centos man page for gnutls_x509_crt_get_extension_info

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)