/**
 * @license
 * Copyright 2023 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import * as keyManager from '../../../internal/key_manager';
import { PbKeyData, PbMessage } from '../../../internal/proto';
import * as util from '../../../internal/util';
import { HybridEncrypt } from '../hybrid_encrypt';
import { HpkeEncrypt } from './hpke_encrypt';
/**
 * This class corresponds to the 'HpkePrivateKeyFactory', but it does not
 * support key generation. The 'HpkePrivateKeyFactor'y' should be use to
 * generate new HPKE key pairs.
 * @final
 */
declare class HpkePublicKeyFactory implements keyManager.KeyFactory {
    newKey(keyFormat: PbMessage | Uint8Array): never;
    newKeyData(serializedKeyFormat: Uint8Array): never;
}
/**
 * Key manager that produces new instances of {@link HpkeEncrypt} primitives.
 * @final
 */
export declare class HpkePublicKeyManager implements keyManager.KeyManager<HybridEncrypt> {
    static KEY_TYPE: string;
    private static readonly SUPPORTED_PRIMITIVE;
    static VERSION: number;
    keyFactory: HpkePublicKeyFactory;
    /**
     * Constructs an instance of the 'HybridEncrypt' primitive for a given HPKE
     * public key.
     */
    getPrimitive(primitiveType: util.Constructor<HybridEncrypt>, key: PbKeyData | PbMessage): Promise<HpkeEncrypt>;
    /** Returns true if this KeyManager supports 'HpkePublicKey' key type. */
    doesSupport(keyType: string): boolean;
    /** Returns the URL which identifies the keys managed by this KeyManager. */
    getKeyType(): string;
    /**
     * Returns the type of primitive which can be generated by this KeyManager,
     * i.e. 'HybridEncrypt'
     */
    getPrimitiveType(): typeof HybridEncrypt;
    getVersion(): number;
    getKeyFactory(): HpkePublicKeyFactory;
    private static getKeyProto;
    private static getKeyProtoFromKeyData;
}
export {};