mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-14 13:44:49 +08:00
26 lines
No EOL
1.3 KiB
Markdown
26 lines
No EOL
1.3 KiB
Markdown
# About LOCLASS attack
|
|
|
|
This document is primarily intended for understanding `hf iclass loclass` and files used with it.
|
|
|
|
LOCLASS aim is to recover the used masterkey for that specific reader configured in Elite mode / High Security mode.
|
|
|
|
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 -t 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
|
|
masterkey.
|
|
run `hf iclass loclass -f abc.bin`
|
|
|
|
If you don't have access to a iClass SE reader configured in Elite mode there is a test file which you can use.
|
|
`hf iclass loclass -f iclass_dump.bin`
|
|
|
|
|
|
# Unit testing
|
|
In order to verify that loclass is actually working, there is a "unit" test mode.
|
|
run `hf iclass loclass --test`.
|
|
|
|
This test mode uses two files.
|
|
|
|
- `iclass_dump.bin`
|
|
this is a sample file from `hf iclass sim -t 2`, with complete keytable recovery, using 128 carefully selected CSN and the file contains the MAC results from reader.
|
|
- `iclass_key.bin`
|
|
this is file shall contain the legacy masterkey, AA1 key. loclass uses it to verify that permutation / reversing / generation of key is correct. |