/// <reference types="node" />
import { CancellationToken, Disposable } from 'vscode-jsonrpc';
import { Stream } from './streams';
import { SshChannel } from './sshChannel';
import { SshStream } from './sshStream';
import { SshSession } from './sshSession';
import { SshSessionClosedEventArgs } from './events/sshSessionClosedEventArgs';
import { Trace } from './trace';
import { SshClientCredentials, SshServerCredentials } from './sshCredentials';
import { SshServerSession } from './sshServerSession';
import { SshAuthenticatingEventArgs } from './events/sshAuthenticatingEventArgs';
import { Duplex } from 'stream';
import { PromiseCompletionSource } from './util/promiseCompletionSource';
/**
 * Establishes an end-to-end encrypted two-way authenticated data stream over an underlying
 * transport stream, using the SSH protocol but providing simplified interface that is limited to
 * a single duplex stream (channel).
 *
 * This class is a complement to `MultiChannelStream`, which provides only the channel-multiplexing
 * functions of SSH.
 *
 * To establish a secure connection, the two sides first establish an insecure transport stream
 * over a pipe, socket, or anything else. Then they encrypt and authenticate the connection
 * before beginning to send and receive data.
 */
export declare class SecureStream extends Duplex implements Disposable {
    private transportStream;
    protected readonly session: SshSession;
    protected readonly clientCredentials: SshClientCredentials | null;
    protected readonly serverCredentials: SshServerCredentials | null;
    protected readonly connectCompletion: PromiseCompletionSource<SshStream | null>;
    protected stream?: SshStream;
    private disposed;
    protected disposables: Disposable[];
    /**
     * Creates a new encrypted and authenticated stream over an underlying transport stream.
     * @param transportStream Stream that is used to multiplex all the channels.
     * @param credentials Client or server credentials for authenticating the secure connection.
     * @param reconnectableSessions Optional parameter that enables the stream to be reconnected
     * with a new transport stream after a temporary disconnection. For a stream client it is
     * a boolean value; for a stream server it must be an array.
     */
    constructor(transportStream: Stream | Duplex, credentials: SshClientCredentials | SshServerCredentials, reconnectableSessions?: SshServerSession[] | boolean);
    get trace(): Trace;
    set trace(trace: Trace);
    get isClosed(): boolean;
    private readonly disconnectedEmitter;
    readonly onDisconnected: import("vscode-jsonrpc").Event<void>;
    private readonly closedEmitter;
    readonly onClosed: import("vscode-jsonrpc").Event<SshSessionClosedEventArgs>;
    onAuthenticating(listener: (e: SshAuthenticatingEventArgs) => any, thisArgs?: any, disposables?: Disposable[]): Disposable;
    /**
     * Initiates the SSH session over the transport stream by exchanging initial messages with the
     * remote peer. Waits for the protocol version exchange and key exchange. Additional message
     * processing is kicked off as a background promise chain.
     * @param cancellation optional cancellation token.
     */
    connect(cancellation?: CancellationToken): Promise<void>;
    /**
     * Re-initiates the SSH session over a NEW transport stream by exchanging initial messages
     * with the remote server. Waits for the secure reconnect handshake to complete. Additional
     * message processing is kicked off as a background task chain.
     *
     * Applies only to a secure stream client. (The secure stream server handles reconnections
     * automatically during the session handshake.)
     */
    reconnect(transportStream: Stream | Duplex, cancellation?: CancellationToken): Promise<void>;
    /**
     * Creates a stream instance for a channel. May be overridden to create a `SshStream` subclass.
     */
    protected createStream(channel: SshChannel): SshStream;
    dispose(): void;
    close(): Promise<void>;
    private onSessionDisconnected;
    private onSessionClosed;
    private unsubscribe;
}
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