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#include <qpdf/QPDFEFStreamObjectHelper.hh>
#include <qpdf/Pipeline_private.hh>
#include <qpdf/Pl_MD5.hh>
#include <qpdf/QIntC.hh>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFObjectHandle_private.hh>
#include <qpdf/QUtil.hh>
using namespace qpdf;
class QPDFEFStreamObjectHelper::Members
{
};
QPDFEFStreamObjectHelper::QPDFEFStreamObjectHelper(QPDFObjectHandle oh) :
QPDFObjectHelper(oh)
{
}
QPDFObjectHandle
QPDFEFStreamObjectHelper::getParam(std::string const& pkey)
{
if (auto result = oh().getDict()["/Params"][pkey]) {
return result;
}
return {};
}
void
QPDFEFStreamObjectHelper::setParam(std::string const& pkey, QPDFObjectHandle const& pval)
{
if (Dictionary Params = oh().getDict()["/Params"]) {
Params.replace(pkey, pval);
return;
}
oh().getDict().replaceKey("/Params", Dictionary({{pkey, pval}}));
}
std::string
QPDFEFStreamObjectHelper::getCreationDate()
{
if (String CreationDate = getParam("/CreationDate")) {
return CreationDate.utf8_value();
}
return {};
}
std::string
QPDFEFStreamObjectHelper::getModDate()
{
if (String ModDate = getParam("/ModDate")) {
return ModDate.utf8_value();
}
return {};
}
size_t
QPDFEFStreamObjectHelper::getSize()
{
if (Integer Size = getParam("/Size")) {
return Size.value<size_t>();
}
return 0;
}
std::string
QPDFEFStreamObjectHelper::getSubtype()
{
if (Name Subtype = oh().getDict()["/Subtype"]) {
if (Subtype.value().size() > 1) {
return Subtype.value().substr(1);
}
}
return {};
}
std::string
QPDFEFStreamObjectHelper::getChecksum()
{
if (String CheckSum = getParam("/CheckSum")) {
return CheckSum.value();
}
return {};
}
QPDFEFStreamObjectHelper
QPDFEFStreamObjectHelper::createEFStream(QPDF& qpdf, std::shared_ptr<Buffer> data)
{
return newFromStream(qpdf.newStream(std::move(data)));
}
QPDFEFStreamObjectHelper
QPDFEFStreamObjectHelper::createEFStream(QPDF& qpdf, std::string const& data)
{
return newFromStream(qpdf.newStream(data));
}
QPDFEFStreamObjectHelper
QPDFEFStreamObjectHelper::createEFStream(QPDF& qpdf, std::function<void(Pipeline*)> provider)
{
auto stream = qpdf.newStream();
stream.replaceStreamData(provider, {}, {});
return newFromStream(stream);
}
QPDFEFStreamObjectHelper&
QPDFEFStreamObjectHelper::setCreationDate(std::string const& date)
{
setParam("/CreationDate", String(date));
return *this;
}
QPDFEFStreamObjectHelper&
QPDFEFStreamObjectHelper::setModDate(std::string const& date)
{
setParam("/ModDate", String(date));
return *this;
}
QPDFEFStreamObjectHelper&
QPDFEFStreamObjectHelper::setSubtype(std::string const& subtype)
{
oh().getDict().replaceKey("/Subtype", Name("/" + subtype));
return *this;
}
QPDFEFStreamObjectHelper
QPDFEFStreamObjectHelper::newFromStream(QPDFObjectHandle stream)
{
QPDFEFStreamObjectHelper result(stream);
stream.getDict().replaceKey("/Type", Name("/EmbeddedFile"));
// The PDF spec specifies use of MD5 here and notes that it is not to be used for security. MD5
// is known to be insecure.
Pl_MD5 md5("EF md5");
pl::Count count(0, &md5);
if (!stream.pipeStreamData(&count, nullptr, 0, qpdf_dl_all)) {
stream.warn("unable to get stream data for new embedded file stream");
} else {
result.setParam("/Size", Integer(count.getCount()));
result.setParam("/CheckSum", String(QUtil::hex_decode(md5.getHexDigest())));
}
return result;
}
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