PM3 Commands Reference (Iceman Firmware):

Main Help

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Current command:
hf mf rdbl --help

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Read MIFARE Classic block

usage:
    hf mf rdbl [-habv] --blk <dec> [-k <hex>]

options:
    -h, --help                     This help
    --blk <dec>                    block number
    -a                             input key type is key A (def)
    -b                             input key type is key B
    -k, --key <hex>                key, 6 hex bytes
    -v, --verbose                  verbose output

examples/notes:
    hf mf rdbl --blk 0
    hf mf rdbl --blk 0 -k A0A1A2A3A4A5
    hf mf rdbl --blk 3 -v          -> get block 3, decode sector trailer