i have a zip file here, packed with pkAES-256 Deflate algorithm and /zip is unable to unpack it. "Method not supported" is the error message.
stable version 4.65 brings the error and the newest beta 9 brings the error and hangs up so i have to quit it via task manager.
So my question: Is it planned to integrate the pkzip algorithm so 7-Zip can unpack such kind of files?
Thanks in advance
7-Zip 9 must unpack such archives. Send me some example of "bad" archive to email. I'll check it.
Hi, Igor and community.
I've got similar problem with pkAES-256 Deflate and latest 7-Zip 9.15 beta.
I can tell you that I have generated this archive by PKWARE SecureZIP.
Passphrase for the following testing file is 123123Qaz
Direct link to file: 123123.zip
Thank you for digging in this problem beforehand.
The encryption method of that archive is too complex for 7-Zip. It uses 3DES.
Did you use default options to create that archive?
Maybe it's old version of SecureZIP?
I'm sorry for slow reaction.
I can't tell about default options, but at least I didn't change them.
Our version of SecureZip is 12.30.0016
Try to encrypt another files with SecureZip. And look what options do you have.
I had the same problem with a ZIP-archive produced by SecureZIP, which I could't open with 7-zip. So I used the 30-day trial of SecureZIP (12.4.016) for some own tests:
Only the lowest encrpytion methode called "Traditional: passphrase" in SecureZIP produces an archive with ZIPCrypto-compression, which can be opened in 7-zip.
All other encryption methodes like "strong: passphrase" results in pkAES-256 compressed archives.
I guess the pkAES-methode is owned by pkware,inc and could never be supported by 7-zip, right?
What version of 7-Zip do you use?
There is BUG in 7-Zip 9.24 alpha - 9.30 alpha versions.
These alpha versions could not extract ZIP archives encrypted with PKWARE-AES method.
Try 7-Zip 9.20 instead.
Also there are still unsupported method.
And 7-Zip doesn't support encrypted headers (encrypted filenames) in ZIP archives.
I used the 64-bit-versions of 9.25 and 9.30 of 7-zip on WIN7-64.
confirmed...with 9.20 I can open my self produced SecureZIP-archives.
I got now a pkAES-256 zip-file, that is now shown in 7fm to be produced with "version 61", perhaps from new pkWare SecureZIP 14. It was for me unable to open this new file - I tried the stable 7-zip versions 9.20 and the alpha 9.25.
The older zip files with "version 51" I was able to open them.
Therefor it would be more than nice to have a solution for with 7z. Temporarily I have to use also the ZIPReader by PKWARE to go further.
Happy and healthy new year.
Same problem still happens using latest alpha version 7-Zip 9.32 alpha.
> 7z l -slt archive.zip
7-Zip 9.32 alpha Copyright (c) 1999-2013 Igor Pavlov 2013-12-01
Listing archive: archive.zip
Path = archive.zip
Type = zip
Physical Size = 5576
Path = filename.xls
Folder = -
Size = 28160
Packed Size = 5332
Modified = 2014-01-02 11:55:37
Created = 2014-01-02 11:55:17
Accessed = 2014-01-02 11:55:37
Attributes = ....A
Encrypted = +
CRC = 34D83C98
Method = pkAES-256 Deflate
Host OS = FAT
Version = 61
Above archive unzip's just fine with latest WinZip.