---
name: "gnutls_sign_algorithm_get_requested"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_sign_algorithm_get_requested"
---

# gnutls\_sign\_algorithm\_get\_requested(3)

API function

## NAME

gnutls\_sign\_algorithm\_get\_requested - API function

## SYNOPSIS

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

**int gnutls\_sign\_algorithm\_get\_requested(gnutls\_session\_t** *session***, size\_t** *indx***, gnutls\_sign\_algorithm\_t \*** *algo***);**

## ARGUMENTS

- gnutls\_session\_t session

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

- size\_t indx

  is an index of the signature algorithm to return

- gnutls\_sign\_algorithm\_t \* algo

  the returned certificate type will be stored there

## DESCRIPTION

Returns the signature algorithm specified by index that was requested by the peer. If the specified index has no data available this function returns **GNUTLS\_E\_REQUESTED\_DATA\_NOT\_AVAILABLE**.  If the negotiated TLS version does not support signature algorithms then **GNUTLS\_E\_REQUESTED\_DATA\_NOT\_AVAILABLE** will be returned even for the first index.  The first index is 0.

This function is useful in the certificate callback functions to assist in selecting the correct certificate.

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise an error code is returned.

## SINCE

2\.10.0

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

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.

## SEE ALSO

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/