import type { CipherSuite } from '../stream/types.js';
/**
 * `CipherSuite` implementation for the stream construction using
 * AES-256-GCM-SIV (RFC 8452).
 *
 * Each chunk is encrypted with AES-256-GCM-SIV using a per-stream
 * AES key derived via HKDF-SHA-256. Unlike `XChaCha20Cipher` there is
 * no intermediate subkey derivation step, AES-GCM-SIV uses a 12-byte
 * nonce natively, so the 32 bytes from HKDF feed straight into the
 * cipher.
 *
 * Pass to `Seal` / `SealStream` / `OpenStream` / `SealStreamPool`
 * instead of constructing this object directly. Use
 * `AESGCMSIVCipher.keygen()` to generate a 32-byte master key.
 *
 * The cipher suite is AES-256 only; the standalone `AESGCMSIV` primitive
 * class continues to support both AES-128 and AES-256 (RFC 8452 §6).
 */
export declare const AESGCMSIVCipher: CipherSuite & {
    keygen(): Uint8Array;
};