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https://issues.apache.org/jira/browse/COMPRESS-210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16072825#comment-16072825
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Simon Spero commented on COMPRESS-210:
--------------------------------------
zip extended timestamps are made signed! Doh!
> handle zip extra field 0x5455 - Extended Timestamp
> --------------------------------------------------
>
> Key: COMPRESS-210
> URL: https://issues.apache.org/jira/browse/COMPRESS-210
> Project: Commons Compress
> Issue Type: Improvement
> Components: Archivers
> Reporter: Julius Davies
> Assignee: Julius Davies
> Priority: Minor
> Fix For: 1.5
>
> Attachments: COMPRESS-210.patch
>
>
> From Info Zip's "zip-3.0" source archive (proginfo/extrafld.txt):
> -Extended Timestamp Extra Field:
> ==============================
> The following is the layout of the extended-timestamp extra block.
> (Last Revision 19970118)
> {noformat}
> Local-header version:
> Value Size Description
> ----- ---- -----------
> (time) 0x5455 Short tag for this extra block type ("UT")
> TSize Short total data size for this block
> Flags Byte info bits
> (ModTime) Long time of last modification (UTC/GMT)
> (AcTime) Long time of last access (UTC/GMT)
> (CrTime) Long time of original creation (UTC/GMT)
> Central-header version:
> Value Size Description
> ----- ---- -----------
> (time) 0x5455 Short tag for this extra block type ("UT")
> TSize Short total data size for this block
> Flags Byte info bits (refers to local header!)
> (ModTime) Long time of last modification (UTC/GMT)
> {noformat}
> The central-header extra field contains the modification time only,
> or no timestamp at all. TSize is used to flag its presence or
> absence. But note:
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