Login System

Hello there.

I'm creating a Database for my 6th Form Business, and need a way to write a login system to make it secure from rival Business. Nothing too fancy, it's just a 6th form Business after all :)

Anyways, I have a running database with a few menu's. It's not complete yet, as you can't record data. I havn't gotten round to that yet. But I need a login system, and I have no idea where to start, so thats where you guys come in :P

Can you programmers point me in the direction of a tutorial to help me achieve this?

All help is appreciated.

Depends how you want to do it. You could do something as simple as:

Code:

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std::string name, pwrd;

std::cout<< "Enter name: ";
std::cin >> name;

std::cout<< "And password: ";
std::cin >> pwrd;

if ( name != "name" && pwrd != "password" ) {
  std::cout<< "Login failed.";
  return 1;
}

// You're now logged in.

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That seems pretty simple, thanks!

I will try that one out. But I'm also wondering on a stream based login system. Like writing the Usernames and Passwords to a .txt file and reading them from there.

Then read up about file input and output.

Thanks, I have, it all looks a wee bit to complicated right now, so i'll get back to it when i've learned more.

Here is something from my personal telnet/ftp program.
//user_file.txt

Code:

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username:password
fun:in the bright sun
whatDOyouCall:youselfINtheMirror

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I've replaced my NetworkClient.send() with std::out so you can compile this.
the return value is 0 if the user fails to loging.
anything else is the User ID to the system.
The format of the User_File.txt determins which user gets what userid.
basicly which line number their user:pass appars on.

Code:

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#include <iostream>
#include <fstream>
#include <vector>
struct login{
        char name[26], pass[26];
};
int loginuser(std::string filepath){
        std::fstream                User_File;
        std::vector<login>        User_List;

        User_File.open("user_file.txt", std::ios::in);
        if(User_File.is_open()){
                login temp;
                //populate the user list.
                do{
                        memset(&temp, 0, sizeof(temp));
                        User_File.getline(&temp.name[0], sizeof(temp.name), ':');
                        User_File.getline(&temp.pass[0], sizeof(temp.pass));
                        User_List.push_back(temp);
                        if(User_File.bad()){
                                User_List.clear();
                                throw( std::string("File read error") );               
                        }
                        if(User_File.eof()){
                                User_List.pop_back(); //Do this to remove the blank entry at the end of the list.
                                break;
                        }
                }while(1);
                //get the terminal account incormation
                std::cout << "Enter your Username: ";
                std::cin.getline(&temp.name[0], sizeof(temp.name));
                std::cout << "Enter your Password: ";
                std::cin.getline(&temp.pass[0], sizeof(temp.pass));
               
                //if the terminal user entered nothing.
                if( !strlen(temp.name) || !strlen(temp.pass) ){
                        std::cout << "User cancled login" << std::endl;
                        return 0;
                }
                for(int x = User_List.size();x; x--){
                        if( strcmp(temp.name, User_List[x-1].name) == 0){
                                if( strcmp(temp.pass, User_List[x-1].pass) == 0)
                                        return x; //We found a winner
                        }
                }
        }else{
                throw( std::string("User File could not be opened") );
        }       
        return 0;
}

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Also to delete a user just put a colon on their login line. and line 36 of the function will take care of it.

Code:

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username:password
fun:
whatDOyouCall:youselfINtheMirror

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