.\" DO NOT MODIFY THIS FILE!  It was generated by gdoc.

.TH "gnutls_x509_crt_get_key_usage" 3 "3.6.2" "gnutls" "gnutls"

.SH NAME

gnutls_x509_crt_get_key_usage \- API function

.SH SYNOPSIS

.B #include <gnutls/x509.h>

.sp

.BI "int gnutls_x509_crt_get_key_usage(gnutls_x509_crt_t " cert ", unsigned int * " key_usage ", unsigned int * " critical ");"

.SH ARGUMENTS

.IP "gnutls_x509_crt_t cert" 12

should contain a \fBgnutls_x509_crt_t\fP type

.IP "unsigned int * key_usage" 12

where the key usage bits will be stored

.IP "unsigned int * critical" 12

will be non\-zero if the extension is marked as critical

.SH "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: \fBGNUTLS_KEY_DIGITAL_SIGNATURE\fP,

\fBGNUTLS_KEY_NON_REPUDIATION\fP, \fBGNUTLS_KEY_KEY_ENCIPHERMENT\fP,

\fBGNUTLS_KEY_DATA_ENCIPHERMENT\fP, \fBGNUTLS_KEY_KEY_AGREEMENT\fP,

\fBGNUTLS_KEY_KEY_CERT_SIGN\fP, \fBGNUTLS_KEY_CRL_SIGN\fP,

\fBGNUTLS_KEY_ENCIPHER_ONLY\fP, \fBGNUTLS_KEY_DECIPHER_ONLY\fP.

.SH "RETURNS"

zero on success, or a negative error code in case of

parsing error.  If the certificate does not contain the keyUsage

extension \fBGNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE\fP will be

returned.

.SH "REPORTING BUGS"

Report bugs to <bugs@gnutls.org>.

.br

Home page: http://www.gnutls.org

.SH COPYRIGHT

Copyright \(co 2001-2018 Free Software Foundation, Inc., and others.

.br

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.

.SH "SEE ALSO"

The full documentation for

.B gnutls

is maintained as a Texinfo manual.

If the /usr/share/doc/gnutls/

directory does not contain the HTML form visit

.B

.IP http://www.gnutls.org/manual/

.PP