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#define I(a, b, c, d) ((b) ^ (c) ^ (d))
static OF_INLINE void
byteSwapVectorIfLE(uint32_t *vector, uint_fast8_t length)
{
#ifndef 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[5];
uint_fast8_t i;
new[0] = state[0];
new[1] = state[1];
new[2] = state[2];
new[3] = state[3];
new[4] = state[4];
byteSwapVectorIfLE(buffer, 16);
for (i = 16; i < 80; i++) {
uint32_t tmp = buffer[i - 3] ^ buffer[i - 8] ^
buffer[i - 14] ^ buffer[i - 16];
buffer[i] = OF_ROL(tmp, 1);
buffer[i] = OFRotateLeft(tmp, 1);
}
#define LOOP_BODY(f, k) \
{ \
uint32_t tmp = OF_ROL(new[0], 5) + \
uint32_t tmp = OFRotateLeft(new[0], 5) + \
f(new[0], new[1], new[2], new[3]) + \
new[4] + k + buffer[i]; \
new[4] = new[3]; \
new[3] = new[2]; \
new[2] = OF_ROL(new[1], 30); \
new[2] = OFRotateLeft(new[1], 30); \
new[1] = new[0]; \
new[0] = tmp; \
}
for (i = 0; i < 20; i++)
LOOP_BODY(F, 0x5A827999)
for (; i < 40; i++)
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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_LE((uint32_t)(_iVars->bits >> 32));
OFToBigEndian32((uint32_t)(_iVars->bits >> 32));
_iVars->buffer.words[15] =
OF_BSWAP32_IF_LE((uint32_t)(_iVars->bits & 0xFFFFFFFF));
OFToBigEndian32((uint32_t)(_iVars->bits & 0xFFFFFFFF));
processBlock(_iVars->state, _iVars->buffer.words);
of_explicit_memset(&_iVars->buffer, 0, sizeof(_iVars->buffer));
OFZeroMemory(&_iVars->buffer, sizeof(_iVars->buffer));
byteSwapVectorIfLE(_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));
OFZeroMemory(&_iVars->buffer, sizeof(_iVars->buffer));
_iVars->bufferLength = 0;
_calculated = false;
}
@end
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