XCRYPT(3)                  Library Functions Manual                  XCRYPT(3)

NAME
       xencrypt, xdecrypt, passwd2des - RFS password encryption

LIBRARY
       Standard C library (libc, -lc)

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.

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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |passwd2des (), xencrypt (), xdecrypt ()     | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
VERSIONS
       These functions are available since glibc 2.1.

BUGS
       The prototypes are missing from the abovementioned include file.

SEE ALSO
       cbc_crypt(3)

Linux man-pages 6.7               2023-10-31                         XCRYPT(3)