public static string ComputeHash(int _time, string _PrevHash, string _dataS, string _Owner, string SHA256_Master) // Compute Hash for Block Data
{
string HashPrep = Convert.ToString(_time) + _PrevHash + Convert.ToString(_dataS.Length) + _dataS + Convert.ToString(_Owner.Length) + _Owner;
SHA256 sha = SHA256.Create();
sha.ComputeHash(Encoding.UTF8.GetBytes(HashPrep));
string newHashVal = SharpChainUtils.HashByteArray(sha.Hash);
sha = SHA256.Create();
sha.ComputeHash(Encoding.UTF8.GetBytes(SHA256_Master + newHashVal));
string generatedHash = SharpChainUtils.HashByteArray(sha.Hash);
return(generatedHash);
}
private void WriteBlock(string filename, string data, string owner, string prevHash, int BlockIndex) // (Physical) Write Block to Blockchain
{
if (prevHash == null)
{
prevHash = "0000000000000000000000000000000000000000000000000000000000000000"; // Genesis Hash
}
FileStream fs = File.Open(filename, FileMode.Append);
int time = (int)(DateTime.Now.ToUniversalTime() - new DateTime(1970, 1, 1)).TotalSeconds;
string HashPrep = Convert.ToString(time) + prevHash + Convert.ToString(data.Length) + data + Convert.ToString(owner.Length) + owner;
SHA256 sha = SHA256.Create();
sha.ComputeHash(Encoding.UTF8.GetBytes(HashPrep));
string HashVal = SharpChainUtils.HashByteArray(sha.Hash);
sha = SHA256.Create();
sha.ComputeHash(Encoding.UTF8.GetBytes(SHA256_Master + HashVal));
string MasterHashVal = SharpChainUtils.HashByteArray(sha.Hash);
int bytesDataLength = BitConverter.GetBytes(data.Length).Length;
int bytesOwnerDataLength = BitConverter.GetBytes(owner.Length).Length;
SharpChainBlock block = new SharpChainBlock(time, MasterHashVal, prevHash, data, fs.Name);
SharpChainIndex.UpdateIndex(fs.Name, block, (int)fs.Length, bytesDataLength + data.Length + 139 + bytesOwnerDataLength + owner.Length);
// Write to SharpChain
fs.Write(BitConverter.GetBytes(this.Magic), 0, 3); // Byte: 0
fs.Write(BitConverter.GetBytes(BlockIndex), 0, 1); // Byte: 0
fs.Write(BitConverter.GetBytes('\x01'), 0, 1); // Byte: 4
fs.Write(BitConverter.GetBytes(time), 0, 4); //Byte: 5
fs.Write(BitConverter.GetBytes(data.Length), 0, bytesDataLength); // Byte: 10
fs.Write(Encoding.ASCII.GetBytes(data), 0, data.Length); // Byte: 13 + data.Length
fs.Write(Encoding.ASCII.GetBytes(prevHash), 0, 64); // Byte: 13 + data.Length + 64
fs.Write(Encoding.ASCII.GetBytes(MasterHashVal), 0, 64); // Byte: 13 + data.Length + 128
fs.Write(BitConverter.GetBytes(owner.Length), 0, bytesOwnerDataLength); // Byte: 10
fs.Write(Encoding.ASCII.GetBytes(owner), 0, owner.Length); // Byte: 13 + data.Length
fs.Write(BitConverter.GetBytes('\0'), 0, 1); // Byte: 13 + data.Length + 128 + 1 (END OF BLOCK!)
fs.Flush();
fs.Close();
}