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// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
package auth
import (
"context"
)
// PLAIN is the mechanism name for PLAIN.
const PLAIN = "PLAIN"
func newPlainAuthenticator(cred *Cred) (Authenticator, error) {
return &PlainAuthenticator{
Username: cred.Username,
Password: cred.Password,
}, nil
}
// PlainAuthenticator uses the PLAIN algorithm over SASL to authenticate a connection.
type PlainAuthenticator struct {
Username string
Password string
}
// Auth authenticates the connection.
func (a *PlainAuthenticator) Auth(ctx context.Context, cfg *Config) error {
return ConductSaslConversation(ctx, cfg, "$external", &plainSaslClient{
username: a.Username,
password: a.Password,
})
}
type plainSaslClient struct {
username string
password string
}
var _ SaslClient = (*plainSaslClient)(nil)
func (c *plainSaslClient) Start() (string, []byte, error) {
b := []byte("\x00" + c.username + "\x00" + c.password)
return PLAIN, b, nil
}
func (c *plainSaslClient) Next([]byte) ([]byte, error) {
return nil, newAuthError("unexpected server challenge", nil)
}
func (c *plainSaslClient) Completed() bool {
return true
}