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

       WARNING:  Do  not  use  these  functions  in  new  code.  They  do not achieve any type of
       acceptable cryptographic security guarantees.

       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 5.05 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/.

                                            2019-03-06                                  XCRYPT(3)