public void Pbkdf2PasswordHasherFailsToRoundTripWhenSaltsDontMatch()
{
var hashsize = 32;
var saltsize = hashsize * 2;
var generator = new CsprngSaltGenerator();
var salt1 = generator.Generate(saltsize);
salt1.Length.ShouldEqual(saltsize);
byte[] salt2;
do
{
salt2 = generator.Generate(saltsize);
} while (salt2.SequenceEqual(salt1));
var hasher = new Pbkdf2PasswordHasher(hashsize);
var hashed = hasher.Hash(salt1, Password);
hashed.Length.ShouldEqual(hashsize);
hasher.Compare(salt2, Password, hashed).ShouldBeFalse();
}
private static async Task Main(string[] args)
{
var cs = "Data Source=localhost\\SQLExpress; Integrated Security=SSPI; Initial Catalog=PLAYGROUND;";
var usersRepository = new SQLServerUsersRepository(cs);
var hasher = new Pbkdf2PasswordHasher();
var users = new Users(usersRepository, hasher);
try
{
await users.CreateUser(
username : "******",
plainTextPassword : "******",
firstName : "admin's name",
lastName : "admin's surname",
userType : UserTypes.Administrator);
await users.CreateUser(
username : "******",
plainTextPassword : "******",
firstName : "user's name",
lastName : "user's surname",
userType : UserTypes.SimpleUser);
var loggedUser = users.Login("user", "wrongPassword");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("done");
Console.Read();
}
public void TestPasswordHashers()
{
Startup.BooksApp.LogTestStart();
//run it only for MS SQL, to avoid slowing down console run for all servers
if (Startup.ServerType != DbServerType.MsSql)
{
return;
}
IPasswordHasher hasher;
var salt = Guid.NewGuid().ToByteArray();
var pwd = "MyPassword_*&^";
long start, timeMs;
bool match;
string hash;
// You can use this test to approximate the 'difficulty' of hashing algorithm for your computer.
// It prints the time it took to hash the pasword. This time should not be too low, desirably no less than 100 ms.
hasher = new BCryptPasswordHasher(workFactor: 10); //each +1 doubles the effort; on my machine: 10 -> 125ms, 11->242ms
start = Util.GetPreciseMilliseconds();
hash = hasher.HashPassword(pwd, salt);
timeMs = Util.GetPreciseMilliseconds() - start;
match = hasher.VerifyPassword(pwd, salt, hasher.WorkFactor, hash);
Assert.IsTrue(match, "BCrypt hasher failed.");
Debug.WriteLine("BCrypt hasher time, ms: " + timeMs);
hasher = new Pbkdf2PasswordHasher(iterationCount: 2000); // on my machine: 2000-> 13ms, 5000->32ms
start = Util.GetPreciseMilliseconds();
hash = hasher.HashPassword(pwd, salt);
timeMs = Util.GetPreciseMilliseconds() - start;
match = hasher.VerifyPassword(pwd, salt, hasher.WorkFactor, hash);
Assert.IsTrue(match, "Pbkdf hasher failed.");
Debug.WriteLine("Pbkdf hasher time, ms: " + timeMs);
}
public void CheckHashTest()
{
Pbkdf2PasswordHasher hasher = new Pbkdf2PasswordHasher();
var result = hasher.VerifyHashedPassword("vGawPyJwb3h4gpYiyxptJdUS31lLLiVhJk2yzlsskx0=:doTdEmoK8ACsuIrLrp4riGYCqi6DEn4CyitpOqoVrFA=", "abcd123");
Assert.AreEqual(PasswordVerificationResult.Success, result);
}
public void HashTest()
{
Pbkdf2PasswordHasher hasher = new Pbkdf2PasswordHasher();
string hash = hasher.HashPassword("abcd123");
Assert.AreEqual(89, hash.Length);
}
public void Pbkdf2()
{
var hasher = new Pbkdf2PasswordHasher();
var hashedPassword = hasher.HashPassword(TestPassword, new SecureRandomGenerator());
Assert.IsNotNull(hashedPassword);
var flag = hasher.VerifyHashedPassword(hashedPassword, TestPassword);
Assert.IsTrue(flag);
}
public async Task <UserDto> LogIn(CredentialsViewModel viewModel)
{
var user = _unitOfWork.Users.All(nameof(User.Entitlements), nameof(User.Memberships), nameof(User.Preferences))
.SingleOrDefault(u => u.Email == viewModel.Email) ?? throw new Exception(Constants.InvalidCredentialsExceptionMessage);
var hasher = new Pbkdf2PasswordHasher();
if (hasher.VerifyHashedPassword(user, user.Password, viewModel.Password) == PasswordVerificationResult.Failed)
{
throw new Exception(Constants.InvalidCredentialsExceptionMessage);
}
return(await _userToUserDtoConverter.Convert(user));
}
public void Pbkdf2PasswordHasherFailsToRoundTripWhenPasswordsDontMatch()
{
var hashsize = 32;
var saltsize = hashsize * 2;
var salt = new CsprngSaltGenerator().Generate(saltsize);
salt.Length.ShouldEqual(saltsize);
var hasher = new Pbkdf2PasswordHasher(hashsize);
var hashed = hasher.Hash(salt, Password);
hashed.Length.ShouldEqual(hashsize);
hasher.Compare(salt, "Goodbye, World!", hashed).ShouldBeFalse();
}
public void Pbkdf2PasswordHasherCanRoundTrip()
{
var hashsize = 32;
var saltsize = hashsize * 2;
var salt = new CsprngSaltGenerator().Generate(saltsize);
salt.Length.ShouldEqual(saltsize);
var hasher = new Pbkdf2PasswordHasher(hashsize);
var hashed = hasher.Hash(salt, Password);
hashed.Length.ShouldEqual(hashsize);
hasher.Compare(salt, Password, hashed).ShouldBeTrue();
}
static async Task Main(string[] args)
{
IConfigurationRoot config = new ConfigurationBuilder()
.AddEnvironmentVariables()
.AddCommandLine(args)
.Build();
step = 50;
count = config.GetValue("Count", 1000);
threadsCount = config.GetValue("ThreadsCount", 10);
onlyIfDbEmpty = config.GetValue("OnlyIfDbIsEmpty", true);
connectionString = config["ConnectionString"];
logger = CreateLogger();
hasher = new Pbkdf2PasswordHasher(new Pdkdf2PasswordHasherOptions());
if (!await IsGenerationNeeded())
{
return;
}
var tasks = new List <Task>();
for (int i = 0; i < threadsCount; i++)
{
tasks.Add(Task.Factory.StartNew(GenerateImpl));
}
Task.WaitAll(tasks.ToArray());
logger.LogInformation($"Total generated users: {generated}");
/*var admin = new User
* {
* Age = 20,
* City = "Муха",
* Email = "*****@*****.**",
* GivenName = "Админ",
* FamilyName = "Административный",
* IsActive = true,
* Password = hasher.HashPassword("123"),
* Interests = "администрирование"
* };
* await repo.AddUser(admin);*/
}
public async Task ResetPassword(CredentialsViewModel viewModel)
{
var user = _unitOfWork.Users.All().FirstOrDefault(u => u.Email == viewModel.Email);
if (user == null)
{
throw new Exception(Constants.InvalidEmailExceptionMessage);
}
user.IsEnabled = true;
var hasher = new Pbkdf2PasswordHasher();
user.Password = hasher.HashPassword(user, viewModel.Password);
_unitOfWork.Users.Update(user);
await _unitOfWork.SaveChangesAsync();
}
public async Task Register(UserViewModel viewModel)
{
var user = await _userViewModelToUserConverter.Convert(viewModel);
if (_unitOfWork.Users.All().Any(u => u.Email == user.Email))
{
throw new Exception(Constants.EmailAlreadyUsedExceptionMessage);
}
var hasher = new Pbkdf2PasswordHasher();
user.Salt = hasher.GenerateSalt();
user.Password = hasher.HashPassword(user, hasher.GeneratePassword());
user.IsEnabled = false;
_unitOfWork.Users.Add(user);
await _unitOfWork.SaveChangesAsync();
var content = System.IO.File.ReadAllText(System.IO.Path.Combine(_environment.ContentRootPath, Constants.WwwRoot, Constants.EmailTemplateFoldername, Constants.RegistrationEmailFilename))
.Replace("@NAME@", user.Name);
await _emailService.Send(user.Email, Constants.RegistrationEmailSubject, content);
}
