Foro de elhacker.net

#include <windows.h>
#include <stdio.h>

typedef unsigned char tiny;

tiny GETCH(void);

int main(void)
{
	tiny input;
	tiny *ptr;
	char password[20];
	int count;
	system("cls"); // too lazy not to cheat here
	count = 0;
	printf("enter your password: ");
	do
	{
		input = GETCH();
		if(input == '\xD') break; // enter pressed?
		putc('*', stdout);
		ptr = &input;
		password[count] = *ptr;
		count++;
	}while(count < 20);
	
	password[count++] = '\0'; // terminate the string
	printf("\nyour password: %s\n", password);

	return 0;
}

tiny GETCH(void)
{
	tiny key;

	_asm
	{

start:
		mov ah,0
		int 0x16
		cmp al,0
		je start ; don't process special keys
		mov key,al
	}

	return key;
}

#include <windows.h>
#include <stdio.h>

#include <iostream>
#include <stdexcept>
#include <string>
#include <windows.h>
using namespace std;

string getpassword( const string& prompt = "Enter password> " )
  {
  string result;

  // Set the console mode to no-echo, not-line-buffered input
  DWORD mode, count;
  HANDLE ih = GetStdHandle( STD_INPUT_HANDLE  );
  HANDLE oh = GetStdHandle( STD_OUTPUT_HANDLE );
  if (!GetConsoleMode( ih, &mode ))
    throw runtime_error(
      "getpassword: You must be connected to a console to use this program.\n"
      );
  SetConsoleMode( ih, mode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT) );

  // Get the password string
  WriteConsoleA( oh, prompt.c_str(), prompt.length(), &count, NULL );
  char c;
  while (ReadConsoleA( ih, &c, 1, &count, NULL) && (c != '\r') && (c != '\n'))
    {
    if (c == '\b')
      {
      if (result.length())
        {
        WriteConsoleA( oh, "\b \b", 3, &count, NULL );
        result.erase( result.end() -1 );
        }
      }
    else
      {
      WriteConsoleA( oh, "*", 1, &count, NULL );
      result.push_back( c );
      }
    }

  // Restore the console mode
  SetConsoleMode( ih, mode );

  return result;
  }

int main()
  {
  try {

    string password = getpassword( "Enter a test password> " );
    cout << "\nYour password is " << password << endl;

    }
  catch (exception& e)
    {
    cerr << e.what();
    return 1;
    }

  return 0;
  }