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37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
#ifndef __HITAG2_CRYPTO_H
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#define __HITAG2_CRYPTO_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "string.h"
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#include "util.h"
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struct hitag2_tag {
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uint32_t uid;
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enum {
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TAG_STATE_RESET = 0x01, // Just powered up, awaiting GetSnr
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TAG_STATE_ACTIVATING = 0x02, // In activation phase (password mode), sent UID, awaiting reader password
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TAG_STATE_ACTIVATED = 0x03, // Activation complete, awaiting read/write commands
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TAG_STATE_WRITING = 0x04, // In write command, awaiting sector contents to be written
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} state;
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uint16_t active_sector;
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uint8_t crypto_active;
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uint64_t cs;
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uint8_t sectors[12][4];
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};
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extern uint32_t _f20(const uint64_t x);
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extern uint64_t _hitag2_init(const uint64_t key, const uint32_t serial, const uint32_t IV);
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extern uint64_t _hitag2_round(uint64_t *state);
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extern uint32_t _hitag2_byte(uint64_t *x);
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extern void hitag2_cipher_reset(struct hitag2_tag *tag, const uint8_t *iv);
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extern int hitag2_cipher_authenticate(uint64_t *cs, const uint8_t *authenticator_is);
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extern int hitag2_cipher_transcrypt(uint64_t *cs, uint8_t *data, uint16_t bytes, uint16_t bits) ;
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#ifdef __cplusplus
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}
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#endif
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#endif
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