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)