Encryption

enc.go

// DefaultCost is the cost that will actually be set if a
// cost below MinCost is passed into
// GenerateFromPassword.
var DefaultCost = bcrypt.DefaultCost

// HashPassword gets the password in byte format and
// generates a hashed password with the default cost
// of 10.
// Returns errors.INTERNAL if the bcrypt failed to generate from password.
func HashPassword(password string) (string, error) {
	const op = "Encryption.HashPassword"
	bytePassword := []byte(password)
	hashedPassword, err := bcrypt.GenerateFromPassword(bytePassword, DefaultCost)
	if err != nil {
		return "", &errors.Error{Code: errors.INTERNAL, Message: "Error hashing password", Operation: op, Err: err}
	}
	return string(hashedPassword), err
}

// Login
//
// Authenticate compares the email & password for a match in the DB.
// Returns errors.NOTFOUND if the user is not found.
func (s *Store) Login(email, password string) (domain.User, error) {
	const op = "AuthStore.Login"

	user, err := s.userStore.FindByEmail(email)
	if err != nil {
		return domain.User{}, &errors.Error{Code: errors.NOTFOUND, Message: ErrLoginMsg, Operation: op, Err: err}
	}

	err = bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(password))
	if err != nil {
		return domain.User{}, &errors.Error{Code: errors.NOTFOUND, Message: ErrLoginMsg, Operation: op, Err: err}
	}

	err = s.userStore.UpdateToken(user.Token)
	if err != nil {
		return domain.User{}, err
	}

	return user, nil
}