public byte[] ComputeHash(IHashFactory hashFactory)
{
IByteConverter converter = hashFactory.GetByteConverter();
string rawData = converter.ConvertToString(Nonce) + converter.ConvertToString(Sender) + converter.ConvertToString(Recipient) + Amount;
byte[] data = Encoding.ASCII.GetBytes(rawData);
return(hashFactory.GetDigest().GetHash(data));
}
public string FromBase64Bytes(IReadOnlyCollection <byte> input)
{
if (input == null)
{
return(null);
}
var inputString = ByteConverter.ConvertToString(input);
var resultBytes = FromBase64String(inputString);
var result = ByteConverter.ConvertToString(resultBytes);
return(result);
}
public byte[] ComputeHash(IHashFactory hashFactory)
{
IByteConverter converter = hashFactory.GetByteConverter();
IDigest digest = hashFactory.GetDigest();
string data = converter.ConvertToString(Nonce) +
converter.ConvertToString(PreviousHash) +
CreationTime.ToString() +
converter.ConvertToString(MerkleRoot) +
converter.ConvertToString(MinerAddress) +
HashAlgorithmId +
Difficulty;
byte[] rawData = Encoding.ASCII.GetBytes(data);
return(digest.GetHash(rawData));
}
public string Decrypt(string cipherText)
{
if (cipherText == null)
{
throw new ArgumentNullException("cipherText");
}
var hmacSaltBytes = ConvertToUTF8Bytes(ByteConverter, HmacSaltValue);
var cryptKeyBytes = ConvertToUTF8Bytes(ByteConverter, CryptKeyValue);
var cipherTextBytes = ConvertFromBase64String(Base64Converter, cipherText);
var clearBytes = Decrypt(
keyBitSize: KeyBitSize,
blockBitSize: BlockBitSize,
encryptedMessage: cipherTextBytes,
cryptKey: cryptKeyBytes,
authKey: hmacSaltBytes
);
var result = ByteConverter.ConvertToString(clearBytes);
return(result);
}
public void When_ToBase64Bytes_GivenEmpty_ExpectEmpty()
{
// arrange
const string input = "";
const string expected = "";
// act
var actualBytes = _Base64Converter.ToBase64Bytes(input);
var actual = _UTF8Converter.ConvertToString(actualBytes);
// assert
Assert.IsNotNull(actual);
Assert.AreEqual(expected: expected, actual: actual);
}
public void MineBlock(Block block)
{
INonceGenerator nonceGenerator = HashFactory.GetNonceGenerator();
IByteConverter converter = HashFactory.GetByteConverter();
if (Difficulty >= HashFactory.GetDigest().HashLength)
{
throw new ArgumentException("Difficulty can not be greater or equal to hash length.");
}
if (Difficulty <= 0)
{
throw new ArgumentException("Difficulty can not be greater or equal to zero.");
}
byte[] target = new byte[Difficulty];
block.HashAlgorithmId = HashAlgorithmId;
block.Difficulty = Difficulty;
nonceGenerator.Reset();
#region Parallel mining.
CancellationTokenSource tokenSource = new CancellationTokenSource();
object locker = new object();
byte[] solutionNonce = null;
byte[] solutionHash = null;
string immutableData = converter.ConvertToString(block.PreviousHash) +
block.CreationTime.ToString() +
converter.ConvertToString(block.MerkleRoot) +
converter.ConvertToString(block.MinerAddress) +
block.HashAlgorithmId +
block.Difficulty;
try
{
Parallel.ForEach(nonceGenerator, new ParallelOptions()
{
CancellationToken = tokenSource.Token
}, (byte[] nonce) =>
{
IDigest digest = HashFactory.GetDigest();
converter = HashFactory.GetByteConverter();
string dataWithNonce = converter.ConvertToString(nonce) + immutableData;
byte[] rawData = Encoding.ASCII.GetBytes(dataWithNonce);
byte[] hash = digest.GetHash(rawData);
if (hash.Take(Difficulty).SequenceEqual(target))
{
lock (locker)
{
solutionNonce = nonce;
solutionHash = hash;
}
tokenSource.Cancel();
}
});
}
catch (OperationCanceledException)
{
}
block.Nonce = solutionNonce ?? throw new MiningFailureException("Couldn't resolve block", block);
block.Hash = solutionHash;
#endregion
}
