BULME-6ABELI / Schwarz_03_Nr74_PwGen

Random PW Generator

main.cpp@0:4b30ded991e6, 2020-05-03 (annotated)

Committer:
stefanblack
Date:
Sun May 03 14:28:47 2020 +0000
Revision:
0:4b30ded991e6
Nr74

Who changed what in which revision?

UserRevisionLine numberNew contents of line
stefanblack 0:4b30ded991e6 1 /*
stefanblack 0:4b30ded991e6 2
stefanblack 0:4b30ded991e6 3 C++ Kurs 6ABELI SM
stefanblack 0:4b30ded991e6 4 Aufgabe 3 Übung NR 74 -- Passwortgenerator
stefanblack 0:4b30ded991e6 5 Stefan Schwarz
stefanblack 0:4b30ded991e6 6
stefanblack 0:4b30ded991e6 7 Übung Nr.74:
stefanblack 0:4b30ded991e6 8
stefanblack 0:4b30ded991e6 9 Erstelle ein Programm/Funktion welche/s ein zufälliges Passwort erzeugt.
stefanblack 0:4b30ded991e6 10 Als Parameter soll die Länge sowie die Art der darin vorkommenden Zeichen übergeben werden können.
stefanblack 0:4b30ded991e6 11 Zur Auswahl sollen stehen: Kleinbuchstaben, Großbuchstaben, Zahlen und Sonderzeichen.
stefanblack 0:4b30ded991e6 12 Jede beliebige Kombination der Parameter soll möglich sein.
stefanblack 0:4b30ded991e6 13
stefanblack 0:4b30ded991e6 14 */
stefanblack 0:4b30ded991e6 15
stefanblack 0:4b30ded991e6 16
stefanblack 0:4b30ded991e6 17 #include <algorithm>
stefanblack 0:4b30ded991e6 18 #include <stdio.h>
stefanblack 0:4b30ded991e6 19 #include <iostream>
stefanblack 0:4b30ded991e6 20 #include <cstdlib>
stefanblack 0:4b30ded991e6 21 #include <ctime>
stefanblack 0:4b30ded991e6 22
stefanblack 0:4b30ded991e6 23
stefanblack 0:4b30ded991e6 24 using namespace std;
stefanblack 0:4b30ded991e6 25
stefanblack 0:4b30ded991e6 26 // function generates new password based on given parameters
stefanblack 0:4b30ded991e6 27 string genpw(int lengh, string number, string smallletter, string bigletter, string signs);
stefanblack 0:4b30ded991e6 28
stefanblack 0:4b30ded991e6 29
stefanblack 0:4b30ded991e6 30 int main()
stefanblack 0:4b30ded991e6 31 {
stefanblack 0:4b30ded991e6 32 int lengh;
stefanblack 0:4b30ded991e6 33 string numbers;
stefanblack 0:4b30ded991e6 34 string smallletter;
stefanblack 0:4b30ded991e6 35 string bigletter;
stefanblack 0:4b30ded991e6 36 string signs;
stefanblack 0:4b30ded991e6 37
stefanblack 0:4b30ded991e6 38 //setting parameters via Console
stefanblack 0:4b30ded991e6 39 cout<<" Wilkommen im Passwortgenerator !"<< endl << endl;
stefanblack 0:4b30ded991e6 40 again:
stefanblack 0:4b30ded991e6 41 cout << "Wie lange soll das Passwort sein? " ;
stefanblack 0:4b30ded991e6 42 cin >> lengh;
stefanblack 0:4b30ded991e6 43 cout << "Ziffern? J/N ";
stefanblack 0:4b30ded991e6 44 cin.get();
stefanblack 0:4b30ded991e6 45 cin >> numbers;
stefanblack 0:4b30ded991e6 46 cin.get();
stefanblack 0:4b30ded991e6 47 cout << "Kleinbuschstaben? J/N " ;
stefanblack 0:4b30ded991e6 48 cin >> smallletter;
stefanblack 0:4b30ded991e6 49 cout << "Großbuschstaben? J/N " ;
stefanblack 0:4b30ded991e6 50 cin >> bigletter;
stefanblack 0:4b30ded991e6 51 cout << "Sonderzeichen? J/N " ;
stefanblack 0:4b30ded991e6 52 cin >> signs;
stefanblack 0:4b30ded991e6 53
stefanblack 0:4b30ded991e6 54 // check if theres at least one chosen parameter
stefanblack 0:4b30ded991e6 55 if(numbers!="J" && smallletter!="J" && bigletter!="J" && signs!="J")
stefanblack 0:4b30ded991e6 56 {
stefanblack 0:4b30ded991e6 57 cout << "Min 1 Parameter muss gewählt werden! Bitte erneute Eingabe:"<<endl;
stefanblack 0:4b30ded991e6 58 goto again;
stefanblack 0:4b30ded991e6 59 }
stefanblack 0:4b30ded991e6 60
stefanblack 0:4b30ded991e6 61 //print newly generated password
stefanblack 0:4b30ded991e6 62 cout << endl << genpw(lengh,numbers,smallletter,bigletter,signs);
stefanblack 0:4b30ded991e6 63
stefanblack 0:4b30ded991e6 64
stefanblack 0:4b30ded991e6 65 }
stefanblack 0:4b30ded991e6 66
stefanblack 0:4b30ded991e6 67
stefanblack 0:4b30ded991e6 68 // genpw function generates new password based on given parameters
stefanblack 0:4b30ded991e6 69 string genpw(int lengh, string number, string smallletter, string bigletter, string signs ){
stefanblack 0:4b30ded991e6 70
stefanblack 0:4b30ded991e6 71 string newpw = "";
stefanblack 0:4b30ded991e6 72 string coderes = "";
stefanblack 0:4b30ded991e6 73 string numb = "123456789";
stefanblack 0:4b30ded991e6 74 string slbs = "abcdefghijklmnopqrstuvwxyz";
stefanblack 0:4b30ded991e6 75 string blbs = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
stefanblack 0:4b30ded991e6 76 string sgn = "@!§$%&/()=?*':;";
stefanblack 0:4b30ded991e6 77
stefanblack 0:4b30ded991e6 78 if (number == "J")
stefanblack 0:4b30ded991e6 79 coderes += numb;
stefanblack 0:4b30ded991e6 80 if (smallletter == "J")
stefanblack 0:4b30ded991e6 81 coderes += slbs;
stefanblack 0:4b30ded991e6 82 if (bigletter == "J")
stefanblack 0:4b30ded991e6 83 coderes += blbs;
stefanblack 0:4b30ded991e6 84 if (signs == "J")
stefanblack 0:4b30ded991e6 85 coderes += sgn;
stefanblack 0:4b30ded991e6 86
stefanblack 0:4b30ded991e6 87 srand(time(0));
stefanblack 0:4b30ded991e6 88
stefanblack 0:4b30ded991e6 89 for (unsigned int i = 0; i < lengh; i++)
stefanblack 0:4b30ded991e6 90 {
stefanblack 0:4b30ded991e6 91 random_shuffle(coderes.begin(), coderes.end()); //shuffeling available characters in addition to randomly picked ones
stefanblack 0:4b30ded991e6 92
stefanblack 0:4b30ded991e6 93 int sizeres= sizeof(coderes); //
stefanblack 0:4b30ded991e6 94 newpw+=coderes[rand()% sizeres]; //building newpw string randomly
stefanblack 0:4b30ded991e6 95 }
stefanblack 0:4b30ded991e6 96 return "Das generierte Passwort lautet: "+ newpw;
stefanblack 0:4b30ded991e6 97
stefanblack 0:4b30ded991e6 98
stefanblack 0:4b30ded991e6 99 }