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add: 'wiegand commands' - wiegand manipulation like encoding / decoding of credentials. From offical repo (@grauerfuchs)

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Adapted and converted to fit this repo.
This commit is contained in:
iceman1001 2019-09-18 19:20:07 +02:00
commit 7abc10c63a
9 changed files with 1243 additions and 1 deletions
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17
client/util.c
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@ -878,3 +878,20 @@ char *strmcopy(const char *buf) {
}
return str;
}
/**
* Converts a hex string to component "hi2", "hi" and "lo" 32-bit integers, one nibble
* at a time.
*
* Returns the number of nibbles (4 bits) entered.
*/
int hexstring_to_u96(uint32_t* hi2, uint32_t* hi, uint32_t* lo, const char* str) {
int n = 0, i = 0;
while (sscanf(&str[i++], "%1x", &n ) == 1) {
*hi2 = (*hi2 << 4) | (*hi >> 28);
*hi = (*hi << 4) | (*lo >> 28);
*lo = (*lo << 4) | (n & 0xf);
}
return i - 1;
}