import { EncryptionKey } from '../encryption-key';
import { DerivedKeyOptions, IRandomKeyOptions } from './derived-key';
/**
 * Given a password/phrase, derive a fixed-length key from it using Pbkdf2Hmac.
 * Various derivation arguments can be provided to ensure deterministic results
 * (i.e. to derive the same key again from the same password/phrase).
 */
export declare function generateDerivedKey({ passphrase, length, minIterations, iterationVariance, useSalt, }: Partial<IRandomKeyOptions> & {
    passphrase: string;
}): Promise<{
    key: EncryptionKey;
    options: DerivedKeyOptions;
}>;