import * as crypto from 'node:crypto';
import { Transform, type TransformCallback, type TransformOptions } from 'node:stream';
export declare class DecryptTransform extends Transform {
    private decipher?;
    private algo;
    private cipherKey;
    private ivLength;
    private inputEncoding?;
    constructor(algo: string, cipherKey: crypto.KeyObject, ivLength: number, inputEncoding?: BufferEncoding, opts?: TransformOptions);
    _transform(chunk: any, _encoding: BufferEncoding, callback: TransformCallback): void;
    _flush(callback: TransformCallback): void;
}