# frozen_string_literal: true require 'spec_helper' describe 'rest-client dns rebinding protection' do include StubRequests context 'when local requests are not allowed' do it 'allows an external request with http' do request_stub = stub_full_request('http://example.com', ip_address: '93.184.216.34') RestClient.get('http://example.com/') expect(request_stub).to have_been_requested end it 'allows an external request with https' do request_stub = stub_full_request('https://example.com', ip_address: '93.184.216.34') RestClient.get('https://example.com/') expect(request_stub).to have_been_requested end it 'raises error when it is a request that resolves to a local address' do stub_full_request('https://example.com', ip_address: '172.16.0.0') expect { RestClient.get('https://example.com') } .to raise_error(ArgumentError, "URL 'https://example.com' is blocked: Requests to the local network are not allowed") end it 'raises error when it is a request that resolves to a localhost address' do stub_full_request('https://example.com', ip_address: '127.0.0.1') expect { RestClient.get('https://example.com') } .to raise_error(ArgumentError, "URL 'https://example.com' is blocked: Requests to localhost are not allowed") end it 'raises error when it is a request to local address' do expect { RestClient.get('http://172.16.0.0') } .to raise_error(ArgumentError, "URL 'http://172.16.0.0' is blocked: Requests to the local network are not allowed") end it 'raises error when it is a request to localhost address' do expect { RestClient.get('http://127.0.0.1') } .to raise_error(ArgumentError, "URL 'http://127.0.0.1' is blocked: Requests to localhost are not allowed") end end context 'when port different from URL scheme is used' do it 'allows the request' do request_stub = stub_full_request('https://example.com:8080', ip_address: '93.184.216.34') RestClient.get('https://example.com:8080/') expect(request_stub).to have_been_requested end it 'raises error when it is a request to local address' do expect { RestClient.get('https://172.16.0.0:8080') } .to raise_error(ArgumentError, "URL 'https://172.16.0.0:8080' is blocked: Requests to the local network are not allowed") end it 'raises error when it is a request to localhost address' do expect { RestClient.get('https://127.0.0.1:8080') } .to raise_error(ArgumentError, "URL 'https://127.0.0.1:8080' is blocked: Requests to localhost are not allowed") end end context 'when DNS rebinding protection is disabled' do before do stub_application_setting(dns_rebinding_protection_enabled: false) end it 'allows the request' do request_stub = stub_request(:get, 'https://example.com') RestClient.get('https://example.com/') expect(request_stub).to have_been_requested end end context 'when http(s) proxy environment variable is set' do before do stub_env('https_proxy' => 'https://my.proxy') end it 'allows the request' do request_stub = stub_request(:get, 'https://example.com') RestClient.get('https://example.com/') expect(request_stub).to have_been_requested end end context 'when local requests are allowed' do before do stub_application_setting(allow_local_requests_from_web_hooks_and_services: true) end it 'allows an external request' do request_stub = stub_full_request('https://example.com', ip_address: '93.184.216.34') RestClient.get('https://example.com/') expect(request_stub).to have_been_requested end it 'allows an external request that resolves to a local address' do request_stub = stub_full_request('https://example.com', ip_address: '172.16.0.0') RestClient.get('https://example.com/') expect(request_stub).to have_been_requested end it 'allows an external request that resolves to a localhost address' do request_stub = stub_full_request('https://example.com', ip_address: '127.0.0.1') RestClient.get('https://example.com/') expect(request_stub).to have_been_requested end it 'allows a local address request' do request_stub = stub_request(:get, 'http://172.16.0.0') RestClient.get('http://172.16.0.0') expect(request_stub).to have_been_requested end it 'allows a localhost address request' do request_stub = stub_request(:get, 'http://127.0.0.1') RestClient.get('http://127.0.0.1') expect(request_stub).to have_been_requested end end end