crypt_unix - traditional UNIX crypt algorithm


     The crypt_unix algorithm is the traditional UNIX crypt algo-
     rithm.  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) 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 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 ways.


     The return value of the crypt_unix algorithm  might  not  be
     portable   among   standard-conforming  systems.  See  stan-


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

    |       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)

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