Zbynek Vyskovsky created COMPRESS-653:
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Summary: ZipArchiveOutputStream multi archive updates metadata in
incorrect file
Key: COMPRESS-653
URL: https://issues.apache.org/jira/browse/COMPRESS-653
Project: Commons Compress
Issue Type: Bug
Components: Archivers
Affects Versions: 1.25.0
Reporter: Zbynek Vyskovsky
`ZipArchiveOutputStream` fails to update metadata (compressed size, CRC) when
file is split into multiple archives. The original stream is closed and the
metadata is written into currently open channel instead.
Such archive is then not possible to process with regular zip utility as
metadata is incorrect and the data stream may be broken because of incorrectly
overwritten content by metadata.
The issue is in `rewriteSizesAndCrc()` function which uses currently open
channel.
When `addRawArchiveEntry()` and metadata is populated in advance, the produced
archive is correct.
Full fix is more complicated as the archiver needs to keep multiple channels
open. As a quick fix, throwing unsupported operation exception may be
sufficient to avoid silent failure.
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