Implements error

Continues challenge-response authentication. A non-nil error causes the client to abort the authentication attempt.

Begins SASL authentication with the server. It returns the authentication mechanism name and "initial response" data (if required by the selected mech

A client implementation of the ANONYMOUS authentication mechanism, as described in RFC 4505.

A server implementation of the ANONYMOUS authentication mechanism, as described in RFC 4505.

An implementation of the EXTERNAL authentication mechanism, as described in RFC 4422. Authorization identity may be left blank to indicate that the cl

NewExternalServer creates a server implementation of the EXTERNAL authentication mechanism, as described in RFC 4422.

A client implementation of the LOGIN authentication mechanism for SMTP, as described in http://www.iana.org/go/draft-murchison-sasl-login It is consi

An implementation of the OAUTHBEARER authentication mechanism, as described in RFC 7628.

A client implementation of the PLAIN authentication mechanism, as described in RFC 4616. Authorization identity may be left blank to indicate that it

A server implementation of the PLAIN authentication mechanism, as described in RFC 4616.

Begins or continues challenge-response authentication. If the client supplies an initial response, response is non-nil. If the authentication is fini