tdf#133771: remove encryption data during SaveAs

If document was password protected but during SaveAs it wasn't
selected to use a password we should remove EcnryptionData.

But we should not do this unconditionally: in general case we should
try to keep all encryption metadata.

Change-Id: Id91a88790deccd7377fb5d394b36395d13748c31
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104454
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
(cherry picked from commit dd4670b)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104345
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

Author: bzzzil

sfx2/source/doc/objstor.cxx

@@ -2787,11 +2787,38 @@ bool SfxObjectShell::PreDoSaveAs_Impl(const OUString& rFileName, const OUString&
     // in "SaveAs" title and password will be cleared ( maybe the new itemset contains new values, otherwise they will be empty )
     // #i119366# - As the SID_ENCRYPTIONDATA and SID_PASSWORD are using for setting password together, we need to clear them both.
     // Also, ( maybe the new itemset contains new values, otherwise they will be empty )
-    if (xMergedParams->HasItem( SID_PASSWORD ))
+    if (xMergedParams->HasItem(SID_ENCRYPTIONDATA))
     {
-        xMergedParams->ClearItem( SID_PASSWORD );
-        xMergedParams->ClearItem( SID_ENCRYPTIONDATA );
+        bool bPasswordProtected = true;
+        const SfxUnoAnyItem* pEncryptionDataItem
+            = xMergedParams->GetItem<SfxUnoAnyItem>(SID_ENCRYPTIONDATA, false);
+        if (pEncryptionDataItem)
+        {
+            uno::Sequence<beans::NamedValue> aEncryptionData;
+            pEncryptionDataItem->GetValue() >>= aEncryptionData;
+            for (const auto& rItem : std::as_const(aEncryptionData))
+            {
+                if (rItem.Name == "CryptoType")
+                {
+                    OUString aValue;
+                    rItem.Value >>= aValue;
+                    if (aValue != "StrongEncryptionDataSpace")
+                    {
+                        // This is not just a password protected document. Let's keep encryption data as is.
+                        bPasswordProtected = false;
+                    }
+                    break;
+                }
+            }
+        }
+        if (bPasswordProtected)
+        {
+            // For password protected documents remove encryption data during "Save as..."
+            xMergedParams->ClearItem(SID_PASSWORD);
+            xMergedParams->ClearItem(SID_ENCRYPTIONDATA);
+        }
     }
+
     xMergedParams->ClearItem( SID_DOCINFO_TITLE );
 
     xMergedParams->ClearItem( SID_INPUTSTREAM );