gnutls\_session\_set\_verify\_cert(3) gnutls gnutls\_session\_set\_verify\_cert(3)

# [NAME](#NAME)

gnutls\_session\_set\_verify\_cert - API function

# [SYNOPSIS](#SYNOPSIS)

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

**void gnutls\_session\_set\_verify\_cert(gnutls\_session\_t session, const char * hostname, unsigned flags);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_session\_t session](#gnutls_session_t)

is a gnutls session

[const char * hostname](#const)

is the expected name of the peer; may be **NULL**

[unsigned flags](#unsigned)

flags for certificate verification -- **gnutls\_certificate\_verify\_flags**

# [DESCRIPTION](#DESCRIPTION)

This function instructs GnuTLS to verify the peer's certificate using the provided hostname. If the verification fails the handshake will also fail with **GNUTLS\_E\_CERTIFICATE\_VERIFICATION\_ERROR**. In that case the verification result can be obtained using **gnutls\_session\_get\_verify\_cert\_status()**.

The *hostname* pointer provided must remain valid for the lifetime of the session. More precisely it should be available during any subsequent handshakes. If no hostname is provided, no hostname verification will be performed. For a more advanced verification function check **gnutls\_session\_set\_verify\_cert2()**.

If *flags* is provided which contain a profile, this function should be called after any session priority setting functions.

The **gnutls\_session\_set\_verify\_cert()** function is intended to be used by TLS clients to verify the server's certificate.

# [SINCE](#SINCE)

3.4.6

# [REPORTING BUGS](#REPORTING_BUGS)

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

# [COPYRIGHT](#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](#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/](https://www.gnutls.org/manual/)

3.8.13 gnutls

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Document: gnutls_session_set_verify_cert(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls