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fix: Process ZIP files with up to a 65,978-byte comment (https://github.com/zip-rs/zip-old/issues/183)

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Chris Hennick 2024-05-05 19:48:32 -07:00
parent a8ec016b51
commit 52375437dc
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1 changed files with 2 additions and 1 deletions
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src/spec.rs
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@ -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"));