Class: Legion::Identity::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/legion/identity/middleware.rb

Constant Summary collapse

SKIP_PATHS = 
%w[/api/health /api/ready /api/openapi.json /metrics].freeze
LOOPBACK_BINDS = 
%w[127.0.0.1 ::1 localhost].freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, require_auth: false) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/legion/identity/middleware.rb', line 9

def initialize(app, require_auth: false)
  @app          = app
  @require_auth = require_auth
end

Class Method Details

.require_auth?(bind:, mode:) ⇒ Boolean

Returns whether the API should require authentication. Skips auth for lite mode and loopback binds (local dev / CI).

Returns:

  • (Boolean) 


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# File 'lib/legion/identity/middleware.rb', line 60

def self.require_auth?(bind:, mode:)
  return false if mode == :lite
  return false if LOOPBACK_BINDS.include?(bind)

  true
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/legion/identity/middleware.rb', line 14

def call(env)
  return @app.call(env) if skip_path?(env['PATH_INFO'])

  # Bridge from existing auth middleware
  auth_claims  = env['legion.auth']
  auth_method  = env['legion.auth_method']

  request = if auth_claims
              build_request(auth_claims, auth_method)
            elsif @require_auth
              # Auth middleware already handled 401 for protected paths;
              # this is a safety net for any path that slipped through.
              nil
            else
              # No auth required (loopback bind, lite mode, etc.).
              # Set a system-level principal so audit trails always have an identity.
              system_principal
            end

  env['legion.principal'] = request

  # Bridge to RBAC principal if legion-rbac is loaded.
  # This is a data bridge — set regardless of enforce/audit mode so
  # the RBAC middleware always has a typed principal to evaluate.
  # Guard: require Legion::Rbac.enabled? to confirm the real gem is loaded
  # (not a minimal test stub), and rescue construction errors defensively.
  if request && defined?(Legion::Rbac::Principal) &&
     defined?(Legion::Rbac) && Legion::Rbac.respond_to?(:enabled?) &&
     Legion::Rbac.enabled?
    begin
      env['legion.rbac_principal'] = Legion::Rbac::Principal.new(
        id:    request.principal_id,
        type:  request.kind == :service ? :worker : request.kind,
        roles: request.roles,
        team:  request.metadata&.dig(:team)
      )
    rescue StandardError
      # Best-effort bridge: leave legion.rbac_principal unset on construction errors.
    end
  end

  @app.call(env)
end