gnutls_x509_crt_get_key_purpose_oid man page on FreeBSD

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       gnutls_x509_crt_get_key_purpose_oid  -  This  function returns the Cer‐
       tificate's key purpose OIDs

       #include <gnutls/x509.h>

       int  gnutls_x509_crt_get_key_purpose_oid(gnutls_x509_crt_t  cert,   int
       indx, void * oid, size_t * sizeof_oid, unsigned int * critical);

       gnutls_x509_crt_t cert
		   should contain a gnutls_x509_crt_t structure

       int indx	   This	 specifies  which  OID	to return. Use zero to get the
		   first one.

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

       size_t * sizeof_oid
		   initially holds the size of oid

       unsigned int * critical
		   output flag to indicate criticality of extension

       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 ( See the GNUTLS_KP_* definitions  for	 human
       readable names.

       If oid is null then only the size will be filled.

       GNUTLS_E_SHORT_MEMORY_BUFFER if the provided buffer is not long enough,
       and in that case the *sizeof_oid will  be  updated  with	 the  required
       size.  On success 0 is returned.

       Report	 bugs	 to    <>.	 GnuTLS	  home	 page: General help	 using	GNU  software:

       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.

       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				     2.8gnutls_x509_crt_get_key_purpose_oid(3)

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