public Aes GenerateAes()
{
if (aes == null)
{
aes = Aes.Create();
aes.KeySize = 256;
aes.Key = EncryptionCore.ComputeSha256Hash(usernameHash + passwordHash);
aes.GenerateIV();
byte[] key = new byte[aes.Key.Length + aes.IV.Length + 2];
key[0] = Convert.ToByte(aes.Key.Length);
key[1] = Convert.ToByte(aes.IV.Length);
int i;
for (i = 2; i < aes.Key.Length + 2; i++)
key[i] = aes.Key[i - 2];
for (; i < key.Length; i++)
key[i] = aes.IV[i - (aes.Key.Length + 2)];
File.WriteAllBytes(GetAvailableFileName(), key);
return aes;
}
return aes;
}
public bool AuthenticateLoginDetails(string username, string password)
{
if (!Directory.Exists("users")) Directory.CreateDirectory("users");
string usernameHash = Encoding.UTF8.GetString(EncryptionCore.ComputeSha256Hash(username));
string passwordHash = Encoding.UTF8.GetString(EncryptionCore.ComputeSha256Hash(password));
byte[] key = EncryptionCore.ComputeSha256Hash(usernameHash + passwordHash);
if(key.SequenceEqual(aes.Key))
{
this.username = username;
this.usernameHash = Encoding.UTF8.GetString(EncryptionCore.ComputeSha256Hash(username));
this.passwordHash = Encoding.UTF8.GetString(EncryptionCore.ComputeSha256Hash(password));
return true;
}
return false;
}
public void SetPassword(string password)
{
passwordHash = Encoding.UTF8.GetString(EncryptionCore.ComputeSha256Hash(password));
}
public void SetUsername(string username)
{
this.username = username;
usernameHash = Encoding.UTF8.GetString(EncryptionCore.ComputeSha256Hash(username));
}
