/**
 * Copyright (c) 2020 TypeFox GmbH. All rights reserved.
 * Licensed under the GNU Affero General Public License (AGPL).
 * See License-AGPL.txt in the project root for license information.
 */
/// <reference types="node" />
export interface KeyMetadata {
    name: string;
    version: number;
}
export interface Key {
    metadata: KeyMetadata;
    material: Buffer;
}
export declare const KeyProvider: unique symbol;
export interface KeyProvider {
    getPrimaryKey(): Key;
    getKeyFor(metadata: KeyMetadata): Key;
}
export declare type KeyConfig = KeyMetadata & {
    /** base64 encoded */
    material: string;
    primary?: boolean;
};
export declare const KeyProviderConfig: unique symbol;
export interface KeyProviderConfig {
    keys: KeyConfig[];
}
export declare class KeyProviderImpl implements KeyProvider {
    protected readonly config: KeyProviderConfig;
    static loadKeyConfigFromJsonString(configStr: string): KeyConfig[];
    constructor(config: KeyProviderConfig);
    protected readonly keys: KeyConfig[];
    getPrimaryKey(): Key;
    getKeyFor(metadata: KeyMetadata): Key;
    protected configToKey(config: KeyConfig): Key;
}
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