Reference Manual


VhlCfg / File / MifarePlusMadKeyBIndex Value

This entry is only needed for running VHL-Format(). If MAD encoding is enabled (MAD_AID does exist), this value contains a 2 byte index to the write key (Key B) of the MAD. This key is needed by VHL-Format() to create the MAD or to adapt the MAD when adding a new application. If MAD encoding is not enabled, this value may be omitted. This value is used by Mifare plus firmware only. For Mifare classic firmware use MifareClassicMadKeyB instead.

Properties

Format

Name Type/Size Description
MadKeyBMemoryType Enumeration (8 bits) This value references a key memory type within the reader. VHL detects the security level (SL0..3) of a Mifare classic/plus card automatically and according to the security level the adequate key memories (AES and/or Mifare keys) are chosen. For some key memory types a card in Mifare plus security level 2 (SL2) needs both keys (AES and Mifare): then the configuration value MifarePlusKeyIdxOffset describes an offset of Mifare keys to AES keys (! signed value).
Values:
  • CryptoKey (0x00)
    References keys within the CryptoKey memory.
    Key offset needed: refer to MifarePlusKeyIdxOffset
  • SamKey (0x01)
    References keys within a SAM, only available on SAM based readers: key index from 0x00 to 0x7F, a SAM key contains up to 3 AES keys with different versions or 3 Mifare key pairs (A and B). VHL uses always the first SAM key.
    Key offset needed: see MifarePlusKeyIdxOffset
  • ReaderChipKey (0x02)
    References keys which are stored in reader chip memory: 32 keys (index 0..31) are available. This memory contains only keys for Mifare classic cards (SL1).
  • VhlKey (0x03)
    References keys which are defined in respective VHL files:
    AES keys in MifarePlusAesKeyList
    Mifare keys in MifareKeyList
MadKeyBIdx Integer (8 bits) Index to key: first key in list will be accessed with value 0, second with 1...