---
name: "asn1_check_version"
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_check_version"
---

# asn1\_check\_version(3)

API function

## NAME

asn1\_check\_version - API function

## SYNOPSIS

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

**const char \* asn1\_check\_version(const char \*** *req\_version***);**

## ARGUMENTS

- const char \* req\_version

  Required version number, or **NULL**.

## DESCRIPTION

Check that the version of the library is at minimum the requested one and return the version string; return **NULL** if the condition is not satisfied.  If a **NULL** is passed to this function, no check is done, but the version string is simply returned.

See **ASN1\_VERSION** for a suitable  *req\_version* string.

## RETURNS

Version string of run-time library, or **NULL** if the run-time library does not meet the required version number.

## 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/**