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require 'acceptance_spec_helper'
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require 'base64'
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RSpec.describe 'CommandShell' do
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  include_context 'wait_for_expect'
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  # Tests to ensure that CMD/Powershell/Linux is consistent across all implementations/operation systems
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  COMMAND_SHELL_PAYLOADS = Acceptance::Session.with_session_name_merged(
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    {
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      powershell: Acceptance::Session::POWERSHELL,
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      cmd: Acceptance::Session::CMD,
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      linux: Acceptance::Session::LINUX
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    }
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  )
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  allure_test_environment = AllureRspec.configuration.environment_properties
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  let_it_be(:current_platform) { Acceptance::Session::current_platform }
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  # @!attribute [r] port_allocator
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  #   @return [Acceptance::PortAllocator]
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  let_it_be(:port_allocator) { Acceptance::PortAllocator.new }
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  # Driver instance, keeps track of all open processes/payloads/etc, so they can be closed cleanly
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  let_it_be(:driver) do
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    driver = Acceptance::ConsoleDriver.new
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    driver
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  end
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  # Opens a test console with the test loadpath specified
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  # @!attribute [r] console
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  #   @return [Acceptance::Console]
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  let_it_be(:console) do
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    console = driver.open_console
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    # Load the test modules
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    console.sendline('loadpath test/modules')
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    console.recvuntil(/Loaded \d+ modules:[^\n]*\n/)
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    console.recvuntil(/\d+ auxiliary modules[^\n]*\n/)
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    console.recvuntil(/\d+ exploit modules[^\n]*\n/)
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    console.recvuntil(/\d+ post modules[^\n]*\n/)
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    console.recvuntil(Acceptance::Console.prompt)
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    # Read the remaining console
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    # console.sendline "quit -y"
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    # console.recv_available
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    console
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  end
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  COMMAND_SHELL_PAYLOADS.each do |command_shell_name, command_shell_config|
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    command_shell_runtime_name = "#{command_shell_name}#{ENV.fetch('COMMAND_SHELL_RUNTIME_VERSION', '')}"
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    describe command_shell_runtime_name, focus: command_shell_config[:focus] do
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      command_shell_config[:payloads].each.with_index do |payload_config, payload_config_index|
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        describe(
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          Acceptance::Session.human_name_for_payload(payload_config).to_s,
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          if: (
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            Acceptance::Session.run_session?(command_shell_config) &&
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              Acceptance::Session.supported_platform?(payload_config)
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          )
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        ) do
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          let(:payload) { Acceptance::Payload.new(payload_config) }
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          class LocalPath
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            attr_reader :path
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            def initialize(path)
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              @path = path
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            end
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          end
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          let(:session_tlv_logging_file) do
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            # LocalPath.new('/tmp/php_session_tlv_log.txt')
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            Acceptance::TempChildProcessFile.new("#{payload.name}_session_tlv_logging", 'txt')
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          end
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          let(:command_shell_logging_file) do
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            # LocalPath.new('/tmp/php_log.txt')
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            Acceptance::TempChildProcessFile.new("#{payload.name}_debug_log", 'txt')
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          end
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          let(:payload_stdout_and_stderr_file) do
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            # LocalPath.new('/tmp/php_log.txt')
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            Acceptance::TempChildProcessFile.new("#{payload.name}_stdout_and_stderr", 'txt')
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          end
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          let(:default_global_datastore) do
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            {
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              SessionTlvLogging: "file:#{session_tlv_logging_file.path}"
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            }
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          end
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          let(:test_environment) { allure_test_environment }
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          let(:default_module_datastore) do
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            {
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              AutoVerifySessionTimeout: ENV['CI'] ? 30 : 10,
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              lport: port_allocator.next,
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              lhost: '127.0.0.1'
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            }
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          end
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          let(:executed_payload) do
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            file = File.open(payload_stdout_and_stderr_file.path, 'w')
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            driver.run_payload(
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              payload,
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              {
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                out: file,
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                err: file
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              }
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            )
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          end
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          # The shared payload process and session instance that will be reused across the test run
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          #
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          let(:payload_process_and_session_id) do
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            console.sendline "use #{payload.name}"
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            console.recvuntil(Acceptance::Console.prompt)
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            # Set global options
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            console.sendline payload.setg_commands(default_global_datastore: default_global_datastore)
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            console.recvuntil(Acceptance::Console.prompt)
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            # Generate the payload
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            console.sendline payload.generate_command(default_module_datastore: default_module_datastore)
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            console.recvuntil(/Writing \d+ bytes[^\n]*\n/)
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            generate_result = console.recvuntil(Acceptance::Console.prompt)
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            expect(generate_result.lines).to_not include(match('generation failed'))
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            wait_for_expect do
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              expect(payload.size).to be > 0
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            end
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            console.sendline payload.handler_command(default_module_datastore: default_module_datastore)
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            console.recvuntil(/Started reverse TCP handler[^\n]*\n/)
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            payload_process = executed_payload
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            session_id = nil
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            # Wait for the session to open, or break early if the payload is detected as dead
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            larger_retry_count_for_powershell = 600
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            wait_for_expect(larger_retry_count_for_powershell) do
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              unless payload_process.alive?
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                break
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              end
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              session_opened_matcher = /session (\d+) opened[^\n]*\n/
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              session_message = ''
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              begin
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                session_message = console.recvuntil(session_opened_matcher, timeout: 1)
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              rescue Acceptance::ChildProcessRecvError
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                # noop
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              end
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              session_id = session_message[session_opened_matcher, 1]
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              expect(session_id).to_not be_nil
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            end
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            [payload_process, session_id]
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          end
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          # @param [String] path The file path to read the content of
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          # @return [String] The file contents if found
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          def get_file_attachment_contents(path)
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            return 'none resent' unless File.exist?(path)
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            content = File.binread(path)
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            content.blank? ? 'file created - but empty' : content
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          end
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          before :each do |example|
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            next unless example.respond_to?(:parameter)
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            # Add the test environment metadata to the rspec example instance - so it appears in the final allure report UI
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            test_environment.each do |key, value|
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              example.parameter(key, value)
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            end
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          end
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          after :all do
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            driver.close_payloads
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            console.reset
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          end
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          context "#{Acceptance::Session.current_platform}" do
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            command_shell_config[:module_tests].each do |module_test|
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              describe module_test[:name].to_s, focus: module_test[:focus] do
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                it(
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                  "#{Acceptance::Session.current_platform}/#{command_shell_runtime_name} command shell successfully opens a session for the #{payload_config[:name].inspect} payload and passes the #{module_test[:name].inspect} tests",
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                  if: (
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                    Acceptance::Session.run_session?(command_shell_config) &&
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                      # Run if ENV['SESSION_MODULE_TEST'] = 'post/test/cmd_exec' etc
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                      Acceptance::Session.run_session_module_test?(module_test[:name]) &&
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                      # Only run payloads / tests, if the host machine can run them
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                      Acceptance::Session.supported_platform?(payload_config) &&
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                      Acceptance::Session.supported_platform?(module_test) &&
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                      # Skip tests that are explicitly skipped, or won't pass in the current environment
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                      !Acceptance::Session.skipped_module_test?(module_test, allure_test_environment)
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                  ),
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                  # test metadata - will appear in allure report
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                  module_test: module_test[:name]
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                ) do
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                  begin
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                    replication_commands = []
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                    current_payload_status = ''
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                    known_failures = module_test.dig(:lines, :all, :known_failures) || []
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                    known_failures += module_test.dig(:lines, current_platform, :known_failures) || []
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                    known_failures = known_failures.flat_map { |value| Acceptance::LineValidation.new(*Array(value)).flatten }
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                    required_lines = module_test.dig(:lines, :all, :required) || []
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                    required_lines += module_test.dig(:lines, current_platform, :required) || []
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                    required_lines = required_lines.flat_map { |value| Acceptance::LineValidation.new(*Array(value)).flatten }
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                    # Ensure we have a valid session id; We intentionally omit this from a `before(:each)` to ensure the allure attachments are generated if the session dies
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                    payload_process, session_id = payload_process_and_session_id
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                    expect(payload_process).to(be_alive, proc do
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                      $stderr.puts "Made it inside expect payload_process: #{payload_process}"
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                      $stderr.puts "Is the process alive?: #{payload_process.alive?}"
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                      $stderr.puts "Process wait.thread?: #{payload_process.wait_thread}"
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                      $stderr.puts "We have access to .wait_thread, but do we have access to .wait_thread.value?: #{payload_process.alive?}"
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                      current_payload_status = "Expected Payload process to be running. Instead got: payload process exited with #{payload_process.wait_thread.value} - when running the command #{payload_process.cmd.inspect}"
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                      $stderr.puts "Made it after current_payload_status: #{payload_process}"
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                      $stderr.puts "Is the process alive?: #{payload_process.alive?}"
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                      Allure.add_attachment(
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                        name: 'Failed payload blob',
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                        source: Base64.strict_encode64(File.binread(payload_process.payload_path)),
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                        type: Allure::ContentType::TXT
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                      )
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                      current_payload_status
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                    end)
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                    expect(session_id).to_not(be_nil, proc do
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                      "There should be a session present"
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                    end)
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                    use_module = "use #{module_test[:name]}"
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                    run_module = "run session=#{session_id} AddEntropy=true Verbose=true"
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                    replication_commands << use_module
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                    console.sendline(use_module)
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                    console.recvuntil(Acceptance::Console.prompt)
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                    replication_commands << run_module
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                    console.sendline(run_module)
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                    # XXX: When debugging failed tests, you can enter into an interactive msfconsole prompt with:
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                    # console.interact
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                    # Expect the test module to complete
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                    test_result = console.recvuntil('Post module execution completed')
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                    # Ensure there are no failures, and assert tests are complete
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                    aggregate_failures("#{payload_config[:name].inspect} payload and passes the #{module_test[:name].inspect} tests") do
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                      # Skip any ignored lines from the validation input
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                      validated_lines = test_result.lines.reject do |line|
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                        is_acceptable = known_failures.any? do |acceptable_failure|
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                          line.include?(acceptable_failure.value) &&
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                            acceptable_failure.if?(test_environment)
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                        end || line.match?(/Passed: \d+; Failed: \d+/)
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                        is_acceptable
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                      end
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                      validated_lines.each do |test_line|
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                        test_line = Acceptance::Session.uncolorize(test_line)
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                        expect(test_line).to_not include('FAILED', '[-] '), "Unexpected error: #{test_line}"
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                      end
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                      # Assert all expected lines are present
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                      required_lines.each do |required|
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                        next unless required.if?(test_environment)
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                        expect(test_result).to include(required.value)
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                      end
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                      # Assert all ignored lines are present, if they are not present - they should be removed from
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                      # the calling config
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                      known_failures.each do |acceptable_failure|
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                        next if acceptable_failure.flaky?(test_environment)
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                        next unless acceptable_failure.if?(test_environment)
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                        expect(test_result).to include(acceptable_failure.value)
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                      end
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                    end
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                  rescue RSpec::Expectations::ExpectationNotMetError, StandardError => e
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                    test_run_error = e
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                  end
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                  # Test cleanup. We intentionally omit cleanup from an `after(:each)` to ensure the allure attachments are
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                  # still generated if the session dies in a weird way etc
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                  # Payload process cleanup / verification
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                  # The payload process wasn't initially marked as dead - let's close it
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                  if payload_process.present? && current_payload_status.blank?
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                    begin
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                      if payload_process.alive?
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                        current_payload_status = "Process still alive after running test suite"
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                        payload_process.close
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                      else
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                        current_payload_status = "Expected Payload process to be running. Instead got: payload process exited with #{payload_process.wait_thread.value} - when running the command #{payload_process.cmd.inspect}"
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                      end
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                    rescue => e
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                      Allure.add_attachment(
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                        name: 'driver.close_payloads failure information',
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                        source: "Error: #{e.class} - #{e.message}\n#{(e.backtrace || []).join("\n")}",
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                        type: Allure::ContentType::TXT
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                      )
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                    end
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                  end
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                  console_reset_error = nil
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                  current_console_data = console.all_data
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                  begin
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                    console.reset
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                  rescue => e
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                    console_reset_error = e
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                    Allure.add_attachment(
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                      name: 'console.reset failure information',
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                      source: "Error: #{e.class} - #{e.message}\n#{(e.backtrace || []).join("\n")}",
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                      type: Allure::ContentType::TXT
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                    )
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                  end
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                  payload_configuration_details = payload.as_readable_text(
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                    default_global_datastore: default_global_datastore,
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                    default_module_datastore: default_module_datastore
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                  )
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                  replication_steps = <<~EOF
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                    ## Load test modules
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                    loadpath test/modules
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                    #{payload_configuration_details}
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                    ## Replication commands
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                    #{replication_commands.empty? ? 'no additional commands run' : replication_commands.join("\n")}
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                  EOF
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                  Allure.add_attachment(
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                    name: 'payload configuration and replication',
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                    source: replication_steps,
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                    type: Allure::ContentType::TXT
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                  )
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                  Allure.add_attachment(
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                    name: 'payload output if available',
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                    source: "Final status:\n#{current_payload_status}\nstdout and stderr:\n#{get_file_attachment_contents(payload_stdout_and_stderr_file.path)}",
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                    type: Allure::ContentType::TXT
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                  )
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                  Allure.add_attachment(
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                    name: 'session tlv logging if available',
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                    source: get_file_attachment_contents(session_tlv_logging_file.path),
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                    type: Allure::ContentType::TXT
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                  )
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                  Allure.add_attachment(
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                    name: 'console data',
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                    source: current_console_data,
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                    type: Allure::ContentType::TXT
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                  )
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                  test_assertions = JSON.pretty_generate(
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                    {
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                      required_lines: required_lines.map(&:to_h),
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                      known_failures: known_failures.map(&:to_h),
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                    }
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                  )
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                  Allure.add_attachment(
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                    name: 'test assertions',
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                    source: test_assertions,
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                    type: Allure::ContentType::TXT
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                  )
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                  raise test_run_error if test_run_error
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                  raise console_reset_error if console_reset_error
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                end
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              end
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            end
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          end
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        end
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      end
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    end
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  end
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end
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