Withdrawn: 8303866: Allow ZipInputStream.readEnd to parse small Zip64 ZIP files

[duke]

On Sun, 12 Feb 2023 15:41:55 GMT, Eirik Bjorsnos <duke at openjdk.org> wrote:

> ZipInputStream.readEnd currently assumes a Zip64 data descriptor if the number of compressed or uncompressed bytes read from the inflater is larger than the Zip64 magic value.
> 
> While the ZIP format  mandates that the data descriptor `SHOULD be stored in ZIP64 format (as 8 byte values) when a file's size exceeds 0xFFFFFFFF`, it also states that `ZIP64 format MAY be used regardless of the size of a file`. For such small entries, the above assumption does not hold.
> 
> This PR augments ZipInputStream.readEnd to also assume 8-byte sizes if the ZipEntry includes a Zip64 extra information field. This brings ZipInputStream into alignment with the APPNOTE format spec:
> 
> 
> When extracting, if the zip64 extended information extra 
> field is present for the file the compressed and 
> uncompressed sizes will be 8 byte values.
> 
> 
> While small Zip64 files with 8-byte data descriptors are not commonly found in the wild, it is possible to create one using the Info-ZIP command line `-fd` flag:
> 
> `echo hello | zip -fd > hello.zip`
> 
> The PR also adds a test verifying that such a small Zip64 file can be parsed by ZipInputStream.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/12524