public void TestFullrun()
{
const string messageToEncrypt = "Important important!";
byte[] dataToEncrypt = Encoding.UTF8.GetBytes(messageToEncrypt);
var hybridEncryper = new HybridRsaAes();
hybridEncryper.AssignNewRSAKeys();
RSAParameters publicKey = hybridEncryper.GetPublicRSAKey(); //public key receiver
RSAParameters privateKey = hybridEncryper.GetPrivateRSAKey(); //private key receiver
//Encrypt
byte[] sessionKey = AbstractSecureCompareBase.GenerateRandomNumber(32); //256-bit
byte[] iv = AbstractSecureCompareBase.GenerateRandomNumber(16); //128-bit
byte[] encryptedData = hybridEncryper.EncryptAES(dataToEncrypt, sessionKey, iv);
byte[] hmac = hybridEncryper.ComputeHmac(sessionKey, encryptedData);
byte[] encryptedSessionKey = hybridEncryper.EncryptRSA(sessionKey, publicKey);
//sending encrpyted file....(encryptedData, iv, hmac, encryptedSessionKey)
//Decrypt
byte[] decryptedSessionKey = hybridEncryper.DecryptRSA(encryptedSessionKey, privateKey);
Assert.IsTrue(hybridEncryper.VerifyHmac(decryptedSessionKey, encryptedData, hmac));
byte[] decryptedData = hybridEncryper.DecryptAES(encryptedData, decryptedSessionKey, iv);
Assert.IsTrue(Encoding.UTF8.GetString(decryptedData) == messageToEncrypt);
}
public void TestHashPassword()
{
const string password = "******";
const string rightPassword = "******";
const string wrongPassword = "******";
byte[] salt = PBKDF2Impl.GenerateSalt();
byte[] encrypedPassword = PBKDF2Impl.HashPassword(Encoding.UTF8.GetBytes(password), salt);
byte[] encrypedRightPassword = PBKDF2Impl.HashPassword(Encoding.UTF8.GetBytes(rightPassword), salt);
byte[] encrypedWrongPassword = PBKDF2Impl.HashPassword(Encoding.UTF8.GetBytes(wrongPassword), salt);
Assert.IsTrue(AbstractSecureCompareBase.Compare(encrypedPassword, encrypedRightPassword));
Assert.IsFalse(AbstractSecureCompareBase.Compare(encrypedPassword, encrypedWrongPassword));
}
public void EncryptFile(string sourceFilename, string destinationFilename, RSAParameters publicKey)
{
_logger.Info("get data from file");
byte[] dataToEncrypt = GetDataFromFile(sourceFilename);
if (dataToEncrypt != null)
{
_logger.Info("generate session key");
byte[] sessionKey = AbstractSecureCompareBase.GenerateRandomNumber(32); //256-bit
_logger.Info("generate IV");
byte[] iv = AbstractSecureCompareBase.GenerateRandomNumber(16); //128-bit
_logger.Info("encrypt data");
byte[] encryptedData = _hybridEncrypter.EncryptAES(dataToEncrypt, sessionKey, iv);
_logger.Info("generate HMAC");
byte[] hmac = _hybridEncrypter.ComputeHmac(sessionKey, encryptedData);
_logger.Info("encrypt session key");
byte[] encryptedSessionKey = _hybridEncrypter.EncryptRSA(sessionKey, publicKey);
_logger.Info("encrypt file extension");
string fileExtension = Path.GetExtension(sourceFilename);
if (fileExtension != null)
{
byte[] encryptedFileExtension = _hybridEncrypter.EncryptAES(Encoding.UTF8.GetBytes(fileExtension),
sessionKey, iv);
_logger.Info("write data to file");
WriteDataToFile(encryptedData, hmac, encryptedSessionKey, iv, encryptedFileExtension,
destinationFilename + ".sfs");
}
else
{
_logger.Error("file extenstion is null!");
}
}
else
{
_logger.Error("data from file are null!");
}
}
public void TestFullrunWithKeyShare()
{
const string messageToEncrypt = "Important important!";
byte[] dataToEncrypt = Encoding.UTF8.GetBytes(messageToEncrypt);
var hybridEncryper = new HybridRsaAes();
hybridEncryper.AssignNewRSAKeys();
string keyString = hybridEncryper.GetPublicRSAKeyAsXml();
//sending public key string to friend....
var rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(keyString);
Assert.IsTrue(hybridEncryper.GetPublicRSAKeyAsXml() == rsa.ToXmlString(false));
//Encrypt
RSAParameters publicKey = rsa.ExportParameters(false); //public key receiver
byte[] sessionKey = AbstractSecureCompareBase.GenerateRandomNumber(32); //256-bit
byte[] iv = AbstractSecureCompareBase.GenerateRandomNumber(16); //128-bit
byte[] encryptedData = hybridEncryper.EncryptAES(dataToEncrypt, sessionKey, iv);
byte[] hmac = hybridEncryper.ComputeHmac(sessionKey, encryptedData);
byte[] encryptedSessionKey = hybridEncryper.EncryptRSA(sessionKey, publicKey);
//sending encrpyted file....(encryptedData, iv, hmac, encryptedSessionKey)
//Decrypt
RSAParameters privateKey = hybridEncryper.GetPrivateRSAKey(); //private key receiver
byte[] decryptedSessionKey = hybridEncryper.DecryptRSA(encryptedSessionKey, privateKey);
Assert.IsTrue(hybridEncryper.VerifyHmac(decryptedSessionKey, encryptedData, hmac));
byte[] decryptedData = hybridEncryper.DecryptAES(encryptedData, decryptedSessionKey, iv);
Assert.IsTrue(Encoding.UTF8.GetString(decryptedData) == messageToEncrypt);
}
public bool Compare(byte[] array1, byte[] array2)
{
_logger.Info("compare byte arrays");
return(AbstractSecureCompareBase.Compare(array1, array2));
}
