GraphQL JSON Web Token authenticator
This module provides a JWT-interface for creating JSON Web Tokens for authentication.
Installation
composer require firesphere/graphql-jwt
The default config is available in _config\config.yml
.
To set your signer key and UID prefix, add the following to your .env
:
JWT_PREFIX="[your secret prefix]"
JWT_SIGNER_KEY="[your secret key]"
A quick way to generate a secure random value value for JWT_SIGNER_KEY
is through a PHP CLI command:
php -r 'echo substr(base64_encode(random_bytes(64)), 0, 64) . "\n";'
You can also use public/private key files, using the following:
JWT_SIGNER_KEY="./path/to/private.key"
JWT_PUBLIC_KEY="./path/to/public.key"
Note: Relative paths will be relative to your BASE_PATH (prefixed with ./
)
Currently, only RSA keys are supported. ECDSA is not supported. The keys in the test-folder are generated by an online RSA key generator.
The signer key for HMAC can be of any length (keys longer than B bytes are first hashed using H). However, less than L bytes is strongly discouraged as it would decrease the security strength of the function.. Thus, for SHA-256 the signer key should be between 16 and 64 bytes in length.
The keys in tests/keys
should not be trusted!
Configuration
Since admin/graphql is reserved exclusively for CMS graphql access, it will be necessary for you to register a custom schema for your front-end application, and apply the provided queries and mutations to that.
For example, given you've decided to create a schema named frontend
at the url /api
---
Name: my-graphql-schema
---
SilverStripe\GraphQL\Manager:
schemas:
frontend:
types:
MemberToken: 'Firesphere\GraphQLJWT\Types\MemberTokenTypeCreator'
Member: 'Firesphere\GraphQLJWT\Types\MemberTypeCreator'
mutations:
createToken: 'Firesphere\GraphQLJWT\Mutations\CreateTokenMutationCreator'
refreshToken: 'Firesphere\GraphQLJWT\Mutations\RefreshTokenMutationCreator'
queries:
validateToken: 'Firesphere\GraphQLJWT\Queries\ValidateTokenQueryCreator'
---
Name: my-graphql-injections
---
SilverStripe\Core\Injector\Injector:
SilverStripe\GraphQL\Manager.frontend:
class: SilverStripe\GraphQL\Manager
constructor:
identifier: frontend
SilverStripe\GraphQL\Controller.frontend:
class: SilverStripe\GraphQL\Controller
constructor:
manager: '%$SilverStripe\GraphQL\Manager.frontend'
---
Name: my-graphql-routes
---
SilverStripe\Control\Director:
rules:
api:
Controller: '%$SilverStripe\GraphQL\Controller.frontend'
Stage: Live
Log in
To generate a JWT token, send a login request to the createToken
mutator:
mutation {
createToken(Email: "admin", Password: "password") {
Token, // ...request or you won't have a token
ID,
FirstName,
Surname
}
}
Validate token
If you have an app and want to validate your token, you can address the validateToken
method:
query validateToken {
validateToken {
Valid
Message
Code
}
}
It only needs to call the endpoint. The token should be in the header, via your middleware for the request, as a Authorization: Bearer [token]
. If the token is valid, you'll get a response like this:
{
"data": {
"validateToken": {
"Valid": true,
"Message": "",
"Code": 200,
"__typename": "ValidateToken"
}
}
}
If the token is invalid, Valid
will be false
.
Anonymous tokens
Although not advised, it's possible to use anonymous tokens. When using an anonymous authenticator, SilverStripe
will generate a default database record in the Members table with the Email anonymous
and no permissions by default.
To enable anonymous tokens, add the following to your configuration .yml
:
SilverStripe\Core\Injector\Injector:
Firesphere\GraphQLJWT\Mutations\CreateTokenMutationCreator:
properties:
CustomAuthenticators:
- Firesphere\GraphQLJWT\Authentication\AnonymousUserAuthenticator
You can then create an anonymous login with the below query.
mutation {
createToken(Email: "anonymous") {
Token
}
}
Note: If the default anonymous authenticator doesn't suit your purposes, you can inject any other
core SilverStripe authenticator into CustomAuthenticators
.
Warning: The default AnonymousUserAuthenticator
is not appropriate for general usage, so don't
register this under the core Security
class!
Enable CORS
To use JWT, CORS needs to be enabled. This can be done by adding the following to your configuration .yml
:
SilverStripe\GraphQL\Controller:
cors:
Enabled: true
Allow-Origin: "*"
Allow-Headers: "Authorization, Content-Type"
Allow-Methods: "GET, POST, OPTIONS"
Max-Age: 86400 # ...in seconds
Usage
After logging in, you will receive a token which can be used for further requests. This token should be in the header of the request with the Bearer
as signature:
Authorization: Bearer [token]
Security
Currently, the default method for encrypting the JWT is with SHA256. JWT is signed with multiple factors; including the host, audience (app/remote user), a secret key and a timeframe within which the token is valid. Only one device can be logged in at the time.
Supported services
By default, JWT only supports login. As it's tokens can not be disabled, nor used for password changes or resets.
Caveats
When using php under CGI/FastCGI mode with Apache, the Authorization
header might not work correctly, see issue#15. The workaround is simple, just add SetEnvIf Authorization .+ HTTP_AUTHORIZATION=$0
in your .htaccess
file (refer).
Examples
A Postman collection can be found in the extra
folder.
License
This module is published under BSD 3-clause license, although these are not in the actual classes, the license does apply:
http://www.opensource.org/licenses/BSD-3-Clause
Copyright (c) 2012-NOW(), Simon "Firesphere" Erkelens
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Cow?
Of course!
/( ,,,,, )\
_\,;;;;;;;,/_
.-"; ;;;;;;;;; ;"-.
'.__/`_ / \ _`\__.'
| (')| |(') |
| .--' '--. |
|/ o o \|
| |
/ \ _..=.._ / \
/:. '._____.' \
;::' / \ .;
| _|_ _|_ ::|
.-| '==o==' '|-.
/ | . / \ | \
| | ::| | | .|
| ( ') (. )::|
|: | |; U U ;|:: | `|
|' | | \ U U / |' | |
##V| |_/`"""`\_| |V##
##V## ##V##