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Adds lf hid pack and lf hid unpack offline commands. (#614)

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* These are used to pack and unpack the bit length, facility code and card number from "short" HID Prox IDs.
* This also simplifies some repeated code that is used to parse hex digits in lfhid, and adds basic client-side validation to the `lf hid clone` and `lf hid sim` commands, for when an ID that is too long is entered.
* Implements parity checks/calculation for 26-bit H10301 cards.
* Adds links to useful resources for HID Prox cards.
* Adds an explicit warning about the lack of parities on non-26-bit cards.
* Changes all the examples to use 26-bit IDs that have a parity bit set.
This commit is contained in:
Michael Farrell 2018-07-31 03:33:06 +10:00 • committed by pwpiwi
commit ab20cc35b7
2 changed files with 301 additions and 56 deletions
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29
client/cmdlfhid.h
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@ -11,10 +11,39 @@
#ifndef CMDLFHID_H__
#define CMDLFHID_H__
#include <stdint.h>
#include <stdbool.h>
// Structure for unpacked "short" (<38 bits) HID Prox tags.
typedef struct {
// Format length, in bits.
uint8_t fmtLen;
// Facility code.
uint32_t fc;
// Card number.
uint32_t cardnum;
// Parity validity.
//
// When used with pack_short_hid, this determines if we should calculate
// parity values for the ID.
//
// When used with unpack_short_hid, this indicates if we got valid parity
// values for the ID.
bool parityValid;
} short_hid_info;
bool pack_short_hid(/* out */ uint32_t *hi, /* out */ uint32_t *lo, /* in */ const short_hid_info *info);
bool unpack_short_hid(short_hid_info* out, uint32_t hi, uint32_t lo);
int CmdLFHID(const char *Cmd);
int CmdFSKdemodHID(const char *Cmd);
int CmdHIDReadDemod(const char *Cmd);
int CmdHIDSim(const char *Cmd);
int CmdHIDClone(const char *Cmd);
int CmdHIDPack(const char *Cmd);
int CmdHIDUnpack(const char *Cmd);
#endif