Created
February 18, 2020 10:00
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Algorithm for calculating CRC-8 checksum for MIFARE Application Directory (MAD)
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| def checksum(data): | |
| crc = 0xc7 | |
| for byte in data: | |
| crc ^= byte | |
| for _ in range(8): | |
| msb = crc & 0x80 | |
| crc = (crc << 1) & 0xff | |
| if msb: | |
| crc ^= 0x1d | |
| return bytes([crc]) |
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Thank you very much, good sir!