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comparing security question values

Posted on 2006-07-13
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Last Modified: 2011-08-18
on my login page i ask the member to enter there username,password and answer a simple security question.

but each time i keep getting the error page...


$numbers = array();
      
      $numbers[1] = 'one';
      $numbers[2] = 'two';
      $numbers[3] = 'three';
      $numbers[4] = 'four';
      $numbers[5] = 'five';
      
      $first = array_rand($numbers);
      $second = array_rand($numbers);
      
<form name="loginFrm" method="post" action="'.$_SERVER['PHP_SELF'].'" >
      <input type="hidden" value="'.time().'" name="currenttime">'."\n";
      <input type="hidden" value="'.md5($first+$second+time()).'" name="sum">'."\n";
      Username:<input type="text" name="username">
      Password:<input type="password" name="password">
Security Question:What is '.$numbers[$first].' plus '.$numbers[$second].'? <input type="text" name="answer" size="2" value="">
<input type="submit" value="Login">
</form>


$s_Username .= trim($_POST['username']);
$s_Password .= trim($_POST['password']);
      
$s_Answer .= trim($_POST['answer']);
$s_CurrentTime .= trim($_POST['currenttime']);
      
$s_SumAnswer = md5($s_Answer+$s_CurrentTime);
$s_Sum .= trim($_POST['sum']);
      
if($s_Sum == $s_SumAnswer)
{      
                  //Problems with answer to security question
}
else
{
    // check username and password
    if ok
        login them in
    else
        ///problems
}
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Question by:ellandrd
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7 Comments
 
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Accepted Solution

by:
b0lsc0tt earned 2000 total points
ID: 17104235
ellandrd,

If I understand correctly the problem is occurring when you are trying to match $s_Sum and $s_SumAnswer.  Am I correct that they are not matching?

I think the problem is the sum.  In the form a person has only 2 spaces so would put the number (e.g. 9).  However it looks like your sum would be the two numbers as words concatenated (e.g. fourfive).

Let me know if you have any question or need more information.  If I misunderstood the problem please clarify what the error is and where it occurs.

b0lsc0tt
0
 
LVL 54

Expert Comment

by:b0lsc0tt
ID: 17104262
It looks like a person would go to the section "//Problems with answer to security question" if $s_Sum and $s_sumAnswer are equal.  I assumed that was a typo and that they should go to that section if the variables are NOT equal.  If that is the way your code is then that may also be a problem.
0
 
LVL 16

Author Comment

by:ellandrd
ID: 17104328
>>If I understand correctly the problem is occurring when you are trying to match $s_Sum and $s_SumAnswer.  Am I >>correct that they are not matching?

yes


>>I think the problem is the sum.  In the form a person has only 2 spaces so would put the number (e.g. 9).  However it >>looks like your sum would be the two numbers as words concatenated (e.g. fourfive).

ah ha!  let me change it...


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LVL 16

Author Comment

by:ellandrd
ID: 17104375
still no working...

can you help?
0
 
LVL 54

Expert Comment

by:b0lsc0tt
ID: 17104481
Have you tried to print each variable?  I would also print the type for each variable.  You could use this code and copy it immediately above the If statement.

echo "Sum is " . $s_Sum . "<br>\n";
echo "Type is " . gettype($s_Sum) . "<br>\n";
echo "SumAnswer is " . $s_SumAnswer . "<br>\n";
echo "Type is " . gettype($s_SumAnswer) . "<br>\n";

What are the results?  Just to clarify what is happening, if the 2 variables are equal then it goes to "//Problems" section?  What situation are you testing (i.e. correct answer to security question or incorrect answer) and which part of the If statement are they going to?  Thanks for clarifying that for me.
0
 
LVL 54

Expert Comment

by:b0lsc0tt
ID: 17104494
I guess that the problem is fixed since you have accepted my comment.  Thank you for the grade, the points and the fun question.  If you care to reply I am interested to hear what happened after you replied that it still was not working.

bol
0
 
LVL 16

Author Comment

by:ellandrd
ID: 17104631
oh i had another typo in my variable...

have another here if interested...

http://www.experts-exchange.com/Web/Web_Languages/PHP/Q_21918903.html
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