/*
* The contents of this file are subject to the terms of the Common Development and
* Distribution License (the License). You may not use this file except in compliance with the
* License.
*
* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
* specific language governing permission and limitations under the License.
*
* When distributing Covered Software, include this CDDL Header Notice in each file and include
* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
* Header, with the fields enclosed by brackets [] replaced by your own identifying
* information: "Portions copyright [year] [name of copyright owner]".
*
* Copyright 2016 ForgeRock AS.
*/
#include <CommonCrypto/CommonHMAC.h>
#import "FRAHotpOathMechanism.h"
#import "FRAIdentityDatabase.h"
#import "FRAModelObjectProtected.h"
#import "FRAOathCode.h"
@implementation FRAHotpOathMechanism
#pragma mark -
#pragma mark Lifecyle
- (instancetype)initWithDatabase:(FRAIdentityDatabase *)database identityModel:(FRAIdentityModel *)identityModel secretKey:(NSData *)secretKey HMACAlgorithm:(CCHmacAlgorithm)algorithm codeLength:(NSUInteger)codeLenght counter:(u_int64_t)counter {
self = [super initWithDatabase:database identityModel:identityModel];
if (self) {
_secretKey = secretKey;
_algorithm = algorithm;
_codeLength = codeLenght;
_counter = counter;
_version = 1;
}
return self;
}
+ (instancetype)mechanismWithDatabase:(FRAIdentityDatabase *)database identityModel:(FRAIdentityModel *)identityModel secretKey:(NSData *)secretKey HMACAlgorithm:(CCHmacAlgorithm)algorithm codeLength:(NSUInteger)codeLength counter:(u_int64_t)counter {
return [[FRAHotpOathMechanism alloc] initWithDatabase:database identityModel:identityModel secretKey:secretKey HMACAlgorithm:algorithm codeLength:codeLength counter:counter];
}
#pragma mark -
#pragma mark Instance Methods
- (BOOL)generateNextCode:(NSError *__autoreleasing*)error {
NSString *previousCode = _code;
_code = [FRAOathCode hmac:self.algorithm codeLength:self.codeLength key:self.secretKey counter:++_counter];
if ([self.database updateMechanism:self error:error]) {
return YES;
}
_code = previousCode;
return NO;
}
+ (NSString *)mechanismType {
return @"hotp";
}
@end