DTLSClient Component

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The DTLSClient component provides client-side functionality of the DTLS protocol.

Syntax

TsbxDTLSClient

Remarks

The DTLS protocol provides communications privacy for datagram protocols. The DTLS protocol is based on the Transport Layer Security (TLS) protocol and provides equivalent security guarantees. Use this component to set up secure datagram sessions from your application.

DTLS component is similar to many other network components shipped with SecureBlackbox, but is still slightly different because of DTLS relying on datagram-based UDP protocol behind the scenes. As such, there is no continues stream of data, no polling, and no guaranteed delivery of the data that you send or receive.

That said, since TLS was originally designed to operate on top of connection-oriented protocols, some of its connection-specific features and terminology made its way to DTLS. For example, you start a DTLS session with 'opening a connection' using the Connect method. A DTLS operates over UDP, there is ultimately no transport-layer connection established, and the connection analogy is only used to align with and resemble the TLS channel operating over a long-lasting TCP connection.

Therefore, in many cases it is easier to treat DTLS as a connection-oriented protocol that operates on streams of data, and DTLSClient, respectively, as a long-lasting stream protocol client. However, in doing so, please keep in mind the datagram nature of DTLS, and make sure that your application is prepared well to any side effects it may have, such as packet loss and re-ordering, and unexpected and untrackable terminations and resurrections.

Setting up DTLSClient

Most of DTLS setup is about configuring TLS-related settings. While the default configuration of DTLSClient provides a good balance of security and maximised interoperability with other known DTLS implementations, in certain cases some adjustments may be required. These, typically, are the following:

• Trusted certificate framework: this may need to be adjusted if you want your DTLS client to use a different trust framework than provided by your local system. See this article for details: Validating TLS Certificates .
• Ciphersuites can be configured via the >.
• Pre-shared key (PSK) parameters can be adjusted using > and > settings.
• Besides the above, TLSSettings provides access to some other secondary, yet important, TLS-level settings.
• If the DTLS server expects you to use a certificate for your own (client) authentication, pass it via the TLSClientChain property.

Operating DTLSClient

Working with DTLSClient can be split into the following two stages. Stage 1 is about connection setup. Call Connect to establish a DTLS 'connection'. On this stage the TLS handshake happens, where TLSCertValidate, TLSHandshake and TLSEstablished events can be fired.

Stage 2 is about working with the established 'connection'. Use SendData and ReceiveData methods to send and receive data from the connection. Long chunks of data passed to SendData can be split into multiple datagrams.

On this stage, you can also use ProcessPlainData, SendPlainData and ReceivePlainData methods to process 'mixed' protocols that can introduce plain application packets alongside DTLS packets (such as SRTP).

Once you are done with the connection, you can progress to Stage 3, and close it with a Disconnect call.

Property List

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

Method List

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

Event List

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

Config Settings

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

BlockedCertCount Property (DTLSClient Component)

The number of records in the BlockedCert arrays.

Syntax

__property int BlockedCertCount = { read=FBlockedCertCount, write=FSetBlockedCertCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• BlockedCertBytes
• BlockedCertHandle

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

This property is not available at design time.

Data Type

Integer

BlockedCertBytes Property (DTLSClient Component)

Returns the raw certificate data in DER format.

Syntax

__property DynamicArray BlockedCertBytes[int BlockedCertIndex] = { read=FBlockedCertBytes };

Remarks

Returns the raw certificate data in DER format.

The BlockedCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the BlockedCertCount property.

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

Data Type

Byte Array

BlockedCertHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 BlockedCertHandle[int BlockedCertIndex] = { read=FBlockedCertHandle, write=FSetBlockedCertHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The BlockedCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the BlockedCertCount property.

This property is not available at design time.

Data Type

Long64

Connected Property (DTLSClient Component)

Indicates whether the connection is active.

Syntax

__property bool Connected = { read=FConnected };

Default Value

false

Remarks

Use this property to check if the connection is alive.

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

Data Type

Boolean

ConnInfoAEADCipher Property (DTLSClient Component)

Indicates whether the encryption algorithm used is an AEAD cipher.

Syntax

__property bool ConnInfoAEADCipher = { read=FConnInfoAEADCipher };

Default Value

false

Remarks

Indicates whether the encryption algorithm used is an AEAD cipher.

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

Data Type

Boolean

ConnInfoChainValidationDetails Property (DTLSClient Component)

The details of a certificate chain validation outcome.

Syntax

__property int ConnInfoChainValidationDetails = { read=FConnInfoChainValidationDetails };

Default Value

0

Remarks

The details of a certificate chain validation outcome. They may often suggest the reasons that contributed to the overall validation result.

Returns a bit mask of the following options:

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

Data Type

Integer

ConnInfoChainValidationResult Property (DTLSClient Component)

The outcome of a certificate chain validation routine.

Syntax

__property TsbxDTLSClientConnInfoChainValidationResults ConnInfoChainValidationResult = { read=FConnInfoChainValidationResult };

enum TsbxDTLSClientConnInfoChainValidationResults {
  cvtValid=0,
  cvtValidButUntrusted=1,
  cvtInvalid=2,
  cvtCantBeEstablished=3
};

Default Value

cvtValid

Remarks

The outcome of a certificate chain validation routine.

Available options:

Use the ValidationLog property to access the detailed validation log.

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

Data Type

Integer

ConnInfoCiphersuite Property (DTLSClient Component)

The cipher suite employed by this connection.

Syntax

__property String ConnInfoCiphersuite = { read=FConnInfoCiphersuite };

Default Value

""

Remarks

The cipher suite employed by this connection.

For TLS connections, this property returns the ciphersuite that was/is employed by the connection.

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

Data Type

String

ConnInfoClientAuthenticated Property (DTLSClient Component)

Specifies whether client authentication was performed during this connection.

Syntax

__property bool ConnInfoClientAuthenticated = { read=FConnInfoClientAuthenticated };

Default Value

false

Remarks

Specifies whether client authentication was performed during this connection.

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

Data Type

Boolean

ConnInfoClientAuthRequested Property (DTLSClient Component)

Specifies whether client authentication was requested during this connection.

Syntax

__property bool ConnInfoClientAuthRequested = { read=FConnInfoClientAuthRequested };

Default Value

false

Remarks

Specifies whether client authentication was requested during this connection.

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

Data Type

Boolean

ConnInfoConnectionEstablished Property (DTLSClient Component)

Indicates whether the connection has been established fully.

Syntax

__property bool ConnInfoConnectionEstablished = { read=FConnInfoConnectionEstablished };

Default Value

false

Remarks

Indicates whether the connection has been established fully.

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

Data Type

Boolean

ConnInfoConnectionID Property (DTLSClient Component)

The unique identifier assigned to this connection.

Syntax

__property DynamicArray ConnInfoConnectionID = { read=FConnInfoConnectionID };

Remarks

The unique identifier assigned to this connection.

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

Data Type

Byte Array

ConnInfoDigestAlgorithm Property (DTLSClient Component)

The digest algorithm used in a TLS-enabled connection.

Syntax

__property String ConnInfoDigestAlgorithm = { read=FConnInfoDigestAlgorithm };

Default Value

""

Remarks

The digest algorithm used in a TLS-enabled connection.

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

Data Type

String

ConnInfoEncryptionAlgorithm Property (DTLSClient Component)

The symmetric encryption algorithm used in a TLS-enabled connection.

Syntax

__property String ConnInfoEncryptionAlgorithm = { read=FConnInfoEncryptionAlgorithm };

Default Value

""

Remarks

The symmetric encryption algorithm used in a TLS-enabled connection.

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

Data Type

String

ConnInfoExportable Property (DTLSClient Component)

Indicates whether a TLS connection uses a reduced-strength exportable cipher.

Syntax

__property bool ConnInfoExportable = { read=FConnInfoExportable };

Default Value

false

Remarks

Indicates whether a TLS connection uses a reduced-strength exportable cipher.

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

Data Type

Boolean

ConnInfoID Property (DTLSClient Component)

The client connection's unique identifier.

Syntax

__property __int64 ConnInfoID = { read=FConnInfoID };

Default Value

-1

Remarks

The client connection's unique identifier. This value is used throughout to refer to a particular client connection.

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

Data Type

Long64

ConnInfoKeyExchangeAlgorithm Property (DTLSClient Component)

The key exchange algorithm used in a TLS-enabled connection.

Syntax

__property String ConnInfoKeyExchangeAlgorithm = { read=FConnInfoKeyExchangeAlgorithm };

Default Value

""

Remarks

The key exchange algorithm used in a TLS-enabled connection.

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

Data Type

String

ConnInfoKeyExchangeKeyBits Property (DTLSClient Component)

The length of the key exchange key of a TLS-enabled connection.

Syntax

__property int ConnInfoKeyExchangeKeyBits = { read=FConnInfoKeyExchangeKeyBits };

Default Value

0

Remarks

The length of the key exchange key of a TLS-enabled connection.

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

Data Type

Integer

ConnInfoNamedECCurve Property (DTLSClient Component)

The elliptic curve used in this connection.

Syntax

__property String ConnInfoNamedECCurve = { read=FConnInfoNamedECCurve };

Default Value

""

Remarks

The elliptic curve used in this connection.

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

Data Type

String

ConnInfoPFSCipher Property (DTLSClient Component)

Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS).

Syntax

__property bool ConnInfoPFSCipher = { read=FConnInfoPFSCipher };

Default Value

false

Remarks

Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS).

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

Data Type

Boolean

ConnInfoPreSharedIdentity Property (DTLSClient Component)

Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

Syntax

__property String ConnInfoPreSharedIdentity = { read=FConnInfoPreSharedIdentity };

Default Value

""

Remarks

Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

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

Data Type

String

ConnInfoPreSharedIdentityHint Property (DTLSClient Component)

A hint professed by the server to help the client select the PSK identity to use.

Syntax

__property String ConnInfoPreSharedIdentityHint = { read=FConnInfoPreSharedIdentityHint };

Default Value

""

Remarks

A hint professed by the server to help the client select the PSK identity to use.

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

Data Type

String

ConnInfoPublicKeyBits Property (DTLSClient Component)

The length of the public key.

Syntax

__property int ConnInfoPublicKeyBits = { read=FConnInfoPublicKeyBits };

Default Value

0

Remarks

The length of the public key.

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

Data Type

Integer

ConnInfoRemoteAddress Property (DTLSClient Component)

The client's IP address.

Syntax

__property String ConnInfoRemoteAddress = { read=FConnInfoRemoteAddress };

Default Value

""

Remarks

The client's IP address.

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

Data Type

String

ConnInfoRemotePort Property (DTLSClient Component)

The remote port of the client connection.

Syntax

__property int ConnInfoRemotePort = { read=FConnInfoRemotePort };

Default Value

0

Remarks

The remote port of the client connection.

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

Data Type

Integer

ConnInfoResumedSession Property (DTLSClient Component)

Indicates whether a TLS-enabled connection was spawned from another TLS connection.

Syntax

__property bool ConnInfoResumedSession = { read=FConnInfoResumedSession };

Default Value

false

Remarks

Indicates whether a TLS-enabled connection was spawned from another TLS connection

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

Data Type

Boolean

ConnInfoSecureConnection Property (DTLSClient Component)

Indicates whether TLS or SSL is enabled for this connection.

Syntax

__property bool ConnInfoSecureConnection = { read=FConnInfoSecureConnection };

Default Value

false

Remarks

Indicates whether TLS or SSL is enabled for this connection.

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

Data Type

Boolean

ConnInfoServerAuthenticated Property (DTLSClient Component)

Indicates whether server authentication was performed during a TLS-enabled connection.

Syntax

__property bool ConnInfoServerAuthenticated = { read=FConnInfoServerAuthenticated };

Default Value

false

Remarks

Indicates whether server authentication was performed during a TLS-enabled connection.

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

Data Type

Boolean

ConnInfoSignatureAlgorithm Property (DTLSClient Component)

The signature algorithm used in a TLS handshake.

Syntax

__property String ConnInfoSignatureAlgorithm = { read=FConnInfoSignatureAlgorithm };

Default Value

""

Remarks

The signature algorithm used in a TLS handshake.

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

Data Type

String

ConnInfoSymmetricBlockSize Property (DTLSClient Component)

The block size of the symmetric algorithm used.

Syntax

__property int ConnInfoSymmetricBlockSize = { read=FConnInfoSymmetricBlockSize };

Default Value

0

Remarks

The block size of the symmetric algorithm used.

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

Data Type

Integer

ConnInfoSymmetricKeyBits Property (DTLSClient Component)

The key length of the symmetric algorithm used.

Syntax

__property int ConnInfoSymmetricKeyBits = { read=FConnInfoSymmetricKeyBits };

Default Value

0

Remarks

The key length of the symmetric algorithm used.

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

Data Type

Integer

ConnInfoTotalBytesReceived Property (DTLSClient Component)

The total number of bytes received over this connection.

Syntax

__property __int64 ConnInfoTotalBytesReceived = { read=FConnInfoTotalBytesReceived };

Default Value

0

Remarks

The total number of bytes received over this connection.

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

Data Type

Long64

ConnInfoTotalBytesSent Property (DTLSClient Component)

The total number of bytes sent over this connection.

Syntax

__property __int64 ConnInfoTotalBytesSent = { read=FConnInfoTotalBytesSent };

Default Value

0

Remarks

The total number of bytes sent over this connection.

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

Data Type

Long64

ConnInfoValidationLog Property (DTLSClient Component)

Contains the server certificate's chain validation log.

Syntax

__property String ConnInfoValidationLog = { read=FConnInfoValidationLog };

Default Value

""

Remarks

Contains the server certificate's chain validation log. This information may be very useful in investigating chain validation failures.

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

Data Type

String

ConnInfoVersion Property (DTLSClient Component)

Indicates the version of SSL/TLS protocol negotiated during this connection.

Syntax

__property String ConnInfoVersion = { read=FConnInfoVersion };

Default Value

""

Remarks

Indicates the version of SSL/TLS protocol negotiated during this connection.

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

Data Type

String

ExternalCryptoAsyncDocumentID Property (DTLSClient Component)

Specifies an optional document ID for SignAsyncBegin() and SignAsyncEnd() calls.

Syntax

__property String ExternalCryptoAsyncDocumentID = { read=FExternalCryptoAsyncDocumentID, write=FSetExternalCryptoAsyncDocumentID };

Default Value

""

Remarks

Specifies an optional document ID for SignAsyncBegin() and SignAsyncEnd() calls.

Use this property when working with multi-signature DCAuth requests and responses to uniquely identify documents signed within a larger batch. On the completion stage, this value helps the signing component identify the correct signature in the returned batch of responses.

If using batched requests, make sure to set this property to the same value on both the pre-signing (SignAsyncBegin) and completion (SignAsyncEnd) stages.

Data Type

String

ExternalCryptoCustomParams Property (DTLSClient Component)

Custom parameters to be passed to the signing service (uninterpreted).

Syntax

__property String ExternalCryptoCustomParams = { read=FExternalCryptoCustomParams, write=FSetExternalCryptoCustomParams };

Default Value

""

Remarks

Custom parameters to be passed to the signing service (uninterpreted).

This property is not available at design time.

Data Type

String

ExternalCryptoData Property (DTLSClient Component)

Additional data to be included in the async state and mirrored back by the requestor.

Syntax

__property String ExternalCryptoData = { read=FExternalCryptoData, write=FSetExternalCryptoData };

Default Value

""

Remarks

Additional data to be included in the async state and mirrored back by the requestor.

This property is not available at design time.

Data Type

String

ExternalCryptoExternalHashCalculation Property (DTLSClient Component)

Specifies whether the message hash is to be calculated at the external endpoint.

Syntax

__property bool ExternalCryptoExternalHashCalculation = { read=FExternalCryptoExternalHashCalculation, write=FSetExternalCryptoExternalHashCalculation };

Default Value

false

Remarks

Specifies whether the message hash is to be calculated at the external endpoint. Please note that this mode is not supported by the DCAuth component.

If set to true, the component will pass a few kilobytes of to-be-signed data from the document to the OnExternalSign event. This only applies when SignExternal() is called.

Data Type

Boolean

ExternalCryptoHashAlgorithm Property (DTLSClient Component)

Specifies the request's signature hash algorithm.

Syntax

__property String ExternalCryptoHashAlgorithm = { read=FExternalCryptoHashAlgorithm, write=FSetExternalCryptoHashAlgorithm };

Default Value

"SHA256"

Remarks

Specifies the request's signature hash algorithm.

Data Type

String

ExternalCryptoKeyID Property (DTLSClient Component)

The ID of the pre-shared key used for DC request authentication.

Syntax

__property String ExternalCryptoKeyID = { read=FExternalCryptoKeyID, write=FSetExternalCryptoKeyID };

Default Value

""

Remarks

The ID of the pre-shared key used for DC request authentication.

Asynchronous DCAuth-driven communication requires that parties authenticate each other with a secret pre-shared cryptographic key. This provides an extra protection layer for the protocol and diminishes the risk of the private key becoming abused by foreign parties. Use this property to provide the pre-shared key identifier, and use ExternalCryptoKeySecret to pass the key itself.

The same KeyID/KeySecret pair should be used on the DCAuth side for the signing requests to be accepted.

Note: The KeyID/KeySecret scheme is very similar to the AuthKey scheme used in various Cloud service providers to authenticate users.

Example: signer.ExternalCrypto.KeyID = "MainSigningKey"; signer.ExternalCrypto.KeySecret = "abcdef0123456789";

Data Type

String

ExternalCryptoKeySecret Property (DTLSClient Component)

The pre-shared key used for DC request authentication.

Syntax

__property String ExternalCryptoKeySecret = { read=FExternalCryptoKeySecret, write=FSetExternalCryptoKeySecret };

Default Value

""

Remarks

The pre-shared key used for DC request authentication. This key must be set and match the key used by the DCAuth counterpart for the scheme to work.

Read more about configuring authentication in the ExternalCryptoKeyID topic.

Data Type

String

ExternalCryptoMethod Property (DTLSClient Component)

Specifies the asynchronous signing method.

Syntax

__property TsbxDTLSClientExternalCryptoMethods ExternalCryptoMethod = { read=FExternalCryptoMethod, write=FSetExternalCryptoMethod };

enum TsbxDTLSClientExternalCryptoMethods {
  asmdPKCS1=0,
  asmdPKCS7=1
};

Default Value

asmdPKCS1

Remarks

Specifies the asynchronous signing method. This is typically defined by the DC server capabilities and setup.

Available options:

Data Type

Integer

ExternalCryptoMode Property (DTLSClient Component)

Specifies the external cryptography mode.

Syntax

__property TsbxDTLSClientExternalCryptoModes ExternalCryptoMode = { read=FExternalCryptoMode, write=FSetExternalCryptoMode };

enum TsbxDTLSClientExternalCryptoModes {
  ecmDefault=0,
  ecmDisabled=1,
  ecmGeneric=2,
  ecmDCAuth=3,
  ecmDCAuthJSON=4
};

Default Value

ecmDefault

Remarks

Specifies the external cryptography mode.

Available options:

This property is not available at design time.

Data Type

Integer

ExternalCryptoPublicKeyAlgorithm Property (DTLSClient Component)

Provide the public key algorithm here if the certificate is not available on the pre-signing stage.

Syntax

__property String ExternalCryptoPublicKeyAlgorithm = { read=FExternalCryptoPublicKeyAlgorithm, write=FSetExternalCryptoPublicKeyAlgorithm };

Default Value

""

Remarks

Provide the public key algorithm here if the certificate is not available on the pre-signing stage.

Data Type

String

FIPSMode Property (DTLSClient Component)

Reserved.

Syntax

__property bool FIPSMode = { read=FFIPSMode, write=FSetFIPSMode };

Default Value

false

Remarks

This property is reserved for future use.

Data Type

Boolean

KnownCertCount Property (DTLSClient Component)

The number of records in the KnownCert arrays.

Syntax

__property int KnownCertCount = { read=FKnownCertCount, write=FSetKnownCertCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• KnownCertBytes
• KnownCertHandle

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

This property is not available at design time.

Data Type

Integer

KnownCertBytes Property (DTLSClient Component)

Returns the raw certificate data in DER format.

Syntax

__property DynamicArray KnownCertBytes[int KnownCertIndex] = { read=FKnownCertBytes };

Remarks

Returns the raw certificate data in DER format.

The KnownCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the KnownCertCount property.

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

Data Type

Byte Array

KnownCertHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 KnownCertHandle[int KnownCertIndex] = { read=FKnownCertHandle, write=FSetKnownCertHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The KnownCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the KnownCertCount property.

This property is not available at design time.

Data Type

Long64

KnownCRLCount Property (DTLSClient Component)

The number of records in the KnownCRL arrays.

Syntax

__property int KnownCRLCount = { read=FKnownCRLCount, write=FSetKnownCRLCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• KnownCRLBytes
• KnownCRLHandle

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

This property is not available at design time.

Data Type

Integer

KnownCRLBytes Property (DTLSClient Component)

Returns the raw CRL data in DER format.

Syntax

__property DynamicArray KnownCRLBytes[int KnownCRLIndex] = { read=FKnownCRLBytes };

Remarks

Returns the raw CRL data in DER format.

The KnownCRLIndex parameter specifies the index of the item in the array. The size of the array is controlled by the KnownCRLCount property.

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

Data Type

Byte Array

KnownCRLHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 KnownCRLHandle[int KnownCRLIndex] = { read=FKnownCRLHandle, write=FSetKnownCRLHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The KnownCRLIndex parameter specifies the index of the item in the array. The size of the array is controlled by the KnownCRLCount property.

This property is not available at design time.

Data Type

Long64

KnownOCSPCount Property (DTLSClient Component)

The number of records in the KnownOCSP arrays.

Syntax

__property int KnownOCSPCount = { read=FKnownOCSPCount, write=FSetKnownOCSPCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• KnownOCSPBytes
• KnownOCSPHandle

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

This property is not available at design time.

Data Type

Integer

KnownOCSPBytes Property (DTLSClient Component)

A buffer containing the raw OCSP response data.

Syntax

__property DynamicArray KnownOCSPBytes[int KnownOCSPIndex] = { read=FKnownOCSPBytes };

Remarks

A buffer containing the raw OCSP response data.

The KnownOCSPIndex parameter specifies the index of the item in the array. The size of the array is controlled by the KnownOCSPCount property.

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

Data Type

Byte Array

KnownOCSPHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 KnownOCSPHandle[int KnownOCSPIndex] = { read=FKnownOCSPHandle, write=FSetKnownOCSPHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The KnownOCSPIndex parameter specifies the index of the item in the array. The size of the array is controlled by the KnownOCSPCount property.

This property is not available at design time.

Data Type

Long64

OutputBytes Property (DTLSClient Component)

A memory buffer where the incoming data is collected.

Syntax

__property DynamicArray OutputBytes = { read=FOutputBytes };

Remarks

Use this property to access the cached incoming data after a ReceiveData or ReceiveAllData call.

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

Data Type

Byte Array

OutputString Property (DTLSClient Component)

A string where the incoming data is collected.

Syntax

__property String OutputString = { read=FOutputString };

Default Value

""

Remarks

Use this property to access the stored incoming data in the string interpretation.

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

Data Type

String

SocketDNSMode Property (DTLSClient Component)

Selects the DNS resolver to use: the component's (secure) built-in one, or the one provided by the system.

Syntax

__property TsbxDTLSClientSocketDNSModes SocketDNSMode = { read=FSocketDNSMode, write=FSetSocketDNSMode };

enum TsbxDTLSClientSocketDNSModes {
  dmAuto=0,
  dmPlatform=1,
  dmOwn=2,
  dmOwnSecure=3
};

Default Value

dmAuto

Remarks

Selects the DNS resolver to use: the component's (secure) built-in one, or the one provided by the system.

Data Type

Integer

SocketDNSPort Property (DTLSClient Component)

Specifies the port number to be used for sending queries to the DNS server.

Syntax

__property int SocketDNSPort = { read=FSocketDNSPort, write=FSetSocketDNSPort };

Default Value

0

Remarks

Specifies the port number to be used for sending queries to the DNS server.

Data Type

Integer

SocketDNSQueryTimeout Property (DTLSClient Component)

The timeout (in milliseconds) for each DNS query.

Syntax

__property int SocketDNSQueryTimeout = { read=FSocketDNSQueryTimeout, write=FSetSocketDNSQueryTimeout };

Default Value

0

Remarks

The timeout (in milliseconds) for each DNS query. The value of 0 indicates an infinite timeout.

Data Type

Integer

SocketDNSServers Property (DTLSClient Component)

The addresses of DNS servers to use for address resolution, separated by commas or semicolons.

Syntax

__property String SocketDNSServers = { read=FSocketDNSServers, write=FSetSocketDNSServers };

Default Value

""

Remarks

The addresses of DNS servers to use for address resolution, separated by commas or semicolons.

Data Type

String

SocketDNSTotalTimeout Property (DTLSClient Component)

The timeout (in milliseconds) for the whole resolution process.

Syntax

__property int SocketDNSTotalTimeout = { read=FSocketDNSTotalTimeout, write=FSetSocketDNSTotalTimeout };

Default Value

0

Remarks

The timeout (in milliseconds) for the whole resolution process. The value of 0 indicates an infinite timeout.

Data Type

Integer

SocketIncomingSpeedLimit Property (DTLSClient Component)

The maximum number of bytes to read from the socket, per second.

Syntax

__property int SocketIncomingSpeedLimit = { read=FSocketIncomingSpeedLimit, write=FSetSocketIncomingSpeedLimit };

Default Value

0

Remarks

The maximum number of bytes to read from the socket, per second.

Data Type

Integer

SocketLocalAddress Property (DTLSClient Component)

The local network interface to bind the socket to.

Syntax

__property String SocketLocalAddress = { read=FSocketLocalAddress, write=FSetSocketLocalAddress };

Default Value

""

Remarks

The local network interface to bind the socket to.

Data Type

String

SocketLocalPort Property (DTLSClient Component)

The local port number to bind the socket to.

Syntax

__property int SocketLocalPort = { read=FSocketLocalPort, write=FSetSocketLocalPort };

Default Value

0

Remarks

The local port number to bind the socket to.

Data Type

Integer

SocketOutgoingSpeedLimit Property (DTLSClient Component)

The maximum number of bytes to write to the socket, per second.

Syntax

__property int SocketOutgoingSpeedLimit = { read=FSocketOutgoingSpeedLimit, write=FSetSocketOutgoingSpeedLimit };

Default Value

0

Remarks

The maximum number of bytes to write to the socket, per second.

Data Type

Integer

SocketTimeout Property (DTLSClient Component)

The maximum period of waiting, in milliseconds, after which the socket operation is considered unsuccessful.

Syntax

__property int SocketTimeout = { read=FSocketTimeout, write=FSetSocketTimeout };

Default Value

60000

Remarks

The maximum period of waiting, in milliseconds, after which the socket operation is considered unsuccessful.

If Timeout is set to 0, a socket operation will expire after the system-default timeout (2 hrs 8 min for TCP stack).

Data Type

Integer

SocketUseIPv6 Property (DTLSClient Component)

Enables or disables IP protocol version 6.

Syntax

__property bool SocketUseIPv6 = { read=FSocketUseIPv6, write=FSetSocketUseIPv6 };

Default Value

false

Remarks

Enables or disables IP protocol version 6.

Data Type

Boolean

TLSClientCertCount Property (DTLSClient Component)

The number of records in the TLSClientCert arrays.

Syntax

__property int TLSClientCertCount = { read=FTLSClientCertCount, write=FSetTLSClientCertCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• TLSClientCertBytes
• TLSClientCertHandle

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

This property is not available at design time.

Data Type

Integer

TLSClientCertBytes Property (DTLSClient Component)

Returns the raw certificate data in DER format.

Syntax

__property DynamicArray TLSClientCertBytes[int TLSClientCertIndex] = { read=FTLSClientCertBytes };

Remarks

Returns the raw certificate data in DER format.

The TLSClientCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSClientCertCount property.

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

Data Type

Byte Array

TLSClientCertHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 TLSClientCertHandle[int TLSClientCertIndex] = { read=FTLSClientCertHandle, write=FSetTLSClientCertHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The TLSClientCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSClientCertCount property.

This property is not available at design time.

Data Type

Long64

TLSServerCertCount Property (DTLSClient Component)

The number of records in the TLSServerCert arrays.

Syntax

__property int TLSServerCertCount = { read=FTLSServerCertCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• TLSServerCertBytes
• TLSServerCertFingerprint
• TLSServerCertHandle
• TLSServerCertIssuer
• TLSServerCertIssuerRDN
• TLSServerCertKeyAlgorithm
• TLSServerCertKeyBits
• TLSServerCertKeyUsage
• TLSServerCertSelfSigned
• TLSServerCertSerialNumber
• TLSServerCertSigAlgorithm
• TLSServerCertSubject
• TLSServerCertSubjectRDN
• TLSServerCertValidFrom
• TLSServerCertValidTo

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

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

Data Type

Integer

TLSServerCertBytes Property (DTLSClient Component)

Returns the raw certificate data in DER format.

Syntax

__property DynamicArray TLSServerCertBytes[int TLSServerCertIndex] = { read=FTLSServerCertBytes };

Remarks

Returns the raw certificate data in DER format.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

Byte Array

TLSServerCertFingerprint Property (DTLSClient Component)

Contains the fingerprint (a hash imprint) of this certificate.

Syntax

__property String TLSServerCertFingerprint[int TLSServerCertIndex] = { read=FTLSServerCertFingerprint };

Default Value

""

Remarks

Contains the fingerprint (a hash imprint) of this certificate.

While there is no formal standard defining what a fingerprint is, a SHA1 hash of the certificate's DER-encoded body is typically used.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 TLSServerCertHandle[int TLSServerCertIndex] = { read=FTLSServerCertHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

Long64

TLSServerCertIssuer Property (DTLSClient Component)

The common name of the certificate issuer (CA), typically a company name.

Syntax

__property String TLSServerCertIssuer[int TLSServerCertIndex] = { read=FTLSServerCertIssuer };

Default Value

""

Remarks

The common name of the certificate issuer (CA), typically a company name. This is part of a larger set of credentials available via TLSIssuerRDN.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertIssuerRDN Property (DTLSClient Component)

A list of Property=Value pairs that uniquely identify the certificate issuer.

Syntax

__property String TLSServerCertIssuerRDN[int TLSServerCertIndex] = { read=FTLSServerCertIssuerRDN };

Default Value

""

Remarks

A list of Property=Value pairs that uniquely identify the certificate issuer.

Example: /C=US/O=Nationwide CA/CN=Web Certification Authority

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertKeyAlgorithm Property (DTLSClient Component)

Specifies the public key algorithm of this certificate.

Syntax

__property String TLSServerCertKeyAlgorithm[int TLSServerCertIndex] = { read=FTLSServerCertKeyAlgorithm };

Default Value

"0"

Remarks

Specifies the public key algorithm of this certificate.

Use the TLSKeyBits, TLSCurve, and TLSPublicKeyBytes properties to get more details about the key the certificate contains.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertKeyBits Property (DTLSClient Component)

Returns the length of the public key in bits.

Syntax

__property int TLSServerCertKeyBits[int TLSServerCertIndex] = { read=FTLSServerCertKeyBits };

Default Value

0

Remarks

Returns the length of the public key in bits.

This value indicates the length of the principal cryptographic parameter of the key, such as the length of the RSA modulus or ECDSA field. The key data returned by the TLSPublicKeyBytes or TLSPrivateKeyBytes property would typically contain auxiliary values, and therefore be longer.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

Integer

TLSServerCertKeyUsage Property (DTLSClient Component)

Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set.

Syntax

__property int TLSServerCertKeyUsage[int TLSServerCertIndex] = { read=FTLSServerCertKeyUsage };

Default Value

0

Remarks

Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set.

This value is a bit mask of the following values:

Set this property before generating the certificate to propagate the key usage flags to the new certificate.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

Integer

TLSServerCertSelfSigned Property (DTLSClient Component)

Indicates whether the certificate is self-signed (root) or signed by an external CA.

Syntax

__property bool TLSServerCertSelfSigned[int TLSServerCertIndex] = { read=FTLSServerCertSelfSigned };

Default Value

false

Remarks

Indicates whether the certificate is self-signed (root) or signed by an external CA.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

Boolean

TLSServerCertSerialNumber Property (DTLSClient Component)

Returns the certificate's serial number.

Syntax

__property DynamicArray TLSServerCertSerialNumber[int TLSServerCertIndex] = { read=FTLSServerCertSerialNumber };

Remarks

Returns the certificate's serial number.

The serial number is a binary string that uniquely identifies a certificate among others issued by the same CA. According to the X.509 standard, the (issuer, serial number) pair should be globally unique to facilitate chain building.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

Byte Array

TLSServerCertSigAlgorithm Property (DTLSClient Component)

Indicates the algorithm that was used by the CA to sign this certificate.

Syntax

__property String TLSServerCertSigAlgorithm[int TLSServerCertIndex] = { read=FTLSServerCertSigAlgorithm };

Default Value

""

Remarks

Indicates the algorithm that was used by the CA to sign this certificate.

A signature algorithm typically combines hash and public key algorithms together, such as sha256WithRSAEncryption or ecdsa-with-SHA256.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertSubject Property (DTLSClient Component)

The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name.

Syntax

__property String TLSServerCertSubject[int TLSServerCertIndex] = { read=FTLSServerCertSubject };

Default Value

""

Remarks

The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name. This is part of a larger set of credentials available via TLSSubjectRDN.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertSubjectRDN Property (DTLSClient Component)

A list of Property=Value pairs that uniquely identify the certificate holder (subject).

Syntax

__property String TLSServerCertSubjectRDN[int TLSServerCertIndex] = { read=FTLSServerCertSubjectRDN };

Default Value

""

Remarks

A list of Property=Value pairs that uniquely identify the certificate holder (subject).

Depending on the purpose of the certificate and the policies of the CA that issued it, the values included in the subject record may differ drastically and contain business or personal names, web URLs, email addresses, and other data.

Example: /C=US/O=Oranges and Apples, Inc./OU=Accounts Receivable/1.2.3.4.5=Value with unknown OID/CN=Margaret Watkins.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertValidFrom Property (DTLSClient Component)

The time point at which the certificate becomes valid, in UTC.

Syntax

__property String TLSServerCertValidFrom[int TLSServerCertIndex] = { read=FTLSServerCertValidFrom };

Default Value

""

Remarks

The time point at which the certificate becomes valid, in UTC.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSServerCertValidTo Property (DTLSClient Component)

The time point at which the certificate expires, in UTC.

Syntax

__property String TLSServerCertValidTo[int TLSServerCertIndex] = { read=FTLSServerCertValidTo };

Default Value

""

Remarks

The time point at which the certificate expires, in UTC.

The TLSServerCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TLSServerCertCount property.

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

Data Type

String

TLSAutoValidateCertificates Property (DTLSClient Component)

Specifies whether server-side TLS certificates should be validated automatically using internal validation rules.

Syntax

__property bool TLSAutoValidateCertificates = { read=FTLSAutoValidateCertificates, write=FSetTLSAutoValidateCertificates };

Default Value

true

Remarks

Specifies whether server-side TLS certificates should be validated automatically using internal validation rules.

Data Type

Boolean

TLSBaseConfiguration Property (DTLSClient Component)

Selects the base configuration for the TLS settings.

Syntax

__property TsbxDTLSClientTLSBaseConfigurations TLSBaseConfiguration = { read=FTLSBaseConfiguration, write=FSetTLSBaseConfiguration };

enum TsbxDTLSClientTLSBaseConfigurations {
  stpcDefault=0,
  stpcCompatible=1,
  stpcComprehensiveInsecure=2,
  stpcHighlySecure=3
};

Default Value

stpcDefault

Remarks

Selects the base configuration for the TLS settings. Several profiles are offered and tuned up for different purposes, such as high security or higher compatibility.

Data Type

Integer

TLSCiphersuites Property (DTLSClient Component)

A list of ciphersuites separated with commas or semicolons.

Syntax

__property String TLSCiphersuites = { read=FTLSCiphersuites, write=FSetTLSCiphersuites };

Default Value

""

Remarks

A list of ciphersuites separated with commas or semicolons. Each ciphersuite in the list may be prefixed with a minus sign (-) to indicate that the ciphersuite should be disabled rather than enabled. Besides the specific ciphersuite modifiers, this property supports the all (and -all) aliases, allowing all ciphersuites to be blanketly enabled or disabled at once.

Note: the list of ciphersuites provided to this property alters the baseline list of ciphersuites as defined by TLSBaseConfiguration. Remember to start your ciphersuite string with -all; if you need to only enable a specific fixed set of ciphersuites. The list of supported ciphersuites is provided below:

• NULL_NULL_NULL
• RSA_NULL_MD5
• RSA_NULL_SHA
• RSA_RC4_MD5
• RSA_RC4_SHA
• RSA_RC2_MD5
• RSA_IDEA_MD5
• RSA_IDEA_SHA
• RSA_DES_MD5
• RSA_DES_SHA
• RSA_3DES_MD5
• RSA_3DES_SHA
• RSA_AES128_SHA
• RSA_AES256_SHA
• DH_DSS_DES_SHA
• DH_DSS_3DES_SHA
• DH_DSS_AES128_SHA
• DH_DSS_AES256_SHA
• DH_RSA_DES_SHA
• DH_RSA_3DES_SHA
• DH_RSA_AES128_SHA
• DH_RSA_AES256_SHA
• DHE_DSS_DES_SHA
• DHE_DSS_3DES_SHA
• DHE_DSS_AES128_SHA
• DHE_DSS_AES256_SHA
• DHE_RSA_DES_SHA
• DHE_RSA_3DES_SHA
• DHE_RSA_AES128_SHA
• DHE_RSA_AES256_SHA
• DH_ANON_RC4_MD5
• DH_ANON_DES_SHA
• DH_ANON_3DES_SHA
• DH_ANON_AES128_SHA
• DH_ANON_AES256_SHA
• RSA_RC2_MD5_EXPORT
• RSA_RC4_MD5_EXPORT
• RSA_DES_SHA_EXPORT
• DH_DSS_DES_SHA_EXPORT
• DH_RSA_DES_SHA_EXPORT
• DHE_DSS_DES_SHA_EXPORT
• DHE_RSA_DES_SHA_EXPORT
• DH_ANON_RC4_MD5_EXPORT
• DH_ANON_DES_SHA_EXPORT
• RSA_CAMELLIA128_SHA
• DH_DSS_CAMELLIA128_SHA
• DH_RSA_CAMELLIA128_SHA
• DHE_DSS_CAMELLIA128_SHA
• DHE_RSA_CAMELLIA128_SHA
• DH_ANON_CAMELLIA128_SHA
• RSA_CAMELLIA256_SHA
• DH_DSS_CAMELLIA256_SHA
• DH_RSA_CAMELLIA256_SHA
• DHE_DSS_CAMELLIA256_SHA
• DHE_RSA_CAMELLIA256_SHA
• DH_ANON_CAMELLIA256_SHA
• PSK_RC4_SHA
• PSK_3DES_SHA
• PSK_AES128_SHA
• PSK_AES256_SHA
• DHE_PSK_RC4_SHA
• DHE_PSK_3DES_SHA
• DHE_PSK_AES128_SHA
• DHE_PSK_AES256_SHA
• RSA_PSK_RC4_SHA
• RSA_PSK_3DES_SHA
• RSA_PSK_AES128_SHA
• RSA_PSK_AES256_SHA
• RSA_SEED_SHA
• DH_DSS_SEED_SHA
• DH_RSA_SEED_SHA
• DHE_DSS_SEED_SHA
• DHE_RSA_SEED_SHA
• DH_ANON_SEED_SHA
• SRP_SHA_3DES_SHA
• SRP_SHA_RSA_3DES_SHA
• SRP_SHA_DSS_3DES_SHA
• SRP_SHA_AES128_SHA
• SRP_SHA_RSA_AES128_SHA
• SRP_SHA_DSS_AES128_SHA
• SRP_SHA_AES256_SHA
• SRP_SHA_RSA_AES256_SHA
• SRP_SHA_DSS_AES256_SHA
• ECDH_ECDSA_NULL_SHA
• ECDH_ECDSA_RC4_SHA
• ECDH_ECDSA_3DES_SHA
• ECDH_ECDSA_AES128_SHA
• ECDH_ECDSA_AES256_SHA
• ECDHE_ECDSA_NULL_SHA
• ECDHE_ECDSA_RC4_SHA
• ECDHE_ECDSA_3DES_SHA
• ECDHE_ECDSA_AES128_SHA
• ECDHE_ECDSA_AES256_SHA
• ECDH_RSA_NULL_SHA
• ECDH_RSA_RC4_SHA
• ECDH_RSA_3DES_SHA
• ECDH_RSA_AES128_SHA
• ECDH_RSA_AES256_SHA
• ECDHE_RSA_NULL_SHA
• ECDHE_RSA_RC4_SHA
• ECDHE_RSA_3DES_SHA
• ECDHE_RSA_AES128_SHA
• ECDHE_RSA_AES256_SHA
• ECDH_ANON_NULL_SHA
• ECDH_ANON_RC4_SHA
• ECDH_ANON_3DES_SHA
• ECDH_ANON_AES128_SHA
• ECDH_ANON_AES256_SHA
• RSA_NULL_SHA256
• RSA_AES128_SHA256
• RSA_AES256_SHA256
• DH_DSS_AES128_SHA256
• DH_RSA_AES128_SHA256
• DHE_DSS_AES128_SHA256
• DHE_RSA_AES128_SHA256
• DH_DSS_AES256_SHA256
• DH_RSA_AES256_SHA256
• DHE_DSS_AES256_SHA256
• DHE_RSA_AES256_SHA256
• DH_ANON_AES128_SHA256
• DH_ANON_AES256_SHA256
• RSA_AES128_GCM_SHA256
• RSA_AES256_GCM_SHA384
• DHE_RSA_AES128_GCM_SHA256
• DHE_RSA_AES256_GCM_SHA384
• DH_RSA_AES128_GCM_SHA256
• DH_RSA_AES256_GCM_SHA384
• DHE_DSS_AES128_GCM_SHA256
• DHE_DSS_AES256_GCM_SHA384
• DH_DSS_AES128_GCM_SHA256
• DH_DSS_AES256_GCM_SHA384
• DH_ANON_AES128_GCM_SHA256
• DH_ANON_AES256_GCM_SHA384
• ECDHE_ECDSA_AES128_SHA256
• ECDHE_ECDSA_AES256_SHA384
• ECDH_ECDSA_AES128_SHA256
• ECDH_ECDSA_AES256_SHA384
• ECDHE_RSA_AES128_SHA256
• ECDHE_RSA_AES256_SHA384
• ECDH_RSA_AES128_SHA256
• ECDH_RSA_AES256_SHA384
• ECDHE_ECDSA_AES128_GCM_SHA256
• ECDHE_ECDSA_AES256_GCM_SHA384
• ECDH_ECDSA_AES128_GCM_SHA256
• ECDH_ECDSA_AES256_GCM_SHA384
• ECDHE_RSA_AES128_GCM_SHA256
• ECDHE_RSA_AES256_GCM_SHA384
• ECDH_RSA_AES128_GCM_SHA256
• ECDH_RSA_AES256_GCM_SHA384
• PSK_AES128_GCM_SHA256
• PSK_AES256_GCM_SHA384
• DHE_PSK_AES128_GCM_SHA256
• DHE_PSK_AES256_GCM_SHA384
• RSA_PSK_AES128_GCM_SHA256
• RSA_PSK_AES256_GCM_SHA384
• PSK_AES128_SHA256
• PSK_AES256_SHA384
• PSK_NULL_SHA256
• PSK_NULL_SHA384
• DHE_PSK_AES128_SHA256
• DHE_PSK_AES256_SHA384
• DHE_PSK_NULL_SHA256
• DHE_PSK_NULL_SHA384
• RSA_PSK_AES128_SHA256
• RSA_PSK_AES256_SHA384
• RSA_PSK_NULL_SHA256
• RSA_PSK_NULL_SHA384
• RSA_CAMELLIA128_SHA256
• DH_DSS_CAMELLIA128_SHA256
• DH_RSA_CAMELLIA128_SHA256
• DHE_DSS_CAMELLIA128_SHA256
• DHE_RSA_CAMELLIA128_SHA256
• DH_ANON_CAMELLIA128_SHA256
• RSA_CAMELLIA256_SHA256
• DH_DSS_CAMELLIA256_SHA256
• DH_RSA_CAMELLIA256_SHA256
• DHE_DSS_CAMELLIA256_SHA256
• DHE_RSA_CAMELLIA256_SHA256
• DH_ANON_CAMELLIA256_SHA256
• ECDHE_ECDSA_CAMELLIA128_SHA256
• ECDHE_ECDSA_CAMELLIA256_SHA384
• ECDH_ECDSA_CAMELLIA128_SHA256
• ECDH_ECDSA_CAMELLIA256_SHA384
• ECDHE_RSA_CAMELLIA128_SHA256
• ECDHE_RSA_CAMELLIA256_SHA384
• ECDH_RSA_CAMELLIA128_SHA256
• ECDH_RSA_CAMELLIA256_SHA384
• RSA_CAMELLIA128_GCM_SHA256
• RSA_CAMELLIA256_GCM_SHA384
• DHE_RSA_CAMELLIA128_GCM_SHA256
• DHE_RSA_CAMELLIA256_GCM_SHA384
• DH_RSA_CAMELLIA128_GCM_SHA256
• DH_RSA_CAMELLIA256_GCM_SHA384
• DHE_DSS_CAMELLIA128_GCM_SHA256
• DHE_DSS_CAMELLIA256_GCM_SHA384
• DH_DSS_CAMELLIA128_GCM_SHA256
• DH_DSS_CAMELLIA256_GCM_SHA384
• DH_anon_CAMELLIA128_GCM_SHA256
• DH_anon_CAMELLIA256_GCM_SHA384
• ECDHE_ECDSA_CAMELLIA128_GCM_SHA256
• ECDHE_ECDSA_CAMELLIA256_GCM_SHA384
• ECDH_ECDSA_CAMELLIA128_GCM_SHA256
• ECDH_ECDSA_CAMELLIA256_GCM_SHA384
• ECDHE_RSA_CAMELLIA128_GCM_SHA256
• ECDHE_RSA_CAMELLIA256_GCM_SHA384
• ECDH_RSA_CAMELLIA128_GCM_SHA256
• ECDH_RSA_CAMELLIA256_GCM_SHA384
• PSK_CAMELLIA128_GCM_SHA256
• PSK_CAMELLIA256_GCM_SHA384
• DHE_PSK_CAMELLIA128_GCM_SHA256
• DHE_PSK_CAMELLIA256_GCM_SHA384
• RSA_PSK_CAMELLIA128_GCM_SHA256
• RSA_PSK_CAMELLIA256_GCM_SHA384
• PSK_CAMELLIA128_SHA256
• PSK_CAMELLIA256_SHA384
• DHE_PSK_CAMELLIA128_SHA256
• DHE_PSK_CAMELLIA256_SHA384
• RSA_PSK_CAMELLIA128_SHA256
• RSA_PSK_CAMELLIA256_SHA384
• ECDHE_PSK_CAMELLIA128_SHA256
• ECDHE_PSK_CAMELLIA256_SHA384
• ECDHE_PSK_RC4_SHA
• ECDHE_PSK_3DES_SHA
• ECDHE_PSK_AES128_SHA
• ECDHE_PSK_AES256_SHA
• ECDHE_PSK_AES128_SHA256
• ECDHE_PSK_AES256_SHA384
• ECDHE_PSK_NULL_SHA
• ECDHE_PSK_NULL_SHA256
• ECDHE_PSK_NULL_SHA384
• ECDHE_RSA_CHACHA20_POLY1305_SHA256
• ECDHE_ECDSA_CHACHA20_POLY1305_SHA256
• DHE_RSA_CHACHA20_POLY1305_SHA256
• PSK_CHACHA20_POLY1305_SHA256
• ECDHE_PSK_CHACHA20_POLY1305_SHA256
• DHE_PSK_CHACHA20_POLY1305_SHA256
• RSA_PSK_CHACHA20_POLY1305_SHA256
• AES128_GCM_SHA256
• AES256_GCM_SHA384
• CHACHA20_POLY1305_SHA256
• AES128_CCM_SHA256
• AES128_CCM8_SHA256

Data Type

String

TLSClientAuth Property (DTLSClient Component)

Enables or disables certificate-based client authentication.

Syntax

__property TsbxDTLSClientTLSClientAuths TLSClientAuth = { read=FTLSClientAuth, write=FSetTLSClientAuth };

enum TsbxDTLSClientTLSClientAuths {
  ccatNoAuth=0,
  ccatRequestCert=1,
  ccatRequireCert=2
};

Default Value

ccatNoAuth

Remarks

Enables or disables certificate-based client authentication.

Set this property to true to tune up the client authentication type:

Data Type

Integer

TLSECCurves Property (DTLSClient Component)

Defines the elliptic curves to enable.

Syntax

__property String TLSECCurves = { read=FTLSECCurves, write=FSetTLSECCurves };

Default Value

""

Remarks

Defines the elliptic curves to enable.

Data Type

String

TLSExtensions Property (DTLSClient Component)

Provides access to TLS extensions.

Syntax

__property String TLSExtensions = { read=FTLSExtensions, write=FSetTLSExtensions };

Default Value

""

Remarks

Provides access to TLS extensions.

Data Type

String

TLSForceResumeIfDestinationChanges Property (DTLSClient Component)

Whether to force TLS session resumption when the destination address changes.

Syntax

__property bool TLSForceResumeIfDestinationChanges = { read=FTLSForceResumeIfDestinationChanges, write=FSetTLSForceResumeIfDestinationChanges };

Default Value

false

Remarks

Whether to force TLS session resumption when the destination address changes.

Data Type

Boolean

TLSPreSharedIdentity Property (DTLSClient Component)

Defines the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

Syntax

__property String TLSPreSharedIdentity = { read=FTLSPreSharedIdentity, write=FSetTLSPreSharedIdentity };

Default Value

""

Remarks

Defines the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

This property is not available at design time.

Data Type

String

TLSPreSharedKey Property (DTLSClient Component)

Contains the pre-shared key for the PSK (Pre-Shared Key) key-exchange mechanism, encoded with base16.

Syntax

__property String TLSPreSharedKey = { read=FTLSPreSharedKey, write=FSetTLSPreSharedKey };

Default Value

""

Remarks

Contains the pre-shared key for the PSK (Pre-Shared Key) key-exchange mechanism, encoded with base16.

This property is not available at design time.

Data Type

String

TLSPreSharedKeyCiphersuite Property (DTLSClient Component)

Defines the ciphersuite used for PSK (Pre-Shared Key) negotiation.

Syntax

__property String TLSPreSharedKeyCiphersuite = { read=FTLSPreSharedKeyCiphersuite, write=FSetTLSPreSharedKeyCiphersuite };

Default Value

""

Remarks

Defines the ciphersuite used for PSK (Pre-Shared Key) negotiation.

Data Type

String

TLSRenegotiationAttackPreventionMode Property (DTLSClient Component)

Selects the renegotiation attack prevention mechanism.

Syntax

__property TsbxDTLSClientTLSRenegotiationAttackPreventionModes TLSRenegotiationAttackPreventionMode = { read=FTLSRenegotiationAttackPreventionMode, write=FSetTLSRenegotiationAttackPreventionMode };

enum TsbxDTLSClientTLSRenegotiationAttackPreventionModes {
  crapmCompatible=0,
  crapmStrict=1,
  crapmAuto=2
};

Default Value

crapmAuto

Remarks

Selects the renegotiation attack prevention mechanism.

The following options are available:

Data Type

Integer

TLSRevocationCheck Property (DTLSClient Component)

Specifies the kind(s) of revocation check to perform.

Syntax

__property TsbxDTLSClientTLSRevocationChecks TLSRevocationCheck = { read=FTLSRevocationCheck, write=FSetTLSRevocationCheck };

enum TsbxDTLSClientTLSRevocationChecks {
  crcNone=0,
  crcAuto=1,
  crcAllCRL=2,
  crcAllOCSP=3,
  crcAllCRLAndOCSP=4,
  crcAnyCRL=5,
  crcAnyOCSP=6,
  crcAnyCRLOrOCSP=7,
  crcAnyOCSPOrCRL=8
};

Default Value

crcAuto

Remarks

Specifies the kind(s) of revocation check to perform.

Revocation checking is necessary to ensure the integrity of the chain and obtain up-to-date certificate validity and trustworthiness information.

This setting controls the way the revocation checks are performed for every certificate in the chain. Typically certificates come with two types of revocation information sources: CRL (certificate revocation lists) and OCSP responders. CRLs are static objects periodically published by the CA at some online location. OCSP responders are active online services maintained by the CA that can provide up-to-date information on certificate statuses in near real time.

There are some conceptual differences between the two. CRLs are normally larger in size. Their use involves some latency because there is normally some delay between the time when a certificate was revoked and the time the subsequent CRL mentioning that is published. The benefits of CRL is that the same object can provide statuses for all certificates issued by a particular CA, and that the whole technology is much simpler than OCSP (and thus is supported by more CAs).

This setting lets you adjust the validation course by including or excluding certain types of revocation sources from the validation process. The crcAnyOCSPOrCRL setting (give preference to the faster OCSP route and only demand one source to succeed) is a good choice for most typical validation environments. The "crcAll*" modes are much stricter, and may be used in scenarios where bulletproof validity information is essential.

Note: If no CRL or OCSP endpoints are provided by the CA, the revocation check will be considered successful. This is because the CA chose not to supply revocation information for its certificates, meaning they are considered irrevocable.

Note: Within each of the above settings, if any retrieved CRL or OCSP response indicates that the certificate has been revoked, the revocation check fails.

This property is not available at design time.

Data Type

Integer

TLSSSLOptions Property (DTLSClient Component)

Various SSL (TLS) protocol options, set of cssloExpectShutdownMessage 0x001 Wait for the close-notify message when shutting down the connection cssloOpenSSLDTLSWorkaround 0x002 (DEPRECATED) Use a DTLS version workaround when talking to very old OpenSSL versions cssloDisableKexLengthAlignment 0x004 Do not align the client-side PMS by the RSA modulus size.

Syntax

__property int TLSSSLOptions = { read=FTLSSSLOptions, write=FSetTLSSSLOptions };

Default Value

16

Remarks

Various SSL (TLS) protocol options, set of

Data Type

Integer

TLSTLSMode Property (DTLSClient Component)

Specifies the TLS mode to use.

Syntax

__property TsbxDTLSClientTLSTLSModes TLSTLSMode = { read=FTLSTLSMode, write=FSetTLSTLSMode };

enum TsbxDTLSClientTLSTLSModes {
  smDefault=0,
  smNoTLS=1,
  smExplicitTLS=2,
  smImplicitTLS=3,
  smMixedTLS=4
};

Default Value

smDefault

Remarks

Specifies the TLS mode to use.

Data Type

Integer

TLSUseExtendedMasterSecret Property (DTLSClient Component)

Enables the Extended Master Secret Extension, as defined in RFC 7627.

Syntax

__property bool TLSUseExtendedMasterSecret = { read=FTLSUseExtendedMasterSecret, write=FSetTLSUseExtendedMasterSecret };

Default Value

false

Remarks

Enables the Extended Master Secret Extension, as defined in RFC 7627.

Data Type

Boolean

TLSUseSessionResumption Property (DTLSClient Component)

Enables or disables the TLS session resumption capability.

Syntax

__property bool TLSUseSessionResumption = { read=FTLSUseSessionResumption, write=FSetTLSUseSessionResumption };

Default Value

false

Remarks

Enables or disables the TLS session resumption capability.

Data Type

Boolean

TLSVersions Property (DTLSClient Component)

The SSL/TLS versions to enable by default.

Syntax

__property int TLSVersions = { read=FTLSVersions, write=FSetTLSVersions };

Default Value

16

Remarks

The SSL/TLS versions to enable by default.

Data Type

Integer

TrustedCertCount Property (DTLSClient Component)

The number of records in the TrustedCert arrays.

Syntax

__property int TrustedCertCount = { read=FTrustedCertCount, write=FSetTrustedCertCount };

Default Value

0

Remarks

This property controls the size of the following arrays:

• TrustedCertBytes
• TrustedCertHandle

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

This property is not available at design time.

Data Type

Integer

TrustedCertBytes Property (DTLSClient Component)

Returns the raw certificate data in DER format.

Syntax

__property DynamicArray TrustedCertBytes[int TrustedCertIndex] = { read=FTrustedCertBytes };

Remarks

Returns the raw certificate data in DER format.

The TrustedCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TrustedCertCount property.

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

Data Type

Byte Array

TrustedCertHandle Property (DTLSClient Component)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

__property __int64 TrustedCertHandle[int TrustedCertIndex] = { read=FTrustedCertHandle, write=FSetTrustedCertHandle };

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

The TrustedCertIndex parameter specifies the index of the item in the array. The size of the array is controlled by the TrustedCertCount property.

This property is not available at design time.

Data Type

Long64

Config Method (DTLSClient Component)

Sets or retrieves a configuration setting.

Syntax

String __fastcall Config(String ConfigurationString);

Remarks

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

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

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

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Connect Method (DTLSClient Component)

Establishes connection to a remote server.

Syntax

void __fastcall Connect(String Address, int Port);

Remarks

Call this method to establish connection to a DTLS server at Address:Port.

Disconnect Method (DTLSClient Component)

Disconnects from the server.

Syntax

void __fastcall Disconnect();

Remarks

Call this method to close an active connection to the server.

DoAction Method (DTLSClient Component)

Performs an additional action.

Syntax

String __fastcall DoAction(String ActionID, String ActionParams);

Remarks

DoAction is a generic method available in every component. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.

The unique identifier (case insensitive) of the action is provided in the ActionID parameter.

ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....

Common ActionIDs:

ExportKeyMaterial Method (DTLSClient Component)

Derives key material from the session's master key using the TLS exporters scheme.

Syntax

void __fastcall ExportKeyMaterial(String Lbl, DynamicArray<Byte> Context, int Len);

Remarks

Some protocols - for example, SRTP - use TLS exporters to derive their own session keys from the TLS master key. This method lets you employ the exporters scheme to obtain such keys, or to generate secure keys for your own needs from the current TLS session.

The exported keys depend on the master key, and are different for every TLS session. However, a client and server sharing a session will always end up with the same key material, as long as they use the same values of Lbl, Context, and Len.

ProcessPlainData Method (DTLSClient Component)

Process a buffer to the server.

Syntax

void __fastcall ProcessPlainData(DynamicArray<Byte> Buffer);

Remarks

Use this method to process a byte array to the server.

ReceiveAllData Method (DTLSClient Component)

Reads data from the connection.

Syntax

void __fastcall ReceiveAllData(int Size);

Remarks

Use this method to read Size bytes from the connection. The method will block until the requested number of bytes is received.

Use OutputBytes (or OutputString) to access the received data.

Use ReceiveData method to read all the data there is and return without waiting for the whole piece.

ReceiveData Method (DTLSClient Component)

Reads data from the connection.

Syntax

void __fastcall ReceiveData(int Size);

Remarks

Use this method to read Size or less bytes from the connection. The method will read as much data is possible (but no more than Size) and return without blocking.

Use OutputBytes (or OutputString) to access the received data.

ReceivePlainData Method (DTLSClient Component)

Reads plain data from the connection.

Syntax

void __fastcall ReceivePlainData(int Size, bool ReceiveAll);

Remarks

Use this method to read Size or less (if ReceiveAll is set to false) bytes of plain (unencrypted/second channel) data from the connection. This method is useful where the other party sends both DTLS and non-DTLS data simultaneously over the same chanel, as it is done, for example, in SRTP protocol.

If ReceiveAll is false, the method will read as much data is possible (but no more than Size) and return without blocking. Otherwise, the method will block until the whole Size-byte block is read.

Use OutputBytes (or OutputString) to access the received data.

Reset Method (DTLSClient Component)

Resets the component settings.

Syntax

void __fastcall Reset();

Remarks

Reset is a generic method available in every component.

SendData Method (DTLSClient Component)

Sends a buffer to the server.

Syntax

void __fastcall SendData(DynamicArray<Byte> Buffer);

Remarks

Use this method to send a byte array to the server.

SendKeepAlive Method (DTLSClient Component)

Sends a keep-alive packet.

Syntax

void __fastcall SendKeepAlive();

Remarks

Use this method to send a keep-alive packet to the server. Keep alive is an empty packet; keep-alive signals sent occasionally can be used to keep connection up.

SendPlainData Method (DTLSClient Component)

Sends a buffer to the server.

Syntax

void __fastcall SendPlainData(DynamicArray<Byte> Buffer);

Remarks

Use this method to send a byte array to the server.

SendText Method (DTLSClient Component)

Sends a text string to the server.

Syntax

void __fastcall SendText(String Text);

Remarks

Use this method to send a text string to the server.

StartTLS Method (DTLSClient Component)

Starts TLS negotiation on an established UDP link.

Syntax

void __fastcall StartTLS();

Remarks

Use this method to initiate a TLS handshake on a plain UDP link. This method is handy for establishing explicit DTLS connections manually.

StopTLS Method (DTLSClient Component)

Downgrades the protected connection to plain UDP.

Syntax

void __fastcall StopTLS(bool Quiet);

Remarks

Use this method to make the component stop encrypting session data with TLS and downgrade the connection to plain unencrypted UDP. Use the Quiet parameter to suppress sending of the close_notify alert upon closing the TLS session.

Error Event (DTLSClient Component)

Information about errors during data delivery.

Syntax

typedef struct {
  int ErrorCode;
  bool Fatal;
  bool Remote;
  String Description;
} TsbxDTLSClientErrorEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientErrorEvent)(System::TObject* Sender, TsbxDTLSClientErrorEventParams *e);
__property TsbxDTLSClientErrorEvent OnError = { read=FOnError, write=FOnError };

Remarks

The event is fired in case of exceptional conditions during message processing.

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 HTTPS section.

ExternalSign Event (DTLSClient Component)

Handles remote or external signing initiated by the SignExternal method or other source.

Syntax

typedef struct {
  String OperationId;
  String HashAlgorithm;
  String Pars;
  String Data;
  String SignedData;
} TsbxDTLSClientExternalSignEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientExternalSignEvent)(System::TObject* Sender, TsbxDTLSClientExternalSignEventParams *e);
__property TsbxDTLSClientExternalSignEvent OnExternalSign = { read=FOnExternalSign, write=FOnExternalSign };

Remarks

Assign a handler to this event if you need to delegate a low-level signing operation to an external, remote, or custom signing engine. Depending on the settings, the handler will receive a hashed or unhashed value to be signed.

The event handler must pass the value of Data to the signer, obtain the signature, and pass it back to the component via the SignedData parameter.

OperationId provides a comment about the operation and its origin. It depends on the exact component being used, and may be empty. HashAlgorithm specifies the hash algorithm being used for the operation, and Pars contains algorithm-dependent parameters.

The component uses base16 (hex) encoding for the Data, SignedData, and Pars parameters. If your signing engine uses a different input and output encoding, you may need to decode and/or encode the data before and/or after the signing.

A sample MD5 hash encoded in base16: a0dee2a0382afbb09120ffa7ccd8a152 - lower case base16 A0DEE2A0382AFBB09120FFA7CCD8A152 - upper case base16

A sample event handler that uses the .NET RSACryptoServiceProvider class may look like the following: signer.OnExternalSign += (s, e) => { var cert = new X509Certificate2("cert.pfx", "", X509KeyStorageFlags.Exportable); var key = (RSACryptoServiceProvider)cert.PrivateKey; var dataToSign = e.Data.FromBase16String(); var signedData = key.SignHash(dataToSign, "2.16.840.1.101.3.4.2.1"); e.SignedData = signedData.ToBase16String(); };

Notification Event (DTLSClient Component)

This event notifies the application about an underlying control flow event.

Syntax

typedef struct {
  String EventID;
  String EventParam;
} TsbxDTLSClientNotificationEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientNotificationEvent)(System::TObject* Sender, TsbxDTLSClientNotificationEventParams *e);
__property TsbxDTLSClientNotificationEvent OnNotification = { read=FOnNotification, write=FOnNotification };

Remarks

The component fires this event to let the application know about some event, occurrence, or milestone in the component. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.

The unique identifier of the event is provided in the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the component, the exact action it is performing, or the document being processed, one or both may be omitted.

This component can fire this event with the following EventID values:

TLSCertNeeded Event (DTLSClient Component)

Fires when a remote TLS party requests a client certificate.

Syntax

typedef struct {
  String Host;
  String CANames;
} TsbxDTLSClientTLSCertNeededEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientTLSCertNeededEvent)(System::TObject* Sender, TsbxDTLSClientTLSCertNeededEventParams *e);
__property TsbxDTLSClientTLSCertNeededEvent OnTLSCertNeeded = { read=FOnTLSCertNeeded, write=FOnTLSCertNeeded };

Remarks

This event fires to notify the implementation that a remote TLS server has requested a client certificate. The Host parameter identifies the host that makes a request, and the CANames parameter (optional, according to the TLS spec) advises on the accepted issuing CAs.

Use the TLSClientChain property in response to this event to provide the requested certificate. Please make sure the client certificate includes the associated private key. Note that you may set the certificates before the connection without waiting for this event to fire.

This event is preceded by the TLSHandshake event for the given host and, if the certificate was accepted, succeeded by the TLSEstablished event.

TLSCertValidate Event (DTLSClient Component)

This event is fired upon receipt of the TLS server's certificate, allowing the user to control its acceptance.

Syntax

typedef struct {
  String ServerHost;
  String ServerIP;
  bool Accept;
} TsbxDTLSClientTLSCertValidateEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientTLSCertValidateEvent)(System::TObject* Sender, TsbxDTLSClientTLSCertValidateEventParams *e);
__property TsbxDTLSClientTLSCertValidateEvent OnTLSCertValidate = { read=FOnTLSCertValidate, write=FOnTLSCertValidate };

Remarks

This event is fired during a TLS handshake. Use the TLSServerChain property to access the certificate chain. In general, components may contact a number of TLS endpoints during their work, depending on their configuration.

Accept is assigned in accordance with the outcome of the internal validation check performed by the component, and can be adjusted if needed.

TLSEstablished Event (DTLSClient Component)

Fires when a TLS handshake with Host successfully completes.

Syntax

typedef struct {
  String Host;
  String Version;
  String Ciphersuite;
  DynamicArray ConnectionId;
  bool Abort;
} TsbxDTLSClientTLSEstablishedEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientTLSEstablishedEvent)(System::TObject* Sender, TsbxDTLSClientTLSEstablishedEventParams *e);
__property TsbxDTLSClientTLSEstablishedEvent OnTLSEstablished = { read=FOnTLSEstablished, write=FOnTLSEstablished };

Remarks

The component uses this event to notify the application about a successful completion of a TLS handshake.

The Version, Ciphersuite, and ConnectionId parameters indicate the security parameters of the new connection. Use the Abort parameter if you need to terminate the connection at this stage.

TLSHandshake Event (DTLSClient Component)

Fires when a new TLS handshake is initiated, before the handshake commences.

Syntax

typedef struct {
  String Host;
  bool Abort;
} TsbxDTLSClientTLSHandshakeEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientTLSHandshakeEvent)(System::TObject* Sender, TsbxDTLSClientTLSHandshakeEventParams *e);
__property TsbxDTLSClientTLSHandshakeEvent OnTLSHandshake = { read=FOnTLSHandshake, write=FOnTLSHandshake };

Remarks

The component uses this event to notify the application about the start of a new TLS handshake to Host. If the handshake is successful, this event will be followed by the TLSEstablished event. If the server chooses to request a client certificate, the TLSCertNeeded event will also be fired.

TLSPSK Event (DTLSClient Component)

Notifies the application about the PSK key exchange.

Syntax

typedef struct {
  String Host;
  String Hint;
} TsbxDTLSClientTLSPSKEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientTLSPSKEvent)(System::TObject* Sender, TsbxDTLSClientTLSPSKEventParams *e);
__property TsbxDTLSClientTLSPSKEvent OnTLSPSK = { read=FOnTLSPSK, write=FOnTLSPSK };

Remarks

The component fires this event to notify the application about the beginning of TLS-PSK key exchange with Host. The Hint parameter may be used by the server to identify the key or service to use. Use the PreSharedKey field of TLSSettings to provide the pre-shared key to the component.

TLSShutdown Event (DTLSClient Component)

Reports the graceful closure of a TLS connection.

Syntax

typedef struct {
  String Host;
} TsbxDTLSClientTLSShutdownEventParams;
typedef void __fastcall (__closure *TsbxDTLSClientTLSShutdownEvent)(System::TObject* Sender, TsbxDTLSClientTLSShutdownEventParams *e);
__property TsbxDTLSClientTLSShutdownEvent OnTLSShutdown = { read=FOnTLSShutdown, write=FOnTLSShutdown };

Remarks

This event notifies the application about the closure of an earlier established TLS connection. Note that only graceful connection closures are reported.

Config Settings (DTLSClient Component)

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

DTLSClient Config Settings

Base Config Settings

Trappable Errors (DTLSClient Component)