public unsafe void Compress20Test()
{
int dataLen = 20;
byte[] data = GetRandomBytes(dataLen);
byte[] expected = ComputeSingleSha(data);
using Sha256Fo sha = new Sha256Fo();
fixed(uint *hPt = &sha.hashState[0], wPt = &sha.w[0])
{
int dIndex = 0;
for (int i = 0; i < 5; i++, dIndex += 4)
{
wPt[i] = (uint)((data[dIndex] << 24) | (data[dIndex + 1] << 16) | (data[dIndex + 2] << 8) | data[dIndex + 3]);
}
wPt[5] = 0b10000000_00000000_00000000_00000000U;
wPt[15] = (uint)dataLen * 8;
sha.Init(hPt);
sha.Compress20(hPt, wPt);
byte[] actual = sha.GetBytes(hPt);
Assert.Equal(expected, actual);
}
}
private unsafe bool Loop15()
{
using Sha512Fo sha512 = new Sha512Fo();
ulong[] ipad = new ulong[80];
ulong[] opad = new ulong[80];
using Sha256Fo sha256 = new Sha256Fo();
var cartesian = CartesianProduct.Create(Enumerable.Repeat(Enumerable.Range(0, 2048), missCount));
fixed(ulong *iPt = ipad, oPt = opad)
fixed(uint *wPt = &sha256.w[0], hPt = &sha256.hashState[0], wrd = &wordIndexes[0])
fixed(int *mi = &missingIndexes[0])
fixed(byte *mnPt = &mnBytes[0])
{
wPt[5] = 0b10000000_00000000_00000000_00000000U;
wPt[15] = 160;
foreach (var item in cartesian)
{
int j = 0;
foreach (var k in item)
{
wrd[mi[j]] = (uint)k;
j++;
}
wPt[0] = wrd[0] << 21 | wrd[1] << 10 | wrd[2] >> 1;
wPt[1] = wrd[2] << 31 | wrd[3] << 20 | wrd[4] << 9 | wrd[5] >> 2;
wPt[2] = wrd[5] << 30 | wrd[6] << 19 | wrd[7] << 8 | wrd[8] >> 3;
wPt[3] = wrd[8] << 29 | wrd[9] << 18 | wrd[10] << 7 | wrd[11] >> 4;
wPt[4] = wrd[11] << 28 | wrd[12] << 17 | wrd[13] << 6 | wrd[14] >> 5;
sha256.Init(hPt);
sha256.Compress20(hPt, wPt);
if ((wrd[14] & 0b1_1111) == hPt[0] >> 27)
{
int mnLen = 0;
for (int i = 0; i < 15; i++)
{
foreach (byte b in wordBytes[wrd[i]])
{
mnPt[mnLen++] = b;
}
mnPt[mnLen++] = SpaceByte;
}
if (SetBip32(sha512, mnPt, --mnLen, iPt, oPt))
{
return(SetResult(mnLen));
}
}
}
}
return(false);
}