Contact-Less Smart Card Reader & Mifare ONE CARD Secondary Development Documentation
Author: Dennis Lan
Date: 2003/12/17
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The three control sites exist in the access control byte in positive and inverse forms, determine the access rights of the block (such as
The impairment operation must be verified to verify the KEY A, and the value-added operation must be verified to verify the KEY B, and the like). Three controls
The position in the access control byte is taken as an example:
Control of block 0:
Bit 7 6 5 4 3 2 1 0
Byte 6
C20_B
C10_B
Byte 7
C10
C30_B
Byte 8
C30
C20 byte 9
(Note: C10_B means C10 reflies)
Access control (4 bytes, where byte 9 is the standby byte) structure as follows:
Bit 7 6 5 4 3 2 1 0
Byte 6 C23_B C22_B C21_B C20_B
C13_B C12_B C11_B C10_B
Byte 7 C13 C12 C11 C10 C33_B C32_B C31_B C30_B
Byte 8
C33
C32 C31 C30 C23 C22 C21 C20
Byte 9
(Note: _B means to reverse)
6, the access control of the data block (block 0, block 1, block 2) is as follows:
Control bits (x = 0.1.2)
Access condition (for data blocks 0, 1, 2)
C1x
C2x
C3x
Reta
Write
Increment
Decrement, Transfer,
RESTORE
0 0 0 KEYA | B Keya | B Keya | B Keya | B 0 1 0 Keya | B Never Never 1 0 0 Keya | B Keyb Never 1 1 0 Keya | B Keyb Keyb Keya | B 0 0 1 Keya | B Never Never KEYA | B 0 1 1 Keyb Keyb Never Never 1 0 1 Keyb Never Never 1 1 1 Never Never Never (Keya | B means password A or password B, Never means that it is not possible under any conditions)
For example, when the access control bit C10 C20 C20 C30 = 1 0 0 of the block 0, the password A or password B is readable correctly; verify that the password B can be written correctly; the value value, impairment operation cannot be performed. Renewal ... Appendix: Reference information:
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