Can't extract files from some ZIP files

[InfoLibre]

Expected behaviour

Extract files from all zip files.

Actual behaviour

Some zip files can't be unzipped with CAJA. ZIP error.txt

Steps to reproduce the behaviour

With CAJA, right-click on the PSWRD.ZIP file I joined here. Choose Extract here. An error occurs.

MATE general version

1.22.2

Package version

1.22.2 PSWRD.ZIP

Linux Distribution

Linux Mint MATE 19.3

Link to downstream report of your Distribution

[InfoLibre]

I can open and extract files from this ZIP file with Midnight Commander, without any error.

[rbuj]

Make sure the PSWRD.ZIP file is not corrupted. You can try to recover the PSWRD.ZIP file:

$ zip -FF PSWRD.ZIP --out PSWRD-NEW.ZIP

test 1

$ 7z t PSWRD.ZIP 
...
ERRORS:
Headers Error

--
Path = PSWRD.ZIP
Type = zip
ERRORS:
Headers Error
Physical Size = 165480
...

test 2

$ 7z t PSWRD-NEW.ZIP 
...
Scanning the drive for archives:
1 file, 165480 bytes (162 KiB)

Testing archive: PSWRD-NEW.ZIP
--
Path = PSWRD-NEW.ZIP
Type = zip
Physical Size = 165480

Everything is Ok

Files: 32
Size:       307703
Compressed: 165480

[InfoLibre]

Yes, 7z find errors in it. But zip -F or -FF doesn't repair it. And I can extract files with mc and not with CAJA. Another example : BRGCLIP9.ZIP

[InfoLibre]

Other examples : AGATE.ZIP CARIB24.ZIP TAPMKR20.ZIP HYPHN1.ZIP BORIS.ZIP

[rbuj]

Yes, all zip files use legacy algorithms for compression method.

$ find . -name "*.ZIP" -exec zipdetails {} \; | grep "Compression Method" | cut -f 2- -d ' ' | sort -u
Compression Method    0000 'Stored'
Compression Method    0001 'Shrunk'
Compression Method    0006 'Imploded'

You can repack those files to 7z from command line:

$ sudo apt-get install atool
$ arepack -e -F 7z *.ZIP

Feel free to open a ticket in https://www.7-zip.org/support.html.

[InfoLibre]

Done : https://sourceforge.net/p/sevenzip/bugs/2238/

This ticket can be closed, as I made a bugreport on 7-zip website.

My other ticket on https://github.com/mate-desktop/engrampa/issues/347 has been closed without explanations. Could someone have a look at it, please ?

[rbuj]

I can unzip HYPHN1.ZIP from caja using "extract here". I can unzip the other files (new-AGATE.ZIP new-BORIS.ZIP new-CARIB24.ZIP new-TAPMKR20.ZIP) after fixing their headers:

$ for f in *.ZIP; do echo "zip -FF $f --out new-$f"; done | sh

All this suggests that the files are corrupted.

AGATE.ZIP was fixed after setting the bit 13 to 0 in General Purpose Flag: 0xA000 & (bitwise 0x2000) = 0x8000

$ zipdetails AGATE.ZIP > AGATE.ZIP.zipdetails
$ zipdetails new-AGATE.ZIP > new-AGATE.ZIP.zipdetails
$ diff AGATE.ZIP.zipdetails new-AGATE.ZIP.zipdetails

97,98c97
< 16385 General Purpose Flag  A000
<       [Bit 13]              1 'Encrypted Central Dir'
---
> 16385 General Purpose Flag  8000
120c119
< 163C4 General Purpose Flag  A000
---
> 163C4 General Purpose Flag  8000
123d121
<       [Bit 13]              1 'Encrypted Central Dir'
145,146c143
< 16403 General Purpose Flag  A000
<       [Bit 13]              1 'Encrypted Central Dir'
---
> 16403 General Purpose Flag  8000
168c165
< 16443 General Purpose Flag  A000
---
> 16443 General Purpose Flag  8000
171d167
<       [Bit 13]              1 'Encrypted Central Dir'
193,194c189
< 16483 General Purpose Flag  A000
<       [Bit 13]              1 'Encrypted Central Dir'
---
> 16483 General Purpose Flag  8000
216c211
< 164C3 General Purpose Flag  A000
---
> 164C3 General Purpose Flag  8000
219d213
<       [Bit 13]              1 'Encrypted Central Dir'

[InfoLibre]

Strange, I've got more than 100 files like that. Perhaps they were zipped with a buggy software. Thank you for you help.