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

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)

                                                                               2021-03-22                                                                      XCRYPT(3)