NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON
gnutls_x509_crt_get_key_usage(3) gnutls gnutls_x509_crt_get_key_usage(3)
gnutls_x509_crt_get_key_usage - API function
#include <gnutls/x509.h> int gnutls_x509_crt_get_key_usage(gnutls_x509_crt_t cert, unsigned int * key_usage, unsigned int * critical);
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
This function will return certificate's key usage, by reading the keyUsage X.509 extension (18.104.22.168). 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.
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.
Report bugs to <email@example.com>. Home page: https://www.gnutls.org
Copyright © 2001- 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/
This page is part of the GnuTLS (GnuTLS Transport Layer Security Library) project. Information about the project can be found at ⟨http://www.gnutls.org/⟩. If you have a bug report for this manual page, send it to firstname.lastname@example.org. This page was obtained from the tarball gnutls-3.7.8.tar.xz fetched from ⟨http://www.gnutls.org/download.html⟩ on 2022-12-17. If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com gnutls 3.7.8 gnutls_x509_crt_get_key_usage(3)