cdkeydecoder.cpp

int CDKeyDecoder::processStarCraftKey() {
    int accum, pos, i;
    char temp;
    int hashKey = 0x13AC9741;
	char cdkey[14];

	std::strcpy(cdkey, this->cdkey);
    
    // Verification
    accum = 3;
    for (i = 0; i < (int) (keyLen - 1); i++) {
        accum += ((tolower(cdkey[i]) - '0') ^ (accum * 2));
    }
    
	if ((accum % 10) != (cdkey[12] - '0')) {
		// bncsutil_debug_message_a("error: %s is not a valid StarCraft key", cdkey);
        return 0;
	}
    
    // Shuffling
    pos = 0x0B;
    for (i = 0xC2; i >= 7; i -= 0x11) {
        temp = cdkey[pos];
        cdkey[pos] = cdkey[i % 0x0C];
        cdkey[i % 0x0C] = temp;
        pos--;
    }
    
    // Final Value
    for (i = (int) (keyLen - 2); i >= 0; i--) {
        temp = toupper(cdkey[i]);
        cdkey[i] = temp;
        if (temp <= '7') {
            cdkey[i] ^= (char) (hashKey & 7);
            hashKey >>= 3;
        } else if (temp < 'A') {
            cdkey[i] ^= ((char) i & 1);
        }
    }
    
    // Final Calculations
    sscanf(cdkey, "%2ld%7ld%3ld", &product, &value1, &value2);
    
    return 1;
}