/**
 * Copyright 2019 Google LLC. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/// <reference types="node" />
export interface JwkCertificate {
    kty: string;
    alg: string;
    use?: string;
    kid: string;
    n: string;
    e: string;
}
export interface CryptoSigner {
    update(data: string): void;
    sign(key: string, outputFormat: string): string;
}
export interface Crypto {
    sha256DigestBase64(str: string): Promise<string>;
    randomBytesBase64(n: number): string;
    verify(pubkey: string | JwkCertificate, data: string | Buffer, signature: string): Promise<boolean>;
    sign(privateKey: string | JwkCertificate, data: string | Buffer): Promise<string>;
    decodeBase64StringUtf8(base64: string): string;
    encodeBase64StringUtf8(text: string): string;
}
export declare function createCrypto(): Crypto;
export declare function hasBrowserCrypto(): boolean;