gnutls_srp_set_server_credentials_function man page on Cygwin

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gnutls_srp_set_server_credentialsgnutls_srp_set_server_credentials_function(3)

NAME
       gnutls_srp_set_server_credentials_function - API function

SYNOPSIS
       #include <gnutls/gnutls.h>

       void  gnutls_srp_set_server_credentials_function(gnutls_srp_server_cre‐
       dentials_t							 cred,
       gnutls_srp_server_credentials_function
       * func);

ARGUMENTS
       gnutls_srp_server_credentials_t
       cred
		   is a gnutls_srp_server_credentials_t structure.

       gnutls_srp_server_credentials_function
       * func
		   is the callback function

DESCRIPTION
       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* g, gnutls_datum_t* n);

	username contains the actual username.	The  salt ,  verifier ,	  gen‐
       erator and  prime must be filled in using the gnutls_malloc(). For con‐
       venience	 prime and  generator may also be one of the static parameters
       defined in gnutls.h.

       In case the callback returned a negative number then gnutls will assume
       that the username does not exist.

       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).

       The  callback  function	will  only  be called once per handshake.  The
       callback function should return 0 on success,  while  -1	 indicates  an
       error.

REPORTING BUGS
       Report bugs to <bug-gnutls@gnu.org>.
       General guidelines for reporting bugs: http://www.gnu.org/gethelp/
       GnuTLS home page: http://www.gnu.org/software/gnutls/

COPYRIGHT
       Copyright © 2001-2013 Free Software Foundation, Inc..
       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.

SEE ALSO
       The  full  documentation	 for gnutls is maintained as a Texinfo manual.
       If the info and gnutls programs are properly installed  at  your	 site,
       the command

	      info gnutls

       should  give  you access to the complete manual.	 As an alternative you
       may obtain the manual from:

	      http://www.gnu.org/software/gnutls/manual/

gnutls				 gnutls_srp_set_server_credentials_function(3)
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