diff options
| author | shugo <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-09-13 02:07:42 +0000 |
|---|---|---|
| committer | shugo <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-09-13 02:07:42 +0000 |
| commit | 66cecf9d039d0bd3f15385ef5c27adcda2c75c19 (patch) | |
| tree | 718f5dff1d5fbf1db6ebdb95b252b9ee5e0bba4f /lib | |
| parent | 4c1486d34908ef7c6b1af76ef85bad2533192bb0 (diff) | |
* lib/rexml/document.rb: limit entity expansion. Thanks, Luka
Treiber, Mitja Kolsek, and Michael Koziarski. backported from
trunk r19033, r19317, r19318.
* lib/rexml/entity.rb: ditto.
* test/rexml/test_document.rb: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@19320 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/rexml/document.rb | 22 | ||||
| -rw-r--r-- | lib/rexml/entity.rb | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/lib/rexml/document.rb b/lib/rexml/document.rb index 54aa691ad8..11fd0647bf 100644 --- a/lib/rexml/document.rb +++ b/lib/rexml/document.rb @@ -32,6 +32,7 @@ module REXML # @param context if supplied, contains the context of the document; # this should be a Hash. def initialize( source = nil, context = {} ) + @entity_expansion_count = 0 super() @context = context return if source.nil? @@ -200,6 +201,27 @@ module REXML Parsers::StreamParser.new( source, listener ).parse end + @@entity_expansion_limit = 10_000 + + # Set the entity expansion limit. By defualt the limit is set to 10000. + def Document::entity_expansion_limit=( val ) + @@entity_expansion_limit = val + end + + # Get the entity expansion limit. By defualt the limit is set to 10000. + def Document::entity_expansion_limit + return @@entity_expansion_limit + end + + attr_reader :entity_expansion_count + + def record_entity_expansion + @entity_expansion_count += 1 + if @entity_expansion_count > @@entity_expansion_limit + raise "number of entity expansions exceeded, processing aborted." + end + end + private def build( source ) Parsers::TreeParser.new( source, self ).parse diff --git a/lib/rexml/entity.rb b/lib/rexml/entity.rb index ff2d45f39b..94e6d3ff1b 100644 --- a/lib/rexml/entity.rb +++ b/lib/rexml/entity.rb @@ -73,6 +73,7 @@ module REXML # all entities -- both %ent; and &ent; entities. This differs from # +value()+ in that +value+ only replaces %ent; entities. def unnormalized + document.record_entity_expansion v = value() return nil if v.nil? @unnormalized = Text::unnormalize(v, parent) |