---
name: "gnutls_x509_crt_verify"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_x509_crt_verify"
---

# gnutls\_x509\_crt\_verify(3)

API function

## NAME

gnutls\_x509\_crt\_verify - API function

## SYNOPSIS

**#include \<gnutls/x509.h\>**

**int gnutls\_x509\_crt\_verify(gnutls\_x509\_crt\_t** *cert***, const gnutls\_x509\_crt\_t \*** *CA\_list***, unsigned** *CA\_list\_length***, unsigned int** *flags***, unsigned int \*** *verify***);**

## ARGUMENTS

- gnutls\_x509\_crt\_t cert

  is the certificate to be verified

- const gnutls\_x509\_crt\_t \* CA\_list

  is one certificate that is considered to be trusted one

- unsigned CA\_list\_length

  holds the number of CA certificate in CA\_list

- unsigned int flags

  Flags that may be used to change the verification algorithm. Use OR of the gnutls\_certificate\_verify\_flags enumerations.

- unsigned int \* verify

  will hold the certificate verification output.

## DESCRIPTION

This function will try to verify the given certificate and return its status. Note that a verification error does not imply a negative return status. In that case the  *verify* status is set.

The details of the verification are the same as in **gnutls\_x509\_trust\_list\_verify\_crt2()**.

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error value.

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2023 Free Software Foundation, Inc., and others.\
 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 **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

- https://www.gnutls.org/manual/