XOR Encryption Class
XOR Encryption Class
Here is a simple XOR encryption class:
Now an example of how to use.
First you create an object of the XOR class:
Then to encrypt a string and save it to a variable, you would do:
The same function would decrypt the encrypted string, so to get it back, you would do:
You can use this to encrypt strings in a hack, or anywhere else 
Code:
class XOR{
protected:
char key[256];
public:
XOR(){
key="fjsldjf84937fd7f6s876df52396tegulhghs87f53f8w987r8970w987erSDFJDFLJSGHHEIHWOHGKDFGSLGDKHSLKDGH";
}
char* xorStr(char *string){
const static int len = strlen(string);
char* temp = new char(len);
for(int i = 0; i < len+1;i++)
temp[i] = string[i]^key[i];
return temp;
}
};
First you create an object of the XOR class:
Code:
XOR* xor = new XOR();
Code:
char* x=xor->xorStr("lol");
Code:
char* orig=xor->xorStr(x);
You realize people can view the "lol" string when you call xorStr
Create a separate app to generate encrypted strings, and decrypt them in your actual program...?
Originally Posted by Saltine
Create a separate app to generate encrypted strings, and decrypt them in your actual program...?
Originally Posted by Refrain
There lies the problem, you can't do that with the class you posted
Edit: fixed
Originally Posted by Saltine
I realize that now, with my random key generation, I shall fix it, now.
Edit: fixed
its not really encrypting if we can still see the string...
Originally Posted by supercarz1991
its not really encrypting if we can still see the string...
Code:
#ifndef _XOR_H
#define _XOR_H
template <int XORSTART, int BUFLEN, int XREFKILLER>
class XorStr
{
private:
XorStr();
public:
char s[ BUFLEN ];
XorStr( const char * xs );
~XorStr()
{
for ( int i = 0; i < BUFLEN; i++ ) s[ i ]=0;
}
};
template <int XORSTART, int BUFLEN, int XREFKILLER>
XorStr<XORSTART,BUFLEN,XREFKILLER>::XorStr( const char * xs )
{
int xvalue = XORSTART;
int i = 0;
for ( ; i < ( BUFLEN - 1 ); i++ )
{
s[ i ] = xs[ i - XREFKILLER ] ^ xvalue;
xvalue += 1;
xvalue %= 256;
}
s[ BUFLEN - 1 ] = 0;
}
#endif
its different from the other one i saw
Originally Posted by AVGN
Code:
#ifndef _XOR_H
#define _XOR_H
template <int XORSTART, int BUFLEN, int XREFKILLER>
class XorStr
{
private:
XorStr();
public:
char s[ BUFLEN ];
XorStr( const char * xs );
~XorStr()
{
for ( int i = 0; i < BUFLEN; i++ ) s[ i ]=0;
}
};
template <int XORSTART, int BUFLEN, int XREFKILLER>
XorStr<XORSTART,BUFLEN,XREFKILLER>::XorStr( const char * xs )
{
int xvalue = XORSTART;
int i = 0;
for ( ; i < ( BUFLEN - 1 ); i++ )
{
s[ i ] = xs[ i - XREFKILLER ] ^ xvalue;
xvalue += 1;
xvalue %= 256;
}
s[ BUFLEN - 1 ] = 0;
}
#endif
its different from the other one i saw
[at]Thread:
I'm not really sure why you need to make this a class; it doesn't contain any instance-specific info. Would make a lot more sense as a single function, with a param to set a dynamic key. Also, as soon as someone tries to encrypt a string with more chars than the "key", it's going to break. Not sure why the length of the string is static either
Originally Posted by Jason
What a pointless use of templates lol.
[at]Thread:
I'm not really sure why you need to make this a class; it doesn't contain any instance-specific info. Would make a lot more sense as a single function, with a param to set a dynamic key. Also, as soon as someone tries to encrypt a string with more chars than the "key", it's going to break. Not sure why the length of the string is static either
Originally Posted by ISmokeWeedAmICoolNow
it cant be a single function. it has to store the unencrypted string somehow and clean it up later.
Originally Posted by Jason
Of course you're right! Functions can't return data, how stupid of me.
nice memory leak.
When you encrypt the string "127.0.0.1" you still see the PUSH to the 127.0.0.1.
If you edit it to "127.0.0.2", the program would encrypt 127.0.0.2.
If you edit it to "127.0.0.2", the program would encrypt 127.0.0.2.
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