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

# dane\_verify\_session\_crt(3)

API function

## NAME

dane\_verify\_session\_crt - API function

## SYNOPSIS

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

**int dane\_verify\_session\_crt(dane\_state\_t** *s***, gnutls\_session\_t** *session***, const char \*** *hostname***, const char \*** *proto***, unsigned int** *port***, unsigned int** *sflags***, unsigned int** *vflags***, unsigned int \*** *verify***);**

## ARGUMENTS

- dane\_state\_t s

  A DANE state structure (may be NULL)

- gnutls\_session\_t session

  A gnutls session

- const char \* hostname

  The hostname associated with the chain

- const char \* proto

  The protocol of the service connecting (e.g. tcp)

- unsigned int port

  The port of the service connecting (e.g. 443)

- unsigned int sflags

  Flags for the initialization of  *s* (if NULL)

- unsigned int vflags

  Verification flags; an OR'ed list of **dane\_verify\_flags\_t**.

- unsigned int \* verify

  An OR'ed list of **dane\_verify\_status\_t**.

## DESCRIPTION

This function will verify session's certificate chain against the CA constrains and/or the certificate available via DANE. See **dane\_verify\_crt()** for more information.

This will not verify the chain for validity; unless the DANE verification is restricted to end certificates, this must be be performed separately using **gnutls\_certificate\_verify\_peers3()**.

## RETURNS

a negative error code on error and **DANE\_E\_SUCCESS** (0) when the DANE entries were successfully parsed, irrespective of whether they were verified (see  *verify* for that information). If no usable entries were encountered **DANE\_E\_REQUESTED\_DATA\_NOT\_AVAILABLE** will be returned.

## 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/