DataGroup

internal class DataGroup

DataGroup is an abstract class that represents a data group, which is a container for structured data stored in ASN.1 format.

Within the LDS (Logical Data Structure), logical groupings of related Data Elements have been established. These logical groupings are referred to as Data Groups.

Note

This class is extended and the decode(_:) function is overrided to retrieve needed data for the specific Data Group.

See also

COM, DataGroup1, DataGroup2, DataGroup7, DataGroup11 DataGroup12, DataGroup14 and SOD

  • The identifier of the data group.

    Declaration

    Swift

    internal var identifier: DGTag!

  • The structured data stored in ASN.1 format.

    Data follows the ASN.1 (Abstract Syntax Notation One) notation so data is divided into the TLV (Tag/Type - Length - Value) format, where:

    • Tag/Type identifies the type of encoded data
    • Length specifies the length in bytes of the value

    • Value is the actual data

    Note

    It contains the whole Data Group data and that is what the hash for PassiveAuthenticationHandler is calculated from.

    Declaration

    Swift

    private(set) var data: ASN1Node! { get }

  • Initializes a new instance of a data group.

    Throws

    An error if decoding the data group fails.

    Declaration

    Swift

    internal required init(_ data: ASN1Node, identifier: DGTag) throws

    Parameters

    data

    The ASN.1 encoded data for the data group.
    identifier

    The identifier specifying the type of the data group.

  • Decodes the data within the data group. Subclasses should override this method to perform specific decoding.

    Throws

    An error if decoding the data fails.

    Declaration

    Swift

    internal func decode(_ data: ASN1Node) throws

    Parameters

    data

    The ASN.1 encoded data for the data group.