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CHG: 'lf hid wiegand' - remaking the wiegand calcs

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This commit is contained in:
iceman1001 2017-01-11 23:02:07 +01:00
commit fbc2bace4a
1 changed files with 26 additions and 41 deletions
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67
client/cmdlfhid.c
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@ -175,13 +175,19 @@ typedef struct {
size_t Wiegand_n;
} wiegand_t;
static void addHIDMarker(uint8_t fmtlen, uint8_t *out) {
static void addHIDMarker(uint8_t fmtlen, uint8_t *out) {
switch(fmtlen) {
case 26:
//*out |= (1 << 26); // why this?
//*out |= (1 << 37); // bit format for hid?
case 26:{
uint8_t len = 37;
uint8_t tmp[len];
memset(tmp, 0, len);
uint8_t idx = 37-fmtlen;
memcpy(tmp+idx, out, fmtlen);
tmp[idx] = 1; // start sentinel?
tmp[0] = 1; // bit indicates that a format smaller than 37 is used
memcpy(out, tmp, len);
break;
}
case 34:
// set bit format for less than 37 bit format
// 5+32= 1
@ -228,14 +234,14 @@ static void addHIDMarker(uint8_t fmtlen, uint8_t *out) {
// *lo |= result;
// }
//static void calc26(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
//static void calc26(uint16_t fc, uint32_t cardno, uint8_t *out){
static void calc26(uint16_t fc, uint32_t cardno, uint8_t *out){
uint8_t wiegand[24];
num_to_bytebits(fc, 8, wiegand);
num_to_bytebits(cardno, 16, wiegand+8);
wiegand_add_parity(out, wiegand, sizeof(wiegand) );
}
// static void calc33(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
// static void calc33(uint16_t fc, uint32_t cardno, uint8_t *out){
// }
static void calc34(uint16_t fc, uint32_t cardno, uint8_t *out){
uint8_t wiegand[32];
@ -243,7 +249,7 @@ static void calc34(uint16_t fc, uint32_t cardno, uint8_t *out){
num_to_bytebits(cardno, 16, wiegand + 16);
wiegand_add_parity(out, wiegand, sizeof(wiegand) );
}
// static void calc35(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
// static void calc35(uint16_t fc, uint32_t cardno, uint8_t *out){
// *lo = ((cardno & 0xFFFFF) << 1) | fc << 21;
// *hi = (1 << 5) | ((fc >> 11) & 1);
// }
@ -269,47 +275,22 @@ static void calc37H(uint64_t cardno, uint8_t *out){
printf("%x %x\n", (uint32_t)(cardno >> 32), (uint32_t)cardno );
}
// static void calc40(uint64_t cardno, uint32_t *hi, uint32_t *lo){
// static void calc40(uint64_t cardno, uint8_t *out){
// cardno = (cardno & 0xFFFFFFFFFF);
// *lo = ((cardno & 0xFFFFFFFF) << 1 );
// *hi = (cardno >> 31);
// }
void calcWiegand(uint8_t fmtlen, uint16_t fc, uint64_t cardno, uint8_t *bits){
// uint32_t hi = 0, lo = 0;
uint32_t cn32 = (cardno & 0xFFFFFFFF);
switch ( fmtlen ) {
case 26 : {
calc26(fc, cn32, bits);
//addHIDFormatMarker(fmtlen, bits);
break;
}
// case 33 : {
// // calc33(fc, cn32, hi, lo);
// // getParity33(hi, lo);
// break;
// }
case 34 : {
calc34(fc, cn32, bits);
//addHIDFormatMarker(fmtlen, bits);
break;
}
// case 35 : {
// calc35(fc, cn32, hi, lo);
// getParity35(hi, lo);
// break;
// }
case 37 : {
calc37S(fc, cn32, bits);
//addHIDFormatMarker(fmtlen, bits);
break;
}
case 38 : {
calc37H(cardno, bits);
break;
}
// case 40 : calc40(cardno, hi, lo); break;
case 26: calc26(fc, cn32, bits); break;
// case 33 : calc33(fc, cn32, bits); break;
case 34: calc34(fc, cn32, bits); break;
// case 35 : calc35(fc, cn32, bits); break;
case 37: calc37S(fc, cn32, bits); break;
case 38: calc37H(cardno, bits); break;
// case 40 : calc40(cardno, bits); break;
// case 44 : { break; }
// case 84 : { break; }
default: break;
@ -339,7 +320,11 @@ int CmdHIDWiegand(const char *Cmd) {
for (uint8_t i = 0; i < sizeof(fmtlen); i++){
memset(bits, 0x00, sizeof(bits));
calcWiegand( fmtlen[i], fc, cardnum, bs);
printf("ice:: %s", sprint_bin(bs, fmtlen[i]));
wiegand = (uint64_t)bytebits_to_byte(bs, 32) << 32 | bytebits_to_byte(bs+32, 32);
addHIDMarker(fmtlen[i], bs);
printf("ice:: %s", sprint_bin(bs, 37));
blocks = (uint64_t)bytebits_to_byte(bs, 32) << 32 | bytebits_to_byte(bs+32, 32);
uint8_t shifts = 64-fmtlen[i];
wiegand >>= shifts;