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I want to match the 'pass_string' a.k.a. password from the form versus the password currently inside the databse.
So far this is what I did.

Code:

   public function show_pass_salt()
   {
       $this->load->library('authentication');
       
       $password = 'Retinitis9';
       $random_salt = $this->authentication->random_salt();
       
        $pwd = $this->authentication->hash_passwd($password, $random_salt);
        echo $pwd;
       
   }

Eventhough one of the password in the DB is  'Retinitis9' it did not match one of them.
What's the proper way to match the password from a form versus the current password in the DB.

thanks in advance.

The proper way to check if the password matches a specific user would be to get the user's hashed password and salt from the user's table, and with the password you want to check call the authentication libraries check_passwd method:

PHP Code:

$pwd = 'Retinitis9';

// A user's ID; for example user ID #24
$user_id = 24;

$query = $this->db->select('user_pass,user_salt')
    ->from( config_item('user_table') )
    ->where( 'user_id', $user_id )
    ->get();

if( $query->num_rows() == 1 )
{
    $row = $query->row_array();

    $password_match = $this->authentication->check_passwd(
        $row['user_pass'],
        $row['user_salt'],
        $pwd
    );

    // Bool
    var_dump( $password_match );
} 


If you need to check a bunch of different users to see if the password matches one of theirs, you might do something like this:

PHP Code:

$pwd = 'Retinitis9';

$query = $this->db->select('user_id,user_pass,user_salt')
    ->from( config_item('user_table') )
    ->get();

if( $query->num_rows() > 0 )
{
    foreach( $query->result_array() as $row )
    {
        $password_match = $this->authentication->check_passwd(
            $row['user_pass'],
            $row['user_salt'],
            $pwd
        );

        if( $password_match )
        {
            echo $pwd . ' was the correct password for user #' . $row['user_id'];
            break;
        }
    }
} 


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