NAME

       xencrypt, xdecrypt, passwd2des - RFS password encryption

SYNOPSIS

       #include <rpc/des_crypt.h>

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

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

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

DESCRIPTION

       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.

RETURN VALUE

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

VERSIONS

       These functions are available in glibc since version 2.1.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │passwd2des(), xencrypt(), xdecrypt()  │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

BUGS

       The prototypes are missing from the abovementioned include file.

SEE ALSO

       cbc_crypt(3)

COLOPHON

       This  page  is  part of release 4.15 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at https://www.kernel.org/doc/man-pages/.

                                            2017-09-15                                  XCRYPT(3)