gnutls_x509_crt_get_key_usage

Section: gnutls (3)
Updated: 2.8.5
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NAME

gnutls_x509_crt_get_key_usage - return the certificate's key usage

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_ENCIPHER_ONLY, GNUTLS_KEY_DECIPHER_ONLY.

RETURNS

the certificate key usage, or a negative value 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 <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.