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= nng_tls_config_ca_chain(3)
//
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This document 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 _crl_ 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)>>
|
