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OpenSolaris 2009.06 - man page for crypt_unix (opensolaris section 5)

crypt_unix(5)		       Standards, Environments, and Macros		    crypt_unix(5)

       crypt_unix - traditional UNIX crypt algorithm

       The  crypt_unix	algorithm  is  the traditional UNIX crypt algorithm. It is not considered
       sufficiently secure for current systems and is provided for backwards  compatibility.  The
       crypt_sunmd5(5), crypt_bsdmd5(5), or crypt_bsdbf(5) algorithm 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 crypt_unix 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

       The maximum password length for crypt_unix is 8 characters.

       The return value of the crypt_unix algorithm might not be portable among standard-conform-
       ing systems. See standards(5).

       See attributes(5) for descriptions of the following attributes:

       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |MT-Level		     |Safe			   |

       passwd(1),  crypt(3C),  crypt_genhash_impl(3C), crypt_gensalt(3C), crypt_gensalt_impl(3C),
       getpassphrase(3C),    crypt.conf(4),	passwd(4),     policy.conf(4),	   attributes(5),
       crypt_bsdbf(5), crypt_bsdmd5(5), crypt_sunmd5(5), standards(5)

SunOS 5.11				    6 Aug 2003				    crypt_unix(5)

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