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Chris Losinger wrote:
allocate huge (100MB) chunks of memory for no reason, put a random delay in a message pump, disable random controls
Is it just me, or does anyone else get that "don't piss Chris off" kinda feeling from this post? 
Jeremy L. Falcon
"The One Who Said, 'The One Who Said...'"
Homepage: imputek.com
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nobody's gonna get my $29.95 without a fight, that's for damn sure!
-c
Ah, but a programmer's reach should exceed his grasp, or what are late nights for?
Smaller Animals Software, Inc.
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Chris Losinger wrote:
if you're clever, you can use the CRC check to do subtle failures; don't just pop up a message box and quit, do something strange - allocate huge (100MB) chunks of memory for no reason, put a random delay in a message pump, disable random controls - make it look like the crack attempt has broken something vital inside the app.
My variation on this for inside of a computer game would be to make the game not as fun or easy with a cracked version. For instance:
The cracked players health always drops 4 * times as fast as a legitimate version. Ammunition or money dissappear faster than normal. Hardly any damage is incurred from their weapons.
All in all I think that it is a very clever way to thwart hackers, because they will never really know if they have gotten rid of all of the security checks.
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Lots of good ideas Chris. In addition I'd suggest doing various checks in a separate thread and also using PostMessage to hide what's happening. Challenge - response is another technique to look at. I use a range of techniques in ED.
If anyone has some spare time on their hands I'd be interested to see if they can crack ED's licensing. By that I mean change the Free Trial version into a full working version. A free copy to anyone that can.;P
Neville Franks, Author of ED for Windows. www.getsoft.com
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One simple technique to slow brute force techniques down is to add a short sleep after the validation is done.
Also don't inform the user that the Rego code is wrong, then and there, but some time later. In ED the user uses Help|Registration to enter the license details, but they need to use Help|About to see if the license was accepted.
The fravia pages mentioned elsewhere are a great source of information.
Neville Franks, Author of ED for Windows. www.getsoft.com
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Thanks Mauricio for starting a very interesting thread.
Chris is obviously well versed in protecting his software. The concept is to think like a cracker and defeat him through a combination of frustration and wasted time.
All us programmers who chase bugs find it really annoying when we think the bug is fixed, and it crops up again 2 days later!
Imagine how it makes a cracker feel when every time he (BTW, are there any female crackers...or does one require high-levels of testosterone to be a complete d@$&head?) thinks he's broken your security, it stops working again.
And, of course, there's the most important formula:
B = P * U * K
where B is the benefit derived in cracking your product
P is the price of your product
U is the popularity of your product
K is the kudos the cracker gets from his peers
So, if your product costs a lot or is really popular, then you need the best protection possible.
We're in the process of releasing a product that addresses all the critical issues in Software Protection.
For a chance to *win* some great prizes, why not complete our survey? This isn't advertising, but a genuine survey - and there's no advertising on our site, so we're not even trying to increase our hit counts!
So, if you'd like to see a well design product that meets your needs, please complete our survey. To participate in the survey, visit our developers' site at dev.rootsoftware.com
Russell Robinson (russellr@rootsoftware.com)
Author of TTMaker (Advanced Timetabling Software)
http://www.rootsoftware.com
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Hi,
I would like to load a gray image(which is been stored in a file).Does anyone knows anything, that is specific to gray image(other than true color 24 bit rgb)?
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LoadImage() has a LR_MONOCHROME flag
-Jack
To an optimist the glass is half full.
To a pessimist the glass is half empty.
To a programmer the glass is twice as big as it needs to be.
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LR_MONOCHROME "loads the image in black and white", according to MSDN. May not work for grayscale.
Tomasz Sowinski -- http://www.shooltz.com
- It's for protection
- Protection from what? Zee Germans?
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It is a gray image not B/W.
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What kind of file it is? .bmp?
Tomasz Sowinski -- http://www.shooltz.com
- It's for protection
- Protection from what? Zee Germans?
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LoadImage will work. In fact, it should work with all .bmp files - just use LR_LOADFROMFILE flag.
Tomasz Sowinski -- http://www.shooltz.com
- It's for protection
- Protection from what? Zee Germans?
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What is specific to grey images is they do not have more than 256 colours because all the grey colours have the same r g and b values. But as has been said, there is not reason the computer will even realise an image is grey when it loads it, using any standard method, such as loadimage.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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The best way of being sure that the image you load is greyscale, would be to greyscale it yourself upon loading. Do this by setting r,g,b each to the same value, (r+g+b)/3.
Sorry to dissapoint you all with my lack of a witty or poignant signature.
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class A
{
public:
A()
{
}
virtual ~A()
{
}
void (A::*ptFunc)();
};
class B:public A
{
public:
B()
{
ptFunc = &(B::b_func);
}
virtual ~B()
{
}
void b_func()
{
cout<<"B::b_func"<
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I have think it out, thank you 
#include <iostream.h>
template <class T>
class A
{
public:
A()
{
}
virtual ~A()
{
}
void (T::*ptFunc)();
};
class B:public A<B>
{
public:
B()
{
ptFunc = &(B::b_func);
}
virtual ~B()
{
}
void b_func()
{
cout<<"B::b_func"<<endl;
}
};
int main()
{
B b;
(b.*(b.ptFunc))();
return 0;
}
I'm amumu, and you?
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But now I meet another question:
I want to define a array whose item is pointer of A<t>, which may be store B or C or D ( any classes inherited from A<t> ), how to write it?
I'm amumu, and you?
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By creating an array of pointers to A. OR even better, a std::vector of pointers to A, but if you use a vector, remember to call delete on items before removing them.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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Christian Graus wrote:
if you use a vector, remember to call delete on items before removing them.
The same thing applies to plain array...
Tomasz Sowinski -- http://www.shooltz.com
- It's for protection
- Protection from what? Zee Germans?
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Tomasz Sowinski wrote:
Christian Graus wrote:
if you use a vector, remember to call delete on items before removing them.
The same thing applies to plain array...
Yes, and no. A plain array does not offer an erase method, which a beginner would probably assume will clean up after them, therefore it's probably more obvious with a plain array that you need to delete your pointers.
But you're right, I should have clarified, lest I give the impression that I was saying that somehow a vector makes it necessary to call delete
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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No,no,no, my meaning is how to write like the following code:
A<T>* ptA;
B b;
C c;
ptA=&b; //upcast here
ptA->xxx();
ptA=&c; //upcast here
ptA->xxx();
But the "A<T>* ptA" is invalid, because it need instantiation here, I must fill the T with B or C, but if I write A<B>* ptA, then ptA=&c is invalid, the same as writing A<C>* ptA.
Now I want to know, how to define a pointer can pointer b or c?
I'm amumu, and you?
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By definition, a pointer to A can be set to be a new B or C, if B and C derive from A. I don't know that passing an address should work any different. Why can't the B and C instances be stored as pointers ?
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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Because I need dynamic load B or C or D, from the viewpoint of main program, it only know A, (B C D)is developed later and loaded later.
I'm amumu, and you?
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Hi guys,
I have implemented the code that dinamically change my toolbar's tooltips in CMainFrame. I found the code in WinFrm.cpp.
The problem is that I cannot access CMainFrame thru the Wizard anymore. Meaning that I cannot add anymore handlers.
Any advice is appreciated.
The code is :
CMainFrame.Cpp
ON_NOTIFY_EX_RANGE(TTN_NEEDTEXT, ...., ..., ...)
ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTA, ...., ..., ...)
ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTW, ...., ..., ...)
CMainFrame.h
afxmsg BOOL OnToolTipText (..., ..., ..., ...)
Thanks.
Louis
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