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Joel Speed
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# Vx.x.x (Pre-release)
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## Changes since v2.2:
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- Repository forked on 27/11/18
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- README updated to include note that this repository is forked
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- CHANGLOG created to track changes to repository from original fork
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137
README.md
137
README.md
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oauth2_proxy
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=================
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# oauth2_proxy
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A reverse proxy and static file server that provides authentication using Providers (Google, GitHub, and others)
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to validate accounts by email, domain or group.
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[](http://travis-ci.org/bitly/oauth2_proxy)
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**Note:** This repository was forked from [Bitly/OAuth2_Proxy](https://github.com/bitly/oauth2_proxy) on 27/11/2018.
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Versions v3.0.0 and up are from this fork and will have diverged from any changes in the original fork.
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A list of changes can be seen in the [CHANGELOG](CHANGELOG.md).
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[](http://travis-ci.org/bitly/oauth2_proxy)
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@ -15,15 +17,17 @@ to validate accounts by email, domain or group.
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## Installation
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1. Download [Prebuilt Binary](https://github.com/bitly/oauth2_proxy/releases) (current release is `v2.2`) or build with `$ go get github.com/bitly/oauth2_proxy` which will put the binary in `$GOROOT/bin`
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Prebuilt binaries can be validated by extracting the file and verifying it against the `sha256sum.txt` checksum file provided for each release starting with version `v2.3`.
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1. Download [Prebuilt Binary](https://github.com/bitly/oauth2_proxy/releases) (current release is `v2.2`) or build with `$ go get github.com/bitly/oauth2_proxy` which will put the binary in `$GOROOT/bin`
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Prebuilt binaries can be validated by extracting the file and verifying it against the `sha256sum.txt` checksum file provided for each release starting with version `v2.3`.
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```
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sha256sum -c sha256sum.txt 2>&1 | grep OK
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oauth2_proxy-2.3.linux-amd64: OK
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```
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2. Select a Provider and Register an OAuth Application with a Provider
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3. Configure OAuth2 Proxy using config file, command line options, or environment variables
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4. Configure SSL or Deploy behind a SSL endpoint (example provided for Nginx)
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2. Select a Provider and Register an OAuth Application with a Provider
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3. Configure OAuth2 Proxy using config file, command line options, or environment variables
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4. Configure SSL or Deploy behind a SSL endpoint (example provided for Nginx)
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## OAuth Provider Configuration
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@ -31,12 +35,12 @@ You will need to register an OAuth application with a Provider (Google, GitHub o
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Valid providers are :
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* [Google](#google-auth-provider) *default*
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* [Azure](#azure-auth-provider)
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* [Facebook](#facebook-auth-provider)
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* [GitHub](#github-auth-provider)
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* [GitLab](#gitlab-auth-provider)
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* [LinkedIn](#linkedin-auth-provider)
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- [Google](#google-auth-provider) _default_
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- [Azure](#azure-auth-provider)
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- [Facebook](#facebook-auth-provider)
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- [GitHub](#github-auth-provider)
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- [GitLab](#gitlab-auth-provider)
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- [LinkedIn](#linkedin-auth-provider)
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The provider can be selected using the `provider` configuration value.
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@ -44,61 +48,62 @@ The provider can be selected using the `provider` configuration value.
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For Google, the registration steps are:
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1. Create a new project: https://console.developers.google.com/project
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2. Choose the new project from the top right project dropdown (only if another project is selected)
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3. In the project Dashboard center pane, choose **"API Manager"**
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4. In the left Nav pane, choose **"Credentials"**
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5. In the center pane, choose **"OAuth consent screen"** tab. Fill in **"Product name shown to users"** and hit save.
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6. In the center pane, choose **"Credentials"** tab.
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* Open the **"New credentials"** drop down
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* Choose **"OAuth client ID"**
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* Choose **"Web application"**
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* Application name is freeform, choose something appropriate
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* Authorized JavaScript origins is your domain ex: `https://internal.yourcompany.com`
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* Authorized redirect URIs is the location of oauth2/callback ex: `https://internal.yourcompany.com/oauth2/callback`
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* Choose **"Create"**
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4. Take note of the **Client ID** and **Client Secret**
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1. Create a new project: https://console.developers.google.com/project
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2. Choose the new project from the top right project dropdown (only if another project is selected)
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3. In the project Dashboard center pane, choose **"API Manager"**
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4. In the left Nav pane, choose **"Credentials"**
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5. In the center pane, choose **"OAuth consent screen"** tab. Fill in **"Product name shown to users"** and hit save.
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6. In the center pane, choose **"Credentials"** tab.
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- Open the **"New credentials"** drop down
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- Choose **"OAuth client ID"**
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- Choose **"Web application"**
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- Application name is freeform, choose something appropriate
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- Authorized JavaScript origins is your domain ex: `https://internal.yourcompany.com`
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- Authorized redirect URIs is the location of oauth2/callback ex: `https://internal.yourcompany.com/oauth2/callback`
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- Choose **"Create"**
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7. Take note of the **Client ID** and **Client Secret**
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It's recommended to refresh sessions on a short interval (1h) with `cookie-refresh` setting which validates that the account is still authorized.
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#### Restrict auth to specific Google groups on your domain. (optional)
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1. Create a service account: https://developers.google.com/identity/protocols/OAuth2ServiceAccount and make sure to download the json file.
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2. Make note of the Client ID for a future step.
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3. Under "APIs & Auth", choose APIs.
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4. Click on Admin SDK and then Enable API.
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5. Follow the steps on https://developers.google.com/admin-sdk/directory/v1/guides/delegation#delegate_domain-wide_authority_to_your_service_account and give the client id from step 2 the following oauth scopes:
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1. Create a service account: https://developers.google.com/identity/protocols/OAuth2ServiceAccount and make sure to download the json file.
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2. Make note of the Client ID for a future step.
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3. Under "APIs & Auth", choose APIs.
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4. Click on Admin SDK and then Enable API.
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5. Follow the steps on https://developers.google.com/admin-sdk/directory/v1/guides/delegation#delegate_domain-wide_authority_to_your_service_account and give the client id from step 2 the following oauth scopes:
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```
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https://www.googleapis.com/auth/admin.directory.group.readonly
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https://www.googleapis.com/auth/admin.directory.user.readonly
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```
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6. Follow the steps on https://support.google.com/a/answer/60757 to enable Admin API access.
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7. Create or choose an existing administrative email address on the Gmail domain to assign to the ```google-admin-email``` flag. This email will be impersonated by this client to make calls to the Admin SDK. See the note on the link from step 5 for the reason why.
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8. Create or choose an existing email group and set that email to the ```google-group``` flag. You can pass multiple instances of this flag with different groups
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and the user will be checked against all the provided groups.
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9. Lock down the permissions on the json file downloaded from step 1 so only oauth2_proxy is able to read the file and set the path to the file in the ```google-service-account-json``` flag.
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6. Follow the steps on https://support.google.com/a/answer/60757 to enable Admin API access.
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7. Create or choose an existing administrative email address on the Gmail domain to assign to the `google-admin-email` flag. This email will be impersonated by this client to make calls to the Admin SDK. See the note on the link from step 5 for the reason why.
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8. Create or choose an existing email group and set that email to the `google-group` flag. You can pass multiple instances of this flag with different groups
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and the user will be checked against all the provided groups.
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9. Lock down the permissions on the json file downloaded from step 1 so only oauth2_proxy is able to read the file and set the path to the file in the `google-service-account-json` flag.
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10. Restart oauth2_proxy.
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Note: The user is checked against the group members list on initial authentication and every time the token is refreshed ( about once an hour ).
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### Azure Auth Provider
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1. [Add an application](https://azure.microsoft.com/en-us/documentation/articles/active-directory-integrating-applications/) to your Azure Active Directory tenant.
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2. On the App properties page provide the correct Sign-On URL ie `https://internal.yourcompany.com/oauth2/callback`
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3. If applicable take note of your `TenantID` and provide it via the `--azure-tenant=<YOUR TENANT ID>` commandline option. Default the `common` tenant is used.
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1. [Add an application](https://azure.microsoft.com/en-us/documentation/articles/active-directory-integrating-applications/) to your Azure Active Directory tenant.
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2. On the App properties page provide the correct Sign-On URL ie `https://internal.yourcompany.com/oauth2/callback`
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3. If applicable take note of your `TenantID` and provide it via the `--azure-tenant=<YOUR TENANT ID>` commandline option. Default the `common` tenant is used.
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The Azure AD auth provider uses `openid` as it default scope. It uses `https://graph.windows.net` as a default protected resource. It call to `https://graph.windows.net/me` to get the email address of the user that logs in.
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### Facebook Auth Provider
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1. Create a new FB App from <https://developers.facebook.com/>
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2. Under FB Login, set your Valid OAuth redirect URIs to `https://internal.yourcompany.com/oauth2/callback`
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1. Create a new FB App from <https://developers.facebook.com/>
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2. Under FB Login, set your Valid OAuth redirect URIs to `https://internal.yourcompany.com/oauth2/callback`
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### GitHub Auth Provider
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1. Create a new project: https://github.com/settings/developers
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2. Under `Authorization callback URL` enter the correct url ie `https://internal.yourcompany.com/oauth2/callback`
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1. Create a new project: https://github.com/settings/developers
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2. Under `Authorization callback URL` enter the correct url ie `https://internal.yourcompany.com/oauth2/callback`
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The GitHub auth provider supports two additional parameters to restrict authentication to Organization or Team level access. Restricting by org and team is normally accompanied with `--email-domain=*`
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@ -121,17 +126,16 @@ If you are using self-hosted GitLab, make sure you set the following to the appr
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-redeem-url="<your gitlab url>/oauth/token"
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-validate-url="<your gitlab url>/api/v4/user"
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### LinkedIn Auth Provider
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For LinkedIn, the registration steps are:
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1. Create a new project: https://www.linkedin.com/secure/developer
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2. In the OAuth User Agreement section:
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* In default scope, select r_basicprofile and r_emailaddress.
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* In "OAuth 2.0 Redirect URLs", enter `https://internal.yourcompany.com/oauth2/callback`
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3. Fill in the remaining required fields and Save.
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4. Take note of the **Consumer Key / API Key** and **Consumer Secret / Secret Key**
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1. Create a new project: https://www.linkedin.com/secure/developer
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2. In the OAuth User Agreement section:
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- In default scope, select r_basicprofile and r_emailaddress.
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- In "OAuth 2.0 Redirect URLs", enter `https://internal.yourcompany.com/oauth2/callback`
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3. Fill in the remaining required fields and Save.
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4. Take note of the **Consumer Key / API Key** and **Consumer Secret / Secret Key**
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### Microsoft Azure AD Provider
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OpenID Connect is a spec for OAUTH 2.0 + identity that is implemented by many major providers and several open source projects. This provider was originally built against CoreOS Dex and we will use it as an example.
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1. Launch a Dex instance using the [getting started guide](https://github.com/coreos/dex/blob/master/Documentation/getting-started.md).
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2. Setup oauth2_proxy with the correct provider and using the default ports and callbacks.
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3. Login with the fixture use in the dex guide and run the oauth2_proxy with the following args:
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1. Launch a Dex instance using the [getting started guide](https://github.com/coreos/dex/blob/master/Documentation/getting-started.md).
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2. Setup oauth2_proxy with the correct provider and using the default ports and callbacks.
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3. Login with the fixture use in the dex guide and run the oauth2_proxy with the following args:
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-provider oidc
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-client-id oauth2_proxy
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There are two recommended configurations.
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1) Configure SSL Termination with OAuth2 Proxy by providing a `--tls-cert=/path/to/cert.pem` and `--tls-key=/path/to/cert.key`.
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1. Configure SSL Termination with OAuth2 Proxy by providing a `--tls-cert=/path/to/cert.pem` and `--tls-key=/path/to/cert.key`.
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The command line to run `oauth2_proxy` in this configuration would look like this:
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--client-secret=...
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```
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2) Configure SSL Termination with [Nginx](http://nginx.org/) (example config below), Amazon ELB, Google Cloud Platform Load Balancing, or ....
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2. Configure SSL Termination with [Nginx](http://nginx.org/) (example config below), Amazon ELB, Google Cloud Platform Load Balancing, or ....
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Because `oauth2_proxy` listens on `127.0.0.1:4180` by default, to listen on all interfaces (needed when using an
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external load balancer like Amazon ELB or Google Platform Load Balancing) use `--http-address="0.0.0.0:4180"` or
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@ -321,12 +324,12 @@ The command line to run `oauth2_proxy` in this configuration would look like thi
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OAuth2 Proxy responds directly to the following endpoints. All other endpoints will be proxied upstream when authenticated. The `/oauth2` prefix can be changed with the `--proxy-prefix` config variable.
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* /robots.txt - returns a 200 OK response that disallows all User-agents from all paths; see [robotstxt.org](http://www.robotstxt.org/) for more info
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* /ping - returns an 200 OK response
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* /oauth2/sign_in - the login page, which also doubles as a sign out page (it clears cookies)
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* /oauth2/start - a URL that will redirect to start the OAuth cycle
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* /oauth2/callback - the URL used at the end of the OAuth cycle. The oauth app will be configured with this as the callback url.
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* /oauth2/auth - only returns a 202 Accepted response or a 401 Unauthorized response; for use with the [Nginx `auth_request` directive](#nginx-auth-request)
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- /robots.txt - returns a 200 OK response that disallows all User-agents from all paths; see [robotstxt.org](http://www.robotstxt.org/) for more info
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- /ping - returns an 200 OK response
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- /oauth2/sign_in - the login page, which also doubles as a sign out page (it clears cookies)
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- /oauth2/start - a URL that will redirect to start the OAuth cycle
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- /oauth2/callback - the URL used at the end of the OAuth cycle. The oauth app will be configured with this as the callback url.
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- /oauth2/auth - only returns a 202 Accepted response or a 401 Unauthorized response; for use with the [Nginx `auth_request` directive](#nginx-auth-request)
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## Request signatures
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@ -341,9 +344,9 @@ in `oauthproxy.go`](./oauthproxy.go).
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For more information about HMAC request signature validation, read the
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following:
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* [Amazon Web Services: Signing and Authenticating REST
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- [Amazon Web Services: Signing and Authenticating REST
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Requests](https://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html)
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* [rc3.org: Using HMAC to authenticate Web service
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- [rc3.org: Using HMAC to authenticate Web service
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requests](http://rc3.org/2011/12/02/using-hmac-to-authenticate-web-service-requests/)
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## Logging Format
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