svx: punish evil-doers who put duplicate properties into custom shapes

LO 4.3.2.2 is evidently able to export an ODF document that violates
XML Well-formedness constraint: Unique Att Spec.

<draw:enhanced-geometry
 draw:mirror-horizontal="false"
 draw:mirror-vertical="false"
 svg:viewBox="0 0 21679 2134682997"
 draw:text-areas="0 0 ?f3 ?f2"
 draw:mirror-vertical="true"
 draw:type="ooxml-rect"
 draw:enhanced-path="M 0 0 L ?f3 0 ?f3 ?f2 0 ?f2 Z N">

Not sure how to reproduce this, but the attributes there are apparently a
serialization of SdrCustomShapeGeometryItem's aPropSeq,
retrieved from a "CustomShapeGeometry" property, so add some input
validation and assertions there.

Change-Id: I91151365b507779a4bdc9cce2057d34f2376f005
(cherry picked from commit 7fcbb29db802acd8c0f32e8ff578ef4b2f82c46b)

1 files changed, 30 insertions, 1 deletions

diff --git a/svx/source/items/customshapeitem.cxx b/svx/source/items/customshapeitem.cxx
index eae790d0cd5f..cb6e1fa7f8f4 100644
--- a/svx/source/items/customshapeitem.cxx
+++ b/svx/source/items/customshapeitem.cxx
@@ -46,7 +46,14 @@ SdrCustomShapeGeometryItem::SdrCustomShapeGeometryItem( const uno::Sequence< bea
     for ( i = 0; i < aPropSeq.getLength(); i++ )
     {
         beans::PropertyValue& rPropVal = aPropSeq[ i ];
-        aPropHashMap[ rPropVal.Name ] = i;
+        std::pair<PropertyHashMap::iterator, bool> const ret(
+                aPropHashMap.insert(std::make_pair(rPropVal.Name, i)));
+        assert(ret.second); // serious bug: duplicate xml attribute exported
+        if (!ret.second)
+        {
+            throw uno::RuntimeException(
+                "CustomShapeGeometry has duplicate property " + rPropVal.Name);
+        }
         if ( rPropVal.Value.getValueType() == ::getCppuType((const ::com::sun::star::uno::Sequence < beans::PropertyValue >*)0) )
         {
             uno::Sequence< beans::PropertyValue >& rPropSeq = *( uno::Sequence< beans::PropertyValue >*)rPropVal.Value.getValue();
@@ -148,6 +155,9 @@ void SdrCustomShapeGeometryItem::SetPropertyValue( const com::sun::star::beans::
     }
     else
     {   // it's a new property
+        assert(aPropSeq.end() == std::find_if(aPropSeq.begin(), aPropSeq.end(),
+            [&rPropVal](beans::PropertyValue const& rVal)
+                { return rVal.Name == rPropVal.Name; } ));
         sal_uInt32 nIndex = aPropSeq.getLength();
         aPropSeq.realloc( nIndex + 1 );
         aPropSeq[ nIndex ] = rPropVal ;
@@ -171,6 +181,9 @@ void SdrCustomShapeGeometryItem::SetPropertyValue( const OUString& rSequenceName
             aValue.Name = rSequenceName;
             aValue.Value = ::com::sun::star::uno::makeAny( aSeq );
 
+            assert(aPropSeq.end() == std::find_if(aPropSeq.begin(), aPropSeq.end(),
+                [&rSequenceName](beans::PropertyValue const& rV)
+                    { return rV.Name == rSequenceName; } ));
             sal_uInt32 nIndex = aPropSeq.getLength();
             aPropSeq.realloc( nIndex + 1 );
             aPropSeq[ nIndex ] = aValue;
@@ -316,7 +329,23 @@ bool SdrCustomShapeGeometryItem::PutValue( const uno::Any& rVal, sal_uInt8 /*nMe
     if ( ! ( rVal >>= aPropSeq ) )
         return false;
     else
+    {
+        for (sal_Int32 i = 0; i < aPropSeq.getLength(); ++i)
+        {
+            for (sal_Int32 j = i+1; j < aPropSeq.getLength(); ++j)
+            {
+                if (aPropSeq[i].Name == aPropSeq[j].Name)
+                {
+                    assert(0); // serious bug: duplicate xml attribute exported
+                    OUString const name(aPropSeq[i].Name);
+                    aPropSeq.realloc(0);
+                    throw uno::RuntimeException(
+                        "CustomShapeGeometry has duplicate property " + name);
+                }
+            }
+        }
         return true;
+    }
 }
 
 SdrCustomShapeReplacementURLItem::SdrCustomShapeReplacementURLItem()