import { type Cipher, type XorStream } from './utils.js';
export type ARXCipherN = ((key: Uint8Array, nonce: Uint8Array, AAD?: Uint8Array) => Cipher) & {
    blockSize: number;
    nonceLength: number;
    tagLength: number;
};
export declare function hsalsa(s: Uint32Array, k: Uint32Array, i: Uint32Array, o32: Uint32Array): void;
export declare function hchacha(s: Uint32Array, k: Uint32Array, i: Uint32Array, o32: Uint32Array): void;
/**
 * salsa20, 12-byte nonce.
 */
export declare const salsa20: XorStream;
/**
 * xsalsa20, 24-byte nonce.
 */
export declare const xsalsa20: XorStream;
/**
 * chacha20 non-RFC, original version by djb. 8-byte nonce, 8-byte counter.
 */
export declare const chacha20orig: XorStream;
/**
 * chacha20 RFC 8439 (IETF / TLS). 12-byte nonce, 4-byte counter.
 */
export declare const chacha20: XorStream;
/**
 * xchacha20 eXtended-nonce. https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-xchacha
 */
export declare const xchacha20: XorStream;
/**
 * 8-round chacha from the original paper.
 */
export declare const chacha8: XorStream;
/**
 * 12-round chacha from the original paper.
 */
export declare const chacha12: XorStream;
export declare function poly1305(msg: Uint8Array, key: Uint8Array): Uint8Array;
/**
 * xsalsa20-poly1305 eXtended-nonce (24 bytes) salsa.
 */
export declare const xsalsa20poly1305: ARXCipherN;
/**
 * Alias to xsalsa20-poly1305
 */
export declare function secretbox(key: Uint8Array, nonce: Uint8Array): {
    seal: (plaintext: Uint8Array) => Uint8Array;
    open: (ciphertext: Uint8Array) => Uint8Array;
};
export declare const _poly1305_aead: (fn: XorStream) => (key: Uint8Array, nonce: Uint8Array, AAD?: Uint8Array) => Cipher;
/**
 * chacha20-poly1305 12-byte-nonce chacha.
 */
export declare const chacha20poly1305: ARXCipherN;
/**
 * xchacha20-poly1305 eXtended-nonce (24 bytes) chacha.
 * With 24-byte nonce, it's safe to use fill it with random (CSPRNG).
 */
export declare const xchacha20poly1305: ARXCipherN;
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