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概要

Casbin is a powerful and efficient open-source access control library that supports various access control models for enforcing authorization across the board.

Enforcing a set of rules is as simple as listing subjects, objects, and the desired allowed action (or any other format as per your needs) in a policy file. This is synonymous across all flows in which Casbin is used. The developer/administrator has complete control over the layout, execution, and conditions for authorization, which are set via the model file. Casbin provides an Enforcer for validating an incoming request based on the policy and model files given to the Enforcer.

Languages Supported by Casbin

Casbin provides support for various programming languages, ready to be integrated within any project and workflow:

golangjavanodejsphp
CasbinjCasbinnode-CasbinPHP-Casbin
Production-readyProduction-readyProduction-readyProduction-ready
pythondotnetc++rust
PyCasbinCasbin.NETCasbin-CPPCasbin-RS
Production-readyProduction-readyProduction-readyProduction-ready

Feature Set for Different Languages

We are always working our best to make Casbin have the same set of features for all languages. However, the reality is not that beautiful.

機能GoJavaNode.jsPHPPythonC#DelphiRustC++LuaDartElixir
実行
RBAC
ABAC
Scaling ABAC (eval())
Adapter
Management API
RBAC API
Batch API
Filtered Adapter
Watcher
Role Manager
Multi-Threading
'in' of matcher

Note - ✅ for Watcher or Role Manager only means having the interface in the core library. It is not indicative of whether there is a watcher or role manager implementation available.

Casbinとは?

Casbin is an authorization library that can be used in flows where we want a certain object or entity to be accessed by a specific user or subject. The type of access, i.e. action, can be read, write, delete, or any other action as set by the developer. This is how Casbin is most widely used, and it's called the "standard" or classic { subject, object, action } flow.

Casbin is capable of handling many complex authorization scenarios other than the standard flow. There can be the addition of roles (RBAC), attributes (ABAC), etc.

What Casbin Does

  1. Enforce the policy in the classic { subject, object, action } form or a customized form as you defined. Both allow and deny authorizations are supported.
  2. アクセス制御モデルとそのポリシーの保存をハンドリングします
  3. ロール・ユーザー間のマッピングとロール・ロール間のマッピング(RBACのロール階層)を管理します。
  4. Support built-in superusers like root or administrator. スーパーユーザは明示的な権限なしに何でも行うことができます。
  5. Provide multiple built-in operators to support rule matching. For example, keyMatch can map a resource key /foo/bar to the pattern /foo*.

What Casbin Does NOT Do

  1. Authentication (aka verifying username and password when a user logs in)
  2. ユーザーまたはロールのリスト管理。

It's more convenient for projects to manage their lists of users, roles, or passwords. パスワードは通常ユーザが保持しており、Casbinはパスワードを保管するものとして設計されていません。 しかし、CasbinはRBACシナリオのユーザー・ロール間のマッピングについては保存を行います。