.\" DO NOT MODIFY THIS FILE!  It was generated by gdoc.
.TH "asn1_length_der" 3 "4.19.0" "libtasn1" "libtasn1"
.SH NAME
asn1_length_der \- API function
.SH SYNOPSIS
.B #include <libtasn1.h>
.sp
.BI "void asn1_length_der(unsigned long int " len ", unsigned char * " der ", int * " der_len ");"
.SH ARGUMENTS
.IP "unsigned long int len" 12
value to convert.
.IP "unsigned char * der" 12
buffer to hold the returned encoding (may be \fBNULL\fP).
.IP "int * der_len" 12
number of meaningful bytes of ANS (der[0]..der[der_len\-1]).
.SH "DESCRIPTION"
Creates the DER encoding of the provided length value.
The  \fIder\fP buffer must have enough room for the output. The maximum
length this function will encode is \fBASN1_MAX_LENGTH_SIZE\fP.

To know the size of the DER encoding use a \fBNULL\fP value for  \fIder\fP .
.SH COPYRIGHT
Copyright \(co 2006-2022 Free Software Foundation, Inc..
.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 libtasn1
is maintained as a Texinfo manual.  If the
.B info
and
.B libtasn1
programs are properly installed at your site, the command
.IP
.B info libtasn1
.PP
should give you access to the complete manual.
As an alternative you may obtain the manual from:
.IP
.B https://www.gnu.org/software/libtasn1/manual/
.PP