mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-10 06:54:19 +00:00
301 lines
10 KiB
C
301 lines
10 KiB
C
#include <furi.h>
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#include <toolbox/protocols/protocol.h>
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#include <lfrfid/tools/fsk_demod.h>
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#include <lfrfid/tools/fsk_osc.h>
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#include <bit_lib/bit_lib.h>
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#include "lfrfid_protocols.h"
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#define JITTER_TIME (20)
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#define MIN_TIME (64 - JITTER_TIME)
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#define MAX_TIME (80 + JITTER_TIME)
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#define IOPROXXSF_DECODED_DATA_SIZE (4)
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#define IOPROXXSF_ENCODED_DATA_SIZE (8)
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#define IOPROXXSF_BIT_SIZE (8)
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#define IOPROXXSF_BIT_MAX_SIZE (IOPROXXSF_BIT_SIZE * IOPROXXSF_ENCODED_DATA_SIZE)
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typedef struct {
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FSKDemod* fsk_demod;
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} ProtocolIOProxXSFDecoder;
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typedef struct {
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FSKOsc* fsk_osc;
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uint8_t encoded_index;
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} ProtocolIOProxXSFEncoder;
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typedef struct {
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ProtocolIOProxXSFEncoder encoder;
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ProtocolIOProxXSFDecoder decoder;
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uint8_t encoded_data[IOPROXXSF_ENCODED_DATA_SIZE];
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uint8_t data[IOPROXXSF_DECODED_DATA_SIZE];
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} ProtocolIOProxXSF;
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ProtocolIOProxXSF* protocol_io_prox_xsf_alloc(void) {
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ProtocolIOProxXSF* protocol = malloc(sizeof(ProtocolIOProxXSF));
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protocol->decoder.fsk_demod = fsk_demod_alloc(MIN_TIME, 8, MAX_TIME, 6);
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protocol->encoder.fsk_osc = fsk_osc_alloc(8, 10, 64);
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return protocol;
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}
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void protocol_io_prox_xsf_free(ProtocolIOProxXSF* protocol) {
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fsk_demod_free(protocol->decoder.fsk_demod);
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fsk_osc_free(protocol->encoder.fsk_osc);
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free(protocol);
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}
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uint8_t* protocol_io_prox_xsf_get_data(ProtocolIOProxXSF* protocol) {
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return protocol->data;
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}
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void protocol_io_prox_xsf_decoder_start(ProtocolIOProxXSF* protocol) {
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memset(protocol->encoded_data, 0, IOPROXXSF_ENCODED_DATA_SIZE);
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}
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static uint8_t protocol_io_prox_xsf_compute_checksum(const uint8_t* data) {
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// Packet structure:
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//
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//0 1 2 3 4 5 6 7
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//v v v v v v v v
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//01234567 8 9ABCDEF0 1 23456789 A BCDEF012 3 456789AB C DEF01234 5 6789ABCD EF
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//00000000 0 VVVVVVVV 1 WWWWWWWW 1 XXXXXXXX 1 YYYYYYYY 1 ZZZZZZZZ 1 CHECKSUM 11
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//
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// algorithm as observed by the proxmark3 folks
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// CHECKSUM == 0xFF - (V + W + X + Y + Z)
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uint8_t checksum = 0;
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for(size_t i = 1; i <= 5; i++) {
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checksum += bit_lib_get_bits(data, 9 * i, 8);
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}
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return 0xFF - checksum;
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}
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static bool protocol_io_prox_xsf_can_be_decoded(const uint8_t* encoded_data) {
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// Packet framing
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//
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//0 1 2 3 4 5 6 7
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//v v v v v v v v
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//01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF
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//-----------------------------------------------------------------------
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//00000000 01______ _1______ __1_____ ___1____ ____1___ _____1XX XXXXXX11
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//
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// _ = variable data
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// 0 = preamble 0
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// 1 = framing 1
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// X = checksum
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// Validate the packet preamble is there...
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if(encoded_data[0] != 0b00000000) {
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return false;
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}
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if((encoded_data[1] >> 6) != 0b01) {
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return false;
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}
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// ... check for known ones...
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if(bit_lib_bit_is_not_set(encoded_data[2], 6)) {
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return false;
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}
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if(bit_lib_bit_is_not_set(encoded_data[3], 5)) {
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return false;
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}
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if(bit_lib_bit_is_not_set(encoded_data[4], 4)) {
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return false;
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}
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if(bit_lib_bit_is_not_set(encoded_data[5], 3)) {
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return false;
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}
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if(bit_lib_bit_is_not_set(encoded_data[6], 2)) {
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return false;
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}
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if(bit_lib_bit_is_not_set(encoded_data[7], 1)) {
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return false;
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}
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if(bit_lib_bit_is_not_set(encoded_data[7], 0)) {
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return false;
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}
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// ... and validate our checksums.
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uint8_t checksum = protocol_io_prox_xsf_compute_checksum(encoded_data);
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uint8_t checkval = bit_lib_get_bits(encoded_data, 54, 8);
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if(checksum != checkval) {
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return false;
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}
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return true;
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}
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void protocol_io_prox_xsf_decode(const uint8_t* encoded_data, uint8_t* decoded_data) {
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// Packet structure:
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// (Note: the second word seems fixed; but this may not be a guarantee;
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// it currently has no meaning.)
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//
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//0 1 2 3 4 5 6 7
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//v v v v v v v v
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//01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF
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//-----------------------------------------------------------------------
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//00000000 01111000 01FFFFFF FF1VVVVV VVV1CCCC CCCC1CCC CCCCC1XX XXXXXX11
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//
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// F = facility code
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// V = version
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// C = code
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// X = checksum
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// Facility code
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decoded_data[0] = bit_lib_get_bits(encoded_data, 18, 8);
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// Version code.
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decoded_data[1] = bit_lib_get_bits(encoded_data, 27, 8);
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// Code bytes.
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decoded_data[2] = bit_lib_get_bits(encoded_data, 36, 8);
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decoded_data[3] = bit_lib_get_bits(encoded_data, 45, 8);
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}
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bool protocol_io_prox_xsf_decoder_feed(ProtocolIOProxXSF* protocol, bool level, uint32_t duration) {
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bool result = false;
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uint32_t count;
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bool value;
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fsk_demod_feed(protocol->decoder.fsk_demod, level, duration, &value, &count);
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for(size_t i = 0; i < count; i++) {
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bit_lib_push_bit(protocol->encoded_data, IOPROXXSF_ENCODED_DATA_SIZE, value);
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if(protocol_io_prox_xsf_can_be_decoded(protocol->encoded_data)) {
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protocol_io_prox_xsf_decode(protocol->encoded_data, protocol->data);
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result = true;
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break;
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}
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}
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return result;
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}
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static void protocol_io_prox_xsf_encode(const uint8_t* decoded_data, uint8_t* encoded_data) {
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// Packet to transmit:
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//
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// 0 10 20 30 40 50 60
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// v v v v v v v
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// 01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
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// -----------------------------------------------------------------------------
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// 00000000 0 11110000 1 facility 1 version_ 1 code-one 1 code-two 1 checksum 11
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// Preamble.
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bit_lib_set_bits(encoded_data, 0, 0b00000000, 8);
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bit_lib_set_bit(encoded_data, 8, 0);
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bit_lib_set_bits(encoded_data, 9, 0b11110000, 8);
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bit_lib_set_bit(encoded_data, 17, 1);
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// Facility code.
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bit_lib_set_bits(encoded_data, 18, decoded_data[0], 8);
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bit_lib_set_bit(encoded_data, 26, 1);
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// Version
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bit_lib_set_bits(encoded_data, 27, decoded_data[1], 8);
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bit_lib_set_bit(encoded_data, 35, 1);
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// Code one
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bit_lib_set_bits(encoded_data, 36, decoded_data[2], 8);
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bit_lib_set_bit(encoded_data, 44, 1);
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// Code two
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bit_lib_set_bits(encoded_data, 45, decoded_data[3], 8);
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bit_lib_set_bit(encoded_data, 53, 1);
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// Checksum
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bit_lib_set_bits(encoded_data, 54, protocol_io_prox_xsf_compute_checksum(encoded_data), 8);
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bit_lib_set_bit(encoded_data, 62, 1);
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bit_lib_set_bit(encoded_data, 63, 1);
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}
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bool protocol_io_prox_xsf_encoder_start(ProtocolIOProxXSF* protocol) {
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protocol_io_prox_xsf_encode(protocol->data, protocol->encoded_data);
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protocol->encoder.encoded_index = 0;
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fsk_osc_reset(protocol->encoder.fsk_osc);
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return true;
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}
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LevelDuration protocol_io_prox_xsf_encoder_yield(ProtocolIOProxXSF* protocol) {
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bool level;
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uint32_t duration;
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bool bit = bit_lib_get_bit(protocol->encoded_data, protocol->encoder.encoded_index);
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bool advance = fsk_osc_next_half(protocol->encoder.fsk_osc, bit, &level, &duration);
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if(advance) {
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bit_lib_increment_index(protocol->encoder.encoded_index, IOPROXXSF_BIT_MAX_SIZE);
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}
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return level_duration_make(level, duration);
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}
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void protocol_io_prox_xsf_render_data(ProtocolIOProxXSF* protocol, FuriString* result) {
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uint8_t* data = protocol->data;
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furi_string_printf(
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result,
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"FC: %hhu\n"
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"V: %hhu\n"
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"Card: %hu",
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data[0],
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data[1],
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(uint16_t)((data[2] << 8) | (data[3])));
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}
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void protocol_io_prox_xsf_render_brief_data(ProtocolIOProxXSF* protocol, FuriString* result) {
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uint8_t* data = protocol->data;
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furi_string_printf(
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result,
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"FC: %hhu, V: %hhu\n"
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"Card: %hu",
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data[0],
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data[1],
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(uint16_t)((data[2] << 8) | (data[3])));
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}
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bool protocol_io_prox_xsf_write_data(ProtocolIOProxXSF* protocol, void* data) {
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LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
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bool result = false;
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// Correct protocol data by redecoding
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protocol_io_prox_xsf_encode(protocol->data, protocol->encoded_data);
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protocol_io_prox_xsf_decode(protocol->encoded_data, protocol->data);
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protocol_io_prox_xsf_encode(protocol->data, protocol->encoded_data);
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if(request->write_type == LFRFIDWriteTypeT5577) {
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request->t5577.block[0] = LFRFID_T5577_MODULATION_FSK2a | LFRFID_T5577_BITRATE_RF_64 |
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(2 << LFRFID_T5577_MAXBLOCK_SHIFT);
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request->t5577.block[1] = bit_lib_get_bits_32(protocol->encoded_data, 0, 32);
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request->t5577.block[2] = bit_lib_get_bits_32(protocol->encoded_data, 32, 32);
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request->t5577.blocks_to_write = 3;
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result = true;
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}
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return result;
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}
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const ProtocolBase protocol_io_prox_xsf = {
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.name = "IoProxXSF",
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.manufacturer = "Kantech",
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.data_size = IOPROXXSF_DECODED_DATA_SIZE,
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.features = LFRFIDFeatureASK,
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.validate_count = 3,
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.alloc = (ProtocolAlloc)protocol_io_prox_xsf_alloc,
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.free = (ProtocolFree)protocol_io_prox_xsf_free,
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.get_data = (ProtocolGetData)protocol_io_prox_xsf_get_data,
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.decoder =
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{
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.start = (ProtocolDecoderStart)protocol_io_prox_xsf_decoder_start,
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.feed = (ProtocolDecoderFeed)protocol_io_prox_xsf_decoder_feed,
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},
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.encoder =
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{
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.start = (ProtocolEncoderStart)protocol_io_prox_xsf_encoder_start,
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.yield = (ProtocolEncoderYield)protocol_io_prox_xsf_encoder_yield,
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},
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.render_data = (ProtocolRenderData)protocol_io_prox_xsf_render_data,
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.render_brief_data = (ProtocolRenderData)protocol_io_prox_xsf_render_brief_data,
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.write_data = (ProtocolWriteData)protocol_io_prox_xsf_write_data,
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};
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