nng_tls_config_auth_mode3tls
Configure authentication mode
Usage
#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(nng_tls_config *cfg, nng_tls_auth_mode mode);
Overview
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 session 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.