import { DataKeyObject, DataKeyPairObject, EncryptDecryptOptions, NodeKmsConfig, NodeKmsExtendedConfig } from '../../TYPES';
/**
 * Class to execute KMS methods using Node Crypto
 *
 * @class
 */
export declare class NodeKms {
    /**
     * Configurations used for Node Crypto
     */
    CONFIG: NodeKmsExtendedConfig;
    /**
     * Creates an instance of NodeKms.
     *
     * @constructor
     * @param config
     */
    constructor(config: NodeKmsConfig);
    /**
     * Generates encryption keys for symmetric encryption algorithm
     *
     * @async
     * @returns
     */
    generateDataKey(): Promise<DataKeyObject>;
    /**
     * Generates encryption keys for asymmetric encryption algorithm
     *
     * @async
     * @returns
     */
    generateDataKeyPair(): Promise<DataKeyPairObject>;
    /**
     * Encrypts a given string using AES-256-CBC. The key and IV are as defined in `CONFIG.MASTER_KEY_HEX` and `CONFIG.MASTER_IV_HEX` respectively.
     *
     * @async
     * @param [plainText='']
     * @param [options]
     * @returns
     */
    encrypt(plainText?: string, options?: EncryptDecryptOptions): Promise<string>;
    /**
     * Decrypts a given string using AES-256-CBC. The key and IV are as defined in `CONFIG.MASTER_KEY_HEX` and `CONFIG.MASTER_IV_HEX` respectively.
     *
     * @async
     * @param [ciphertext='']
     * @param [options]
     * @returns
     */
    decrypt(ciphertext?: string, options?: EncryptDecryptOptions): Promise<string>;
}