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#import "OFMD5Hash.h"
#import "OFSecureData.h"
#import "OFHashAlreadyCalculatedException.h"
#import "OFOutOfRangeException.h"
#define DIGEST_SIZE 16
#define BLOCK_SIZE 64
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};
static OF_INLINE void
byteSwapVectorIfBE(uint32_t *vector, uint_fast8_t length)
{
#ifdef OF_BIG_ENDIAN
for (uint_fast8_t i = 0; i < length; i++)
vector[i] = OF_BSWAP32(vector[i]);
vector[i] = OFByteSwap32(vector[i]);
#endif
}
static void
processBlock(uint32_t *state, uint32_t *buffer)
{
uint32_t new[4];
uint_fast8_t i = 0;
new[0] = state[0];
new[1] = state[1];
new[2] = state[2];
new[3] = state[3];
byteSwapVectorIfBE(buffer, 16);
#define LOOP_BODY(f) \
{ \
uint32_t tmp = new[3]; \
tmp = new[3]; \
new[0] += f(new[1], new[2], new[3]) + \
buffer[wordOrder[i]] + table[i]; \
new[3] = new[2]; \
new[2] = new[1]; \
new[1] += OF_ROL(new[0], rotateBits[(i % 4) + (i / 16) * 4]); \
new[0] = tmp;\
#define LOOP_BODY(f) \
{ \
uint32_t tmp = new[3]; \
tmp = new[3]; \
new[0] += f(new[1], new[2], new[3]) + \
buffer[wordOrder[i]] + table[i]; \
new[3] = new[2]; \
new[2] = new[1]; \
new[1] += OFRotateLeft(new[0], \
rotateBits[(i % 4) + (i / 16) * 4]); \
new[0] = tmp; \
}
for (; i < 16; i++)
LOOP_BODY(F)
for (; i < 32; i++)
LOOP_BODY(G)
for (; i < 48; i++)
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@implementation OFMD5Hash
@synthesize calculated = _calculated;
@synthesize allowsSwappableMemory = _allowsSwappableMemory;
+ (size_t)digestSize
{
return DIGEST_SIZE;
return digestSize;
}
+ (size_t)blockSize
{
return BLOCK_SIZE;
return blockSize;
}
+ (instancetype)cryptoHashWithAllowsSwappableMemory: (bool)allowsSwappableMemory
+ (instancetype)hashWithAllowsSwappableMemory: (bool)allowsSwappableMemory
{
return [[[self alloc] initWithAllowsSwappableMemory:
allowsSwappableMemory] autorelease];
}
- (instancetype)initWithAllowsSwappableMemory: (bool)allowsSwappableMemory
{
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[_iVarsData release];
[super dealloc];
}
- (size_t)digestSize
{
return DIGEST_SIZE;
return digestSize;
}
- (size_t)blockSize
{
return BLOCK_SIZE;
return blockSize;
}
- (id)copy
{
OFMD5Hash *copy = [[OFMD5Hash alloc] of_init];
copy->_iVarsData = [_iVarsData copy];
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{
_iVars->state[0] = 0x67452301;
_iVars->state[1] = 0xEFCDAB89;
_iVars->state[2] = 0x98BADCFE;
_iVars->state[3] = 0x10325476;
}
- (void)updateWithBuffer: (const void *)buffer_
- (void)updateWithBuffer: (const void *)buffer_ length: (size_t)length
length: (size_t)length
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- (const unsigned char *)digest
{
if (_calculated)
return (const unsigned char *)_iVars->state;
_iVars->buffer.bytes[_iVars->bufferLength] = 0x80;
of_explicit_memset(_iVars->buffer.bytes + _iVars->bufferLength + 1, 0,
OFZeroMemory(_iVars->buffer.bytes + _iVars->bufferLength + 1,
64 - _iVars->bufferLength - 1);
if (_iVars->bufferLength >= 56) {
processBlock(_iVars->state, _iVars->buffer.words);
of_explicit_memset(_iVars->buffer.bytes, 0, 64);
OFZeroMemory(_iVars->buffer.bytes, 64);
}
_iVars->buffer.words[14] =
OF_BSWAP32_IF_BE((uint32_t)(_iVars->bits & 0xFFFFFFFF));
OFToLittleEndian32((uint32_t)(_iVars->bits & 0xFFFFFFFF));
_iVars->buffer.words[15] =
OF_BSWAP32_IF_BE((uint32_t)(_iVars->bits >> 32));
OFToLittleEndian32((uint32_t)(_iVars->bits >> 32));
processBlock(_iVars->state, _iVars->buffer.words);
of_explicit_memset(&_iVars->buffer, 0, sizeof(_iVars->buffer));
OFZeroMemory(&_iVars->buffer, sizeof(_iVars->buffer));
byteSwapVectorIfBE(_iVars->state, 4);
_calculated = true;
return (const unsigned char *)_iVars->state;
}
- (void)reset
{
[self of_resetState];
_iVars->bits = 0;
of_explicit_memset(&_iVars->buffer, 0, sizeof(_iVars->buffer));
OFZeroMemory(&_iVars->buffer, sizeof(_iVars->buffer));
_iVars->bufferLength = 0;
_calculated = false;
}
@end
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