static void Signing()
{
bool check;
int keyNumber;
do
{
check = false;
Console.Write("Please choose the private key number for signing[0..7]):\n\n>");
keyNumber = Validation.InputValue();
if (keyNumber < 0 || keyNumber > 7)
{
check = true;
}
} while (check);
Directory.CreateDirectory($"C:\\LamportSignature");
Directory.CreateDirectory($"C:\\LamportSignature\\privateKeys");
Directory.CreateDirectory($"C:\\LamportSignature\\hashedKeys");
Directory.CreateDirectory($"C:\\LamportSignature\\debug");
string privateKeyPath = $"C:\\LamportSignature\\privateKey.txt";
string publicKeyPath = $"C:\\LamportSignature\\publicKey.txt";
string signaturePath = $"C:\\LamportSignature\\signature.txt";
string lineSeparated = $"--------------------------------------";
File.Delete(signaturePath);
List <int> randomValues;
Console.WriteLine("Generating random values...\n");
randomValues = RandomValueGenerator.GetRandomValue(0, 1000000);
int rv = 0;
List <string[, ]> publicKeys = new List <string[, ]>();
List <string[, ]> privateKeys = new List <string[, ]>();
signature = new string[256];
publicKey = new string[256, 2];
while (privateKeys.Count <= 7)
{
privateKey = new string[256, 2];
for (int i = 0; i <= 255; i++)
{
for (int j = 0; j <= 1; j++)
{
privateKey[i, j] = randomValues[rv].ToString();
rv++;
}
}
privateKeys.Add(privateKey);
}
int fileNumber = 0;
foreach (var item in privateKeys)
{
using (StreamWriter sw = new StreamWriter($"C:\\LamportSignature\\privateKeys\\privateKey_" + fileNumber + ".txt", false, Encoding.Default))
{
for (int i = 0; i <= 255; i++)
{
for (int j = 0; j <= 1; j++)
{
sw.Write(item[i, j] + " | ");
}
sw.WriteLine();
}
}
fileNumber++;
}
foreach (var item in privateKeys)
{
string[,] buffer = new string[256, 2];
for (int i = 0; i <= 255; i++)
{
for (int j = 0; j <= 1; j++)
{
buffer[i, j] = item[i, j].GetHashCode().ToString();
}
}
publicKeys.Add(buffer);
}
fileNumber = 0;
foreach (var item in publicKeys)
{
using (StreamWriter sw = new StreamWriter($"C:\\LamportSignature\\hashedKeys\\hashedKey_" + fileNumber + ".txt", false, Encoding.Default))
{
for (int i = 0; i <= 255; i++)
{
for (int j = 0; j <= 1; j++)
{
sw.Write(item[i, j] + " | ");
}
sw.WriteLine();
}
}
fileNumber++;
}
string[,] selectedHashedKey = publicKeys[keyNumber];
using (StreamWriter sw = new StreamWriter($"C:\\LamportSignature\\hashedKey.txt", false, Encoding.Default))
{
for (int i = 0; i <= 255; i++)
{
for (int j = 0; j <= 1; j++)
{
sw.Write(selectedHashedKey[i, j] + " | ");
}
sw.WriteLine();
}
}
using (FileStream fstream = File.OpenRead($"C:\\LamportSignature\\sourceFile.txt"))
{
sourceFile = new byte[fstream.Length];
fstream.Read(sourceFile, 0, sourceFile.Length);
}
sourceFile = sha256.ComputeHash(sourceFile);
bitsArraySourceFile = new BitArray(sourceFile);
string[,] selectedKey = privateKeys[keyNumber];
for (int i = 0; i <= 255; i++)
{
if (bitsArraySourceFile[i]) //true
{
signature[i] = selectedKey[i, 0];
}
if (!bitsArraySourceFile[i]) //false
{
signature[i] = selectedKey[i, 1];
}
}
using (StreamWriter sw = new StreamWriter(signaturePath, true, Encoding.Default))
{
for (int i = 0; i <= 255; i++)
{
sw.WriteLine(signature[i]);
}
sw.WriteLine(lineSeparated);
sw.Close();
}
string[,] pubKey = MerkleTree.MerkleTreeMake(publicKeys, keyNumber);
Console.WriteLine($"Your file is signed. All files are saved along the path: C:\\LamportSignature\n");
}
static void CheckSigning()
{
publicKey = new string[256, 2];
string[] sign = new string[256];
string[] publicKeyHash = new string[256];
string[] authNotParsed0 = new string[256];
string[] authNotParsed1 = new string[256];
string[] authNotParsed2 = new string[256];
string[,] auth0 = new string[256, 2];
string[,] auth1 = new string[256, 2];
string[,] auth2 = new string[256, 2];
List <string[, ]> authList = new List <string[, ]>();
using (FileStream fstream = File.OpenRead($"C:\\LamportSignature\\sourceFile.txt"))
{
sourceFile = new byte[fstream.Length];
fstream.Read(sourceFile, 0, sourceFile.Length);
}
sourceFile = sha256.ComputeHash(sourceFile);
bitsArraySourceFile = new BitArray(sourceFile);
string[,] topHash = new string[256, 2];
string[] readHashedKey = File.ReadAllLines($"C:\\LamportSignature\\hashedKey.txt");
string[] readSignature = File.ReadAllLines($"C:\\LamportSignature\\signature.txt");
int keyNumber = Convert.ToInt32(readSignature[readSignature.Length - 1]);
for (int i = 0; i <= 255; i++)
{
sign[i] = readSignature[i];
var bufferTopHash = readSignature[i + 257].Split(' ');
topHash[i, 0] = bufferTopHash[0];
topHash[i, 1] = bufferTopHash[2];
var buffer = readSignature[i + 514].Split(' ');
auth0[i, 0] = buffer[0];
auth0[i, 1] = buffer[2];
buffer = readSignature[i + 771].Split(' ');
auth1[i, 0] = buffer[0];
auth1[i, 1] = buffer[2];
buffer = readSignature[i + 1028].Split(' ');
auth2[i, 0] = buffer[0];
auth2[i, 1] = buffer[2];
}
for (int i = 0; i <= 255; i++)
{
var buffer = readHashedKey[i].Split(' ');
publicKey[i, 0] = buffer[0];
publicKey[i, 1] = buffer[2];
}
string[] conformitySourceFileFromPublicKey = new string[256];
for (int i = 0; i <= 255; i++)
{
if (bitsArraySourceFile[i]) //true
{
conformitySourceFileFromPublicKey[i] = publicKey[i, 0];
}
if (!bitsArraySourceFile[i]) //false
{
conformitySourceFileFromPublicKey[i] = publicKey[i, 1];
}
publicKeyHash[i] = sign[i].GetHashCode().ToString();
}
authList.Add(auth0);
authList.Add(auth1);
authList.Add(auth2);
if (conformitySourceFileFromPublicKey.SequenceEqual(publicKeyHash))
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Signature for file verified.\n");
if (MerkleTree.CheckHash(publicKey, authList, topHash, keyNumber))
{
Console.WriteLine("Validated in the block system.\n");
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Validated not passed in the block system. =(\n");
}
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Signature for file not verified. =(\n");
}
Console.ForegroundColor = ConsoleColor.White;
}