Thread: help solve this enigma, please

Hello fellows,

i'm trying to put this code to work, but it's not easy to solve this..
Can you guys help me out, please?

Thank You in advance.

Code:

//<pre> XML 
//Libraries
#include <stdio.h> 
#include <stdlib.h> 
//Global variables
typedef unsigned __int32 uint32_t; 
typedef unsigned __int64 uint64_t; 
//#define N(1<<25) 
#define N 25 
#define F(a,b){(a)^=(a);(a)^=(b);} 
//int d[N]; 
uint32_t d[N]; 
//Main programm: show email
int main(void) 
{ 
//int h,i,j; 
uint64_t h,i,j; 
for(i=1;i<N;i++) 
d[i] = d[i-1] * 69069 + 1; 
for(i=0;i<N;i++) 
for(j=1;j<N;j++) 
if(d[j]=1<d[j-1]) 
F(d[j-1],d[j]) 
h=0; 
for(i=0;i<N;i++) 
h=h*13*d[i]; 
h ^= 0x8678ADF24D4F64EFULL; 
printf("Please, mail to %[email protected]\n",&h); 
return 0; 
} 
//</pre>

One word... indentation.

So what's it not doing?

Double Header! ... hello TheBigH.

What i have to do, is resolve this enigma, to obtain the email, that if everything is good, it will print the email...

i have tried this solution, but the result is the same...still cant decrypt the email.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>

#define N ( 1 << 25)
#define F(a,b){(a)^=(a);(a)^=(b);}
uint32_t d[N];

int comp(const void *a, const void *b)
{
        return *(uint32_t*) b - *(uint32_t*) a;
}


int main(void)
{
   uint64_t h,i,j;

        memset(d, 0, N);
        for(i=1;i<N;i++)
        {
          d[i] = d[i-1] * 69069 + 1;
        }

    printf("sort...\n");

    qsort(d, N, sizeof(uint32_t), comp);

        /*for(i=0;i<N;i++)
        {
          for(j=1;j<N;j++)
          {

             if(d[j]=1<d[j-1])
             {
               F(d[j-1],d[j])
             }
          }
        }*/
      printf("random...\n");

      h = 0;

      for(i=0;i<N;i++)
      {
       h = h*13*d[i];
      }

      h ^= 0x8678ADF24D4F64EFULL;

      printf("Please, mail your to %[email protected]\n",&h);

      return 0;
}

Define ... "If everything is good"...

You want answers you got to give us enough information to know what the heck you're talking about...

This is a test that my University gave me, and the code is incomplete, so what i have to do is find out what is missing here to obtain the final correct email...
When i said " if everything is good" i meant to say if the missing parts of the code were correctly inserted, the correct email will be revealed.

Originally Posted by AndrewHunter

hmm....and where do you get your "email" from?

I now have 2 more questions...

1) How the heck many versions of this thing are floating around?
2) Where is he getting the source code from?

don't know, they just gave me this to solve, and it's making me crazy...can't solve this...

Originally Posted by falcon758

This is a test that my University gave me, and the code is incomplete, so what i have to do is find out what is missing here to obtain the final correct email...
When i said " if everything is good" i meant to say if the missing parts of the code where correctly inserted, the correct email will be revealed.

Homework Policy

We're not going to do your homework for you... especially if we are only going to get half answers...
1) What part of that code was supplied to you?
2) In the parts you've added, what isn't working as expected?
3) How was the email encrypted in the first place?

Originally Posted by AndrewHunter

So why don't you highlight the portions of the code you have inserted. This looks like encryption hw to me.

Problem is, you can't decrypt anything unless you know *exactly* how it is encrypted in the first place...

i don't want that you give me the answer to me, just need some tips to be guided in the correct direction.

1) the part supplied was the first one that i posted.
2) i still obtain the encrypted email, i can't understand what is missing, and why it's not working.
3) Don't know the answer my friend, just know that this code can decrypt it, if i complete it.