Class: Datadog::AppSec::SecurityEngine::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/datadog/appsec/security_engine/runner.rb

Overview

A class that check input via security engine (WAF) and respond with result.

Constant Summary collapse

SUCCESSFUL_EXECUTION_CODES = 
[:ok, :match].freeze

Instance Method Summary collapse

Constructor Details

#initialize(handle, telemetry:) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/datadog/appsec/security_engine/runner.rb', line 12

def initialize(handle, telemetry:)
  @mutex = Mutex.new
  @context = WAF::Context.new(handle)
  @telemetry = telemetry

  @debug_tag = "libddwaf:#{WAF::VERSION::STRING} method:ddwaf_run"
end

Instance Method Details

#finalize ⇒ Object 



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# File 'lib/datadog/appsec/security_engine/runner.rb', line 58

def finalize
  @context.finalize
end

#run(persistent_data, ephemeral_data, timeout = WAF::LibDDWAF::DDWAF_RUN_TIMEOUT) ⇒ Object 



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# File 'lib/datadog/appsec/security_engine/runner.rb', line 20

def run(persistent_data, ephemeral_data, timeout = WAF::LibDDWAF::DDWAF_RUN_TIMEOUT)
  @mutex.lock

  start_ns = Core::Utils::Time.get_time(:nanosecond)
  persistent_data.reject! do |_, v|
    next false if v.is_a?(TrueClass) || v.is_a?(FalseClass)

    v.nil? || v.empty?
  end

  ephemeral_data.reject! do |_, v|
    next false if v.is_a?(TrueClass) || v.is_a?(FalseClass)

    v.nil? || v.empty?
  end

  _code, result = try_run(persistent_data, ephemeral_data, timeout)
  stop_ns = Core::Utils::Time.get_time(:nanosecond)

  report_execution(result)

  unless SUCCESSFUL_EXECUTION_CODES.include?(result.status)
    return Result::Error.new(duration_ext_ns: stop_ns - start_ns)
  end

  klass = (result.status == :match) ? Result::Match : Result::Ok
  klass.new(
    events: result.events,
    actions: result.actions,
    derivatives: result.derivatives,
    timeout: result.timeout,
    duration_ns: result.total_runtime,
    duration_ext_ns: (stop_ns - start_ns)
  )
ensure
  @mutex.unlock
end