rasn1.rb in rasn1-0.12.1

- old
+ new
@@ -3,40 +3,41 @@
 require_relative 'rasn1/version'
 require_relative 'rasn1/errors'
 require_relative 'rasn1/types'
 require_relative 'rasn1/model'
 require_relative 'rasn1/wrapper'
+require_relative 'rasn1/tracer'
 
 # Rasn1 is a pure ruby library to parse, decode and encode ASN.1 data.
 # @author Sylvain Daubert
 module RASN1
+  # @private
+  CONTAINER_CLASSES = [Types::Sequence, Types::Set].freeze
+
   # Parse a DER/BER string without checking a model
   # @note If you want to check ASN.1 grammary, you should define a {Model}
   #       and use {Model#parse}.
   # @note This method will never decode SEQUENCE OF or SET OF objects, as these
   #       ones use the same encoding as SEQUENCE and SET, respectively.
   # @note Real type of tagged value cannot be guessed. So, such tag will
   #       generate {Types::Base} objects.
   # @param [String] der binary string to parse
   # @param [Boolean] ber if +true+, decode a BER string, else a DER one
   # @return [Types::Base]
-  def self.parse(der, ber: false)
-    root = nil
-    until der.empty?
-      type = Types.id2type(der)
-      type.parse!(der, ber: ber)
-      root ||= type
+  def self.parse(der, ber: false) # rubocop:disable Metrics:AbcSize
+    type = Types.id2type(der)
+    type.parse!(der, ber: ber)
 
-      if [Types::Sequence, Types::Set].include? type.class
-        subder = type.value
-        ary = []
-        until subder.empty?
-          ary << self.parse(subder)
-          subder = subder[ary.last.to_der.size..-1]
-        end
-        type.value = ary
+    if CONTAINER_CLASSES.include?(type.class)
+      subder = type.value
+      ary = []
+      RASN1.tracer.tracing_level += 1 unless RASN1.tracer.nil?
+      until subder.empty?
+        ary << self.parse(subder)
+        subder = subder[ary.last.to_der.size..-1]
       end
-      der = der[type.to_der.size..-1]
+      RASN1.tracer.tracing_level -= 1 unless RASN1.tracer.nil?
+      type.value = ary
     end
-    root
+    type
   end
 end