Coherence

Alert: Project under active development!

This is an early release. So expect changes and new features in the near future.

Checkout the Coherence Demo Project to see an example project using Coherence.

Coherence is a full featured, configurable authentication system for Phoenix, with the following modules:

Database Authenticatable: handles hashing and storing an encrypted password in the database.
Invitable: sends invites to new users with a sign-up link, allowing the user to create their account with their own password.
Registerable: allows anonymous users to register a users email address and password.
Confirmable: new accounts require clicking a link in a confirmation email.
Recoverable: provides a link to generate a password reset link with token expiry.
Trackable: saves login statics like login counts, timestamps, and IP address for each user.
Lockable: locks an account when a specified number of failed sign-in attempts has been exceeded.
Unlockable With Token: provides a link to send yourself an unlock email.
Rememberable: provides persistent login with 'Remember me?' check box on login page.

Coherence provides flexibility by adding namespaced templates and views for only the options specified by the mix coherence.install command. This boiler plate code is added to your web/templates/coherence and web/views/coherence directories.

Once the boilerplate has been generated, you free to customize the source as required.

As well, a web/coherence_web.ex is added. Migrations are also generated to add the required database fields.

Installation

Add coherence to your list of dependencies in mix.exs:

def deps do [{:coherence, "~> 0.1"}] end
Ensure coherence is started before your application:

def application do [applications: [:coherence]] end

Getting Started

First, decide with modules you would like to use for your project. For the following example were are going to use a full install except for the registerable option.

Run the installer

$ mix coherence.install --full-invitable

This will:

add the coherence configuration to the end of your config/config.exs file.
add a new User model if one does not already exist
add migration files
- timestamp_add_coherence_to_user.exs if the User model already exists
- timestamp_create_coherence_user.exs if the User model does not exist
- timestamp_create_coherence_invitable.exs
add view files web/view/coherence/
add template files to web/templates/coherence
add email files to web/emails/coherence
add web/coherence_web.ex file

You should review your config/config.exs as there are a couple items you will need to customize like email address and mail api_key.

See Installer for more install options.

You will need to update a few files manually.

# web/router.ex

defmodule MyProject.Router do
  use MyProject.Web, :router
  use Coherence.Router         # Add this

  pipeline :browser do
    plug :accepts, ["html"]
    plug :fetch_session
    plug :fetch_flash
    plug :protect_from_forgery
    plug :put_secure_browser_headers
    plug Coherence.Authentication.Session, login: true
  end

  pipeline :public do
    plug :accepts, ["html"]
    plug :fetch_session
    plug :fetch_flash
    plug :protect_from_forgery
    plug :put_secure_browser_headers
    plug Coherence.Authentication.Session
  end

  # Add this block
  scope "/" do
    pipe_through :public
    coherence_routes :public
  end

  # Add this block
  scope "/" do
    pipe_through :browser
    coherence_routes :private
  end

  scope "/", MyProject do
    pipe_through :public

    get "/", PageController, :index
    # add public resource below
  end

  scope "/", MyProject do
    pipe_through :browser

    # add protected resources below
    resources "/privates", MyProject.PrivateController
  end
end

Important: Note the name spacing above. Unless you generate coherence controllers, ensure that the scopes, scope "/" do, do not include your projects' scope here. If so, the coherence routes will not work!

If the installer created a user model (one did not already exist), there is nothing you need to do with that generated file. Otherwise, update your existing model like this:

# web/models/user.ex

defmodule MyProject.User do
  use MyProject.Web, :model
  use Coherence.Schema                                    # Add this

  schema "users" do
    field :name, :string
    field :email, :string
    coherence_schema                                      # Add this

    timestamps
  end

  def changeset(model, params \\ %{}) do
    model
    |> cast(params, [:name, :email] ++ coherence_fields)  # Add this
    |> validate_required([:name, :email])
    |> validate_coherence(params)                         # Add this
  end
end

Option Overview

Authenticatable

Handles hashing and storing an encrypted password in the database.

Provides /sessions/new and /sessions/delete routes for logging in and out with the appropriate templates and view.

The following columns are added the <timestamp>_add_coherence_to_user.exs migration:

:password_hash, :string - the encrypted password

Invitable

Handles sending invites to new users with a sign-up link, allowing the user to create their account with their own password.

Provides /invitations/new and invitations/edit routes for creating a new invitation and creating a new account from the invite email.

These routes can be configured to require login by using the coherence_routes :private macro in your router.exs file.

Invitation token timeout will be added in the future.

The following table is created by the generated <timestamp>_create_coherence_invitable.exs migration:

create table(:invitations) do
  add :name, :string
  add :email, :string
  add :token, :string
end

Registerable

Allows anonymous users to register a users email address and password.

Provides /registrations/new and /registrations/create routes for creating a new registration.

Adds a Register New Account to the log-in page.

It is recommended that the :confirmable option is used with :registerable to ensure a valid email address is captured.

Confirmable

Requires a new account be conformed. During registration, a conformation token is generated and sent to the registering email. This link must be clicked before the user can sign-in.

Provides edit action for the /confirmations route.

The confirmation token expiry default of 5 days can be changed with the :confirmation_token_expire_days config entry.

Recoverable

Allows users to reset their password using an expiring token send by email.

Provides new, create, edit, update actions for the /passwords route.

Adds a "Forgot your password?" link to the log-in form. When clicked, the user provides their email address and if found, sends a reset password instructions email with a reset link.

The expiry timeout can be changed with the :reset_token_expire_days config entry.

Trackable

Saves login statics like login counts, timestamps, and IP address for each user.

Adds the following database field to your User model with the generated migration:

add :sign_in_count, :integer, default: 0  # how many times the user has logged in
add :current_sign_in_at, :datetime        # the current login timestamp
add :last_sign_in_at, :datetime           # the timestamp of the previous login
add :current_sign_in_ip, :string          # the current login IP adddress
add :last_sign_in_ip, :string             # the IP address of the previous login

Lockable

Locks an account when a specified number of failed sign-in attempts has been exceeded.

The following defaults can be changed with the following config entries:

:unlock_timeout_minutes
:max_failed_login_attempts

Adds the following database field to your User model with the generated migration:

add :failed_attempts, :integer, default: 0
add :unlock_token, :string
add :locked_at, :datetime

Unlockable with Token

Provides a link to send yourself an unlock email. When the user clicks the link, the user is presented a form to enter their email address and password. If the token has not expired and the email and password are valid, a unlock email is sent to the user's email address with an expiring token.

The default expiry time can be changed with the :unlock_token_expire_minutes config entry.

Remember Me

The rememberable option provides persistent login when the 'Remember Me?' box is checked during login.

With this feature, you will automatically be logged in from the same browser when your current login session dies using a configurable expiring persistent cookie.

For security, both a token and series number stored in the cookie on initial login. Each new creates a new token, but preserves the series number, providing protection against fraud. As well, both the token and series numbers are hashed before saving them to the database, providing protection if the database is compromised.

The following defaults can be changed with the following config entries:

:rememberable_cookie_expire_hours (2*24)
:login_cookie ("coherence_login")

The following table is created by the generated <timestamp>_create_coherence_rememberable.exs migration:

create table(:rememberables) do
  add :series_hash, :string
  add :token_hash, :string
  add :token_created_at, :datetime
  add :user_id, references(:users, on_delete: :delete_all)

  timestamps
end
create index(:rememberables, [:user_id])
create index(:rememberables, [:series_hash])
create index(:rememberables, [:token_hash])
create unique_index(:rememberables, [:user_id, :series_hash, :token_hash])

The --rememberable install option is not provided in any of the installer group options. You must provide the --rememberable option to install the migration and its support.

Mix Tasks

Installer

The following examples illustrate various configuration scenarios for the install mix task:

    # Install with only the `authenticatable` option
    $ mix coherence.install

    # Install all the options except `confirmable` and `invitable`
    $ mix coherence.install --full

    # Install all the options except `invitable`
    $ mix coherence.install --full-confirmable

    # Install all the options except `confirmable`
    $ mix coherence.install --full-invitable

    # Install the `full` options except `lockable` and `trackable`
    $ mix coherence.install --full --no-lockable --no-trackable

Run $ mix help coherence.install for more information.

Clean

The following examples illustrate how to remove the files created by the installer:

  # Clean all the installed files
  $ mix coherence.clean --all

  # Clean only the installed view and template files
  $ mix coherence.clean --views --templates

  # Clean all but the models
  $ mix coherence.clean --all --no-models

  # Prompt once to confirm the removal
  $ mix coherence.clean --all --confirm-once

Customization

The coherence.install mix task generates a bunch of boiler plate code so you can easily customize the views, templates, and mailer.

Also, checkout the Coherence.Config module for a list of config items you can use to tune the behaviour of Coherence.

Custom Controllers

By default, controller boilerplate is not generated unless the --controllers option is provided to mix coherence.install.

The generated controllers are named MyProject.Coherence.SessionController as an example. Generated controllers are located in web/controllers/coherence/

If the controllers are generated, you will need to change your router to use the new names. For example:

  # web/router.ex
  use MyProject.Web, :router
  use Coherence.Router

  # ...

  scope "/", MyProject do   # note the addition of MyProject
    pipe_through :public
    coherence_routes :public
  end

  scope "/", MyProject do   # note the addition of MyProject
    pipe_through :browser
    coherence_routes :private
  end
  # ...
end

Contributing

We appreciate any contribution to Coherence. Check our CODE_OF_CONDUCT.md and CONTRIBUTING.md guides for more information. We usually keep a list of features and bugs in the issue tracker.

References

Detailed Example Coherence Demo
Docs

License

The source is released under the MIT License.

Check LICENSE for more information.

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README.md

README.md

Coherence

Installation

Getting Started

Option Overview

Authenticatable

Invitable

Registerable

Confirmable

Recoverable

Trackable

Lockable

Unlockable with Token

Remember Me

Mix Tasks

Installer

Clean

Customization

Custom Controllers

Contributing

References

License

Files

README.md

Latest commit

History

README.md

File metadata and controls

Coherence

Installation

Getting Started

Option Overview

Authenticatable

Invitable

Registerable

Confirmable

Recoverable

Trackable

Lockable

Unlockable with Token

Remember Me

Mix Tasks

Installer

Clean

Customization

Custom Controllers

Contributing

References

License