ロールベースのアクセス制御 (RBAC) の実装: PHP と RBAC の使用

CREATE TABLE users (
    id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    email VARCHAR(100) NOT NULL UNIQUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE roles (
    id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) UNIQUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE user_roles (
    id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    user_id INT(11) NOT NULL,
    role_id INT(11) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY user_id_fk (user_id) REFERENCES users(id),
    FOREIGN KEY role_id_fk (role_id) REFERENCES roles(id)
);

CREATE TABLE permissions (
    id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) UNIQUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE role_permissions (
    id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    role_id INT(11) NOT NULL,
    permission_id INT(11) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY role_id_fk (role_id) REFERENCES roles(id),
    FOREIGN KEY permission_id_fk (permission_id) REFERENCES permissions(id)
);

class Rbac {

  // 数据库连接和表名
  private $conn;
  private $users_table = "users";
  private $roles_table = "roles";
  private $user_roles_table = "user_roles";
  private $permissions_table = "permissions";
  private $role_permissions_table = "role_permissions";

  // 构造函数将数据库连接
  public function __construct($db) {
    $this->conn = $db;
  }

  // 添加用户
  public function addUser($username, $password, $email) {
    // 生成密码哈希
    $password_hash = password_hash($password, PASSWORD_BCRYPT);
    // 插入用户到数据库
    $query = "INSERT INTO " . $this->users_table . "(username, password, email) VALUES (:username, :password, :email)";
    $stmt = $this->conn->prepare($query);
    $stmt->bindParam(":username", $username);
    $stmt->bindParam(":password", $password_hash);
    $stmt->bindParam(":email", $email);
    if($stmt->execute()) {
      return true;
    } else {
      return false;
    }
  }

  // 添加角色
  public function addRole($name) {
    $query = "INSERT INTO " . $this->roles_table . "(name) VALUES (:name)";
    $stmt = $this->conn->prepare($query);
    $stmt->bindParam(":name", $name);
    if($stmt->execute()) {
      return true;
    } else {
      return false;
    }
  }

  // 添加权限
  public function addPermission($name) {
    $query = "INSERT INTO " . $this->permissions_table . "(name) VALUES (:name)";
    $stmt = $this->conn->prepare($query);
    $stmt->bindParam(":name", $name);
    if($stmt->execute()) {
      return true;
    } else {
      return false;
    }
  }

  // 将用户分配给角色
  public function assignUserRole($user_id, $role_id) {
    $query = "INSERT INTO " . $this->user_roles_table . "(user_id, role_id) VALUES (:user_id, :role_id)";
    $stmt = $this->conn->prepare($query);
    $stmt->bindParam(":user_id", $user_id);
    $stmt->bindParam(":role_id", $role_id);
    if($stmt->execute()) {
      return true;
    } else {
      return false;
    }
  }

  // 将权限分配给角色
  public function assignRolePermission($role_id, $permission_id) {
    $query = "INSERT INTO " . $this->role_permissions_table . "(role_id, permission_id) VALUES (:role_id, :permission_id)";
    $stmt = $this->conn->prepare($query);
    $stmt->bindParam(":role_id", $role_id);
    $stmt->bindParam(":permission_id", $permission_id);
    if($stmt->execute()) {
      return true;
    } else {
      return false;
    }
  }

}

// 包括我们的RBAC类
include_once 'Rbac.php';

// 设置数据库连接
$database = new PDO("mysql:host=localhost;dbname=testdb", "username", "password");

// 定义RBAC类
$rbac = new Rbac($database);

// 添加用户
$rbac->addUser("user1", "password1", "user1@example.com");
$rbac->addUser("user2", "password2", "user2@example.com");

// 添加角色
$rbac->addRole("admin");
$rbac->addRole("editor");
$rbac->addRole("user");

// 添加权限
$rbac->addPermission("create");
$rbac->addPermission("read");
$rbac->addPermission("update");
$rbac->addPermission("delete");

// 将用户分配给角色
$rbac->assignUserRole(1, 1); // user1 is assigned the admin role
$rbac->assignUserRole(1, 3); // user1 is also assigned the user role
$rbac->assignUserRole(2, 2); // user2 is assigned the editor role

// 将权限分配给角色
$rbac->assignRolePermission(1, 1); // admin role is assigned the create permission
$rbac->assignRolePermission(1, 2); // admin role is assigned the read permission
$rbac->assignRolePermission(1, 3); // admin role is assigned the update permission
$rbac->assignRolePermission(1, 4); // admin role is assigned the delete permission
$rbac->assignRolePermission(3, 2); // user role is assigned the read permission

// 提示测试完成
echo "Test complete!";