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mcookie (1)
  • >> mcookie (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
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    NAME

    mcookie - generate magic cookies for xauth
     
    

    SYNOPSIS

    mcookie [-v] [-f filename ]  

    DESCRIPTION

    mcookie generates a 128-bit random hexadecimal number for use with the X authority system. Typical usage:
    xauth add :0 . `mcookie`

    The "random" number generated is actually the output of the MD5 message digest fed with various piece of random information: the current time, the process id, the parent process id, the contents of an input file (if -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)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    BUGS
    FILES
    SEE ALSO


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