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magic doc

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Philippe Teuwen 2020-12-12 13:37:21 +01:00
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doc/magic_cards_notes.md
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@ -426,6 +426,12 @@ Note: it seems some cards only accept the "change UID" command.
It accepts direct read of block0 (and only block0) without prior auth. It accepts direct read of block0 (and only block0) without prior auth.
Writing to block 0 has some side-effects:
* It changes also the UID. Changing the UID *does not* change block 0.
* ATQA and SAK bytes are automatically replaced by fixed values.
* On 4-byte UID cards, BCC byte is automatically corrected.
### Characteristics ### Characteristics
* UID: 4b and 7b versions * UID: 4b and 7b versions
@ -452,6 +458,8 @@ Equivalent:
``` ```
# change just UID: # change just UID:
hf 14a raw -s -c -t 2000 90FBCCCC07 11223344556677 hf 14a raw -s -c -t 2000 90FBCCCC07 11223344556677
# read block0:
hf 14a raw -s -c 3000
# write block0: # write block0:
hf 14a raw -s -c -t 2000 90F0CCCC10 041219c3219316984200e32000000000 hf 14a raw -s -c -t 2000 90F0CCCC10 041219c3219316984200e32000000000
# lock (uid/block0?) forever: # lock (uid/block0?) forever: