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This documentation is for version v1.1.0 of nng, but the latest released version is v1.3.2. see the documentation for v1.3.2 for the most up-to-date information.


#include <nng/nng.h>
#include <nng/supplemental/tls/tls.h>

int nng_tls_config_ca_file(nng_tls_config *cfg, const char *path);


The nng_tls_config_ca_file() function configures the certificate authority certificate chain and optional revocation list by loading the certificates (and revocation list if present) from a single named file. The file must at least one X.509 certificate in PEM format, and may contain multiple such certificates, as well as zero or more PEM CRL objects. This information is used to validate certificates that are presented by peers, when using the configuration cfg.

Certificates must be configured when using the authentication mode NNG_TLS_AUTH_MODE_REQUIRED.
This function may be called multiple times, to add additional chains to a configuration, without affecting those added previously.


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



Insufficient memory is available.


The configuration cfg is already in use, and cannot be modified.


The contents of path are invalid or do not contain a valid PEM certificate.


The file path does not exist.


The file path is not readable.

NNG Reference Manual vv1.1.0 © 2019 Staysail Systems, Inc, © 2018 Capitar IT Group BV
This document is supplied under the MIT License.
nanomsg™ and nng™ are trademarks of Garrett D'Amore.