gnutls_x509_ext_import_key_usage(3)                                     gnutls

NAME
       gnutls_x509_ext_import_key_usage - API function

SYNOPSIS
       #include <gnutls/x509-ext.h>

       int gnutls_x509_ext_import_key_usage(const gnutls_datum_t * ext,
       unsigned int * key_usage);

ARGUMENTS
       const gnutls_datum_t * ext
                   the DER encoded extension data

       unsigned int * key_usage
                   where the key usage bits will be stored

DESCRIPTION
       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.

RETURNS
       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.

SINCE
       3.3.0

REPORTING BUGS
       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org


COPYRIGHT
       Copyright (C) 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.

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/

gnutls                               3.8.5 gnutls_x509_ext_import_key_usage(3)