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    Assumes csv file and qr image created by processOPNSense.pl.
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    Assumes csv file and qr image created by processOPNSense.pl.
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    Version 1.0.0 RWR 2025-09-21
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    Version 1.0.0 RWR 2025-09-21
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       Initial Release
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       Initial Release
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    Version 1.1.0 RWR 2025-09-27
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       Added capability of downloading VPN configuration file
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 */
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 */
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// Define the path to the CSV file
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// Define the path to the CSV file
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$csvFile = 'users.csv';
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$csvFile = 'users.csv';
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// Define the path to the .ovpn files, if applicable
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$ovpnDir = 'ovpn_files/';
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$ovpnRegex = 'mcnoc_([a-z0-9]+)\.ovpn';
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$ovpnFileName = '';
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// name of image file
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// name of image file
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$imageFileName = '';
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$imageFileName = '';
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// topt code
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// topt code
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$code = '';
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$code = '';
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function csvToArray( $csvFile, $delimiter = "\t" ) {
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function csvToArray( $csvFile, $delimiter = "\t" ) {
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   // Initialize an array to hold the data
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   // Initialize an array to hold the data
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   $dataArray = [];
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   $dataArray = [];
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   // Open the CSV file for reading
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   // Open the CSV file for reading
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       fclose($handle);
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       fclose($handle);
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   } else {
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   } else {
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       echo "Could not open the CSV file for reading.";
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       echo "Could not open the CSV file for reading.";
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   }
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   }
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   return $dataArray;
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   return $dataArray;
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} // csvToArray
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}
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function ovpnFile ( $path, $username, $ovpnRegex ) {
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   if ( $files = scandir( $path ) ) {
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      foreach ($files as $key => $value ) {
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         if ( preg_match( "/$ovpnRegex/", $value, $matches ) ) {
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            if ( $matches[1] == $username ) {
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               return $path . $matches[0];
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            }
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         }
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      }
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   } else {
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      die( "Error trying to scan directory $path\n" );
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   }
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   return '';
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} // ovpnFile
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// Check if the form is submitted
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// Check if the form is submitted
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if ($_SERVER['REQUEST_METHOD'] == 'POST') {
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if ($_SERVER['REQUEST_METHOD'] == 'POST') {
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    // Get the username and password from the form
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    // Get the username and password from the form
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    $username = $_POST['username'];
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    $username = $_POST['username'];
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          if ( $data['name'] === $username && $data['router'] === $router ) {
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          if ( $data['name'] === $username && $data['router'] === $router ) {
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             if ( password_verify( $password, $data['password'] ) ) {
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             if ( password_verify( $password, $data['password'] ) ) {
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                $code = $data['otp'];
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                $code = $data['otp'];
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                $imageFileName = $data['filename'];
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                $imageFileName = $data['filename'];
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                $isValidUser = true;
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                $isValidUser = true;
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                $ovpnFileName = ovpnFile( $ovpnDir, $data['name'], $ovpnRegex );
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                $log = date("Y-m-d H:i:s") . "\t" . $_SERVER['REMOTE_ADDR'] . "\t" .
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                  "Success\t" . $username."\t" .PHP_EOL;
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                file_put_contents( './log_'.date("j.n.Y").'.log', $log, FILE_APPEND );
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             }
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             }
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             break;
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             break;
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         }
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         }
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      }
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      }
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      if ( ! $isValidUser )
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      if ( ! $isValidUser )
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         echo "<h1>Password wrong, or invalid user $username for router $router</h1>";
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         echo "<h1>Password wrong, or invalid user $username for router $router</h1>";
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    } else {
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    } else {
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        echo '<h1>Could not open the CSV file.</h1>';
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        echo '<h1>Could not open the CSV file.</h1>';
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    }
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    }
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}
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}
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?>
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?>
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<!DOCTYPE html>
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<!DOCTYPE html>
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<html lang="en">
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<html lang="en">
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<head>
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<head>
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    <?php
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    <?php
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       if ( ! empty( $imageFileName ) && ! empty( $code ) ) {
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       if ( ! empty( $imageFileName ) && ! empty( $code ) ) {
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          echo "<div style='text-align: center;'>";
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          echo "<div style='text-align: center;'>";
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          echo "<img src='$imageFileName' alt='$code'>";
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          echo "<img src='$imageFileName' alt='$code'>";
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          echo "<br />Your code for $router is<br /><b>$code</b>";
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          echo "<br />Your code for $router is<br /><b>$code</b>";
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          if ( !empty( $ovpnFileName ) ) {
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             echo "<br /><a href='$ovpnFileName' download>Download your OpenVPN Config File</a>";
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          }
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          echo '</div>';
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          echo '</div>';
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       }
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       }
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    ?>
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    ?>
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    <p>This page is updated hourly. If change your password, it will not be reflected here for an hour</p>
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    <form method="POST" action="">
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    <form method="POST" action="">
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        <label for="username">Username:</label>
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        <label for="username">Username:</label>
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        <input type="text" id="username" name="username" required>
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        <input type="text" id="username" name="username" required>
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        <br>
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        <br>
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        <label for="password">Password:</label>
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        <label for="password">Password:</label>