armsrc/hitag2_crypto.h

   1 #ifndef __HITAG2_CRYPTO_H
   2 #define __HITAG2_CRYPTO_H
   3
   4 #include "common.h"
   5
   6 struct hitag2_tag {
   7     uint32_t uid;
   8     enum {
   9         TAG_STATE_RESET      = 0x01,       // Just powered up, awaiting GetSnr
  10         TAG_STATE_ACTIVATING = 0x02,       // In activation phase (password mode), sent UID, awaiting reader password
  11         TAG_STATE_ACTIVATED  = 0x03,       // Activation complete, awaiting read/write commands
  12         TAG_STATE_WRITING    = 0x04,       // In write command, awaiting sector contents to be written
  13     } state;
  14     uint16_t active_sector;
  15     uint8_t crypto_active;
  16     uint64_t cs;
  17     uint8_t sectors[12][4];
  18 };
  19
  20 uint32_t _f20(const uint64_t x);
  21 uint64_t _hitag2_init(const uint64_t key, const uint32_t serial, const uint32_t IV);
  22 uint64_t _hitag2_round(uint64_t *state);
  23 uint32_t _hitag2_byte(uint64_t *x);
  24 void hitag2_cipher_reset(struct hitag2_tag *tag, const uint8_t *iv);
  25 int hitag2_cipher_authenticate(uint64_t *cs, const uint8_t *authenticator_is);
  26 int hitag2_cipher_transcrypt(uint64_t *cs, uint8_t *data, uint16_t bytes, uint16_t bits) ;
  27
  28 #endif