import { AsyncOptionalCreatable } from '@salesforce/kit';
import { Optional } from '@salesforce/ts-types';
import { KeyChain } from './keyChainImpl';
interface CryptoOptions {
    keychain?: KeyChain;
    platform?: string;
    retryStatus?: string;
    noResetOnClose?: boolean;
}
/**
 * Class for managing encrypting and decrypting private auth information.
 */
export declare class Crypto extends AsyncOptionalCreatable<CryptoOptions> {
    private _key;
    private options;
    private messages;
    private noResetOnClose;
    /**
     * Constructor
     * **Do not directly construct instances of this class -- use {@link Crypto.create} instead.**
     * @param options The options for the class instance.
     * @ignore
     */
    constructor(options?: CryptoOptions);
    /**
     * Encrypts text. Returns the encrypted string or undefined if no string was passed.
     * @param text The text to encrypt.
     */
    encrypt(text?: string): Optional<string>;
    /**
     * Decrypts text.
     * @param text The text to decrypt.
     */
    decrypt(text?: string): Optional<string>;
    /**
     * Clears the crypto state. This should be called in a finally block.
     */
    close(): void;
    /**
     * Initialize async components.
     */
    protected init(): Promise<void>;
    private getKeyChain;
}
export {};