Host OS of unix doesn't seem to be handled

[GoogleCodeExporter]

I have a zip file (sorry I can't give it out), which has files inside 
reporting as AES-256 Deflate encryption but the Host OS is "Unix" (according 
to 7zip).  This file cannot be decrypted I assume due to the host OS? I have 
tried with another zip file with Host OS "Fat" and this works. Any way to fix 
this? - 7zip is able to open and extract both files.

Original issue reported on code.google.com by james.c...@gmail.com on 7 Apr 2010 at 1:57

[GoogleCodeExporter]

Can you try to make sure, that it's a winzip aes encrypted file by decrypting 
it with
winzip (the evaluation version should be available free of charge)?

Original comment by olaf.merkert on 7 Apr 2010 at 6:06

[GoogleCodeExporter]

james did not answer, so I take the liberty to close the issue ("invalid" as 
was not
able to reproduce the condition)

Original comment by olaf.merkert on 11 Apr 2010 at 5:56

• Changed state: Invalid

[GoogleCodeExporter]

Apologies, I assume this file was not created using winzip but some other way 
of AES 
encrypting a zip file.  Do you happen to know any way to decrypt non-winzip aes 
zip 
files?

Original comment by james.c...@gmail.com on 12 Apr 2010 at 1:02

[GoogleCodeExporter]

no worries - but as there are many ways (varying in their level of 
"standardisation")
to AES encrypt ZIP data, it's quite hard to point you into a direction - I'd 
start
with pkzip's aes (http://en.wikipedia.org/wiki/PKZIP) which differs from 
winzip's aes

Original comment by olaf.merkert on 12 Apr 2010 at 5:27