kodewrita: The challenge is simple and familiar. No time limit involved. participation only if it tickles your fancy. I would hope we would also try to find loopholes where we can.


Challenge: Write a program in any language that takes in a string and checks to see that it is a strong password that follows the following instructions:

---mixture of capitalized and small letters.
---numbers must be there.
---special characters in the following list( +,&,@) {just trying to make it simpler for everyone}
---no spaces

Only restriction: No COBOL. No Smalltalk and definitely no Assembler ( spare our brains )<--Feel free to break this.

Javascript

function isStrongPassword(password) {
   var m = "", i,
   regex = [
      [/[a-z]+/, 'at least one lowercase alphabet'],
      [/[A-Z]+/, 'at least one uppercase alphabet'],
      [/[+&@]+/, "at least one of the characters '+', '&', and '@'"],
      [/[0-9]+/, 'at least one decimal'],
      [/^[^\s]+$/, 'no space character']
   ]

   for (i in regex)
      if (!regex[i][0].test(password))
         m += 'Must contain ' + regex[i][1] + ".\n";

   m == "" ? alert ('Your password is strong.') : alert (m);
}

<?php

    function checkPassword($password){

    if(!preg_match("#[a-z]+#", $password)){
   $error .= "Password must have at least one small letter <br>";
}
    if(!preg_match("#[A-Z]+#", $password)){
   $error .= "Password must have at least one capital letter <br>";
}
  if(!preg_match("#[0-9]+#", $password)){ 
   $error .= "Password must have atleast one number <br>";
}
    if(!preg_match("#[+&@]+#", $password)){
   $error .= "Password must have any of this symbols: +,&,@ <br>";
}
  if(strpos($password, ' ')){
    $error .= "Password must NOT have any space character <br>";
}
      if($error){
     $message = $error;
      }else{
     $message = "Your Password is Strong!!"; 
  }
   return $message;
}
?>

ọmọ_τó_dùn:

Javascript

function isStrongPassword(password) {
   var m = "", i,
   regex = [
      [/[a-z]+/, 'at least one lowercase alphabet'],
      [/[A-Z]+/, 'at least one uppercase alphabet'],
      [/[+&@]+/, "at least one of the characters '+', '&', and '@'"],
      [/[0-9]+/, 'at least one decimal'],
      [/^[^\s]+$/, 'no space character']
   ]

   for (i in regex)
      if (!regex[i][0].test(password))
         m += 'Must contain ' + regex[i][1] + ".\n";

   m == "" ? alert ('Your password is strong.') : alert (m);
}

pc guru:

mehn got to admit i love the way you simplified it,I was already thinking of something too complicated, nice one bro

<?php

interface IPasswordChecker {
	
	function check($password);
}

class UppercasePasswordCheck implements IPasswordChecker {
	public function check($password){
		if(!preg_match("/[A-Z]+/", $password)){
	    	return "Your password must have at least one capital letter";
		}
	}
}

class LowercasePasswordCheck implements IPasswordChecker {
	public function check($password){
		if(!preg_match("/[a-z]+/", $password)){
	    	return "Password must have at least one small letter";
		}
	}
}

class NumericPasswordCheck implements IPasswordChecker {
	public function check($password){
		if(!preg_match("/[0-9]+/", $password)){
	    	return "Password must have at least one number";
		}
	}
}

class SymbolPasswordCheck implements IPasswordChecker {
	public function check($password){
		if(!preg_match("/[+&@]+/", $password)){
   		 return "Password must have any of this symbols: +,&,@";
		}
	}
}

class SpacePasswordCheck implements IPasswordChecker {
	public function check($password){
		if(strpos($password, ' ')){
    		return "Password must NOT have any space character";
		}
	}
}

class StrongPasswordChecker implements IPasswordChecker {
	
	private $checks = array();


	function __construct() {
		$this->checks[] = new UppercasePasswordCheck();
		$this->checks[] = new LowercasePasswordCheck();
		$this->checks[] = new SpacePasswordCheck();
		$this->checks[] = new SymbolPasswordCheck();
		$this->checks[] = new NumericPasswordCheck();

	}
	public function check($password) {
		$error = "";
		foreach($this->checks as $key => $check){
			$error .= !($result=$check->check($password))  ? "" : $result. "<br />";
		}
		return $error;
	}
}

$Checker = new StrongPasswordChecker();
echo $Checker->check("Pyjac";