srptool(1) User Commands srptool(1)
NAME
srptool - GnuTLS SRP tool
SYNOPSIS
srptool [-flags] [-flag [value]] [--option-name[[=| ]value]]
All arguments must be options.
DESCRIPTION
Simple program that emulates the programs in the Stanford SRP (Secure
Remote Password) libraries using GnuTLS. It is intended for use in
places where you don't expect SRP authentication to be the used for
system users.
In brief, to use SRP you need to create two files. These are the
password file that holds the users and the verifiers associated with
them and the configuration file to hold the group parameters (called
tpasswd.conf).
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.
-i num, --index=num
This option takes an integer number as its argument. The de-
fault number for this option is:
3
-u str, --username=str
-p str, --passwd=str
-s num, --salt=num
This option takes an integer number as its argument.
--verify
Verifies the password provided against the password file.
-v str, --passwd-conf=str
Specify a filename or a PKCS #11 URL to read the CAs from.
--create-conf=str
Generate a password configuration file.
This generates a password configuration file (tpasswd.conf) con-
taining the required for TLS parameters.
-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 create tpasswd.conf which holds the g and n values for SRP protocol
(generator and a large prime), run:
$ srptool --create-conf /etc/tpasswd.conf
This command will create /etc/tpasswd and will add user 'test' (you
will also be prompted for a password). Verifiers are stored by default
in the way libsrp expects.
$ srptool --passwd /etc/tpasswd --passwd-conf /etc/tpasswd.conf -u test
This command will check against a password. If the password matches the
one in /etc/tpasswd you will get an ok.
$ srptool --passwd /etc/tpasswd --passwd\-conf /etc/tpasswd.conf --verify -u test
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), psktool (1), cert-
tool (1)
AUTHORS
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
3.7.9 09 Feb 2023 srptool(1)
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