---
name: "gnutls_x509_trust_list_get_issuer_by_subject_key_id"
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_trust_list_get_issuer_by_subject_key_id"
---

# gnutls\_x509\_trust\_list\_get\_issuer\_by\_subject\_key\_id(3)

API function

## NAME

gnutls\_x509\_trust\_list\_get\_issuer\_by\_subject\_key\_id - API function

## SYNOPSIS

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

**int gnutls\_x509\_trust\_list\_get\_issuer\_by\_subject\_key\_id(gnutls\_x509\_trust\_list\_t** *list***, const gnutls\_datum\_t \*** *dn***, const gnutls\_datum\_t \*** *spki***, gnutls\_x509\_crt\_t \*** *issuer***, unsigned int** *flags***);**

## ARGUMENTS

- gnutls\_x509\_trust\_list\_t list

  The list

- const gnutls\_datum\_t \* dn

  is the issuer's DN (may be **NULL**)

- const gnutls\_datum\_t \* spki

  is the subject key ID

- gnutls\_x509\_crt\_t \* issuer

  Will hold the issuer if any. Should be deallocated after use.

- unsigned int flags

  Use zero

## DESCRIPTION

This function will find the issuer with the given name and subject key ID, and return a copy of the issuer, which must be freed using **gnutls\_x509\_crt\_deinit()**.

## RETURNS

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

## SINCE

3\.4.2

## 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/