DTLSServer Module
Properties Methods Events Config Settings Errors
The DTLSServer module provides server-side functionality for secure UDP communication utilizing the Datagram Transport Layer Security (DTLS) protocol.
Syntax
IPWorksDTLS.DTLSServer
Remarks
The DTLSServer class functions as a server that facilitates incoming DTLS connections and offers a convenient means of transmitting and receiving datagrams over the established, secure connections.
Getting Started
First, a valid certificate must be selected before the server can start listening for incoming connections. The certificate can be specified via the SSLCert. Note the certificate must contain a private key.
After doing so, calling StartListening will cause the class to start listening for incoming connections. The class will listen on the interface defined by LocalHost and LocalPort, if specified. Otherwise, these values will be set by the class. If applicable, these values must be set before calling StartListening. For example:
//dtlsserver.LocalHost = "some_ip_address";
//dtlsserver.LocalPort = 1234;
dtlsserver.SSLCert = new Certificate("/path/to/cert.pfx", CertStoreTypes.cstPFXFile, "cert_password", "cert_subject");
dtlsserver.StartListening();
Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort);
while (dtlsserver.Listening) {
dtlsserver.DoEvents();
}
Handling Incoming Connections
Once successfully listening, the class can now accept (or reject) incoming connections. The first indicator of an incoming connection will be through the ConnectionRequest event. Here, the connection's originating address and port can be queried. By default, the class will accept all incoming connections, but this behavior can be overridden within this event.
Assuming the connection is accepted, the DTLS handshake will proceed. Relevant handshake details will be reported by the SSLStatus event. By default, the client is not required to present a certificate to the server. To force this, the SSLAuthenticateClients property can be enabled. When enabled, the client's presented certificate will be available within the SSLClientAuthentication event, where the server can again choose to accept (or reject) incoming connections.
Once the connection is complete (or fails), the Connected event will fire. Note that this event will fire if a connection succeeds or fails. If successful, the event will fire with a StatusCode of 0. If this value is non-zero, it indicates the connection was unsuccessful. The Description parameter will contain relevant details.
After a successful connection, relevant connection-specific details will be available within the Connections collection. Each connection will be assigned a unique ConnectionId, which can be acquired for a given connection within the Connected event. For example:
dtlsserver.OnConnected += (o, e) => {
if (e.StatusCode == 0) {
Console.WriteLine("Successful connection from " + e.SourceAddr + ":" + e.SourcePort);
Console.WriteLine("ConnectionId: " + e.ConnectionId);
} else {
Console.WriteLine("Connection failed from " + e.SourceAddr + ":" + e.SourcePort);
Console.WriteLine("Error code: " + e.StatusCode);
Console.WriteLine("Error description: " + e.Description);
}
};
dtlsserver.OnSSLClientAuthentication += (o, e) => {
if (e.Accept) return;
Console.Write("Client provided the following certificate:\nIssuer: " + e.CertIssuer + "\nSubject: " + e.CertSubject + "\n");
Console.Write("The following problems have been determined for this certificate: " + e.Status + "\n");
Console.Write("Would you like to accept anyways? [y/n] ");
if (Console.Read() == 'y') e.Accept = true;
};
dtlsserver.SSLCert = new Certificate("/path/to/cert.pfx", CertStoreTypes.cstPFXFile, "cert_password", "cert_subject");
dtlsserver.AuthenticateClients = true;
dtlsserver.StartListening();
Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort);
while (dtlsserver.Listening) {
dtlsserver.DoEvents();
}
Sending and Receiving Data
The class can send data to individual connections, specified by the ConnectionId parameter, via the SendBytes and SendText methods.
While a connection is active, incoming data from a connection will be available within the DataIn event. Note that this event is non-reentrant, and it is recommended to offload time-consuming operations to ensure the best performance.
If required, the PauseData method can be called, disabling the reception of incoming data from a particular connection. Data reception can later be enabled via the ProcessData method. Note that if this reception is disabled for a connection, the connection may continue sending data, which will remain unprocessed by the class. In this case, the underlying socket buffer may be filled. This can result in possible data loss originating from this connection. Please use these methods with caution.
The complete process may look like the following:
dtlsserver.OnDataIn += (o, e) => {
Console.WriteLine("Packet received from: " + e.ConnectionId);
Console.WriteLine("Packet: " + e.Datagram);
};
dtlsserver.SSLCert = new Certificate("/path/to/cert.pfx", CertStoreTypes.cstPFXFile, "cert_password", "cert_subject");
dtlsserver.StartListening();
Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort);
...
...
...
// Broadcast data
foreach (DTLSConnection c in dtlsserver.Connections.Values) {
dtlsserver.SendText(c.ConnectionId, "Hello world!");
}
Removing Connections
To remove a connection, Disconnect must be called with the corresponding ConnectionId. In order to remove inactive connections, the DefaultIdleTimeout property can be set accordingly. By default, this property is set to 0, and idle connections are not removed automatically. When this property is set to a positive value, this will automatically remove connections that are idle for a specified amount of time.
Note: For DefaultIdleTimeout to work as intended, DoEvents must be called frequently in both console and form-based applications (e.g., using a loop or timer).
Finally, once a connection ends, Disconnected will fire. In the case a connection ends and an error is encountered, the StatusCode and Description parameters will contain relevant details regarding the error. The connection will be removed from the Connections collection. For example:
dtlsserver.OnDisconnected += (o, e) => {
if (e.StatusCode == 0) {
Console.WriteLine("Connection removed: " + e.ConnectionId);
} else {
Console.WriteLine("Connection removed: " + e.ConnectionId);
Console.WriteLine("Error code: " + e.StatusCode);
Console.WriteLine("Error description: " + e.Description);
}
};
dtlsserver.DefaultIdleTimeout = 60; // Remove connections inactive for 60 seconds
dtlsserver.StartListening();
Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort);
while (dtlsserver.Listening) {
dtlsserver.DoEvents();
}
Additional Information
To support DefaultIdleTimeout and KeepAlive functionality, it is important to note that DoEvents must be called regularly in both console and form-based applications.
For DefaultIdleTimeout, DoEvents must be called frequently to ensure that idle connections are handled and removed in a timely manner. For KeepAlive, DoEvents must be called frequently to ensure the class sends keep-alive (or Heartbeat) packets to existing connections in a timely manner.
In form-based applications, this does not apply if DefaultIdleTimeout is set to 0 and KeepAlive is False.
Property List
The following is the full list of the properties of the module with short descriptions. Click on the links for further details.
| Connections | This property includes a collection of currently connected clients. |
| DefaultIdleTimeout | This property includes the default idle timeout for inactive clients. |
| KeepAlive | When True, keep-alive functionality is enabled via the DTLS Heartbeat Extension. |
| Listening | This property indicates whether the module is listening for incoming connections on LocalPort. |
| LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| LocalPort | This property includes the Transmission Control Protocol (TCP) port in the local host where the module listens. |
| SSLAuthenticateClients | If set to True, the server asks the client(s) for a certificate. |
| SSLCert | The certificate to be used during Secure Sockets Layer (SSL) negotiation. |
Method List
The following is the full list of the methods of the module with short descriptions. Click on the links for further details.
| Config | Sets or retrieves a configuration setting. |
| Disconnect | This method disconnects the specified client. |
| DoEvents | This method processes events from the internal message queue. |
| PauseData | This method pauses data reception. |
| ProcessData | This method reenables data reception after a call to PauseData . |
| Reset | This method will reset the module. |
| SendBytes | This method sends binary data to the specified client. |
| SendText | This method sends text to the specified client. |
| Shutdown | This method shuts down the server. |
| StartListening | This method starts listening for incoming connections. |
| StopListening | This method stops listening for new connections. |
Event List
The following is the full list of the events fired by the module with short descriptions. Click on the links for further details.
| Connected | This event is fired immediately after a connection completes (or fails). |
| ConnectionRequest | This event is fired when a request for connection comes from a remote host. |
| DataIn | This event is fired when data is received. |
| Disconnected | This event is fired when a connection is closed. |
| Error | This event fires information about errors during data delivery. |
| Log | This event fires once for each log message. |
| SSLClientAuthentication | This event is fired when the client presents its credentials to the server. |
| SSLStatus | This event is fired to show the progress of the secure connection. |
Config Settings
The following is a list of config settings for the module with short descriptions. Click on the links for further details.
| KeepAliveInterval | The retry interval, in seconds, to be used when a HeartbeatRequest is sent and no response is received. |
| KeepAliveMode | Specifies the Heartbeat (or keep-alive) mode to be used by the module. |
| KeepAliveTime | The inactivity time, in seconds, before a HeartbeatRequest is sent. |
| LogLevel | This configuration controls the level of detail that is logged through the Log event. |
| MaxConnections | Specifies the maximum number of simultaneous connections the server can maintain. |
| CaptureIPPacketInfo | Used to capture the packet information. |
| DelayHostResolution | Whether the hostname is resolved when RemoteHost is set. |
| DestinationAddress | Used to get the destination address from the packet information. |
| DontFragment | Used to set the Don't Fragment flag of outgoing packets. |
| LocalHost | The name of the local host through which connections are initiated or accepted. |
| LocalPort | The port in the local host where the module binds. |
| MaxPacketSize | The maximum length of the packets that can be received. |
| QOSDSCPValue | Used to specify an arbitrary QOS/DSCP setting (optional). |
| QOSTrafficType | Used to specify QOS/DSCP settings (optional). |
| ShareLocalPort | If set to True, allows more than one instance of the module to be active on the same local port. |
| UseConnection | Determines whether to use a connected socket. |
| UseIPv6 | Whether or not to use IPv6. |
| AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| FirewallData | Used to send extra data to the firewall. |
| InBufferSize | The size in bytes of the incoming queue of the socket. |
| OutBufferSize | The size in bytes of the outgoing queue of the socket. |
| LogSSLPackets | Controls whether SSL packets are logged. |
| ReuseSSLSession | Determines if the SSL session is reused. |
| SSLCACerts | A newline separated list of CA certificates to be included when performing an SSL handshake. |
| SSLCheckCRL | Whether to check the Certificate Revocation List for the server certificate. |
| SSLCheckOCSP | Whether to use OCSP to check the status of the server certificate. |
| SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
| SSLClientCACerts | A newline separated list of CA certificates to use during SSL client certificate validation. |
| SSLEnabledCipherSuites | Specifies the cipher suites to be used during TLS negotiation. |
| SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
| SSLEnableRenegotiation | Whether the renegotiation_info SSL extension is supported. |
| SSLKeyLogFile | The location of a file where per-session secrets are written for debugging purposes. |
| SSLNegotiatedCipher | Returns the negotiated cipher suite. |
| SSLNegotiatedCipherStrength | Returns the negotiated cipher suite strength. |
| SSLNegotiatedCipherSuite | Returns the negotiated cipher suite. |
| SSLNegotiatedKeyExchange | Returns the negotiated key exchange algorithm. |
| SSLNegotiatedKeyExchangeStrength | Returns the negotiated key exchange algorithm strength. |
| SSLNegotiatedVersion | Returns the negotiated protocol version. |
| SSLSecurityFlags | Flags that control certificate verification. |
| SSLServerCACerts | A newline separated list of CA certificates to use during SSL server certificate validation. |
| TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. |
| TLS12SupportedGroups | The supported groups for ECC. |
| BuildInfo | Information about the product's build. |
| CodePage | The system code page used for Unicode to Multibyte translations. |
| LicenseInfo | Information about the current license. |
| MaskSensitiveData | Whether sensitive data is masked in log messages. |
| UseInternalSecurityAPI | Whether or not to use the system security libraries or an internal implementation. |
Connections Property (DTLSServer Module)
This property includes a collection of currently connected clients.
Syntax
public var connections: [Int32: DTLSConnection] { get {...} }
@property (nonatomic,readwrite,assign,getter=connectionCount,setter=setConnectionCount:) int connectionCount; - (int)connectionCount; - (void)setConnectionCount :(int)newConnectionCount; - (int)connectionConnectionId:(int)connectionId; - (NSString*)connectionLocalHost:(int)connectionId; - (int)connectionLocalPort:(int)connectionId; - (NSString*)connectionRemoteHost:(int)connectionId; - (int)connectionRemotePort:(int)connectionId;
Default Value
""
Remarks
This property includes a collection of currently connected clients. All of the connections may be managed using this property. Each connection is described by different fields of the DTLSConnection type.
The collection is a hash-table type of collection, in which the ConnectionId string is used as the key to the desired connection. You may acquire the key for a given connection through the Connected event.
Example (Broadcasting Data)
foreach (DTLSConnection c in dtlsserver.Connections.Values) {
dtlsserver.SendText(c.ConnectionId, "Hello world!");
}
If an error occurs when setting this property an error will not be thrown. This property has a related method which will throw an error:
public func setConnectionsB(connections: Data) throws public func setConnections(connections: String) throws
DefaultIdleTimeout Property (DTLSServer Module)
This property includes the default idle timeout for inactive clients.
Syntax
public var defaultIdleTimeout: Int32 { get {...} set {...} }
@property (nonatomic,readwrite,assign,getter=defaultIdleTimeout,setter=setDefaultIdleTimeout:) int defaultIdleTimeout; - (int)defaultIdleTimeout; - (void)setDefaultIdleTimeout :(int)newDefaultIdleTimeout;
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.
KeepAlive Property (DTLSServer Module)
When True, keep-alive functionality is enabled via the DTLS Heartbeat Extension.
Syntax
public var keepAlive: Bool { get {...} set {...} }
@property (nonatomic,readwrite,assign,getter=keepAlive,setter=setKeepAlive:) BOOL keepAlive; - (BOOL)keepAlive; - (void)setKeepAlive :(BOOL)newKeepAlive;
Default Value
False
Remarks
This property enables keep-alive functionality for established connections via the DTLS Heartbeat Extension (RFC 6520). Enabling this option can prevent long connections from timing out in case of inactivity.
Note: For this functionality to work as intended, DoEvents must be called frequently in both console and form-based applications (e.g., using a loop or timer).
Additionally, DTLS server implementations are not required to support Heartbeats.
Listening Property (DTLSServer Module)
This property indicates whether the module is listening for incoming connections on LocalPort.
Syntax
public var listening: Bool { get {...} }
@property (nonatomic,readonly,assign,getter=listening) BOOL listening; - (BOOL)listening;
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.
If an error occurs when setting this property an error will not be thrown. This property has a related method which will throw an error:
public func setListening(listening: Bool) throws
LocalHost Property (DTLSServer Module)
The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
Syntax
public var localHost: String { get {...} set {...} }
@property (nonatomic,readwrite,assign,getter=localHost,setter=setLocalHost:) NSString* localHost; - (NSString*)localHost; - (void)setLocalHost :(NSString*)newLocalHost;
Default Value
""
Remarks
This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.
In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the 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.
LocalPort Property (DTLSServer Module)
This property includes the Transmission Control Protocol (TCP) port in the local host where the module listens.
Syntax
public var localPort: Int32 { get {...} set {...} }
@property (nonatomic,readwrite,assign,getter=localPort,setter=setLocalPort:) int localPort; - (int)localPort; - (void)setLocalPort :(int)newLocalPort;
Default Value
0
Remarks
This property must be set before the class can start 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 this property after the class is listening (i.e., after successfully assigning True to the Listening property).
The service port is not shared among servers so two classs cannot be listening on the same port at the same time.
SSLAuthenticateClients Property (DTLSServer Module)
If set to True, the server asks the client(s) for a certificate.
Syntax
public var sslAuthenticateClients: Bool { get {...} set {...} }
@property (nonatomic,readwrite,assign,getter=SSLAuthenticateClients,setter=setSSLAuthenticateClients:) BOOL SSLAuthenticateClients; - (BOOL)SSLAuthenticateClients; - (void)setSSLAuthenticateClients :(BOOL)newSSLAuthenticateClients;
Default Value
False
Remarks
This property is used in conjunction with the SSLClientAuthentication event. Please refer to the documentation of the SSLClientAuthentication event for details.
SSLCert Property (DTLSServer Module)
The certificate to be used during Secure Sockets Layer (SSL) negotiation.
Syntax
public var sslCert: Certificate { get {...} set {...} }
@property (nonatomic,readonly,assign,getter=SSLCertEffectiveDate) NSString* SSLCertEffectiveDate; - (NSString*)SSLCertEffectiveDate; @property (nonatomic,readonly,assign,getter=SSLCertExpirationDate) NSString* SSLCertExpirationDate; - (NSString*)SSLCertExpirationDate; @property (nonatomic,readonly,assign,getter=SSLCertExtendedKeyUsage) NSString* SSLCertExtendedKeyUsage; - (NSString*)SSLCertExtendedKeyUsage; @property (nonatomic,readonly,assign,getter=SSLCertFingerprint) NSString* SSLCertFingerprint; - (NSString*)SSLCertFingerprint; @property (nonatomic,readonly,assign,getter=SSLCertFingerprintSHA1) NSString* SSLCertFingerprintSHA1; - (NSString*)SSLCertFingerprintSHA1; @property (nonatomic,readonly,assign,getter=SSLCertFingerprintSHA256) NSString* SSLCertFingerprintSHA256; - (NSString*)SSLCertFingerprintSHA256; @property (nonatomic,readonly,assign,getter=SSLCertIssuer) NSString* SSLCertIssuer; - (NSString*)SSLCertIssuer; @property (nonatomic,readonly,assign,getter=SSLCertPrivateKey) NSString* SSLCertPrivateKey; - (NSString*)SSLCertPrivateKey; @property (nonatomic,readonly,assign,getter=SSLCertPrivateKeyAvailable) BOOL SSLCertPrivateKeyAvailable; - (BOOL)SSLCertPrivateKeyAvailable; @property (nonatomic,readonly,assign,getter=SSLCertPrivateKeyContainer) NSString* SSLCertPrivateKeyContainer; - (NSString*)SSLCertPrivateKeyContainer; @property (nonatomic,readonly,assign,getter=SSLCertPublicKey) NSString* SSLCertPublicKey; - (NSString*)SSLCertPublicKey; @property (nonatomic,readonly,assign,getter=SSLCertPublicKeyAlgorithm) NSString* SSLCertPublicKeyAlgorithm; - (NSString*)SSLCertPublicKeyAlgorithm; @property (nonatomic,readonly,assign,getter=SSLCertPublicKeyLength) int SSLCertPublicKeyLength; - (int)SSLCertPublicKeyLength; @property (nonatomic,readonly,assign,getter=SSLCertSerialNumber) NSString* SSLCertSerialNumber; - (NSString*)SSLCertSerialNumber; @property (nonatomic,readonly,assign,getter=SSLCertSignatureAlgorithm) NSString* SSLCertSignatureAlgorithm; - (NSString*)SSLCertSignatureAlgorithm; @property (nonatomic,readwrite,assign,getter=SSLCertStore,setter=setSSLCertStore:) NSString* SSLCertStore; - (NSString*)SSLCertStore; - (void)setSSLCertStore :(NSString*)newSSLCertStore; @property (nonatomic,readwrite,assign,getter=SSLCertStoreB,setter=setSSLCertStoreB:) NSData* SSLCertStoreB; - (NSData*)SSLCertStoreB; - (void)setSSLCertStoreB :(NSData*)newSSLCertStore; @property (nonatomic,readwrite,assign,getter=SSLCertStorePassword,setter=setSSLCertStorePassword:) NSString* SSLCertStorePassword; - (NSString*)SSLCertStorePassword; - (void)setSSLCertStorePassword :(NSString*)newSSLCertStorePassword; @property (nonatomic,readwrite,assign,getter=SSLCertStoreType,setter=setSSLCertStoreType:) int SSLCertStoreType; - (int)SSLCertStoreType; - (void)setSSLCertStoreType :(int)newSSLCertStoreType; @property (nonatomic,readonly,assign,getter=SSLCertSubjectAltNames) NSString* SSLCertSubjectAltNames; - (NSString*)SSLCertSubjectAltNames; @property (nonatomic,readonly,assign,getter=SSLCertThumbprintMD5) NSString* SSLCertThumbprintMD5; - (NSString*)SSLCertThumbprintMD5; @property (nonatomic,readonly,assign,getter=SSLCertThumbprintSHA1) NSString* SSLCertThumbprintSHA1; - (NSString*)SSLCertThumbprintSHA1; @property (nonatomic,readonly,assign,getter=SSLCertThumbprintSHA256) NSString* SSLCertThumbprintSHA256; - (NSString*)SSLCertThumbprintSHA256; @property (nonatomic,readonly,assign,getter=SSLCertUsage) NSString* SSLCertUsage; - (NSString*)SSLCertUsage; @property (nonatomic,readonly,assign,getter=SSLCertUsageFlags) int SSLCertUsageFlags; - (int)SSLCertUsageFlags; @property (nonatomic,readonly,assign,getter=SSLCertVersion) NSString* SSLCertVersion; - (NSString*)SSLCertVersion; @property (nonatomic,readwrite,assign,getter=SSLCertSubject,setter=setSSLCertSubject:) NSString* SSLCertSubject; - (NSString*)SSLCertSubject; - (void)setSSLCertSubject :(NSString*)newSSLCertSubject; @property (nonatomic,readwrite,assign,getter=SSLCertEncoded,setter=setSSLCertEncoded:) NSString* SSLCertEncoded; - (NSString*)SSLCertEncoded; - (void)setSSLCertEncoded :(NSString*)newSSLCertEncoded; @property (nonatomic,readwrite,assign,getter=SSLCertEncodedB,setter=setSSLCertEncodedB:) NSData* SSLCertEncodedB; - (NSData*)SSLCertEncodedB; - (void)setSSLCertEncodedB :(NSData*)newSSLCertEncoded;
Default Value
""
Remarks
This property includes the digital certificate that the class will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the field to the encoded certificate. To select a certificate, use the store and subject fields.
If an error occurs when setting this property an error will not be thrown. This property has a related method which will throw an error:
public func setSSLCertB(sslCert: Data) throws public func setSSLCert(sslCert: String) throws
Config Method (DTLSServer Module)
Sets or retrieves a configuration setting.
Syntax
- (NSString*)config:(NSString*)configurationString;
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.
Disconnect Method (DTLSServer Module)
This method disconnects the specified client.
Syntax
Remarks
Calling this method will disconnect the client specified by the ConnectionId parameter.
DoEvents Method (DTLSServer Module)
This method processes events from the internal message queue.
Syntax
public func doEvents() throws -> Void
- (void)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.
PauseData Method (DTLSServer Module)
This method pauses data reception.
Syntax
Remarks
This method pauses data reception for the connection identified by ConnectionId when called. While data reception is paused, the DataIn event will not fire for the specified connection. Call ProcessData to reenable data reception.
ProcessData Method (DTLSServer Module)
This method reenables data reception after a call to PauseData .
Syntax
Remarks
This method reenables data reception for the connection identified by ConnectionId after a previous call to PauseData. When PauseData is called, the DataIn event will not fire for the specified connection. To reenable data reception and allow DataIn to fire, call this method.
Note: This method is used only after previously calling PauseData. It does not need to be called to process incoming data by default.
Reset Method (DTLSServer Module)
This method will reset the component.
Syntax
public func reset() throws -> Void
- (void)reset;
Remarks
This method will reset the class's properties to their default values.
SendBytes Method (DTLSServer Module)
This method sends binary data to the specified client.
Syntax
- (void)sendBytes:(int)connectionId :(NSData*)data;
Remarks
This method sends binary data to the client identified by ConnectionId. For example:
byte[] dataToSend = new byte[] { 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33 };
foreach (DTLSConnection c in dtlsserver.Connections.Values) {
dtlsserver.SendBytes(c.ConnectionId, dataToSend);
}
To send text, use the SendText method instead.
SendText Method (DTLSServer Module)
This method sends text to the specified client.
Syntax
- (void)sendText:(int)connectionId :(NSString*)text;
Remarks
This method sends text to the client identified by ConnectionId. For example:
string dataToSend = "Hello world!";
foreach (DTLSConnection c in dtlsserver.Connections.Values) {
dtlsserver.SendText(c.ConnectionId, dataToSend);
}
To send binary data, use the SendBytes method instead.
Shutdown Method (DTLSServer Module)
This method shuts down the server.
Syntax
public func shutdown() throws -> Void
- (void)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.
StartListening Method (DTLSServer Module)
This method starts listening for incoming connections.
Syntax
public func startListening() throws -> Void
- (void)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.
StopListening Method (DTLSServer Module)
This method stops listening for new connections.
Syntax
public func stopListening() throws -> Void
- (void)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.
Connected Event (DTLSServer Module)
This event is fired immediately after a connection completes (or fails).
Syntax
func onConnected(connectionId: Int32, sourceAddr: String, sourcePort: Int32, statusCode: Int32, description: String)
- (void)onConnected:(int)connectionId :(NSString*)sourceAddr :(int)sourcePort :(int)statusCode :(NSString*)description;
Remarks
This event is fired immediately after a connection completes (or fails). The ConnectionId parameter indicates the unique ID assigned to this connection.
SourceAddr contains the IP number (Internet address) of the remote party, and SourcePort contains the port from which the packet originated.
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.
ConnectionRequest Event (DTLSServer Module)
This event is fired when a request for connection comes from a remote host.
Syntax
func onConnectionRequest(address: String, port: Int32, accept: inout Bool)
- (void)onConnectionRequest:(NSString*)address :(int)port :(int*)accept;
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.
DataIn Event (DTLSServer Module)
This event is fired when data is received.
Syntax
- (void)onDataIn:(int)connectionId :(NSData*)datagram;
Remarks
The DataIn event is fired every time a new datagram is received.
ConnectionId indicates the unique Id of the DTLSConnection from which the packet originated.
Datagram contains the packet as sent by the remote host.
Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.
Disconnected Event (DTLSServer Module)
This event is fired when a connection is closed.
Syntax
- (void)onDisconnected:(int)connectionId :(int)statusCode :(NSString*)description;
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 (DTLSServer Module)
This event fires information about errors during data delivery.
Syntax
- (void)onError:(int)connectionId :(int)errorCode :(NSString*)description;
Remarks
The Error event is fired in case of exceptional conditions during message processing. Normally, the class .
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.
ConnectionId indicates the connection for which the error is applicable.
Log Event (DTLSServer Module)
This event fires once for each log message.
Syntax
- (void)onLog:(int)connectionId :(int)logLevel :(NSString*)message :(NSString*)logType;
Remarks
This event fires once for each log message generated by the class. The verbosity is controlled by the LogLevel setting.
LogLevel indicates the level of message. Possible values are as follows:
| 0 (None) | No events are logged. |
| 1 (Info - default) | Informational events are logged. |
| 2 (Verbose) | Detailed data are logged. |
| 3 (Debug) | Debug data are logged. |
The value 1 (Info) logs basic information, including users logging in and out, files transferred, and directories listed.
The value 2 (Verbose) includes logs from the PITrail event as well as basic information about data transfer channels.
The value 3 (Debug) logs additional debug information, such as extended socket connection and data transfer information.
Message is the log entry.
LogType identifies the type of log entry. Possible values are as follows:
- "Info"
- "Error"
- "Verbose"
- "Debug"
SSLClientAuthentication Event (DTLSServer Module)
This event is fired when the client presents its credentials to the server.
Syntax
func onSSLClientAuthentication(connectionId: Int32, certEncoded: Data, certSubject: String, certIssuer: String, status: String, accept: inout Bool)
- (void)onSSLClientAuthentication:(int)connectionId :(NSData*)certEncoded :(NSString*)certSubject :(NSString*)certIssuer :(NSString*)status :(int*)accept;
Remarks
This event enables the server to decide whether or not to continue. The Accept parameter is a recommendation on whether to continue or to close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.
When Accept is False, Status shows why the verification failed (otherwise, Status contains the string "OK").
SSLStatus Event (DTLSServer Module)
This event is fired to show the progress of the secure connection.
Syntax
- (void)onSSLStatus:(int)connectionId :(NSString*)message;
Remarks
The event is fired for informational and logging purposes only. It is used to track the progress of the connection.
Certificate Type
This is the digital certificate being used.
Remarks
This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.
Fields
effectiveDate
String (read-only)
Default Value: ""
The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:
23-Jan-2000 15:00:00.
expirationDate
String (read-only)
Default Value: ""
The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:
23-Jan-2001 15:00:00.
extendedKeyUsage
String (read-only)
Default Value: ""
A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).
fingerprint
String (read-only)
Default Value: ""
The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02
fingerprintSHA1
String (read-only)
Default Value: ""
The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84
fingerprintSHA256
String (read-only)
Default Value: ""
The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53
issuer
String (read-only)
Default Value: ""
The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.
privateKey
String (read-only)
Default Value: ""
The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.
Note: The may be available but not exportable. In this case, returns an empty string.
privateKeyAvailable
Bool (read-only)
Default Value: False
Whether a is available for the selected certificate. If is True, the certificate may be used for authentication purposes (e.g., server authentication).
privateKeyContainer
String (read-only)
Default Value: ""
The name of the container for the certificate (if available). This functionality is available only on Windows platforms.
publicKey
String (read-only)
Default Value: ""
The public key of the certificate. The key is provided as PEM/Base64-encoded data.
publicKeyAlgorithm
String (read-only)
Default Value: ""
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
Int32 (read-only)
Default Value: 0
The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.
serialNumber
String (read-only)
Default Value: ""
The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.
signatureAlgorithm
String (read-only)
Default Value: ""
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.
storeB
Data
Default Value: "MY"
The name of the certificate store for the client certificate.
The property denotes the type of the certificate store specified by . If the store is password-protected, specify the password in .
is used in conjunction with the property to specify client certificates. If has a value, and or is set, a search for a certificate is initiated. Please see the property for details.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
store
String
Default Value: "MY"
The name of the certificate store for the client certificate.
The property denotes the type of the certificate store specified by . If the store is password-protected, specify the password in .
is used in conjunction with the property to specify client certificates. If has a value, and or is set, a search for a certificate is initiated. Please see the property for details.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
storePassword
String
Default 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
CertStoreTypes
Default Value: 0
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 property 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 and set to the PIN. Code Example. SSH Authentication with Security Key:
|
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |
subjectAltNames
String (read-only)
Default Value: ""
Comma-separated lists of alternative subject names for the certificate.
thumbprintMD5
String (read-only)
Default Value: ""
The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
thumbprintSHA1
String (read-only)
Default Value: ""
The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
thumbprintSHA256
String (read-only)
Default Value: ""
The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
usage
String (read-only)
Default Value: ""
This value will be one or more of the following strings and will be separated by commas:
- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only
If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.
usageFlags
Int32 (read-only)
Default Value: 0
The flags that show intended use for the certificate. The value of is a combination of the following flags:
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |
Please see the property for a text representation of .
This functionality currently is not available when the provider is OpenSSL.
version
String (read-only)
Default Value: ""
The certificate's version number. The possible values are the strings "V1", "V2", and "V3".
subject
String
Default Value: ""
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 property 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:
| Field | Meaning |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |
If a field value contains a comma, it must be quoted.
encodedB
Data
Default Value: ""
The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The and properties also may be used to specify a certificate.
When is set, a search is initiated in the current for the private key of the certificate. If the key is found, is updated to reflect the full subject of the selected certificate; otherwise, is set to an empty string.
encoded
String
Default Value: ""
The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The and properties also may be used to specify a certificate.
When is set, a search is initiated in the current for the private key of the certificate. If the key is found, is updated to reflect the full subject of the selected certificate; otherwise, is set to an empty string.
Constructors
public init()
Creates a instance whose properties can be set. This is useful for use with when generating new certificates.
public init(encoded: )
Parses Encoded as an X.509 public key.
public init(storeType: , store: , storePassword: , subject: )
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
public init(storeType: , store: , storePassword: , subject: )
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a byte array containing the certificate data. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
DTLSConnection Type
This is a currently connected client.
Remarks
This type describes the connection of a client that is currently connected to the class. You may use the different fields of this type to manage the connection.
Fields
connectionId
Int32 (read-only)
Default Value: 0
This property contains an identifier generated by the class to identify each connection. This identifier is unique to this connection.
localHost
String (read-only)
Default Value: ""
This property indicates the name of the local host or user-assigned IP interface through which connections are initiated or accepted.
localPort
Int32 (read-only)
Default Value: 0
This property indicates the UDP port on the local host or user-assigned IP interface through which connections are initiated or accepted.
remoteHost
String (read-only)
Default Value: ""
This property indicates 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
Int32 (read-only)
Default Value: 0
This property indicates the UDP port on the remote host through which the connection is coming.
The connection must be valid or an error will be fired.
Constructors
public init()
Config Settings (DTLSServer Module)
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.DTLSServer Config Settings
The class will send a HeartbeatRequest message after a specified period of inactivity, defined by KeepAliveTime. This value specifies the interval at which the class sends successive HeartbeatRequest messages, assuming no response is received from the remote host (HeartbeatResponse). By default, this value is 2 seconds and will only apply if KeepAlive is true.
| 1 | peer_allowed_to_send (default) |
| 2 | peer_not_allowed_to_send |
When set to 2 (peer_not_allowed_to_send), the class will only be capable of sending HeartbeatRequests.
Note, if KeepAlive is false, Heartbeat functionality will be disabled. The class will not be capable of sending or handling HeartbeatRequest messages.
If the connection is inactive for the specified time, the class will send a HeartbeatRequest message to the remote host. If no response is received, the class will continue sending Heartbeats every KeepAliveInterval seconds. By default, this value is 60 seconds and will only apply if KeepAlive is true.
| 0 (None) | No events are logged. |
| 1 (Info - default) | Informational events are logged. |
| 2 (Verbose) | Detailed data are logged. |
| 3 (Debug) | Debug data are logged. |
UDP Config Settings
The default value for this setting is False.
Note: This setting is available only in Windows.
The default value is .
Note: This setting is available only in Windows.
In multihomed hosts (machines with more than one IP interface), setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.
If the class is connected, the LocalHost setting 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).
Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established.
LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.
This configuration setting is useful when trying to connect to services that require a trusted port on the client side. An example is the remote shell (rsh) service in UNIX systems.
Note: This setting uses the qWAVE API and is available only on Windows 7, Windows Server 2008 R2, and later.
Note: This setting uses the qWAVE API and is available only on Windows Vista and Windows Server 2008 or above.
Note: QOSTrafficType must be set before setting Active to True.
The default value for this setting is False.
The default value for this setting is False.
Socket Config Settings
Note: This option is not valid for User Datagram Protocol (UDP) ports.
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 happens if you attempt to make it too large or too small.
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 happens if you attempt to make it too large or too small.
SSL Config Settings
When enabled, SSL packet logs are output using the SSLStatus event, which will fire each time a SSL packet is sent or received.
If set to True, the class will reuse the context if and only if the following criteria are met:
- The target host name is the same.
- The system cache entry has not expired (default timeout is 10 hours).
- The application process that calls the function is the same.
- The logon session is the same.
- The instance of the class is the same.
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
When set to 0 (default), the CRL check will not be performed by the class. When set to 1, it will attempt to perform the CRL check, but it will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.
This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.
When set to 0 (default), the class will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but it will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported.
This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.
Note: This configuration setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the SSLStatus event.
Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.
When the provider is OpenSSL, SSLCipherStrength is currently not supported. This functionality is instead made available through the OpenSSLCipherList configuration setting.
The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
By default, the enabled cipher suites will include all available ciphers ("*").
The special value "*" means that the class will pick all of the supported cipher suites. If SSLEnabledCipherSuites is set to any other value, only the specified cipher suites will be considered.
Multiple cipher suites are separated by semicolons. For example:
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA");
Possible cipher suites include the following:
- TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA
- TLS_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_DES_CBC_SHA
- TLS_DHE_RSA_WITH_DES_CBC_SHA
- TLS_DHE_DSS_WITH_DES_CBC_SHA
- TLS_RSA_WITH_RC4_128_MD5
- TLS_RSA_WITH_RC4_128_SHA
The default value is 3072. To specify a combination of enabled protocol versions set this config to the binary OR of one or more of the following values:
| TLS1.2 | 3072 (Hex C00) (Default - Client and Server) |
This configuration setting is applicable only when SSLProvider is set to Internal.
When set, the class will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools, such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffic for debugging purposes. When writing to this file, the class will only append, it will not overwrite previous values.
Note: This configuration setting is applicable only when SSLProvider is set to Internal.
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipher[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipherStrength[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipherSuite[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedKeyExchange[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedKeyExchangeStrength[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedVersion[connId]");
| 0x00000001 | Ignore time validity status of certificate. |
| 0x00000002 | Ignore time validity status of CTL. |
| 0x00000004 | Ignore non-nested certificate times. |
| 0x00000010 | Allow unknown certificate authority. |
| 0x00000020 | Ignore wrong certificate usage. |
| 0x00000100 | Ignore unknown certificate revocation status. |
| 0x00000200 | Ignore unknown CTL signer revocation status. |
| 0x00000400 | Ignore unknown certificate authority revocation status. |
| 0x00000800 | Ignore unknown root revocation status. |
| 0x00008000 | Allow test root certificate. |
| 0x00004000 | Trust test root certificate. |
| 0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). |
This functionality is currently not available when the provider is OpenSSL.
The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
When specified the class will verify that the server certificate signature algorithm is among the values specified in this configuration setting. If the server certificate signature algorithm is unsupported, the class .
The format of this value is a comma-separated list of hash-signature combinations. For instance:
component.SSLProvider = TCPClientSSLProviders.sslpInternal;
component.Config("SSLEnabledProtocols=3072"); //TLS 1.2
component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa");
The default value for this configuration setting is sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa.
To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.
The default value is ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1.
When using TLS 1.2 and SSLProvider is set to Internal, the values refer to the supported groups for ECC. The following values are supported:
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)
Base Config Settings
The following is a list of valid code page identifiers:
| Identifier | Name |
| 037 | IBM EBCDIC - U.S./Canada |
| 437 | OEM - United States |
| 500 | IBM EBCDIC - International |
| 708 | Arabic - ASMO 708 |
| 709 | Arabic - ASMO 449+, BCON V4 |
| 710 | Arabic - Transparent Arabic |
| 720 | Arabic - Transparent ASMO |
| 737 | OEM - Greek (formerly 437G) |
| 775 | OEM - Baltic |
| 850 | OEM - Multilingual Latin I |
| 852 | OEM - Latin II |
| 855 | OEM - Cyrillic (primarily Russian) |
| 857 | OEM - Turkish |
| 858 | OEM - Multilingual Latin I + Euro symbol |
| 860 | OEM - Portuguese |
| 861 | OEM - Icelandic |
| 862 | OEM - Hebrew |
| 863 | OEM - Canadian-French |
| 864 | OEM - Arabic |
| 865 | OEM - Nordic |
| 866 | OEM - Russian |
| 869 | OEM - Modern Greek |
| 870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) |
| 874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) |
| 875 | IBM EBCDIC - Modern Greek |
| 932 | ANSI/OEM - Japanese, Shift-JIS |
| 936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) |
| 949 | ANSI/OEM - Korean (Unified Hangul Code) |
| 950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) |
| 1026 | IBM EBCDIC - Turkish (Latin-5) |
| 1047 | IBM EBCDIC - Latin 1/Open System |
| 1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) |
| 1141 | IBM EBCDIC - Germany (20273 + Euro symbol) |
| 1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) |
| 1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) |
| 1144 | IBM EBCDIC - Italy (20280 + Euro symbol) |
| 1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) |
| 1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) |
| 1147 | IBM EBCDIC - France (20297 + Euro symbol) |
| 1148 | IBM EBCDIC - International (500 + Euro symbol) |
| 1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) |
| 1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) |
| 1201 | Unicode UCS-2 Big-Endian |
| 1250 | ANSI - Central European |
| 1251 | ANSI - Cyrillic |
| 1252 | ANSI - Latin I |
| 1253 | ANSI - Greek |
| 1254 | ANSI - Turkish |
| 1255 | ANSI - Hebrew |
| 1256 | ANSI - Arabic |
| 1257 | ANSI - Baltic |
| 1258 | ANSI/OEM - Vietnamese |
| 1361 | Korean (Johab) |
| 10000 | MAC - Roman |
| 10001 | MAC - Japanese |
| 10002 | MAC - Traditional Chinese (Big5) |
| 10003 | MAC - Korean |
| 10004 | MAC - Arabic |
| 10005 | MAC - Hebrew |
| 10006 | MAC - Greek I |
| 10007 | MAC - Cyrillic |
| 10008 | MAC - Simplified Chinese (GB 2312) |
| 10010 | MAC - Romania |
| 10017 | MAC - Ukraine |
| 10021 | MAC - Thai |
| 10029 | MAC - Latin II |
| 10079 | MAC - Icelandic |
| 10081 | MAC - Turkish |
| 10082 | MAC - Croatia |
| 12000 | Unicode UCS-4 Little-Endian |
| 12001 | Unicode UCS-4 Big-Endian |
| 20000 | CNS - Taiwan |
| 20001 | TCA - Taiwan |
| 20002 | Eten - Taiwan |
| 20003 | IBM5550 - Taiwan |
| 20004 | TeleText - Taiwan |
| 20005 | Wang - Taiwan |
| 20105 | IA5 IRV International Alphabet No. 5 (7-bit) |
| 20106 | IA5 German (7-bit) |
| 20107 | IA5 Swedish (7-bit) |
| 20108 | IA5 Norwegian (7-bit) |
| 20127 | US-ASCII (7-bit) |
| 20261 | T.61 |
| 20269 | ISO 6937 Non-Spacing Accent |
| 20273 | IBM EBCDIC - Germany |
| 20277 | IBM EBCDIC - Denmark/Norway |
| 20278 | IBM EBCDIC - Finland/Sweden |
| 20280 | IBM EBCDIC - Italy |
| 20284 | IBM EBCDIC - Latin America/Spain |
| 20285 | IBM EBCDIC - United Kingdom |
| 20290 | IBM EBCDIC - Japanese Katakana Extended |
| 20297 | IBM EBCDIC - France |
| 20420 | IBM EBCDIC - Arabic |
| 20423 | IBM EBCDIC - Greek |
| 20424 | IBM EBCDIC - Hebrew |
| 20833 | IBM EBCDIC - Korean Extended |
| 20838 | IBM EBCDIC - Thai |
| 20866 | Russian - KOI8-R |
| 20871 | IBM EBCDIC - Icelandic |
| 20880 | IBM EBCDIC - Cyrillic (Russian) |
| 20905 | IBM EBCDIC - Turkish |
| 20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) |
| 20932 | JIS X 0208-1990 & 0121-1990 |
| 20936 | Simplified Chinese (GB2312) |
| 21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) |
| 21027 | Extended Alpha Lowercase |
| 21866 | Ukrainian (KOI8-U) |
| 28591 | ISO 8859-1 Latin I |
| 28592 | ISO 8859-2 Central Europe |
| 28593 | ISO 8859-3 Latin 3 |
| 28594 | ISO 8859-4 Baltic |
| 28595 | ISO 8859-5 Cyrillic |
| 28596 | ISO 8859-6 Arabic |
| 28597 | ISO 8859-7 Greek |
| 28598 | ISO 8859-8 Hebrew |
| 28599 | ISO 8859-9 Latin 5 |
| 28605 | ISO 8859-15 Latin 9 |
| 29001 | Europa 3 |
| 38598 | ISO 8859-8 Hebrew |
| 50220 | ISO 2022 Japanese with no halfwidth Katakana |
| 50221 | ISO 2022 Japanese with halfwidth Katakana |
| 50222 | ISO 2022 Japanese JIS X 0201-1989 |
| 50225 | ISO 2022 Korean |
| 50227 | ISO 2022 Simplified Chinese |
| 50229 | ISO 2022 Traditional Chinese |
| 50930 | Japanese (Katakana) Extended |
| 50931 | US/Canada and Japanese |
| 50933 | Korean Extended and Korean |
| 50935 | Simplified Chinese Extended and Simplified Chinese |
| 50936 | Simplified Chinese |
| 50937 | US/Canada and Traditional Chinese |
| 50939 | Japanese (Latin) Extended and Japanese |
| 51932 | EUC - Japanese |
| 51936 | EUC - Simplified Chinese |
| 51949 | EUC - Korean |
| 51950 | EUC - Traditional Chinese |
| 52936 | HZ-GB2312 Simplified Chinese |
| 54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) |
| 57002 | ISCII Devanagari |
| 57003 | ISCII Bengali |
| 57004 | ISCII Tamil |
| 57005 | ISCII Telugu |
| 57006 | ISCII Assamese |
| 57007 | ISCII Oriya |
| 57008 | ISCII Kannada |
| 57009 | ISCII Malayalam |
| 57010 | ISCII Gujarati |
| 57011 | ISCII Punjabi |
| 65000 | Unicode UTF-7 |
| 65001 | Unicode UTF-8 |
| Identifier | Name |
| 1 | ASCII |
| 2 | NEXTSTEP |
| 3 | JapaneseEUC |
| 4 | UTF8 |
| 5 | ISOLatin1 |
| 6 | Symbol |
| 7 | NonLossyASCII |
| 8 | ShiftJIS |
| 9 | ISOLatin2 |
| 10 | Unicode |
| 11 | WindowsCP1251 |
| 12 | WindowsCP1252 |
| 13 | WindowsCP1253 |
| 14 | WindowsCP1254 |
| 15 | WindowsCP1250 |
| 21 | ISO2022JP |
| 30 | MacOSRoman |
| 10 | UTF16String |
| 0x90000100 | UTF16BigEndian |
| 0x94000100 | UTF16LittleEndian |
| 0x8c000100 | UTF32String |
| 0x98000100 | UTF32BigEndian |
| 0x9c000100 | UTF32LittleEndian |
| 65536 | Proprietary |
- 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.
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.
Setting this configuration setting to tells the class to use the internal implementation instead of using the system security libraries.
This setting is set to by default on all platforms.
Trappable Errors (DTLSServer Module)
DTLSServer Errors
| 400 | Invalid datagram received. See the error description for further details. |
| 401 | Invalid DTLS flow. See the error description for further details. |
| 402 | Not supported. See the error description for further details. |
| 403 | DTLS handshake error. See the error description for further details. |
| 404 | Invalid certificate provided. See the error description for further details. |
| 405 | Fatal alert. See the error description for further details. |