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>
gnutls_x509_crt_get_key_usage(3) cert, unsigned int
* key_usage, unsigned int * critical);
ARGUMENTS
gnutls_x509_crt_t cert
should contain a gnutls_x509_crt_t type
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_REPUDIA-
TION, GNUTLS_KEY_KEY_ENCIPHERMENT, GNUTLS_KEY_DATA_ENCIPHERMENT,
GNUTLS_KEY_KEY_AGREEMENT, GNUTLS_KEY_KEY_CERT_SIGN,
GNUTLS_KEY_CRL_SIGN, GNUTLS_KEY_ENCIPHER_ONLY, GNUTLS_KEY_DECI-
PHER_ONLY.
RETURNS
zero on success, or a negative error code in case of parsing error. If
the certificate does not contain the keyUsage extension
GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHT
Copyright (C) 2001-2018 Free Software Foundation, Inc., and others.
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 /usr/share/doc/gnutls/ directory does not contain the HTML form
visit
http://www.gnutls.org/manual/
gnutls 3.6.5 gnutls_x509_crt_get_key_usage(3)
gnutls 3.6.5 - Generated Mon Jan 21 07:44:37 CST 2019