centos man page for gnutls_x509_crt_get_key_purpose_oid

gnutls_x509_crt_get_key_purpose_oid(3)				      gnutls				    gnutls_x509_crt_get_key_purpose_oid(3)

NAME
       gnutls_x509_crt_get_key_purpose_oid - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_key_purpose_oid(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    This specifies which OID to return. Use (0) to get the first one.

       void * oid  a pointer to a buffer to hold the OID (may be null)

       size_t * oid_size
		   initially holds the size of	oid

       unsigned int * critical
		   output flag to indicate criticality of extension

DESCRIPTION
       This  function  will  extract  the  key purpose OIDs of the Certificate specified by the given index.  These are stored in the Extended Key
       Usage extension (2.5.29.37) See the GNUTLS_KP_* definitions for human readable names.

       If  oid is null then only the size will be filled. The  oid returned will be null terminated, although  oid_size will not account  for  the
       trailing null.

RETURNS
       GNUTLS_E_SHORT_MEMORY_BUFFER  if  the  provided buffer is not long enough, and in that case the *oid_size will be updated with the required
       size.  On success 0 is 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_key_purpose_oid(3)