/// <summary>
/// Delete a specify connection
/// </summary>
/// <param name="tmpConnectionToSet">connection to delete</param>
internal void DeleteConnection(ConnectionModel tmpConnectionToSet)
{
BCEngine engine = new BCEngine(new AesEngine(), Encoding.UTF8);
engine.SetPadding(new Pkcs7Padding());
string encComputerMacAddress = engine.Encrypt(string.Concat(Salt, tmpConnectionToSet.MachineMacAddress, Pepper), Key256Bits);
string encComputerName = engine.Encrypt(string.Concat(Salt, tmpConnectionToSet.MachineName, Pepper), Key256Bits);
string encComputerUserName = engine.Encrypt(string.Concat(Salt, tmpConnectionToSet.MachineUserName, Pepper), Key256Bits);
using (PasswordKeeperEntities context = new PasswordKeeperEntities())
{
// Delete any previous row which match
List <ConnectionTemp> existingConnections = (from conn in context.ConnectionTemps
where conn.ComputerMacAddress.Equals(encComputerMacAddress) &&
conn.ComputerName.Equals(encComputerName) &&
conn.ComputerUserName.Equals(encComputerUserName)
select conn).ToList();
if (existingConnections.Count > 0)
{
context.ConnectionTemps.RemoveRange(existingConnections);
context.SaveChanges();
}
}
}
internal static string AESDecryption(string cipher, string key, string salt, Pkcs7Padding padding)
{
BCEngine bcEngine = new BCEngine(new AesEngine(), Encoding.UTF8);
bcEngine.SetPadding(padding);
return(bcEngine.Decrypt(cipher, key));
}
/// <summary>
/// Get the whole list of passwords for a user
/// </summary>
/// <param name="userId">User id</param>
/// <returns>The list of active passwords</returns>
internal List <PasswordModel> GetList(int userId)
{
List <PasswordModel> passwords = new List <PasswordModel>();
using (PasswordKeeperEntities context = new PasswordKeeperEntities())
{
List <Password> pwds = (from pass in context.Passwords
where pass.IsActive && pass.UserId == userId
select pass).ToList();
BCEngine engine = new BCEngine(new AesEngine(), Encoding.UTF8);
engine.SetPadding(new Pkcs7Padding());
foreach (Password pwd in pwds)
{
passwords.Add(new PasswordModel()
{
Id = pwd.Id,
DisplayName = pwd.DisplayName,
Login = GetDecryptedString(engine, pwd.Login),
Password = GetDecryptedString(engine, pwd.Password1),
Url = GetDecryptedString(engine, pwd.Url),
Notes = GetDecryptedString(engine, pwd.Notes),
CreationDate = pwd.CreationDate,
IsActive = pwd.IsActive,
UserId = pwd.UserId
});
}
}
return(passwords);
}
/// <summary>
/// Update a password
/// </summary>
/// <param name="pwdToUpdate">Password to update</param>
internal void Update(PasswordModel pwdToUpdate)
{
BCEngine engine = new BCEngine(new AesEngine(), Encoding.UTF8);
engine.SetPadding(new Pkcs7Padding());
using (PasswordKeeperEntities context = new PasswordKeeperEntities())
{
Password pass = GetPassword(context, pwdToUpdate.Id);
pass.DisplayName = pwdToUpdate.DisplayName;
pass.Login = engine.Encrypt(string.Concat(Salt, pwdToUpdate.Login, Pepper), Key256Bits);
pass.Password1 = engine.Encrypt(string.Concat(Salt, pwdToUpdate.Password, Pepper), Key256Bits);
pass.Url = engine.Encrypt(string.Concat(Salt, pwdToUpdate.Url, Pepper), Key256Bits);
pass.Notes = engine.Encrypt(string.Concat(Salt, pwdToUpdate.Notes, Pepper), Key256Bits);
context.SaveChanges();
}
}
/// <summary>
/// Get the last user id for the given connection details
/// </summary>
/// <param name="tmpConnection">Connection data</param>
/// <returns>The user id</returns>
internal int?GetConnectionTempUserId(ConnectionModel tmpConnection)
{
BCEngine engine = new BCEngine(new AesEngine(), Encoding.UTF8);
engine.SetPadding(new Pkcs7Padding());
string encComputerMacAddress = engine.Encrypt(string.Concat(Salt, tmpConnection.MachineMacAddress, Pepper), Key256Bits);
string encComputerName = engine.Encrypt(string.Concat(Salt, tmpConnection.MachineName, Pepper), Key256Bits);
string encComputerUserName = engine.Encrypt(string.Concat(Salt, tmpConnection.MachineUserName, Pepper), Key256Bits);
using (PasswordKeeperEntities context = new PasswordKeeperEntities())
{
int usrIdLogin = (from conn in context.ConnectionTemps
where conn.ComputerMacAddress.Equals(encComputerMacAddress) &&
conn.ComputerName.Equals(encComputerName) &&
conn.ComputerUserName.Equals(encComputerUserName)
select conn.IdUser).FirstOrDefault();
return(usrIdLogin == 0 ? new int?() : usrIdLogin);
}
}
/// <summary>
/// Create a new password
/// </summary>
/// <param name="pwdToCreate">Password to create</param>
internal void Create(PasswordModel pwdToCreate)
{
BCEngine engine = new BCEngine(new AesEngine(), Encoding.UTF8);
engine.SetPadding(new Pkcs7Padding());
using (PasswordKeeperEntities context = new PasswordKeeperEntities())
{
Password newPwd = new Password()
{
Login = engine.Encrypt(string.Concat(Salt, pwdToCreate.Login, Pepper), Key256Bits),
Password1 = engine.Encrypt(string.Concat(Salt, pwdToCreate.Password, Pepper), Key256Bits),
DisplayName = pwdToCreate.DisplayName,
Url = engine.Encrypt(string.Concat(Salt, pwdToCreate.Url, Pepper), Key256Bits),
Notes = engine.Encrypt(string.Concat(Salt, pwdToCreate.Notes, Pepper), Key256Bits),
CreationDate = pwdToCreate.CreationDate,
IsActive = pwdToCreate.IsActive,
UserId = pwdToCreate.UserId
};
context.Passwords.Add(newPwd);
context.SaveChanges();
}
}
/// <summary>
/// Decrypt cipher string and remove salt and pepper
/// </summary>
/// <param name="engine">Cipher engine</param>
/// <param name="cipher">Cipher text</param>
/// <returns>Decrypted string</returns>
private string GetDecryptedString(BCEngine engine, string cipher)
{
string saltedString = engine.Decrypt(cipher, Key256Bits);
return(saltedString.Replace(Salt, string.Empty).Replace(Pepper, string.Empty));
}
