public static void Dekriptimi(string message, bool opa)
{
string[] words = message.Split('.');
var bytes = Convert.FromBase64String(words[0]);
string user = Encoding.UTF8.GetString(bytes);
// Console.WriteLine(user);
byte[] bytes1 = Convert.FromBase64String(words[1]);
//string IV = Encoding.UTF8.GetString(bytes1);
// Console.WriteLine(IV);
// bytes1 = Formovargun(IV);
string path = "C:\\Users\\Lenovo\\Desktop\\Detyra1_DS-Gr-6-master\\ds\\bin\\Debug\\netcoreapp3.0\\keys\\" + user + ".pem";
//Console.WriteLine(path);
if (!File.Exists(path))
{
string s = "Celesi " + user + " nuk ekziston";
// Console.WriteLine("Celesi " + user + " nuk ekziston");
}
else
{
RSACryptoServiceProvider rsaPriv = new RSACryptoServiceProvider();
Chilkat.PrivateKey privKey2 = new Chilkat.PrivateKey();
privKey2.LoadPemFile(path);
string privKeyXml = privKey2.GetXml();
rsaPriv.FromXmlString(privKeyXml);
byte[] dekodimi = Convert.FromBase64String(words[2]);
byte[] decryptedRSA = rsaPriv.Decrypt(dekodimi, false);
byte[] dekodimiDes = Convert.FromBase64String(words[3]);
Console.WriteLine("Marresi: " + user);
Console.WriteLine("Mesazhi: " + Encoding.UTF8.GetString(Desdekriptim(decryptedRSA, bytes1, dekodimiDes)));
if (opa)
{
byte[] dataToverify = Convert.FromBase64String(words[5]);
var Bytes12 = Convert.FromBase64String(words[4]);
string perdoruesi = Encoding.UTF8.GetString(Bytes12);
Console.WriteLine("Derguesi" + perdoruesi);
if (Sign.VerifySignedHash(dataToverify, Desdekriptim(decryptedRSA, bytes1, dekodimiDes), perdoruesi))
{
Console.WriteLine("Nenshkrami eshte valid");
}
}
}
}
public static string GenjeroTokenin(string user)
{
Chilkat.PrivateKey privKey = new Chilkat.PrivateKey();
bool success = privKey.LoadEncryptedPemFile("C:\\Users\\Lenovo\\Desktop\\Detyra1_DS-Gr-6-master\\ds\\bin\\Debug\\netcoreapp3.0\\keys\\" + user + ".pem", "passwd");
if (!success)
{
return("Nuk ekziston Celsi ose nuk mund te hapet");
}
Chilkat.Jwt jwt = new Chilkat.Jwt();
Chilkat.JsonObject jose = new Chilkat.JsonObject();
// Use RS256. Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
success = jose.AppendString("alg", "RS256");
success = jose.AppendString("typ", "JWT");
// Now build the JWT claims (also known as the payload)
Chilkat.JsonObject claims = new Chilkat.JsonObject();
success = claims.AppendString("sub", user);
DateTime aDay = DateTime.Now;
TimeSpan a20min = new System.TimeSpan(0, 0, 20, 0);
DateTime after20minutes = aDay.Add(a20min);
string k = after20minutes.ToString();
success = claims.AppendString("Valid-till", k);
//success = claims.AppendString("aud", "http://example.com");
// Set the timestamp of when the JWT was created to now.
int curDateTime = jwt.GenNumericDate(0);
success = claims.AddIntAt(-1, "iat", curDateTime);
// Set the "not process before" timestamp to now.
success = claims.AddIntAt(-1, "nbf", curDateTime);
// Set the timestamp defining an expiration time (end time) for the token
// to be now + 20 minutes (1200 seconds)
success = claims.AddIntAt(-1, "exp", curDateTime + 1200);
// adding the tme when its not valid
// Produce the smallest possible JWT:
jwt.AutoCompact = true;
// Create the JWT token. This is where the RSA signature is created.
string token = jwt.CreateJwtPk(jose.Emit(), claims.Emit(), privKey);
//Console.WriteLine(token);
return(token);
}
public static void Createuser(string user)
{
Connectimimedb.InsertStudent(user);
Chilkat.Global glob = new Chilkat.Global();
Chilkat.Rsa rsa = new Chilkat.Rsa();
glob.UnlockBundle("hELLOW");
// Generate a 1024-bit key. Chilkat RSA supports
// key sizes ranging from 512 bits to 4096 bits.
bool success = rsa.GenerateKey(1024);
if (success != true)
{
Console.WriteLine(rsa.LastErrorText);
return;
}
// Keys are exported in XML format:
string publicKeyXml = rsa.ExportPublicKey();
string privateKeyXml = rsa.ExportPrivateKey();
// Save the private key in PEM format:
Chilkat.PrivateKey privKey = new Chilkat.PrivateKey();
success = privKey.LoadXml(privateKeyXml);
success = privKey.SaveRsaPemFile("C:\\Users\\Lenovo\\Desktop\\Detyra1_DS-Gr-6-master\\ds\\bin\\Debug\\netcoreapp3.0\\keys\\" + user + ".pem");
Console.WriteLine("Eshte krijuar qelesi privat " + "keys\\" + user + ".pem");
// Save the public key in PEM format:
Chilkat.PublicKey pubKey = new Chilkat.PublicKey();
success = pubKey.LoadXml(publicKeyXml);
success = pubKey.SaveOpenSslPemFile("C:\\Users\\Lenovo\\Desktop\\Detyra1_DS-Gr-6-master\\ds\\bin\\Debug\\netcoreapp3.0\\keys\\" + user + ".pub.pem");
Console.WriteLine("Eshte krijuar qelesi public " + "keys\\" + user + ".pub.pem");
}
public static void exportKey(string type, string name, string path)
{
string path1 = "C:\\Users\\Lenovo\\Desktop\\Detyra1_DS-Gr-6-master\\ds\\bin\\Debug\\netcoreapp3.0\\keys\\" + name + ".pem";
string path2 = "C:\\Users\\Lenovo\\Desktop\\Detyra1_DS-Gr-6-master\\ds\\bin\\Debug\\netcoreapp3.0\\keys\\" + name + ".pub.pem";
if ((type == "private"))
{
if (!File.Exists(path1))
{
Console.WriteLine("celesi nuk ekziston");
}
else if (path == "")
{
//XElement file = XElement.Load(@path1);
Chilkat.PrivateKey pkey = new Chilkat.PrivateKey();
pkey.LoadPem(path1);
string pkeyXml;
// Get the private key in XML format:
pkeyXml = pkey.GetXml();
Console.WriteLine(pkeyXml);
}
else
{
XElement file = XElement.Load(@path1);
//Console.WriteLine(file);
file.Save("keys1\\" + name + ".xml");
file.Save(path);
Console.WriteLine("celsi u ruajt ne folderin key1");
}
}
else if (type == "public")
{
if (!File.Exists(path2))
{
Console.WriteLine("celesi nuk ekziston");
}
else if (path == "")
{
XElement file = XElement.Load(@path1);
Console.WriteLine(file);
//XElement file = XElement.Load(@path1);
Chilkat.PublicKey pukey = new Chilkat.PublicKey();
pukey.LoadOpenSslPemFile(path1);
string pkeyXml;
// Get the private key in XML format:
pkeyXml = pukey.GetXml();
Console.WriteLine(pkeyXml);
}
else
{
XElement file = XElement.Load(@path1);
//Console.WriteLine(file);
file.Save("key1\\" + name + ".pub.xml");
file.Save(path);
Console.WriteLine("celsi u ruajt ne folderin key1");
//XmlDocument FILE = new XmlDocument();
//FILE.LoadXml(file);
//FILE.Save("C:\\keys1\\" + name + ".pub.xml");
//
}
}
else
{
Console.WriteLine("Operacioni qe keni kerkuar nuk mund te mundesohet");
shfaq();
}
}
