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<?php
/*
* Copyright 2019 Google LLC
*
* 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.
*/
namespace Google\Auth;
/**
* Describes a class which supports signing arbitrary strings.
*/
interface SignBlobInterface extends FetchAuthTokenInterface
{
/**
* Sign a string using the method which is best for a given credentials type.
*
* @param string $stringToSign The string to sign.
* @param bool $forceOpenssl Require use of OpenSSL for local signing. Does
* not apply to signing done using external services. **Defaults to**
* `false`.
* @return string The resulting signature. Value should be base64-encoded.
*/
public function signBlob($stringToSign, $forceOpenssl = false);
/**
* Returns the current Client Name.
*
* @param callable $httpHandler callback which delivers psr7 request, if
* one is required to obtain a client name.
* @return string
*/
public function getClientName(callable $httpHandler = null);
}