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make crc8 hitag1 / zx fct

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This commit is contained in:
iceman1001 2021-12-27 17:43:00 +01:00
commit 2837cfa64f
2 changed files with 21 additions and 4 deletions
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21
common/crc.c
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@ -96,16 +96,18 @@ static void print_crc(crc_t *crc) {
uint32_t CRC8Maxim(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x31, 0, 0, true, true);
for (size_t i = 0; i < size; ++i)
for (size_t i = 0; i < size; ++i) {
crc_update2(&crc, buff[i], 8);
}
return crc_finish(&crc);
}
// width=8 poly=0x1d, init=0xc7 (0xe3 - WRONG! but it mentioned in MAD datasheet) refin=false refout=false xorout=0x00 name="CRC-8/MIFARE-MAD"
uint32_t CRC8Mad(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x1d, 0xc7, 0, false, false);
for (size_t i = 0; i < size; ++i)
for (size_t i = 0; i < size; ++i) {
crc_update2(&crc, buff[i], 8);
}
return crc_finish(&crc);
}
// width=4 poly=0xC, reversed poly=0x7 init=0x5 refin=true refout=true xorout=0x0000 check= name="CRC-4/LEGIC"
@ -122,15 +124,26 @@ uint32_t CRC4Legic(uint8_t *buff, size_t size) {
uint32_t CRC8Legic(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x63, 0x55, 0, true, true);
for (size_t i = 0; i < size; ++i)
for (size_t i = 0; i < size; ++i) {
crc_update2(&crc, buff[i], 8);
}
return reflect8(crc_finish(&crc));
}
// width=8 poly=0x7, init=0x2C refin=false refout=false xorout=0x0000 check=0 name="CRC-8/CARDX"
uint32_t CRC8Cardx(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x7, 0x2C, 0, false, false);
for (size_t i = 0; i < size; ++i)
for (size_t i = 0; i < size; ++i) {
crc_update2(&crc, buff[i], 8);
}
return crc_finish(&crc);
}
uint32_t CRC8Hitag1(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x1d, 0xff, 0, false, false);
for (size_t i = 0; i < size; i++) {
crc_update2(&crc, buff[i], 8);
}
return crc_finish(&crc);
}