srptool(1)

1srptool(1)                       User Commands                      srptool(1)
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NAME

6       srptool - GnuTLS SRP tool
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SYNOPSIS

9       srptool [-flags] [-flag [value]] [--option-name[[=| ]value]]
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11       All arguments must be options.
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DESCRIPTION

14       Simple  program  that emulates the programs in the Stanford SRP (Secure
15       Remote Password) libraries using GnuTLS.  It is  intended  for  use  in
16       places  where  you  don't  expect SRP authentication to be the used for
17       system users.
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19       In  brief,  to use SRP you need to create  two  files.  These  are  the
20       password  file  that  holds the users and the verifiers associated with
21       them  and  the configuration file to hold the group parameters  (called
22       tpasswd.conf).
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OPTIONS

26       -d num, --debug=num
27              Enable  debugging.   This  option takes an integer number as its
28              argument.  The value of num is constrained to being:
29                  in the range 0 through 9999
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31              Specifies the debug level.
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33       -i num, --index=num
34              This option takes an integer number as its argument.
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36       -u str, --username=str
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38       -p str, --passwd=str
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40       -s num, --salt=num
41              This option takes an integer number as its argument.
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43       --verify
44              Verifies the password provided against the password file.
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46       -v str, --passwd-conf=str
47              Specify a filename or a PKCS #11 URL to read the CAs from.
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49       --create-conf=str
50              Generate a password configuration file.
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52              This generates a password configuration file (tpasswd.conf) con‐
53              taining the required for TLS parameters.
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55       -v arg, --version=arg
56              Output version of program and exit.  The default mode is `v', a
57              simple version.  The `c' mode will print copyright information
58              and `n' will print the full copyright notice.
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60       -h, --help
61              Display usage information and exit.
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63       -!, --more-help
64              Pass the extended usage information through a pager.
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EXAMPLES

69       To create tpasswd.conf which holds the g and n values for SRP protocol
70       (generator and a large prime), run:
71           $ srptool --create-conf /etc/tpasswd.conf
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73       This command will create /etc/tpasswd and will add user 'test' (you
74       will also be prompted for a password). Verifiers are stored by default
75       in the way libsrp expects.
76           $ srptool --passwd /etc/tpasswd --passwd-conf /etc/tpasswd.conf -u test
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79       This command will check against a password. If the password matches the
80       one in /etc/tpasswd you will get an ok.
81           $ srptool --passwd /etc/tpasswd --passwd\-conf /etc/tpasswd.conf --verify -u test
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EXIT STATUS

84       One of the following exit values will be returned:
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86       0  (EXIT_SUCCESS)
87              Successful program execution.
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89       1  (EXIT_FAILURE)
90              The operation failed or the command syntax was not valid.
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AUTHORS

COPYRIGHT

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

103       Please send bug reports to: bugs@gnutls.org
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1073.7.6                             27 May 2022                       srptool(1)