Class: DerParse

Inherits:
Object
  • Object
show all
Defined in:
lib/derparse.rb,
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

Defined Under Namespace

Classes: Bug, Error, IncompatibleDatatypeError, Node

Instance Method Summary collapse

Constructor Details

#initialize(s) ⇒ DerParse

Returns a new instance of DerParse.



7
8
9
10
11
12
13
14
 
# File 'lib/derparse.rb', line 7

def initialize(s)
  if s.respond_to?(:to_str)
    @s = s.to_str.dup.force_encoding("BINARY")
  else
    raise ArgumentError,
          "Must provide string to parse"
  end
end

Instance Method Details

#first_node ⇒ Object 



63
64
65
 
# File 'lib/derparse.rb', line 63

def first_node
  node(@s, 0, 0) { |n| return n }
end

#resync(tag, strict: true) ⇒ Object 



37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
# File 'lib/derparse.rb', line 37

def resync(tag, strict: true)
  i = @s.index(tag)

  until i.nil?
    n = DerParse::Node.factory(@s[i..], offset: i)

    if n.complete?
      if !strict || n.next_node.nil?
        return n
      else
        nn = n.next_node
        while nn.complete? && !nn.next_node.nil?
          nn = nn.next_node
        end
        if nn.complete?
          return n
        end
      end
    end

    i = (ni = @s[i+1..].index(tag)) ? ni + i + 1: nil
  end

  DerParse::Node::Nil.new
end

#to_a ⇒ Object 



25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/derparse.rb', line 25

def to_a
  [].tap do |v|
    r = @s

    until r.empty?
      n = DerParse::Node.factory(r)
      v << n.value
      r = n.rest
    end
  end
end

#traverse(&blk) ⇒ Object 



16
17
18
19
20
21
22
23
 
# File 'lib/derparse.rb', line 16

def traverse(&blk)
  if blk
    node(@s, 0, 0, &blk)
    self
  else
    to_enum(:traverse)
  end
end