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 routines are present in libc 4.6.27 and later, and in
glibc 2.1 and later.
BUGS
The prototypes are missing from the abovementioned include file.
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
