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/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
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/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
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#import "OFSecureData.h"
#import "OFHashAlreadyCalculatedException.h"
#import "OFInvalidArgumentException.h"
@implementation OFHMAC
@synthesize hashClass = _hashClass;
+ (instancetype)HMACWithHashClass: (Class <OFCryptoHash>)class
{
return [[[self alloc] initWithHashClass: class] autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithHashClass: (Class <OFCryptoHash>)class
{
self = [super init];
_hashClass = class;
return self;
}
- (void)dealloc
{
[_outerHash release];
[_innerHash release];
[_outerHashCopy release];
[_innerHashCopy release];
[super dealloc];
}
- (void)setKey: (const void *)key
length: (size_t)length
{
void *pool = objc_autoreleasePoolPush();
size_t blockSize = [_hashClass blockSize];
OFSecureData *outerKeyPad = [OFSecureData dataWithCount: blockSize];
OFSecureData *innerKeyPad = [OFSecureData dataWithCount: blockSize];
unsigned char *outerKeyPadItems = outerKeyPad.mutableItems;
unsigned char *innerKeyPadItems = innerKeyPad.mutableItems;
[_outerHash release];
[_innerHash release];
[_outerHashCopy release];
[_innerHashCopy release];
_outerHash = _innerHash = _outerHashCopy = _innerHashCopy = nil;
@try {
if (length > blockSize) {
id <OFCryptoHash> hash = [_hashClass cryptoHash];
[hash updateWithBuffer: key
length: length];
length = hash.digestSize;
if OF_UNLIKELY (length > blockSize)
length = blockSize;
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#import "OFSecureData.h"
#import "OFHashAlreadyCalculatedException.h"
#import "OFInvalidArgumentException.h"
@implementation OFHMAC
@synthesize hashClass = _hashClass;
@synthesize allowsSwappableMemory = _allowsSwappableMemory;
+ (instancetype)HMACWithHashClass: (Class <OFCryptoHash>)class
allowsSwappableMemory: (bool)allowsSwappableMemory
{
return [[[self alloc] initWithHashClass: class
allowsSwappableMemory: allowsSwappableMemory]
autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithHashClass: (Class <OFCryptoHash>)class
allowsSwappableMemory: (bool)allowsSwappableMemory
{
self = [super init];
_hashClass = class;
_allowsSwappableMemory = allowsSwappableMemory;
return self;
}
- (void)dealloc
{
[_outerHash release];
[_innerHash release];
[_outerHashCopy release];
[_innerHashCopy release];
[super dealloc];
}
- (void)setKey: (const void *)key
length: (size_t)length
{
void *pool = objc_autoreleasePoolPush();
size_t blockSize = [_hashClass blockSize];
OFSecureData *outerKeyPad = [OFSecureData
dataWithCount: blockSize
allowsSwappableMemory: _allowsSwappableMemory];
OFSecureData *innerKeyPad = [OFSecureData
dataWithCount: blockSize
allowsSwappableMemory: _allowsSwappableMemory];
unsigned char *outerKeyPadItems = outerKeyPad.mutableItems;
unsigned char *innerKeyPadItems = innerKeyPad.mutableItems;
[_outerHash release];
[_innerHash release];
[_outerHashCopy release];
[_innerHashCopy release];
_outerHash = _innerHash = _outerHashCopy = _innerHashCopy = nil;
@try {
if (length > blockSize) {
id <OFCryptoHash> hash = [_hashClass
cryptoHashWithAllowsSwappableMemory:
_allowsSwappableMemory];
[hash updateWithBuffer: key
length: length];
length = hash.digestSize;
if OF_UNLIKELY (length > blockSize)
length = blockSize;
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memset(innerKeyPadItems + length, 0, blockSize - length);
for (size_t i = 0; i < blockSize; i++) {
outerKeyPadItems[i] ^= 0x5C;
innerKeyPadItems[i] ^= 0x36;
}
_outerHash = [[_hashClass cryptoHash] retain];
_innerHash = [[_hashClass cryptoHash] retain];
[_outerHash updateWithBuffer: outerKeyPadItems
length: blockSize];
[_innerHash updateWithBuffer: innerKeyPadItems
length: blockSize];
} @catch (id e) {
[outerKeyPad zero];
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memset(innerKeyPadItems + length, 0, blockSize - length);
for (size_t i = 0; i < blockSize; i++) {
outerKeyPadItems[i] ^= 0x5C;
innerKeyPadItems[i] ^= 0x36;
}
_outerHash = [[_hashClass cryptoHashWithAllowsSwappableMemory:
_allowsSwappableMemory] retain];
_innerHash = [[_hashClass cryptoHashWithAllowsSwappableMemory:
_allowsSwappableMemory] retain];
[_outerHash updateWithBuffer: outerKeyPadItems
length: blockSize];
[_innerHash updateWithBuffer: innerKeyPadItems
length: blockSize];
} @catch (id e) {
[outerKeyPad zero];
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