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

using namespace std;

//const string SALT {"$1$"};
//const string SALT {"$5$"};
//const string SALT {"$6$"};
//// the new version of crypt can require additional rounds of encryption
const string SALT {"$6$rounds=10000$"};

// encryption of "bob" for salt $6$.
const string BASE {"$6$$39NHYxvD3B.eNHoE5SL7He9jiWu/uJ84xTPPdpLvIvNFzKrAW/NQu2vkO1gi959rs1p2hBFtVBa9JjeIj6DTG/"};
const string PASSWORD {"bob"} ;

const int ITERATIONS = 1000;

int main() {
    string hash;
    int i;

    auto start = chrono::steady_clock::now();
    for(i = 0; i < ITERATIONS ; ++ i) {
        hash = crypt(PASSWORD.c_str(), SALT.c_str());
        hash == BASE;
    }
    auto end = chrono::steady_clock::now();

    chrono::duration<double> seconds = end-start;
    double iterationsPerSecond =  static_cast<double>(ITERATIONS)
                                 / static_cast<double>(seconds.count());

    cout << "\tThat took " << seconds.count() << " seconds for  "
         << ITERATIONS << " passwords." << endl;
    cout << "\tOr " << iterationsPerSecond<< "  passwords/second " <<  endl;

    return 0;
}