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  1. JDK
  2. JDK-8303866

Allow ZipInputStream.readEnd to parse small Zip64 ZIP files

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 23
    • 21
    • core-libs
    • None
    • b10
    • generic
    • generic

    Description

      ZipInputStream.readEnd currently expects 8-byte size and csize fields in the data descriptor header if and only if the actually numbers of compressed or uncompressed bytes exceeds the Zip64 limit of 0XFFFFFFFF.

      This prevents parsing of small zip64 entries, such as the ones created using:

      echo hello | zip -fd > hello.zip

      The APPNOTE.txt specification indicates that such files are valid, so ZipInputStream should be able to parse them:

      When extracting, if the zip64 extended information extra
      field is present for the file the compressed and
      uncompressed sizes will be 8 byte values.

      The solution is to update ZipOutputStream.readEnd to check for the presence of Zip64 extra information fields in the LOC.

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        Issue Links

          csr for

          CSR - null JDK-8323583 Allow ZipInputStream.readEnd to parse small Zip64 ZIP files

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. JDK-8314891 Additional Zip64 extra header validation

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8298530 ZipInputStream.readEnd fails for certain ZIP64 archives with small files

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. JDK-7073588 ZipInput/OutputStream handling of the data descriptor is wrong for big entries

          • P3 - Major loss of function.
          • Closed
          links to

          Commit Commit openjdk/jdk/628cd8a4

          Review Review openjdk/jdk/12524

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              eirbjo Eirik Bjørsnøs
              eirbjo Eirik Bjørsnøs
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              Dates

                Created:
                Updated:
                Resolved: