centos man page for gnutls_x509_crt_get_extension_by_oid

gnutls_x509_crt_get_extension_by_oid(3) 			      gnutls				   gnutls_x509_crt_get_extension_by_oid(3)

NAME
       gnutls_x509_crt_get_extension_by_oid - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int  gnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_t cert, const char * oid, int indx, void * buf, size_t * buf_size, unsigned int *
       critical);

ARGUMENTS
       gnutls_x509_crt_t cert
		   should contain a gnutls_x509_crt_t structure

       const char * oid
		   holds an Object Identified in null terminated string

       int 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

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.

RETURNS
       On  success,  GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned. If the certificate does not contain the speci-
       fied extension 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_by_oid(3)