Функции API (API function)
Имя (Name)
gnutls_x509_crt_get_key_usage - API function
Синопсис (Synopsis)
#include <gnutls/x509.h>
int gnutls_x509_crt_get_key_usage(gnutls_x509_crt_t cert,
unsigned int * key_usage, unsigned int * critical);
Аргументы (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
Описание (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.
Возвращаемое значение (Return value)
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.
Сообщение об ошибках (Reporting bugs)
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
Смотри также (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
https://www.gnutls.org/manual/
