import { CancellationToken } from 'vscode-jsonrpc';
import { KeyPair, PrivateKeyProvider } from './algorithms/publicKeyAlgorithm';
/**
 * Provides a username and password for client authentication.
 *
 * If no username/password is available or the user cancels, a null result
 * may be returned. If the session disconnects before this callback returns,
 * the cancellation token will be cancelled.
 */
type PasswordCredentialProvider = (cancellation: CancellationToken) => Promise<[string, string] | null>;
/**
 * Defines credentials and/or credential callbacks for authenticating an SSH client session.
 */
export interface SshClientCredentials {
    /**
     * Gets or sets the username for client authentication.
     */
    username?: string;
    /**
     * Gets or sets the password for client authentication.
     *
     * A `PasswordProvider` callback may be set instead of supplying a username
     * and password up front.
     *
     * If neither a password, nor public keys, nor any provider callback are specified, then
     * the client will attempt to authenticate with only the username, which may or may not be
     * allowed by the server.
     *
     * If both public key and password credentials are set, then public key authentication
     * will be attempted first.
     */
    password?: string;
    /**
     * Gets or sets a callback for getting a username and password when requested.
     */
    passwordProvider?: PasswordCredentialProvider;
    /**
     * Gets or sets public keys for client authentication.
     *
     * The key pair objects may optionally include the private keys; alternatively loading of the
     * private keys may be delayed until requested, if a `privateKeyProvider` is specified.
     */
    publicKeys?: KeyPair[];
    /**
     * Gets or sets a callback for loading the private keys when requested.
     */
    privateKeyProvider?: PrivateKeyProvider;
}
/**
 * Defines credentials and/or credential callbacks for authenticating an SSH server session.
 */
export interface SshServerCredentials {
    /**
     * Gets or sets public keys for server authentication.
     *
     * The key pair objects may optionally include the private keys; alternatively loading of the
     * private keys may be delayed until requested, if a `privateKeyProvider` is specified.
     */
    publicKeys: KeyPair[];
    /**
     * Gets or sets a callback for loading the private keys when requested.
     */
    privateKeyProvider?: PrivateKeyProvider;
}
export {};
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