Module: RubySMB::Dcerpc::Drsr::AttrtypRequestPlugin

Included in:

DrsMsgGetchgreqV3, DrsMsgGetchgreqV7, DrsMsgGetchgreqV8

Defined in:

lib/ruby_smb/dcerpc/drsr.rb

Instance Method Summary

• #add_attrtyp_from_oid(oid, to_field: :p_partial_attr_set) ⇒ Object

  5.16.4 ATTRTYP-to-OID Conversion.

Instance Method Details

#add_attrtyp_from_oid(oid, to_field: :p_partial_attr_set) ⇒ Object

5.16.4 ATTRTYP-to-OID Conversion

# File 'lib/ruby_smb/dcerpc/drsr.rb', line 264

def add_attrtyp_from_oid(oid, to_field: :p_partial_attr_set)
  last_value = oid.split('.').last.to_i
  binary_oid = OpenSSL::ASN1::ObjectId.new(oid).to_der[2..-1]
  if last_value < 128
    oid_prefix = binary_oid[0...-1].bytes
  else
    oid_prefix = binary_oid[0...-2].bytes
  end

  prefix_table = self.prefix_table_dest.p_prefix_entry
  prefix_table.instantiate_referent if prefix_table.is_null_ptr?
  pos = prefix_table.size
  index = prefix_table.to_ary.index { |e| e.prefix.elements == oid_prefix }
  if index
    pos = index
  else
    entry = PrefixTableEntry.new(ndx: pos)
    entry.prefix.elements = oid_prefix
    prefix_table << entry
  end

  lower_word = last_value % 0x4000
  # mark it so that it is known to not be the whole lastValue
  lower_word += 0x8000 if last_value >= 0x4000
  upper_word = pos
  attrtyp = (upper_word << 16) + lower_word
  attr_set_field = send(to_field)
  attr_set_field.instantiate_referent if attr_set_field.is_null_ptr?
  attr_set_field.rg_partial_attr << attrtyp
end