Class: Simp::BeakerHelpers::SSG

Inherits:
Object
  • Object
show all
Defined in:
lib/simp/beaker_helpers/ssg.rb

Overview

Helpers for working with the SCAP Security Guide

Constant Summary collapse

GIT_REPO = 
'https://github.com/ComplianceAsCode/content.git'
GIT_BRANCH =

If this is not set, the highest numeric tag will be used

ENV['BEAKER_ssg_branch']
EL7_PACKAGES = 
[
  'PyYAML',
  'cmake',
  'git',
  'openscap-python',
  'openscap-scanner',
  'openscap-utils',
  'python-jinja2',
  'python-lxml',
  'python-setuptools'
]
EL8_PACKAGES = 
[
  'cmake',
  'git',
  'make',
  'openscap-python3',
  'openscap-utils',
  'openscap-scanner',
  'python3',
  'python3-jinja2',
  'python3-lxml',
  'python3-pyyaml',
  'python3-setuptools',
  'libarchive'
]
OS_INFO = 
{
  'RedHat' => {
    '6' => {
      'required_packages' => EL7_PACKAGES,
      'ssg' => {
        'profile_target' => 'rhel6',
        'build_target'   => 'rhel6',
        'datastream'     => 'ssg-rhel6-ds.xml'
      }
    },
    '7' => {
      'required_packages' => EL7_PACKAGES,
      'ssg' => {
        'profile_target' => 'rhel7',
        'build_target'   => 'rhel7',
        'datastream'     => 'ssg-rhel7-ds.xml'
      }
    },
    '8' => {
      'required_packages' => EL8_PACKAGES,
      'ssg' => {
        'profile_target' => 'rhel8',
        'build_target'   => 'rhel8',
        'datastream'     => 'ssg-rhel8-ds.xml'
      }
    }
  },
  'CentOS' => {
    '6' => {
      'required_packages' => EL7_PACKAGES,
      'ssg' => {
        'profile_target' => 'rhel6',
        'build_target'   => 'centos6',
        'datastream'     => 'ssg-centos6-ds.xml'
      }
    },
    '7' => {
      'required_packages' => EL7_PACKAGES,
      'ssg' => {
        'profile_target' => 'centos7',
        'build_target'   => 'centos7',
        'datastream'     => 'ssg-centos7-ds.xml'
      }
    },
    '8' => {
      'required_packages' => EL8_PACKAGES,
      'ssg' => {
        'profile_target' => 'centos8',
        'build_target'   => 'centos8',
        'datastream'     => 'ssg-centos8-ds.xml'
      }
    }
  },
  'Rocky' => {
    '8' => {
      'required_packages' => EL8_PACKAGES,
      'ssg' => {
        'profile_target' => 'centos8',
        'build_target'   => 'centos8',
        'datastream'     => 'ssg-centos8-ds.xml'
      }
    }
  },
  'OracleLinux' => {
    '7' => {
      'required_packages' => EL7_PACKAGES,
      'ssg' => {
        'profile_target' => 'ol7',
        'build_target'   => 'ol7',
        'datastream'     => 'ssg-ol7-ds.xml'
      },
    },
    '8' => {
      'required_packages' => EL8_PACKAGES,
      'ssg' => {
        'profile_target' => 'ol8',
        'build_target'   => 'ol8',
        'datastream'     => 'ssg-ol8-ds.xml'
      }
    }
  }
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(sut) ⇒ SSG

Create a new SSG helper for the specified host

Parameters:

  • sut —

    The SUT against which to run



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# File 'lib/simp/beaker_helpers/ssg.rb', line 139

def initialize(sut)
  @sut = sut

  @os = pfact_on(@sut, 'os.name')
  @os_rel = pfact_on(@sut, 'os.release.major')

  sut.mkdir_p('scap_working_dir')

  @scap_working_dir = on(sut, 'cd scap_working_dir && pwd').stdout.strip

  unless OS_INFO[@os]
    fail("Error: The '#{@os}' Operating System is not supported")
  end

  OS_INFO[@os][@os_rel]['required_packages'].each do |pkg|
    install_latest_package_on(@sut, pkg)
  end

  @output_dir = File.absolute_path('sec_results/ssg')

  unless File.directory?(@output_dir)
    FileUtils.mkdir_p(@output_dir)
  end

  @result_file = "#{@sut.hostname}-ssg-#{Time.now.to_i}"

  get_ssg_datastream
end

Instance Attribute Details

#scap_working_dir ⇒ Object

Returns the value of attribute scap_working_dir.



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# File 'lib/simp/beaker_helpers/ssg.rb', line 132

def scap_working_dir
  @scap_working_dir
end

Class Method Details

.process_ssg_results(result_file, filter = nil, exclusions = nil) ⇒ Hash

Process the results of an SSG run

Parameters:

  • result_file (String) —

    The oscap result XML file to process

  • filter (String, Array[String]) (defaults to: nil) —

    A ‘short name’ filter that will be matched against the rule ID name

  • exclusions (String, Array[String]) (defaults to: nil) —

    A ‘short name’ filter of items that will be removed from the ‘filter` matches

Returns:

  • (Hash) —

    A Hash of statistics and a formatted report



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# File 'lib/simp/beaker_helpers/ssg.rb', line 256

def self.process_ssg_results(result_file, filter=nil, exclusions=nil)
  require 'highline'
  require 'nokogiri'

  HighLine.colorize_strings

  fail("Could not find results XML file '#{result_file}'") unless File.exist?(result_file)

  puts "Processing #{result_file}"
  doc = Nokogiri::XML(File.open(result_file))

  # because I'm lazy
  doc.remove_namespaces!

  if filter
    filter = Array(filter)

    xpath_query = [
      '//rule-result[(',
    ]

    xpath_query << filter.map do |flt|
      "contains(@idref,'#{flt}')"
    end.join(' or ')

    xpath_query << ')' if filter.size > 1

    exclusions = Array(exclusions)
    unless exclusions.empty?
      xpath_query << 'and not('

      xpath_query << exclusions.map do |exl|
        "contains(@idref,'#{exl}')"
      end.join(' or ')

      xpath_query << ')' if exclusions.size > 0
    end

    xpath_query << ')]'

    xpath_query = xpath_query.join(' ')

    # XPATH to get the pertinent test results:
    #   Any node named 'rule-result' for which the attribute 'idref'
    #   contains any of the `filter` Strings and does not contain any of the
    #   `exclusions` Strings
    result_nodes = doc.xpath(xpath_query)
  else
    result_nodes = doc.xpath('//rule-result')
  end

  stats = {
    :failed  => [],
    :passed  => [],
    :skipped => [],
    :filter  => filter.nil? ? 'No Filter' : filter,
    :report  => nil,
    :score   => 0
  }

  result_nodes.each do |rule_result|
    # Results are recorded in a child node named 'result'.
    # Within the 'result' node, the actual result string is
    # the content of that node's (only) child node.

    result = rule_result.element_children.at('result')
    result_id = rule_result.attributes['idref'].value.to_s
    result_value = [
      'Title: ' + doc.xpath("//Rule[@id='#{result_id}']/title/text()").first.to_s,
      '  ID: ' + result_id,
    ]

    if result.child.content == 'fail'
      references = {}

      doc.xpath("//Rule[@id='#{result_id}']/reference").each do |ref|
        references[ref['href']] ||= []
        references[ref['href']] << ref.text
      end

      result_value << '  References:'
      references.each_pair do |src, items|
        result_value << "    *  #{src}"
        result_value << "      * #{items.join(', ')}"
      end
      result_value << '  Description: ' + doc.xpath("//Rule[@id='#{result_id}']/description").text.gsub("\n","\n    ")
    end

    result_value = result_value.join("\n")

    if result.child.content == 'fail'
      stats[:failed] << result_value.red
    elsif result.child.content == 'pass'
      stats[:passed] << result_value.green
    else
      stats[:skipped] << result_value.yellow
    end
  end

  report = []

  report << '== Skipped =='
  report << stats[:skipped].join("\n")

  report << '== Passed =='
  report << stats[:passed].join("\n")

  report << '== Failed =='
  report << stats[:failed].join("\n")


  report << 'OSCAP Statistics:'

  if filter
    report << "  * Used Filter: 'idref' ~= '#{stats[:filter]}'"
  end

  report << "  * Passed: #{stats[:passed].count.to_s.green}"
  report << "  * Failed: #{stats[:failed].count.to_s.red}"
  report << "  * Skipped: #{stats[:skipped].count.to_s.yellow}"

  score = 0

  if (stats[:passed].count + stats[:failed].count) > 0
    score = ((stats[:passed].count.to_f/(stats[:passed].count + stats[:failed].count)) * 100.0).round(0)
  end

  report << "\n Score: #{score}%"

  stats[:score]  = score
  stats[:report] = report.join("\n")

  return stats
end

Instance Method Details

#evaluate(profile, remediate = false) ⇒ Object 



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# File 'lib/simp/beaker_helpers/ssg.rb', line 185

def evaluate(profile, remediate=false)
  cmd = "cd #{@scap_working_dir}; oscap xccdf eval"

  if remediate
    cmd += ' --remediate'
  end

  cmd += %( --profile #{profile} --results #{@result_file}.xml --report #{@result_file}.html #{OS_INFO[@os][@os_rel]['ssg']['datastream']})

  # We accept all exit codes here because there have occasionally been
  # failures in the SSG content and we're not testing that.

  on(@sut, cmd, :accept_all_exit_codes => true)

  ['xml', 'html'].each do |ext|
    path = "#{@scap_working_dir}/#{@result_file}.#{ext}"
    scp_from(@sut, path, @output_dir)

    fail("Could not retrieve #{path} from #{@sut}") unless File.exist?(File.join(@output_dir, "#{@result_file}.#{ext}"))
  end
end

#get_profiles ⇒ Object 



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# File 'lib/simp/beaker_helpers/ssg.rb', line 172

def get_profiles
  cmd = "cd #{@scap_working_dir}; oscap info --profiles"
  on(@sut, "#{cmd} #{OS_INFO[@os][@os_rel]['ssg']['datastream']}")
    .stdout
    .strip
    .lines
    .map{|x| x.split(':').first}
end

#process_ssg_results(filter = nil, exclusions = nil) ⇒ Hash

Retrieve a subset of test results based on a match to filter

FIXME:

  • This is a hack! Should be searching for rules based on a set set of STIG ids, but don’t see those ids in the oscap results xml. Further mapping is required…

  • Create the same report structure as inspec

Parameters:

  • filter (String, Array[String]) (defaults to: nil) —

    A ‘short name’ filter that will be matched against the rule ID name

  • exclusions (String, Array[String]) (defaults to: nil) —

    A ‘short name’ filter of items that will be removed from the ‘filter` matches

Returns:

  • (Hash) —

    A Hash of statistics and a formatted report



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# File 'lib/simp/beaker_helpers/ssg.rb', line 234

def process_ssg_results(filter=nil, exclusions=nil)
  self.class.process_ssg_results(
    File.join(@output_dir, @result_file) + '.xml',
    filter,
    exclusions
  )
end

#profile_target ⇒ Object 



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# File 'lib/simp/beaker_helpers/ssg.rb', line 168

def profile_target
  OS_INFO[@os][@os_rel]['ssg']['profile_target']
end

#remediate(profile) ⇒ Object 



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# File 'lib/simp/beaker_helpers/ssg.rb', line 181

def remediate(profile)
  evaluate(profile, true)
end

#write_report(report) ⇒ Object

Output the report

Parameters:

  • report —

    The results Hash



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# File 'lib/simp/beaker_helpers/ssg.rb', line 212

def write_report(report)
  File.open(File.join(@output_dir, @result_file) + '.report', 'w') do |fh|
    fh.puts(report[:report].uncolor)
  end
end