mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-12-31 04:39:49 +08:00
33 lines
991 B
C
33 lines
991 B
C
#ifndef __TLV_H
|
|
#define __TLV_H
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
|
|
//structure buffer definitions
|
|
#define TAG_LENGTH 2
|
|
#define VALUE_LENGTH 1024
|
|
|
|
//masks
|
|
//if TLV_TAG_NUMBER_MASK bits are set, refer to the next byte for the tag number
|
|
//otherwise its located in bits 1-5
|
|
#define TLV_TAG_NUMBER_MASK 0x1f
|
|
//if TLV_DATA_MASK set then its a 'constructed data object'
|
|
//otherwise a 'primitive data object'
|
|
#define TLV_DATA_MASK 0x20
|
|
#define TLV_TAG_MASK 0x80
|
|
#define TLV_LENGTH_MASK 0x80
|
|
|
|
//tlv tag structure, tag can be max of 2 bytes, length up to 65535 and value 1024 bytes long
|
|
typedef struct {
|
|
uint8_t tag[TAG_LENGTH];
|
|
uint16_t fieldlength;
|
|
uint16_t valuelength;
|
|
uint8_t value[VALUE_LENGTH];
|
|
}tlvtag;
|
|
|
|
//decode a BER TLV
|
|
extern int decode_ber_tlv_item(uint8_t* data, tlvtag* returnedtag);
|
|
extern int encode_ber_tlv_item(uint8_t* tag, uint8_t taglen, uint8_t*data, uint32_t datalen, uint8_t* outputtag, uint32_t* outputtaglen);
|
|
#endif //__TLV_H
|