Getting access to encrypted zip files

hey folks!
has anyone of you successfully decrypted a password-protected zip file with pure java code?
if so, please give me some advice or maby some sample code that I can figure out how it works.
thanks

sorry, I think I didn't express myself the right way.
the problem is the following:
a zip file is created with winzip and is also encrypted with it. this zip file is the input for the tool that I write. my tool should now be able to decrypt and uncompress all the encrypted files in the zip file.
as far as I know winzip uses different encryption algorithms, so I have no idea where to start.
I have already read about this bouncy castle stuff but didn't bring my any further

Similar Messages

Sending a 3DES encrypted zip file as one fields in the SOAP request xml.

Dear All,
We have a requirement to
- to create a text file, after mapping and content converisons, out of an IDoc xml file,
- zip this file
- encrypt this file using 3DES
- send this encrypted file as one of the tags of an xml request file to a webservice
Could one of you please help me with any pointers to how we can do this, mainly on how to send the encrypted zip file as one of the tags of an xml file?
Please write back to me if you need more details/clarity on my query.
Kind Regards,
Thomas.

Hi Udo,
Thank you for the response.
Please let me try this option and get back to you with my findings.
Kind Regards,
Thomas.

How to get access to the local file system when running with Web Start

I'm trying to create a JavaFX app that reads and writes image files to the local file system. Unfortunately, when I run it using the JNLP file that NetBeans generates, I get access permission errors when I try to create an Image object from a .png file.
Is there any way to make this work in Netbeans? I assume I need to sign the jar or something? I tried turning "Enable Web Start" on in the application settings, and "self-sign by generated key", but that made it so the app wouldn't launch at all using the JNLP file.

Same as usual as with any other web start app : sign the app or modify the policies of the local JRE. Better sign the app with a temp certificate.
As for the 2nd error (signed app does not launch), I have no idea as I haven't tried using JWS with FX 2.0 yet. Try to activate console and loggin in Java's control panel options (in W7, JWS logs are in c:\users\<userid>\appdata\LocalLow\Sun\Java\Deployment\log) and see if anything appear here.
Anyway JWS errors are notoriously not easy to figure out and the whole technology in itself is temperamental. Find the tool named JaNeLA on the web it will help you analyze syntax error in your JNLP (though it is not aware of the new syntax introduced for FX 2.0 and may produce lots of errors on those) and head to the JWS forum (Java Web Start & JNLP Andrew Thompson who dwells over there is the author of JaNeLA).

IPad: Open AES-encrypted zip files?

Is there an app which allows one to open zip files that were encrypted with AES-128 or AES-256? There was a discussion last year (https://discussions.apple.com/message/12429143) saying that there were none at the time, but I'm hoping for some progress since then. GoodReader, Filer LIte, and USB Disk Pro all failed to read files encrypted with either algorithm. Thanks,
John

Is there an app which allows one to open zip files that were encrypted with AES-128 or AES-256? There was a discussion last year (https://discussions.apple.com/message/12429143) saying that there were none at the time, but I'm hoping for some progress since then. GoodReader, Filer LIte, and USB Disk Pro all failed to read files encrypted with either algorithm. Thanks,
John

Why do all downloads get downloaded as a zip file?

Recently I was asked about downloading a file as a zipped file. I clicked ok. I didnt pay much attention to it as I thought it was just for that particular file. Now everything I download downloads as a zip file. Anyone know how to fix?

I have not seen this happen. Zip files get saved as Zip files. DMG files get saved as DMG files. In order to convert, and or make, a Zip file out of one or any number of files you need a program, or a feature in the OS, to create a Zip archive file with that one or many files.
Do you have such a program installed? Like Stuffit?

Old DW4 website files - how do I access and use .zip files?

I have been given a .zip file of a now defunct website (Dreamweaver 4) which I wish to ressurrect! Do I need DW4 to access these website files or are the newer versions backward complient? Absolute novice so any advice/assistance gratefully appreciated. Thanks.

1. Double click your .zip file and drag the contents out onto your desktop to extract the archive.
     Don't just attempt to use the files in the .zip archive within DW without moving them out.
     They will appear to be "browseable" to your OS, but they won't/can't work as a website while in the archive
2. Make sure all of the files are within a single folder (not the Desktop itself)
     Desktop > MyWebsiteName > all website files
3. From your current version of DW, go to Site > New Site...
4. Give the site a name and browse to the folder from Step 2 for Local Site Folder
5. If you have your FTP info, you can enter it under Servers at this time, but you don't need it right away to create the Site Definition to start working with DW
6. Hit Save
From there on out, you will work from DW while your site name from Step 4 is displayed in the left dropdown menu of the Files Window (go to Window > Files or hit F8 if it's not visible)
Snakeyez warning about deprecated features will likely be your biggest hurdle while working on an old site in a new version of DW. Hopefully, the original creator didn't use much of the old DW Spry based functionality.

Search Server is unavailable and could not be accessed While crawling .zip files

I Have Search Service Application running in one of the Application Server in my Farm. I am using Continuous Crawl to Crawl My Local SharePoint Site Content Source. Today I looked at SearchServiceApp:CrawlLog-URl page and Found out following error message
was encountered while crawling .zip files in the document library of a site.
I checked my list of Allowed File types .zip is listed

Hi octopus,
According to your description, my understanding is that you got an error when you crawl zip files in SharePoint 2010.
Whether this error occurred for all zip files in the entrie farm.
Please disable the authentication loopback, then do a full crawl, compare the result.
For disabling the authentication loopback, you can do as the followings:
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
Right-click Lsa, point to New, and then click DWORD Value.
Type DisableLoopbackCheck, and then press ENTER.
Right-click DisableLoopbackCheck, and then click Modify.
In the Value data box, type 1, and then click OK.
Exit Registry Editor.
Restart the computer.
Here are two similar posts for your reference:
http://sharepoint-kit.blogspot.jp/2013_08_01_archive.html
http://suryapulipati.blogspot.jp/2013/10/the-sharepoint-item-being-crawled.html
If this issue still exists, please check the log file to find more information about this issue. The path of the log file is: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\LOGS.
I hope this helps.
Thanks,
Wendy
Wendy Li
TechNet Community Support

How to unzip a encrypted zip file in unix

Hi Experts,
when i am trying to unzip a zip file in unix. error showing given below
$ unzip -o -P yareea 46 20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip
Archive: 20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
note: 20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip may be a plain executable, not an archive
unzip: cannot find zipfile directory in one of 20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip or
20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip.zip, and cannot find 20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip.ZIP, period.
plese do needful.. its urget...
Regards,
Sri.

hi,
I tried with renaming of file
$ mv 20120119_134107~20120118_000101.CUST_RFRSH_RESP.DNB.20111130.TXT.zip file.zip
$ unzip -P Marketintelligence2 file.zip
Archive: file.zip
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
note: file.zip may be a plain executable, not an archive
unzip: cannot find zipfile directory in one of file.zip or
file.zip.zip, and cannot find file.zip.ZIP, period.
eventhough its giving same result.

Memory does not get released after encrypting/ decrypting files.

I am using javax.crypto package to encypt/decrypt files but the problem is that once a big file (around 100- 700 mb) is encrypted there is spike in memory of 70 Mb (first time) and whole of this memory is not released after execution is finished. I have kept my application run for days but this memory do not come down.
Interesting thing is if I encrpyt/ decrypt the same file again and again the memory do not rise by 70 Mb, but for first 3-4 iterations 5-8 Mb of memory is released in each iteration and after that memory starts increasing again in chunk of 2-5 Mb and after few iteration some memory get released but in all the memory always increases. The code to encrypt file is simple
Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] salt = generateRandomBytes(16);
Rfc2898DeriveBytes rfc = new Rfc2898DeriveBytes("123456", salt, 1000);
SecretKey key = new SecretKeySpec(rfc.getBytes(32), "AES");
c.init(Cipher.ENCRYPT_MODE, key );
FileOutputStream fos = new FileOutputStream(encryptedFile);
CipherOutputStream cos = new CipherOutputStream(fos);
FileInputStream fis = new FileInputStream(largeInputFile);
int len = 0;
byte[] buf = new byte[1024 * 128];
while((len = fis.read(buf)) != -1) {
cos.write(buf, 0, len);
cos.close();
fis.close();
This is simple observation I have seen in my program:
I am using Windows 7 64 bit with 16 GB RAM Intel Core 2 Duo 3.00 GHz and file encrypted was 700 MB size
Explanation
Memory Usage (As shown in Windows Task Manager Private Working Set column)
When program starts
9924 K
After first iteration of encryption
81,180 K
Second Iteration
78,254 K
3 Iteration
74,614 K
4 Iteration
69,523 K
5 Iteration
72,256 K
6 Iteration
70,152 K
7 Iteration
83,327 K
8 Iteration
85,613 K
9 Iteration
95,124 K
10 Iteration
92,698 K
11 Iteration
94,670 K
I kept the iteration on for 2000 iteration, the same pattern was observed and at the end memory usage 184,951 K, this memory was not released after calling System.gc() also.
What could be the possible problem, is it the CipherOutputStream or Cipher class having some memory leak or I am doing something wrong here?

ash wrote:
We are using WebLogic Server 7.0 runing on Solaris 2.7.
We are experiencing a problem where the memory does not seem to be released after
the application has been shut down.What do you mean by "application has been shut down"? Is the server
process running or not? Is it a zombie?
The
Unix 'top' command reports that memory has not been reclaimed by the O/S. What exactly has it reported? If the process is gone, then I'm pretty
sure your O/S has reclaimed the memory. What exactly are you looking at
in top?
-- Rob
> Continue
restarting it will forces us to reboot the server as there will be more and more
memory lost when restarting the WebLogic.
Advice to fix the problem is much appreciated. Thanks.

Accessing QuickTime metadata to get access to iMovie DV file timestamps.

Can anyone point me to a way to view DV file metadata from a QuickTime file (specifically, the .mov or .dv files captured by iMovie). I am needing to write a DV file renamer, based on the timestamp inside the DV clip, so I am hoping to be able to AppleScript it (or find a command line utility I can use to extract it).
Thanks, much.

Do you mean programs like "MetaX" or "a better finder"? I'm actually looking for something that can edit the tags/annotations for "actor", "director", "producer", etc in .mov and .mp4 files that's better than MetaX. In some files, and I haven't found a pattern yet, MetaX will take a 3.8GB file and output a 5.7GB file when adding metadata info...as such rendering the 4gb+ mp4 file unusable. (i've never been able to get an mp4 file larger than 4gb to work in itunes/frontrow)

LrHttp.get redirect and downloading a file "zip"

I trying to figure if I can use LrHttp.get to download a zip file via a URL that does a redirection can anyone help?

This is the entire file, executed when user selects plugin extra from file menu:
local function httpRedirTest( call )
    local body, headers = LrHttp.get( "http://www.robcole.com/_test/redir2zip.cfm" )
    fso:writeFile( "C:\\_temp\\nada_.zip", body )
end
app:call( Service:new{ name="Test", async=true, guard=App.guardVocal, main=function( call )
    httpRedirTest( call )
end } )
Note: app-call-service-new... is a glorified call to LrFunctionContext.postAsyncTaskWithContext.
i.e. it must be called from an asynchronous task.
What is or is not happening when you execute similar code?
Could the problem be due to internet configuration (i.e. can your browser download the zip file when you click on the link above?).
Can you download zips when not through redirection?
i.e. if you replaced the url above with:
http://www.robcole.com/_test/nada.zip
does it work?
Rob

How can I stop Microsoft IE renaming .jar files to .zip files?

I realise this question has been asked before on this forum, but as far as I can tell no answer has yet been posted.
If I put a .jar file on my webserver for people to download, later versions of Internet Explorer will rename the file from xxx.jar to xxx.zip on the client's machine. Is there any way of stopping this from happening?
It looks like the problem is caused by IE examining the contents of the file and realising it uses ZIP compression. As a result, any file that I create (not just jars) that uses Java to zip the contents, when placed on a web server, gets interpreted as a .zip file by IE regardless of its extension.
I realise there are some workarounds such as zipping the .jar file, creating a .exe file from the .jar, telling everyone to use Firefox etc., but none of these are really acceptable or particularly efficient. I am really hoping there is something I can do to the .jar file or the compression process that will tell IE to leave the file alone.
Thanks,
Jo.

You can save any kind of document on iCloud Drive, as long as the file size is smaller than 15GB.
See: iCloud Drive FAQ
Create a new folder for your Office documents on iCloud Drive and drag your documents there, or select iCloud Drive in the File Chooser panel, when you save a document.

Xml file to mail scenario with zip file as an attachment

Hi experts,
I have a file to mail scenario. File is in xml format.
At receiver side, first I want to zip this file and send the zip file as an attachment using mail adapter.
How can i achieve this?
Regards
Divia

Hi Shabarish,
In the module tab i have specified the below beans
localejbs/AF_Modules/MessageTransformBean                           contentType
AF_Modules/PayloadZipBean                                                    zip
sap.com/com.sap.aii.adapter.mail.app/XIMailAdapterBean           mail
In the module configuration i mentioned as
Transform.ContentDescription   file
Transform.ContentDisposition   attachment:filename="file.xml"
zip.filenameKey                      contentType
zip.mode                                zipOne
Now i am getting the mail with zip file as an attachment.But the name of the attachment i got is MainDocument.zip
Even the file name inside the zip is MainDocument.xml.
How can i specify my own file name for both zip file and the file inside the archieve folder.Please help me.
Regards
Divia

Read encrpted zip file and ftp unzip file

Hi,
I have a situation,where i need to read 3 zip files, which are encrpted, and each zip file may have lot of images and text files. all i want to do is, read these 3 zip files and unzip + ftp to another directory. No mapping is involved. if the three files are not there, it should error out.
I have some ideas, but thought if any of you have better ideas.
Thanks
Pandari

Hi Pandari
File adapter
module to zip and unzip
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework
/people/michal.krawczyk2/blog/2007/02/08/xipi-command-line-sample-functions
<b>Check this weblog:</b>
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework
Check this out !
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework%3Fpage%3Dlast%26x-order%3Ddate%26x-showcontent%3Doff
also
https://service.sap.com/sap/support/notes/965256
Check this weblog on how to zip the file using XI:
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework
PayloadZip Bean
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework%3Fpage%3Dlast%26x-order%3Ddate%26x-showcontent%3Doff
Through command line
Check case 2 in this blog
/people/michal.krawczyk2/blog/2007/02/08/xipi-command-line-sample-functions
or ref plsz go tru it,
/people/michal.krawczyk2/blog/2007/02/08/xipi-command-line-sample-functions
Check this weblog on this from stefan:
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework
http://help.sap.com/saphelp_nw70/helpdata/en/84/2e3842cd38f83ae10000000a1550b0/frameset.htm
/people/michal.krawczyk2/blog/2005/12/18/xi-sender-mail-adapter--payloadswapbean--step-by-step
Zip or Unzip your Payload with the new PayloadZipBean module of the XI Adapter
/people/stefan.grube/blog/2007/02/20/working-with-the-payloadzipbean-module-of-the-xi-adapter-framework
XI/PI: Command line sample functions -> go through case 2
/people/michal.krawczyk2/blog/2007/02/08/xipi-command-line-sample-functions
Create encrypted ZIP files
Thanks!!!

Alternative APIs for reading Zip files?

Hi all.
At the moment, our application handles zip files by copying the zip file to the temp directory and then creating a new ZipFile. However, the larger the zip file we encounter, the slower this copy becomes. We also need random access to the Zip file, so the usual workaround of using ZipInputStream is also slow, although slightly faster for random access than copying the entire file.
I raised a bug requesting a better constructor for ZipFile, but it was turned down as they seemed to think I didn't want random access.
But does anyone know of any alternative APIs which can access Zip files in a more random access fashion? I've discovered a few other alternative implementations of ZipFile, but all of them so far have had this issue of requiring a File.

intensive. I am basically searching through zip
files to find a file and then taking that inputstream
for processing. I am basically looping through the
zip file until i match the filename....pretty crazy.I think it is pretty I/O intensive...hence slower
to see what I can do to increase performance. I am
using the following parameters:
-Xms512m -Xmx1024M -Xss16M -XX:ThreadStackSize=256
-XX:MaxPermSize=256m
Parameters look ok. I am not sure what -XX:ThreadStackSize will do as -Xss also sets the stack size? you can also try to pass -server and keep both Xms and Xmx to 1024 and see if it brings any improvement.
-BJ

Getting access to encrypted zip files

Similar Messages

Maybe you are looking for