// ClientCDKey::CreateSymmetricKey
// Creates a symmetric key from product name used to save/load CD-Key to/from
// the registry. Symmetric key is created via a series of CRCs on the product.
void
ClientCDKey::CreateSymmetricKey(BFSymmetricKey& theSymKeyR) const
{
WTRACE("ClientCDKey::CreateSymmetricKey");
WDBG_LL("ClientCDKey::CreateSymmetricKey from product=" << mProduct);
CRC16 aCRC;
RawBuffer aBuf;
// CRC the product and use it as 1st 2 bytes of key
aCRC.Put(mProduct);
unsigned short aCheckSum = aCRC.GetCRC();
WDBG_LL("ClientCDKey::CreateSymmetricKey First CRC=" << aCheckSum);
aBuf.assign(reinterpret_cast<unsigned char*>(&aCheckSum), sizeof(aCheckSum));
// CRC each of 1st 3 chars of product and add them to key.
for (int i=0; (i < 3) && (i < mProduct.size()); i++)
{
aCRC.Put(static_cast<unsigned char>(mProduct[i]));
aCheckSum = aCRC.GetCRC();
WDBG_LL("ClientCDKey::CreateSymmetricKey Add CRC=" << aCheckSum);
aBuf.append(reinterpret_cast<unsigned char*>(&aCheckSum), sizeof(aCheckSum));
}
// Create the key
WDBG_LL("ClientCDKey::CreateSymmetricKey Buf=" << aBuf);
theSymKeyR.Create(aBuf.size(), aBuf.data());
}
bool AuthContext::LoadVerifierKey(const std::string &theFile)
{
mCheckedVerifierFile = true;
FILE *aFile = fopen(theFile.c_str(),"rb");
if(aFile==NULL)
return false;
unsigned char aBuf[1024];
RawBuffer aKeyBuf;
while(!feof(aFile))
{
int aNumRead = fread(aBuf,1,1024,aFile);
if(aNumRead>0)
aKeyBuf.append(aBuf,aNumRead);
}
fclose(aFile);
AutoCrit aCrit(GetVerifierCrit());
return mVerifierKey.SetPublicKey(aKeyBuf.data(),aKeyBuf.length());
}
