Coherence (Coherence v0.8.0)
Coherence is a full featured, configurable authentication and user management system for Phoenix, providing a number of optional features configured with a installation mix task:
- 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.
See the README file for an overview, installation, and setup instructions.
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
The following options can be customized (default shown):
config :coherence,
password_hash_field: :password_hash # you must recompile Coherence after changing this
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 :protected
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 confirmation 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 following options can be customized (default shown):
config :coherence,
confirmation_token_expire_days: 5,
allow_unconfirmed_access_for: 0 # number of days. 0 to disable
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 following options can be customized (default shown):
config :coherence,
reset_token_expire_days: 2
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:
The following options can be customized (default shown):
config :coherence,
unlock_timeout_minutes: 5,
max_failed_login_attempts: 5
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 following options can be customized (default shown):
config :coherence,
unlock_token_expire_minutes: 5
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 options can be customized (default shown):
config :coherence,
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
Backwords compatibility note: For versions of Phoenix previous to 1.3 use mix coherence.<command>
. The new mix coh.<command>
better understands the newer Phoenix patterns.
Installer
The following examples illustrate various configuration scenarios for the install mix task:
# Install with only the `authenticatable` option
$ mix coh.install
# Install all the options except `confirmable` and `invitable`
$ mix coh.install --full
# Install all the options except `invitable`
$ mix coh.install --full-confirmable
# Install all the options except `confirmable`
$ mix coh.install --full-invitable
# Install the `full` options except `lockable` and `trackable`
$ mix coh.install --full --no-lockable --no-trackable
And some reinstall examples:
# Reinstall with defaults (--silent --no-migrations --no-config --confirm-once)
$ mix coh.install --reinstall
# Confirm to overwrite files, show instructions, and generate migrations
$ mix coh.install --reinstall --no-confirm-once --with-migrations
Run $ mix help coh.install
for more information.
Clean
The following examples illustrate how to remove the files created by the installer:
# Clean all the installed files
$ mix coh.clean --all
# Clean only the installed view and template files
$ mix coh.clean --views --templates
# Clean all but the models
$ mix coh.clean --all --no-models
# Prompt once to confirm the removal
$ mix coh.clean --all --confirm-once
After installation, if you later want to remove one more options, here are a couple examples:
# Clean one option
$ mix coh.clean --options=recoverable
# Clean several options without confirmation
$ mix coh.clicked --no-confirm --options="recoverable unlockable-with-token"
# Test the uninstaller without removing files
$ mix coh.clicked --dry-run --options="recoverable unlockable-with-token"
Run $ mix help coh.install
or $ mix help coherence.install
for more information.
Summary
Functions
Get the currently logged in user data.
Get the currently logged in user name.
Check if user is logged in.
Updates the user login data in the current sessions.
Updates the user login data in all the sessions belonging to the user.
Get the currently assigned user_token
Verify a user token for channel authentication.
Functions
current_user(conn)
Get the currently logged in user data.
current_user_name(conn, field \\ :name)
Get the currently logged in user name.
logged_in?(conn)
Check if user is logged in.
update_user_login(conn, user)
Updates the user login data in the current sessions.
Other sessions belonging to the same user won't be updated.
Requires access to the conn
, which means it can't be called outside of the context of a conn.
To update all session belonging to the user see update_user_login/1
.
update_user_logins(user)
Updates the user login data in all the sessions belonging to the user.
All sessions belonging to the same user will be updated.
Doesn't need access to the conn
, which means it can be called anywhere.
To update only the current session see update_user_login/2
user_token(conn)
Get the currently assigned user_token
verify_user_token(socket, token, assign_fun)
Verify a user token for channel authentication.