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XCRYPT

Section: C Library Functions (3)
Updated: 202-0-08
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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	M-Safe

VERSIONS

These functions are available since glibc 2.1.

BUGS

The prototypes are missing from the abovementioned include file.