public void SignatureKeyCheck()
{
DigitalSignatureUtils.RetrieveKeyPair("addr1");
var pubKey = DigitalSignatureUtils.RetrievePublicKey();
Assert.IsTrue(pubKey != null);
}
public void RepositoriesFullInsert()
{
DigitalSignatureUtils.AssignKeyPair("addr3");
TransactionPoolRepository tpr = new TransactionPoolRepository();
TransactionPool tp = new TransactionPool
{
Timestamp = DateTime.Now
};
int poolId = tpr.Add(tp);
Assert.AreEqual(poolId, tpr.Get(poolId).Id);
TransactionRepository tr = new TransactionRepository();
Transaction t = new Transaction
{
PoolId = poolId,
SenderId = 6,
RecipientId = 1,
Amount = 10,
Status = TransactionStatus.confirmed.ToString(),
Timestamp = DateTime.Now
};
int transactionId = tr.Add(t);
Assert.AreEqual(transactionId, tr.Get(transactionId).Id);
BlockRepository br = new BlockRepository();
Block b = new Block
{
PoolId = poolId,
PreviousHash = br.Get().Last().Hash,
Timestamp = DateTime.Now
};
b.AssignPool();
b.ComputeHash();
b.Signature = Convert.ToBase64String(
DigitalSignatureUtils.SignData(
Convert.FromBase64String(
b.Hash
)
)
);
int blockId = br.Add(b);
Assert.AreEqual(blockId, br.Get(blockId).Id);
}
public Block GenerateBlock(int senderId, int recipientId, float amount)
{
TransactionPoolRepository tpr = new TransactionPoolRepository();
TransactionPool tp = new TransactionPool
{
Timestamp = DateTime.Now
};
int poolId = tpr.Add(tp);
TransactionRepository tr = new TransactionRepository();
Transaction t = new Transaction
{
PoolId = poolId,
SenderId = senderId,
RecipientId = recipientId,
Amount = amount,
Status = TransactionStatus.confirmed.ToString(),
Timestamp = DateTime.Now
};
int transactionId = tr.Add(t);
Block b = new Block
{
PoolId = poolId,
PreviousHash = Blocks.Last().Hash,
Timestamp = DateTime.Now
};
b.AssignPool();
b.ComputeHash();
b.Signature = Convert.ToBase64String(
DigitalSignatureUtils.SignData(
Convert.FromBase64String(
b.Hash
)
)
);
return(b);
}
public void SignatureValidationBetweenTwoUsers()
{
//User1
DigitalSignatureUtils.AssignKeyPair("addr1");
//User1 public key
var pubKey = DigitalSignatureUtils.RetrievePublicKey();
//Hashed data
var hash = HashUtils.ComputeHashSha256(Encoding.UTF8.GetBytes("TestData"));
//User1 signatured data
var signature = DigitalSignatureUtils.SignData(hash);
//User2
DigitalSignatureUtils.AssignKeyPair("addr2");
//Data validation
var isValid = DigitalSignatureUtils.VerifySignature(hash, signature, pubKey);
Assert.IsTrue(isValid);
}
private void OnLogin(object obj)
{
if (string.IsNullOrWhiteSpace(Username))
{
Error = "Enter a username.";
ErrorVisibility = Visibility.Visible;
return;
}
User user = userRepo.Get(Username);
if (user != null)
{
PasswordBox passwordBox = obj as PasswordBox;
string password = passwordBox.Password;
var passwordHash = HashUtils.ComputeHashSha256(
Encoding.UTF8.GetBytes(
password +
user.Salt
)
);
password = string.Empty;
if (Convert.ToBase64String(passwordHash).Equals(user.Password))
{
bool validOwner = DigitalSignatureUtils.RetrieveKeyPair(user.Address);
if (validOwner)
{
Application.Current.Resources["SID"] = user.Id;
ViewModelLocator.Main.CurrentViewModel = ViewModelLocator.Dashboard;
Messenger.Default.Send(user);
dialogCoordinator.ShowMessageAsync(
this,
"Login Successful",
"You are now signed into your profile."
);
}
else
{
dialogCoordinator.ShowMessageAsync(
this,
"Security Breach - 3",
"A valid key pair associated to this account wasn't found on your machine."
);
}
}
else
{
dialogCoordinator.ShowMessageAsync(
this,
"Login Failed",
"The credentials you provided are invalid. Please double check and retry."
);
}
}
else
{
dialogCoordinator.ShowMessageAsync(
this,
"Login Failed",
"The credentials you provided are invalid. Please double check and retry."
);
}
}
private void OnRegister(object obj)
{
if (string.IsNullOrWhiteSpace(Firstname))
{
Error = "Enter a firstname.";
ErrorVisibility = Visibility.Visible;
return;
}
if (string.IsNullOrWhiteSpace(Lastname))
{
Error = "Enter a lastname.";
ErrorVisibility = Visibility.Visible;
return;
}
if (string.IsNullOrWhiteSpace(Username))
{
Error = "Enter a username.";
ErrorVisibility = Visibility.Visible;
return;
}
PasswordBox passwordBox = obj as PasswordBox;
string password = passwordBox.Password;
var salt = HashUtils.GetSalt();
var passwordHash = HashUtils.ComputeHashSha256(
Encoding.UTF8.GetBytes(
password +
Convert.ToBase64String(salt)
)
);
password = string.Empty;
Guid gAddress = Guid.NewGuid();
User user = new User
{
Firstname = Firstname,
Lastname = Lastname,
Username = Username,
Password = Convert.ToBase64String(passwordHash),
Salt = Convert.ToBase64String(salt),
Address = gAddress.ToString("N"),
Timestamp = DateTime.Now
};
userRepo.Add(user);
DigitalSignatureUtils.AssignKeyPair(user.Address);
dialogCoordinator.ShowMessageAsync(
this,
"Register Successful",
"Your private key has been generated and you should keep it for yourself at ALL times."
);
Firstname = string.Empty;
Lastname = string.Empty;
Username = string.Empty;
ViewModelLocator.Main.CurrentViewModel = ViewModelLocator.Login;
}
