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gnutls_x509_crt_get_key_usage(3)	      gnutls		 gnutls_x509_crt_get_key_usage(3)

NAME
       gnutls_x509_crt_get_key_usage - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int   gnutls_x509_crt_get_key_usage(gnutls_x509_crt_t  cert,  unsigned  int  *  key_usage,
       unsigned int * critical);

ARGUMENTS
       gnutls_x509_crt_t cert
		   should contain a gnutls_x509_crt_t structure

       unsigned int * key_usage
		   where the key usage bits will be stored

       unsigned int * critical
		   will be non-zero if the extension is marked as critical

DESCRIPTION
       This function will return certificate's key usage, by reading the keyUsage X.509 extension
       (2.5.29.15).  The  key  usage value will ORed values of the: GNUTLS_KEY_DIGITAL_SIGNATURE,
       GNUTLS_KEY_NON_REPUDIATION,   GNUTLS_KEY_KEY_ENCIPHERMENT,   GNUTLS_KEY_DATA_ENCIPHERMENT,
       GNUTLS_KEY_KEY_AGREEMENT,  GNUTLS_KEY_KEY_CERT_SIGN, GNUTLS_KEY_CRL_SIGN, GNUTLS_KEY_ENCI-
       PHER_ONLY, GNUTLS_KEY_DECIPHER_ONLY.

RETURNS
       the certificate key usage, or a negative error code in case of parsing error.  If the cer-
       tificate  does  not  contain  the keyUsage 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_key_usage(3)
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