/// <reference types="node" />
import { AuthenticatedEncryption } from './types/authenticated-encryption';
import { SupportedJsonWebEncryptionContentEncryptionAlgorithm } from './types/supported-jsonwebencryption-contentencryption-algorithm';
/**
 * Abstract Base Class for {@link https://www.rfc-editor.org/rfc/rfc7518.html#section-5 RFC 7518 Section 5}.
 *
 * All JSON Web Encryption Content Encryption Algorithms supported by Guarani **MUST** extend this base class
 * and implement its abstract methods.
 */
export declare abstract class JsonWebEncryptionContentEncryptionAlgorithm {
    /**
     * Name of the JSON Web Encryption Content Encryption Algorithm.
     */
    protected readonly algorithm: SupportedJsonWebEncryptionContentEncryptionAlgorithm;
    /**
     * Size of the Content Encryption Key in bits.
     */
    readonly cekSize: number;
    /**
     * Size of the Initialization Vector in bits.
     */
    readonly ivSize: number;
    /**
     * Instantiates a new JSON Web Encryption Content Encryption Algorithm to Encrypt and Decrypt a Plaintext.
     *
     * @param cekSize Size of the Content Encryption Key in bits.
     * @param ivSize Size of the Initialization Vector in bits.
     * @param algorithm Name of the JSON Web Encryption Content Encryption Algorithm.
     */
    constructor(cekSize: number, ivSize: number, algorithm: SupportedJsonWebEncryptionContentEncryptionAlgorithm);
    /**
     * Generates a new Initialization Vector.
     */
    generateInitializationVector(): Promise<Buffer>;
    /**
     * Generates a new Content Encryption Key.
     */
    generateContentEncryptionKey(): Promise<Buffer>;
    /**
     * Checks if the provided Initialization Vector can be used by the JSON Web Encryption Content Encryption Algorithm.
     *
     * @param iv Initialization Vector to be checked.
     * @throws {InvalidJsonWebEncryptionException} The provided Initialization Vector is invalid.
     */
    protected validateInitializationVector(iv: Buffer): void;
    /**
     * Checks if the provided Content Encryption Key can be used by the JSON Web Encryption Content Encryption Algorithm.
     *
     * @param key Content Encryption Key to be checked.
     * @throws {InvalidJsonWebEncryptionException} The provided Content Encryption Key is invalid.
     */
    validateContentEncryptionKey(key: Buffer): void;
    /**
     * Encrypts the provided Plaintext.
     *
     * @param plaintext Plaintext to be Cncrypted.
     * @param aad Additional Authenticated Data.
     * @param iv Initialization Vector.
     * @param key Content Encryption Key used to Encrypt the provided Plaintext.
     * @returns Resulting Ciphertext and Authentication Tag.
     */
    abstract encrypt(plaintext: Buffer, aad: Buffer, iv: Buffer, key: Buffer): Promise<AuthenticatedEncryption>;
    /**
     * Decrypts the provided Ciphertext back to its original Plaintext.
     *
     * @param ciphertext Ciphertext to be Decrypted.
     * @param aad Additional Authenticated Data.
     * @param iv Initialization Vector.
     * @param tag Authentication Tag.
     * @param key Content Encryption Key used to Decrypt the provided Ciphertext.
     * @returns Resulting Plaintext.
     */
    abstract decrypt(ciphertext: Buffer, aad: Buffer, iv: Buffer, tag: Buffer, key: Buffer): Promise<Buffer>;
}