/**
 * @license
 * Copyright 2022 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * The only supported IV size.
 *
 */
export declare const IV_SIZE_IN_BYTES: number;
/**
 * Insecure version of `subtle/aes_gcm.ts` that allows the caller to set
 * the IV.
 *
 * @final
 */
export declare class InsecureIvAesGcm {
    private readonly key;
    private readonly prependIv;
    constructor({ key, prependIv }: {
        readonly key: CryptoKey;
        readonly prependIv: boolean;
    });
    encrypt(iv: Uint8Array, plaintext: Uint8Array, associatedData?: Uint8Array): Promise<Uint8Array>;
    decrypt(iv: Uint8Array, ciphertext: Uint8Array, associatedData?: Uint8Array): Promise<Uint8Array>;
}
/**
 * Returns an instantiated `InsecureIvAesGcm` given a raw byte array `key`
 * and `prependIv` flag.
 */
export declare function insecureIvAesGcmFromRawKey({ key, prependIv }: {
    key: Uint8Array;
    prependIv: boolean;
}): Promise<InsecureIvAesGcm>;