public int Build(byte[] output, int outputOffset)
{
if (bufferLength > 0)
{
ProcessBuffer();
}
h1 += (h0 >> 26); h0 &= 0x3ffffff;
h2 += (h1 >> 26); h1 &= 0x3ffffff;
h3 += (h2 >> 26); h2 &= 0x3ffffff;
h4 += (h3 >> 26); h3 &= 0x3ffffff;
h0 += (h4 >> 26) * 5; h4 &= 0x3ffffff;
h1 += (h0 >> 26); h0 &= 0x3ffffff;
uint g0, g1, g2, g3, g4, b;
g0 = h0 + 5; b = g0 >> 26; g0 &= 0x3ffffff;
g1 = h1 + b; b = g1 >> 26; g1 &= 0x3ffffff;
g2 = h2 + b; b = g2 >> 26; g2 &= 0x3ffffff;
g3 = h3 + b; b = g3 >> 26; g3 &= 0x3ffffff;
g4 = h4 + b - (1 << 26);
b = (g4 >> 31) - 1;
uint nb = ~b;
h0 = (h0 & nb) | (g0 & b);
h1 = (h1 & nb) | (g1 & b);
h2 = (h2 & nb) | (g2 & b);
h3 = (h3 & nb) | (g3 & b);
h4 = (h4 & nb) | (g4 & b);
ulong f0, f1, f2, f3;
f0 = ((h0) | (h1 << 26)) + (ulong)k0;
f1 = ((h1 >> 6) | (h2 << 20)) + (ulong)k1;
f2 = ((h2 >> 12) | (h3 << 14)) + (ulong)k2;
f3 = ((h3 >> 18) | (h4 << 8)) + (ulong)k3;
Lend.Unpack32((uint)f0, output, outputOffset);
f1 += (f0 >> 32);
Lend.Unpack32((uint)f1, output, outputOffset + 4);
f2 += (f1 >> 32);
Lend.Unpack32((uint)f2, output, outputOffset + 8);
f3 += (f2 >> 32);
Lend.Unpack32((uint)f3, output, outputOffset + 12);
return(BLOCK_SIZE);
}
private static void StateGamma(uint[] state, uint[] buffer, byte[] gamma)
{
RotateChaCha(state, buffer, 20);
Lend.Unpack32(buffer, gamma, 0);
}