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Guard against 0-length values

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This commit is contained in:
Anton Thomasson 2022-06-04 14:44:26 +02:00
parent 8c6344eef8
commit 64a7b0120f
1 changed files with 41 additions and 19 deletions
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60
src/ippmsg.cpp
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@ -76,40 +76,63 @@ QJsonValue IppMsg::consume_value(quint8 tag, Bytestream& data)
Q_ASSERT(false);
case Integer:
case Enum:
quint32 tmp_u32;
data >> tmp_len >> tmp_u32;
{
quint32 tmp_u32=0;
if(!(data >>= (quint16)0))
{
data >> (quint16)4 >> tmp_u32;
}
value = (int)tmp_u32;
break;
}
case Boolean:
quint8 tmp_bool;
data >> tmp_len >> tmp_bool;
{
quint8 tmp_bool=0;
if(!(data >>= (quint16)0))
{
data >> (quint16)1 >> tmp_bool;
}
value = (bool)tmp_bool;
break;
}
case DateTime:
{
quint16 year;
quint8 month, day, hour, minutes, seconds, deci_seconds,
plus_minus, utc_h_offset, utc_m_offset;
data >> tmp_len >> year >> month >> day >> hour >> minutes >> seconds >> deci_seconds
>> plus_minus >> utc_h_offset >> utc_m_offset;
QDate date(year, month, day);
QTime time(hour, minutes, seconds, deci_seconds*100);
int offset_seconds = (plus_minus == '+' ? 1 : -1)*(utc_h_offset*60*60+utc_m_offset*60);
value = QDateTime(date, time, Qt::OffsetFromUTC, offset_seconds).toString(Qt::ISODate);
QDateTime tmp_datetime;
if(!(data >>= (quint16)0))
{
quint16 year;
quint8 month, day, hour, minutes, seconds, deci_seconds,
plus_minus, utc_h_offset, utc_m_offset;
data >> (quint16)11 >> year >> month >> day >> hour >> minutes >> seconds >> deci_seconds
>> plus_minus >> utc_h_offset >> utc_m_offset;
QDate date(year, month, day);
QTime time(hour, minutes, seconds, deci_seconds*100);
int offset_seconds = (plus_minus == '+' ? 1 : -1)*(utc_h_offset*60*60+utc_m_offset*60);
tmp_datetime = QDateTime(date, time, Qt::OffsetFromUTC, offset_seconds);
}
value = tmp_datetime.toString(Qt::ISODate);
break;
}
case Resolution:
{
qint32 x, y;
qint8 units;
data >> tmp_len >> x >> y >> units;
qint32 x=0;
qint32 y=0;
qint8 units=0;
if(!(data >>= (quint16)0))
{
data >> (quint16)9 >> x >> y >> units;
}
value = QJsonObject {{"x", x}, {"y", y}, {"units", units}};
break;
}
case IntegerRange:
{
qint32 low, high;
data >> tmp_len >> low >> high;
qint32 low=0;
qint32 high=0;
if(!(data >>= (quint16)0))
{
data >> (quint16)8 >> low >> high;
}
value = QJsonObject {{"low", low}, {"high", high}};
break;
}
@ -251,7 +274,6 @@ QString IppMsg::consume_attribute(QJsonObject& attrs, Bytestream& data)
name = tmp_str.c_str();
taggedValue = consume_value(tag, data);
QJsonArray unnamed = get_unnamed_attributes(data);
if(tag == BeginCollection)