Class: PhisherPhinder::MailParser::ReceivedHeaders::FromParser

Inherits:
Object
  • Object
show all
Defined in:
lib/phisher_phinder/mail_parser/received_headers/from_parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(ip_factory:, starttls_parser:) ⇒ FromParser 



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# File 'lib/phisher_phinder/mail_parser/received_headers/from_parser.rb', line 7

def initialize(ip_factory:, starttls_parser:)
  @extended_ip_factory = ip_factory
  @starttls_parser = starttls_parser
end

Instance Method Details

#parse(component) ⇒ Object 



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# File 'lib/phisher_phinder/mail_parser/received_headers/from_parser.rb', line 12

def parse(component)
  unless component
    return {
      advertised_authenticated_sender: nil,
      advertised_sender: nil,
      helo: nil,
      sender: {
        host: nil,
        ip: nil
      },
    }.merge(@starttls_parser.parse(nil))
  end

  patterns = [
    %r{
      from\s\[(?<advertised_sender>[\S]+)\]\s
      \((?<sender_host>\S+?)\.?\s
      \[(?<sender_ip>[^\]]+)\]\)\s
      \(Authenticated\ssender:\s(?<advertised_authenticated_sender>[^\)]+)\)
    }x,
    /from\s\[(?<sender_ip>[^\]]+)\]\s\(helo=(?<helo>[^\)]+)\)/,
    %r{
      from\s\[(?<advertised_sender>[\S]+)\]\s
      \((?<sender_host>\S+?)\.?\s
      \[(?<sender_ip>[^\]]+)\]\)
    }x,
    /from\s(?<sender_ip>[^\]]+)\s\(EHLO\s(?<helo>[^\)]+)\)/,
    /from\s(?<advertised_sender>[\S]+)\s\((?<sender_host>\S+?)\.?\s\[(?<sender_ip>[^\]]+)\]\) \((?<starttls>[^\)]+\))/,
    /from\s(?<advertised_sender>[\S]+)\s\((?<sender_host>\S+?)\.?\s\[(?<sender_ip>[^\]]+)\]\) \((?<starttls>[^\)]+\))/,
    /from\s(?<advertised_sender>[\S]+)\s\(HELO\s(?<helo>[^)]+)\)\s\(\)/,
    /from\s(?<advertised_sender>[\S]+)\s\(HELO\s(?<helo>[^)]+)\)\s\(\[(?<sender_ip>[^\]]+)\]\)/,
    /from\s(?<advertised_sender>[\S]+)\s\((?<sender_host>\S+?)\.?\s\[(?<sender_ip>[^\]]+)\]\)/,
    /from\s(?<advertised_sender>\S+)\s\((?<sender_host>\S+?)\.?\s(?<sender_ip>\S+?)\)/,
    /from\s(?<advertised_sender>\S+)\s\(\[(?<sender_ip>[^\]]+)\]\)/,
    /from\s(?<advertised_sender>\S+)\s\((?<sender_ip>[^)]+)\)/,
    /\(from\s(?<advertised_sender>[^)]+)\)/,
    /from\s(?<advertised_sender>\S+)/,
  ]

  matches = patterns.inject(nil) do |memo, pattern|
    memo || component.match(pattern)
  end

  output = {
    advertised_sender: expand_advertised_sender(extract(matches, :advertised_sender)),
    helo: matches.names.include?('helo') ? matches[:helo] : nil,
    sender: {
      host: matches.names.include?('sender_host') ? matches[:sender_host] : nil,
      ip: matches.names.include?('sender_ip') ? @extended_ip_factory.build(matches[:sender_ip]) : nil
    },
    advertised_authenticated_sender: matches.names.include?('advertised_authenticated_sender') ? matches[:advertised_authenticated_sender] : nil
  }

  if matches.names.include?('starttls')
    output.merge(@starttls_parser.parse(matches[:starttls]))
  else
    output.merge(@starttls_parser.parse(nil))
  end
end