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#import "OFHashAlreadyCalculatedException.h"
#import "OFInvalidArgumentException.h"
@implementation OFHMAC
@synthesize hashClass = _hashClass;
@synthesize allowsSwappableMemory = _allowsSwappableMemory;
+ (instancetype)HMACWithHashClass: (Class <OFCryptoHash>)class
+ (instancetype)HMACWithHashClass: (Class <OFCryptographicHash>)class
allowsSwappableMemory: (bool)allowsSwappableMemory
{
return [[[self alloc] initWithHashClass: class
allowsSwappableMemory: allowsSwappableMemory]
autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithHashClass: (Class <OFCryptoHash>)class
- (instancetype)initWithHashClass: (Class <OFCryptographicHash>)class
allowsSwappableMemory: (bool)allowsSwappableMemory
{
self = [super init];
_hashClass = class;
_allowsSwappableMemory = allowsSwappableMemory;
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[_innerHash release];
[_outerHashCopy release];
[_innerHashCopy release];
_outerHash = _innerHash = _outerHashCopy = _innerHashCopy = nil;
@try {
if (length > blockSize) {
id <OFCryptoHash> hash = [_hashClass
cryptoHashWithAllowsSwappableMemory:
id <OFCryptographicHash> hash = [_hashClass
hashWithAllowsSwappableMemory:
_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 cryptoHashWithAllowsSwappableMemory:
_outerHash = [[_hashClass hashWithAllowsSwappableMemory:
_allowsSwappableMemory] retain];
_innerHash = [[_hashClass cryptoHashWithAllowsSwappableMemory:
_innerHash = [[_hashClass hashWithAllowsSwappableMemory:
_allowsSwappableMemory] retain];
[_outerHash updateWithBuffer: outerKeyPadItems
length: blockSize];
[_innerHash updateWithBuffer: innerKeyPadItems
length: blockSize];
} @catch (id e) {
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