github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-14 18:48:13 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

chg: adjusted the input parameters for crc16 implementations.

Browse source
This commit is contained in:
iceman1001 2018-01-28 12:19:04 +01:00
commit 205e4b2300
8 changed files with 206 additions and 61 deletions
Download patch file Download diff file Expand all files Collapse all files

20
common/crc.c
View file

@ -70,7 +70,8 @@ void crc_update(crc_t *crc, uint32_t data, int data_width)
uint32_t crc_finish(crc_t *crc) {
uint32_t val = crc->state;
if (crc->refout) val = reflect(val, crc->order);
if (crc->refout)
val = reflect(val, crc->order);
return ( val ^ crc->final_xor ) & crc->mask;
}
@ -159,20 +160,3 @@ uint32_t CRC16_CCITT(uint8_t *buff, size_t size) {
crc_update(&crc, buff[i], 8);
return crc_finish(&crc);
}
//width=16 poly=0x8408 init=0xffff refin=false refout=true xorout=0xffff check=0xF0B8 name="CRC-16/ISO/IEC 13239"
uint32_t CRC16_Iso15693(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 16, 0x8408, 0xFFFF, 0xFFFF, true, false);
for ( int i=0; i < size; ++i)
crc_update(&crc, buff[i], 8);
return reflect16(crc_finish(&crc));
}
//width=16 poly=0x8408 init=0xffff refin=true refout=true xorout=0x0BC3 check=0xF0B8 name="CRC-16/ICLASS"
uint32_t CRC16_ICLASS(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 16, 0x8408, 0xFFFF, 0x0BC3, false, false);
for ( int i=0; i < size; ++i)
crc_update(&crc, buff[i], 8);
return crc_finish(&crc);
}