* lib/rexml/entity.rb: keep the entity size within the limitation.

  reported by Willis Vandevanter <will@silentrobots.com> and
  patched by nahi.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48161 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 16 insertions, 0 deletions

diff --git a/test/rexml/test_entity.rb b/test/rexml/test_entity.rb
index 820e4f2b85..7d16dc83fe 100644
--- a/test/rexml/test_entity.rb
+++ b/test/rexml/test_entity.rb
@@ -123,6 +123,22 @@ module REXMLTests
       end
     end
 
+    def test_entity_string_limit_for_parameter_entity
+      template = '<!DOCTYPE bomb [ <!ENTITY % a "^" > <!ENTITY bomb "$" > ]><root/>'
+      len      = 5120 # 5k per entity
+      template.sub!(/\^/, "B" * len)
+
+      # 10k is OK
+      entities = '%a;' * 2 # 5k entity * 2 = 10k
+      REXML::Document.new(template.sub(/\$/, entities))
+
+      # above 10k explodes
+      entities = '%a;' * 3 # 5k entity * 2 = 15k
+      assert_raises(REXML::ParseException) do
+        REXML::Document.new(template.sub(/\$/, entities))
+      end
+    end
+
     def test_raw
       source = '<!DOCTYPE foo [
 <!ENTITY ent "replace">