NAME

       psktool - GnuTLS PSK tool

SYNOPSIS

       psktool [-flags] [-flag [value]] [--option-name[[=| ]value]]

       All arguments must be options.

DESCRIPTION

       Program   that  generates  random  keys  for  use  with  TLS-PSK.  The  keys are stored in
       hexadecimal format in a key file.

OPTIONS

       -d number, --debug=number
              Enable debugging.  This option takes an integer number as its argument.  The  value
              of number is constrained to being:
                  in the range 0  through  9999

              Specifies the debug level.

       -s number, --keysize=number
              Specify the key size in bytes (default is 32-bytes or 256-bits).  This option takes
              an integer number as its argument.  The value of number is constrained to being:
                  in the range 0  through  512

       -u string, --username=string
              Specify the username to use.

       -p string, --pskfile=string
              Specify a pre-shared key file.

              This option will specify the pre-shared key file to store the generated keys.

       --passwd
              This is an alias for the --pskfile option.

              NOTE: THIS OPTION IS DEPRECATED

       -v keyword, --version=keyword
              Output version of program and exit.  The default mode is `v', a simple version.
              The `c' mode will print copyright information and `n' will print the full copyright
              notice.

       -h, --help
              Display usage information and exit.

       -!, --more-help
              Pass the extended usage information through a pager.

EXAMPLES

       To add a user 'psk_identity' in keys.psk for use with GnuTLS run:
           $ ./psktool -u psk_identity -p keys.psk
           Generating a random key for user 'psk_identity'
           Key stored to keys.psk
           $ cat keys.psk
           psk_identity:88f3824b3e5659f52d00e959bacab954b6540344
           $

       This command will create keys.psk if it does not exist and will add user 'psk_identity'.

EXIT STATUS

       One of the following exit values will be returned:

       0  (EXIT_SUCCESS)
              Successful program execution.

       1  (EXIT_FAILURE)
              The operation failed or the command syntax was not valid.

SEE ALSO

       gnutls-cli-debug (1), gnutls-serv (1), srptool (1), certtool (1)

AUTHORS

       Nikos Mavrogiannopoulos, Simon Josefsson and others; see /usr/share/doc/gnutls/AUTHORS for
       a complete list.

COPYRIGHT

       Copyright (C) 2020-2021 Free Software Foundation, and others all rights reserved.  This
       program is released under the terms of the GNU General Public License, version 3 or later.

BUGS

       Please send bug reports to: bugs@gnutls.org