/*! Copyright 2023-2024 the gnablib contributors MPL-1.1 */
import { IBlockCrypt } from '../interfaces/IBlockCrypt.js';
import { IFullCrypt } from '../interfaces/IFullCrypt.js';
export declare class Cfb implements IFullCrypt {
    private readonly _crypt;
    private readonly _iv;
    constructor(crypt: IBlockCrypt, iv: Uint8Array);
    get blockSize(): number;
    decryptInto(plain: Uint8Array, enc: Uint8Array): void;
    encryptInto(enc: Uint8Array, plain: Uint8Array): void;
    encryptSize(plainLen: number): number;
}