/*
* Copyright (c) 2008-2021 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.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <string.h>
#import "OFRIPEMD160Hash.h"
#import "OFSecureData.h"
#import "OFHashAlreadyCalculatedException.h"
#import "OFOutOfRangeException.h"
#define DIGEST_SIZE 20
#define BLOCK_SIZE 64
OF_DIRECT_MEMBERS
@interface OFRIPEMD160Hash ()
- (void)of_resetState;
@end
#define F(a, b, c) ((a) ^ (b) ^ (c))
#define G(a, b, c) (((a) & (b)) | (~(a) & (c)))
#define H(a, b, c) (((a) | ~(b)) ^ (c))
#define I(a, b, c) (((a) & (c)) | ((b) & ~(c)))
#define J(a, b, c) ((a) ^ ((b) | ~(c)))
static const uint8_t wordOrder[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
};
static const uint8_t wordOrder2[] = {
5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
};
static const uint8_t rotateBits[] = {
11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
};
static const uint8_t rotateBits2[] = {
8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
};
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]);
#endif
}
static void
processBlock(uint32_t *state, uint32_t *buffer)
{
uint32_t new[5], new2[5];
uint_fast8_t i = 0;
new[0] = new2[0] = state[0];
new[1] = new2[1] = state[1];
new[2] = new2[2] = state[2];
new[3] = new2[3] = state[3];
new[4] = new2[4] = state[4];
byteSwapVectorIfBE(buffer, 16);
#define LOOP_BODY(f, g, k, k2) \
{ \
uint32_t tmp; \
\
tmp = new[0] + f(new[1], new[2], new[3]) + \
buffer[wordOrder[i]] + k; \
tmp = OF_ROL(tmp, rotateBits[i]) + new[4]; \
\
new[0] = new[4]; \
new[4] = new[3]; \
new[3] = OF_ROL(new[2], 10); \
new[2] = new[1]; \
new[1] = tmp; \
\
tmp = new2[0] + g(new2[1], new2[2], new2[3]) + \
buffer[wordOrder2[i]] + k2; \
tmp = OF_ROL(tmp, rotateBits2[i]) + new2[4]; \
\
new2[0] = new2[4]; \
new2[4] = new2[3]; \
new2[3] = OF_ROL(new2[2], 10); \
new2[2] = new2[1]; \
new2[1] = tmp; \
}
for (; i < 16; i++)
LOOP_BODY(F, J, 0x00000000, 0x50A28BE6)
for (; i < 32; i++)
LOOP_BODY(G, I, 0x5A827999, 0x5C4DD124)
for (; i < 48; i++)
LOOP_BODY(H, H, 0x6ED9EBA1, 0x6D703EF3)
for (; i < 64; i++)
LOOP_BODY(I, G, 0x8F1BBCDC, 0x7A6D76E9)
for (; i < 80; i++)
LOOP_BODY(J, F, 0xA953FD4E, 0x00000000)
#undef LOOP_BODY
new2[3] += state[1] + new[2];
state[1] = state[2] + new[3] + new2[4];
state[2] = state[3] + new[4] + new2[0];
state[3] = state[4] + new[0] + new2[1];
state[4] = state[0] + new[1] + new2[2];
state[0] = new2[3];
}
@implementation OFRIPEMD160Hash
@synthesize calculated = _calculated;
@synthesize allowsSwappableMemory = _allowsSwappableMemory;
+ (size_t)digestSize
{
return DIGEST_SIZE;
}
+ (size_t)blockSize
{
return BLOCK_SIZE;
}
+ (instancetype)hashWithAllowsSwappableMemory: (bool)allowsSwappableMemory
{
return [[[self alloc] initWithAllowsSwappableMemory:
allowsSwappableMemory] autorelease];
}
- (instancetype)initWithAllowsSwappableMemory: (bool)allowsSwappableMemory
{
self = [super init];
@try {
_iVarsData = [[OFSecureData alloc]
initWithCount: sizeof(*_iVars)
allowsSwappableMemory: allowsSwappableMemory];
_iVars = _iVarsData.mutableItems;
_allowsSwappableMemory = allowsSwappableMemory;
[self of_resetState];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)of_init
{
return [super init];
}
- (void)dealloc
{
[_iVarsData release];
[super dealloc];
}
- (size_t)digestSize
{
return DIGEST_SIZE;
}
- (size_t)blockSize
{
return BLOCK_SIZE;
}
- (id)copy
{
OFRIPEMD160Hash *copy = [[OFRIPEMD160Hash alloc] of_init];
copy->_iVarsData = [_iVarsData copy];
copy->_iVars = copy->_iVarsData.mutableItems;
copy->_allowsSwappableMemory = _allowsSwappableMemory;
copy->_calculated = _calculated;
return copy;
}
- (void)of_resetState
{
_iVars->state[0] = 0x67452301;
_iVars->state[1] = 0xEFCDAB89;
_iVars->state[2] = 0x98BADCFE;
_iVars->state[3] = 0x10325476;
_iVars->state[4] = 0xC3D2E1F0;
}
- (void)updateWithBuffer: (const void *)buffer_ length: (size_t)length
{
const unsigned char *buffer = buffer_;
if (_calculated)
@throw [OFHashAlreadyCalculatedException
exceptionWithObject: self];
if (length > SIZE_MAX / 8)
@throw [OFOutOfRangeException exception];
_iVars->bits += (length * 8);
while (length > 0) {
size_t min = 64 - _iVars->bufferLength;
if (min > length)
min = length;
memcpy(_iVars->buffer.bytes + _iVars->bufferLength,
buffer, min);
_iVars->bufferLength += min;
buffer += min;
length -= min;
if (_iVars->bufferLength == 64) {
processBlock(_iVars->state, _iVars->buffer.words);
_iVars->bufferLength = 0;
}
}
}
- (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,
64 - _iVars->bufferLength - 1);
if (_iVars->bufferLength >= 56) {
processBlock(_iVars->state, _iVars->buffer.words);
of_explicit_memset(_iVars->buffer.bytes, 0, 64);
}
_iVars->buffer.words[14] =
OF_BSWAP32_IF_BE((uint32_t)(_iVars->bits & 0xFFFFFFFF));
_iVars->buffer.words[15] =
OF_BSWAP32_IF_BE((uint32_t)(_iVars->bits >> 32));
processBlock(_iVars->state, _iVars->buffer.words);
of_explicit_memset(&_iVars->buffer, 0, sizeof(_iVars->buffer));
byteSwapVectorIfBE(_iVars->state, 5);
_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));
_iVars->bufferLength = 0;
_calculated = false;
}
@end