public string Sender(string token, string message, string user, string key, string iv)
{
if (isExpired(token))
{
string msg_des = WR.des_Encrypt(message, key, iv);
string hash = Compute_hash(msg_des);
string msg_sign = Sign_data(hash, user);
string msg_b64 = WR.Base64Encode(msg_sign);
string sender = GetSender(token);
string part4 = sender + "." + msg_b64;
return(part4);
}
else
{
return(null);
}
}
public string GetSender(string token)
{
int indexOfFirstPoint = token.IndexOf('.') + 1;
string toDecode = token.Substring(indexOfFirstPoint, token.LastIndexOf('.') - indexOfFirstPoint);
while (toDecode.Length % 4 != 0)
{
toDecode += '=';
}
string decodedString = Encoding.ASCII.GetString(Convert.FromBase64String(toDecode));
string beginning = "\" User \":\"";
int startPosition = decodedString.LastIndexOf(beginning) + beginning.Length;
decodedString = decodedString.Substring(startPosition);
int endPosition = decodedString.IndexOf("\"");
decodedString = decodedString.Substring(0, endPosition);
string sender = WR.Base64Encode(decodedString);
return(sender);
}
public string Ver_msg(string cipher, string message, string user1, string key, string iv)
{
string msg_des = WR.des_Encrypt(message, key, iv);
string hash = Compute_hash(msg_des);
string msg_sign = Sign_data(hash, user1);
string msg_b64 = WR.Base64Encode(msg_sign);
if (cipher.Equals(msg_b64))
{
bool verify = Verify_sign(hash, msg_sign, user1);
if (verify)
{
return("Nenshkrimi eshte valid.");
}
else
{
return("Nenshkrimi nuk eshte valid!");
}
}
else
{
return("Mesazhi eshte i ndryshuar");
}
}
static void Main(string[] args)
{
if (args.Length > 0)
{
string command = args[0];
RsaEncryptor rsa;
DirectoryInfo di = Directory.CreateDirectory(@"../../../keys/");
if (command == "create-user")
{
try
{
if (args[1].Length != 0)
{
string command2 = args[1];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < command2.Length; i++)
{
if ((command2[i] >= '0' && command2[i] <= '9') || (command2[i] >= 'A' && command2[i] <= 'Z') || (command2[i] >= 'a' && command2[i] <= 'z') || command2[i] == '_')
{
sb.Append(command2[i].ToString());
}
else
{
Console.WriteLine("Emrat duhet të përmbajnë vetëm simbolet A-Z, a-z, 0-9,dhe _");
return;
}
}
command2 = sb.ToString();
rsa = new RsaEncryptor();
string privateKey = rsa.GetPrivateKey();
string publicKey = rsa.GetPublicKey();
string privkey = di + command2 + ".xml";
string pubkey = di + command2 + ".pub.xml";
if (File.Exists(privkey) && File.Exists(pubkey))
{
Console.WriteLine("Gabim: Celesi '" + command2 + "' ekziston paraprakisht.");
return;
}
File.WriteAllText(di + command2 + ".xml", privateKey);
File.WriteAllText(di + command2 + ".pub.xml", publicKey);
Console.WriteLine("Eshte krijuar celsi privat: 'keys/{0}.xml'", command2);
Console.WriteLine("Eshte krijuar celsi publik: 'keys/{0}.pub.xml'", command2);
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: create-user <emri>");
return;
}
}
else if (command == "delete-user")
{
try
{
if (args[1].Length != 0)
{
string command2 = args[1];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < command2.Length; i++)
{
if ((command2[i] >= '0' && command2[i] <= '9') || (command2[i] >= 'A' && command2[i] <= 'Z') || (command2[i] >= 'a' && command2[i] <= 'z') || command2[i] == '_')
{
sb.Append(command2[i].ToString());
}
else
{
Console.WriteLine("Emrat duhet të përmbajnë vetëm simbolet A-Z, a-z, 0-9,dhe _");
return;
}
}
command2 = sb.ToString();
rsa = new RsaEncryptor();
string privateKey = rsa.GetPrivateKey();
string publicKey = rsa.GetPublicKey();
string privkey = di + command2 + ".xml";
string pubkey = di + command2 + ".pub.xml";
if (File.Exists(privkey) && File.Exists(pubkey))
{
File.Delete(privkey);
File.Delete(pubkey);
Console.WriteLine("Eshte larguar celsi privat: 'keys/{0}.xml'", command2);
Console.WriteLine("Eshte larguar celsi publik: 'keys/{0}.pub.xml'", command2);
}
else
{
Console.WriteLine("Gabim: Celesi '" + command2 + "' nuk ekziston.");
}
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: delete-user <emri>");
return;
}
}
else if (command == "export-key")
{
try
{
if (args[1].Length != 0 && args[2].Length != 0)
{
string type = args[1];
string name = args[2];
//DirectoryInfo dir = Directory.CreateDirectory("keys/");
//We have di for directory $top.
string privKeysDir = /*dir*/ di + name + ".xml";
string pubKeysDir = /*dir*/ di + name + ".pub.xml";
if (File.Exists(pubKeysDir) && File.Exists(privKeysDir))
{
if (args.Length == 3)
{
/*if (type == "public")
* {
* string publicKey = File.ReadAllText(di + name + ".pub.xml");
* char[] seperator = { '>' };
* String[] strlist = publicKey.Split(seperator);
* foreach(String s in strlist){Console.Write(s + ">"); Console.WriteLine();}
*
* }*/
if (type == "public")
{
string publicKey = File.ReadAllText(/*dir*/ di + name + ".pub.xml");
publicKey = publicKey.Replace(">", ">" + System.Environment.NewLine);
Console.WriteLine("\n" + publicKey + "\n");
}
else if (type == "private")
{
string privateKey = File.ReadAllText(/*dir*/ di + name + ".xml");
privateKey = privateKey.Replace(">", ">" + System.Environment.NewLine);
Console.WriteLine("\n" + privateKey + "\n");
}
}
else if (args.Length == 4 /*> 3*/)
{
string expFile = args[3];
DirectoryInfo expDir = Directory.CreateDirectory("exported/");
using (StreamWriter strw = File.CreateText(expDir + expFile));
string publicKey = File.ReadAllText(/*dir*/ di + name + ".pub.xml");//
File.WriteAllText(expDir + expFile, publicKey);
Console.WriteLine("Celesi publik u ruajt ne fajllin " + expFile + ".xml");
}
}
else if (File.Exists(pubKeysDir) && !File.Exists(privKeysDir))
{
if (args.Length == 3)
{
if (type == "public")
{
string publicKey = File.ReadAllText(/*dir*/ di + name + ".pub.xml");
Console.WriteLine("\n" + publicKey + "\n");
}
else if (type == "private")
{
//string privateKey = File.ReadAllText(/*dir*/ di + name + ".xml");
Console.WriteLine("\nGabim: Celesi privat " + name + " nuk ekziston\n");
}
}
else if (args.Length == 4 /*> 3*/)
{
string expFile = args[3];
DirectoryInfo expDir = Directory.CreateDirectory("exported/");
using (StreamWriter strw = File.CreateText(expDir + expFile));
string publicKey = File.ReadAllText(/*dir*/ di + name + ".pub.xml");//
File.WriteAllText(expDir + expFile, publicKey);
Console.WriteLine("Celesi publik u ruajt ne fajllin " + expFile);
}
}
else
{
Console.WriteLine("Gabim: Celesi publik " + name + " nuk ekziston.");
}
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: export-key <public|private> <name> dhe [file] opsionale");
}
}
else if (command == "list-keys")//Komande shtese -> listimi i celesave (needs to convert from path name > name:)
{
Dictionary <string, string> list_keys = new Dictionary <string, string>();
string[] fCount = Directory.GetFiles(@"../../../keys/", "*.xml");
foreach (string k in fCount)
{
string val = File.ReadAllText(@k, Encoding.UTF8);
list_keys.Add(k, val);
}
foreach (KeyValuePair <string, string> item in list_keys)
{
Console.WriteLine("Key: {0}, \nValue: {1}\n\n", item.Key, item.Value);
}
}
else if (command == "write-message")
{
string input = args[1];
string pubkey = di + input + ".pub.xml";
DESCryptoServiceProvider objDes = new DESCryptoServiceProvider();
string randKey = Convert.ToBase64String(objDes.Key);
string randiv = Convert.ToBase64String(objDes.IV);
if (File.Exists(pubkey))
{
if (args.Length == 3)
{
string publicKey = File.ReadAllText(di + input + ".pub.xml");
string tekst = args[2];
Console.WriteLine(WR.Base64Encode(input) + "." + WR.Base64Encode(randiv) + "." + WR.rsa_Encrypt(randKey, publicKey) + "." + WR.des_Encrypt(tekst, randKey, randiv));
}
else if (args.Length == 4)
{
string publicKey = File.ReadAllText(di + input + ".pub.xml");
string tekst = args[2];
string file = args[3];
DirectoryInfo di2 = Directory.CreateDirectory(@"../../../files/");
using (StreamWriter sw = File.CreateText(di2 + file));
string g = ("\n" + WR.Base64Encode(input) + "." + WR.Base64Encode(randiv) + "." + WR.rsa_Encrypt(randKey, publicKey) + "." + WR.des_Encrypt(tekst, randKey, randiv));
File.WriteAllText(di2 + file, g);
Console.WriteLine("Mesazhi i enkriptuar u ruajt ne fajllin: files/{0}", file);
}
else
{
Console.WriteLine("Numri i argumenteve nuk eshte valid!");
}
}
else
{
Console.WriteLine("Celesi publik: {0} nuk ekziston ", input);
}
}
else if (command == "read-message")
{
string cipher = args[1];
var array = cipher.Split(new[] { '.' }, 4);
string firstElem = array[0];
string second = array[1];
string third = array[2];
string fourth = array[3];
if (WR.Check_Base64(firstElem) && WR.Check_Base64(second) && WR.Check_Base64(third) && WR.Check_Base64(fourth))
{
string input = WR.Base64Decode(firstElem);
string privkey = di + input + ".xml";
if (File.Exists(privkey))
{
Console.WriteLine("Marresi: " + input);
string privateKey = File.ReadAllText(di + input + ".xml");
try
{
string iv_get = WR.Base64Decode(second);
try
{
string rsaKey_get = WR.rsa_Decrypt(third, privateKey);
try
{
Console.WriteLine("Dekriptimi: " + WR.des_Decrypt(fourth, rsaKey_get, iv_get));
}
catch (Exception)
{
Console.WriteLine("Error: {0}");
}
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e);
}
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e);
}
}
else
{
Console.WriteLine("Celesi privat " + input + " nuk ekziston.");
}
}
else
{
Console.WriteLine("Nuk eshte Base64!");
}
}
//FAZA 1
else if (command == "four-square")
{
try
{
if (args[1] == "encrypt")
{
try
{
string plaintext = args[2];
string key1 = args[3];
string key2 = args[4];
Console.WriteLine("Encryption: " + FS.Encrypt(plaintext, key1, key2));
}
catch (Exception)
{
Console.WriteLine("You should put arguments in this order: <plaintext> <key1> <key2>" +
"\nIf plaintext is a sentence, put them in \"\", key must be one word and contain only letters!");
}
}
else if (args[1] == "decrypt")
{
try
{
string ciphertext = args[2];
string key1 = args[3];
string key2 = args[4];
Console.WriteLine("Decryption: " + FS.Decrypt(ciphertext, key1, key2));
}
catch (Exception)
{
Console.WriteLine("You should put arguments in this order: <ciphertext> <key1> <key2>");
}
}
else
{
Console.WriteLine("Your command should be: <encrypt> or <decrypt> ");
}
}
catch (Exception)
{
Console.WriteLine("COMMANDS: <encrypt> <decrypt>");
}
}
else if (command == "case")
{
try
{
if (args[1] == "lower")
{
string word = args[2];
Console.WriteLine(word.ToLower());
}
else if (args[1] == "upper")
{
string word = args[2];
Console.WriteLine(word.ToUpper());
}
else if (args[1] == "capitalize")
{
string word = args[2];
Console.WriteLine(CASE.Capitalize(word));
}
else if (args[1] == "inverse")
{
string word = args[2];
Console.WriteLine(CASE.Inverse(word));
}
else if (args[1] == "alternating")
{
string word = args[2];
Console.WriteLine(CASE.Alternating(word));
}
else if (args[1] == "sentence")
{
string a = args[2];
Console.Write(a.ToLower() + ", " + CASE.Str2(a) + ". " + a.ToUpper() + "! " + CASE.Str4(a) + ".\n" + CASE.Str5(a) + ", " + a.ToLower() + ". " + CASE.Str7(a) + "! " + CASE.Str8(a) + ".");
}
else
{
Console.WriteLine("Your command was wrong, choice one of the cases: <lower> <upper> <capitalize> <inverse> <alternating> <sentence>");
}
}
catch (Exception)
{
Console.WriteLine("CASES: <lower> <upper> <capitalize> <inverse> <alternating> <sentence> ");
}
}
else if (command == "rail-fence")
{
try
{
if (args[1] == "encrypt")
{
string plaint = args[2];
string rail = args[3];
int railsNr = Int32.Parse(rail);
Console.WriteLine(RF.Rencode(plaint, railsNr));
}
else if (args[1] == "decrypt")
{
string ciphert = args[2];
string rail = args[3];
int railsNr = Int32.Parse(rail);
Console.WriteLine(RF.Rdecode(ciphert, railsNr));
}
else
{
Console.WriteLine("You must choose beetwen: <encrypt> <decrypt>");
}
}
catch (Exception)
{
Console.WriteLine("Continue: <plaintext> <rails>");
}
}
else
{
Console.WriteLine("Kerkesa duhet te jete: <create-user> <delete-user> <write-message> <read-message>");
}
/*else
* {
* Console.WriteLine("You should provide a valid METHOD: <four-square> <case> <rail-fence>");
* }*/
}
}
static void Main(string[] args)
{
if (args.Length > 0)
{
string command = args[0];
RsaEncryptor rsa;
DirectoryInfo di = Directory.CreateDirectory(@"../../../keys/");
Signature sign = new Signature();
if (command == "create-user")
{
try
{
if (args[1].Length != 0)
{
string command2 = args[1];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < command2.Length; i++)
{
if ((command2[i] >= '0' && command2[i] <= '9') || (command2[i] >= 'A' && command2[i] <= 'Z') || (command2[i] >= 'a' && command2[i] <= 'z') || command2[i] == '_')
{
sb.Append(command2[i].ToString());
}
else
{
Console.WriteLine("Emrat duhet të përmbajnë vetëm simbolet A-Z, a-z, 0-9,dhe _");
return;
}
}
command2 = sb.ToString();
rsa = new RsaEncryptor();
string privateKey = rsa.GetPrivateKey();
string publicKey = rsa.GetPublicKey();
string privkey = di + command2 + ".xml";
string pubkey = di + command2 + ".pub.xml";
if (File.Exists(privkey) && File.Exists(pubkey))
{
Console.WriteLine("Gabim: Celesi '" + command2 + "' ekziston paraprakisht.");
return;
}
Console.Write("Jepni fjalekalimin:");
string password = Console.ReadLine();
Match match = Regex.Match(password, @"[0-9]+");
Match match1 = Regex.Match(password, @"[A-Z]+");
Match match2 = Regex.Match(password, @".{6,}");
Match match3 = Regex.Match(password, @"[a-z]+");
Match match4 = Regex.Match(password, @"[!@#$%^&*()_+=\[{\]};:<>|./?,-]");
if (!match.Success)
{
Console.WriteLine("Fjalekalimi duhet te kete se paku nje numer.");
return;
}
else if (!match1.Success)
{
Console.WriteLine("Fjalekalimi duhet te kete se paku nje shkronje te madhe.");
return;
}
else if (!match2.Success)
{
Console.WriteLine("Fjalekalimi duhet te kete se paku 6 karaktere.");
return;
}
else if (!match3.Success)
{
Console.WriteLine("Fjalekalimi duhet te kete se paku nje shkronje te vogel.");
return;
}
else if (!match4.Success)
{
Console.WriteLine("Fjalekalimi duhet te kete se paku nje simbol.");
return;
}
Console.Write("Perserite fjalekalimin:");
string cpassword = Console.ReadLine();
if (cpassword != password)
{
Console.WriteLine("Fjalekalimet nuk perputhen.");
return;
}
byte[] salt = new byte[128 / 8];
using (var rng = RandomNumberGenerator.Create())
{
rng.GetBytes(salt);
}
string Salt = Convert.ToBase64String(salt);
// derive a 256-bit subkey (use HMACSHA1 with 10,000 iterations)
string hashed = Convert.ToBase64String(KeyDerivation.Pbkdf2(
password: password,
salt: salt,
prf: KeyDerivationPrf.HMACSHA1,
iterationCount: 10000,
numBytesRequested: 256 / 8));
string connStr = "server=localhost;user=root;database=ds;port=3306;password=7834";
MySqlConnection conn = new MySqlConnection(connStr);
try
{
Console.Write("");
string instr = "INSERT INTO db (User,Password,Salt) VALUES('" + command2 + "','" + hashed + "','" + Salt + "')";
conn.Open();
MySqlCommand Command = new MySqlCommand(instr, conn);
// Perform database operations
if (Command.ExecuteNonQuery() == 1)
{
Console.Write("");
}
else
{
Console.Write("Failed");
return;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
return;
}
conn.Close();
Console.Write("");
File.WriteAllText(di + command2 + ".xml", privateKey);
File.WriteAllText(di + command2 + ".pub.xml", publicKey);
Console.WriteLine("Eshte krijuar shfrytezuesi '" + command2 + "'");
Console.WriteLine("Eshte krijuar celsi privat: 'keys/{0}.xml'", command2);
Console.WriteLine("Eshte krijuar celsi publik: 'keys/{0}.pub.xml'", command2);
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: create-user <emri>");
return;
}
}
else if (command == "delete-user")
{
try
{
if (args[1].Length != 0)
{
string command2 = args[1];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < command2.Length; i++)
{
if ((command2[i] >= '0' && command2[i] <= '9') || (command2[i] >= 'A' && command2[i] <= 'Z') || (command2[i] >= 'a' && command2[i] <= 'z') || command2[i] == '_')
{
sb.Append(command2[i].ToString());
}
else
{
Console.WriteLine("Emrat duhet të përmbajnë vetëm simbolet A-Z, a-z, 0-9,dhe _");
return;
}
}
command2 = sb.ToString();
rsa = new RsaEncryptor();
string privateKey = rsa.GetPrivateKey();
string publicKey = rsa.GetPublicKey();
string privkey = di + command2 + ".xml";
string pubkey = di + command2 + ".pub.xml";
if (File.Exists(privkey) && File.Exists(pubkey))
{
File.Delete(privkey);
File.Delete(pubkey);
Console.WriteLine("Eshte larguar celsi privat: 'keys/{0}.xml'", command2);
Console.WriteLine("Eshte larguar celsi publik: 'keys/{0}.pub.xml'", command2);
}
else
{
Console.WriteLine("Gabim: Celesi '" + command2 + "' nuk ekziston.");
}
string connStr = "server=localhost;user=root;database=ds;port=3306;password=7834";
MySqlConnection conn = new MySqlConnection(connStr);
try
{
Console.Write("");
string instr = "DELETE FROM db WHERE User='******'";
conn.Open();
MySqlCommand Command = new MySqlCommand(instr, conn);
// Perform database operations
if (Command.ExecuteNonQuery() == 1)
{
Console.Write("");
}
else
{
Console.Write("Failed");
return;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
return;
}
conn.Close();
Console.Write("");
Console.WriteLine("Eshte fshire shfrytezuesi '" + command2 + "'");
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: delete-user <emri>");
return;
}
}
///
else if (command == "login")
{
try
{
if (args[1].Length != 0)
{
string privKD = di + args[1] + ".xml";
string pubKD = di + args[1] + ".pub.xml";
Console.Write("Jepni fjalekalimin:");
string password = Console.ReadLine();
Login_user.Login(args[1], password);
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: login <username>");
return;
}
}
else if (command == "status")
{
try
{
if (args[1].Length != 0)
{
Login_user.Status(args[1]);
if (sign.isExpired(args[1]))
{
Console.WriteLine("'Valid' : 'Po'");
}
else
{
Console.WriteLine("'Valid' : 'Jo'");
}
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: status <token>");
return;
}
}
else if (command == "write-message")
{
string input = args[1];
string pubkey = di + input + ".pub.xml";
DESCryptoServiceProvider objDes = new DESCryptoServiceProvider();
string randKey = Convert.ToBase64String(objDes.Key);
string randiv = Convert.ToBase64String(objDes.IV);
if (File.Exists(pubkey))
{
if (args.Length == 3)
{
string publicKey = File.ReadAllText(di + input + ".pub.xml");
string tekst = args[2];
Console.WriteLine(WR.Base64Encode(input) + "." + WR.Base64Encode(randiv) + "." + WR.rsa_Encrypt(randKey, publicKey) + "." + WR.des_Encrypt(tekst, randKey, randiv));
}
else if (args.Length == 4)
{
string publicKey = File.ReadAllText(di + input + ".pub.xml");
string tekst = args[2];
string token = args[3];
string part4 = sign.Sender(token, tekst, input, randKey, randiv);
string sender = sign.GetSender(token);
Console.WriteLine(WR.Base64Encode(input) + "." + WR.Base64Encode(randiv) + "." + WR.rsa_Encrypt(randKey, publicKey) + "." + WR.des_Encrypt(tekst, randKey, randiv) + "." + part4);
}
else
{
Console.WriteLine("Numri i argumenteve nuk eshte valid!");
}
}
else
{
Console.WriteLine("Celesi publik: {0} nuk ekziston ", input);
}
}
else if (command == "read-message")
{
string cipher = args[1];
if (Regex.Matches(cipher, @"\.").Count == 3)
{
var array = cipher.Split(new[] { '.' }, 4);
string firstElem = array[0];
string second = array[1];
string third = array[2];
string fourth = array[3];
if (WR.Check_Base64(firstElem) && WR.Check_Base64(second) && WR.Check_Base64(third) && WR.Check_Base64(fourth))
{
string input = WR.Base64Decode(firstElem);
string privkey = di + input + ".xml";
if (File.Exists(privkey))
{
Console.WriteLine("Marresi: " + input);
string privateKey = File.ReadAllText(di + input + ".xml");
try
{
string iv_get = WR.Base64Decode(second);
try
{
string rsaKey_get = WR.rsa_Decrypt(third, privateKey);
try
{
Console.WriteLine("Dekriptimi: " + WR.des_Decrypt(fourth, rsaKey_get, iv_get));
}
catch (Exception)
{
Console.WriteLine("Error: {0}");
}
}
catch (CryptographicException)
{
Console.WriteLine("Dekriptimi nuk mund te behet me celesin e dhene");
}
}
catch (Exception)
{
Console.WriteLine("IV nuk eshte e njejte me ate te enkriptimit!");
}
}
else
{
Console.WriteLine("Celesi privat " + input + " nuk ekziston.");
}
}
else
{
Console.WriteLine("Nuk eshte Base64!");
}
}
else if (Regex.Matches(cipher, @"\.").Count == 5)
{
var array = cipher.Split(new[] { '.' }, 6);
string firstElem = array[0];
string second = array[1];
string third = array[2];
string fourth = array[3];
string sender = array[4];
string msg = array[5];
if (WR.Check_Base64(firstElem) && WR.Check_Base64(second) && WR.Check_Base64(third) && WR.Check_Base64(fourth) && WR.Check_Base64(sender) && WR.Check_Base64(msg))
{
string input = WR.Base64Decode(firstElem);
string privkey = di + input + ".xml";
if (File.Exists(privkey))
{
Console.WriteLine("Marresi: " + input);
string privateKey = File.ReadAllText(di + input + ".xml");
try
{
string iv_get = WR.Base64Decode(second);
try
{
string rsaKey_get = WR.rsa_Decrypt(third, privateKey);
string plain = WR.des_Decrypt(fourth, rsaKey_get, iv_get);
Console.WriteLine("Mesazhi: " + plain);
string sender_n = WR.Base64Decode(sender);
Console.WriteLine("Derguesi: {0} ", sender_n);
try
{
string read_msg = sign.Ver_msg(msg, plain, input, rsaKey_get, iv_get);
Console.WriteLine("Validimi: {0}", read_msg);
}
catch (Exception)
{
throw;
}
}
catch (CryptographicException)
{
Console.WriteLine("Dekriptimi nuk mund te behet me celesin e dhene");
}
}
catch (Exception)
{
Console.WriteLine("IV nuk eshte e njejte me ate te enkriptimit!");
}
}
else
{
Console.WriteLine("Celesi privat " + input + " nuk ekziston.");
}
}
else
{
Console.WriteLine("Nuk eshte Base64!");
}
}
else if (File.Exists(cipher))
{
string content = File.ReadAllText(cipher);
if (Regex.Matches(content, @"\.").Count == 3)
{
var array = content.Split(new[] { '.' }, 4);
string firstElem = array[0];
string second = array[1];
string third = array[2];
string fourth = array[3];
if (WR.Check_Base64(firstElem) && WR.Check_Base64(second) && WR.Check_Base64(third) && WR.Check_Base64(fourth))
{
string input = WR.Base64Decode(firstElem);
string privkey = di + input + ".xml";
if (File.Exists(privkey))
{
Console.WriteLine("Marresi: " + input);
string privateKey = File.ReadAllText(di + input + ".xml");
try
{
string iv_get = WR.Base64Decode(second);
try
{
string rsaKey_get = WR.rsa_Decrypt(third, privateKey);
try
{
Console.WriteLine("Dekriptimi: " + WR.des_Decrypt(fourth, rsaKey_get, iv_get));
}
catch (Exception)
{
Console.WriteLine("Error: {0}");
}
}
catch (CryptographicException)
{
Console.WriteLine("Dekriptimi nuk mund te behet me celesin e dhene");
}
}
catch (Exception)
{
Console.WriteLine("IV nuk eshte e njejte me ate te enkriptimit!");
}
}
else
{
Console.WriteLine("Celesi privat " + input + " nuk ekziston.");
}
}
else
{
Console.WriteLine("Nuk eshte Base64!");
}
}
}
else
{
Console.WriteLine("Provide valid args!");
}
}
//faza2
else if (command == "export-key")
{
try
{
if (args[1].Length != 0 && args[2].Length != 0)
{
string type = args[1];
string name = args[2];
string privKeysDir = di + name + ".xml";
string pubKeysDir = di + name + ".pub.xml";
if (File.Exists(pubKeysDir) && File.Exists(privKeysDir))
{
if (args.Length == 3)
{
if (type == "public")
{
string publicKey = File.ReadAllText(di + name + ".pub.xml");
publicKey = publicKey.Replace(">", ">" + System.Environment.NewLine);
Console.WriteLine("\n" + publicKey + "\n");
}
else if (type == "private")
{
string privateKey = File.ReadAllText(di + name + ".xml");
privateKey = privateKey.Replace(">", ">" + System.Environment.NewLine);
Console.WriteLine("\n" + privateKey + "\n");
}
}
else if (args.Length == 4)
{
string expFile = args[3];
DirectoryInfo expDir = Directory.CreateDirectory("exported/");
string publicKey = File.ReadAllText(di + name + ".pub.xml");
string privateKey = File.ReadAllText(di + name + ".xml");
if (type == "private")
{
File.WriteAllText(expDir + expFile + ".xml", privateKey);
Console.WriteLine("Celesi privat u ruajt ne fajllin " + expFile + ".xml");
}
else if (type == "public")
{
string expFilep = expFile + ".pub";
File.WriteAllText(expDir + expFilep + ".xml", publicKey);
Console.WriteLine("Celesi publik u ruajt ne fajllin " + expFile + ".pub.xml");
}
}
}
else if (File.Exists(pubKeysDir) && !File.Exists(privKeysDir))
{
if (args.Length == 3)
{
if (type == "public")
{
string publicKey = File.ReadAllText(di + name + ".pub.xml");
Console.WriteLine("\n" + publicKey + "\n");
}
else if (type == "private")
{
Console.WriteLine("\nGabim: Celesi privat " + name + " nuk ekziston\n");
}
}
else if (args.Length == 4)
{
string expFile = args[3];
DirectoryInfo expDir = Directory.CreateDirectory("exported/");
// using (StreamWriter strw = File.CreateText(expDir + expFile)) ;
string publicKey = File.ReadAllText(di + name + ".pub.xml");
File.WriteAllText(expDir + expFile, publicKey);
Console.WriteLine("Celesi publik u ruajt ne fajllin " + expFile);
}
}
else
{
Console.WriteLine("Gabim: Celesi " + name + " nuk ekziston.");
}
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: export-key <public|private> <name> dhe [file] opsionale");
}
}
else if (command == "import-key")
{
try
{
if (args[1].Length != 0 && args[2].Length != 0)
{
string name = args[1];
string path = args[2];
string distinguishURL = "http";
if (path.Contains(distinguishURL))
{
string getContent = Import_key.Get(path);
if (getContent.Contains("<P>"))
{
rsa = new RsaEncryptor();
string publicKey = rsa.GetPublicKey();
File.WriteAllText(di + name + ".xml", getContent);
File.WriteAllText(di + name + ".pub.xml", publicKey);
Console.WriteLine("Celesi privat u ruajt ne fajllin " + di + name + ".xml");
Console.WriteLine("Celesi publik u ruajt ne fajllin " + di + name + ".pub.xml");
}
else
{
File.WriteAllText(di + name + ".pub.xml", getContent);
Console.WriteLine("Celesi publik u ruajt ne fajllin " + di + name + ".pub.xml");
}
}
else
{
if (File.Exists(path))
{
string content = File.ReadAllText(path);/*@"C:\Users\Admin\Desktop\edon.xml"*/
if (content.Contains("<P>"))
{
rsa = new RsaEncryptor();
string publicKey = rsa.GetPublicKey();
File.WriteAllText(di + name + ".xml", content);
File.WriteAllText(di + name + ".pub.xml", publicKey);
Console.WriteLine("Celesi privat u ruajt ne fajllin " + di + name + ".xml");
Console.WriteLine("Celesi publik u ruajt ne fajllin " + di + name + ".pub.xml");
}
else
{
File.WriteAllText(di + name + ".pub.xml", content);
Console.WriteLine("Celesi publik u ruajt ne fajllin " + di + name + ".pub.xml");
}
}
else
{
Console.WriteLine("Gabim: Fajlli " + path + " nuk ekziston.");
}
}
}
}
catch
{
Console.WriteLine("Kerkesa duhet te jete: import-key <name> <path>");
}
}
else if (command == "list-keys")//Komande shtese -> listimi i celesave (needs to convert from path name > name:)
{
Dictionary <string, string> list_keys = new Dictionary <string, string>();
string[] fCount = Directory.GetFiles(@"../../../keys/", "*.xml");
foreach (string k in fCount)
{
string val = File.ReadAllText(@k, Encoding.UTF8);
list_keys.Add(k, val);
}
foreach (KeyValuePair <string, string> item in list_keys)
{
Console.WriteLine("Key: {0}, \nValue: {1}\n\n", item.Key, item.Value);
}
}
//FAZA 1
else if (command == "four-square")
{
try
{
if (args[1] == "encrypt")
{
try
{
string plaintext = args[2];
string key1 = args[3];
string key2 = args[4];
Console.WriteLine("Encryption: " + FS.Encrypt(plaintext, key1, key2));
}
catch (Exception)
{
Console.WriteLine("You should put arguments in this order: <plaintext> <key1> <key2>" +
"\nIf plaintext is a sentence, put them in \"\", key must be one word and contain only letters!");
}
}
else if (args[1] == "decrypt")
{
try
{
string ciphertext = args[2];
string key1 = args[3];
string key2 = args[4];
Console.WriteLine("Decryption: " + FS.Decrypt(ciphertext, key1, key2));
}
catch (Exception)
{
Console.WriteLine("You should put arguments in this order: <ciphertext> <key1> <key2>");
}
}
else
{
Console.WriteLine("Your command should be: <encrypt> or <decrypt> ");
}
}
catch (Exception)
{
Console.WriteLine("COMMANDS: <encrypt> <decrypt>");
}
}
else if (command == "case")
{
try
{
if (args[1] == "lower")
{
string word = args[2];
Console.WriteLine(word.ToLower());
}
else if (args[1] == "upper")
{
string word = args[2];
Console.WriteLine(word.ToUpper());
}
else if (args[1] == "capitalize")
{
string word = args[2];
Console.WriteLine(CASE.Capitalize(word));
}
else if (args[1] == "inverse")
{
string word = args[2];
Console.WriteLine(CASE.Inverse(word));
}
else if (args[1] == "alternating")
{
string word = args[2];
Console.WriteLine(CASE.Alternating(word));
}
else if (args[1] == "sentence")
{
string a = args[2];
Console.Write(a.ToLower() + ", " + CASE.Str2(a) + ". " + a.ToUpper() + "! " + CASE.Str4(a) + ".\n" + CASE.Str5(a) + ", " + a.ToLower() + ". " + CASE.Str7(a) + "! " + CASE.Str8(a) + ".");
}
else
{
Console.WriteLine("Your command was wrong, choice one of the cases: <lower> <upper> <capitalize> <inverse> <alternating> <sentence>");
}
}
catch (Exception)
{
Console.WriteLine("CASES: <lower> <upper> <capitalize> <inverse> <alternating> <sentence> ");
}
}
else if (command == "rail-fence")
{
try
{
if (args[1] == "encrypt")
{
string plaint = args[2];
string rail = args[3];
int railsNr = Int32.Parse(rail);
Console.WriteLine(RF.Rencode(plaint, railsNr));
}
else if (args[1] == "decrypt")
{
string ciphert = args[2];
string rail = args[3];
int railsNr = Int32.Parse(rail);
Console.WriteLine(RF.Rdecode(ciphert, railsNr));
}
else
{
Console.WriteLine("You must choose beetwen: <encrypt> <decrypt>");
}
}
catch (Exception)
{
Console.WriteLine("Continue: <plaintext> <rails>");
}
}
else
{
Console.WriteLine("Kerkesa duhet te jete: <create-user> <delete-user> <export-key> <import-key> <write-message> <read-message>");
}
/*else
* {
* Console.WriteLine("You should provide a valid METHOD: <four-square> <case> <rail-fence>");
* }*/
}
}