Class: Mcp::Auth::WellKnownController

Inherits:
ActionController::Base
  • Object
show all
Defined in:
app/controllers/mcp/auth/well_known_controller.rb

Instance Method Summary collapse

Instance Method Details

#authorization_server ⇒ Object

RFC 8414: OAuth 2.0 Authorization Server Metadata



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# File 'app/controllers/mcp/auth/well_known_controller.rb', line 28

def authorization_server
  supported_scopes = Mcp::Auth::ScopeRegistry.available_scopes.keys

  metadata = {
    issuer: authorization_server_url,
    authorization_endpoint: "#{authorization_server_url}/oauth/authorize",
    token_endpoint: "#{authorization_server_url}/oauth/token",
    registration_endpoint: "#{authorization_server_url}/oauth/register",
    revocation_endpoint: "#{authorization_server_url}/oauth/revoke",
    introspection_endpoint: "#{authorization_server_url}/oauth/introspect",

    # Supported features
    scopes_supported: supported_scopes.uniq,
    response_types_supported: %w[code],
    grant_types_supported: %w[authorization_code refresh_token],
    code_challenge_methods_supported: %w[S256], # PKCE required
    token_endpoint_auth_methods_supported: %w[client_secret_basic client_secret_post none],

    # RFC 8707: Resource Indicators
    resource_parameter_supported: true,

    # OAuth 2.1 features
    authorization_response_iss_parameter_supported: true,
    require_pushed_authorization_requests: false,
    require_signed_request_object: false,

    # Token revocation and introspection
    revocation_endpoint_auth_methods_supported: %w[client_secret_basic client_secret_post none],
    introspection_endpoint_auth_methods_supported: %w[client_secret_basic client_secret_post none]
  }

  render json: metadata, status: :ok, content_type: 'application/json'
end

#jwks ⇒ Object

JWKS endpoint. Returns the active public key as a JWK when the configured signing algorithm is asymmetric (RS256/ES256). HMAC keys are NEVER published — for HS256 this stays an empty key set.



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# File 'app/controllers/mcp/auth/well_known_controller.rb', line 90

def jwks
  jwk = Mcp::Auth::Services::TokenService.signing_jwk_export
  keys = jwk ? [jwk] : []
  render json: { keys: keys }, status: :ok, content_type: 'application/json'
end

#openid_configuration ⇒ Object

OpenID Connect Discovery



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# File 'app/controllers/mcp/auth/well_known_controller.rb', line 63

def openid_configuration
  # Get all registered scopes plus openid, profile, email
  supported_scopes = Mcp::Auth::ScopeRegistry.available_scopes.keys + %w[openid profile email]

  metadata = {
    issuer: authorization_server_url,
    authorization_endpoint: "#{authorization_server_url}/oauth/authorize",
    token_endpoint: "#{authorization_server_url}/oauth/token",
    registration_endpoint: "#{authorization_server_url}/oauth/register",
    jwks_uri: "#{authorization_server_url}/.well-known/jwks.json",
    userinfo_endpoint: "#{authorization_server_url}/oauth/userinfo",

    scopes_supported: supported_scopes.uniq,
    response_types_supported: %w[code],
    grant_types_supported: %w[authorization_code refresh_token],
    code_challenge_methods_supported: %w[S256],
    token_endpoint_auth_methods_supported: %w[client_secret_basic client_secret_post none],
    subject_types_supported: %w[public],
    id_token_signing_alg_values_supported: [Mcp::Auth.configuration&.token_signing_algorithm || 'HS256']
  }

  render json: metadata, status: :ok, content_type: 'application/json'
end

#protected_resource ⇒ Object

RFC 9728: OAuth 2.0 Protected Resource Metadata



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# File 'app/controllers/mcp/auth/well_known_controller.rb', line 11

def protected_resource
  resource_url = canonical_resource_url

  metadata = {
    resource: resource_url,
    authorization_servers: [authorization_server_url],
    scopes_supported: Mcp::Auth::ScopeRegistry.available_scopes.keys,
    bearer_methods_supported: %w[header],
    resource_documentation: mcp_documentation_url,
    resource_parameter_supported: true, # RFC 8707 support
    authorization_response_iss_parameter_supported: true # OAuth 2.1
  }

  render json: metadata, status: :ok, content_type: 'application/json'
end