gnutls_x509_crt_get_extension_info man page on FreeBSD

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gnutls_x509_crt_get_extension_info(3gnutlgnutls_x509_crt_get_extension_info(3)

NAME
       gnutls_x509_crt_get_extension_info - Get extension id and criticality

SYNOPSIS
       #include <gnutls/x509.h>

       int   gnutls_x509_crt_get_extension_info(gnutls_x509_crt_t   cert,  int
       indx, void * oid, size_t * sizeof_oid, 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 zero to get  the
		   first one.

       void * oid  a pointer to a structure to hold the OID

       size_t * sizeof_oid
		   initially  holds  the  maximum size of oid, on return holds
		   actual size of oid.

       int * critical
		   output variable with critical flag, may be NULL.

DESCRIPTION
       This function will return the requested extension OID in	 the  certifi‐
       cate,  and  the critical flag for it.  The extension OID will be stored
       as a string in the  provided  buffer.   Use  gnutls_x509_crt_get_exten‐
       sion_data() to extract the data.

       If  the	buffer	provided  is  not long enough to hold the output, then
       *sizeof_oid  is	updated	 and  GNUTLS_E_SHORT_MEMORY_BUFFER   will   be
       returned.

RETURNS
       On  success,  GNUTLS_E_SUCCESS  (zero)  is returned, otherwise an error
       code is returned.  If you have reached  the  last  extension  available
       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.

REPORTING BUGS
       Report	 bugs	 to    <bug-gnutls@gnu.org>.	 GnuTLS	  home	 page:
       http://www.gnu.org/software/gnutls/ General help	 using	GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT
       Copyright © 2008 Free Software Foundation.
       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.

gnutls				     2.8.gnutls_x509_crt_get_extension_info(3)
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