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NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
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gnutls_srp_se...ials_function(3) gnutls gnutls_srp_se...ials_function(3)
gnutls_srp_set_server_credentials_function - API function
#include <gnutls/gnutls.h>
void
gnutls_srp_set_server_credentials_function(gnutls_srp_server_credentials_t
cred, gnutls_srp_server_credentials_function * func);
gnutls_srp_server_credentials_t cred
is a gnutls_srp_server_credentials_t type.
gnutls_srp_server_credentials_function * func
is the callback function
This function can be used to set a callback to retrieve the user's
SRP credentials. The callback's function form is:
int (*callback)(gnutls_session_t, const char* username,
gnutls_datum_t *salt, gnutls_datum_t *verifier, gnutls_datum_t
*generator, gnutls_datum_t *prime);
username contains the actual username. The salt , verifier ,
generator and prime must be filled in using the gnutls_malloc().
For convenience prime and generator may also be one of the
static parameters defined in gnutls.h.
Initially, the data field is NULL in every gnutls_datum_t
structure that the callback has to fill in. When the callback is
done GnuTLS deallocates all of those buffers which are non-NULL,
regardless of the return value.
In order to prevent attackers from guessing valid usernames, if a
user does not exist, g and n values should be filled in using a
random user's parameters. In that case the callback must return
the special value (1). See gnutls_srp_set_server_fake_salt_seed
too. If this is not required for your application, return a
negative number from the callback to abort the handshake.
The callback function will only be called once per handshake. The
callback function should return 0 on success, while -1 indicates
an error.
Report bugs to <[email protected]>.
Home page: https://www.gnutls.org
Copyright © 2001-2023 Free Software Foundation, Inc., and others.
Copying and distribution of this file, with or without
modification, are permitted in any medium without royalty provided
the copyright notice and this notice are preserved.
The full documentation for gnutls is maintained as a Texinfo
manual. If the /usr/share/doc/gnutls/ directory does not contain
the HTML form visit
https://www.gnutls.org/manual/
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 [email protected]. 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 [email protected]
gnutls 3.8.10 gnutls_srp_se...ials_function(3)
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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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