---
name: "gnutls_oprfi_enable_server"
section: "3"
platform: "linux"
package: "gnutls-doc"
version: "2.8.6-1+squeeze3"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_oprfi_enable_server"
---

# gnutls\_oprfi\_enable\_server(3)

API function

## NAME

gnutls\_oprfi\_enable\_server - API function

## SYNOPSIS

**#include \<gnutls/gnutls.h\>**

**void gnutls\_oprfi\_enable\_server(gnutls\_session\_t** *session***, gnutls\_oprfi\_callback\_func** *cb***, void \*** *userdata***);**

## ARGUMENTS

- gnutls\_session\_t session

  is a **gnutls\_session\_t** structure.

- gnutls\_oprfi\_callback\_func cb

  function pointer to Opaque PRF extension server callback.

- void \* userdata

  hook passed to callback function for passing application state.

## DESCRIPTION

Request that the server should attempt to accept the Opaque PRF Input TLS extension.  If the client requests the extension, the provided callback *cb* will be invoked.  The callback must have the following prototype:

int callback (gnutls\_session\_t session, void \*userdata, size\_t oprfi\_len, const unsigned char \*in\_oprfi, unsigned char \*out\_oprfi);

The callback can inspect the client-provided data in the input parameters, and specify its own opaque prf input data in the output variable.  The function must return 0 on success, otherwise the handshake will be aborted.

## REPORTING BUGS

Report bugs to \<bug-gnutls@gnu.org\>. GnuTLS home page: http://www.gnu.org/software/gnutls/ General help using GNU software: http://www.gnu.org/gethelp/

## COPYRIGHT

Copyright © 2008 Free Software Foundation.\
 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.