---
name: "gnutls_x509_crq_get_subject_alt_name"
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_crq_get_subject_alt_name"
---

# gnutls\_x509\_crq\_get\_subject\_alt\_name(3)

API function

## NAME

gnutls\_x509\_crq\_get\_subject\_alt\_name - API function

## SYNOPSIS

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

**int gnutls\_x509\_crq\_get\_subject\_alt\_name(gnutls\_x509\_crq\_t** *crq***, unsigned int** *seq***, void \*** *ret***, size\_t \*** *ret\_size***, unsigned int \*** *ret\_type***, unsigned int \*** *critical***);**

## ARGUMENTS

- gnutls\_x509\_crq\_t crq

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

- unsigned int seq

  specifies the sequence number of the alt name, 0 for the first one, 1 for the second etc.

- void \* ret

  is the place where the alternative name will be copied to

- size\_t \* ret\_size

  holds the size of ret.

- unsigned int \* ret\_type

  holds the **gnutls\_x509\_subject\_alt\_name\_t** name type

- unsigned int \* critical

  will be non-zero if the extension is marked as critical (may be null)

## DESCRIPTION

This function will return the alternative names, contained in the given certificate.  It is the same as **gnutls\_x509\_crq\_get\_subject\_alt\_name()** except for the fact that it will return the type of the alternative name in  *ret\_type* even if the function fails for some reason (i.e.  the buffer provided is not enough).

## RETURNS

the alternative subject name type on success, one of the enumerated **gnutls\_x509\_subject\_alt\_name\_t**.  It will return **GNUTLS\_E\_SHORT\_MEMORY\_BUFFER** if  *ret\_size* is not large enough to hold the value.  In that case  *ret\_size* will be updated with the required size.  If the certificate request does not have an Alternative name with the specified sequence number then **GNUTLS\_E\_REQUESTED\_DATA\_NOT\_AVAILABLE** is returned.

## SINCE

2\.8.0

## 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/