MacComponent class

Builds the MAC over the selected fields and writes it into field 64.

Ported from MACComponent. The field list, the pack/unpack round trip that normalises each value, and the "init logon uses the default MAC key" rule are all reproduced exactly — a single byte out of place and the host rejects the message.

Constructors

MacComponent({required HostConfig config, required IsoSecurityModule securityModule})

Properties

config → HostConfig

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

securityModule → IsoSecurityModule

final

Methods

buildMacData(IsoMsg message) → Uint8List

Packs the selected fields, unpacks them again, then concatenates the normalised values. The round trip is what makes the terminal and the host agree on padding.

checkMac(IsoMsg message, int macLength) → Future<bool>

Recomputes the MAC over the response and compares. The MAC field is removed only when it matched, as in the Java, so a failed check leaves the message untouched for logging.

generateMac(IsoMsg message, int macLength) → Future<void>

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

usesDefaultMac(IsoMsg message) → bool

Init logon (0800/0810 with processing code 920000 or 920001) is MACed with the key derived from the KTM; everything else uses the session MAC key.

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

selectedFields → const List<int>