IMG::UnpackData

// Unpacks data
void IMG::UnpackData(
        eCompressionType compressionType,
        eEncryptionType encryptionType,
        const char* encryptionKey,
        void* UnpackedPtr,
        unsigned long UnpackedSize,
        const void *PackedPtr,
        size_t MaxPackedSize
        )
{
    switch(encryptionType)
    {
    case ENCRYPTION_TYPE_NONE:
        {
            memcpy(UnpackedPtr, PackedPtr, UnpackedSize);
            break;
        }

    case ENCRYPTION_TYPE_GTAIV_AES:
        {
            CRijndael oRijndael;
            oRijndael.MakeKey(encryptionKey, CRijndael::sm_chain0, 32, 16);

            char* xPackedPtr = new char[MaxPackedSize];
            memcpy(xPackedPtr, PackedPtr, MaxPackedSize);

            unsigned long DecryptionSize = MaxPackedSize / 16 * 16;
            unsigned long RemainderSize = MaxPackedSize % 16;

            for(int i = 0; i < 16; i++)
            {
                oRijndael.Decrypt((const char*)xPackedPtr, (char*)UnpackedPtr, DecryptionSize, CRijndael::ECB);
                memcpy(xPackedPtr, UnpackedPtr, MaxPackedSize);
            }

            memcpy((char*)UnpackedPtr + DecryptionSize, (char*)PackedPtr + DecryptionSize, RemainderSize);

            delete xPackedPtr;
            break;
        }
    }
}