---
name: "gnutls_x509_crt_set_policy"
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_x509_crt_set_policy"
---

# gnutls\_x509\_crt\_set\_policy(3)

API function

## NAME

gnutls\_x509\_crt\_set\_policy - API function

## SYNOPSIS

**#include \<gnutls/x509.h\>**

**int gnutls\_x509\_crt\_set\_policy(gnutls\_x509\_crt\_t** *crt***, const struct gnutls\_x509\_policy\_st \*** *policy***, unsigned int** *critical***);**

## ARGUMENTS

- gnutls\_x509\_crt\_t crt

  should contain a **gnutls\_x509\_crt\_t** type

- const struct gnutls\_x509\_policy\_st \* policy

  A pointer to a policy

- unsigned int critical

  use non-zero if the extension is marked as critical

## DESCRIPTION

This function will set the certificate policy extension (2.5.29.32). Multiple calls to this function append a new policy.

Note the maximum text size for the qualifier **GNUTLS\_X509\_QUALIFIER\_NOTICE** is 200 characters. This function will fail with **GNUTLS\_E\_INVALID\_REQUEST** if this is exceeded.

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error value.

## SINCE

3\.1.5

## 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/