Re: DES Cipher

2010-12-22 Thread Anton Shterenlikht 
On Wed, Dec 22, 2010 at 05:50:19PM +0330, Mohammad Hedayati wrote:
 Can anyone please show me a sample code for ciphering using DES in FreeBSD?

bdes(1)?

% ls -al  zzz
% bdes  zzz  zzz.des
Enter key: 
%

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 331 5944
Fax: +44 (0)117 929 4423
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Re: DES Cipher

2010-12-22 Thread Matthew Seaman 
On 22/12/2010 14:20, Mohammad Hedayati wrote:
 Can anyone please show me a sample code for ciphering using DES in FreeBSD?

To encrypt, something like:

   openssl enc -e -des -in plaintext.txt -a -out encrypted.asc

Decrypt like so:

   openssl enc -d -dex -in encrypted.asc -a -out plaintext.txt

Note: completely untested.  You may well need to supply various extra
arguments to make it all work.  See 'openssl enc help' for hints.

Note 2: DES is pretty trivial to crack nowadays.  Don't use this for
anything serious.  You can encrypt using AES or any of a host of other
ciphers by using a very similar openssl command line.

Note 3: If you're actually after DES encrypted passwords, then see
crypt(3).  From the commandline you can use the Perl crypt function:
'perldoc -f crypt' for details.

Cheers,

Matthew

-- 
Dr Matthew J Seaman MA, D.Phil.   7 Priory Courtyard
  Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matt...@infracaninophile.co.uk   Kent, CT11 9PW



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Re: DES Cipher

2010-12-22 Thread Mohammad Hedayati 
On Wed, Dec 22, 2010 at 6:01 PM, Anton Shterenlikht me...@bristol.ac.uk wrote:
 On Wed, Dec 22, 2010 at 05:50:19PM +0330, Mohammad Hedayati wrote:
 Can anyone please show me a sample code for ciphering using DES in FreeBSD?

 bdes(1)?

 % ls -al  zzz
 % bdes  zzz  zzz.des
 Enter key:
 %

 --
 Anton Shterenlikht
 Room 2.6, Queen's Building
 Mech Eng Dept
 Bristol University
 University Walk, Bristol BS8 1TR, UK
 Tel: +44 (0)117 331 5944
 Fax: +44 (0)117 929 4423


no, des(3)
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Re: DES Cipher

2010-12-22 Thread Mike Tancsa 
On 12/22/2010 9:35 AM, Mohammad Hedayati wrote:
 On Wed, Dec 22, 2010 at 6:01 PM, Anton Shterenlikht me...@bristol.ac.uk 
 wrote:
 On Wed, Dec 22, 2010 at 05:50:19PM +0330, Mohammad Hedayati wrote:
 Can anyone please show me a sample code for ciphering using DES in FreeBSD?

 bdes(1)?

 % ls -al  zzz
 % bdes  zzz  zzz.des
 Enter key:
 %

 
 no, des(3)

/usr/src/crypto/openssl/crypto/des

---Mike




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Re: DES Cipher

2010-12-22 Thread Robert Bonomi 

 From owner-freebsd-questi...@freebsd.org  Wed Dec 22 08:22:15 2010
 From: Mohammad Hedayati hedayati...@gmail.com
 Date: Wed, 22 Dec 2010 17:50:19 +0330
 To: freebsd-questions@freebsd.org
 Subject: DES Cipher

 Can anyone please show me a sample code for ciphering using DES in FreeBSD?

I hate to say it, but RTFM applies.
'apropos encryption' gives, among other things (and first), a cite to bdes(1).

'bdes' is a program that comes with the FreeBSD distribution.
You have access to the source code of all of the distribution.

'Use the Souce, Luke applies, and will bring the mountain to Mohammad. :)


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Re: DES Cipher

2010-12-22 Thread Mohammad Hedayati 
On Wed, Dec 22, 2010 at 7:33 PM, Robert Bonomi bon...@mail.r-bonomi.com wrote:

 From owner-freebsd-questi...@freebsd.org  Wed Dec 22 08:22:15 2010
 From: Mohammad Hedayati hedayati...@gmail.com
 Date: Wed, 22 Dec 2010 17:50:19 +0330
 To: freebsd-questions@freebsd.org
 Subject: DES Cipher

 Can anyone please show me a sample code for ciphering using DES in FreeBSD?

 I hate to say it, but RTFM applies.
 'apropos encryption' gives, among other things (and first), a cite to bdes(1).

 'bdes' is a program that comes with the FreeBSD distribution.
 You have access to the source code of all of the distribution.

 'Use the Souce, Luke applies, and will bring the mountain to Mohammad. :)



Thanks Robert, I haven't seen a cite to bdes in the FM of des(3), but
the problem is solved using the source of bdes(1) [thanks to Antone].
The code would be as easy as:

#include openssl/des.h

int
main(int argc, char *argv[])
{
DES_key_schedule schedule;
DES_cblock key;
strncpy(key, somekey, 8);

DES_set_key(key, schedule);

DES_cblock buf;
strncpy(buf, sometxt, 8);

// Encrypting
DES_ecb_encrypt(buf, buf, schedule, 0);  

// Decrypting
DES_ecb_encrypt(buf, buf, schedule, 1);  
printf(Text Is: %s\n, buf);

return(0);
}
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