private void ProcessBlock(byte[] inputBuffer, uint inputOffset)
{
uint a, b, c, d, e;
count += BLOCK_SIZE_BYTES;
// abc removal would not work on the fields
uint[] _H = this._H;
uint[] buff = this.buff;
InitialiseBuff(buff, inputBuffer, inputOffset);
FillBuff(buff);
a = _H[0];
b = _H[1];
c = _H[2];
d = _H[3];
e = _H[4];
// This function was unrolled because it seems to be doubling our performance with current compiler/VM.
// Possibly roll up if this changes.
// ---- Round 1 --------
int i=0;
while (i < 20)
{
e += ((a << 5) | (a >> 27)) + (((c ^ d) & b) ^ d) + 0x5A827999 + buff[i];
b = (b << 30) | (b >> 2);
d += ((e << 5) | (e >> 27)) + (((b ^ c) & a) ^ c) + 0x5A827999 + buff[i+1];
a = (a << 30) | (a >> 2);
c += ((d << 5) | (d >> 27)) + (((a ^ b) & e) ^ b) + 0x5A827999 + buff[i+2];
e = (e << 30) | (e >> 2);
b += ((c << 5) | (c >> 27)) + (((e ^ a) & d) ^ a) + 0x5A827999 + buff[i+3];
d = (d << 30) | (d >> 2);
a += ((b << 5) | (b >> 27)) + (((d ^ e) & c) ^ e) + 0x5A827999 + buff[i+4];
c = (c << 30) | (c >> 2);
i += 5;
}
// ---- Round 2 --------
while (i < 40)
{
e += ((a << 5) | (a >> 27)) + (b ^ c ^ d) + 0x6ED9EBA1 + buff[i];
b = (b << 30) | (b >> 2);
d += ((e << 5) | (e >> 27)) + (a ^ b ^ c) + 0x6ED9EBA1 + buff[i + 1];
a = (a << 30) | (a >> 2);
c += ((d << 5) | (d >> 27)) + (e ^ a ^ b) + 0x6ED9EBA1 + buff[i + 2];
e = (e << 30) | (e >> 2);
b += ((c << 5) | (c >> 27)) + (d ^ e ^ a) + 0x6ED9EBA1 + buff[i + 3];
d = (d << 30) | (d >> 2);
a += ((b << 5) | (b >> 27)) + (c ^ d ^ e) + 0x6ED9EBA1 + buff[i + 4];
c = (c << 30) | (c >> 2);
i += 5;
}
// ---- Round 3 --------
while (i < 60)
{
e += ((a << 5) | (a >> 27)) + ((b & c) | (b & d) | (c & d)) + 0x8F1BBCDC + buff[i];
b = (b << 30) | (b >> 2);
d += ((e << 5) | (e >> 27)) + ((a & b) | (a & c) | (b & c)) + 0x8F1BBCDC + buff[i + 1];
a = (a << 30) | (a >> 2);
c += ((d << 5) | (d >> 27)) + ((e & a) | (e & b) | (a & b)) + 0x8F1BBCDC + buff[i + 2];
e = (e << 30) | (e >> 2);
b += ((c << 5) | (c >> 27)) + ((d & e) | (d & a) | (e & a)) + 0x8F1BBCDC + buff[i + 3];
d = (d << 30) | (d >> 2);
a += ((b << 5) | (b >> 27)) + ((c & d) | (c & e) | (d & e)) + 0x8F1BBCDC + buff[i + 4];
c = (c << 30) | (c >> 2);
i += 5;
}
// ---- Round 4 --------
while (i < 80)
{
e += ((a << 5) | (a >> 27)) + (b ^ c ^ d) + 0xCA62C1D6 + buff[i];
b = (b << 30) | (b >> 2);
d += ((e << 5) | (e >> 27)) + (a ^ b ^ c) + 0xCA62C1D6 + buff[i + 1];
a = (a << 30) | (a >> 2);
c += ((d << 5) | (d >> 27)) + (e ^ a ^ b) + 0xCA62C1D6 + buff[i + 2];
e = (e << 30) | (e >> 2);
b += ((c << 5) | (c >> 27)) + (d ^ e ^ a) + 0xCA62C1D6 + buff[i + 3];
d = (d << 30) | (d >> 2);
a += ((b << 5) | (b >> 27)) + (c ^ d ^ e) + 0xCA62C1D6 + buff[i + 4];
c = (c << 30) | (c >> 2);
i += 5;
}
_H[0] += a;
_H[1] += b;
_H[2] += c;
_H[3] += d;
_H[4] += e;
}
