Function Platform_Decrypt

src/_PlatformBase.h:330–359

}

cc_result Platform_Decrypt(const void* data, int len, cc_string* dst) {
	const cc_uint8* src = (const cc_uint8*)data;
	cc_uint32 header[4], key[4] = { 0 };
	cc_result res;
	int dataLen;

	/* Total size must be >= header size */
	if (len < 16) return ERR_END_OF_STREAM;
	if ((res = GetMachineID(key))) return res;

	Mem_Copy(header, src, 16);
	DecipherBlock(header + 0, key);
	DecipherBlock(header + 2, key);

	if (header[0] != ENC1 || header[1] != ENC2 || header[2] != ENC3) return ERR_INVALID_ARGUMENT;
	len -= 16; src += 16;

	if (header[3] > len) return ERR_INVALID_ARGUMENT;
	dataLen = header[3];

	for (; dataLen > 0; len -= ENC_SIZE, src += ENC_SIZE, dataLen -= ENC_SIZE) 
	{
		header[0] = 0; header[1] = 0;
		Mem_Copy(header, src, min(len, ENC_SIZE));

		DecipherBlock(header, key);
		String_AppendAll(dst, header, min(dataLen, ENC_SIZE));
	}
	return 0;
}
#endif