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crypt_unix(7)

cr...x(7)Standards, Environments, Macros, Character Sets, and miscellancyr...x(7)

NAME
       crypt_unix - traditional UNIX crypt algorithm

DESCRIPTION
       The crypt_unix algorithm is the traditional UNIX crypt algorithm. It is
       not  considered sufficiently secure for current systems and is provided
       for backward compatibility. The  crypt_sha512(7),  crypt_sha256(7),  or
       crypt_bsdbf(7) algorithm should be used instead.


       The  algorithm  identifier  for policy.conf(5) is __unix__. There is no
       entry in crypt.conf(5) 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  varia‐
       tions intended (among other things) to frustrate use of hardware imple‐
       mentations  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 crypt_unix is 8 characters.

USAGE
       The return value of the crypt_unix  algorithm  might  not  be  portable
       among standard-conforming systems. See standards(7).

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Availabilitysystem/library _ Interface StabilityCommit‐
       ted


SEE ALSO
       passwd(1), crypt_gensalt(3C), getpassphrase(3C), crypt(3C),  crypt_gen‐
       hash_impl(3C),  crypt_gensalt_impl(3C),  crypt.conf(5), passwd(5), pol‐
       icy.conf(5),    attributes(7),     crypt_bsdbf(7),     crypt_sha256(7),
       crypt_sha512(7), standards(7)

HISTORY
       This  algorithm has been included in all releases of SunOS and Solaris.
       It was the only algorithm supported by the crypt() function until  sup‐
       port  for  pluggable  crypt  modules  was added to Solaris in Solaris 9
       12/02 (Update 2). It was the CRYPT_DEFAULT setting in  policy.conf  be‐
       fore Solaris 11.0.

Oracle Solaris 11.4               21 Jun 2021                        cr...x(7)
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