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https://issues.apache.org/jira/browse/COMPRESS-380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16316165#comment-16316165
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Dawid Weiss commented on COMPRESS-380:
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Sure, I'll experiment and if it shows any improvement, I'll file an issue/
patch. With regard to deflate64 -- what C code are you referring to, btw.? I
was curious to see how deflate was different to deflate64 and looked at 7zip
sources; the decompressor is virtually the same, just passed with different
constants. 7zip is LGPL though, so we can't just borrow the code from there.
info-zip and zlib would be probably better candidates.
> Support for ENHANCED_DEFLATED (Deflate64) in ZIP files
> ------------------------------------------------------
>
> Key: COMPRESS-380
> URL: https://issues.apache.org/jira/browse/COMPRESS-380
> Project: Commons Compress
> Issue Type: New Feature
> Reporter: Dawid Weiss
> Fix For: 1.16
>
> Attachments: archive-deflate.zip, archive-deflate64.zip, archive.zip,
> archive64.zip, compress-380.diff, hello.world, input2
>
>
> Some of the (large) ZIP files we try to process currently will throw this:
> {code}
> UnsupportedZipFeatureException: unsupported feature method
> 'ENHANCED_DEFLATED'
> {code}
> which is a bummer since JDK's implementation also doesn't support Deflate64.
> This seems to be PKWare's extensions, although code to decrypt it exists in
> zlib (and is appropriately licensed, I believe).
> https://github.com/madler/zlib/tree/master/contrib/infback9
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