/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { PbKeyData, PbMessage } from './proto';
import { Constructor } from './util';
/**
 * An auxiliary container for methods that generate new keys.
 * Those methods are separate from KeyManager as their functionality is
 * independent of the primitive of the corresponding KeyManager.
 *
 */
export interface KeyFactory {
    /**
     * Generates a new random key according to 'keyFormat'.
     *
     * @param keyFormat is either a KeyFormat
     *     proto or a serialized KeyFormat proto
     * @return the new generated key
     */
    newKey(keyFormat: PbMessage | Uint8Array): PbMessage | Promise<PbMessage>;
    /**
     * Generates a new random key based on the "serialized_key_format" and returns
     * it as a KeyData proto.
     *
     */
    newKeyData(serializedKeyFormat: Uint8Array): PbKeyData | Promise<PbKeyData>;
    /**
     * Returns a public key data extracted from the given serialized private key.
     *
     */
    getPublicKeyData?: (serializedPrivateKey: Uint8Array) => PbKeyData;
}
export interface PrivateKeyFactory extends KeyFactory {
    getPublicKeyData(serializedPrivateKey: Uint8Array): PbKeyData;
}
/**
 * A KeyManager "understands" keys of a specific key type: it can generate keys
 * of the supported type and create primitives for supported keys.
 * A key type is identified by the global name of the protocol buffer that holds
 * the corresponding key material, and is given by typeUrl-field of
 * KeyData-protocol buffer.
 *
 * The template parameter P denotes the primitive corresponding to the keys
 * handled by this manager.
 */
export interface KeyManager<P> {
    /**
     * Constructs an instance of primitive P for a given key.
     *
     * @param key is either a KeyData proto or a supported
     *     key proto
     */
    getPrimitive(primitiveType: Constructor<P>, key: PbKeyData | PbMessage): Promise<P>;
    /**
     * Returns true if this KeyManager supports keyType.
     *
     */
    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.
     *
     * This function is specific for javascript to allow verifying that
     * the primitive returned by getPrimitive function implements certain
     * primitive interface (e.g. that the primitive is AEAD).
     *
     */
    getPrimitiveType(): Constructor<P>;
    /**
     * Returns the version of this KeyManager.
     *
     */
    getVersion(): number;
    /**
     * Returns a factory that generates keys of the key type handled by this
     * manager.
     *
     */
    getKeyFactory(): KeyFactory;
}