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

[Kakurady Drakenar]

>From my perspective as a user, the problem is that file-roller won't
open encrypted zip archives, without telling me why.

Installing p7zip-full solves that problem. But again, file-roller
doesn't tell me that's a solution.

So would the right response here being 
- add p7zip-full as a dependency of the file-roller package?
- change file-roller so it requests installing p7zip-full?
- add AES decryption to unzip, which hasn't been updated in 7 years? 

Perhaps this bug should be changed back to affecting file-roller, or
separate bugs filed against file-roller for 1 and 2.

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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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