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FIX: calcs wiegand correct, adds wiegand parity correct, adds checksum correct, add even parity to blocks correct.

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- when ran it clones nice,  the "lf search" finds a pyramid och checksom is ok.  However,  the wiegand decode is wrong.
Something about where in bitarray to put the startformat bit and wiegand bits...
This commit is contained in:
iceman1001 2016-02-26 21:11:56 +01:00
parent f6af1cf0ad
commit f087591d59
1 changed files with 36 additions and 33 deletions
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63
client/cmdlfpyramid.c
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@ -48,29 +48,35 @@ int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
uint8_t pre[128];
memset(pre, 0x00, sizeof(pre));
// add preamble
pyramidBits[7]=1;
num_to_bytebits(26, 8, pre);
// format start bit
// get wiegand
uint8_t wiegand[24];
// Get 26 wiegand from FacilityCode, CardNumber
uint8_t wiegand[26];
num_to_bytebits(fc, 8, wiegand);
num_to_bytebits(cn, 16, wiegand+8);
// add wiegand parity bits
wiegand_add_parity(pre+8, wiegand, 24);
// add wiegand parity bits (dest, source, len)
wiegand_add_parity(pre+71, wiegand, 26);
// add paritybits
addParity(pre, pyramidBits+8, 66, 4, 1);
// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
addParity(pre+8, pyramidBits+8, 112, 8, 1);
// add checksum
// this is wrong.
uint32_t crc = CRC8Maxim(wiegand, 13);
num_to_bytebits(crc, 8, pre+120);
uint8_t csBuff[13];
for (uint8_t i = 0; i < 13; i++)
csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
uint32_t crc = CRC8Maxim(csBuff, 13);
num_to_bytebits(crc, 8, pyramidBits+120);
return 1;
}
/*
9 - 00001001
33278 - 1000000111111110
10000100110000001
000101010101010101010101082602
*/
int CmdPyramidRead(const char *Cmd) {
// read lf silently
CmdLFRead("s");
@ -85,28 +91,25 @@ int CmdPyramidClone(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
uint32_t facilitycode=0, cardnumber=0;
uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
uint8_t bits[128];
uint8_t *bs = bits;
memset(bs,0,sizeof(bits));
memset(bs, 0x00, sizeof(bits));
//Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
uint32_t blocks[5] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
// if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
// blocks[0] = T5555_MODULATION_FSK2 | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
facilitycode = (fc & 0x000000FF);
cardnumber = (cn & 0x0000FFFF);
// get wiegand from printed number.
GetWiegandFromPyramid(Cmd, &facilitycode, &cardnumber);
if ((facilitycode & 0xFF) != facilitycode) {
facilitycode &= 0xFF;
PrintAndLog("Facility Code Truncated to 8-bits (Pyramid): %u", facilitycode);
}
if ((cardnumber & 0xFFFF) != cardnumber) {
cardnumber &= 0xFFFF;
PrintAndLog("Card Number Truncated to 16-bits (Pyramid): %u", cardnumber);
}
//GetWiegandFromPyramid(Cmd, &facilitycode, &cardnumber);
if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
PrintAndLog("Error with tag bitstream generation.");
@ -122,16 +125,16 @@ int CmdPyramidClone(const char *Cmd) {
PrintAndLog("Blk | Data ");
PrintAndLog("----+------------");
for ( uint8_t i=0; i<5; ++i )
PrintAndLog(" %02d | 0x%08x",i , blocks[i]);
PrintAndLog(" %d | %08x",i , blocks[i]);
UsbCommand resp;
//UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
for ( uint8_t i=0; i<5; ++i ) {
//c.arg[0] = blocks[i];
//c.arg[1] = i;
c.arg[0] = blocks[i];
c.arg[1] = i;
clearCommandBuffer();
// SendCommand(&c);
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
PrintAndLog("Error occurred, device did not respond during write operation.");
return -1;