From 52375437dc3b95c8786d12d5f85b51d0a792ee66 Mon Sep 17 00:00:00 2001
From: Chris Hennick <4961925+Pr0methean@users.noreply.github.com>
Date: Sun, 5 May 2024 19:48:32 -0700
Subject: [PATCH] fix: Process ZIP files with up to a 65,978-byte comment
 (https://github.com/zip-rs/zip-old/issues/183)

---
 src/spec.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/spec.rs b/src/spec.rs
index 7aa9f08e..997ea264 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -53,10 +53,11 @@ impl CentralDirectoryEnd {
 
     pub fn find_and_parse<T: Read + Seek>(reader: &mut T) -> ZipResult<(CentralDirectoryEnd, u64)> {
         const HEADER_SIZE: u64 = 22;
+        const MAX_HEADER_AND_COMMENT_SIZE: u64 = 66000;
         const BYTES_BETWEEN_MAGIC_AND_COMMENT_SIZE: u64 = HEADER_SIZE - 6;
         let file_length = reader.seek(io::SeekFrom::End(0))?;
 
-        let search_upper_bound = file_length.saturating_sub(HEADER_SIZE + u16::MAX as u64);
+        let search_upper_bound = file_length.saturating_sub(MAX_HEADER_AND_COMMENT_SIZE);
 
         if file_length < HEADER_SIZE {
             return Err(ZipError::InvalidArchive("Invalid zip header"));