nng_tls_config_ca_chain(3)
==========================
:doctype: manpage
:manmanual: nng
:mansource: nng
:manvolnum: 3
:icons: font
:source-highlighter: pygments
:copyright: Copyright 2018 Staysail Systems, Inc. <info@staysail.tech> \
            Copyright 2018 Capitar IT Group BV <info@capitar.com> \
            This software is supplied under the terms of the MIT License, a \
            copy of which should be located in the distribution where this \
            file was obtained (LICENSE.txt).  A copy of the license may also \
            be found online at https://opensource.org/licenses/MIT.

NAME
----
nng_tls_config_ca_chain - configure certificate authority certificate chain

SYNOPSIS
--------

[source, c]
-----------
#include <nng/nng.h>

int nng_tls_config_ca_cert(nni_tls_config *cfg, const char *chain,
    const char *crl);
-----------

DESCRIPTION
-----------

The `nng_tls_config_ca_chain()` function configures a certificate or
certificate chain to be used when validating peers using the configuration
'cfg'.

NOTE: Certificates *must* be configured when using the authentication mode
`NNG_TLS_AUTH_MODE_REQUIRED`.

TIP: This function may be called multiple times, to add additional chains
to a configuration, without affecting those added previously.

The certificates located in 'chain' must be a zero-terminated C string in
https://tools.ietf.org/html/rfc7468[PEM] format.  Multiple certificates may
appear concatenated together, with the leaf certificate listed first.
together.

The 'crl' may be NULL, or may also be a C string containing a PEM format
certificate revocation list for the associated authority.

RETURN VALUES
-------------

This function returns 0 on success, and non-zero otherwise.

ERRORS
------

`NNG_ENOMEM`:: Insufficient memory is available.
`NNG_EBUSY`:: The configuration 'cfg' is already in use, and cannot be modified.
`NNG_EINVAL`:: An invalid 'chain' or 'size' was supplied.

SEE ALSO
--------

<<nng_strerror#,nng_strerror(3)>>,
<<nng_tls_config_alloc#,nng_tls_config_alloc(3)>>,
<<nng_tls_config_auth_mode#,nng_tls_config_auth_mode(3)>>,
<<nng_tls_config_ca_file#,nng_tls_config_ca_file(3)>>,
<<nng#,nng(7)>>


COPYRIGHT
---------

Copyright 2018 mailto:info@staysail.tech[Staysail Systems, Inc.] +
Copyright 2018 mailto:info@capitar.com[Capitar IT Group BV]

This document is supplied under the terms of the
https://opensource.org/licenses/MIT[MIT License].
