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Home » Developing U++ » UppHub » Protect package - A starting copy protection system
Re: Protect package - A starting copy protection system [message #29024 is a reply to message #29010] Sat, 02 October 2010 16:00 Go to previous messageGo to previous message
281264 is currently offline  281264
Messages: 270
Registered: June 2010
Location: Spain
Experienced Member
Hi Massimo,

I am finding some unexpected outcome. The problem seems to be related with the key. The encryption key I am using is AABBCCDDEEFF00112233445566778899 (as shown, without quotes); the GetKey function is as the example:
String GetKey(void)
{
	// WARNING -- TO PUT A NULL BYTE (0X00) INSIDE KEYSTRING
	// REQUIRES SOME ADDITIONAL WORK !
	String k = "\xAA\xBB\xCC\xDD\xEE\xFF";
	k.Cat('\x00');
	k += "\x11\x22\x33\x44\x55\x66\x77\x88\x99";
	return k;
}

The application compiles well and it runs fine, but it does not recognize the kye!

Where is the bug?

Remarks:

1.- can I use an ASCII String, such as “AA………99” without the hex format?
2.- what is len in the PROTECT_DECRIPT function? The length of the key, perhaps (the it should be 16bytes or 32 bytes)?


Thank you,

Javier

 
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