Class: DerParse::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/derparse/node.rb,
lib/derparse/node/nil.rb,
lib/derparse/node/null.rb,
lib/derparse/node/integer.rb,
lib/derparse/node/sequence.rb,
lib/derparse/node/octet_string.rb

Direct Known Subclasses

Integer, Nil, Null, OctetString, Sequence

Defined Under Namespace

Classes: Integer, Nil, Null, OctetString, Sequence

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(der, depth: 0, offset: 0) ⇒ Node

Returns a new instance of Node.



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# File 'lib/derparse/node.rb', line 17

def initialize(der, depth: 0, offset: 0)
  @depth, @offset = depth, offset
  @tag = @tag_class = @constructed = @tag_length = @data_length = @length_length, @data = nil
  @complete = true

  begin
    r = parse_type(der)
    r = parse_length(r)
    @rest = parse_data(r)
  rescue IncompleteDer
    @complete = false
    @rest = ""
  end
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/derparse/node.rb', line 15

def data
  @data
end

#data_length ⇒ Object (readonly)

Returns the value of attribute data_length.



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# File 'lib/derparse/node.rb', line 15

def data_length
  @data_length
end

#depth ⇒ Object (readonly)

Returns the value of attribute depth.



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# File 'lib/derparse/node.rb', line 15

def depth
  @depth
end

#length_length ⇒ Object (readonly)

Returns the value of attribute length_length.



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# File 'lib/derparse/node.rb', line 15

def length_length
  @length_length
end

#offset ⇒ Object (readonly)

Returns the value of attribute offset.



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# File 'lib/derparse/node.rb', line 15

def offset
  @offset
end

#rest ⇒ Object (readonly)

Returns the value of attribute rest.



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# File 'lib/derparse/node.rb', line 15

def rest
  @rest
end

#tag ⇒ Object (readonly)

Returns the value of attribute tag.



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# File 'lib/derparse/node.rb', line 15

def tag
  @tag
end

#tag_class ⇒ Object (readonly)

Returns the value of attribute tag_class.



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# File 'lib/derparse/node.rb', line 15

def tag_class
  @tag_class
end

#tag_length ⇒ Object (readonly)

Returns the value of attribute tag_length.



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# File 'lib/derparse/node.rb', line 15

def tag_length
  @tag_length
end

Class Method Details

.factory(der, *args) ⇒ Object 



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# File 'lib/derparse/node.rb', line 5

def self.factory(der, *args)
  klass_name = DerParse::Node.constants.find do |const|
    DerParse::Node.const_get(const).handles?(der)
  end

  klass = klass_name.nil? ? DerParse::Node : const_get(klass_name)

  klass.new(der, *args)
end

Instance Method Details

#complete? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/derparse/node.rb', line 56

def complete?
  @complete
end

#constructed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/derparse/node.rb', line 48

def constructed?
  @constructed
end

#der_length ⇒ Object 



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# File 'lib/derparse/node.rb', line 32

def der_length
  if data_length.nil? || header_length.nil?
    nil
  else
    data_length + header_length
  end
end

#first_child ⇒ Object 



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# File 'lib/derparse/node.rb', line 68

def first_child
  DerParse::Node::Nil.new
end

#header_length ⇒ Object 



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# File 'lib/derparse/node.rb', line 40

def header_length
  if tag_length.nil? || length_length.nil?
    nil
  else
    tag_length + length_length
  end
end

#next_node ⇒ Object 



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# File 'lib/derparse/node.rb', line 60

def next_node
  if @rest.empty?
    DerParse::Node::Nil.new
  else
    DerParse::Node.factory(@rest)
  end
end

#primitive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/derparse/node.rb', line 52

def primitive?
  !constructed?
end

#value ⇒ Object

Raises:



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# File 'lib/derparse/node.rb', line 72

def value
  raise IncompatibleDatatypeError, "No known way to render tag #{@tag} into a value"
end