---
name: "gnutls_x509_crl_get_crt_serial"
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_crl_get_crt_serial"
---

# gnutls\_x509\_crl\_get\_crt\_serial(3)

API function

## NAME

gnutls\_x509\_crl\_get\_crt\_serial - API function

## SYNOPSIS

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

**int gnutls\_x509\_crl\_get\_crt\_serial(gnutls\_x509\_crl\_t** *crl***, unsigned** *indx***, unsigned char \*** *serial***, size\_t \*** *serial\_size***, time\_t \*** *t***);**

## ARGUMENTS

- gnutls\_x509\_crl\_t crl

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

- unsigned indx

  the index of the certificate to extract (starting from 0)

- unsigned char \* serial

  where the serial number will be copied

- size\_t \* serial\_size

  initially holds the size of serial

- time\_t \* t

  if non null, will hold the time this certificate was revoked

## DESCRIPTION

This function will retrieve the serial number of the specified, by the index, revoked certificate.

Note that this function will have performance issues in large sequences of revoked certificates. In that case use **gnutls\_x509\_crl\_iter\_crt\_serial()**.

## RETURNS

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

## 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/