[Bug 220654] Re: unzip will not open 256 AES zip files

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: unzip (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/220654

Title:
  unzip will not open 256 AES zip files

Status in unzip package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: file-roller

  Winzip and many other zip programs can now produce zip files that are
  protected by 256 AES encryption.  Unzip in ubuntu cannot handle these
  zips. The files within the zips are shown fine but when you try and
  extract the following error occurs:

  skipping: Test.txt                unsupported compression method 99

  I believe this is because "unzip" is used to extract the archive. This is the output from "unzip":
  dbrewer at HCC122J:~/Desktop$ unzip Test.zip
  Archive:  Test.zip
     skipping: Test.txt                unsupported compression method 99

  If "7z" is used it works fine:
  dbrewer at HCC122J:~/Desktop$ 7z x Test.zip

  7-Zip 4.51 beta  Copyright (c) 1999-2007 Igor Pavlov  2007-07-25
  p7zip Version 4.51 (locale=en_GB.UTF-8,Utf16=on,HugeFiles=on,2 CPUs)

  Processing archive: Test.zip

  Extracting  Test.txt
  Enter password (will not be echoed) :

  Everything is Ok

  I attach an example of this kind of file.  The password is "monkey"
  (no quotes).

  Note peazip also can handle this.

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