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/**
* Copyright 2017 Google Inc.
*
* 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.
*
**************************************************************************
*/
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
/**
* Protocol for MACs (Message Authentication Codes).
* Instances that conform to this protocol should be used for authentication only and not for other
* purposes (e.g., it should not be used to generate pseudorandom bytes).
*/
@protocol TINKMac
/* Computes and returns the message authentication code (MAC) for @c data. */
- (nullable NSData *)computeMacForData:(NSData *)data error:(NSError **)error;
/**
* Verifies if @c mac is a correct authentication code (MAC) for @c data.
* Returns YES if @c mac is correct, NO otherwise.
*/
- (BOOL)verifyMac:(NSData *)mac forData:(NSData *)data error:(NSError **)error;
@end
NS_ASSUME_NONNULL_END