Re: Partial transfer of rsyncrypto encrypted files

[Julian P. R. <jul...@gm...>]

Sounds like the files are totally different... silly question: is gzip
patched with the rsyncable flag?Can you use a hex compare tool to confirm
that most of the files are the same?

On Fri, Jul 31, 2009 at 11:58 AM, Shachar Shemesh <sh...@sh...>wrote:

>  Jan Alphenaar wrote:
>
>  Julian,
>
>
>
> Both scenario’s you describe are the way rsync should behave, but it does
> not. Let me just describe how case a can be reproduced.
>
>
>
> Take a large zip file, my file is now 100MB, and encrypt it with
> rsyncrypto. Now rename that file to 1.zip. Encrypt this file again and
> rename the encrypted file to 2.zip. Both files should be the same (except
> the first blocks), right ?
>
> That really depends on whether you encrypted them using the same session
> key.
>
>
> Hope it is a bit more clear now.
>
>
>
> Regards,
>
>
>
> Jan
>
>
>
> Here is what I'm testing.
>
> dd if=/dev/urandom of=/tmp/test bs=$((1024*1024)) count=100
>
>
> Create a 100MB random file.
>
> sun@sunlap:/tmp$ rsyncrypto test test1.enc test.key
> /usr/share/doc/rsyncrypto/examples/tests/cert.crt
> sun@sunlap:/tmp$ rsyncrypto test test2.enc test.key
> /usr/share/doc/rsyncrypto/examples/tests/cert.crt
>
> Create two files which are (almost) identical. vbindiff confirms this - the
> two files have a different header, but several bytes into the file they
> become identical and remain so until the end of the file.
>
> If this is your situation, rsyncrypto is working as advertised. If rsync
> does not do the expected thing with this case (for example, because it does
> not apply the rsync algorithm to files that start off differently but become
> identical in cases of partial transfers), then this is a rsync bug, and has
> nothing to do with rsyncrypto.
>
> Shachar
>
> --
> Shachar Shemesh
> Lingnu Open Source Consulting Ltd.http://www.lingnu.com
>
>
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
> trial. Simplify your report design, integration and deployment - and focus
> on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Rsyncrypto-devel mailing list
> Rsy...@li...
> https://lists.sourceforge.net/lists/listinfo/rsyncrypto-devel
>
>