gnutls\_x509\_trust\_list\_get\_issuer(3) gnutls gnutls\_x509\_trust\_list\_get\_issuer(3)

# [NAME](#NAME)

gnutls\_x509\_trust\_list\_get\_issuer - API function

# [SYNOPSIS](#SYNOPSIS)

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

**int gnutls\_x509\_trust\_list\_get\_issuer(gnutls\_x509\_trust\_list\_t list, gnutls\_x509\_crt\_t cert, gnutls\_x509\_crt\_t * issuer, unsigned int flags);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_x509\_trust\_list\_t list](#gnutls_x509_trust_list_t)

The list

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

is the certificate to find issuer for

[gnutls\_x509\_crt\_t * issuer](#gnutls_x509_crt_t~2)

Will hold the issuer if any. Should be treated as constant unless **GNUTLS\_TL\_GET\_COPY** is set in *flags* .

[unsigned int flags](#unsigned)

flags from **gnutls\_trust\_list\_flags\_t** (**GNUTLS\_TL\_GET\_COPY** is applicable)

# [DESCRIPTION](#DESCRIPTION)

This function will find the issuer of the given certificate. If the flag **GNUTLS\_TL\_GET\_COPY** is specified a copy of the issuer will be returned which must be freed using **gnutls\_x509\_crt\_deinit()**. In that case the provided *issuer* must not be initialized.

Note that the flag **GNUTLS\_TL\_GET\_COPY** is required for this function to work with PKCS**11** trust lists in a thread-safe way.

# [RETURNS](#RETURNS)

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

# [SINCE](#SINCE)

3.0

# [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_trust_list_get_issuer(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls