---
name: "asn1_parser2tree"
section: "3"
platform: "linux"
package: "libtasn1"
version: "4.21.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/asn1_parser2tree"
---

# asn1\_parser2tree(3)

API function

## NAME

asn1\_parser2tree - API function

## SYNOPSIS

**#include \<libtasn1.h\>**

**int asn1\_parser2tree(const char \*** *file***, asn1\_node \*** *definitions***, char \*** *error\_desc***);**

## ARGUMENTS

- const char \* file

  specify the path and the name of file that contains ASN.1 declarations.

- asn1\_node \* definitions

  return the pointer to the structure created from "file" ASN.1 declarations.

- char \* error\_desc

  return the error description or an empty string if success.

## DESCRIPTION

Function used to start the parse algorithm.  Creates the structures needed to manage the definitions included in  *file* file.

## RETURNS

**ASN1\_SUCCESS** if the file has a correct syntax and every identifier is known, **ASN1\_ELEMENT\_NOT\_EMPTY** if  *definitions* not **NULL**, **ASN1\_FILE\_NOT\_FOUND** if an error occurred while opening  *file* , **ASN1\_SYNTAX\_ERROR** if the syntax is not correct, **ASN1\_IDENTIFIER\_NOT\_FOUND** if in the file there is an identifier that is not defined, **ASN1\_NAME\_TOO\_LONG** if in the file there is an identifier with more than **ASN1\_MAX\_NAME\_SIZE** characters.

## COPYRIGHT

Copyright © 2006-2025 Free Software Foundation, Inc..\
 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.

## SEE ALSO

The full documentation for **libtasn1** is maintained as a Texinfo manual.  If the **info** and **libtasn1** programs are properly installed at your site, the command

-

  **info libtasn1**

should give you access to the complete manual. As an alternative you may obtain the manual from:

-

  **https://www.gnu.org/software/libtasn1/manual/**