UNIX for Advanced & Expert Users

Hi ,

1-I need to know please if it's possible to compress using openssl?

Here is the version used:

Code:

openssl version -a
OpenSSL 0.9.7d 17 Mar 2004 (+ security fixes for: CVE-2005-2969 CVE-2006-2937 CVE-2006-2940 CVE2006-3738 CVE-2006-4339 CVE-2006-4343 CVE-2007-5135 CVE-2008-5077 CVE-2009-0590)
built on: date not available
platform: information not available
options:  bn(64,32) md2(int) rc4(ptr,char) des(ptr,risc1,16,long) blowfish(ptr)
compiler: information not available
OPENSSLDIR: "/etc/sfw/openssl"

2-does the compression with openssl save space more than gzip command?


I have been compressing using a command like this:

Code:

openssl  aes-256-cbc -a  -salt -in  test.in   -out  test.txt.enc -pass file:./mypass.txt

Yes, it uses the gzip libs = no difference. Use 'ssh -C' or the like, but you need a sub-option to set the level '-o CompressionLevel=9' Man Page for ssh (all Section 0) - The UNIX and Linux Forums
Man Page for ssh_config (all Section 5) - The UNIX and Linux Forums

You can always use a piped compression tool with ssh, like bzip2 or compress. Since ssh connections are binary, this works great. More CPUs makes light work. If you want to use many CPU and multiply the network speed, many compressed sessions in parallel are a neat ticket. Compression on a single file may actoally slow transfer, but it lightens net load in busy environments.

Thanks a lot , but the option "-C" is unknown to the version i use:

i_ebp@vfnla90s-z3> openssl version
OpenSSL 0.9.7d 17 Mar 2004 (+ security fixes for: CVE-2005-2969 CVE-2006-2937 CVE-2006-2940 CVE-2006-3738 CVE-2006-4339 CVE-2006-4343 CVE-2007-5135 CVE-2008-5077 CVE-2009-0590)
i_ebp@vfnla90s-z3>


Here is how i wrote the command:
i_ebp@vfnla90s-z3> openssl aes-256-cbc -a -Z -o CompressionLevel=9 -salt -in Archivedcollect.tared_on20130730224443.tar -out Archivedcollect.tared_on20130730224443.tar.gz.out -pass file:./pass.txt
unknown option '-Z'

Compression is in 'cms -comprress' or 'enc -z':
OpenSSL: Documents, cms(1)
OpenSSL: Documents, enc(1)
-C os the ssh/scp/sftp option.