Class: Snortor::RulefileCollection

Inherits:
Array
  • Object
show all
Includes:
RuleFinder, RuleLoader
Defined in:
lib/rulefile_collection.rb

Instance Method Summary collapse

Methods included from RuleFinder

#find_all_by_msg, #find_by_msg

Methods included from RuleLoader

#read_rules_from_dir, #read_rules_from_file

Instance Method Details

#<<(a) ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 12

def <<(a)
  raise "only instances of Rulefile allowed" unless a.class == Rulefile
  old_push(a)
end

#[](index) ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 17

def [](index)
  offset = 0
  self.old_each do |rule_file|
    if index < offset+rule_file.size
      return rule_file[index-offset]
      break
    end
    offset += rule_file.size
  end
end

#each(&block) ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 36

def each(&block)
  self.old_each do |rulefile|
    rulefile.each do |rule|
      block.call(rule)
    end
  end
  nil
end

#import_rules(path) ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 45

def import_rules(path)
  rulefile = nil
  if File.directory?(path)
    read_rules_from_dir(path) do |filepath,line|
      if rulefile == nil || rulefile.filepath != filepath
        rulefile = Rulefile.new(filepath)
        rulefile.calc_relative_path(path)
        self << rulefile
      end
      begin
        # only parse lines that seem to be a rule
        # maybe handle includes and comments as well
        if line["alert"]
          if line.strip[0] == "#"
            line[line.index("#")] = ""
            rule = Snort::Rule.parse_rule(line.strip)
            rule.active = false
            rulefile << rule if rule
          else
            rulefile << Snort::Rule.parse_rule(line.strip)
          end
        end
      rescue
        puts "Problem parsing line #{line} in #{filepath}"
      end
    end
  else

    read_rules_from_file(path) do |filepath,line|
      if rulefile == nil || rulefile.filepath != filepath
        rulefile = Rulefile.new(filepath)
        rulefile.calc_relative_path(path)
        self << rulefile
      end
      begin
        # only parse lines that seem to be a rule
        # maybe handle includes and comments as well
        if line["alert"]
          if line.strip[0] == "#"
            line[line.index("#")] = ""
            rule = Snort::Rule.parse_rule(line.strip)
            rule.active = false
            rulefile << rule if rule
          else
            rulefile << Snort::Rule.parse_rule(line.strip)
          end
        end
      rescue
        puts "Problem parsing line #{line} in #{filepath}"
      end
    end
  end
end

#old_each ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 10

alias_method :old_each, :each

#old_push ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 9

alias_method :old_push, :<<

#size ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 28

def size
  res = 0
  self.old_each do |rule_file|
    res += rule_file.size
  end
  res
end

#write_rules(path) ⇒ Object 



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# File 'lib/rulefile_collection.rb', line 99

def write_rules(path)
  Dir.mkdir(path) if !File.exists?(path)
  self.old_each do |rulefile|
    begin
      dest = File.join(path,rulefile.relative_path,rulefile.filename)
      file = File.new(dest,"w")
    rescue Errno::ENOENT
      Dir.mkdir(File.join(path,rulefile.relative_path))
      file = File.new(dest,"w")
    end
    rulefile.each do |rf|
      if rf.active
        file.write(rf.to_line.gsub("\n","")+"\n")
      else
        file.write("# "+rf.to_line.gsub("\n","")+"\n")
      end
    end
    file.close
  end
end