/// <reference types="node" />
import { PrivKey } from '@noble/curves/abstract/utils';
import { PubKey } from '@noble/curves/abstract/weierstrass';
export declare const IV_LENGTH = 16;
/**
 * NIST 8000-56C Rev 1 One Step KDF with the following parameters:
 * - H(x) is SHA-256(x)
 * - Fixed info is null
 *
 * TODO:
 * - Implement proper ceiling on reps.
 *
 * @param {Buffer} px Input keying material to derive key from.
 * @param {number} kdLen Length of output in bytes
 * @returns {Buffer} Output keying material of length kdLen bytes.
 */
export declare const ConcatKDF: (px: Buffer, kdLen: number) => Buffer;
/**
 * AES-128 CTR encrypt
 * @param {Uint8Array} encryptionKey
 * @param {Uint8Array} iv
 * @param {Uint8Array} plaintext
 * @returns {Uint8Array} ciphertext
 */
export declare function AES128Encrypt(encryptionKey: Uint8Array, iv: Uint8Array, plaintext: Uint8Array): Uint8Array;
/**
 * AES-128 CTR encrypt with message authentication
 * @param {Uint8Array} encryptionKey
 * @param {Uint8Array} macKey
 *
 * @param {Uint8Array} plaintext
 * @returns {Uint8Array} ciphertext
 */
export declare function AES128EncryptAndHMAC(encryptionKey: Uint8Array, macKey: Uint8Array, plaintext: Uint8Array): Uint8Array;
/**
 * AES-128 CTR decrypt
 * @param {Uint8Array} encryptionKey
 * @param {Uint8Array} iv
 * @param {Uint8Array} ciphertext
 * @returns {Uint8Array} plaintext
 */
export declare function AES128Decrypt(encryptionKey: Uint8Array, iv: Uint8Array, ciphertext: Uint8Array): Uint8Array;
/**
 * AES-128 CTR decrypt with message authentication
 * @param {Uint8Array} encryptionKey
 * @param {Uint8Array} macKey
 * @param {Uint8Array} ciphertext
 * @returns {Uint8Array} plaintext
 */
export declare function AES128DecryptAndHMAC(encryptionKey: Uint8Array, macKey: Uint8Array, ciphertext: Uint8Array): Uint8Array;
/**
 * ECIES encrypt
 * @param {Buffer} pubKeyTo Ethereum pub key, 64 bytes.
 * @param {Uint8Array} plaintext Plaintext to be encrypted.
 * @returns {Buffer} Encrypted message, serialized, 113+ bytes
 */
export declare function Encrypt(pubKeyTo: PubKey, plaintext: Uint8Array): Buffer;
/**
 * ECIES decrypt
 * @param {Buffer} privKey Ethereum private key, 32 bytes.
 * @param {Buffer} encrypted Encrypted message, serialized, 113+ bytes
 * @returns {Buffer} plaintext
 */
export declare function Decrypt(privKey: PrivKey, encrypted: Buffer): Uint8Array;
export declare const ECIES: {
    Encrypt: typeof Encrypt;
    Decrypt: typeof Decrypt;
    AES128EncryptAndHMAC: typeof AES128EncryptAndHMAC;
    AES128DecryptAndHMAC: typeof AES128DecryptAndHMAC;
};