xdecrypt(3)

RFS password encryption

distropkg manpages-dev@6.9.1-1dataset 2026-04-01T06:19:02Z+debian+ec4110e+mandoc:1.14.6-4

Synopsis

#include <rpc/des_crypt.h>
void passwd2des(char 
*passwd
, char *
key
);
int xencrypt(char *
secret
, char *
passwd
);
int xdecrypt(char *
secret
, char *
passwd
);

—

NAME

xencrypt, xdecrypt, passwd2des - RFS password encryption

SYNOPSIS

bash

#include <rpc/des_crypt.h>

bash

void passwd2des(char \n*passwd\n, char *\nkey\n);

bash

int xencrypt(char *\nsecret\n, char *\npasswd\n);\n
\nint xdecrypt(char *\nsecret\n, char *\npasswd\n);

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.