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XCRYPT(3)                  Linux Programmer's Manual                 XCRYPT(3)

       xencrypt, xdecrypt, passwd2des - RFS password encryption

       #include <rpc/des_crypt.h>

       void passwd2des(char *passwd, char *key);

       int xencrypt(char *secret, char *passwd);

       int xdecrypt(char *secret, char *passwd);

       The  function passwd2des() takes a character string passwd of arbitrary
       length and fills a character array key of length 8.  The array  key  is
       suitable  for  use  as DES key.  It has odd parity set in bit 0 of each
       byte.  Both other functions described here use this  function  to  turn
       their argument passwd into a DES key.

       The  xencrypt()  function takes the ASCII character string secret given
       in hex, which must have a length that is a multiple of 16, encrypts  it
       using  the DES key derived from passwd by passwd2des(), and outputs the
       result again in secret as a hex string of the same length.

       The xdecrypt() function performs the converse operation.

       The functions xencrypt() and xdecrypt() return 1 on success  and  0  on

       These  routines  are present in libc 4.6.27 and later, and in glibc 2.1
       and later.

       The prototypes are missing from the abovementioned include file.


       This page is part of release 3.05 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at

                                  2003-04-04                         XCRYPT(3)

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