/**
 * (C) Copyright IBM Corp. 2019, 2023.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { Cp4dTokenManager } from '../token-managers/cp4d-token-manager';
import { BaseOptions, TokenRequestBasedAuthenticator } from './token-request-based-authenticator';
/** Configuration options for CloudPakForData authentication. */
export interface Options extends BaseOptions {
    /** The username used to obtain a bearer token. */
    username: string;
    /** The password used to obtain a bearer token [required if apikey not specified]. */
    password?: string;
    /** The API key used to obtain a bearer token [required if password not specified]. */
    apikey?: string;
    /** The URL representing the Cloud Pak for Data token service endpoint. */
    url: string;
}
/**
 * The CloudPakForDataAuthenticator will either use a username/password pair or a username/apikey pair to obtain
 * a bearer token from a token server.  When the bearer token expires, a new token is obtained from the token server.
 *
 * The bearer token will be sent as an Authorization header in the form:
 *
 *      Authorization: Bearer \<bearer-token\>
 */
export declare class CloudPakForDataAuthenticator extends TokenRequestBasedAuthenticator {
    protected requiredOptions: string[];
    protected tokenManager: Cp4dTokenManager;
    private username;
    private password;
    private apikey;
    /**
     * Create a new CloudPakForDataAuthenticator instance.
     *
     * @param options - Configuration options for CloudPakForData authentication.
     * This should be an object containing these fields:
     * - url: (required) the endpoint URL for the CloudPakForData token service
     * - username: (required) the username used to obtain a bearer token
     * - password: (optional) the password used to obtain a bearer token (required if apikey is not specified)
     * - apikey: (optional) the API key used to obtain a bearer token (required if password is not specified)
     * - disableSslVerification: (optional) a flag that indicates whether verification of the token server's SSL certificate
     * should be disabled or not
     * - headers: (optional) a set of HTTP headers to be sent with each request to the token service
     *
     * @throws Error: the username, password, and/or url are not valid, or unspecified, for Cloud Pak For Data token requests.
     */
    constructor(options: Options);
    /**
     * Returns the authenticator's type ('cp4d').
     *
     * @returns a string that indicates the authenticator's type
     */
    authenticationType(): string;
}