Standards, Environments, and Macros                 cryptunix(5)



NAME
     cryptunix - traditional UNIX crypt algorithm

DESCRIPTION
     The cryptunix algorithm is the traditional UNIX crypt algo-
     rithm.  It is not considered sufficiently secure for current
     systems and is provided  for  backwards  compatibility.  The
     cryptsunmd5(5),  cryptbsdmd5(5),  or  cryptbsdbf(5) algo-
     rithm should be used instead.


     The algorithm identifier  for  policy.conf(4)  is  unix.
     There is no entry in crypt.conf(4) for this algorithm.


     The cryptunix algorithm is internal to  libc  and  provides
     the  string  encoding  function  used  by crypt(3C) when the
     first character of the salt is not a "$".


     This algorithm is based on a  one-way  encryption  algorithm
     with  variations  intended (among other things) to frustrate
     use of hardware implementations of a key search.   Only  the
     first eight characters of the key passed to crypt() are used
     with this algorithm; the rest are silently ignored. The salt
     is a two-character string chosen from the set [a-zA-Z0-9./].
     This string is used to perturb the hashing algorithm in  one
     of 4096 different ways.


     The maximum password length for cryptunix is 8 characters.

USAGE
     The return value of the cryptunix algorithm  might  not  be
     portable   among   standard-conforming  systems.  See  stan-
     dards(5).

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     MT-Level                     Safe                        
    


SEE ALSO




SunOS 5.11           Last change: 6 Aug 2003                    1






Standards, Environments, and Macros                 cryptunix(5)



     passwd(1),        crypt(3C),         cryptgenhashimpl(3C),
     cryptgensalt(3C),                   cryptgensaltimpl(3C),
     getpassphrase(3C), crypt.conf(4), passwd(4), policy.conf(4),
     attributes(5),        cryptbsdbf(5),       cryptbsdmd5(5),
     cryptsunmd5(5), standards(5)


















































SunOS 5.11           Last change: 6 Aug 2003                    2