// TODO: Separate repository
public static void Store(string service, PasswordRequirements req)
{
lock (locker)
{
InsertOrUpdate(service, req);
}
}
/// <summary>
/// Verifies password matches requirement, add characters if needed
/// </summary>
private string VerifyPassword(string sourcePassword, PasswordRequirements requirements)
{
bool success = true;
var password = sourcePassword;
if ((requirements & PasswordRequirements.NumberRequired) > 0)
{
success &= (sourcePassword.Any(x => Numbers.Contains(x)));
if (!success)
{
password += Numbers[GetAscii(sourcePassword[0]) % Numbers.Length];
}
}
if ((requirements & PasswordRequirements.SymbolRequired) > 0)
{
success &= (sourcePassword.Any(x => Symbols.Contains(x)));
password += Symbols[GetAscii(sourcePassword[0]) % Symbols.Length];
}
if ((requirements & PasswordRequirements.UpperCaseRequired) > 0)
{
success &= (sourcePassword.Any(x => Uppercase.Contains(x)));
password += Uppercase[GetAscii(sourcePassword[0]) % Uppercase.Length];
}
return(password);
}
public void TestInvalidPasswordParameters_Multiple()
{
//Arrange
PasswordGenerator generator = new PasswordGenerator();
var requirements = new PasswordRequirements()
{
MaxLength = 16,
MinLength = 8,
MinLowerAlphaChars = 5,
MinNumericChars = 4,
MinSpecialChars = 4,
MinUpperAlphaChars = 4
};
var expectedExcetpion = new Exception("Combination of MinLowerAlphaChars, MinNumericChars, MinSpecialChars and MinUpperAlphaChars cannot be greater than MaxLength.");
Exception resultExcetpion = null;
//Act
try
{
string result = generator.GeneratePassword(requirements);
}
catch (Exception ex)
{
resultExcetpion = ex;
}
//Assert
Assert.AreEqual(expectedExcetpion.Message, resultExcetpion.Message);
}
public void TestInvalidMinLength()
{
//Arrange
PasswordGenerator generator = new PasswordGenerator();
var requirements = new PasswordRequirements()
{
MaxLength = 8,
MinLength = 16,
};
var expectedExcetpion = new Exception("MinLength cannot be greater than MaxLength.");
Exception resultExcetpion = null;
//Act
try
{
string result = generator.GeneratePassword(requirements);
}
catch (Exception ex)
{
resultExcetpion = ex;
}
//Assert
Assert.AreEqual(expectedExcetpion.Message, resultExcetpion.Message);
}
public string GeneratePassword(PasswordRequirements requirements)
{
string[] randomCharacters = new[]
{
"ABCDEFGHIJKLMNOPQRSTUVWXYZ", // uppercase
"abcdefghijkmnopqrstuvwxyz", // lowercase
"0123456789", // digits
"!@#$£%^&*()<>{}-=" // non-alphanumeric
};
Random rand = new Random(Environment.TickCount);
List <char> chars = new List <char>();
try
{
if (requirements.MaxLength == 0)
{
requirements.MaxLength = 8;
}
if (requirements.MinLength == 0)
{
requirements.MinLength = 5;
}
if (requirements.MinUpperAlphaChars > 0)
{
PwRequirements(requirements.MinUpperAlphaChars, chars, rand, randomCharacters, 0);
}
if (requirements.MinLowerAlphaChars > 0)
{
PwRequirements(requirements.MinLowerAlphaChars, chars, rand, randomCharacters, 1);
}
if (requirements.MinNumericChars > 0)
{
PwRequirements(requirements.MinNumericChars, chars, rand, randomCharacters, 2);
}
if (requirements.MinSpecialChars > 0)
{
PwRequirements(requirements.MinSpecialChars, chars, rand, randomCharacters, 3);
}
for (int i = chars.Count; i < requirements.MaxLength; i++)
{
string generatedChars = randomCharacters[rand.Next(0, randomCharacters.Length)];
chars.Insert(rand.Next(0, chars.Count),
generatedChars[rand.Next(0, generatedChars.Length)]);
}
return(new string(chars.ToArray()));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
public void WithValidConstructorParameters_ThenThePropertiesMapVerbatim()
{
PasswordRequirements subject = new PasswordRequirements(42, 41, true, true, true, true);
Assert.AreEqual(42, subject.MaximumLength);
Assert.AreEqual(41, subject.MinimumLength);
Assert.IsTrue(subject.Lowercase);
Assert.IsTrue(subject.Uppercase);
Assert.IsTrue(subject.Number);
Assert.IsTrue(subject.Special);
}
public MainPage()
{
InitializeComponent();
ViewModel = new PasswordRequestViewModel();
BindingContext = ViewModel;
DefaultRequirements =
PasswordRequirements.SymbolRequired
| PasswordRequirements.UpperCaseRequired
| PasswordRequirements.NumberRequired;
}
public void ThenThePropertiesMapVerbatim()
{
PasswordRequirements subject = PasswordRequirements.Default;
Assert.AreEqual(33, subject.MaximumLength);
Assert.AreEqual(8, subject.MinimumLength);
Assert.IsTrue(subject.Lowercase);
Assert.IsTrue(subject.Uppercase);
Assert.IsTrue(subject.Number);
Assert.IsTrue(subject.Special);
}
public string GeneratePassword(PasswordRequirements requirements)
{
var password = GenerateUppercase(requirements.MinUpperAlphaChars);
password = string.Concat(password, GenerateLowercase(requirements.MinLowerAlphaChars));
password = string.Concat(password, GenerateNumeric(requirements.MinNumericChars));
password = string.Concat(password, GenerateSpecial(requirements.MinSpecialChars));
password = string.Concat(password, GeneratePadding(requirements.MinLength, requirements.MaxLength, password.Length));
//randomize the password
return(new string(password.ToCharArray().OrderBy(c => (Random.Next())).ToArray()));
}
private void GeneratePassword(string password, string serviceName, PasswordRequirements requirement)
{
PasswordGenerator generator = new PasswordGenerator(requirement);
ViewModel.Password = generator.GeneratePassword(password, serviceName, 10);
// store settings
ServicePersistor.Persist(serviceName, requirement);
ViewModel.PasswordVisible = true;
ViewModel.CreateNewPassword = true;
IoCProviders.GetProvider <ICopyToClipboard>().CopyToClipboard(ViewModel.Password);
IoCProviders.GetProvider <IProvideNotifications>().Notify(null, "Password has been copied to clipboard");
}
static void Main(string[] args)
{
int numberOfGenerations = 50;
var generator = new PasswordGenerator();
var requirements = new PasswordRequirements(
minLength: 8,
maxLength: 16,
minLowerAlpha: 2,
minUpperAlpha: 2,
minNumeric: 2,
minSpecial: 2);
for (int i = 0; i < numberOfGenerations; i++)
{
Console.WriteLine(generator.GeneratePassword(requirements));
}
}
private static void InsertOrUpdate(string service, PasswordRequirements req)
{
var requirementInt = Convert.ToInt32(req);
var existingEntity = conn.Table <ServicesEntity>().FirstOrDefault(e => e.Service == service);
if (existingEntity == null)
{
var newEntity = new ServicesEntity()
{
Service = service,
Requirements = requirementInt
};
conn.Insert(newEntity);
}
else
{
existingEntity.Requirements = requirementInt;
conn.Update(existingEntity);
}
}
public void TestNullPasswordRequirements()
{
//Arrange
PasswordGenerator generator = new PasswordGenerator();
PasswordRequirements requirements = null;
var expectedExcetpion = new Exception("Password requirements are null.");
Exception resultExcetpion = null;
//Act
try
{
string result = generator.GeneratePassword(requirements);
}
catch (Exception ex)
{
resultExcetpion = ex;
}
//Assert
Assert.AreEqual(expectedExcetpion.Message, resultExcetpion.Message);
}
/// <summary>
/// Store password requirement for a given service
/// </summary>
public static void Persist(string service, PasswordRequirements req)
{
SqliteStorage.Store(GetServiceName(service), req);
}
public PasswordGenerator(PasswordRequirements req)
{
Requirements = req;
}
