SYNOPSIS
#include <nng/nng.h>
#include <nng/supplemental/tls/tls.h>
typedef enum nng_tls_auth_mode {
NNG_TLS_AUTH_MODE_NONE,
NNG_TLS_AUTH_MODE_OPTIONAL,
NNG_TLS_AUTH_MODE_REQUIRED
} nng_tls_auth_mode;
int nng_tls_config_auth_mode(nni_tls_config *cfg, nng_tls_auth_mode mode);DESCRIPTION
The nng_tls_config_auth_mode() function configures the authentication mode
to be used for TLS sessions using this configuration object.
The possible modes are:
NNG_TLS_AUTH_MODE_NONE-
No authentication of the TLS peer is performed. This is the default for TLS servers, which most typically do not authenticate their clients.
NNG_TLS_AUTH_MODE_OPTIONAL-
If a certificate is presented by the peer, then it is validated. However, if the peer does not present a valid certificate, then the sesssion is allowed to proceed without authentication.
NNG_TLS_AUTH_MODE_REQUIRED-
A check is made to ensure that the peer has presented a valid certificate used for the session. If the peer’s certificate is invalid or missing, then the session is refused. This is the default for clients.
RETURN VALUES
This function returns 0 on success, and non-zero otherwise.
ERRORS
NNG_ENOMEM-
Insufficient memory is available.
NNG_EINVAL-
An invalid mode was specified.
NNG_EBUSY-
The configuration cfg is already in use, and cannot be modified.