Bug 493670 - unsupported compression method 99
unsupported compression method 99
Product: Fedora
Classification: Fedora
Component: unzip (Show other bugs)
All Linux
low Severity medium
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Assigned To: Karel Klíč
Fedora Extras Quality Assurance
Depends On:
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Reported: 2009-04-02 11:29 EDT by Rahul Sundaram
Modified: 2013-03-13 01:44 EDT (History)
5 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2009-11-20 05:57:53 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Rahul Sundaram 2009-04-02 11:29:02 EDT
Description of problem:

unzip fails to uncompress a zip file.

#unzip foo.zip 

Archive:  foo.zip
skipping: bar.wmv            unsupported compression method 99

# file foo.zip

foo.zip: Zip archive data, at least v2.0 to extract

My understanding is that, it is a password protected zip file created in Windows using PKZIP

Version-Release number of selected component (if applicable):


Additional info:

7zip works perfectly on the same zip file
Comment 1 Bug Zapper 2009-11-18 06:40:20 EST
This message is a reminder that Fedora 10 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
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bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '10'.

Package Maintainer: If you wish for this bug to remain open because you
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Comment 2 Ivana Varekova 2009-11-18 08:04:19 EST
Package maintainer was changed -> changing the bug owner.
Comment 3 Karel Klíč 2009-11-20 05:57:53 EST
Compression method 99 indicates the AES encryption. Maybe it will be supported in the next upstream release:


It is not trivial to implement it, therefore I am closing it as WONTFIX.
Comment 4 webbertiger 2009-12-10 21:40:07 EST
Unzip tool 7z can handle AES decompression:
7z x foo.zip
In Debian you can install p7zip-full to get this tool, probably they have similar thing for RH.
Comment 5 Romeo Kienzler 2013-03-12 09:42:06 EDT
Hi, since I'm having the same issue with RHEL 6.3 I'm responding to this old thread. Here is how to fix it:

Enable the EPEL and RPM-Fusion repositories (google how to do it)

type in:

sudo yum --enablerepo=rpmfusion-free-updates --enablerepo=rpmfusion-nonfree-updates --enablerepo=epel install p7zip

Now just doubleclick your encrypted zip-file...

Romeo Kienzler

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