Class: RASN1::Types::ObjectId

Inherits:
Primitive show all
Defined in:
lib/rasn1/types/object_id.rb

Overview

ASN.1 Object ID

An OBJECT ID provides unique identifiers.

Object Id are shown as numbered dotted strings, like 0.1.2.1256.1. First number is in range [0-2], the second in range [0-39]. Others are not limited.

Examples:

Object id

oid = RASN1::Types::ObjectId.new(value: "0.2.145.65589.1")
oid.to_der   #=> "\x06\a\x02\x81\x11\x84\x805\x01"

Author:

  • Sylvain Daubert

  • LemonTree55

Constant Summary collapse

ID =

ObjectId id value

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Constants inherited from Primitive

Primitive::ASN1_PC

Constants inherited from Base

Base::CLASSES, Base::CLASS_MASK, Base::INDEFINITE_LENGTH, Base::MULTI_OCTETS_ID

Instance Attribute Summary

Attributes inherited from Base

#asn1_class, #default, #name, #options

Instance Method Summary collapse

Methods inherited from Base

#==, #can_build?, constrained?, #constructed?, #do_parse, #do_parse_explicit, #do_parse_explicit_with_tracing, #do_parse_with_tracing, encoded_type, #explicit?, #id, #implicit?, #initialize, #initialize_copy, #inspect, #optional?, parse, #parse!, #primitive?, #specific_initializer, start_tracing, stop_tracing, #tagged?, #to_der, #trace, #type, type, #value, #value=, #value?, #value_size, #void_value

Constructor Details

This class inherits a constructor from RASN1::Types::Base

Instance Method Details

#der_to_value(der, ber: false) ⇒ void

This method returns an undefined value.

Make object id value from der string

Parameters:

  • der (String)
  • ber (::Boolean) (defaults to: false) 


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# File 'lib/rasn1/types/object_id.rb', line 31

def der_to_value(der, ber: false) # rubocop:disable Lint/UnusedMethodArgument
  bytes = der.unpack('C*')

  ids = []
  current_id = 0
  bytes.each do |byte|
    current_id = (current_id << 7) | (byte & 0x7f)
    if byte.nobits?(0x80)
      ids << current_id
      current_id = 0
    end
  end

  first_id = [2, ids.first / 40].min
  second_id = ids.first - first_id * 40
  ids[0..0] = [first_id, second_id]

  @value = ids.join('.')
end