This is the reference implementation of the Broker side of the Portier_
protocol specification. Feedback is welcome on GitHub.
.. _Portier: https://portier.github.io/ .. _specification: protocol.md .. _GitHub: https://github.com/portier/portier-broker
Portier is specified such that everyone can run their own Broker instance. You can point your Relying Parties at your own broker, so that you do not have to depend on the broker run by the Portier project.
Currently, this project does not ship any binaries. However, once you have the
Rust toolchain installed_, building portier broker is very simple:
.. code-block:: shell
$ cargo install portier_broker
This should fetch and install the Portier broker. The binary is installed into
~/.cargo/bin/ by default. Running the portier-broker binary requires
a short configuration file. An example is provided in config.toml.dist.
To run the broker, invoke it with the path to a configuration file:
.. code-block:: shell
$ portier-broker config.toml
You can also supply all required settings as environment variables and completely omit the configuration file.
You will also need a Redis server and an outgoing SMTP server.
.. _installed: https://doc.rust-lang.org/book/getting-started.html
should be in the format <host>:<port>. The username and password
fields are optional, and may be set to provide login credentials.
See config.toml.dist for an example configuration file. This file includes
reasonable default values for most settings, but you must explicitly set:
server.public_url: The server's public-facing URL.crypto.keyfiles: An array of paths to encryption keys, orcrypto.keytext: The text of an encryption key in PEM format (takes precedence over keyfiles).redis.url: The URL of a Redis server for temporary session storage.smtp.from_address: The email address that outgoing mail is from.smtp.server: The host and port of the outgoing mail server.If necessary, set smtp.username and smtp.password to your SMTP server's
username and password.
To support in-browser Google Authentication for Gmail users, you must also specify:
google.client_id: Your Google OAuth API Client IDYou can create encryption keys with openssl genrsa 4096 > private.pem
The complete list of available values are:
[server] section:
=============== ====================== =====================
config.toml Environment Variable Default
=============== ====================== =====================
listenip BROKERIP "127.0.0.1"
listenport BROKERPORT 3333
publicurl BROKERPUBLICURL (none)
allowedorigins BROKERALLOWEDORIGINS (none (unrestricted))
=============== ====================== =====================
[headers] section:
=============== ==================== ================
config.toml Environment Variable Default
=============== ==================== ================
staticttl BROKERSTATICTTL 604800 (1 week)
discoveryttl BROKERDISCOVERYTTL 604800 (1 week)
keysttl BROKERKEYS_TTL 86400 (1 day)
=============== ==================== ================
[crypto] section:
=============== ==================== ================
config.toml Environment Variable Default
=============== ==================== ================
tokenttl BROKERTOKENTTL 600 (10 minutes)
keyfiles BROKERKEYFILES [] (empty array)
keytext BROKER_KEYTEXT (none)
=============== ==================== ================
[redis] section:
=============== ==================== ================
config.toml Environment Variable Default
=============== ==================== ================
url BROKERREDISURL (none)
sessionttl BROKERSESSIONTTL 900 (15 minutes)
cachettl BROKERCACHETTL 3600 (1 hour)
=============== ==================== ================
[smtp] section:
=============== ==================== =========
config.toml Environment Variable Default
=============== ==================== =========
fromname BROKERFROMNAME "Portier"
fromaddress BROKERFROMADDRESS (none)
server BROKERSMTPSERVER (none)
username BROKERSMTPUSERNAME (none)
password BROKERSMTPPASSWORD (none)
=============== ==================== =========
[limit] section:
=============== ====================== =======
config.toml Environment Variable Default
=============== ====================== =======
peremail BROKERLIMITPEREMAIL "5/min"
=============== ====================== =======
[google] section:
=============== ======================= =======
config.toml Environment Variable Default
=============== ======================= =======
clientid BROKERGOOGLECLIENTID (none)
=============== ======================= =======
[domain_overrides] section:
This section contains arbitrary domain names, mapped to a list of WebFinger-like links, allowing local configuration on the broker to skip and override WebFinger queries for some domains.
This is currently most useful for G Suite domains that don't respond to WebFinger, which can be specified as:
.. code-block:: toml
[[domain_overrides."my-apps-domain.example"]] rel = "https://portier.io/specs/auth/1.0/idp/google" href = "https://accounts.google.com"
When the [google] section is present, default overrides are added for
gmail.com and googlemail.com.
If you want to hack on the broker code, clone this repository. If you have the
Rust toolchain installed (see above), you can run cargo build to build the
project in debug mode. cargo run -- <config-file> will run the project. You
will have to set up your own configuration file; use config.toml.dist as a
template.
The broker binds to 127.0.0.1:3333 by default. It only speaks HTTP, so you
must run it behind a reverse proxy like nginx to expose it to the web via TLS.
Note that the broker will serve up files from the .well-known directory
in the current working directory when executed; this makes it relatively easy
to request a certificate from Let's Encrypt_.
If you want to test a custom identity provider, you may want to do so locally
over plain HTTP, without TLS. This can be enabled with a compile-time flag as
follows: cargo run --features insecure -- <config-file>. With this flag,
WebFinger queries are sent over plain HTTP, and plain HTTP links in the
WebFinger response are allowed.
If you want to test support for well-known identity providers, you will need
to configure them. For Google, you can request credentials through their
API Manager_.
It is not necessary to run your own email server for testing. Instead, use
MailCatcher_ or MailHog_ to get a dummy SMTP interface. The relevant part
of configuration to use MailCatcher with default settings can look like this:
.. code-block:: shell
[smtp] # Display name for confirmation emails - Default: "Portier" fromname = "Portier" # Sender address for confirmation emails - Default: (none) fromaddress = "test@example.com" # Outgoing mailserver address - Default: (none) server = "127.0.0.1:1025"
To test your changes, you will need to set up a Relying Party; so far, the
Python demo-rp code has been used. This is a very bare-bones implementation
that only serves to prove authentication to the broker.
.. _demo-rp: https://github.com/portier/demo-rp .. _Let's Encrypt: https://letsencrypt.org/ .. _API Manager: https://console.developers.google.com/apis/credentials .. _MailCatcher: https://mailcatcher.me/ .. _MailHog: https://github.com/mailhog/MailHog