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calc tk17 raw bitstring

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This commit is contained in:
merlokk 2022-06-28 00:05:18 +03:00
commit 2fdf09606f
1 changed files with 13 additions and 2 deletions
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15
client/src/cmdhftexkom.c
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@ -248,15 +248,16 @@ inline int TexcomTK17Get2Bits(uint32_t len1, uint32_t len2) {
if (xlen < 30)
return 0;
if (xlen < 50)
return 1;
if (xlen < 70)
return 2;
if (xlen < 70)
return 1;
return 3;
}
static bool TexcomTK17Decode(uint32_t* implengths, uint32_t implengthslen, bool verbose) {
char bitstring[256] = {0};
char cbitstring[256] = {0};
for (uint32_t i = 0; i < implengthslen; i = i + 2) {
int dbit = TexcomTK17Get2Bits(implengths[i], implengths[i + 1]);
@ -284,6 +285,16 @@ static bool TexcomTK17Decode(uint32_t* implengths, uint32_t implengthslen, bool
if (verbose)
PrintAndLogEx(INFO, "TK17 raw bit string [%zu]: %s", strlen(bitstring), bitstring);
for (uint32_t i = 0; i < 8; i++) {
memcpy(&cbitstring[i * 8 + 0], &bitstring[i * 8 + 6], 2);
memcpy(&cbitstring[i * 8 + 2], &bitstring[i * 8 + 4], 2);
memcpy(&cbitstring[i * 8 + 4], &bitstring[i * 8 + 2], 2);
memcpy(&cbitstring[i * 8 + 6], &bitstring[i * 8 + 0], 2);
}
if (verbose)
PrintAndLogEx(INFO, "TK17 bit string [%zu]: %s", strlen(cbitstring), cbitstring);
return strlen(bitstring) == 64;
}