476 lines
16 KiB
C
476 lines
16 KiB
C
#include "secplus_v2.h"
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#include <lib/toolbox/manchester_decoder.h>
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#include "../blocks/const.h"
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#include "../blocks/decoder.h"
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#include "../blocks/encoder.h"
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#include "../blocks/generic.h"
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#include "../blocks/math.h"
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/*
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* Help
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* https://github.com/argilo/secplus
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* https://github.com/merbanan/rtl_433/blob/master/src/devices/secplus_v2.c
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*/
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#define TAG "SubGhzProtocoSecPlus_v2"
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#define SECPLUS_V2_HEADER 0x3C0000000000
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#define SECPLUS_V2_HEADER_MASK 0xFFFF3C0000000000
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#define SECPLUS_V2_PACKET_1 0x000000000000
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#define SECPLUS_V2_PACKET_2 0x010000000000
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#define SECPLUS_V2_PACKET_MASK 0x30000000000
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static const SubGhzBlockConst subghz_protocol_secplus_v2_const = {
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.te_short = 250,
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.te_long = 500,
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.te_delta = 110,
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.min_count_bit_for_found = 62,
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};
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struct SubGhzProtocolDecoderSecPlus_v2 {
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SubGhzProtocolDecoderBase base;
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SubGhzBlockDecoder decoder;
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SubGhzBlockGeneric generic;
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ManchesterState manchester_saved_state;
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uint64_t secplus_packet_1;
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};
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struct SubGhzProtocolEncoderSecPlus_v2 {
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SubGhzProtocolEncoderBase base;
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SubGhzProtocolBlockEncoder encoder;
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SubGhzBlockGeneric generic;
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};
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typedef enum {
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SecPlus_v2DecoderStepReset = 0,
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SecPlus_v2DecoderStepDecoderData,
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} SecPlus_v2DecoderStep;
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const SubGhzProtocolDecoder subghz_protocol_secplus_v2_decoder = {
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.alloc = subghz_protocol_decoder_secplus_v2_alloc,
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.free = subghz_protocol_decoder_secplus_v2_free,
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.feed = subghz_protocol_decoder_secplus_v2_feed,
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.reset = subghz_protocol_decoder_secplus_v2_reset,
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.get_hash_data = subghz_protocol_decoder_secplus_v2_get_hash_data,
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.serialize = subghz_protocol_decoder_secplus_v2_serialize,
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.deserialize = subghz_protocol_decoder_secplus_v2_deserialize,
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.get_string = subghz_protocol_decoder_secplus_v2_get_string,
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};
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const SubGhzProtocolEncoder subghz_protocol_secplus_v2_encoder = {
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.alloc = NULL,
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.free = NULL,
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.deserialize = NULL,
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.stop = NULL,
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.yield = NULL,
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};
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const SubGhzProtocol subghz_protocol_secplus_v2 = {
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.name = SUBGHZ_PROTOCOL_SECPLUS_V2_NAME,
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.type = SubGhzProtocolTypeDynamic,
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.flag = SubGhzProtocolFlag_315 | SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
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.decoder = &subghz_protocol_secplus_v2_decoder,
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.encoder = &subghz_protocol_secplus_v2_encoder,
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};
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void* subghz_protocol_decoder_secplus_v2_alloc(SubGhzEnvironment* environment) {
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SubGhzProtocolDecoderSecPlus_v2* instance = malloc(sizeof(SubGhzProtocolDecoderSecPlus_v2));
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instance->base.protocol = &subghz_protocol_secplus_v2;
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instance->generic.protocol_name = instance->base.protocol->name;
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return instance;
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}
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void subghz_protocol_decoder_secplus_v2_free(void* context) {
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furi_assert(context);
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SubGhzProtocolDecoderSecPlus_v2* instance = context;
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free(instance);
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}
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void subghz_protocol_decoder_secplus_v2_reset(void* context) {
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furi_assert(context);
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// SubGhzProtocolDecoderSecPlus_v2* instance = context;
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// does not reset the decoder because you need to get 2 parts of the package
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}
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static bool subghz_protocol_secplus_v2_check_packet(SubGhzProtocolDecoderSecPlus_v2* instance) {
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if((instance->decoder.decode_data & SECPLUS_V2_HEADER_MASK) == SECPLUS_V2_HEADER) {
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if((instance->decoder.decode_data & SECPLUS_V2_PACKET_MASK) == SECPLUS_V2_PACKET_1) {
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instance->secplus_packet_1 = instance->decoder.decode_data;
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} else if(
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((instance->decoder.decode_data & SECPLUS_V2_PACKET_MASK) == SECPLUS_V2_PACKET_2) &&
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(instance->secplus_packet_1)) {
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return true;
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}
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}
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return false;
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}
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void subghz_protocol_decoder_secplus_v2_feed(void* context, bool level, uint32_t duration) {
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furi_assert(context);
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SubGhzProtocolDecoderSecPlus_v2* instance = context;
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ManchesterEvent event = ManchesterEventReset;
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switch(instance->decoder.parser_step) {
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case SecPlus_v2DecoderStepReset:
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if((!level) && (DURATION_DIFF(duration, subghz_protocol_secplus_v2_const.te_long * 130) <
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subghz_protocol_secplus_v2_const.te_delta * 100)) {
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//Found header Security+ 2.0
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instance->decoder.parser_step = SecPlus_v2DecoderStepDecoderData;
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instance->decoder.decode_data = 0;
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instance->decoder.decode_count_bit = 0;
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instance->secplus_packet_1 = 0;
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventReset,
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&instance->manchester_saved_state,
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NULL);
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventLongHigh,
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&instance->manchester_saved_state,
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NULL);
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventShortLow,
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&instance->manchester_saved_state,
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NULL);
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}
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break;
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case SecPlus_v2DecoderStepDecoderData:
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if(!level) {
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if(DURATION_DIFF(duration, subghz_protocol_secplus_v2_const.te_short) <
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subghz_protocol_secplus_v2_const.te_delta) {
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event = ManchesterEventShortLow;
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} else if(
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DURATION_DIFF(duration, subghz_protocol_secplus_v2_const.te_long) <
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subghz_protocol_secplus_v2_const.te_delta) {
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event = ManchesterEventLongLow;
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} else if(
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duration >= (subghz_protocol_secplus_v2_const.te_long * 2 +
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subghz_protocol_secplus_v2_const.te_delta)) {
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if(instance->decoder.decode_count_bit >=
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subghz_protocol_secplus_v2_const.min_count_bit_for_found) {
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instance->generic.data = instance->decoder.decode_data;
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instance->generic.data_count_bit = instance->decoder.decode_count_bit;
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if(subghz_protocol_secplus_v2_check_packet(instance)) {
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if(instance->base.callback)
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instance->base.callback(&instance->base, instance->base.context);
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instance->decoder.parser_step = SecPlus_v2DecoderStepReset;
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}
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}
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instance->decoder.decode_data = 0;
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instance->decoder.decode_count_bit = 0;
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventReset,
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&instance->manchester_saved_state,
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NULL);
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventLongHigh,
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&instance->manchester_saved_state,
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NULL);
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventShortLow,
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&instance->manchester_saved_state,
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NULL);
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} else {
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instance->decoder.parser_step = SecPlus_v2DecoderStepReset;
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}
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} else {
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if(DURATION_DIFF(duration, subghz_protocol_secplus_v2_const.te_short) <
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subghz_protocol_secplus_v2_const.te_delta) {
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event = ManchesterEventShortHigh;
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} else if(
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DURATION_DIFF(duration, subghz_protocol_secplus_v2_const.te_long) <
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subghz_protocol_secplus_v2_const.te_delta) {
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event = ManchesterEventLongHigh;
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} else {
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instance->decoder.parser_step = SecPlus_v2DecoderStepReset;
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}
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}
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if(event != ManchesterEventReset) {
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bool data;
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bool data_ok = manchester_advance(
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instance->manchester_saved_state, event, &instance->manchester_saved_state, &data);
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if(data_ok) {
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instance->decoder.decode_data = (instance->decoder.decode_data << 1) | data;
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instance->decoder.decode_count_bit++;
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}
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}
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break;
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}
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}
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/**
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* Security+ 2.0 half-message decoding
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* @param data data
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* @param roll_array[] return roll_array part
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* @param fixed[] return fixed part
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* @return true On success
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*/
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static bool
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subghz_protocol_secplus_v2_decode_half(uint64_t data, uint8_t roll_array[], uint32_t* fixed) {
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uint8_t order = (data >> 34) & 0x0f;
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uint8_t invert = (data >> 30) & 0x0f;
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uint16_t p[3] = {0};
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for(int i = 29; i >= 0; i -= 3) {
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p[0] = p[0] << 1 | bit_read(data, i);
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p[1] = p[1] << 1 | bit_read(data, i - 1);
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p[2] = p[2] << 1 | bit_read(data, i - 2);
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}
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// selectively invert buffers
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switch(invert) {
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case 0x00: // 0b0000 (True, True, False),
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p[0] = ~p[0] & 0x03FF;
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p[1] = ~p[1] & 0x03FF;
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break;
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case 0x01: // 0b0001 (False, True, False),
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p[1] = ~p[1] & 0x03FF;
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break;
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case 0x02: // 0b0010 (False, False, True),
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p[2] = ~p[2] & 0x03FF;
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break;
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case 0x04: // 0b0100 (True, True, True),
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p[0] = ~p[0] & 0x03FF;
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p[1] = ~p[1] & 0x03FF;
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p[2] = ~p[2] & 0x03FF;
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break;
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case 0x05: // 0b0101 (True, False, True),
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case 0x0a: // 0b1010 (True, False, True),
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p[0] = ~p[0] & 0x03FF;
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p[2] = ~p[2] & 0x03FF;
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break;
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case 0x06: // 0b0110 (False, True, True),
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p[1] = ~p[1] & 0x03FF;
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p[2] = ~p[2] & 0x03FF;
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break;
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case 0x08: // 0b1000 (True, False, False),
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p[0] = ~p[0] & 0x03FF;
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break;
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case 0x09: // 0b1001 (False, False, False),
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break;
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default:
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FURI_LOG_E(TAG, "Invert FAIL");
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return false;
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}
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uint16_t a = p[0], b = p[1], c = p[2];
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// selectively reorder buffers
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switch(order) {
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case 0x06: // 0b0110 2, 1, 0],
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case 0x09: // 0b1001 2, 1, 0],
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p[2] = a;
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p[1] = b;
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p[0] = c;
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break;
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case 0x08: // 0b1000 1, 2, 0],
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case 0x04: // 0b0100 1, 2, 0],
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p[1] = a;
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p[2] = b;
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p[0] = c;
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break;
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case 0x01: // 0b0001 2, 0, 1],
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p[2] = a;
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p[0] = b;
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p[1] = c;
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break;
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case 0x00: // 0b0000 0, 2, 1],
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p[0] = a;
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p[2] = b;
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p[1] = c;
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break;
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case 0x05: // 0b0101 1, 0, 2],
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p[1] = a;
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p[0] = b;
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p[2] = c;
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break;
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case 0x02: // 0b0010 0, 1, 2],
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case 0x0A: // 0b1010 0, 1, 2],
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p[0] = a;
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p[1] = b;
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p[2] = c;
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break;
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default:
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FURI_LOG_E(TAG, "Order FAIL");
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return false;
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}
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data = order << 4 | invert;
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int k = 0;
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for(int i = 6; i >= 0; i -= 2) {
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roll_array[k++] = (data >> i) & 0x03;
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if(roll_array[k] == 3) {
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FURI_LOG_E(TAG, "Roll_Array FAIL");
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return false;
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}
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}
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for(int i = 8; i >= 0; i -= 2) {
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roll_array[k++] = (p[2] >> i) & 0x03;
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if(roll_array[k] == 3) {
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FURI_LOG_E(TAG, "Roll_Array FAIL");
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return false;
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}
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}
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fixed[0] = p[0] << 10 | p[1];
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return true;
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}
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/**
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* Analysis of received data
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* @param instance Pointer to a SubGhzBlockGeneric* instance
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* @param packet_1 first part of the message
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*/
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static void
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subghz_protocol_secplus_v2_remote_controller(SubGhzBlockGeneric* instance, uint64_t packet_1) {
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uint32_t fixed_1[1];
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uint8_t roll_1[9] = {0};
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uint32_t fixed_2[1];
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uint8_t roll_2[9] = {0};
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uint8_t rolling_digits[18] = {0};
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if(subghz_protocol_secplus_v2_decode_half(packet_1, roll_1, fixed_1) &&
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subghz_protocol_secplus_v2_decode_half(instance->data, roll_2, fixed_2)) {
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rolling_digits[0] = roll_2[8];
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rolling_digits[1] = roll_1[8];
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rolling_digits[2] = roll_2[4];
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rolling_digits[3] = roll_2[5];
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rolling_digits[4] = roll_2[6];
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rolling_digits[5] = roll_2[7];
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rolling_digits[6] = roll_1[4];
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rolling_digits[7] = roll_1[5];
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rolling_digits[8] = roll_1[6];
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rolling_digits[9] = roll_1[7];
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rolling_digits[10] = roll_2[0];
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rolling_digits[11] = roll_2[1];
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rolling_digits[12] = roll_2[2];
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rolling_digits[13] = roll_2[3];
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rolling_digits[14] = roll_1[0];
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rolling_digits[15] = roll_1[1];
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rolling_digits[16] = roll_1[2];
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rolling_digits[17] = roll_1[3];
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uint32_t rolling = 0;
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for(int i = 0; i < 18; i++) {
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rolling = (rolling * 3) + rolling_digits[i];
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}
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// Max value = 2^28 (268435456)
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if(rolling >= 0x10000000) {
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FURI_LOG_E(TAG, "Rolling FAIL");
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instance->cnt = 0;
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instance->btn = 0;
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instance->serial = 0;
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} else {
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instance->cnt = subghz_protocol_blocks_reverse_key(rolling, 28);
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instance->btn = fixed_1[0] >> 12;
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instance->serial = fixed_1[0] << 20 | fixed_2[0];
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}
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} else {
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instance->cnt = 0;
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instance->btn = 0;
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instance->serial = 0;
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}
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}
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uint8_t subghz_protocol_decoder_secplus_v2_get_hash_data(void* context) {
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furi_assert(context);
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SubGhzProtocolDecoderSecPlus_v2* instance = context;
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return subghz_protocol_blocks_get_hash_data(
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&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
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}
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bool subghz_protocol_decoder_secplus_v2_serialize(
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void* context,
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FlipperFormat* flipper_format,
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uint32_t frequency,
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FuriHalSubGhzPreset preset) {
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furi_assert(context);
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SubGhzProtocolDecoderSecPlus_v2* instance = context;
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bool res =
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subghz_block_generic_serialize(&instance->generic, flipper_format, frequency, preset);
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uint8_t key_data[sizeof(uint64_t)] = {0};
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for(size_t i = 0; i < sizeof(uint64_t); i++) {
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key_data[sizeof(uint64_t) - i - 1] = (instance->secplus_packet_1 >> i * 8) & 0xFF;
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}
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if(res &&
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!flipper_format_write_hex(flipper_format, "Secplus_packet_1", key_data, sizeof(uint64_t))) {
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FURI_LOG_E(TAG, "Unable to add Secplus_packet_1");
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res = false;
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}
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return res;
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}
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bool subghz_protocol_decoder_secplus_v2_deserialize(void* context, FlipperFormat* flipper_format) {
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furi_assert(context);
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SubGhzProtocolDecoderSecPlus_v2* instance = context;
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bool res = false;
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do {
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if(!subghz_block_generic_deserialize(&instance->generic, flipper_format)) {
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FURI_LOG_E(TAG, "Deserialize error");
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break;
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}
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if(!flipper_format_rewind(flipper_format)) {
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FURI_LOG_E(TAG, "Rewind error");
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break;
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}
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uint8_t key_data[sizeof(uint64_t)] = {0};
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if(!flipper_format_read_hex(
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flipper_format, "Secplus_packet_1", key_data, sizeof(uint64_t))) {
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FURI_LOG_E(TAG, "Missing Secplus_packet_1");
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break;
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}
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for(uint8_t i = 0; i < sizeof(uint64_t); i++) {
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instance->secplus_packet_1 = instance->secplus_packet_1 << 8 | key_data[i];
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}
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res = true;
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} while(false);
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return res;
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}
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void subghz_protocol_decoder_secplus_v2_get_string(void* context, string_t output) {
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furi_assert(context);
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SubGhzProtocolDecoderSecPlus_v2* instance = context;
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subghz_protocol_secplus_v2_remote_controller(&instance->generic, instance->secplus_packet_1);
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string_cat_printf(
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output,
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"%s %db\r\n"
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"Pk1:0x%lX%08lX\r\n"
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"Pk2:0x%lX%08lX\r\n"
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"Sn:0x%08lX Btn:0x%01X\r\n"
|
|
"Cnt:0x%03X\r\n",
|
|
|
|
instance->generic.protocol_name,
|
|
instance->generic.data_count_bit,
|
|
(uint32_t)(instance->secplus_packet_1 >> 32),
|
|
(uint32_t)instance->secplus_packet_1,
|
|
(uint32_t)(instance->generic.data >> 32),
|
|
(uint32_t)instance->generic.data,
|
|
instance->generic.serial,
|
|
instance->generic.btn,
|
|
instance->generic.cnt);
|
|
}
|