setkey(3C)						   Standard C Library Functions 						setkey(3C)

NAME

       setkey - set encoding key

SYNOPSIS

       #include <stdlib.h>

       void setkey(const char *key);

DESCRIPTION

       The  setkey()  function	provides  (rather  primitive)  access to the hashing algorithm employed by the crypt(3C) function. The argument of
       setkey() is an array of length 64 bytes containing only the bytes with numerical value of 0 and 1. If this string is divided into groups of
       8,  the	low-order  bit in each group is ignored; this gives a 56-bit key which is used by the algorithm. This is the key that will be used
       with the algorithm to encode a string block passed to encrypt(3C).

RETURN VALUES

       No values are returned.

ERRORS

       The setkey() function will fail if:

       ENOSYS	       The functionality is not supported on this implementation.

USAGE

       In some environments, decoding may not be implemented.  This is related to U.S. Government restrictions on encryption and  decryption  rou-
       tines:  the  DES decryption algorithm cannot be exported outside the U.S.A. Historical practice has been to ship a different version of the
       encryption library without the decryption feature in the routines supplied. Thus the exported version of encrypt() does	encoding  but  not
       decoding.

       Because	setkey()  does	not return a value, applications wishing to check for errors should set errno to 0, call setkey(), then test errno
       and, if it is non-zero, assume an error has occurred.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       crypt(3C), encrypt(3C), attributes(5), standards(5)

SunOS 5.10							    14 Aug 2002 							setkey(3C)