LOCLASS, is a two part attack. First is the online part where you gather needed information from the reader by presenting a carefully selected CSN and save the responses to file. For the first part you run `hf iclass sim 2` and take notice of the saved filename.
The second part is offline, where the information gathered from the first step is used in a series of DES operations to figure out the used
this is a sample file from `hf iclass sim 2`, with complete keytable recovery, using 128 carefully selected CSN and the file contains the MAC results from reader.