GetMacTransferSyntax Method

Returns the Message Authentication Code (MAC) Calculation Transfer Syntax UID (0400,0010) used in the creation of the specified Digital Signature.

Syntax

public string GetMacTransferSyntax( 
   DicomElement signatureItem
)

public string GetMacTransferSyntax( 
   DicomElement signatureItem
)

ObjectiveC Syntax

 function Leadtools.Dicom.DicomDataSet.GetMacTransferSyntax( 
   signatureItem 
)

public:
String^ GetMacTransferSyntax( 
   DicomElement^ signatureItem
)

'Declaration
 
Public Function GetMacTransferSyntax( _
   ByVal signatureItem As DicomElement _
) As String

'Usage
 
Dim instance As DicomDataSet
Dim signatureItem As DicomElement
Dim value As String
 
value = instance.GetMacTransferSyntax(signatureItem)

Parameters

signatureItem: The Digital Signatures Sequence Item that corresponds to the Digital Signature. This cannot be null.

Return Value

The MAC Calculation Transfer Syntax UID (0400,0010) used in the creation of the specified Digital Signature. The return value can be a null reference (Nothing in Visual Basic).

Remarks

The Digital Signatures Sequence Item of a Digital Signature should reference an item under the MAC Parameters Sequence associated with the Digital Signatures Sequence. The MAC Calculation Transfer Syntax UID (0400,0010) under the referenced MAC Parameters Sequence Item specifies the Transfer Syntax used in the calculation of the Message Authentication Code (MAC). The encrypted MAC is the digital signature itself. Call this method to obtain the value of this Data Element.

If the Data Set was properly encoded, the return value will be a Transfer Syntax that Explicitly includes the Value Representation (VR) and uses Little Endian encoding.

The following methods can also be used to get information about the Digital Signature:

GetSignatureUID

GetSignatureDateTime

GetSignedElementsCount

GetSignedElement

GetMacAlgorithm

SaveCertificate

Example

For an example, refer to VerifySignature.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DicomDataSet Class
DicomDataSet Members
GetSignature Method
FindSignature Method
GetSignatureUID Method
GetSignatureDateTime Method
GetSignedElementsCount Method
GetSignedElement Method
GetMacAlgorithm Method
SaveCertificate Method