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* lib/rexml/document.rb: limit entity expansion. Thanks, Luka

Browse source 
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
This commit is contained in:
shugo 2008-09-13 02:07:42 +00:00
parent 4c1486d349
commit 66cecf9d03
4 changed files with 98 additions and 0 deletions
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65
test/rexml/test_document.rb Normal file
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require "rexml/document"
require "test/unit"
class REXML::TestDocument < Test::Unit::TestCase
def test_new
doc = REXML::Document.new(<<EOF)
<?xml version="1.0" encoding="UTF-8"?>
<message>Hello world!</message>
EOF
assert_equal("Hello world!", doc.root.children.first.value)
end
XML_WITH_NESTED_ENTITY = <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE member [
<!ENTITY a "&b;&b;&b;&b;&b;&b;&b;&b;&b;&b;">
<!ENTITY b "&c;&c;&c;&c;&c;&c;&c;&c;&c;&c;">
<!ENTITY c "&d;&d;&d;&d;&d;&d;&d;&d;&d;&d;">
<!ENTITY d "&e;&e;&e;&e;&e;&e;&e;&e;&e;&e;">
<!ENTITY e "&f;&f;&f;&f;&f;&f;&f;&f;&f;&f;">
<!ENTITY f "&g;&g;&g;&g;&g;&g;&g;&g;&g;&g;">
<!ENTITY g "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx">
]>
<member>
&a;
</member>
EOF
XML_WITH_4_ENTITY_EXPANSION = <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE member [
<!ENTITY a "a">
<!ENTITY a2 "&a; &a;">
]>
<member>
&a;
&a2;
</member>
EOF
def test_entity_expansion_limit
doc = REXML::Document.new(XML_WITH_NESTED_ENTITY)
assert_raise(RuntimeError) do
doc.root.children.first.value
end
REXML::Document.entity_expansion_limit = 100
assert_equal(100, REXML::Document.entity_expansion_limit)
doc = REXML::Document.new(XML_WITH_NESTED_ENTITY)
assert_raise(RuntimeError) do
doc.root.children.first.value
end
assert_equal(101, doc.entity_expansion_count)
REXML::Document.entity_expansion_limit = 4
doc = REXML::Document.new(XML_WITH_4_ENTITY_EXPANSION)
assert_equal("\na\na a\n", doc.root.children.first.value)
REXML::Document.entity_expansion_limit = 3
doc = REXML::Document.new(XML_WITH_4_ENTITY_EXPANSION)
assert_raise(RuntimeError) do
doc.root.children.first.value
end
ensure
REXML::Document.entity_expansion_limit = 10000
end
end