gnutls\_certificate\_set\_x509\_trust(3) gnutls gnutls\_certificate\_set\_x509\_trust(3)

# [NAME](#NAME)

gnutls\_certificate\_set\_x509\_trust - API function

# [SYNOPSIS](#SYNOPSIS)

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

**int gnutls\_certificate\_set\_x509\_trust(gnutls\_certificate\_credentials\_t res, gnutls\_x509\_crt\_t * ca\_list, int ca\_list\_size);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_certificate\_credentials\_t res](#gnutls_certificate_credentials_t)

is a **gnutls\_certificate\_credentials\_t** type.

[gnutls\_x509\_crt\_t * ca\_list](#gnutls_x509_crt_t)

is a list of trusted CAs

[int ca\_list\_size](#int)

holds the size of the CA list

# [DESCRIPTION](#DESCRIPTION)

This function adds the trusted CAs in order to verify client or server certificates. In case of a client this is not required to be called if the certificates are not verified using **gnutls\_certificate\_verify\_peers2()**. This function may be called multiple times.

In case of a server the CAs set here will be sent to the client if a certificate request is sent. This can be disabled using **gnutls\_certificate\_send\_x509\_rdn\_sequence()**.

# [RETURNS](#RETURNS)

the number of certificates processed or a negative error code on error.

# [SINCE](#SINCE)

2.4.0

# [REPORTING BUGS](#REPORTING_BUGS)

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

# [COPYRIGHT](#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](#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/](https://www.gnutls.org/manual/)

3.8.13 gnutls

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Document: gnutls_certificate_set_x509_trust(3) from gnutls 3.8.13-r1 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls