MCOOKIE

MCOOKIE

NAME SYNOPSIS DESCRIPTION BUGS FILES SEE ALSO

NAME

mcookie - generate magic cookies for xauth

SYNOPSIS

mcookie [-v [unrenderable node]

DESCRIPTION

mcookie generates a 128-bit random hexadecimal number for use with the X authority system. Typical usage:

xauth add :0 . `mcookie`

The

• f__ is specified), and several bytes of information

from the first of the following devices which is present: /dev/random, /dev/urandom, files in /proc, /dev/audio.

BUGS

The entropy in the generated 128-bit is probably quite small (and, therefore, vulnerable to attack) unless a non-pseudorandom number generator is used (e.g., /dev/random under Linux).

It is assumed that none of the devices opened will block.

FILES

/dev/random /dev/urandom /dev/audio /proc/stat /proc/loadavg

SEE ALSO

X(1), xauth(1), __md5sum__(1)