how to encrypt and decrypt characters using hashing in PHP

Question

Hi am using hashing for my project. I was created encryption correctly that code is following:

<?php 
function cryptPass($input, $rounds = 9) {
    $salt = "";
    $saltChars = array_merge(range('A','Z'), range('a','z'), range('0','1'));
    for($i = 0; $i < 22; $i++)
    {
        $salt .=$saltChars[array_rand($saltChars)];
    }
    return crypt($input, sprintf('$2y$%02d$', $rounds). $salt);
}
$pass = "passsword";
$hasedpass = cryptPass($pass);
echo $hasedpass;
echo '<br>';
?>

My result is: $2y$09$HICRjrIyBYXWqcqRFC1dDOXF9tTtKZeOTBewebsooxHtWvvepqrnu

Now my question is how to decrypt $hasedpass. I mean the result will be come password $pass values.

From the [docs](http://php.net/manual/en/function.crypt.php): “ There is no decrypt function, since crypt() uses a one-way algorithm”. — fusion3k, Feb 27 '16 at 14:10
ya ok you are right ,but if am using login script means how can i declare `$hasedpass` same from database values — Ramesh S, Feb 27 '16 at 14:14
With your own function, I don't know. Generally, you can use [`hash_equals()`](http://php.net/manual/en/function.hash-equals.php). See also [php passwords FAQ](http://php.net/manual/en/faq.passwords.php) — fusion3k, Feb 27 '16 at 14:29
You have to store the salt if you want to compare the password + hash to the crypted password later. — A.L, Feb 27 '16 at 14:34

score 3 · Answer 1 · answered Feb 27 '16 at 14:09

From the documentation:

crypt — One-way string hashing

You can't decrypt a one-way hash. That is the point of using a one-way hash.

If you want to find out if a password is correct then take the submitted password, crypt it with the same salt, then compare the result to the stored, hashed version.

how to encrypt and decrypt characters using hashing in PHP

1 Answers1