macOS LogKext Decryption

[Nirvana5253]

Ok so I changed the password on LogKext and it wont decrypt my logfile- nothing new. My question is - In looking at the code I can see that the following encryption scheme is used to decrypt the logfile :
printf("Using encryption key %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
((char*)passData)[0]&0xff,((char*)passData)[1]&0xff,((char*)passData)[2]&0xff,((char*)passData)[3]&0xff,
((char*)passData)[4]&0xff,((char*)passData)[5]&0xff,((char*)passData)[6]&0xff,((char*)passData)[7]&0xff,
((char*)passData)[8]&0xff,((char*)passData)[9]&0xff,((char*)passData)[10]&0xff,((char*)passData)[11]&0xff,
((char*)passData)[12]&0xff,((char*)passData)[13]&0xff,((char*)passData)[14]&0xff,((char*)passData)[15]&0xff);
*/


Is there anyway to reverse engineer a code to decrypt my old log file?