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Casbin vs OAuth2: What are the differences?

  1. Supported purpose: Casbin is primarily used for access control and permission management in applications, providing fine-grained access control based on authorization rules, while OAuth2 is mainly utilized for delegated authorization, enabling users to grant permissions to specific resources without disclosing their credentials. Casbin focuses on defining and enforcing access control policies, while OAuth2 deals with managing access tokens for resource requests.
  2. Policy management: Casbin centralizes access control policies and enforces them based on policy rules defined by administrators, whereas OAuth2 manages authorization through the exchange of tokens between the resource owner, client, and authorization server, ensuring secure access to protected resources. Casbin's policy management revolves around defining rules for access control, whereas OAuth2's focus is on granting and utilizing access tokens for authorized actions.
  3. Adaptability: Casbin is language-agnostic, making it versatile for integration into various programming languages and frameworks, allowing developers to implement fine-grained access control policies universally, whereas OAuth2 is a standardized authorization framework that mandates specific flows and token formats for authentication and authorization across different platforms and services. Casbin's adaptability makes it easier for developers to implement access control in diverse environments, while OAuth2 ensures consistency in authorization processes across systems.
  4. Granularity of control: Casbin offers fine-grained access control through the use of access control models like RBAC, ABAC, and PBAC, enabling specific authorization for individual actions or resources based on defined policies, while OAuth2 provides broader delegated authorization through the issuance and validation of access tokens, granting broader access rights to clients based on the scopes requested during authorization flows. Casbin's control granularity allows for precise definition of access policies, whereas OAuth2 provides a more general level of authorization based on token scopes.
  5. Authentication vs. Authorization: Casbin primarily focuses on authorization, determining what actions a user is allowed to perform based on defined policies and roles, while OAuth2 focuses on authentication and authorization, ensuring that the user is who they claim to be and granting them access to specific resources based on their permissions. Casbin handles authorization decisions based on access control policies, whereas OAuth2 encompasses both authentication and authorization processes during resource access.
  6. Scope of application: Casbin is typically used within the application codebase to enforce access control policies and manage permissions for users or entities interacting with the system, while OAuth2 is commonly employed as a protocol for securing APIs, enabling third-party applications to access protected resources on behalf of users through token-based authorization. Casbin's application scope is primarily within the application logic for access control, whereas OAuth2's domain extends to secure API access and delegated authorization for external clients.

In Summary, Casbin and OAuth2 differ in their supported purposes, policy management approaches, adaptability, granularity of control, focus on authentication versus authorization, and scope of application in secure access management.

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What is Casbin?

In Casbin, an access control model is abstracted into a CONF file based on the PERM metamodel (Policy, Effect, Request, Matchers). So switching or upgrading the authorization mechanism for a project is just as simple as modifying a configuration. You can customize your own access control model by combining the available models.

What is OAuth2?

It is an authorization framework that enables a third-party application to obtain limited access to an HTTP service, either on behalf of a resource owner by orchestrating an approval interaction between the resource owner and the HTTP service, or by allowing the third-party application to obtain access on its own behalf.

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Sep 29 2020 at 7:36PM

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What are some alternatives to Casbin and OAuth2?
JSON Web Token
JSON Web Token is an open standard that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.
Auth0
A set of unified APIs and tools that instantly enables Single Sign On and user management to all your applications.
Keycloak
It is an Open Source Identity and Access Management For Modern Applications and Services. It adds authentication to applications and secure services with minimum fuss. No need to deal with storing users or authenticating users. It's all available out of the box.
Azure Active Directory
It is a comprehensive identity and access management solution that gives you a robust set of capabilities to manage users and groups. You can get the reliability and scalability you need with identity services that work with your on-premises, cloud, or hybrid environment.
Amazon Cognito
You can create unique identities for your users through a number of public login providers (Amazon, Facebook, and Google) and also support unauthenticated guests. You can save app data locally on users’ devices allowing your applications to work even when the devices are offline.
See all alternatives