Testing randomness of MD5 hashes

#include <iostream>
#include <sstream>

// Need this to remove warnings while using MD5
#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1

#include "rng.h"
#include "md5.h"

using namespace std;
using namespace CryptoPP;

int main( int argc, char** argv )
{
    if( argc < 2 )
    {
        cout << "Usage: ./program [iterations]";
        return 0;
    }

    int runs = atoi( argv[1] );

    MaurerRandomnessTest mt;
    Weak::MD5 md5;

    byte* digest = new byte[16];
    byte* message = new byte[4];

    stringstream first, middle, last;

    for( int i = 0; i < runs; ++i )
    {
        // Convert integer to byte array.
        for( int j = 0; j < 4; ++j )
            message[j] = (byte) ( ( i >> ( j * 8 ) ) & 0x000000FF );

        // Feed MD5 with our message (iteration count) and receive our digest.
        md5.Update( message, 4 );
        md5.Final( digest );


    // Split the digest into three portions. 8 Bytes samples from the beginning,
    // the middle, and the end, respectively.
        for( int j = 0; j <= 7; j++ )
            first << digest[j];

        for( int j = 4; j <= 11; j++ )
            middle << digest[j];

        for( int j = 8; j <= 15; j++ )
            last << digest[j];
    }

    StringStore str( first.str() );
    str.TransferAllTo( mt );

    cout << "First: ";
    if( mt.BytesNeeded() > 0 )
        cout << "Not enough data.";
    else
        cout << mt.GetTestValue();
    cout << endl;

    str = StringStore( middle.str() );
    str.TransferAllTo( mt );

    cout << "Middle: ";
    if( mt.BytesNeeded() > 0 )
        cout << "Not enough data.";
    else
        cout << mt.GetTestValue();
    cout << endl;

    str = StringStore( last.str() );
    str.TransferAllTo( mt );

    cout << "Last: ";
    if( mt.BytesNeeded() > 0 )
        cout << "Not enough data.";
    else
        cout << mt.GetTestValue();
    cout << endl;

    return 0;
}