Worky

login/authenticate.php

@@ -0,0 +1,66 @@
+<?php
+
+include_once($_SERVER['DOCUMENT_ROOT'] . "/db_config.php");
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+// Get the JSON input
+$data = json_decode(file_get_contents('php://input'), true);
+
+if (is_null($data)) {
+    header('Content-Type: application/json');
+    http_response_code(412);
+    echo '{"success":"false","message":"No body sent."}';
+    return;
+}
+
+$user = $data['username'];
+$pass = $data['password'];
+
+// Input validation and sanitization
+$user = $mysqli->real_escape_string($user);
+
+// Prepare and bind
+$stmt = $mysqli->prepare("SELECT passwordHash FROM users WHERE username = ?");
+$stmt->bind_param("s", $user);
+
+// Execute statement
+$stmt->execute();
+
+// Get result
+$result = $stmt->get_result();
+
+$response = array();
+
+if ($result->num_rows > 0) {
+    $row = $result->fetch_assoc();
+    $hashed_password = $row['passwordHash'];
+    if (password_verify($pass, $hashed_password)) {
+        // Regenerate session ID to prevent session fixation
+        session_regenerate_id(true);
+
+        // Create session
+        $_SESSION['authenticated'] = true;
+        $_SESSION['username'] = $user;
+
+        $response['success'] = true;
+        $response['message'] = 'Login successful!';
+    } else {
+        $response['success'] = false;
+        $response['message'] = 'Invalid username or password.';
+    }
+} else {
+    $response['success'] = false;
+    $response['message'] = 'Invalid username or password.';
+}
+
+// Close connections
+$stmt->close();
+$mysqli->close();
+
+// Return JSON response
+header('Content-Type: application/json');
+echo '{"success":"' . $response['success'] . '","message":"' . $response['message'] . '"' . '}';
+