Class: PhisherPhinder::MailParser::ReceivedHeaders::ByParser

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

Instance Method Summary collapse

Constructor Details

#initialize(ip_factory:, starttls_parser:) ⇒ ByParser

Returns a new instance of ByParser.



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

def parse(component)
  unless component
    return {
      recipient: nil,
      protocol: nil,
      id: nil,
      recipient_additional: nil,
      authenticated_as: nil
    }.merge(@starttls_parser.parse(nil))
  end

  patterns = [
    %r{by\s(?<recipient>\S+)\s
     \((?<additional>[^)]+)\)\s
     with\sMicrosoft\sSMTP\sServer\s(?<starttls>\([^\)]+\))\s
     id\s(?<id>\S+)\s
     via\s(?<protocol>Frontend\sTransport)
    }x,
    %r{by\s(?<recipient>\S+)\s
     \((?<additional>[^)]+)\)\s
     with\sMicrosoft\sSMTP\sServer\s(?<starttls>\([^\)]+\))\s
     id\s(?<id>\S+)
    }x,
    /by\s(?<recipient>\S+)\swith\s(?<protocol>\S+)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\s\((?<additional>[^)]+)\)\swith\s(?<protocol>\S+)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\s(?<additional>.+)\swith\s(?<protocol>\S+)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\s\((?<additional>[^)]+)\)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\s\((?<additional>[^)]+)\)\swith\s(?<protocol>.+)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\s\((?<additional>[^)]+)\)\swith\s(?<protocol>\S+)\sID\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\swith\s(?<protocol>.+)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\swith\s(?<protocol>.+)/,
    /by\s(?<recipient>\S+)\s\((?<additional>[^)]+)\)\s\(authenticated as (?<authenticated_as>[^\)]+)\)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)\sid\s(?<id>\S+)/,
    /by\s(?<recipient>\S+)/
  ]

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

  {
    recipient: enrich_recipient(matches[:recipient]),
    protocol: matches.names.include?('protocol') ? matches[:protocol]: nil,
    id: matches.names.include?('id') ? matches[:id]: nil,
    recipient_additional: matches.names.include?('additional') ? matches[:additional] : nil,
    authenticated_as: matches.names.include?('authenticated_as') ? matches[:authenticated_as] : nil,
  }.merge(
    if matches.names.include?('starttls')
      @starttls_parser.parse(matches[:starttls])
    else
      @starttls_parser.parse(nil)
    end
  )
end