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Date: Thu, 28 Dec 2017 09:00:19 +0000 (UTC)
From: "Stefan Bodewig (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
Message-ID: <JIRA.13037723.1485357238000.540307.1514451619252@Atlassian.JIRA>
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Subject: [jira] [Commented] (COMPRESS-380) Support for ENHANCED_DEFLATED
 (Deflate64) in ZIP files
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archived-at: Thu, 28 Dec 2017 09:00:24 -0000


    [ https://issues.apache.org/jira/browse/COMPRESS-380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16305188#comment-16305188 ] 

Stefan Bodewig commented on COMPRESS-380:
-----------------------------------------

Is anybody of the people who voted for this issue able to provide a (preferably small) ZIP archive that uses DEFLATE64 that we can add to our repository as a test case and distribute under the Apache Software License?

> 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: compress-380.diff
>
>
> 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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