.\" DO NOT MODIFY THIS FILE!  It was generated by gdoc.
.TH "asn1_get_length_der" 3 "4.19.0" "libtasn1" "libtasn1"
.SH NAME
asn1_get_length_der \- API function
.SH SYNOPSIS
.B #include <libtasn1.h>
.sp
.BI "long asn1_get_length_der(const unsigned char * " der ", int " der_len ", int * " len ");"
.SH ARGUMENTS
.IP "const unsigned char * der" 12
DER data to decode.
.IP "int der_len" 12
Length of DER data to decode.
.IP "int * len" 12
Output variable containing the length of the DER length field.
.SH "DESCRIPTION"
Extract a length field from DER data.
.SH "RETURNS"
Return the decoded length value, or \-1 on indefinite
length, or \-2 when the value was too big to fit in a int, or \-4
when the decoded length value plus  \fIlen\fP would exceed  \fIder_len\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