.

Syntax

IPWorksSSHSSHConnection (declared in ipworksssh.h)

Remarks

This type describes the connection of a client which is currently connected to the class. You may use the different fields of this type to manage the connection.

Fields

Connected
int (read-only)

Default Value: FALSE

This field indicates the status of individual connections.

When true, the connection is established. Use the Disconnect method to disconnect an existing connection.

ConnectionId
char* (read-only)

Default Value: ""

An id generated by the class to identify each connection. This id is unique to this connection.

LocalAddress
char* (read-only)

Default Value: ""

This field shows the IP address of the interface through which the connection is passing.

LocalAddress is important for multihomed hosts where it can be used to find which particular network interface an individual connection is going through.

RemoteHost
char* (read-only)

Default Value: ""

The RemoteHost shows the IP address of the remote host through which the connection is coming.

The connection must be valid or an error will be fired.

If the class is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.

RemotePort
int (read-only)

Default Value: 0

The RemotePort shows the TCP port on the remote host through which the connection is coming.

The connection must be valid or an error will be fired.

Timeout
int

Default Value: 0

A timeout for the class.

If the Timeout property is set to 0, all operations return immediately, potentially failing with an 'WOULDBLOCK' error if data can't be sent or received immediately.

If Timeout is set to a positive value, the class will automatically retry each operation that would otherwise result in a 'WOULDBLOCK' error for a maximum of Timeout seconds.

The class will use DoEvents 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 class fails with an error.

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 0 (asynchronous operation).

Constructors

SSHConnection()

SSHPrompt Type

A prompt to provide to the client during keyboard-interactive authentication.

Syntax

IPWorksSSHSSHPrompt (declared in ipworksssh.h)

Remarks

This type describes a prompt the SSH daemon will send to the client when requesting keyboard-interactive authentication.

Fields

Echo
int

Default Value: FALSE

Specifies if the client should echo the value entered by the user or not.

Prompt
char*

Default Value: ""

The prompt label/text the client should present to the user.

Constructors

SSHPrompt()
SSHPrompt(const char* lpszPrompt, int bEcho)

IPWorksSSHList Type

Syntax

IPWorksSSHList<T> (declared in ipworksssh.h)

Remarks

IPWorksSSHList is a generic class that is used to hold a collection of objects of type T, where T is one of the custom types supported by the SSHServer class.

Methods

GetCount This method returns the current size of the collection.

int GetCount() {}

SetCount This method sets the size of the collection. This method returns 0 if setting the size was successful; or -1 if the collection is ReadOnly. When adding additional objects to a collection call this method to specify the new size. Increasing the size of the collection preserves existing objects in the collection.

int SetCount() {}

Get This method gets the item at the specified position. The index parameter specifies the index of the item in the collection. This method returns NULL if an invalid index is specified.

T* Get(int index) {}

Set This method sets the item at the specified position. The index parameter specifies the index of the item in the collection that is being set. This method returns -1 if an invalid index is specified. Note: Objects created using the new operator must be freed using the delete operator; they will not be automatically freed by the class.

T* Set(int index, T* value) {}

Config Settings (SSHServer Class)

The class 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 class, access to these internal properties is provided through the Config method.

SSHServer Config Settings

AltSSHCertCount:   The number of records in the AltSSHCert configuration settings.

This configuration setting controls the size of the following arrays:

The array indices start at 0 and end at AltSSHCertCount - 1.

The AltSSHCert configuration settings are used to specify alternative digital certificates to the one set using the SSHCert. The server will determine the certificate to use during SSH negotiation based on the public key algorithm requested by the connecting client. A certificate with a private key is required for session authentication and encryption. The AltSSHCertSubject setting must be set last. When AltSSHCertSubject is set a search is initiated in the AltSSHCertStore and the certificate is loaded.

These alternative server certificate specified by these settings must be configured prior to setting Listening to true. For example: sftpserver.Config("AltSSHCertCount =1"); sftpserver.Config("AltSSHCertStoreType[0]=7"); //PEM Key Blob sftpserver.Config("AltSSHCertStore[0]=" + ed25519Key); //PEM formatted string sftpserver.Config("AltSSHCertSubject[0]=*"); //Load the first (and only) certificate

AltSSHCertStore[i]:   The name of the certificate store.

The name of the certificate store. This is used when specifying an alternative SSHCert.

The AltSSHCertStoreType specifies the type of the certificate store specified by AltSSHCertStore. IF the store is password protected, specify the password in the AltSSHCertStorePassword.

AltSSHCertStore is used in conjunction with the AltSSHCertSubject field in order to specify the certificate.

Designations of certificate stores are platform dependent.

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

MYA certificate store holding personal certificates with their associated private keys.
CACertifying authority certificates.
ROOTRoot certificates.

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

AltSSHCertStorePassword[i]:   The password used to open the certificate store.

If the certificate store is of a type that requires a password, this setting can be used to specify that password. This is used when specifying an alternative SSHCert

AltSSHCertStoreType[i]:   The type of certificate store.

This specifies the type of certificate store. This is used when specifying an alternate SSHCert. Possible values are:

0 User - This is the 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 Machine - For Windows, this specifies that the certificate store is a machine store. Note: This store type is not available in Java.
2 PFXFile - The certificate store is the name of a PFX (PKCS12) file containing certificates.
3 PFXBlob - The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS12) format.
4 JKSFile - The certificate store is the name of a Java Key Store (JKS) file containing certificates. Note: This store type is available only in Java.
5 JKSBlob - 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 available only in Java.
6 PEMKeyFile - The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate.
7 PEMKeyBlob - The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate.
14 PPKFile - The certificate store is the name of a file that contains a PPK (PuTTY Private Key).
15 PPKBlob - The certificate store is a string (binary) that contains a PPK (PuTTY Private Key).
16 XMLFile - The certificate store is the name of a file that contains a certificate in XML format.
17 XMLBlob - The certificate store is a string that contains a certificate in XML format.
AltSSHCertSubject[i]:   The alternative certificate subject.

The subject of the certificate. This is used when specifying an alternative SSHCert. The special value of * may be used to select the first certificate in the store.

ClientSSHVersionString[ConnectionId]:   The client's version string.

This setting returns a connected client's SSH version string. It may be queried inside SSHUserAuthRequest. sftpserver1.OnSSHUserAuthRequest += (obj, ev) => { Console.WriteLine(sftpserver1.Config("ClientSSHVersionString[" + ev.ConnectionId + "]")); };

FireAuthRequestAfterSig:   Whether to fire an informational event after the public key signature has been verified.

When performing public key authentication the connecting client will present both the public key itself as well as a signature to verify ownership of the corresponding private key. The class will automatically verify the signature and respond to the client to indicate whether the signature could be verified and the connection can continue. This setting controls whether an additional informational event fires to report the result of the signature verification.

If set to true, the SSHUserAuthRequest event will fire twice per public key authentication attempt. The first time the event fires for public key authentication as usual. After verification of the signature has taken place the SSHUserAuthRequest will fire again, and the AuthMethod parameter will contain the string sigstatus. The AuthParam parameter will contain a value of 0 (invalid signature) or 1 (valid signature). If the signature is invalid it will always result in a rejected authentication attempt.

KeyboardInteractivePrompts[ConnectionId]:   Specifies custom keyboard-interactive prompts for particular connections.

By default, setting the KeyboardInteractivePrompts property will cause those prompts to be used for every user attempting to connect. This setting can be used to override the KeyboardInteractivePrompts property and provide unique prompts for certain connections.

This setting takes a list of prompts to display to the client, and each prompt includes an 'echo' parameter to specify whether or not to echo the client's response to the prompt. The prompt itself and the echo parameter should be separated by a comma (","), and each prompt should be separated by a semi-colon (";"). For example:

"KeyboardInteractivePrompts[connId]=First prompt,echo=false;Second prompt,echo=true"

This config can be set anywhere in code, but it is necessary to know the ConnectionId for the specific connection beforehand; as such, it is generally recommended to set this config inside the SSHUserAuthRequest event. Since connecting clients initially attempt to connect with and AuthMethod of 'none' (with the understanding that this attempt will fail, and the SSH server will advertise which authentication methods it supports), It is recommended to check the AuthMethod, User, and ConnectionId parameters of the SSHUserAuthRequest event and set this config accordingly.

When SSHServer displays keyboard-interactive prompts, it will first check to see if this config is populated for the current ConnectionId. If it is, the prompts set here will be used instead of those set in the KeyboardInteractivePrompts property. Otherwise, the KeyboardInteractivePrompts property will function as normal.

KeyRenegotiationThreshold:   Sets the threshold for the SSH Key Renegotiation.

This property allows you to specify the threshold, in the number of bytes, for the SSH Key Renegotiation. The default value for this property is set to 1 GB.

Example (for setting the threshold to 500 MB): SSHComponent.Config("KeyRenegotiationThreshold=524288000")

LogLevel:   Specifies the level of detail that is logged.

This setting controls the level of detail that is logged through the Log event. Possible values are:

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

MaxAuthAttempts:   The maximum authentication attempts allowed before forcing a disconnect.

This setting specifies the maximum amount of authentication attempts that will be allowed before forcibly disconnecting the client.

NegotiatedStrictKex[ConnectionId]:   Returns whether strict key exchange was negotiated to be used.

Returns whether strict key exchange (strict kex) was negotiated during the SSH handshake. This is a per-connection setting accessed by passing the ConnectionId. If strict kex is being used, then this will return "True". If strict kex is not being used, then this will return "False".

component.Config("NegotiatedStrictKex[connId]")

ServerSSHVersionString:   The SSH version string sent to connecting clients.

This setting specifies the version string value that is sent to all connecting clients. This may be set to specify server specific information. The default value is "SSH-2.0-IPWorks SSH Daemon 2024". When setting your own value it must begin with "SSH-2.0-" as this is a standard format that specifies the supported SSH version.

SSHKeepAliveCountMax:   The maximum number of keep alive packets to send without a response.

This 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 class will continue to send keep alive packets until SSHKeepAliveCountMax is reached. If this is reached the class will assume the connection is broken and disconnect. The default value is 5.

SSHKeepAliveInterval:   The interval between keep alive packets.

This setting specifies the number of seconds between keep alive packets. If set to a positive value the class will send a SSH keep alive packet after KeepAliveInterval seconds of inactivity. This setting only takes effect when there is no activity, if any data is 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 class uses a default value of 30.

SSHKeyExchangeAlgorithms:   Specifies the supported key exchange algorithms.

This may be used to specify the list of supported key exchange algorithms used during SSH negotiation. The value should contain a comma separated list of algorithms. Supported algorithms are:

  • 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-toWM5Slw5Ew8Mqkay+al2g==
  • gss-group16-sha512-toWM5Slw5Ew8Mqkay+al2g==
  • gss-nistp256-sha256-toWM5Slw5Ew8Mqkay+al2g==
  • gss-curve25519-sha256-toWM5Slw5Ew8Mqkay+al2g==
  • gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==
  • gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==
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,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,gss-group14-sha256-toWM5Slw5Ew8Mqkay+al2g==,gss-group16-sha512-toWM5Slw5Ew8Mqkay+al2g==,gss-nistp256-sha256-toWM5Slw5Ew8Mqkay+al2g==,gss-curve25519-sha256-toWM5Slw5Ew8Mqkay+al2g==,gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==,gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==.
SSHMacAlgorithms:   Specifies the supported Mac algorithms.

This 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:

  • 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
  • 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 allowed signature algorithms used by a client performing public key authentication.

This setting specifies a list of signature algorithms that a client is allowed to use 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. When a client connects the server will verify that the client performing public key authentication has used one of the specified signature algorithms. If the client uses a signature algorithm which is not in the list the connection will be rejected.

Possible values are:

  • 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,x509v3-sign-rsa,ssh-dss,x509v3-sign-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519.

SSHPublicKeyAlgorithms:   Specifies the supported public key algorithms for the server's public key.

This 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 below value would accept connections for SSH 1.99, 2.0, and 2.99 hosts.

*SSH-1.99-*,*SSH-2.0-*,*SSH-2.99-*
UserAuthBanner[ConnectionId]:   A custom user authentication banner.

This setting specifies a custom user authentication banner, which may be sent to give the client more information regarding an authentication attempt. "connectionId" specifies the particular connection to send the message to. This configuration option is only effective when set within the SSHUserAuthRequest event.

UseStrictKeyExchange:   Specifies how strict key exchange is supported.

This setting controls whether strict key exchange (strict kex) is enabled to mitigate the Terrapin attack. When enabled, the class will indicate support for strict key exchange by automatically including the pseudo-algorithm kex-strict-c-v00@openssh.com for client classes and kex-strict-s-v00@openssh.com for server classes in the list of supported key exchange algorithms.

Since both client and server must implement strict key exchange to effectively mitigate the Terrapin attack, the class provides options to further control the behavior in different scenarios. Possible values for this setting are:

0Disabled. Strict key exchange is not supported in the class.
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.
2Enabled, but 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 only continue if the selected encryption and MAC algorithms are not affected by the Terrapin attack.
3Required. If the remote host does not support strict key exchange the connection will fail.

TCPServer Config Settings

AllowedClients:   A comma-separated list of host names or IP addresses that can access the class.

This configuration setting defines a comma-separated list of host names or IPv4 addresses that may access the class. The wildcard character "*" is supported. The default value is "*" and all connections are accepted.

When a client connects, the client's address is checked against the list defined here. If there is no match, the ConnectionRequest event fires with an Accept value set to false. If no action is taken within the ConnectionRequest event, the client will be disconnected.

BindExclusively:   Whether or not the component considers a local port reserved for exclusive use.

If this is true (default), the component will bind to the local port with the ExclusiveAddressUse option set, meaning that nothing else can bind to the same port. Also the component will not be able to bind to local ports that are already in use by some other instance, and attempts to do so will result in failure.

BlockedClients:   A comma-separated list of host names or IP addresses that cannot access the class.

This configuration setting defines a comma-separated list of host names or IPv4 addresses that cannot access the class.The default value is "" and all connections are accepted.

When a client connects, the client's address is checked against the list defined here. If there is a match, the ConnectionRequest event fires with an Accept value set to false. If no action is taken within the ConnectionRequest event, the client will not be connected.

ConnectionUID:   The unique connectionId for a connection.

Connection Ids may be reused as clients connect and disconnect. Querying ConnectionUID will return a unique identifier for that connection Id. If the specified connection Id does not exist, then ConnectionUID will return 0. For example:

Connection5UID = obj.config("ConnectionUID[5]")

DefaultConnectionTimeout:   The inactivity timeout applied to the SSL handshake.

This configuration setting specifies the inactivity (in seconds) to apply to incoming Secure Sockets Layer (SSL) connections. When set to a positive value, if the other end is unresponsive for the specified number of seconds, the connection will timeout. This is not applicable to the entire handshake. It is applicable only to the inactivity of the connecting client during the handshake if a response is expected and none is received within the timeout window. The default value is 0, and no connection-specific timeout is applied.

Note: This is applicable only to incoming SSL connections. This should be set only if there is a specific reason to do so.

InBufferSize:   The size in bytes of the incoming queue of the socket.

This is the size of an internal queue in the Transmission Control Protocol (TCP)/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. Increasing the value of the InBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated, the InBufferSize reverts to its defined size. The same thing will happen if you attempt to make it too large or too small.

InBufferSize is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified.

KeepAliveInterval:   The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.

A TCP keep-alive packet will be sent after a period of inactivity, as defined by KeepAliveTime. If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. If this value is not specified here, the system default is 1 second. This setting is applicable to all connections.

Note: This value is not applicable in macOS.

KeepAliveRetryCount:   The number of keep-alive packets to be sent before the remotehost is considered disconnected.

A TCP keep-alive packet will be sent after a period of inactivity, as defined by KeepAliveTime. If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This setting specifies the number of times that the keep-alive packets will be sent again before the remote host is considered disconnected. If this value is not specified here, the system default is 9.

Note: This configuration setting is available only in the Unix platform, and it is not supported in macOS or FreeBSD.

KeepAliveTime:   The inactivity time in milliseconds before a TCP keep-alive packet is sent.

By default, the operating system will determine the time a connection is idle before a TCP keep-alive packet is sent. If this value is not specified here, the system default is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds. This setting is applicable to all connections.

MaxConnections:   The maximum number of connections available.

This is the maximum number of connections available. This property must be set before Listening is set to true, and once set, it can no longer be changed for the current instance of the class. The maximum value for this setting is 100,000 connections. Use this setting with caution. Extremely large values may affect performance. The default value is 1000.

Note: Unix/Linux operating systems limit the number of simultaneous connections to 1024.

MaxReadTime:   The maximum time spent reading data from each connection.

This setting specifies the maximum time in milliseconds that the class will spend reading data from a particular connection before servicing other connections. When a single client is sending data to the class at a high rate this setting is used to ensure that other connections are serviced in a timely manner. Specifying a positive value prevents a single client from monopolizing the class's resources. The special value of 0 indicates no limit and is generally not recommended.

The default value is 50 (milliseconds).

OutBufferSize:   The size in bytes of the outgoing queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. Increasing the value of the OutBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the OutBufferSize reverts to its defined size. The same thing will happen if you attempt to make it too large or too small.

OutBufferSize is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified.

TcpNoDelay:   Whether or not to delay when sending packets.

When set to True, the socket will send all data that are ready to send at once. When set to False, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm.

By default, this configuration setting is set to False.

UseIOCP:   Whether to use the completion port I/O model.

The default value is false. When set to true, the class will use an I/O Completion Port (IOCP) to manage operations on sockets. A single completion port allows the asynchronous notification of network events on an entire group of sockets. This property must be set before Listening is set to true.

Nothing else is required to begin accepting IOCP connections. One major benefit to using this model is that there will be no thread blocked waiting for a request to complete. The system notifies the process through an Asynchronous Procedure Call (APC) once the device driver finishes servicing the I/O request. IOCP allows a single I/O worker thread handle multiple clients' input/output "fairly".

Note: When set to true, this setting will automatically set UseWindowsMessages to false.

UseIPv6:   Whether to use IPv6.

When set to 0 (default), the class will use IPv4 exclusively. When set to 1, the class will use IPv6 exclusively. When set to 2, the class will listen for both IPv4 and IPv6 connections. If IPv6 is not available on the system, only IPv4 will be used. The default value is 0. Possible values are as follows:

0 IPv4 Only
1 IPv6 Only
2 IPv6 and IPv4
UseWindowsMessages:   Whether to use the WSAAsyncSelect I/O model.

The default value is true, and the class will receive a Windows message-based notification of network events. Turning on Windows message notifications allows the application to get connect, send, receive, and socket closure network event notifications on a socket. This property must be set before Listening is set to true.

Nothing else is required to begin accepting connections using the Windows message queue. In high-traffic environments, messages will be discarded if the queue is full. Additionally, because a single window procedure will service all events on thousands of sockets, the Windows message queue is not scalable from a performance perspective.

If this setting is set to false, the class will instead use the Winsock select model instead. The component supports additional I/O models. Please see UseIOCP for more information.

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.

CodePage:   The system code page used for Unicode to Multibyte translations.

The default code page is Unicode UTF-8 (65001).

The following is a list of valid code page identifiers:

IdentifierName
037IBM EBCDIC - U.S./Canada
437OEM - United States
500IBM EBCDIC - International
708Arabic - ASMO 708
709Arabic - ASMO 449+, BCON V4
710Arabic - Transparent Arabic
720Arabic - Transparent ASMO
737OEM - Greek (formerly 437G)
775OEM - Baltic
850OEM - Multilingual Latin I
852OEM - Latin II
855OEM - Cyrillic (primarily Russian)
857OEM - Turkish
858OEM - Multilingual Latin I + Euro symbol
860OEM - Portuguese
861OEM - Icelandic
862OEM - Hebrew
863OEM - Canadian-French
864OEM - Arabic
865OEM - Nordic
866OEM - Russian
869OEM - Modern Greek
870IBM EBCDIC - Multilingual/ROECE (Latin-2)
874ANSI/OEM - Thai (same as 28605, ISO 8859-15)
875IBM EBCDIC - Modern Greek
932ANSI/OEM - Japanese, Shift-JIS
936ANSI/OEM - Simplified Chinese (PRC, Singapore)
949ANSI/OEM - Korean (Unified Hangul Code)
950ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC)
1026IBM EBCDIC - Turkish (Latin-5)
1047IBM EBCDIC - Latin 1/Open System
1140IBM EBCDIC - U.S./Canada (037 + Euro symbol)
1141IBM EBCDIC - Germany (20273 + Euro symbol)
1142IBM EBCDIC - Denmark/Norway (20277 + Euro symbol)
1143IBM EBCDIC - Finland/Sweden (20278 + Euro symbol)
1144IBM EBCDIC - Italy (20280 + Euro symbol)
1145IBM EBCDIC - Latin America/Spain (20284 + Euro symbol)
1146IBM EBCDIC - United Kingdom (20285 + Euro symbol)
1147IBM EBCDIC - France (20297 + Euro symbol)
1148IBM EBCDIC - International (500 + Euro symbol)
1149IBM EBCDIC - Icelandic (20871 + Euro symbol)
1200Unicode UCS-2 Little-Endian (BMP of ISO 10646)
1201Unicode UCS-2 Big-Endian
1250ANSI - Central European
1251ANSI - Cyrillic
1252ANSI - Latin I
1253ANSI - Greek
1254ANSI - Turkish
1255ANSI - Hebrew
1256ANSI - Arabic
1257ANSI - Baltic
1258ANSI/OEM - Vietnamese
1361Korean (Johab)
10000MAC - Roman
10001MAC - Japanese
10002MAC - Traditional Chinese (Big5)
10003MAC - Korean
10004MAC - Arabic
10005MAC - Hebrew
10006MAC - Greek I
10007MAC - Cyrillic
10008MAC - Simplified Chinese (GB 2312)
10010MAC - Romania
10017MAC - Ukraine
10021MAC - Thai
10029MAC - Latin II
10079MAC - Icelandic
10081MAC - Turkish
10082MAC - Croatia
12000Unicode UCS-4 Little-Endian
12001Unicode UCS-4 Big-Endian
20000CNS - Taiwan
20001TCA - Taiwan
20002Eten - Taiwan
20003IBM5550 - Taiwan
20004TeleText - Taiwan
20005Wang - Taiwan
20105IA5 IRV International Alphabet No. 5 (7-bit)
20106IA5 German (7-bit)
20107IA5 Swedish (7-bit)
20108IA5 Norwegian (7-bit)
20127US-ASCII (7-bit)
20261T.61
20269ISO 6937 Non-Spacing Accent
20273IBM EBCDIC - Germany
20277IBM EBCDIC - Denmark/Norway
20278IBM EBCDIC - Finland/Sweden
20280IBM EBCDIC - Italy
20284IBM EBCDIC - Latin America/Spain
20285IBM EBCDIC - United Kingdom
20290IBM EBCDIC - Japanese Katakana Extended
20297IBM EBCDIC - France
20420IBM EBCDIC - Arabic
20423IBM EBCDIC - Greek
20424IBM EBCDIC - Hebrew
20833IBM EBCDIC - Korean Extended
20838IBM EBCDIC - Thai
20866Russian - KOI8-R
20871IBM EBCDIC - Icelandic
20880IBM EBCDIC - Cyrillic (Russian)
20905IBM EBCDIC - Turkish
20924IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol)
20932JIS X 0208-1990 & 0121-1990
20936Simplified Chinese (GB2312)
21025IBM EBCDIC - Cyrillic (Serbian, Bulgarian)
21027Extended Alpha Lowercase
21866Ukrainian (KOI8-U)
28591ISO 8859-1 Latin I
28592ISO 8859-2 Central Europe
28593ISO 8859-3 Latin 3
28594ISO 8859-4 Baltic
28595ISO 8859-5 Cyrillic
28596ISO 8859-6 Arabic
28597ISO 8859-7 Greek
28598ISO 8859-8 Hebrew
28599ISO 8859-9 Latin 5
28605ISO 8859-15 Latin 9
29001Europa 3
38598ISO 8859-8 Hebrew
50220ISO 2022 Japanese with no halfwidth Katakana
50221ISO 2022 Japanese with halfwidth Katakana
50222ISO 2022 Japanese JIS X 0201-1989
50225ISO 2022 Korean
50227ISO 2022 Simplified Chinese
50229ISO 2022 Traditional Chinese
50930Japanese (Katakana) Extended
50931US/Canada and Japanese
50933Korean Extended and Korean
50935Simplified Chinese Extended and Simplified Chinese
50936Simplified Chinese
50937US/Canada and Traditional Chinese
50939Japanese (Latin) Extended and Japanese
51932EUC - Japanese
51936EUC - Simplified Chinese
51949EUC - Korean
51950EUC - Traditional Chinese
52936HZ-GB2312 Simplified Chinese
54936Windows XP: GB18030 Simplified Chinese (4 Byte)
57002ISCII Devanagari
57003ISCII Bengali
57004ISCII Tamil
57005ISCII Telugu
57006ISCII Assamese
57007ISCII Oriya
57008ISCII Kannada
57009ISCII Malayalam
57010ISCII Gujarati
57011ISCII Punjabi
65000Unicode UTF-7
65001Unicode UTF-8
The following is a list of valid code page identifiers for Mac OS only:
IdentifierName
1ASCII
2NEXTSTEP
3JapaneseEUC
4UTF8
5ISOLatin1
6Symbol
7NonLossyASCII
8ShiftJIS
9ISOLatin2
10Unicode
11WindowsCP1251
12WindowsCP1252
13WindowsCP1253
14WindowsCP1254
15WindowsCP1250
21ISO2022JP
30MacOSRoman
10UTF16String
0x90000100UTF16BigEndian
0x94000100UTF16LittleEndian
0x8c000100UTF32String
0x98000100UTF32BigEndian
0x9c000100UTF32LittleEndian
65536Proprietary

LicenseInfo:   Information about the current license.

When queried, this setting will return a string containing information about the license this instance of a class 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.

This setting only works on these classes: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.

ProcessIdleEvents:   Whether the class uses its internal event loop to process events when the main thread is idle.

If set to False, the class will not fire internal idle events. Set this to False to use the class in a background thread on Mac OS. By default, this setting is True.

SelectWaitMillis:   The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.

If there are no events to process when DoEvents is called, the class will wait for the amount of time specified here before returning. The default value is 20.

UseFIPSCompliantAPI:   Tells the class whether or not to use FIPS certified APIs.

When set to true, the class 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 classes 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 article.

Note: This setting is applicable only on Windows.

Note: Enabling FIPS compliance requires a special license; please contact sales@nsoftware.com for details.

UseInternalSecurityAPI:   Whether or not to use the system security libraries or an internal implementation.

When set to false, the class will use the system security libraries by default to perform cryptographic functions where applicable.

Setting this configuration setting to true tells the class 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.

To use the system security libraries for Linux, OpenSSL support must be enabled. For more information on how to enable OpenSSL, please refer to the OpenSSL Notes section.

Trappable Errors (SSHServer Class)

Error Handling (C++)

Call the GetLastErrorCode() method to obtain the last called method's result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. Known error codes are listed below. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

SSHServer Errors

1201   Could not forward connection. A detailed message follows.
1202   Could not forward connection/channel data. A detailed message follows.
1300   Could not authenticate client.
1301   No server certificate was specified or no private key found.

TCPServer Errors

100   You cannot change the RemotePort at this time. A connection is in progress.
101   You cannot change the RemoteHost at this time. A connection is in progress.
102   The RemoteHost address is invalid (0.0.0.0).
104   TCPServer is already listening.
106   Cannot change LocalPort when TCPServer is listening.
107   Cannot change LocalHost when TCPServer is listening.
108   Cannot change MaxConnections when TCPServer is listening.
112   You cannot change MaxLineLength at this time. A connection is in progress.
116   RemotePort cannot be zero. Please specify a valid service port number.
126   Invalid ConnectionId.
135   Operation would block.

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).