import * as pkcs11 from "pkcs11js";
import * as core from "../core";
import { MechanismType } from "../mech";
import { Session } from "../session";
import { Key } from '../objects';
import * as types from '../types';
/**
 * Represents verifying operation
 */
export declare class Verify extends core.BaseObject {
    /**
     * Session
     */
    session: Session;
    /**
     * Create a new instance of verifying operation
     * @param session Session
     * @param alg The verifying mechanism
     * @param key The verifying key
     * @param lib PKCS#11 library
     */
    constructor(session: Session, alg: MechanismType, key: Key, lib: pkcs11.PKCS11);
    /**
     * Continues a multiple-part verification operation
     * @param data The signed data
     */
    update(data: types.CryptoData): void;
    /**
     * Finishes a multiple-part verification operation, checking the signature
     * @param signature Th signature value
     * @returns `true` if signature is valid, otherwise `false`
     */
    final(signature: Buffer): boolean;
    /**
     * Verifies a signature in a single-part operation
     * @param data The signed data
     * @param signature The signature value
     * @returns `true` if signature is valid, otherwise `false`
     */
    once(data: types.CryptoData, signature: Buffer): boolean;
    /**
     * * Verifies a signature in a single-part operation
     * @param data The signed data
     * @param signature The signature value
     * @param cb Async callback function with boolean result of checking. `true` if signature is valid, otherwise `false`
     */
    once(data: types.CryptoData, signature: Buffer, cb: (error: Error | null, valid: boolean) => void): void;
    /**
     * initializes a verification operation
     * @param alg The verifying mechanism
     * @param key The verifying key
     */
    protected init(alg: MechanismType, key: Key): void;
}