[compress] Zip password compressed archive
Hi all guys, do you know is there any way to protect with a password the produced zip archive, with [compress] APIs? Many thanks in advance, have a nice day! Simo http://people.apache.org/~simonetripodi/ http://www.99soft.org/ - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [compress] Zip password compressed archive
2011/2/7 Simone Tripodi simonetrip...@apache.org: Hi all guys, do you know is there any way to protect with a password the produced zip archive, with [compress] APIs? I guess not, however this might help: http://stackoverflow.com/questions/166340/write-a-password-protected-zip-file-in-java Antonio - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [compress] Zip password compressed archive
Hi, no, not from what I know. http://www.pkware.com/documents/casestudies/APPNOTE.TXT (search for decryption) even when zip compression is considered weak... wouldn't this be a cool feature for compress 1.2? In the spec is even pseudo code :-) Cheers Christian On Mon, Feb 7, 2011 at 11:32 AM, Simone Tripodi simonetrip...@apache.org wrote: Hi all guys, do you know is there any way to protect with a password the produced zip archive, with [compress] APIs? Many thanks in advance, have a nice day! Simo http://people.apache.org/~simonetripodi/ http://www.99soft.org/ - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org -- http://www.grobmeier.de - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [compress] Zip password compressed archive
On 2011-02-07, Simone Tripodi wrote: do you know is there any way to protect with a password the produced zip archive, with [compress] APIs? No, compress currently doesn't support any of the various encryption options of the ZIP format. https://issues.apache.org/jira/browse/COMPRESS-88 Note that different ZIP tools have different understandings on what password protected ZIPs are. The traditional version uses a pretty weak encryption algo that could be implemented inside compress but hasn't been (yet?). This most likely is what you are looking for since it is supported by many of the existing tools. Strong encryption is used in different ways by PKWARE and WinZip. The PKWARE approach comes with legal strings attached that makes it difficult to implement (if at all possible) inside commons-compress. The WinZIP approach can certainly be implemented in Java (see Antonio's link which ultimately leads to http://code.google.com/p/winzipaes/) but isn't widely supported in tools other than WinZIP. Stefan - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [compress] Zip password compressed archive
Thanks a lot for all the suggestions guys, very appreciated! Have a nice day, Simo http://people.apache.org/~simonetripodi/ http://www.99soft.org/ On Mon, Feb 7, 2011 at 12:15 PM, Stefan Bodewig bode...@apache.org wrote: On 2011-02-07, Simone Tripodi wrote: do you know is there any way to protect with a password the produced zip archive, with [compress] APIs? No, compress currently doesn't support any of the various encryption options of the ZIP format. https://issues.apache.org/jira/browse/COMPRESS-88 Note that different ZIP tools have different understandings on what password protected ZIPs are. The traditional version uses a pretty weak encryption algo that could be implemented inside compress but hasn't been (yet?). This most likely is what you are looking for since it is supported by many of the existing tools. Strong encryption is used in different ways by PKWARE and WinZip. The PKWARE approach comes with legal strings attached that makes it difficult to implement (if at all possible) inside commons-compress. The WinZIP approach can certainly be implemented in Java (see Antonio's link which ultimately leads to http://code.google.com/p/winzipaes/) but isn't widely supported in tools other than WinZIP. Stefan - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
