tdf#105844 package: check for unexpected zip entries on loading ...

... ODF wholesome encrypted package.

There can only be "mimetype", "encrypted-package", and files in
"META-INF".

Change-Id: I5eb46ba29a1a62e25af09e189e0a075a871c71c4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160718
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

2 files changed, 13 insertions, 3 deletions

diff --git a/package/source/zippackage/ZipPackage.cxx b/package/source/zippackage/ZipPackage.cxx
index 459b998de79d..8fb6c27876ab 100644
--- a/package/source/zippackage/ZipPackage.cxx
+++ b/package/source/zippackage/ZipPackage.cxx
@@ -452,7 +452,8 @@ void ZipPackage::parseManifest()
         m_xRootFolder->removeByName( sMimetype );
     }
 
-    m_bInconsistent = m_xRootFolder->LookForUnexpectedODF12Streams( std::u16string_view() );
+    m_bInconsistent = m_xRootFolder->LookForUnexpectedODF12Streams(
+        std::u16string_view(), m_xRootFolder->hasByName("encrypted-package"));
 
     bool bODF12AndNewer = ( m_xRootFolder->GetVersion().compareTo( ODFVER_012_TEXT ) >= 0 );
     if ( !m_bForceRecovery && bODF12AndNewer )
diff --git a/package/source/zippackage/ZipPackageFolder.cxx b/package/source/zippackage/ZipPackageFolder.cxx
index 906f36111497..21c71b14cf09 100644
--- a/package/source/zippackage/ZipPackageFolder.cxx
+++ b/package/source/zippackage/ZipPackageFolder.cxx
@@ -70,7 +70,8 @@ ZipPackageFolder::~ZipPackageFolder()
 {
 }
 
-bool ZipPackageFolder::LookForUnexpectedODF12Streams( std::u16string_view aPath )
+bool ZipPackageFolder::LookForUnexpectedODF12Streams(
+        std::u16string_view const aPath, bool const isWholesomeEncryption)
 {
     bool bHasUnexpected = false;
 
@@ -83,10 +84,14 @@ bool ZipPackageFolder::LookForUnexpectedODF12Streams( std::u16string_view aPath
                 // META-INF is not allowed to contain subfolders
                 bHasUnexpected = true;
             }
+            else if (isWholesomeEncryption && rShortName != u"META-INF")
+            {
+                bHasUnexpected = true;
+            }
             else
             {
                 OUString sOwnPath = aPath + rShortName + "/";
-                bHasUnexpected = rInfo.pFolder->LookForUnexpectedODF12Streams( sOwnPath );
+                bHasUnexpected = rInfo.pFolder->LookForUnexpectedODF12Streams(sOwnPath, isWholesomeEncryption);
             }
         }
         else
@@ -102,6 +107,10 @@ bool ZipPackageFolder::LookForUnexpectedODF12Streams( std::u16string_view aPath
 
                 // streams from META-INF with expected names are allowed not to be registered in manifest.xml
             }
+            else if (isWholesomeEncryption && rShortName != "mimetype" && rShortName != "encrypted-package")
+            {
+                bHasUnexpected = true;
+            }
             else if ( !rInfo.pStream->IsFromManifest() )
             {
                 // the stream is not in META-INF and is not registered in manifest.xml,