/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { PbKeysetKey, PbKeyStatusType, PbOutputPrefixType } from './proto';
import { Constructor } from './util';
/**
 * Auxiliary class for PrimitiveSet
 * Entry-objects hold individual instances of primitives in the set.
 *
 * @template P
 * @final
 */
export declare class Entry<P> {
    private readonly primitive;
    private readonly identifier;
    private readonly keyStatus;
    private readonly outputPrefixType;
    constructor(primitive: P, identifier: Uint8Array, keyStatus: PbKeyStatusType, outputPrefixType: PbOutputPrefixType);
    getPrimitive(): P;
    getIdentifier(): Uint8Array;
    getKeyStatus(): PbKeyStatusType;
    getOutputPrefixType(): PbOutputPrefixType;
}
/**
 * A container class for a set of primitives (i.e. implementations of
 * cryptographic primitives offered by Tink). It provides also additional
 * properties for the primitives it holds. In particular, one of the primitives
 * in the set can be distinguished as "the primary" one.
 *
 * PrimitiveSet is an auxiliary class used for supporting key rotation:
 * primitives in a set correspond to keys in a keyset. Users will usually work
 * with primitive instances which essentially wrap primitive sets. For example
 * an instance of an Aead-primitive for a given keyset holds a set of
 * Aead-primitives corresponding to the keys in the keyset, and uses the set
 * members to do the actual crypto operations: to encrypt data the primary
 * Aead-primitive from the set is used, and upon decryption the ciphertext's
 * prefix determines the identifier of the primitive from the set.
 *
 * PrimitiveSet is a public class to allow its use in implementations of custom
 * primitives.
 *
 * @final
 */
export declare class PrimitiveSet<P> {
    private readonly primitiveType;
    private primary;
    private readonly identifierToPrimitivesMap;
    constructor(primitiveType: Constructor<P>);
    /**
     * Returns the type of primitives contained in this set.
     *
     */
    getPrimitiveType(): Constructor<P>;
    /**
     * Creates an entry in the primitive table and returns it.
     *
     *
     */
    addPrimitive(primitive: P, key: PbKeysetKey): Entry<P>;
    /**
     * Returns the entry with the primary primitive.
     *
     */
    getPrimary(): Entry<P> | null;
    /**
     * Sets given Entry as the primary one.
     *
     */
    setPrimary(primitive: Entry<P>): void;
    /**
     * Returns all primitives using RAW prefix.
     *
     */
    getRawPrimitives(): Array<Entry<P>>;
    /**
     * Returns the entries with primitive identified with identifier.
     *
     *
     */
    getPrimitives(identifier: Uint8Array): Array<Entry<P>>;
    /**
     * Returns a set of primitives which corresponds to the given identifier.
     *
     *
     */
    private getPrimitivesFromMap;
    /**
     * Add primitive to map.
     *
     */
    private addPrimitiveToMap;
}