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

.TH "gnutls_x509_crt_get_extension_by_oid" 3 "3.6.2" "gnutls" "gnutls"

.SH NAME

gnutls_x509_crt_get_extension_by_oid \- API function

.SH SYNOPSIS

.B #include <gnutls/x509.h>

.sp

.BI "int gnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_t " cert ", const char * " oid ", unsigned " indx ", void * " buf ", size_t * " buf_size ", unsigned int * " critical ");"

.SH ARGUMENTS

.IP "gnutls_x509_crt_t cert" 12

should contain a \fBgnutls_x509_crt_t\fP type

.IP "const char * oid" 12

holds an Object Identified in null terminated string

.IP "unsigned indx" 12

In case multiple same OIDs exist in the extensions, this specifies which to send. Use (0) to get the first one.

.IP "void * buf" 12

a pointer to a structure to hold the name (may be null)

.IP "size_t * buf_size" 12

initially holds the size of  \fIbuf\fP 

.IP "unsigned int * critical" 12

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

.SH "DESCRIPTION"

This function will return the extension specified by the OID in the

certificate.  The extensions will be returned as binary data DER

encoded, in the provided buffer.

.SH "RETURNS"

On success, \fBGNUTLS_E_SUCCESS\fP (0) is returned,

otherwise a negative error code is returned. If the certificate does not

contain the specified extension

GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE 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