JWT Integration For Yii 2 ¶

1. Installation
2. Basic usage
3. Using component for REST authentication
4. JWT Usage
5. JSON Web Tokens

This extension provides the JWT integration for Yii 2 framework.

This is a fork of sizeg/yii2-jwt package

Version 3.x of this package uses lcobucci/jwt v4 and introduces critical BC changes with 2.x.
For 2.x (and lcobucci/jwt v3) install ^2.0.

Installation ¶

Add the package to your composer.json:

{
    "require": {
        "bizley/jwt": "^3.0"
    }
}

and run composer update or alternatively run composer require bizley/jwt:^3.0

Basic usage ¶

Add jwt component to your configuration file:

[
    'components' => [
        'jwt' => [
            'class' => \bizley\jwt\Jwt::class,
            'signer' => ... // Signer ID
            'signingKey' => ... // Secret key string or path to the signing key file
        ],
    ],
],

Available signers ¶

Symmetric:

• HMAC (HS256, HS384, HS512)

Asymmetric:

• RSA (RS256, RS384, RS512)
• ECDSA (ES256, ES384, ES512)

Signer IDs are available as constants (like Jwt::HS256).

You can also provide your own signer, either as an instance of Lcobucci\JWT\Signer or by adding its config to signers and algorithmTypes and using its ID for signer.

Keys ¶

For symmetric signers signingKey is required. For asymmetric ones you also need to set verifyingKey. Keys can be provided as simple strings, configuration arrays, or instances of Lcobucci\JWT\Signer\Key.

Configuration array can be as the following:

[
    'key' => /* key content */,
    'passphrase' => /* key passphrase */,
    'store' => /* storage type */,
    'method' => /* method type */,
]

• key (Jwt::KEY) - string, default '',
• passphrase (Jwt::PASSPHRASE) - string, default '',
• store (Jwt::STORE) - string, default Jwt::STORE_IN_MEMORY, available: Jwt::STORE_IN_MEMORY, Jwt::STORE_LOCAL_FILE_REFERENCE (see https://lcobucci-jwt.readthedocs.io/en/latest/configuration/)
• method (Jwt::METHOD) - string, default Jwt::METHOD_PLAIN, available: Jwt::METHOD_PLAIN, Jwt::METHOD_BASE64, Jwt::METHOD_FILE (see https://lcobucci-jwt.readthedocs.io/en/latest/configuration/)

Simple string keys are shortcuts to the following array configs:

• key starts with @ or file://: `php [

  'key' => /* given key itself */,
  'passphrase' => '',
  'store' => Jwt::STORE_IN_MEMORY,
  'method' => Jwt::METHOD_FILE,
  

  ] ` Detecting @ at the beginning assumes Yii alias has been provided so it will be resolved with Yii::getAlias().

• key doesn't start with @ nor file://: `php [

  'key' => /* given key itself */,
  'passphrase' => '',
  'store' => Jwt::STORE_IN_MEMORY,
  'method' => Jwt::METHOD_PLAIN,
  

  ] `

Issuing a token example: ¶

$now = new \DateTimeImmutable();
/** @var \Lcobucci\JWT\Token\Plain $token */
$token = Yii::$app->jwt->getBuilder()
    // Configures the issuer (iss claim)
    ->issuedBy('http://example.com')
    // Configures the audience (aud claim)
    ->permittedFor('http://example.org')
    // Configures the id (jti claim)
    ->identifiedBy('4f1g23a12aa')
    // Configures the time that the token was issue (iat claim)
    ->issuedAt($now)
    // Configures the time that the token can be used (nbf claim)
    ->canOnlyBeUsedAfter($now->modify('+1 minute'))
    // Configures the expiration time of the token (exp claim)
    ->expiresAt($now->modify('+1 hour'))
    // Configures a new claim, called "uid"
    ->withClaim('uid', 1)
    // Configures a new header, called "foo"
    ->withHeader('foo', 'bar')
    // Builds a new token
    ->getToken(
        Yii::$app->jwt->getConfiguration()->signer(),
        Yii::$app->jwt->getConfiguration()->signingKey()
    );
$tokenString = $token->toString();

See https://lcobucci-jwt.readthedocs.io/en/latest/issuing-tokens/ for more info.

Parsing a token ¶

/** @var string $jwt */
/** @var \Lcobucci\JWT\Token $token */
$token = Yii::$app->jwt->parse($jwt);

See https://lcobucci-jwt.readthedocs.io/en/latest/parsing-tokens/ for more info.

Validating a token ¶

You can validate a token or perform an assertion on it (see https://lcobucci-jwt.readthedocs.io/en/latest/validating-tokens/).

For validation use: `php /* @var \Lcobucci\JWT\Token | string $token /
/* @var bool $result / $result = Yii::$app->jwt->validate($token); `

For assertion use: `php /* @var \Lcobucci\JWT\Token | string $token /
Yii::$app->jwt->assert($token); `

You must provide at least one constraint, otherwise Lcobucci\JWT\Validation\NoConstraintsGiven exception will be thrown. There are several ways to provide constraints:

• directly: `php Yii::$app->jwt->getConfiguration()->setValidationConstraints(/ constaints here /); `

• through component configuration: `php [

  'validationConstraints' => /*
      array of instances of Lcobucci\JWT\Validation\Constraint
        
      or
      array of configuration arrays that can be resolved as Constraint instances
        
      or
      anonymous function that can be resolved as array of Constraint instances with signature
      `function(\bizley\jwt\Jwt $jwt)` where $jwt will be an instance of this component
  */,
  

  ] `

Using component for REST authentication ¶

Configure the authenticator behavior in the controller.

class ExampleController extends Controller
{
    public function behaviors()
    {
        $behaviors = parent::behaviors();
        
        $behaviors['authenticator'] = [
            'class' => \bizley\jwt\JwtHttpBearerAuth::class,
        ];

        return $behaviors;
    }
}

There are special options available:

• jwt - string ID of component (default with 'jwt'), component configuration array, or an instance of bizley\jwt\Jwt,
• auth - \Closure or null (default) - anonymous function with signature function (\Lcobucci\JWT\Token $token) that should return identity of user authenticated with the JWT payload information. If $auth is not provided method yii\web\User::loginByAccessToken() will be called instead.

For other configuration options refer to the Yii 2 Guide.

JWT Usage ¶

Please refer to the lcobucci/jwt Documentation.

JSON Web Tokens ¶

• https://jwt.io