From bc11cc335efff222d4f144055a690558c00edc49 Mon Sep 17 00:00:00 2001
From: PJ Fanning <fanningpj@apache.org>
Date: Fri, 7 Feb 2025 21:44:50 +0000
Subject: [PATCH] [bug-69563] try to avoid int overflow in Zip64 code (probably
 just moves the problem somewhere else though)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1923647 13f79535-47bb-0310-9956-ffa450edef68
---
 .../java/org/apache/poi/xssf/streaming/OpcOutputStream.java | 6 +++---
 .../main/java/org/apache/poi/xssf/streaming/Zip64Impl.java  | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/OpcOutputStream.java b/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/OpcOutputStream.java
index 2079746f94..c3fc63eebb 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/OpcOutputStream.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/OpcOutputStream.java
@@ -37,7 +37,7 @@ class OpcOutputStream extends DeflaterOutputStream {
     private final List<Entry> entries = new ArrayList<>();
     private final CRC32 crc = new CRC32();
     private Entry current;
-    private int written = 0;
+    private long written = 0;
     private boolean finished = false;
 
     /**
@@ -84,7 +84,7 @@ class OpcOutputStream extends DeflaterOutputStream {
         }
 
         current.size = def.getBytesRead();
-        current.compressedSize = Math.toIntExact(def.getBytesWritten());
+        current.compressedSize = def.getBytesWritten();
         current.crc = crc.getValue();
 
         written += current.compressedSize;
@@ -106,7 +106,7 @@ class OpcOutputStream extends DeflaterOutputStream {
         if(current != null) {
             closeEntry();
         }
-        int offset = written;
+        long offset = written;
         for (Entry entry : entries) {
             written += spec.writeCEN(entry);
         }
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/Zip64Impl.java b/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/Zip64Impl.java
index d2e00f56ed..647d94d436 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/Zip64Impl.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xssf/streaming/Zip64Impl.java
@@ -46,8 +46,8 @@ class Zip64Impl {
         final String filename;
         long crc;
         long size;
-        int compressedSize;
-        int offset;
+        long compressedSize;
+        long offset;
 
         Entry(String filename) {
             this.filename = filename;
@@ -128,7 +128,7 @@ class Zip64Impl {
     /**
      * Write End of central directory record (EOCD)
      */
-    int writeEND(int entriesCount, int offset, int length) throws IOException {
+    int writeEND(int entriesCount, long offset, long length) throws IOException {
         written = 0;
         writeInt(PK0506);         // "PK\005\006"
         writeShort(0);         // number of this disk