mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-08-21 22:03:42 -07:00
refactoring decoders and verbosity
This commit is contained in:
merlokk
parent
5fd951a799
commit
7feca91687
1 changed files with 107 additions and 61 deletions
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@ -191,6 +191,7 @@ static unsigned char dallas_crc8(const unsigned char * data, const unsigned int
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inbyte >>= 1;
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inbyte >>= 1;
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}
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}
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}
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}
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PrintAndLogEx(WARNING, "--crc %x", crc);
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return crc;
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return crc;
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}
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}
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@ -240,6 +241,68 @@ static uint8_t TexcomTK17CRC(uint8_t* data) {
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return dallas_crc8(ddata, 8);
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return dallas_crc8(ddata, 8);
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}
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}
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static bool TexcomTK13Decode(uint32_t* implengths, uint32_t implengthslen, char* bitstring, char* cbitstring, bool verbose) {
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bitstring[0] = 0;
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cbitstring[0] = 0;
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uint32_t hilength = 0;
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uint32_t lowlength = 0;
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if (!TexkomCalculateBitLengths(implengths, implengthslen, &hilength, &lowlength, NULL, NULL))
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return false;
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uint32_t threshold = (hilength - lowlength) / 3 + 1;
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//PrintAndLogEx(WARNING, "--- hi: %d, low: %d, threshold: %d", hilength, lowlength, threshold);
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bool biterror = false;
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for (uint32_t i = 0; i < implengthslen; i++) {
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if (TexcomCalculateBit(implengths[i], hilength, threshold))
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strcat(bitstring, "1");
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else if (TexcomCalculateBit(implengths[i], lowlength, threshold))
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strcat(bitstring, "0");
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else {
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//PrintAndLogEx(INFO, "ERROR string [%zu]: %s, bit: %d, blen: %d", strlen(bitstring), bitstring, i, implengths[i]);
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biterror = true;
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break;
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}
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}
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if (biterror || strlen(bitstring) == 0)
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return false;
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if (verbose)
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PrintAndLogEx(INFO, "raw bit string [%zu]: %s", strlen(bitstring), bitstring);
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// add trailing impulse (some tags just ignore it)
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if (strlen(bitstring) % 2 != 0) {
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if (bitstring[strlen(bitstring) - 1] == '1')
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strcat(bitstring, "0");
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else
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strcat(bitstring, "1");
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}
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for (uint32_t i = 0; i < strlen(bitstring); i = i + 2) {
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if (bitstring[i] == bitstring[i + 1]) {
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cbitstring[0] = 0;
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if (verbose)
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PrintAndLogEx(WARNING, "Raw bit string have error at offset %d.", i);
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break;
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}
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if (bitstring[i] == '1')
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strcat(cbitstring, "1");
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else
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strcat(cbitstring, "0");
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}
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if (strlen(cbitstring) == 0)
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return false;
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if (verbose)
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PrintAndLogEx(INFO, "bit string [%zu]: %s", strlen(cbitstring), cbitstring);
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return ((strlen(cbitstring) == 64) && (strncmp(cbitstring, "1111111111111111", 16) == 0));
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}
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inline int TexcomTK17Get2Bits(uint32_t len1, uint32_t len2) {
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inline int TexcomTK17Get2Bits(uint32_t len1, uint32_t len2) {
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uint32_t xlen = (len2 * 100) / (len1 + len2);
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uint32_t xlen = (len2 * 100) / (len1 + len2);
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if (xlen < 10 || xlen > 90)
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if (xlen < 10 || xlen > 90)
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@ -296,6 +359,41 @@ static bool TexcomTK17Decode(uint32_t* implengths, uint32_t implengthslen, char*
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return (strlen(bitstring) == 64) && (strncmp(cbitstring, "1111111111111111", 16) == 0);
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return (strlen(bitstring) == 64) && (strncmp(cbitstring, "1111111111111111", 16) == 0);
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}
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}
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static bool TexcomGeneralDecode(uint32_t* implengths, uint32_t implengthslen, char* bitstring, bool verbose) {
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uint32_t hilength = 0;
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uint32_t lowlength = 0;
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if (!TexkomCalculateBitLengths(implengths, implengthslen, &hilength, &lowlength, NULL, NULL))
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return false;
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uint32_t threshold = (hilength - lowlength) / 3 + 1;
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bitstring[0] = 0;
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bool biterror = false;
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for (uint32_t i = 0; i < implengthslen; i++) {
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if (TexcomCalculateBit(implengths[i], hilength, threshold))
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strcat(bitstring, "1");
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else if (TexcomCalculateBit(implengths[i], lowlength, threshold))
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strcat(bitstring, "0");
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else {
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if (verbose) {
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PrintAndLogEx(INFO, "ERROR string [%zu]: %s, bit: %d, blen: %d", strlen(bitstring), bitstring, i, implengths[i]);
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printf("Length array: \r\n");
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for (uint32_t j = 0; j < implengthslen; j++)
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printf("%d,", implengths[j]);
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printf("\r\n");
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}
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biterror = true;
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break;
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}
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}
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if (verbose)
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PrintAndLogEx(INFO, "General raw bit string [%zu]: %s", strlen(bitstring), bitstring);
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return (!biterror && strlen(bitstring) > 0);
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}
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static int CmdHFTexkomReader(const char *Cmd) {
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static int CmdHFTexkomReader(const char *Cmd) {
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CLIParserContext *ctx;
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CLIParserContext *ctx;
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CLIParserInit(&ctx, "hf texkom reader",
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CLIParserInit(&ctx, "hf texkom reader",
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@ -304,11 +402,12 @@ static int CmdHFTexkomReader(const char *Cmd) {
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void *argtable[] = {
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void *argtable[] = {
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arg_param_begin,
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arg_param_begin,
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arg_lit0("v", "verbose", "Verbose scan and output"),
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arg_param_end
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arg_param_end
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};
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};
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CLIExecWithReturn(ctx, Cmd, argtable, true);
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CLIExecWithReturn(ctx, Cmd, argtable, true);
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bool verbose = true;
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bool verbose = arg_get_lit(ctx, 1);
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CLIParserFree(ctx);
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CLIParserFree(ctx);
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@ -332,6 +431,7 @@ static int CmdHFTexkomReader(const char *Cmd) {
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char bitstring[256] = {0};
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char bitstring[256] = {0};
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char cbitstring[128] = {0};
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char cbitstring[128] = {0};
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char genbitstring[256] = {0};
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int codefound = TexkomModError;
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int codefound = TexkomModError;
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uint32_t sindx = 0;
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uint32_t sindx = 0;
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while (sindx < samplesCount - 5) {
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while (sindx < samplesCount - 5) {
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@ -381,71 +481,15 @@ static int CmdHFTexkomReader(const char *Cmd) {
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}
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}
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}
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}
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uint32_t hilength = 0;
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if (impulsecnt == 127 || impulsecnt == 128) {
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uint32_t lowlength = 0;
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if (TexcomTK13Decode(implengths, implengthslen, bitstring, cbitstring, verbose)) {
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if (!TexkomCalculateBitLengths(implengths, implengthslen, &hilength, &lowlength, NULL, NULL))
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codefound = TexkomModTK13;
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continue;
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uint32_t threshold = (hilength - lowlength) / 3 + 1;
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//PrintAndLogEx(WARNING, "--- hi: %d, low: %d, threshold: %d", hilength, lowlength, threshold);
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bitstring[0] = 0;
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bool biterror = false;
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for (uint32_t i = 0; i < implengthslen; i++) {
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if (TexcomCalculateBit(implengths[i], hilength, threshold))
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strcat(bitstring, "1");
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else if (TexcomCalculateBit(implengths[i], lowlength, threshold))
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strcat(bitstring, "0");
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else {
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//PrintAndLogEx(INFO, "ERROR string [%zu]: %s, bit: %d, blen: %d", strlen(bitstring), bitstring, i, implengths[i]);
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//for (uint32_t j = 0; j < implengthslen; j++)
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// printf("%d,", implengths[j]);
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//printf("\r\n");
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biterror = true;
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break;
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break;
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}
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}
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}
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}
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if (biterror || strlen(bitstring) == 0)
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continue;
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if (verbose)
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if (verbose)
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PrintAndLogEx(INFO, "raw bit string [%zu]: %s", strlen(bitstring), bitstring);
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TexcomGeneralDecode(implengths, implengthslen, genbitstring, verbose);
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// add trailing impulse (some tags just ignore it)
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if (strlen(bitstring) % 2 != 0) {
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if (bitstring[strlen(bitstring) - 1] == '1')
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strcat(bitstring, "0");
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else
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strcat(bitstring, "1");
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}
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cbitstring[0] = 0;
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for (uint32_t i = 0; i < strlen(bitstring); i = i + 2) {
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if (bitstring[i] == bitstring[i + 1]) {
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cbitstring[0] = 0;
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if (verbose)
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PrintAndLogEx(WARNING, "Raw bit string have error at offset %d.", i);
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break;
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}
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if (bitstring[i] == '1')
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strcat(cbitstring, "1");
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else
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strcat(cbitstring, "0");
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}
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if (strlen(cbitstring) == 0)
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continue;
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if (verbose)
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PrintAndLogEx(INFO, "bit string [%zu]: %s", strlen(cbitstring), cbitstring);
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if ((strlen(cbitstring) != 64) || (strncmp(cbitstring, "1111111111111111", 16) != 0))
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continue;
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codefound = TexkomModTK13;
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break;
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}
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}
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if (codefound != TexkomModError) {
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if (codefound != TexkomModError) {
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@ -502,6 +546,8 @@ static int CmdHFTexkomReader(const char *Cmd) {
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PrintAndLogEx(ERR, "Code have no preamble FFFF: %s", sprint_hex(tcode, 8));
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PrintAndLogEx(ERR, "Code have no preamble FFFF: %s", sprint_hex(tcode, 8));
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}
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}
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} else {
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} else {
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if (strlen(genbitstring) > 0)
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PrintAndLogEx(INFO, "General decoding bitstring: %s", genbitstring);
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if (strlen(bitstring) > 0)
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if (strlen(bitstring) > 0)
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PrintAndLogEx(INFO, "last raw bit string [%zu]: %s", strlen(bitstring), bitstring);
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PrintAndLogEx(INFO, "last raw bit string [%zu]: %s", strlen(bitstring), bitstring);
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if (strlen(cbitstring) > 0)
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if (strlen(cbitstring) > 0)
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