How to make this work?

[MasterHacker110]

I have this RSA encryption code but it doesnt encrypt the whole message its suppose to encrypt. It only encrypts

#include <iostream>
#include <string>
#include <string.h>

using namespace std;

// prime numbers
int p, q;
//compute
int n ;//= p * q;
//totient
int phi;// = (p - 1) * (q - 1);

int e; // not devider of phi;
int d;//= e mod phi;

int main()
{
    p = 3;
    q = 7;
    phi = (q - 1) * (p - 1);
    e = 69;
    d = (e % phi);
    n = p * q;

    long long c, dc, m;

    string msg, msg2, msg3;
    msg = "hallo";
    int i;
    for(i = 0; i < msg.size(); i++)
    {
        m = msg[i];
        cout<<m;
    }

    c = m ^ e % d;

    cout<<c<<endl;


    dc = c ^ d & n;

    cout<<char(dc);

}

What am I doing wrong and what can i do to fix it?

[Galbatorix]

What is your intended output?

[MasterHacker110]

My current output is just 'h'
it is suppose to output the entire message: 'hallo'

This tells me that it only encrypts the first letter of the word thus when decrypted it would show only the first letter.

I dont know how fix it so that the entire word can be encrypted.
And it apears that there are something wrong with my keys also as when i try to encrypt another word the letter isnt the same as the leter of the other word.

[Moschops]

I see you're using the XOR operator here:

m ^ e

Did you mean to do that, or are you looking for the pow function?

I see that at the end you output a single char only. Is that where you're expecting to see all the char output?

[Gonbe]

Do you mean something like this? (No idea if encryption is right. Just made whatever you did apply to the whole string)

#include <iostream>
#include <string>
using namespace std;

// prime numbers
int p, q;
//compute
int n ;//= p * q;
//totient
int phi;// = (p - 1) * (q - 1);
int e; // not devider of phi;
int d;//= e mod phi;

int main()
{
    p = 3;
    q = 7;
    phi = (q - 1) * (p - 1);
    e = 69;
    d = (e % phi);
    n = p * q;
    long long c, dc, m;
    string msg, msg2, msg3;
    msg = "hallo";
    int i;

    cout << "Original line:\n";

    // Print the ASCII values of the message
    for(i = 0; i < msg.size(); i++)
    {
        // Show the character it is based on.
        cout<< static_cast<int>(msg[i]) << "(" << msg[i] << ") " ;
    }

    cout << "\nEncrypted line:\n";

    // Show the encrypted bytes
    for (i = 0; i < msg.size(); i++)
    {
        c = msg[i] ^ e % d;
        dc = c ^ d & n;
        cout << dc << "(" << static_cast<char>(dc) << ") ";
    }
}

[MasterHacker110]

Thanks Gonbe, it worked