public ArmoryService(IReport rep)
{
report = rep;
inputService = new InputService();
calc = new ECCalc();
}
private unsafe bool LoopComp(string key, int missingCount, char missingChar, byte[] expectedHash)
{
int[] missingIndexes = new int[missingCount];
byte[] ba = new byte[32];
for (int i = 0, j = 0; i < ba.Length; i++)
{
int hi, lo;
if (key[i * 2] == missingChar)
{
hi = 0;
missingIndexes[j++] = i * 2;
}
else
{
hi = key[i * 2] - 65;
hi = hi + 10 + ((hi >> 31) & 7);
}
if (key[i * 2 + 1] == '*')
{
lo = 0;
missingIndexes[j++] = i * 2 + 1;
}
else
{
lo = key[i * 2 + 1] - 65;
lo = lo + 10 + ((lo >> 31) & 7) & 0x0f;
}
ba[i] = (byte)(lo | hi << 4);
}
var cartesian = CartesianProduct.Create(Enumerable.Repeat(Enumerable.Range(0, 16), missingCount));
ECCalc calc = new ECCalc();
BigInteger smallVal = new BigInteger(ba, true, true);
EllipticCurvePoint smallPub = calc.MultiplyByG(smallVal);
bool foundAny = false;
Parallel.ForEach(cartesian, (item, loopState) =>
{
Span <byte> temp = new byte[32];
int mis = 0;
foreach (int keyItem in item)
{
int misIndex = missingIndexes[mis];
if (misIndex % 2 == 0)
{
temp[misIndex / 2] |= (byte)(keyItem << 4);
}
else
{
temp[misIndex / 2] |= (byte)keyItem;
}
mis++;
}
BigInteger tempVal = new BigInteger(temp, true, true);
EllipticCurvePoint tempPub = calc.MultiplyByG(tempVal);
EllipticCurvePoint pub = calc.AddChecked(tempPub, smallPub);
byte[] toHash = new byte[33];
toHash[0] = pub.Y.IsEven ? (byte)2 : (byte)3;
byte[] xBytes = pub.X.ToByteArray(true, true);
Buffer.BlockCopy(xBytes, 0, toHash, 33 - xBytes.Length, xBytes.Length);
Hash160 hash = new Hash160();
ReadOnlySpan <byte> actual = hash.ComputeHash(toHash);
if (actual.SequenceEqual(expectedHash))
{
char[] origHex = key.ToCharArray();
int index = 0;
foreach (var keyItem in item)
{
origHex[missingIndexes[index++]] = GetHex(keyItem);
}
report.AddMessageSafe($"Found a key: {new string(origHex)}");
foundAny = true;
loopState.Break();
}
});
if (!foundAny)
{
report.AddMessageSafe("Failed to find any key.");
}
return(foundAny);
}
public Bip32PathService(IReport rep)
{
report = rep;
inputService = new InputService();
calc = new ECCalc();
}