gnutls_x509_crt_get_extension_by_oid - API function

Arguments

gnutls_x509_crt_t cert should contain a gnutls_x509_crt_t type const char * oid holds an Object Identified in null terminated string unsigned indx In case multiple same OIDs exist in the extensions, this specifies which to send. Use (0) to get the first one. void * buf a pointer to a structure to hold the name (may be null) size_t * buf_size initially holds the size of buf unsigned int * critical will be non-zero if the extension is marked as critical

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.

Description

This function will return the extension specified by the OID in the certificate. The extensions will be returned as binary data DER encoded, in the provided buffer.

Name

gnutls_x509_crt_get_extension_by_oid - API function

Reporting Bugs

Report bugs to <bugs@gnutls.org>. Home page: https://www.gnutls.org

Returns

On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned. If the certificate does not contain the specified extension GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.

Synopsis

#include<gnutls/x509.h>intgnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_tcert,constchar*oid,unsignedindx,void*buf,size_t*buf_size,unsignedint*critical);