system/exec stream

[ManWithNoName]

As known, one can use e.g. fopen to stream Zip files, such as:

fopen('zip://file.zip#folder/file')

Now how can you combine that with this:

system("c:/winzip -e -sPassword pathToZipFile extractTo")

So that you will stream a zip file that is password protected?

[Kudose]

Check out [man]passthru[/man] and http://us2.php.net/zip

[Kudose]

You could also use system to extract the file to a temporary location, then fopen to download the file.

[ManWithNoName]

"Check out passthru"

I looked at the passthru() command and tried it out, and it does nothing...?

passthru("c:/winzip -e -sPassword pathToZipFile extractTo",$ret) 

Just returns a 1. And the zip file is executed as usual.

I also found popen (http://se.php.net/manual/en/function.popen.php) and proc_open() (http://se.php.net/manual/en/function.proc-open.php)

It feels like I need one them. Something like: while opening the file executing a external program. However I can't find anything in the manual that indicates the use of an external program.

These functions are a headache, I have zero experience with command line and shell, exec, and stuff like that, so all this is very hard for me.

"Check out http://us2.php.net/zip"

I have been using php 5.2 zip support, and while it's great and all, it does not support password functions, so I used the exec command to pass-protect the files.

"You could also use system to extract the file to a temporary location, then fopen to download the file."

The problem with that is: the file is big, and if the user wants to have a look at one file in the archive then the entire archive have to be extracted and stuff; I need to stream.

In other words, I need to get the fopen to run the system/exec function.. Or something like that...

[ManWithNoName]

Note for future self('s).

Using the fopen on the encrypted zip file gave some interesting results

fopen('zip://file.zip#folder/file');

will echo out a scrambled string.

I'm way over my head now, but as far as I have understood winzip (and encryption), the encryption is added to each file, which makes me conclude that if you know the correct "keys" you could decrypt the content (that is the "scrambled string") "manually" with PHP.

Resources of interest could perhaps be...

AES Encryption Information: Encryption Specification AE-1 and AE-2

and

AES Coding Tips for Developers