/**
 * Compact AES (128/192/256) block cipher in CTR mode.
 *
 * WinZip AES-encrypted ZIP entries use AES in CTR mode with a 16-byte counter
 * that increments **little-endian** starting at 1 — which the WebCrypto
 * `AES-CTR` primitive (big-endian counter, no raw-block/ECB access) cannot
 * produce. So the keystream is built here from a small, dependency-free,
 * synchronous AES, while the standard parts (PBKDF2, HMAC-SHA1) still come from
 * WebCrypto in the caller. Tables are derived once on first use.
 */
/** An AES cipher with an expanded key, exposing single-block ECB encryption. */
export declare class Aes {
    private rk;
    private rounds;
    constructor(key: Uint8Array);
    /** Encrypt one 16-byte block of `src` at `srcOff` into `dst` at `dstOff`. */
    encryptBlock(src: Uint8Array, srcOff: number, dst: Uint8Array, dstOff: number): void;
}
/**
 * Encrypt/decrypt `data` with WinZip's AES-CTR: a 16-byte little-endian counter
 * starting at 1, one keystream block per 16 bytes, XORed into the data. CTR is
 * symmetric, so the same call decrypts.
 */
export declare function aesCtrXor(cipher: Aes, data: Uint8Array): Uint8Array;
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