libnfc supports UUID writable cards and even has some dedicated tools for them.
However it doesn’t work with some of the cards found on eBay that are even simpler to use. Sector 0 is unlocked and can be written without any additional commands. libnfc requires a small patch to get it working.
Following has been tested under ArchLinux with modified libnfc 1.5.1, mfoc 0.10.2 and a SCL3711 dongle.
Patch & recompile libnfc
The patch is fairly simple, open libnfc-1.5.1/utils/nfc-mfclassic.c and comment 2 lines (it was lines 384 and 385 for me):
// Try to write the trailer
if (nfc_initiator_mifare_cmd (pnd, MC_WRITE, uiBlock, &mp) == false) {
printf ("failed to write trailer block %d \n", uiBlock);
bFailure = true;
}
} else {
// The first block 0x00 is read only, skip this
// COMMENT THIS if (uiBlock == 0 && ! write_block_zero)
// COMMENT THIS continue;
Recompile and install.
Connect the SCL3711 dongle
I manually have to remove the pn533 module in order to get libnfc to work. This needs to be done everytime you re-plug the SCL3711 dongle.
# sudo rmmod pn533
Dump the blank Chinese card
Read the fresh blank chinese card
# nfc-list
nfc-list uses libnfc 1.5.1 (r1175)
Connected to NFC device: SCM Micro / SCL3711-NFC&RW - PN533 v2.7 (0x07)
1 ISO14443A passive target(s) found:
ATQA (SENS_RES): 00 04
UID (NFCID1): 00 00 00 00
SAK (SEL_RES): 08
Dump the blank chinese card card to get the keys
# mfoc -P 500 -O blank-chinese.dmp
Now remove the chinese card and put the card you want to copy and dump it
Dump the Mifare card your want to copy
Let’s read the card to clone first
# nfc-list
nfc-list uses libnfc 1.5.1 (r1175)
Connected to NFC device: SCM Micro / SCL3711-NFC&RW - PN533 v2.7 (0x07)
1 ISO14443A passive target(s) found:
ATQA (SENS_RES): 00 04
UID (NFCID1): 9b 97 4f 19
SAK (SEL_RES): 08
Time to dump the target card
# mfoc -P 500 -O cardtocopy.dmp
Put the chinese card back and clone the card
Write the Chinese card with the content of the other card including UUID
# nfc-mfclassic w b cardtocopy.dmp blank-chinese.dmp
or
# nfc-mfclassic w a cardtocopy.dmp blank-chinese.dmp
Check that the card is the same:
# nfc-list
nfc-list uses libnfc 1.5.1 (r1175)
Connected to NFC device: SCM Micro / SCL3711-NFC&RW - PN533 v2.7 (0x07)
1 ISO14443A passive target(s) found:
ATQA (SENS_RES): 00 04
UID (NFCID1): 9b 97 4f 19
SAK (SEL_RES): 08
Go back to blank card
# nfc-mfclassic w b blank-chinese.dmp cardtocopy.dmp
or
# nfc-mfclassic w a blank-chinese.dmp cardtocopy.dmp