#include<iostream>
using namespace std;
void keygenerate(char *input,char *key,char *output){
int k[256];
for(int i=0;i<255;i++){
s[i]=i;
k[i]=key[i % keylen(key)];
}
int j=0;
for(i=0;i<255;i++){
j=(j+s[i]+k[i]) % 256;
swap(s[i],s[j]);
}

int temp1= strlen(input)+1;
i=j=0;
for(int temp2=0;temp2<temp1;temp2++){
i=(i+1) % 256;
j=(j+s[i])%256;
swap(s[i],s[j]);
t=(s[i]+s[j])%256;
if(s[t]==input[temp2])
temp1[temp2]=input[temp2];
else
temp1[temp2]=s[t]^input[temp2];
}
temp1[temp2]='/0';
for(temp2=0;temp2<input;temp2++)
output[temp2]=temp1[temp2];
delete temp1;
}
//c=m XOR s[t];

int main(){
char *message;
char *encryption;
char *decryption;
char *k;
message="Network security assignment";
k="asd";
keygenerate(messaage,k,encryption);
keygenerate(encrypted,k,decryption);
cout<<"Plain text:"<<message;
cout<<"key:"<<k;
cout<<"Encrypted & Decrypted form" << excryption <<","<<decryption;
system("PAUSE");
}