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@atc1441
Last active February 8, 2024 12:22
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#include <stdio.h>
#include <stdint.h>
// Philips Sonicare NFC Head Password calculation by @atc1441 Video manual: https://www.youtube.com/watch?v=EPytrn8i8sc
uint16_t CRC16(uint16_t crc, uint8_t *buffer, int len) // Default CRC16 Algo
{
while(len--)
{
crc ^= *buffer++ << 8;
int bits = 0;
do
{
if ( (crc & 0x8000) != 0 )
crc = (2 * crc) ^ 0x1021;
else
crc *= 2;
}
while ( ++bits < 8 );
}
return crc;
}
uint8_t nfctag_uid[] = {0x04,0xEC,0xFC,0xA2,0x94,0x10,0x90}; // NTAG UID
uint8_t nfc_second[] = "221214 12K"; // Head MFG String, printed on Head and at memory location 0x23
int main()
{
uint32_t crc_calc = CRC16(0x49A3, nfctag_uid, 7); // Calculate the NTAG UID CRC
crc_calc = crc_calc | (CRC16(crc_calc, nfc_second, 10) << 16); // Calculate the MFG CRC
crc_calc = (crc_calc >> 8) & 0x00FF00FF | (crc_calc << 8) & 0xFF00FF00; // Rotate the uin16_t bytes
printf("by @ATC1441 NFC CRC : 0x%08X expected: 0x61F0A50F\r\n", crc_calc);// Print out the calucated password
return 0;
}
@filipsworks
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More beefy python version with built in command generator and ability to set # of sessions left:
https://github.com/filipsworks/SoniKraker

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