import { SshSession } from './sshSession';
import { CancellationToken } from 'vscode-jsonrpc';
import { SshSessionConfiguration } from './sshSessionConfiguration';
import { SshChannel } from './sshChannel';
import { ChannelOpenMessage, ChannelRequestMessage } from './messages/connectionMessages';
import { Stream } from './streams';
import { SshClientCredentials } from './sshCredentials';
/**
 * The client side of an SSH session. Extends the base `SshSession` class to
 * support client authentication.
 */
export declare class SshClientSession extends SshSession {
    private readonly serviceRequests;
    constructor(config: SshSessionConfiguration);
    private clientAuthCompletion;
    /**
     * Attempts to authenticate both the server and client.
     *
     * This method must be called only after encrypting the session. It is equivalent
     * to calling both `authenticateServer()` and `authenticateClient()` and waiting on
     * both results.
     *
     * @returns `true` if authentication succeeded, `false` if it failed.
     */
    authenticate(clientCredentials: SshClientCredentials, cancellation?: CancellationToken): Promise<boolean>;
    /**
     * Triggers server authentication by invoking the `authenticating` event with
     * the verified server host key.
     *
     * This method must be called only after encrypting the session. It does not wait for any
     * further message exchange with the server, since the server host key would have already
     * been obtained during the key-exchange.
     *
     * @returns `true` if authentication succeeded, `false` if it failed.
     */
    authenticateServer(cancellation?: CancellationToken): Promise<boolean>;
    /**
     * Performs client authentication by sending the configured public key or
     * password credential to the server and waiting for a response.
     *
     * This method must be called only after encrypting the session.
     *
     * @returns `true` if authentication succeeded, `false` if it failed.
     */
    authenticateClient(credentials: SshClientCredentials, cancellation?: CancellationToken): Promise<boolean>;
    /**
     * Performs client authentication by sending the configured public key or
     * password credential to the server. Returns the result later via a callback.
     *
     * This method must be called only after encrypting the session. It waits for the
     * authentication request message to be sent, but does not directly wait for a response.
     * In scenarios when client authentication is non-interactive, only a single credential
     * is used, and it is expected to be always successful in non-exceptional conditions,
     * then this method may reduce the time required to establish a secure session by not
     * blocking on the authentication result before sending additional messages such as
     * channel open requests. If the authentication fails then those additional requests
     * would likely fail also, and in that case the callback may reveal the reason.
     *
     * @param callback Callback that will be invoked with the result of the client
     * authentication, or with an error if the session is disconnected before
     * authentication completed.
     */
    authenticateClient(credentials: SshClientCredentials, callback: (err?: Error, result?: boolean) => void, cancellation?: CancellationToken): Promise<void>;
    private authenticateClientWithCompletion;
    /**
     * Sends a request for a service and waits for a response.
     *
     * @param serviceName Name of the service to be requested.
     * @param cancellation Optional cancellation token.
     * @returns A promise that resolves when the service request has been accepted.
     *
     * If the server does not accept the service request, it will disconnect the session.
     */
    requestService(serviceName: string, cancellation?: CancellationToken): Promise<void>;
    openChannel(channelTypeOrOpenMessageOrCancellation?: string | null | ChannelOpenMessage | CancellationToken, initialRequestOrCancellation?: ChannelRequestMessage | null | CancellationToken, cancellation?: CancellationToken): Promise<SshChannel>;
    /**
     * Call instead of `connect()` to reconnect to a prior session instead of connecting
     * a new session.
     * @param stream A new stream that has just (re-) connected to the server.
     * @param cancellation Optional cancellation token.
     * @returns True if reconnect succeeded, false if the server declined the reconnect
     * request or reconnect session validation failed. In the case of a false return value,
     * retrying is unlikely to succeed.
     * @throws {SshConnectionError} There was a problem connecting to or communicating with
     * the server; retrying may still succeed if connectivity is restored.
     * @throws {SshReconnectError} Reconnect failed for some reason other than a communication
     * issue: see the `failureReason` property of the error. Retrying is unlikely to succeed,
     * unless the specific error condition can be addressed.
     */
    reconnect(stream: Stream, cancellation?: CancellationToken): Promise<void>;
    private reconnectInternal;
    dispose(): void;
}
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