2020-01-03 15:28:17 +01:00
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<?php
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2020-02-14 21:04:35 +01:00
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$permitted_chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ&/()[]$:?_';
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2020-01-03 15:28:17 +01:00
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function generate_salt($input, $strength = 5) {
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$input_length = strlen($input);
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$random_string = '';
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for($i = 0; $i < $strength; $i++) {
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$random_character = $input[random_int(0, $input_length - 1)];
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$random_string .= $random_character;
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}
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return $random_string;
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}
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$random_salt = generate_salt($permitted_chars);
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2020-01-03 16:55:04 +01:00
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$password_hash_method = "sha256";
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2020-01-03 15:28:17 +01:00
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$pdo = new PDO('mysql:host=localhost;dbname=web', 'webstuff', 'Schei// auf Pa$$w0rter!');
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2020-01-03 16:55:04 +01:00
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$query = "SELECT id, name, authentication_algorithm FROM users;";
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2020-01-03 15:28:17 +01:00
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if (isset($_GET['action'])) {
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if ($_GET['action']=='add') {
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$error = false;
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$error_message = "";
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if ($_POST['name']=='' || $_POST['password']=='' || $_POST['password_confirmation']=='') {
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$error = true;
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$error_message = "<p>Error: Not all values populated.</p>";
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}
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if ($_POST['password'] != $_POST['password_confirmation']) {
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$error = true;
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$error_message = "<p>Error: Password confirmation does not match password.</p>";
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}
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if (!$error) {
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$statement = $pdo->prepare('INSERT INTO users (name, authentication_string, authentication_salt, authentication_algorithm) VALUES (:name, :authentication_string, :authentication_salt, :authentication_algorithm)');
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$result = $statement->execute(array('name' => $_POST['name'], 'authentication_string' => hash($password_hash_method, $_POST['password'] . $random_salt), 'authentication_salt' => $random_salt, 'authentication_algorithm' => $password_hash_method));
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if (!$result) {
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$error_message = "<p>Error: SQL error.</p><pre>" . $statement->queryString . "</pre><pre>" . $statement->errorInfo()[2] . "</pre>";
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}
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}
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}
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}
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?>
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<!DOCTYPE html>
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<html>
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<head>
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<title> LostCave Admin Page </title>
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<meta charset="utf-8" />
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</head>
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<body>
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<h1> Users </h1>
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<table>
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<tr><td>User ID</td><td>Name</td><td>Authentication algorithm</td></tr>
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<?php
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foreach ($pdo->query($query) as $row) {
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echo "<tr><td>".$row['id']."</td><td>".$row['name']."</td><td>".$row['authentication_algorithm']."</td></tr>";
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}
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?>
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</table>
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<h1> Add user </h1>
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<form action="?action=add" method="post">
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<input type="text" maxlength="20" name="name" placeholder="Username" />
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<input type="password" maxlength="256" name="password" placeholder="Password" />
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<input type="password" maxlength="256" name="password_confirmation" placeholder="Repeat password" />
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<input type="submit" value="Add" />
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2020-02-14 21:38:47 +01:00
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<?php
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if (isset($error_message)) {
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echo $error_message;
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}
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2020-02-17 01:56:51 +01:00
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echo "<p>Some server variables...<br />" . json_encode($_SERVER) . "</p>";
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2020-02-14 21:38:47 +01:00
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?>
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2020-01-03 15:28:17 +01:00
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</form>
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</body>
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</html>
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