open-vault/website/source/docs/auth/github.html.md

layout	page_title	sidebar_current	description
docs	Auth Backend: GitHub	docs-auth-github	The GitHub auth backend allows authentication with Vault using GitHub.

Auth Backend: GitHub

Name: github

The GitHub auth backend can be used to authenticate with Vault using a GitHub personal access token. This method of authentication is most useful for humans: operators or developers using Vault directly via the CLI.

N.B.: Vault does not support an OAuth workflow to generate GitHub tokens; in addition, GitHub does not support registering applications at an organizational level. As a result, this backend uses personal access tokens. An important consequence is that any valid GitHub access token with the read:org scope can be used for authentication. If such a token is stolen from a third party service, and the attacker is able to make network calls to Vault, they will be able to log in as the user that generated the access token. When using this backend it is a good idea to ensure that access to Vault is restricted at a network level rather than public.

Authentication

Via the CLI

$ vault auth -method=github token=<api token>
...

Via the API

The endpoint for the GitHub login is auth/github/login.

The github mountpoint value in the url is the default mountpoint value. If you have mounted the github backend with a different mountpoint, use that value.

The token should be sent in the POST body encoded as JSON.

$ curl $VAULT_ADDR/v1/auth/github/login \
    -d '{ "token": "your_github_personal_access_token" }'

The response will be in JSON. For example:

{
  "auth": {
    "renewable": true,
    "lease_duration": 2764800,
    "metadata": {
      "username": "vishalnayak",
      "org": "hashicorp"
    },
    "policies": [
      "default",
      "dev-policy"
    ],
    "accessor": "f93c4b2d-18b6-2b50-7a32-0fecf88237b8",
    "client_token": "1977fceb-3bfa-6c71-4d1f-b64af98ac018"
  },
  "warnings": null,
  "wrap_info": null,
  "data": null,
  "lease_duration": 0,
  "renewable": false,
  "lease_id": "",
  "request_id": "3c346f3b-e089-39ab-a953-a349f2284e3c"
}

Configuration

First, you must enable the GitHub auth backend:

$ vault auth-enable github
Successfully enabled 'github' at 'github'!

Now when you run vault auth -methods, the GitHub backend is available:

Path       Type      Description
github/    github
token/     token     token based credentials

Prior to using the GitHub auth backend, it must be configured. To configure it, use the /config endpoint with the following arguments:

• organization (string, required) - The organization name a user must be a part of to authenticate.
• base_url (string, optional) - For GitHub Enterprise or other API-compatible servers, the base URL to access the server.
• max_ttl (string, optional) - Maximum duration after which authentication will be expired. This must be a string in a format parsable by Go's time.ParseDuration
• ttl (string, optional) - Duration after which authentication will be expired. This must be a string in a format parsable by Go's time.ParseDuration

###Generate a GitHub Personal Access Token Access your Personal Access Tokens in GitHub at https://github.com/settings/tokens. Generate a new Token that has the scope read:org. Save the generated token. This is what you will provide to vault.

For example:

$ vault write auth/github/config organization=hashicorp
Success! Data written to: auth/github/config

After configuring that, you must map the teams of that organization to policies within Vault. Use the map/teams/<team> endpoints to do that. Team names must be slugified, so if your team name is: Some Amazing Team, you will need to include it as: some-amazing-team. Example:

$ vault write auth/github/map/teams/dev value=dev-policy
Success! Data written to: auth/github/map/teams/dev

The above would make anyone in the dev team receive tokens with the policy dev-policy.

You can then auth with a user that is a member of the dev team using a Personal Access Token with the read:org scope.

You can also create mappings for specific users in a similar fashion with the map/users/<user> endpoint. Example:

$ vault write auth/github/map/users/user1 value=user1-policy
Success! Data written to: auth/github/map/teams/user1

Now a user with GitHub username user1 will be assigned the user1-policy on authentication, in addition to any team policies.

GitHub token can also be supplied from the env variable VAULT_AUTH_GITHUB_TOKEN.

$ vault auth -method=github token=000000905b381e723b3d6a7d52f148a5d43c4b45
Successfully authenticated! You are now logged in.
The token below is already saved in the session. You do not
need to "vault auth" again with the token.
token: 0d9ab511-bc25-4fb6-a58b-94ce12b8da9c
token_duration: 2764800
token_policies: [default dev-policy]

Clients can use this token to perform an allowed set of operations on all the paths contained by the policy set.