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Code Issues Releases Wiki Activity

Don't interpret word tokens in content streams (fixes #82)

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This commit is contained in:
Jay Berkenbilt 2017-07-26 05:35:34 -04:00
parent 701b518d5c
commit 12db09898e
2 changed files with 8 additions and 5 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2017-07-26 Jay Berkenbilt <ejb@ql.org>
* Don't attempt to interpret syntactic keywords (like R and
endobj) found while parsing content streams.
* Detect infinite loops while resolving objects. This could happen
if something inside an object that had to be resolved during
parsing, such as a stream length, recursively referenced the

10
libqpdf/QPDFObjectHandle.cc
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@ -964,7 +964,11 @@ QPDFObjectHandle::parseInternal(PointerHolder<InputSource> input,
case QPDFTokenizer::tt_word:
{
std::string const& value = token.getValue();
if ((value == "R") && (in_array || in_dictionary) &&
if (content_stream)
{
object = QPDFObjectHandle::newOperator(value);
}
else if ((value == "R") && (in_array || in_dictionary) &&
(olist.size() >= 2) &&
(! olist.at(olist.size() - 1).isIndirect()) &&
(olist.at(olist.size() - 1).isInteger()) &&
@ -996,10 +1000,6 @@ QPDFObjectHandle::parseInternal(PointerHolder<InputSource> input,
input->seek(input->getLastOffset(), SEEK_SET);
empty = true;
}
else if (content_stream)
{
object = QPDFObjectHandle::newOperator(token.getValue());
}
else
{
throw QPDFExc(qpdf_e_damaged_pdf, input->getName(),