gnutls_x509_crt_get_extension_data(3)

gnutls_x509_crt_get_extension_data3

Api function

Usage

#include <gnutls/x509.h>

int gnutls_x509_crt_get_extension_data(gnutls_x509_crt_t cert, unsigned indx, void * data, size_t * sizeof_data);

Arguments

gnutls_x509_crt_t cert

should contain a gnutls_x509_crt_t type

unsigned indx

Specifies which extension OID to send. Use (0) to get the first one.

void * data

a pointer to a structure to hold the data (may be null)

size_t * sizeof_data

initially holds the size of data

Overview

This function will return the requested extension data in the certificate. The extension data will be stored in the provided buffer.

Use gnutls_x509_crt_get_extension_info() to extract the OID and critical flag. Use gnutls_x509_crt_get_extension_by_oid() instead, if you want to get data indexed by the extension OID rather than sequence.

Returns

On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned. If you have reached the last extension available GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.

Releases

9 releases since Debian 5.0 (Lenny); the text changed 8 times.

  1. 5.0
  2. 6.0
  3. 8
  4. 9
  5. 10
  6. 11
  7. 12
  8. 13
  9. Arch

Reporting bugs

Report bugs to <[email protected]>.
Home page: https://www.gnutls.org

From gnutls 3.8.13-3 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.