takes a character string
of arbitrary length and fills a character array
of length 8.
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
into a DES key.
function takes the ASCII character string
given in hex,
which must have a length that is a multiple of 16,
encrypts it using the DES key derived from
and outputs the result again in
as a hex string
of the same length.
function performs the converse operation.
return 1 on success and 0 on error.
These routines are present in libc 4.6.27 and later, and in
glibc 2.1 and later.
The prototypes are missing from the abovementioned include file.