gnutls_x509_ext_import_key_usage − API function
#include <gnutls/x509-ext.h>
int gnutls_x509_ext_import_key_usage(const gnutls_datum_t * ext, unsigned int * key_usage);
const gnutls_datum_t * ext
the DER encoded extension data
unsigned int * key_usage
where the key usage bits will be stored
This function will return certificate’s key usage, by reading the DER data of 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.
the certificate key usage, 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.
3.3.0
Report bugs to
<[email protected]>.
Home page: https://www.gnutls.org
Copyright ©
2001-2023 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.
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
https://www.gnutls.org/manual/