Intercepting memory mapped files

Saket Sinha saket.sinha89 at
Fri Jan 30 05:33:15 EST 2015


Kindly refer the following link that implements a minimal encryption over

Go through the wrapfs_encrypt in wrapfs_readpage and wrapfs_decrypt in

Saket Sinha

On Fri, Jan 30, 2015 at 3:56 PM, Kunal Baweja <bawejakunal15 at>

> Hi,
> I am currently working on implementing a simple encrypted file system
> using a stackable file system WrapFS <>. In
> order to do so, as I read in the WrapFS mailing list
> <>
> one needs to implement address space operations, which I have done and
> posted on my github at this link
> <>
> and it works fine. But now when I am trying to modify the data before being
> written in wrapfs_lower() function I get a blank output in files written
> out.
> Please guide where am I going wrong in modifying the data to be written
> and what could be the best way to decrypt it ?
> Thanks
> *Kunal Baweja*
> Undergraduate B.E. (Hons.) Computer Science
> Birla Institute Of Technology & Science, Pilani
> K.K. Birla Goa Campus
> +91 9049655665
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at
-------------- next part --------------
An HTML attachment was scrubbed...

More information about the Kernelnewbies mailing list