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psktool(1)			  User Commands 		      psktool(1)

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

     Specifies the debug level.

     -s num, --keysize=num 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 num is constrained to being:
	 in the range 0 through 512

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

     -p str, --pskfile=str 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 arg, --version=arg 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
COPYRIGHT
     Copyright	(C)  2020-2023	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

3.8.13				   29 Apr 2026			      psktool(1)

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