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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | EXIT STATUS | SEE ALSO | AUTHORS | COPYRIGHT | BUGS | COLOPHON |
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srptool(1) User Commands srptool(1)
srptool - GnuTLS SRP tool
srptool [-flags] [-flag [value]] [--option-name[[=| ]value]]
All arguments must be options.
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).
-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 default 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)
containing 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.
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
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.
gnutls-cli-debug(1), gnutls-serv(1), srptool(1),
psktool(1), certtool(1)
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
Please send bug reports to: bugs@gnutls.org
This page is part of the GnuTLS (GnuTLS Transport Layer Security
Library) project. Information about the project can be found at
⟨http://www.gnutls.org/⟩. If you have a bug report for this
manual page, send it to bugs@gnutls.org. This page was obtained
from the tarball fetched from
⟨https://www.gnupg.org/ftp/gcrypt/gnutls/⟩ on 2025-08-11. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for the
page, or you have corrections or improvements to the information
in this COLOPHON (which is not part of the original manual page),
send a mail to man-pages@man7.org
3.8.10 09 Jul 2025 srptool(1)
Pages that refer to this page: certtool(1), psktool(1), srptool(1)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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