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client-authentication

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Secure client authentication for OAuth/OIDC.

Software Engineering#security#oauth#jwt#mtls#idp#openid-connect#client-authentication
Authorhirokazu-kobayashi-koba-hiro
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Authenticate client identities at OAuth 2.0 / OpenID Connect token endpoints by supporting multiple client authentication methods.

Core Features & Use Cases

  • Supports 7 client authentication methods: client_secret_basic, client_secret_post, client_secret_jwt, private_key_jwt, tls_client_auth, self_signed_tls_client_auth, none.
  • JWT Assertion validation: validates JWS signatures and ensures correct iss, sub, and aud against the token endpoint and JWKS.
  • mTLS support: validates client certificates against Subject DN or full certificate with flexible matching.
  • Use Case: Deploy on an enterprise IdP to securely authenticate confidential clients during token requests and tenant-specific configurations.

Quick Start

Configure and run the IdP server with the client-authentication module enabled to begin validating token endpoint client credentials.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

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Please help me install this Skill:
Name: client-authentication
Download link: https://github.com/hirokazu-kobayashi-koba-hiro/idp-server/archive/main.zip#client-authentication

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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