import { SymmetricCipherVersion } from "./SymmetricCipherVersion.js";
import { Aes256Key, AesKey } from "./SymmetricCipherUtils.js";
export type SymmetricSubKeys = {
    encryptionKey: AesKey;
    authenticationKey: AesKey | null;
};
export type AeadSubKeys = SymmetricSubKeys & {
    encryptionKey: Aes256Key;
    authenticationKey: Aes256Key;
};
/**
 * Derives keys for symmetric encryption schemes.
 *
 * @deprecated DO NOT USE THIS MANUALLY - EXPORTED ONLY FOR COMPATIBILITY TESTS!
 */
export declare class SymmetricKeyDeriver {
    /**
     * Derives encryption and authentication keys as needed for the symmetric cipher implementations
     */
    deriveSubKeys(key: AesKey, symmetricCipherVersion: SymmetricCipherVersion): SymmetricSubKeys;
    /**
     * Derive encryption and authentication keys for AEAD from groupKey in the correct version and kdfNonce for the instance type.
     */
    deriveSubKeysAeadFromGroupKey(groupKey: AesKey, kdfNonce: Uint8Array, globalInstanceTypeId: string): AeadSubKeys;
    /**
     * Derive encryption and authentication keys for AEAD from the session key for the instance type.
     */
    deriveSubKeysAeadFromSessionKey(sessionKey: AesKey, globalInstanceTypeId: string): AeadSubKeys;
    private deriveAeadSubKeys;
}
export declare const SYMMETRIC_KEY_DERIVER: SymmetricKeyDeriver;