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  1. #include <iostream>
  2. #include <vector>
  3. #include <sstream> //this is where istringstream is defined
  4.  
  5. using namespace std;
  6.  
  7.  
  8. int x(unsigned int tab[],int numBit){
  9.     return ((tab[numBit / 32] >> (numBit % 32))&1);
  10. }
  11.  
  12. void set(unsigned int tab[],unsigned int numBit,unsigned int v){
  13.     unsigned int t=(unsigned int)v<<(numBit%32);
  14.     unsigned int m=(unsigned int)1<<(numBit%32);
  15.  
  16.     unsigned int o=(tab[numBit / 32]);
  17.     o=o&~m;
  18.     tab[numBit / 32] = o | t;
  19. }
  20.  
  21. struct Formule{
  22.     unsigned int formuleL[512];
  23.     unsigned int formuleR[512];
  24.     unsigned int fsp=0;
  25.  
  26.    void add(unsigned int a,unsigned int b){
  27.        formuleL[fsp]=a;
  28.        formuleR[fsp]=b;
  29.        fsp++;
  30.    }
  31. };
  32.  
  33. int main(){
  34.   int size;
  35.  
  36.    cout<<"funWithFormule"<<endl;
  37.   string is="256\n 320a18d5 b61b13f6 1aaaa61c 0afe2a41 1a4ff107 84cc2efc 956ff31d fa595299 33749a7f 6cc9659d dc503569 ef4d0ef5 73b746c5 b8fb36d3 7616e9d6 b21251c4\n";
  38.   std::istringstream sin(is);
  39.   sin >> size;
  40.  
  41.   unsigned int* a = new unsigned int[size / 16]; // <- input tab to encrypt
  42.   unsigned int* b = new unsigned int[size / 16]; // <- output tab
  43.    Formule *formule=new Formule[size*2];
  44.   for(int i=0;i<size* 2;i++){
  45.       formule[i].fsp=0;
  46.   }
  47.   cout<<"funWithFormule begin read"<<endl;
  48.  
  49.     for (int i = 0; i < size / 16; i++) {   // Read size / 16 integers to a
  50.       sin >> hex >> a[i];
  51.     }
  52.  
  53.     for (int i = 0; i < size / 16; i++) {   // Write size / 16 zeros to b
  54.       b[i] = 0;
  55.     }	  
  56.     for (int i = 0; i < size; i++)
  57.     for (int j = 0; j < size; j++){
  58.         formule[i+j].add(i,j+size);
  59.  
  60.         //set(b,i+j, x(b,i+j)^(x(a,i)&x(a,j+size)));
  61.     }
  62.   cout<<"funWithFormule apply formulaes"<<endl;
  63.     for(int i=0;i<size*2;i++){
  64.         //cout<<i<<endl;
  65.         unsigned int xo=0;
  66.         for(int k=0;k<formule[i].fsp;k++){
  67.             unsigned int v= x(a,formule[i].formuleL[k]) & x(a,formule[i].formuleR[k]);
  68.             xo^=v;
  69.         }
  70.  
  71.         set(b,i, xo  );
  72.     }
  73.  
  74.     for(int i = 0; i < size / 16; i++)
  75.       cout << hex << b[i] << " ";       // print result  
  76.  
  77. }
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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funWithFormule
funWithFormule begin read
funWithFormule apply formulaes
4af6fc33 39029380 465c5267 c72f6a8b 906e6d0 ca60550f 14a5e47c 42ad10fb 4a3bb446 bb74360a 5ea02b9c 23c68553 3fade253 e270ba24 39e141ad 6c38c43d
https://ideone.com/8RH0Yr
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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