Winzip AES uses an insecure mode of operation

The function WinZipAesCipherStream() in WinZipAes.cs uses a cryptographic encryption algorithm with an insecure mode of operation (ECB) on line 414. internal WinZipAesCipherStream(System.IO.Stream ...

Id #17508 | Release: None | Updated: Thu at 6:09 AM by dkwakkel | Created: Thu at 6:09 AM by dkwakkel

HeapInspection possible

Several places (e.g. in method InternalExtract() in ZipEntry.Extract.cs) stores sensitive data in an insecure manner (a string), making it possible to extract the data via inspecting the heap. ...

Id #17507 | Release: None | Updated: Wed at 3:07 PM by dkwakkel | Created: Wed at 3:07 PM by dkwakkel

Insecure Randomness in WinZipAES

The random number generator implemented by NextBytes() cannot withstand a cryptographic attack. Recommedation: The .NET framework provides a cryptographic PRNG in System.Security.Cryptography.Rand...

Id #17506 | Release: None | Updated: Wed at 12:00 PM by dkwakkel | Created: Wed at 12:00 PM by dkwakkel

Missing files in windows explorer

If i open .ZIP file created with IONIC.ZIP.DLL in windows explorer, i cannot see some files. Extracting also does not help, files are missing. In that .zip i gave multiple (~20) excel files. I i us...

Id #17491 | Release: None | Updated: Aug 5 at 12:55 PM by JMN_DVLPR | Created: Aug 5 at 12:55 PM by JMN_DVLPR

Creating Zip For Drive

i am trying to zip entire drive by using using (ZipFile zip = new ZipFile()) { zip.AddDirectory(@"D:\"); } I am getting error stating that ...

Id #17490 | Release: None | Updated: Aug 5 at 11:18 AM by kksanghi | Created: Aug 5 at 11:18 AM by kksanghi

Bad state (invalid stored block lengths)

Running into this issue with relatively simple code. I have a zip file with a bunch of entries, and I regularly update those entries with new data using UpdateEntry. It seems that this corrupts t...

Id #17487 | Release: None | Updated: Jul 29 at 11:50 PM by Metachronism | Created: Jul 29 at 11:50 PM by Metachronism

unzip.exe - errorlevel =0 when error happens

When out of free space, it throws an exception but exit code is 0 (successful). Illustrated by cmd file: D:\Arc\UnZip\Unzip.exe "%1" echo %errorlevel% ... exception: System.IO.IOException: There ...

Id #17484 | Release: None | Updated: Jul 24 at 10:25 AM by Andy_Scull | Created: Jul 24 at 10:25 AM by Andy_Scull

unzip.exe, error when combining -cp and -f switches

Unzip.exe from provided tools package produces an error when extracting with both -cp and -f switches: I have a zip file created on japanese system and specifying codepage in command line 'unzip -...

Id #17478 | Release: None | Updated: Jul 14 at 12:46 PM by Andy_Scull | Created: Jul 14 at 12:46 PM by Andy_Scull

Handle error while extracting

I wanted to handle a situation similar to this one: http://stackoverflow.com/questions/18988534/ignore-file-if-it-is-corrupted ...with a partially corrupted ZIP file. I wanted to extract only the ...

Id #17471 | Release: None | Updated: Jul 9 at 11:29 AM by KGB_Rocks | Created: Jul 9 at 9:47 AM by KGB_Rocks

Library not providing Saving by Custom Order

I want to save a bunch of files with a particular file always saved and later extracted on the top in the total list of files.I have tried entriessorted and SortEntriesBeforeSaving with false and t...

Id #17448 | Release: None | Updated: May 29 at 1:25 PM by Priyanka786 | Created: May 29 at 1:25 PM by Priyanka786