NAME


gnutls_x509_crt_get_key_usage - return the certificate’s 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 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.

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
should give you access to the complete manual.

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