Automatic validation for SLN/keyset pairs

[ilyacodes]

Per TIA-102.AACA-C 6.1 Keyset Definition and Operation:

The SLN is a two octet number made from the concatenation of the Crypto Group (upper 4 bits numbered 0 through 15), followed by 12 bits for the Key Number (numbered 0 through 4095), and may take on a value within the range of zero to 65,535.

The Keyset ID is a one octet field defined by the concatenation of the Crypto Group (upper 4 bits) and the keyset (lower 4 bits). Note that a value of 0 is not a valid Keyset ID so an offset of 1 is added to the concatenated value to create a Keyset ID range of 1 through 255.

Currently KFDtool does not track the connection between the upper nibble of SLN/CKR and the upper nibble of the keyset... i.e. it is possible to try to load a key with an SLN that is associated with crypto group $0 into a keyset that is associated with crypto group $F.

It would be nice to add automatic validation for invalid SLN/keyset pairs.