s1d3sw1ped
b38f7f643b
Parse filanfc-dump/v1 zip/JSON, Bambu 1K images, and merge stickers by tray UID. dump and mifare packages stay importable for a later common library.
37 lines
938 B
Go
37 lines
938 B
Go
// Package mifare holds MIFARE Classic 1K layout helpers with no brand-specific memory map.
|
||
package mifare
|
||
|
||
import "fmt"
|
||
|
||
const (
|
||
Sectors = 16
|
||
Blocks = 64
|
||
BlockSize = 16
|
||
SectorSize = 64
|
||
Size1K = 1024
|
||
)
|
||
|
||
// SectorOf returns the sector index for a block number (0–63).
|
||
func SectorOf(block int) int {
|
||
return block / 4
|
||
}
|
||
|
||
// BlockRange returns the half-open block range [first, last) for a sector.
|
||
func BlockRange(sector int) (first, last int) {
|
||
first = sector * 4
|
||
last = first + 4
|
||
return first, last
|
||
}
|
||
|
||
// SectorBytes returns the 64-byte slice for sector (0–15) from a 1K image.
|
||
func SectorBytes(image []byte, sector int) ([]byte, error) {
|
||
if len(image) != Size1K {
|
||
return nil, fmt.Errorf("image size: want %d got %d", Size1K, len(image))
|
||
}
|
||
if sector < 0 || sector >= Sectors {
|
||
return nil, fmt.Errorf("sector %d out of range", sector)
|
||
}
|
||
off := sector * SectorSize
|
||
return image[off : off+SectorSize], nil
|
||
}
|