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CentOS 7.0 - man page for gnutls_x509_crt_get_extension_by_oid (centos section 3)

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	   specified	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  man-
       ual from:

	      http://www.gnu.org/software/gnutls/manual/

gnutls					      3.1.15	  gnutls_x509_crt_get_extension_by_oid(3)


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