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.



12
13
14
15
16
17
18
 
# 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 



58
59
60
 
# 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 



20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# 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