Re: how to secure the file uploading process using form-based upload

From:
"Oliver Wong" <owong@castortech.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 25 Sep 2006 14:01:05 GMT
Message-ID:
<BiRRg.32807$bf5.9299@edtnps90>
"Babu Kalakrishnan" <bkk.ngroup@gmail.com> wrote in message
news:ef2drr$2p6a$1@registered.motzarella.org...

david wolf wrote:

I am using apache commns fileupload to let users to upload their files
to a web site. The web site itself is using https protol, so that the
file is securely uploade through the internet using the HTML form based
uploading process. However, when the file lands on the hard disk of the
web server, it is unencrypted.

My question is that, if my web site is compromised by some attacker,
these files will be exposed to the attacker, is there a way to do the
follows:

[...]

As for temporary files being exposed, I'm not that familiar with the
Apache FileUpload API - but you could check if some way of accessing the
incoming file data as a stream is available that does not involve creating
temporary files - If it is, then you could perform on the fly encryption
on the stream, and the data would never appear on disk in its unencrypted
form.


    Well, the data might appear inside of the OS swap file...

    - Oliver

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