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philips pwd/pack gen algo

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iceman1001 2023-06-11 20:04:26 +02:00
commit dfc338c384
1 changed files with 28 additions and 1 deletions
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29
common/generator.c
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@ -195,6 +195,20 @@ uint32_t ul_ev1_pwdgenF(const uint8_t *uid) {
return pwd;
}
// Solution from @atc1441
// https://gist.github.com/atc1441/41af75048e4c22af1f5f0d4c1d94bb56
// Philips Sonicare toothbrush NFC head
uint32_t ul_ev1_pwdgenG(const uint8_t *uid, const uint8_t *mfg) {
init_table(CRC_PHILIPS);
// UID
uint32_t crc1 = crc16_philips(uid, 7);
// MFG string
uint32_t crc2 = crc16_fast(mfg, 10, crc1, false, false);
return (BSWAP_16(crc2) << 16 | BSWAP_16(crc1));
}
// pack generation for algo 1-3
uint16_t ul_ev1_packgenA(const uint8_t *uid) {
uint16_t pack = (uid[0] ^ uid[1] ^ uid[2]) << 8 | (uid[2] ^ 8);
@ -224,13 +238,26 @@ uint16_t ul_ev1_packgenD(const uint8_t *uid) {
p ^= 0x5555;
return BSWAP_16(p & 0xFFFF);
}
uint16_t ul_ev1_packgenE(const uint8_t *uid) {
uint32_t pwd = ul_ev1_pwdgenE(uid);
return (0xAD << 8 | ((pwd >> 24) & 0xFF));
}
uint16_t ul_ev1_packgenG(const uint8_t *uid, const uint8_t *mfg) {
init_table(CRC_PHILIPS);
// UID
uint32_t crc1 = crc16_philips(uid, 7);
// MFG string
uint32_t crc2 = crc16_fast(mfg, 10, crc1, false, false);
// PWD
uint32_t pwd = (BSWAP_16(crc2) << 16 | BSWAP_16(crc1));
uint8_t pb[4];
num_to_bytes(pwd, 4, pb);
return BSWAP_16(crc16_fast(pb, 4, crc2, false, false));
}
// default shims
uint32_t ul_ev1_pwdgen_def(const uint8_t *uid) {