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PROXRUNNER BLUETOOTH RFID SCANNER - Reference manual
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f. Size = 15 or 23 : master key diversification using RC171 algorithm
Offset
Length
Content
0
1
Key options. See table
g
below.
1
6
Mifare master key.
7
8 or 16
DES or 3-DES diversification key.
g. Key options bits, when size = 15 or 23
Bit
Value
Meaning
7
0
1
Diversified key is an A key
Diversified key is a B key
6
0
1
Diversification with card UID and address fixed to
h
00
Diversification with card UID and address = sector number
5 – 4
01
Diversify the key using RC171 algorithm
3 – 0
RFU
3.3.6. Reading a long string from a Mifare Classic card
Note :
This option is only available on Prox’N’Roll RFID Scanner, RDR-K632 and
ProxRunner.
When bits 4 and 6 in TOF.MIF are set (ASCII output, long string reading
extension enabled), the reader behaves as follow :
•
The output length (bits 0 to 3 of TOF.MIF) is ignored,
•
The reader reads sequentially all Mifare data blocks starting at address
specified in LOC.MIF (absolute address or pointer found in MAD), until
one of those events occurs :
o
The end-of-string character (‘\0’ i.e.
h
00) is read,
o
The end of the card is reached,
o
The authentication failed (see note below),
o
4 blocks (64 bytes) have been read.
Doing so, the reader is able to fetch ASCII strings up to 64 characters.
Note :
in this mode, the reading may cross a sector boundary (64 bytes is 4
blocks, where sectors below 32 are 3-block wide). In this case, the two sectors
to be read must be formatted with the same Mifare key and the same access
mode.
