private void SaveHandler(NhanVien item)
{
if (String.IsNullOrWhiteSpace(item.Luong) || String.IsNullOrWhiteSpace(item.MatKhau))
{
MessageBox.Show("Vui lòng nhập đầy đủ thông tin cho nhân viên " + item.MaNV);
return;
}
var existItem = DbLib.GetOne <NhanVien>("SP_GETBYMANV_PUBLIC_ENCRYPT_NHANVIEN", new List <SqlParameter> {
new SqlParameter {
ParameterName = "MaNV", Value = item.MaNV
}
});
if (existItem != null)
{
//ko duoc cap nhat
}
//Insert
else
{
item.PubKey = item.MaNV;
var keyPairs = rsaCryptoService.GenerateKeys();
KeyRepository.StoreKeyPairs(item.PubKey, keyPairs, item.MatKhau);
item.MatKhau = item.MatKhau.GetSHA1Hash();
item.Luong = rsaCryptoService.Encrypt(keyPairs.publicKey, item.Luong);
DbLib.ExecuteNonQuery("SP_INS_PUBLIC_ENCRYPT_NHANVIEN", item.ToSqlParameter());
}
}
public string GenerateKeys()
{
RSACryptography RSA = new RSACryptography();
string publicKey, privateKey;
// Generate RSA key pair
RSA.GenerateKeys(out publicKey, out privateKey);
string plainText = "93f99709-ce56-42a9-af7e-1d72c011c2dd";// Guid.NewGuid().ToString();
// Encrypt
string encryptedText = RSA.Encrypt(publicKey, plainText);
// Decrypt
string decryptedText = RSA.Decrypt(privateKey, encryptedText);
return(plainText + publicKey + privateKey + encryptedText + decryptedText);
// return "<b>Token:</b> " + Server.HtmlEncode(plainText) + "<br />" + "<b>Public key:</b> " + Server.HtmlEncode(publicKey) + "<br />" + "<b>Private key:</b> " + Server.HtmlEncode(privateKey) + "<br />" + "<b>Encrypted text:</b> " + Server.HtmlEncode(encryptedText) + "<br />" + "<b>Decrypted text:</b> " + Server.HtmlEncode(decryptedText);
}
private async Task HandshakeAsync()
{
var encryptedServerKey = rsaCryptography.Encrypt(clientSettings.PublicRsaKey, desCryptography.Key);
var signature = rsaCryptography.Sign(clientSettings.PrivateRsaKey, encryptedServerKey);
var rawEncryptedServerKeyLength = BitConverter.GetBytes(encryptedServerKey.Length);
Array.Reverse(rawEncryptedServerKeyLength);
var requestDataLength = encryptedServerKey.Length + signature.Length + rawEncryptedServerKeyLength.Length;
var requestData = new Byte[requestDataLength];
Array.Copy(rawEncryptedServerKeyLength, 0, requestData, 0, 4);
Array.Copy(encryptedServerKey, 0, requestData, 4, encryptedServerKey.Length);
Array.Copy(signature, 0, requestData, 4 + encryptedServerKey.Length, signature.Length);
var rawResponse = await SendRequestAsync(requestData, ConnectionMode.Assymmetric);
var response = Convert.ToBase64String(rawResponse);
}
private void SaveBangDiemHandler(BangDiem item)
{
item.MaSV = (sinhVienBindingSource.Current as SinhVien).MaSV;
var existItem = DbLib.GetOne <BangDiem>(String.Format("select MaSV, MaHP from BangDiem where MaSV = '{0}' AND MaHP = '{1}' ", item.MaSV, item.MaHP));
if (existItem != null)
{
//Cập nhật điểm của sinh viên
//DbLib.ExecuteNonQuery("SP_BANGDIEM_Update", sqlParams);
}
else
{
//Lưu điểm mới của sinh viên
//Lấy public key của nhân viên đang đăng nhập
var publicKey = KeyRepository.GetPublicKey(curNhanVien.PubKey);
//Thực hiện mã hóa điểm
item.DiemThi = rsaCryptoService.Encrypt(publicKey, item.DiemThi);
var sqlParams = item.ToSqlParameter();
DbLib.ExecuteNonQuery("SP_INS_ENCRYPT_BANGDIEM", sqlParams);
}
}
public static void TestCommutative()
{
var rsa = new RSACryptography();
var privateKey = rsa.KeyCreator.CreatePrivateKey();
var publicKey = rsa.KeyCreator.CreatePublicKey(privateKey);
var blindKey = rsa.KeyCreator.CreateBlindKey();
var msg = Encoding.UTF7.GetBytes("sdlfjsf;slkfslkfddfshkfksjfhsjhfsjldfslkjfslakddsfklsjdflsdkfjsjgakdglkjjkdfhgdkjfghlskdhgklshdglsjdfhgjshfjsdhfkshfsdgfjshgfasldhalskdjalskfsdhjkfsdhfgsfkjaghsjlkfhasdohdfgskljafskhfgkflsdjfkljnzjzzmnznzzzzzzzzzzzzzz");
Console.WriteLine(Encoding.UTF7.GetString(msg));
var encrypted = rsa.Encrypt(publicKey, msg);
var decrypted = rsa.Decrypt(privateKey, encrypted);
Console.WriteLine(Encoding.UTF7.GetString(decrypted));
var B = Encoding.UTF8.GetBytes("B");
var blindB = rsa.BlindData(blindKey, publicKey, B);
var signB = rsa.SignData(privateKey, B);
var signBlindB = rsa.SignData(privateKey, blindB);
var blindSignB = rsa.BlindData(blindKey, publicKey, signB);
Console.WriteLine($"Commutative = {signBlindB.SequenceEqual(blindSignB)}");
Console.WriteLine($"Verify test = {rsa.VerifyData(publicKey, B, signB)}");
}
public string GenerateKeys(string key1, string key2, string dtcreate)
{
RSACryptography RSA = new RSACryptography();
string publicKey, privateKey, dtcreates;
// Generate RSA key pair
RSA.GenerateKey(out publicKey, out privateKey, out dtcreates);
string plainText = "93f99709-ce56-42a9-af7e-1d72c011c2dd";// Guid.NewGuid().ToString();
// Encrypt
string encryptedText = RSA.Encrypt(publicKey, plainText);
// Decrypt
string decryptedText = RSA.Decrypt(privateKey, encryptedText);
string giaima = RSA.Decrypt(privateKey, encryptedText);
File.WriteAllText(Application.StartupPath + "\\PrivateKey.xml", privateKey);
File.WriteAllText(Application.StartupPath + "\\PublicKey.xml", publicKey);
File.WriteAllText(Application.StartupPath + "\\DateKey.xml", dtcreates);
MessageBox.Show("The Key pair created successfully at:\n" + Application.StartupPath);
return(plainText + publicKey + privateKey + encryptedText + decryptedText);
// return "<b>Token:</b> " + Server.HtmlEncode(plainText) + "<br />" + "<b>Public key:</b> " + Server.HtmlEncode(publicKey) + "<br />" + "<b>Private key:</b> " + Server.HtmlEncode(privateKey) + "<br />" + "<b>Encrypted text:</b> " + Server.HtmlEncode(encryptedText) + "<br />" + "<b>Decrypted text:</b> " + Server.HtmlEncode(decryptedText);
}
