threadr.lostcave.ddnss.de/threadr/signup/redirect.php

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PHP
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2020-02-19 16:10:06 +01:00
<?php
//permitted chars for password salt
$permitted_chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ&/()[]$:?_';
//generates password salt
function generate_salt($input, $strength = 5) {
$input_length = strlen($input);
$random_string = '';
for($i = 0; $i < $strength; $i++) {
$random_character = $input[random_int(0, $input_length - 1)];
$random_string .= $random_character;
}
return $random_string;
}
$random_salt = generate_salt($permitted_chars);
$password_hash_method = "sha256";
$pdo = new PDO('mysql:host=localhost;dbname=web', 'webstuff', 'Schei// auf Pa$$w0rter!');
//TODO: Add check for existing users
//$query = "SELECT name FROM users WHERE name = :username;"; ← Do NOT use.
//error indicator for later use
$error = false;
$error_message = "";
if ($_POST['username']=='' || $_POST['password']=='' || $_POST['password_confirmation']=='') {
$error = true;
//TODO: Return redirect header, change index to php for handling highlighting of affected boxes
$error_message = "Error: Not all values populated.";
}
if ($_POST['password'] != $_POST['password_confirmation']) {
$error = true;
//TODO: see above
$error_message = "Error: How much does password?"; //Sorry, I *had* to do it.
}
//run only after basic user sanity checks
if (!$error) {
//add user
$statement = $pdo->prepare('INSERT INTO users (name, authentication_string, authentication_salt, authentication_algorithm) VALUES (:name, :authentication_string, :authentication_salt, :authentication_algorithm)');
$result = $statement->execute(array('name' => $_POST['name'], 'authentication_string' => hash($password_hash_method, $_POST['password'] . $random_salt), 'authentication_salt' => $random_salt, 'authentication_algorithm' => $password_hash_method));
if (!$result) {
$error_message = "Error: SQL error.\n" . $statement->queryString . "\n" . $statement->errorInfo()[2];
}
}
//You know, just in case... (To be removed after proper error handling is in place)
echo $error_message;
?>
</form>
</body>
</html>