package: don't check case insensitive duplicates for ZIP package

Turns out there's a TexMaths extension that contains files with names
differing only in case.

https://ask.libreoffice.org/t/zipexception-when-installing-an-extension/108256

There isn't a separate ZipPackage mode for OXT so just don't check in
the ZIP mode.

Change-Id: I7680c93f5f24ac566a59b131b36d855bd85100b9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170616
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

package/inc/ZipFile.hxx

@@ -55,9 +55,14 @@ class ZipEnumeration;
 
 class ZipFile
 {
+public:
+    enum class Checks { Default, CheckInsensitive };
+
+private:
     rtl::Reference<comphelper::RefCountedMutex> m_aMutexHolder;
 
     std::unordered_set<OUString> m_EntriesInsensitive;
+    Checks m_Checks;
 
     EntryHash       aEntries;
     ByteGrabber     aGrabber;
@@ -100,16 +105,12 @@ class ZipFile
 
 public:
 
-    ZipFile( rtl::Reference<comphelper::RefCountedMutex> aMutexHolder,
-             css::uno::Reference < css::io::XInputStream > const &xInput,
-             css::uno::Reference < css::uno::XComponentContext > xContext,
-             bool bInitialise );
-
     ZipFile( rtl::Reference<comphelper::RefCountedMutex> aMutexHolder,
              css::uno::Reference < css::io::XInputStream > const &xInput,
              css::uno::Reference < css::uno::XComponentContext > xContext,
              bool bInitialise,
-             bool bForceRecover );
+             bool bForceRecover,
+             Checks checks);
 
     ~ZipFile();
 

package/source/zipapi/ZipFile.cxx

@@ -80,30 +80,13 @@ using ZipUtils::Inflater;
 
 /** This class is used to read entries from a zip file
  */
-ZipFile::ZipFile( rtl::Reference<comphelper::RefCountedMutex> aMutexHolder,
-                  uno::Reference < XInputStream > const &xInput,
-                  uno::Reference < XComponentContext > xContext,
-                  bool bInitialise )
-: m_aMutexHolder(std::move( aMutexHolder ))
-, aGrabber( xInput )
-, aInflater( true )
-, xStream(xInput)
-, m_xContext (std::move( xContext ))
-, bRecoveryMode( false )
-{
-    if (bInitialise && readCEN() == -1 )
-    {
-        aEntries.clear();
-        m_EntriesInsensitive.clear();
-        throw ZipException( u"stream data looks to be broken"_ustr );
-    }
-}
-
 ZipFile::ZipFile( rtl::Reference< comphelper::RefCountedMutex > aMutexHolder,
                   uno::Reference < XInputStream > const &xInput,
                   uno::Reference < XComponentContext > xContext,
-                  bool bInitialise, bool bForceRecovery)
+                  bool bInitialise, bool bForceRecovery,
+                  Checks const checks)
 : m_aMutexHolder(std::move( aMutexHolder ))
+, m_Checks(checks)
 , aGrabber( xInput )
 , aInflater( true )
 , xStream(xInput)
@@ -1353,7 +1336,7 @@ sal_Int32 ZipFile::readCEN()
             }
             // this is required for OOXML, but not for ODF
             auto const lowerPath(aEntry.sPath.toAsciiLowerCase());
-            if (!m_EntriesInsensitive.insert(lowerPath).second)
+            if (!m_EntriesInsensitive.insert(lowerPath).second && m_Checks == Checks::CheckInsensitive)
             {
                 SAL_INFO("package", "Duplicate CEN entry (case insensitive): \"" << aEntry.sPath << "\"");
                 throw ZipException(u"Duplicate CEN entry (case insensitive)"_ustr);

package/source/zippackage/ZipPackage.cxx

@@ -844,7 +844,9 @@ void SAL_CALL ZipPackage::initialize( const uno::Sequence< Any >& aArguments )
     OUString message;
     try
     {
-        m_pZipFile.emplace(m_aMutexHolder, m_xContentStream, m_xContext, true, m_bForceRecovery);
+        m_pZipFile.emplace(m_aMutexHolder, m_xContentStream, m_xContext, true,
+            m_bForceRecovery,
+            m_nFormat == embed::StorageFormats::ZIP ? ZipFile::Checks::Default : ZipFile::Checks::CheckInsensitive);
         getZipFileContents();
     }
     catch ( IOException & e )
@@ -1217,7 +1219,9 @@ void ZipPackage::ConnectTo( const uno::Reference< io::XInputStream >& xInStream
     if ( m_pZipFile )
         m_pZipFile->setInputStream( m_xContentStream );
     else
-        m_pZipFile.emplace(m_aMutexHolder, m_xContentStream, m_xContext, false);
+        m_pZipFile.emplace(m_aMutexHolder, m_xContentStream, m_xContext, false,
+            false,
+            m_nFormat == embed::StorageFormats::ZIP ? ZipFile::Checks::Default : ZipFile::Checks::CheckInsensitive);
 }
 
 uno::Reference< io::XInputStream > ZipPackage::writeTempFile()

package/source/zippackage/zipfileaccess.cxx

@@ -244,7 +244,7 @@ void SAL_CALL OZipFileAccess::initialize( const uno::Sequence< uno::Any >& aArgu
                 m_aMutexHolder,
                 m_xContentStream,
                 m_xContext,
-                true );
+                true, false, ZipFile::Checks::Default);
 }
 
 // XNameAccess