mirror of
https://github.com/oauth2-proxy/oauth2-proxy.git
synced 2024-11-28 09:08:44 +02:00
137 lines
5.9 KiB
Markdown
137 lines
5.9 KiB
Markdown
google_auth_proxy
|
|
=================
|
|
|
|
|
|
A reverse proxy that provides authentication using Google OAuth2 to validate
|
|
individual accounts, or a whole google apps domain.
|
|
|
|
[](http://travis-ci.org/bitly/google_auth_proxy)
|
|
|
|
|
|
|
|
|
|
## Architecture
|
|
|
|
```
|
|
_______ ___________________ __________
|
|
|Nginx| ----> |google_auth_proxy| ----> |upstream|
|
|
------- ------------------- ----------
|
|
||
|
|
\/
|
|
[google oauth2 api]
|
|
```
|
|
|
|
|
|
## Installation
|
|
|
|
1. Download [Prebuilt Binary](https://github.com/bitly/google_auth_proxy/releases) or build from `master` with `$ go get github.com/bitly/google_auth_proxy` which should put the binary in `$GOROOT/bin`
|
|
2. Register an OAuth Application with Google
|
|
3. Configure Google Auth Proxy using config file, command line options, or environment variables
|
|
4. Deploy behind a SSL endpoint (example provided for Nginx)
|
|
|
|
## OAuth Configuration
|
|
|
|
You will need to register an OAuth application with google, and configure it with Redirect URI(s) for the domain you
|
|
intend to run `google_auth_proxy` on.
|
|
|
|
1. Create a new project: https://console.developers.google.com/project
|
|
2. Under "APIs & Auth", choose "Credentials"
|
|
3. Now, choose "Create new Client ID"
|
|
* The Application Type should be **Web application**
|
|
* Enter your domain in the Authorized Javascript Origins `https://internal.yourcompany.com`
|
|
* Enter the correct Authorized Redirect URL `https://internal.yourcompany.com/oauth2/callback`
|
|
* NOTE: `google_auth_proxy` will _only_ callback on the path `/oauth2/callback`
|
|
4. Under "APIs & Auth" choose "Consent Screen"
|
|
* Fill in the necessary fields and Save (this is _required_)
|
|
5. Take note of the **Client ID** and **Client Secret**
|
|
|
|
|
|
## Configuration
|
|
|
|
`google_auth_proxy` can be configured via [config file](#config-file), [command line options](#command-line-options) or [environment variables](#environment-variables).
|
|
|
|
### Config File
|
|
|
|
An example [google_auth_proxy.cfg](contrib/google_auth_proxy.cfg.example) config file is in the contrib directory. It can be used by specifying `-config=/etc/google_auth_proxy.cfg`
|
|
|
|
### Command Line Options
|
|
|
|
```
|
|
Usage of google_auth_proxy:
|
|
-authenticated-emails-file="": authenticate against emails via file (one per line)
|
|
-client-id="": the Google OAuth Client ID: ie: "123456.apps.googleusercontent.com"
|
|
-client-secret="": the OAuth Client Secret
|
|
-config="": path to config file
|
|
-cookie-domain="": an optional cookie domain to force cookies to (ie: .yourcompany.com)*
|
|
-cookie-expire=168h0m0s: expire timeframe for cookie
|
|
-cookie-httponly=true: set HttpOnly cookie
|
|
-cookie-https-only=true: set HTTPS only cookie
|
|
-cookie-secret="": the seed string for secure cookies
|
|
-display-htpasswd-form=true: display username / password login form if an htpasswd file is provided
|
|
-google-apps-domain=: authenticate against the given Google apps domain (may be given multiple times)
|
|
-htpasswd-file="": additionally authenticate against a htpasswd file. Entries must be created with "htpasswd -s" for SHA encryption
|
|
-http-address="127.0.0.1:4180": [http://]<addr>:<port> or unix://<path> to listen on for HTTP clients
|
|
-pass-basic-auth=true: pass HTTP Basic Auth, X-Forwarded-User and X-Forwarded-Email information to upstream
|
|
-pass-host-header=true: pass the request Host Header to upstream
|
|
-redirect-url="": the OAuth Redirect URL. ie: "https://internalapp.yourcompany.com/oauth2/callback"
|
|
-skip-auth-regex=: bypass authentication for requests path's that match (may be given multiple times)
|
|
-upstream=: the http url(s) of the upstream endpoint. If multiple, routing is based on path
|
|
-version=false: print version string
|
|
```
|
|
|
|
### Environment variables
|
|
|
|
The environment variables `GOOGLE_AUTH_PROXY_CLIENT_ID`, `GOOGLE_AUTH_PROXY_CLIENT_SECRET`, `GOOGLE_AUTH_PROXY_COOKIE_SECRET`, `GOOGLE_AUTH_PROXY_COOKIE_DOMAIN` and `GOOGLE_AUTH_PROXY_COOKIE_EXPIRE` can be used in place of the corresponding command-line arguments.
|
|
|
|
### Example Nginx Configuration
|
|
|
|
This example has a [Nginx](http://nginx.org/) SSL endpoint proxying to `google_auth_proxy` on port `4180`.
|
|
`google_auth_proxy` then authenticates requests for an upstream application running on port `8080`. The external
|
|
endpoint for this example would be `https://internal.yourcompany.com/`.
|
|
|
|
An example Nginx config follows. Note the use of `Strict-Transport-Security` header to pin requests to SSL
|
|
via [HSTS](http://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security):
|
|
|
|
```
|
|
server {
|
|
listen 443 default ssl;
|
|
server_name internal.yourcompany.com;
|
|
ssl_certificate /path/to/cert.pem;
|
|
ssl_certificate_key /path/to/cert.key;
|
|
add_header Strict-Transport-Security max-age=1209600;
|
|
|
|
location / {
|
|
proxy_pass http://127.0.0.1:4180;
|
|
proxy_set_header Host $host;
|
|
proxy_set_header X-Real-IP $remote_addr;
|
|
proxy_set_header X-Scheme $scheme;
|
|
proxy_connect_timeout 1;
|
|
proxy_send_timeout 30;
|
|
proxy_read_timeout 30;
|
|
}
|
|
}
|
|
```
|
|
|
|
The command line to run `google_auth_proxy` would look like this:
|
|
|
|
```bash
|
|
./google_auth_proxy \
|
|
--redirect-url="https://internal.yourcompany.com/oauth2/callback" \
|
|
--google-apps-domain="yourcompany.com" \
|
|
--upstream=http://127.0.0.1:8080/ \
|
|
--cookie-secret=... \
|
|
--cookie-https-only=true \
|
|
--client-id=... \
|
|
--client-secret=...
|
|
```
|
|
|
|
|
|
## Endpoint Documentation
|
|
|
|
Google Auth Proxy responds directly to the following endpoints. All other endpoints will be proxied upstream when authenticated.
|
|
|
|
* /ping - returns an 200 OK response
|
|
* /oauth2/sign_in - the login page, which also doubles as a sign out page (it clears cookies)
|
|
* /oauth2/start - a URL that will redirect to start the OAuth cycle
|
|
* /oauth2/callback - the URL used at the end of the OAuth cycle
|