gnutls\_x509\_crt\_set\_subject\_alternative\_name(3) gnutls gnutls\_x509\_crt\_set\_subject\_alternative\_name(3)

# [NAME](#NAME)

gnutls\_x509\_crt\_set\_subject\_alternative\_name - API function

# [SYNOPSIS](#SYNOPSIS)

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

**int gnutls\_x509\_crt\_set\_subject\_alternative\_name(gnutls\_x509\_crt\_t crt, gnutls\_x509\_subject\_alt\_name\_t type, const char * data\_string);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_x509\_crt\_t crt](#gnutls_x509_crt_t)

a certificate of type **gnutls\_x509\_crt\_t**

[gnutls\_x509\_subject\_alt\_name\_t type](#gnutls_x509_subject_alt_name_t)

is one of the gnutls\_x509\_subject\_alt\_name\_t enumerations

[const char * data\_string](#const)

The data to be set, a (0) terminated string

# [DESCRIPTION](#DESCRIPTION)

This function will set the subject alternative name certificate extension. This function assumes that data can be expressed as a null terminated string.

The name of the function is unfortunate since it is inconsistent with **gnutls\_x509\_crt\_get\_subject\_alt\_name()**.

See **gnutls\_x509\_crt\_set\_subject\_alt\_name()** for more information.

# [RETURNS](#RETURNS)

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

# [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_x509_crt_set_subject_alternative_name(3) from gnutls 3.8.13-r1 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls