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Add 36bit HID format, extend calcWiegand() to include oem bits

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David Beauchamp
2019-04-10 20:34:42 -04:00
parent 919cfb5841
commit 8d479e3a68
4 changed files with 38 additions and 6 deletions
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9
client/util.c
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@@ -751,6 +751,15 @@ void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length) {
*(target) = GetParity(source + length / 2, ODD, length / 2);
}
// add HID parity to binary array: ODD prefix for 1st half of ID, EVEN suffix for 2nd half
void wiegand_add_parity_swapped(uint8_t *target, uint8_t *source, uint8_t length)
{
*(target++)= GetParity(source, ODD, length / 2);
memcpy(target, source, length);
target += length;
*(target)= GetParity(source + length / 2, EVEN, length / 2);
}
// xor two arrays together for len items. The dst array contains the new xored values.
void xor(unsigned char *dst, unsigned char *src, size_t len) {
for (; len > 0; len--, dst++, src++)