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Bug fix: getStreamData should on unfilterable stream (fixes #425)

This commit is contained in:
Jay Berkenbilt 2020-04-08 18:47:29 -04:00
parent 22f7f459e6
commit 4977a7efa5
6 changed files with 48 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2020-04-08 Jay Berkenbilt <ejb@ql.org>
* Bug fix: qpdf 10.0.0 introduced a bug in which
QPDFObjectHandle::getStreamData would return the raw data when
called on an unfilterable stream instead of throwing an exception
like it's supposed to. Fixes #425.
2020-04-07 Jay Berkenbilt <ejb@ql.org>
* Improve pdf-invert-images example to show a pattern of copying

4
libqpdf/QPDF_Stream.cc
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@ -163,7 +163,9 @@ PointerHolder<Buffer>
QPDF_Stream::getStreamData(qpdf_stream_decode_level_e decode_level)
{
Pl_Buffer buf("stream data buffer");
if (! pipeStreamData(&buf, nullptr, 0, decode_level, false, false))
bool filtered;
pipeStreamData(&buf, &filtered, 0, decode_level, false, false);
if (! filtered)
{
throw QPDFExc(qpdf_e_unsupported, qpdf->getFilename(),
"", this->offset,

6
qpdf/qtest/qpdf.test
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@ -954,12 +954,16 @@ foreach (my $i = 1; $i <= 3; ++$i)
show_ntests();
# ----------
$td->notify("--- Stream data ---");
$n_tests += 1;
$n_tests += 2;
$td->runtest("get stream data",
{$td->COMMAND => "test_driver 11 stream-data.pdf"},
{$td->FILE => "test11.out", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
$td->runtest("get stream data fails on jpeg",
{$td->COMMAND => "test_driver 68 jpeg-qstream.pdf"},
{$td->FILE => "test68.out", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
show_ntests();
# ----------

BIN
qpdf/qtest/qpdf/jpeg-qstream.pdf Normal file
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Binary file not shown.

4
qpdf/qtest/qpdf/test68.out Normal file
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@ -0,0 +1,4 @@
get unfilterable stream: jpeg-qstream.pdf (offset 284): getStreamData called on unfilterable stream
filtered stream data okay
raw stream data okay
test 68 done

29
qpdf/test_driver.cc
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@ -2168,6 +2168,35 @@ void runtest(int n, char const* filename1, char const* arg2)
w.setStaticID(true);
w.write();
}
else if (n == 68)
{
QPDFObjectHandle root = pdf.getRoot();
QPDFObjectHandle qstream = root.getKey("/QStream");
try
{
qstream.getStreamData();
std::cout << "oops -- didn't throw" << std::endl;
}
catch (std::exception& e)
{
std::cout << "get unfilterable stream: " << e.what()
<< std::endl;
}
PointerHolder<Buffer> b1 = qstream.getStreamData(qpdf_dl_all);
if ((b1->getSize() > 10) &&
(memcmp(b1->getBuffer(),
"wwwwwwwww", 9) == 0))
{
std::cout << "filtered stream data okay" << std::endl;
}
PointerHolder<Buffer> b2 = qstream.getRawStreamData();
if ((b2->getSize() > 10) &&
(memcmp(b2->getBuffer(),
"\xff\xd8\xff\xe0\x00\x10\x4a\x46\x49\x46", 10) == 0))
{
std::cout << "raw stream data okay" << std::endl;
}
}
else
{
throw std::runtime_error(std::string("invalid test ") +