`gnutls_x509_crt_get_key_usage` ( 3 )

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/

Исходный текст на man7.org

gnutls_x509_crt_get_key_usage ( 3 )