gnutls_x509_crt_get_extension_info(3) gnutls gnutls_x509_crt_get_extension_info(3)
NAME
gnutls_x509_crt_get_extension_info - API function
SYNOPSIS
#include <gnutls/x509.h>
int gnutls_x509_crt_get_extension_info(gnutls_x509_crt_t cert, int indx, void * oid, size_t * oid_size, unsigned int * critical);
ARGUMENTS
gnutls_x509_crt_t cert
should contain a gnutls_x509_crt_t structure
int indx Specifies which extension OID to send. Use (0) to get the first one.
void * oid a pointer to a structure to hold the OID
size_t * oid_size
initially holds the maximum size of oid , on return holds actual size of oid .
unsigned int * critical
output variable with critical flag, may be NULL.
DESCRIPTION
This function will return the requested extension OID in the certificate, and the critical flag for it. The extension OID will be stored
as a string in the provided buffer. Use gnutls_x509_crt_get_extension_data() to extract the data.
If the buffer provided is not long enough to hold the output, then
oid_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER will be returned. The oid returned will be null terminated, although
oid_size will not account for the trailing null.
RETURNS
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned. If you have reached the last extension avail-
able GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.
REPORTING BUGS
Report bugs to <bug-gnutls@gnu.org>.
General guidelines for reporting bugs: http://www.gnu.org/gethelp/
GnuTLS home page: http://www.gnu.org/software/gnutls/
COPYRIGHT
Copyright (C) 2012 Free Software Foundation, Inc..
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 info and gnutls programs are properly installed at your site,
the command
info gnutls
should give you access to the complete manual. As an alternative you may obtain the manual from:
http://www.gnu.org/software/gnutls/manual/
gnutls 3.1.15 gnutls_x509_crt_get_extension_info(3)