NAME
gnutls_x509_crt_get_key_usage - return the certificates 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 certificates 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>.
COPYRIGHT
Copyright © 2008 Free Software Foundation. Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.
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 | |