/// <summary>
/// Validates whether the payload's credentials are valid.
/// <para>
/// @author: Brian Fann
/// @updated: 4/24/18
/// </para>
/// </summary>
/// <param name="payload">Payload of token</param>
/// <returns>True if credentials are valid, false otherwise</returns>
private ResponseDto <bool> ValidateCredentials(SsoTokenPayloadDto payload)
{
// Validate username and password
var loginDto = new LoginDto(payload.Username, payload.Password);
var accountValidationStrategy = new LoginPreLogicValidationStrategy(loginDto);
var accountResult = accountValidationStrategy.ExecuteStrategy();
if (!accountResult.Data)
{
StoreInvalidToken();
return(new ResponseDto <bool>()
{
Data = false,
Error = accountResult.Error
});
}
using (var gateway = new AuthenticationGateway())
{
var userAccountResult = gateway.GetUserAccount(payload.Username);
if (userAccountResult.Error != null)
{
return(new ResponseDto <bool>()
{
Data = false,
Error = userAccountResult.Error
});
}
var userAccount = userAccountResult.Data;
var saltResult = gateway.GetUserPasswordSalt(userAccount.Id);
// Check if salt exists
if (saltResult.Error != null)
{
return(new ResponseDto <bool>()
{
Data = false,
Error = saltResult.Error
});
}
// Hash the password and compare it against the database
var hashedPassword = new PayloadHasher().Sha256HashWithSalt(saltResult.Data.Salt, payload.Password);
var isPasswordMatching = hashedPassword == userAccount.Password;
if (!isPasswordMatching)
{
return(new ResponseDto <bool>()
{
Data = false,
Error = AuthenticationErrorMessages.USERNAME_PASSWORD_ERROR
});
}
}
// Credentials are valid at this point
return(new ResponseDto <bool>()
{
Data = true
});
}
/// <summary>
/// This Method contains all the logic that is implemented to authenticate the user with the database
/// </summary>
/// <param name="loginDto"></param>
/// <returns>
/// ResponseDto with the updated LoginDto
/// </returns>
public ResponseDto <LoginDto> LoginUser(LoginDto loginDto)
{
var loginPreLogicValidationStrategy = new LoginPreLogicValidationStrategy(loginDto);
// Checking if the Dto has all the information it needs
var validateLoginDtoResult = loginPreLogicValidationStrategy.ExecuteStrategy();
if (!validateLoginDtoResult.Data)
{
return(new ResponseDto <LoginDto>
{
Error = validateLoginDtoResult.Error
});
}
// Pulling attempts from DB
using (var gateway = new AuthenticationGateway())
{
var userAttemptsResult = gateway.GetFailedAttempt(loginDto.Username);
// Checking if the gateway returns a false
if (userAttemptsResult.Error != null)
{
return(Error(userAttemptsResult.Error));
}
// If there is no Error then take the data out
var userAttempts = userAttemptsResult.Data;
// Checking if they already have 5 failed attempts 20 mins ago
if (userAttempts == null)
{
userAttempts = new FailedAttempts()
{
LastAttemptTime = DateTime.UtcNow,
Count = 0
};
}
else if (userAttempts.Count >= 5)
{
var timeToCompare = DateTime.UtcNow.Subtract(TimeSpan.FromMinutes(20));
if (!(userAttempts.LastAttemptTime.CompareTo(timeToCompare) < 0))
{
return(Error(AuthenticationErrorMessages.LOCKED_ACCOUNT));
}
userAttempts.Count = 0;
}
// Pull the User From DB
// Getting the user's ID
var userAccountResult = gateway.GetUserAccount(loginDto.Username);
if (userAccountResult.Error != null)
{
return(Error(userAccountResult.Error));
}
// If there are no Errors from the gateway assign the data to an object
var userAccount = userAccountResult.Data;
// Set UserAttempts Id with the UserAccount Id
userAttempts.Id = userAccount.Id;
// Getting the Salt associated with the ID
var saltResult = gateway.GetUserPasswordSalt(userAccount.Id);
if (saltResult.Error != null)
{
return(Error(userAccountResult.Error));
}
// Check if user is Active
if (userAccount.IsActive == null || userAccount.IsActive == false)
{
return(Error(AuthenticationErrorMessages.INACTIVE_USER));
}
var password = loginDto.Password;
// Hash and Salting the Password
var hashedPassword = new PayloadHasher().Sha256HashWithSalt(saltResult.Data.Salt, password);
// Checking if the Password is equal to what is in the DataBase
var checkPasswordResult = hashedPassword == userAccount.Password;
// If Password matches log the attempt and send loginDto back
if (checkPasswordResult)
{
userAttempts.Count = 0;
return(SuccessfulAttempt(userAttempts, loginDto));
}
// Checking if this is the 5th attempt to time stamp it
if (++userAttempts.Count >= 5)
{
userAttempts.LastAttemptTime = DateTime.UtcNow;
}
return(FailedAttempt(userAttempts, AuthenticationErrorMessages.USERNAME_PASSWORD_ERROR));
}
}
