require 'acceptance_spec_helper'

RSpec.describe 'Postgres sessions and postgres modules' do
  include_context 'wait_for_expect'

  TESTS = {
    postgres: {
      target: {
        session_module: "auxiliary/scanner/postgres/postgres_login",
        type: 'PostgreSQL',
        platforms: [:linux, :osx, :windows],
        datastore: {
          global: {},
          module: {
            username: ENV.fetch('POSTGRES_USERNAME', 'postgres'),
            password: ENV.fetch('POSTGRES_PASSWORD', 'password'),
            rhost: ENV.fetch('POSTGRES_RHOST', '127.0.0.1'),
            rport: ENV.fetch('POSTGRES_RPORT', '5432'),
          }
        }
      },
      module_tests: [
        {
          name: "post/test/postgres",
          platforms: [:linux, :osx, :windows],
          targets: [:session],
          skipped: false,
        },
        {
          name: "auxiliary/scanner/postgres/postgres_hashdump",
          platforms: [:linux, :osx, :windows],
          targets: [:session, :rhost],
          skipped: false,
          lines: {
            all: {
              required: [
                " Username  Hash",
                " --------  ----",
                # postgres  SCRAM-SHA-256$4096:UfTJGaMUW+DtXay1UUD+zA==$0C01mPHaruGTqKJFt5qdITvM+nwLsCgxukO3MIbKugU=:iNBXVE5Vqnoa+dGhmEGMQ0cy+nNXDOzg0F3YNcrtRyE=
                / postgres  \w+/
              ]
            },
          }
        },
        {
          name: "auxiliary/scanner/postgres/postgres_version",
          platforms: [:linux, :osx, :windows],
          targets: [:session, :rhost],
          skipped: false,
          lines: {
            all: {
              required: [
                /Version PostgreSQL \d+.\d+/
              ]
            },
          }
        },
        {
          name: "auxiliary/admin/postgres/postgres_readfile",
          platforms: [:linux],
          targets: [:session, :rhost],
          skipped: false,
          lines: {
            all: {
              # Module reads /etc/passwd by default:
              required: [
                /root:x:\d+:\d+:root:/,
                /postgres:x:\d+:\d+::/
              ]
            },
          }
        },
        {
          name: "auxiliary/admin/postgres/postgres_sql",
          platforms: [:linux, :osx, :windows],
          targets: [:session, :rhost],
          skipped: false,
          lines: {
            all: {
              required: [
                # Default module query
                "Query Text: 'select version()'",
                # Result
                /PostgreSQL \d+.\d+/,
              ]
            },
          }
        }
      ]
    }
  }

  TEST_ENVIRONMENT = AllureRspec.configuration.environment_properties

  let_it_be(:current_platform) { Acceptance::Meterpreter::current_platform }

  # Driver instance, keeps track of all open processes/payloads/etc, so they can be closed cleanly
  let_it_be(:driver) do
    driver = Acceptance::ConsoleDriver.new
    driver
  end

  # Opens a test console with the test loadpath specified
  # @!attribute [r] console
  #   @return [Acceptance::Console]
  let_it_be(:console) do
    console = driver.open_console

    # Load the test modules
    console.sendline('loadpath test/modules')
    console.recvuntil(/Loaded \d+ modules:[^\n]*\n/)
    console.recvuntil(/\d+ auxiliary modules[^\n]*\n/)
    console.recvuntil(/\d+ exploit modules[^\n]*\n/)
    console.recvuntil(/\d+ post modules[^\n]*\n/)
    console.recvuntil(Acceptance::Console.prompt)

    # Read the remaining console
    # console.sendline "quit -y"
    # console.recv_available

    features = %w[
      postgresql_session_type
    ]

    features.each do |feature|
      console.sendline("features set #{feature} true")
      console.recvuntil(Acceptance::Console.prompt)
    end

    console
  end

  # Run the given block in a 'test harness' which will handle all of the boilerplate for asserting module results, cleanup, and artifact tracking
  # This doesn't happen in a before/after block to ensure that allure's report generation is correctly attached to the correct test scope
  def with_test_harness(module_test)
    begin
      replication_commands = []

      known_failures = module_test.dig(:lines, :all, :known_failures) || []
      known_failures += module_test.dig(:lines, current_platform, :known_failures) || []
      known_failures = known_failures.flat_map { |value| Acceptance::LineValidation.new(*Array(value)).flatten }

      required_lines = module_test.dig(:lines, :all, :required) || []
      required_lines += module_test.dig(:lines, current_platform, :required) || []
      required_lines = required_lines.flat_map { |value| Acceptance::LineValidation.new(*Array(value)).flatten }

      yield replication_commands

      # XXX: When debugging failed tests, you can enter into an interactive msfconsole prompt with:
      # console.interact

      # Expect the test module to complete
      module_type = module_test[:name].split('/').first
      test_result = console.recvuntil("#{module_type.capitalize} module execution completed")

      # Ensure there are no failures, and assert tests are complete
      aggregate_failures("#{target.type} target and passes the #{module_test[:name].inspect} tests") do
        # Skip any ignored lines from the validation input
        validated_lines = test_result.lines.reject do |line|
          is_acceptable = known_failures.any? do |acceptable_failure|
            is_matching_line = is_matching_line.value.is_a?(Regexp) ? line.match?(acceptable_failure.value) : line.include?(acceptable_failure.value)
            is_matching_line &&
              acceptable_failure.if?(test_environment)
          end || line.match?(/Passed: \d+; Failed: \d+/)

          is_acceptable
        end

        validated_lines.each do |test_line|
          test_line = Acceptance::Meterpreter.uncolorize(test_line)
          expect(test_line).to_not include('FAILED', '[-] FAILED', '[-] Exception', '[-] '), "Unexpected error: #{test_line}"
        end

        # Assert all expected lines are present
        required_lines.each do |required|
          next unless required.if?(test_environment)
          if required.value.is_a?(Regexp)
            expect(test_result).to match(required.value)
          else
            expect(test_result).to include(required.value)
          end
        end

        # Assert all ignored lines are present, if they are not present - they should be removed from
        # the calling config
        known_failures.each do |acceptable_failure|
          next if acceptable_failure.flaky?(test_environment)
          next unless acceptable_failure.if?(test_environment)

          expect(test_result).to include(acceptable_failure.value)
        end
      end
    rescue RSpec::Expectations::ExpectationNotMetError, StandardError => e
      test_run_error = e
    end

    # Test cleanup. We intentionally omit cleanup from an `after(:each)` to ensure the allure attachments are
    # still generated if the session dies in a weird way etc

    console_reset_error = nil
    current_console_data = console.all_data
    begin
      console.reset
    rescue => e
      console_reset_error = e
      Allure.add_attachment(
        name: 'console.reset failure information',
        source: "Error: #{e.class} - #{e.message}\n#{(e.backtrace || []).join("\n")}",
        type: Allure::ContentType::TXT
      )
    end

    target_configuration_details = target.as_readable_text(
      default_global_datastore: default_global_datastore,
      default_module_datastore: default_module_datastore
    )

    replication_steps = <<~EOF
      ## Load test modules
      loadpath test/modules

      #{target_configuration_details}

      ## Replication commands
      #{replication_commands.empty? ? 'no additional commands run' : replication_commands.join("\n")}
    EOF

    Allure.add_attachment(
      name: 'payload configuration and replication',
      source: replication_steps,
      type: Allure::ContentType::TXT
    )

    Allure.add_attachment(
      name: 'console data',
      source: current_console_data,
      type: Allure::ContentType::TXT
    )

    test_assertions = JSON.pretty_generate(
      {
        required_lines: required_lines.map(&:to_h),
        known_failures: known_failures.map(&:to_h),
      }
    )
    Allure.add_attachment(
      name: 'test assertions',
      source: test_assertions,
      type: Allure::ContentType::TXT
    )

    raise test_run_error if test_run_error
    raise console_reset_error if console_reset_error
  end

  TESTS.each do |runtime_name, test_config|
    runtime_name = "#{runtime_name}#{ENV.fetch('RUNTIME_VERSION', '')}"

    describe "#{Acceptance::Meterpreter.current_platform}/#{runtime_name}", focus: test_config[:focus] do
      test_config[:module_tests].each do |module_test|
        describe(
          module_test[:name],
          if: (
            Acceptance::Meterpreter.supported_platform?(module_test)
          )
        ) do
          let(:target) { Acceptance::Target.new(test_config[:target]) }

          let(:default_global_datastore) do
            {
            }
          end

          let(:test_environment) { TEST_ENVIRONMENT }

          let(:default_module_datastore) do
            {
              lhost: '127.0.0.1'
            }
          end

          # The shared session id that will be reused across the test run
          let(:session_id) do
            console.sendline "use #{target.session_module}"
            console.recvuntil(Acceptance::Console.prompt)

            # Set global options
            console.sendline target.setg_commands(default_global_datastore: default_global_datastore)
            console.recvuntil(Acceptance::Console.prompt)

            console.sendline target.run_command(default_module_datastore: { PASS_FILE: nil, USER_FILE: nil, CreateSession: true })

            session_id = nil
            # Wait for the session to open, or break early if the payload is detected as dead
            wait_for_expect do
              session_opened_matcher = /#{target.type} session (\d+) opened[^\n]*\n/
              session_message = ''
              begin
                session_message = console.recvuntil(session_opened_matcher, timeout: 1)
              rescue Acceptance::ChildProcessRecvError
                # noop
              end

              session_id = session_message[session_opened_matcher, 1]
              expect(session_id).to_not be_nil
            end

            session_id
          end

          before :each do |example|
            next unless example.respond_to?(:parameter)

            # Add the test environment metadata to the rspec example instance - so it appears in the final allure report UI
            test_environment.each do |key, value|
              example.parameter(key, value)
            end
          end

          after :all do
            driver.close_payloads
            console.reset
          end

          context "when targeting a session", if: module_test[:targets].include?(:session) do
            it(
              "#{Acceptance::Meterpreter.current_platform}/#{runtime_name} session opens and passes the #{module_test[:name].inspect} tests"
            ) do
              with_test_harness(module_test) do |replication_commands|
                # 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
                expect(session_id).to_not(be_nil, proc do
                  "There should be a session present"
                end)

                use_module = "use #{module_test[:name]}"
                run_module = "run session=#{session_id} Verbose=true"

                replication_commands << use_module
                console.sendline(use_module)
                console.recvuntil(Acceptance::Console.prompt)

                replication_commands << run_module
                console.sendline(run_module)

                # Assertions will happen after this block ends
              end
            end
          end

          context "when targeting an rhost", if: module_test[:targets].include?(:rhost) do
            it(
              "#{Acceptance::Meterpreter.current_platform}/#{runtime_name} rhost opens and passes the #{module_test[:name].inspect} tests"
            ) do
              with_test_harness(module_test) do |replication_commands|
                use_module = "use #{module_test[:name]}"
                run_module = "run #{target.datastore_options(default_module_datastore: default_module_datastore)} Verbose=true"

                replication_commands << use_module
                console.sendline(use_module)
                console.recvuntil(Acceptance::Console.prompt)

                replication_commands << run_module
                console.sendline(run_module)

                # Assertions will happen after this block ends
              end
            end
          end
        end
      end
    end
  end
end